net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015-2016  Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 /* the netlink family */
  36 static struct genl_family nl80211_fam;
  37
  38 /* multicast groups */
  39 enum nl80211_multicast_groups {
  40         NL80211_MCGRP_CONFIG,
  41         NL80211_MCGRP_SCAN,
  42         NL80211_MCGRP_REGULATORY,
  43         NL80211_MCGRP_MLME,
  44         NL80211_MCGRP_VENDOR,
  45         NL80211_MCGRP_NAN,
  46         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  47 };
  48
  49 static const struct genl_multicast_group nl80211_mcgrps[] = {
  50         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  51         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  52         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  53         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  54         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  55         [NL80211_MCGRP_NAN] = { .name = NL80211_MULTICAST_GROUP_NAN },
  56 #ifdef CONFIG_NL80211_TESTMODE
  57         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  58 #endif
  59 };
  60
  61 /* returns ERR_PTR values */
  62 static struct wireless_dev *
  63 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  64 {
  65         struct cfg80211_registered_device *rdev;
  66         struct wireless_dev *result = NULL;
  67         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  68         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  69         u64 wdev_id;
  70         int wiphy_idx = -1;
  71         int ifidx = -1;
  72
  73         ASSERT_RTNL();
  74
  75         if (!have_ifidx && !have_wdev_id)
  76                 return ERR_PTR(-EINVAL);
  77
  78         if (have_ifidx)
  79                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  80         if (have_wdev_id) {
  81                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  82                 wiphy_idx = wdev_id >> 32;
  83         }
  84
  85         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  86                 struct wireless_dev *wdev;
  87
  88                 if (wiphy_net(&rdev->wiphy) != netns)
  89                         continue;
  90
  91                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  92                         continue;
  93
  94                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
  95                         if (have_ifidx && wdev->netdev &&
  96                             wdev->netdev->ifindex == ifidx) {
  97                                 result = wdev;
  98                                 break;
  99                         }
 100                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 101                                 result = wdev;
 102                                 break;
 103                         }
 104                 }
 105
 106                 if (result)
 107                         break;
 108         }
 109
 110         if (result)
 111                 return result;
 112         return ERR_PTR(-ENODEV);
 113 }
 114
 115 static struct cfg80211_registered_device *
 116 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 117 {
 118         struct cfg80211_registered_device *rdev = NULL, *tmp;
 119         struct net_device *netdev;
 120
 121         ASSERT_RTNL();
 122
 123         if (!attrs[NL80211_ATTR_WIPHY] &&
 124             !attrs[NL80211_ATTR_IFINDEX] &&
 125             !attrs[NL80211_ATTR_WDEV])
 126                 return ERR_PTR(-EINVAL);
 127
 128         if (attrs[NL80211_ATTR_WIPHY])
 129                 rdev = cfg80211_rdev_by_wiphy_idx(
 130                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 131
 132         if (attrs[NL80211_ATTR_WDEV]) {
 133                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 134                 struct wireless_dev *wdev;
 135                 bool found = false;
 136
 137                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 138                 if (tmp) {
 139                         /* make sure wdev exists */
 140                         list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
 141                                 if (wdev->identifier != (u32)wdev_id)
 142                                         continue;
 143                                 found = true;
 144                                 break;
 145                         }
 146
 147                         if (!found)
 148                                 tmp = NULL;
 149
 150                         if (rdev && tmp != rdev)
 151                                 return ERR_PTR(-EINVAL);
 152                         rdev = tmp;
 153                 }
 154         }
 155
 156         if (attrs[NL80211_ATTR_IFINDEX]) {
 157                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 158
 159                 netdev = __dev_get_by_index(netns, ifindex);
 160                 if (netdev) {
 161                         if (netdev->ieee80211_ptr)
 162                                 tmp = wiphy_to_rdev(
 163                                         netdev->ieee80211_ptr->wiphy);
 164                         else
 165                                 tmp = NULL;
 166
 167                         /* not wireless device -- return error */
 168                         if (!tmp)
 169                                 return ERR_PTR(-EINVAL);
 170
 171                         /* mismatch -- return error */
 172                         if (rdev && tmp != rdev)
 173                                 return ERR_PTR(-EINVAL);
 174
 175                         rdev = tmp;
 176                 }
 177         }
 178
 179         if (!rdev)
 180                 return ERR_PTR(-ENODEV);
 181
 182         if (netns != wiphy_net(&rdev->wiphy))
 183                 return ERR_PTR(-ENODEV);
 184
 185         return rdev;
 186 }
 187
 188 /*
 189  * This function returns a pointer to the driver
 190  * that the genl_info item that is passed refers to.
 191  *
 192  * The result of this can be a PTR_ERR and hence must
 193  * be checked with IS_ERR() for errors.
 194  */
 195 static struct cfg80211_registered_device *
 196 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 197 {
 198         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 199 }
 200
 201 /* policy for the attributes */
 202 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 203         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 204         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 205                                       .len = 20-1 },
 206         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 207
 208         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 209         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 210         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 211         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 212         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 213
 214         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 215         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 216         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 217         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 218         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 219         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 220
 221         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 222         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 223         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 224
 225         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 226         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 227
 228         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 229         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 230                                     .len = WLAN_MAX_KEY_LEN },
 231         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 232         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 233         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 234         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 235         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 236
 237         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 238         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 239         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 240                                        .len = IEEE80211_MAX_DATA_LEN },
 241         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 242                                        .len = IEEE80211_MAX_DATA_LEN },
 243         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 244         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 245         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 246         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 247                                                .len = NL80211_MAX_SUPP_RATES },
 248         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 249         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 250         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 251         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 252                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 253         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 256         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 257
 258         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 259         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 261         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 262                                            .len = NL80211_MAX_SUPP_RATES },
 263         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 264
 265         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 266         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 267
 268         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 269
 270         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 271         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 272                               .len = IEEE80211_MAX_DATA_LEN },
 273         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 274         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 277                                 .len = IEEE80211_MAX_SSID_LEN },
 278         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 279         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 280         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 281         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 282         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 283         [NL80211_ATTR_STA_FLAGS2] = {
 284                 .len = sizeof(struct nl80211_sta_flag_update),
 285         },
 286         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 287         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 288         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 289         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 290         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 291         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 292         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 293         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 294         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 295                                  .len = WLAN_PMKID_LEN },
 296         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 297         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 298         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 299         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 300                                  .len = IEEE80211_MAX_DATA_LEN },
 301         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 302         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 303         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 304         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 305         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 306         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 307         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 308         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 309         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 310         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 311         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 312         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 313         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 314         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 316         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 317         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 319         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 320         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 321                                          .len = IEEE80211_MAX_DATA_LEN },
 322         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 323                                          .len = IEEE80211_MAX_DATA_LEN },
 324         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 325         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 327         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 328         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 329         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 330         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 334         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 335                                       .len = IEEE80211_MAX_DATA_LEN },
 336         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 337         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 338         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 339                 .len = NL80211_HT_CAPABILITY_LEN
 340         },
 341         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 342         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 343         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 344         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 345         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 346         [NL80211_ATTR_AUTH_DATA] = { .type = NLA_BINARY, },
 347         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 348         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 349         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 350         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 351         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 352         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 353         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 354         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 355         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 356         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 357         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 358                 .len = NL80211_VHT_CAPABILITY_LEN,
 359         },
 360         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 361         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 362                                   .len = IEEE80211_MAX_DATA_LEN },
 363         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 364         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 365         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 366         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 367         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 368         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 369         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 370         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 371         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 372         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 373         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 374         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 375         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 376         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 377                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 378         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 379         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 380         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 381         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 382         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 383         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 384         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 385         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 386         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 387         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 388         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 389         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 390         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 391         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 392         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 393         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 395         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 396         [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
 397                 .len = VHT_MUMIMO_GROUPS_DATA_LEN
 398         },
 399         [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
 400         [NL80211_ATTR_NAN_MASTER_PREF] = { .type = NLA_U8 },
 401         [NL80211_ATTR_NAN_DUAL] = { .type = NLA_U8 },
 402         [NL80211_ATTR_NAN_FUNC] = { .type = NLA_NESTED },
 403         [NL80211_ATTR_FILS_KEK] = { .type = NLA_BINARY,
 404                                     .len = FILS_MAX_KEK_LEN },
 405         [NL80211_ATTR_FILS_NONCES] = { .len = 2 * FILS_NONCE_LEN },
 406         [NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED] = { .type = NLA_FLAG, },
 407         [NL80211_ATTR_BSSID] = { .len = ETH_ALEN },
 408 };
 409
 410 /* policy for the key attributes */
 411 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 412         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 413         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 414         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 415         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 416         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 417         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 418         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 419         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 420 };
 421
 422 /* policy for the key default flags */
 423 static const struct nla_policy
 424 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 425         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 426         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 427 };
 428
 429 #ifdef CONFIG_PM
 430 /* policy for WoWLAN attributes */
 431 static const struct nla_policy
 432 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 433         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 434         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 435         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 436         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 437         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 439         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 440         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 441         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 442         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 443 };
 444
 445 static const struct nla_policy
 446 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 447         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 448         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 449         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 450         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 451         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 452         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 453         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 454                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 455         },
 456         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 457                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 458         },
 459         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 460         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 461         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 462 };
 463 #endif /* CONFIG_PM */
 464
 465 /* policy for coalesce rule attributes */
 466 static const struct nla_policy
 467 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 468         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 469         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 470         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 471 };
 472
 473 /* policy for GTK rekey offload attributes */
 474 static const struct nla_policy
 475 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 476         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 477         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 478         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 479 };
 480
 481 static const struct nla_policy
 482 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 483         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 484                                                  .len = IEEE80211_MAX_SSID_LEN },
 485         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 486 };
 487
 488 static const struct nla_policy
 489 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 490         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 491         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 492 };
 493
 494 static const struct nla_policy
 495 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 496         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 497         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 498         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 499                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 500         },
 501 };
 502
 503 /* policy for NAN function attributes */
 504 static const struct nla_policy
 505 nl80211_nan_func_policy[NL80211_NAN_FUNC_ATTR_MAX + 1] = {
 506         [NL80211_NAN_FUNC_TYPE] = { .type = NLA_U8 },
 507         [NL80211_NAN_FUNC_SERVICE_ID] = { .type = NLA_BINARY,
 508                                     .len = NL80211_NAN_FUNC_SERVICE_ID_LEN },
 509         [NL80211_NAN_FUNC_PUBLISH_TYPE] = { .type = NLA_U8 },
 510         [NL80211_NAN_FUNC_PUBLISH_BCAST] = { .type = NLA_FLAG },
 511         [NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE] = { .type = NLA_FLAG },
 512         [NL80211_NAN_FUNC_FOLLOW_UP_ID] = { .type = NLA_U8 },
 513         [NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] = { .type = NLA_U8 },
 514         [NL80211_NAN_FUNC_FOLLOW_UP_DEST] = { .len = ETH_ALEN },
 515         [NL80211_NAN_FUNC_CLOSE_RANGE] = { .type = NLA_FLAG },
 516         [NL80211_NAN_FUNC_TTL] = { .type = NLA_U32 },
 517         [NL80211_NAN_FUNC_SERVICE_INFO] = { .type = NLA_BINARY,
 518                         .len = NL80211_NAN_FUNC_SERVICE_SPEC_INFO_MAX_LEN },
 519         [NL80211_NAN_FUNC_SRF] = { .type = NLA_NESTED },
 520         [NL80211_NAN_FUNC_RX_MATCH_FILTER] = { .type = NLA_NESTED },
 521         [NL80211_NAN_FUNC_TX_MATCH_FILTER] = { .type = NLA_NESTED },
 522         [NL80211_NAN_FUNC_INSTANCE_ID] = { .type = NLA_U8 },
 523         [NL80211_NAN_FUNC_TERM_REASON] = { .type = NLA_U8 },
 524 };
 525
 526 /* policy for Service Response Filter attributes */
 527 static const struct nla_policy
 528 nl80211_nan_srf_policy[NL80211_NAN_SRF_ATTR_MAX + 1] = {
 529         [NL80211_NAN_SRF_INCLUDE] = { .type = NLA_FLAG },
 530         [NL80211_NAN_SRF_BF] = { .type = NLA_BINARY,
 531                                  .len =  NL80211_NAN_FUNC_SRF_MAX_LEN },
 532         [NL80211_NAN_SRF_BF_IDX] = { .type = NLA_U8 },
 533         [NL80211_NAN_SRF_MAC_ADDRS] = { .type = NLA_NESTED },
 534 };
 535
 536 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 537                                      struct netlink_callback *cb,
 538                                      struct cfg80211_registered_device **rdev,
 539                                      struct wireless_dev **wdev)
 540 {
 541         int err;
 542
 543         rtnl_lock();
 544
 545         if (!cb->args[0]) {
 546                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 547                                   genl_family_attrbuf(&nl80211_fam),
 548                                   nl80211_fam.maxattr, nl80211_policy);
 549                 if (err)
 550                         goto out_unlock;
 551
 552                 *wdev = __cfg80211_wdev_from_attrs(
 553                                         sock_net(skb->sk),
 554                                         genl_family_attrbuf(&nl80211_fam));
 555                 if (IS_ERR(*wdev)) {
 556                         err = PTR_ERR(*wdev);
 557                         goto out_unlock;
 558                 }
 559                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 560                 /* 0 is the first index - add 1 to parse only once */
 561                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 562                 cb->args[1] = (*wdev)->identifier;
 563         } else {
 564                 /* subtract the 1 again here */
 565                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 566                 struct wireless_dev *tmp;
 567
 568                 if (!wiphy) {
 569                         err = -ENODEV;
 570                         goto out_unlock;
 571                 }
 572                 *rdev = wiphy_to_rdev(wiphy);
 573                 *wdev = NULL;
 574
 575                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 576                         if (tmp->identifier == cb->args[1]) {
 577                                 *wdev = tmp;
 578                                 break;
 579                         }
 580                 }
 581
 582                 if (!*wdev) {
 583                         err = -ENODEV;
 584                         goto out_unlock;
 585                 }
 586         }
 587
 588         return 0;
 589  out_unlock:
 590         rtnl_unlock();
 591         return err;
 592 }
 593
 594 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 595 {
 596         rtnl_unlock();
 597 }
 598
 599 /* IE validation */
 600 static bool is_valid_ie_attr(const struct nlattr *attr)
 601 {
 602         const u8 *pos;
 603         int len;
 604
 605         if (!attr)
 606                 return true;
 607
 608         pos = nla_data(attr);
 609         len = nla_len(attr);
 610
 611         while (len) {
 612                 u8 elemlen;
 613
 614                 if (len < 2)
 615                         return false;
 616                 len -= 2;
 617
 618                 elemlen = pos[1];
 619                 if (elemlen > len)
 620                         return false;
 621
 622                 len -= elemlen;
 623                 pos += 2 + elemlen;
 624         }
 625
 626         return true;
 627 }
 628
 629 /* message building helper */
 630 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 631                                    int flags, u8 cmd)
 632 {
 633         /* since there is no private header just add the generic one */
 634         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 635 }
 636
 637 static int nl80211_msg_put_channel(struct sk_buff *msg,
 638                                    struct ieee80211_channel *chan,
 639                                    bool large)
 640 {
 641         /* Some channels must be completely excluded from the
 642          * list to protect old user-space tools from breaking
 643          */
 644         if (!large && chan->flags &
 645             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 646                 return 0;
 647
 648         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 649                         chan->center_freq))
 650                 goto nla_put_failure;
 651
 652         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 653             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 654                 goto nla_put_failure;
 655         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 656                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 657                         goto nla_put_failure;
 658                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 659                         goto nla_put_failure;
 660         }
 661         if (chan->flags & IEEE80211_CHAN_RADAR) {
 662                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 663                         goto nla_put_failure;
 664                 if (large) {
 665                         u32 time;
 666
 667                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 668
 669                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 670                                         chan->dfs_state))
 671                                 goto nla_put_failure;
 672                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 673                                         time))
 674                                 goto nla_put_failure;
 675                         if (nla_put_u32(msg,
 676                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 677                                         chan->dfs_cac_ms))
 678                                 goto nla_put_failure;
 679                 }
 680         }
 681
 682         if (large) {
 683                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 684                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 685                         goto nla_put_failure;
 686                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 687                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 688                         goto nla_put_failure;
 689                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 690                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 691                         goto nla_put_failure;
 692                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 693                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 694                         goto nla_put_failure;
 695                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 696                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 697                         goto nla_put_failure;
 698                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 699                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 700                         goto nla_put_failure;
 701                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 702                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 703                         goto nla_put_failure;
 704                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 705                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 706                         goto nla_put_failure;
 707         }
 708
 709         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 710                         DBM_TO_MBM(chan->max_power)))
 711                 goto nla_put_failure;
 712
 713         return 0;
 714
 715  nla_put_failure:
 716         return -ENOBUFS;
 717 }
 718
 719 /* netlink command implementations */
 720
 721 struct key_parse {
 722         struct key_params p;
 723         int idx;
 724         int type;
 725         bool def, defmgmt;
 726         bool def_uni, def_multi;
 727 };
 728
 729 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 730 {
 731         struct nlattr *tb[NL80211_KEY_MAX + 1];
 732         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 733                                    nl80211_key_policy);
 734         if (err)
 735                 return err;
 736
 737         k->def = !!tb[NL80211_KEY_DEFAULT];
 738         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 739
 740         if (k->def) {
 741                 k->def_uni = true;
 742                 k->def_multi = true;
 743         }
 744         if (k->defmgmt)
 745                 k->def_multi = true;
 746
 747         if (tb[NL80211_KEY_IDX])
 748                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 749
 750         if (tb[NL80211_KEY_DATA]) {
 751                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 752                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 753         }
 754
 755         if (tb[NL80211_KEY_SEQ]) {
 756                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 757                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 758         }
 759
 760         if (tb[NL80211_KEY_CIPHER])
 761                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 762
 763         if (tb[NL80211_KEY_TYPE]) {
 764                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 765                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 766                         return -EINVAL;
 767         }
 768
 769         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 770                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 771
 772                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 773                                        tb[NL80211_KEY_DEFAULT_TYPES],
 774                                        nl80211_key_default_policy);
 775                 if (err)
 776                         return err;
 777
 778                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 779                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 780         }
 781
 782         return 0;
 783 }
 784
 785 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 786 {
 787         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 788                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 789                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 790         }
 791
 792         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 793                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 794                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 795         }
 796
 797         if (info->attrs[NL80211_ATTR_KEY_IDX])
 798                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 799
 800         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 801                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 802
 803         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 804         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 805
 806         if (k->def) {
 807                 k->def_uni = true;
 808                 k->def_multi = true;
 809         }
 810         if (k->defmgmt)
 811                 k->def_multi = true;
 812
 813         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 814                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 815                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 816                         return -EINVAL;
 817         }
 818
 819         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 820                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 821                 int err = nla_parse_nested(
 822                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 823                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 824                                 nl80211_key_default_policy);
 825                 if (err)
 826                         return err;
 827
 828                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 829                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 830         }
 831
 832         return 0;
 833 }
 834
 835 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 836 {
 837         int err;
 838
 839         memset(k, 0, sizeof(*k));
 840         k->idx = -1;
 841         k->type = -1;
 842
 843         if (info->attrs[NL80211_ATTR_KEY])
 844                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 845         else
 846                 err = nl80211_parse_key_old(info, k);
 847
 848         if (err)
 849                 return err;
 850
 851         if (k->def && k->defmgmt)
 852                 return -EINVAL;
 853
 854         if (k->defmgmt) {
 855                 if (k->def_uni || !k->def_multi)
 856                         return -EINVAL;
 857         }
 858
 859         if (k->idx != -1) {
 860                 if (k->defmgmt) {
 861                         if (k->idx < 4 || k->idx > 5)
 862                                 return -EINVAL;
 863                 } else if (k->def) {
 864                         if (k->idx < 0 || k->idx > 3)
 865                                 return -EINVAL;
 866                 } else {
 867                         if (k->idx < 0 || k->idx > 5)
 868                                 return -EINVAL;
 869                 }
 870         }
 871
 872         return 0;
 873 }
 874
 875 static struct cfg80211_cached_keys *
 876 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 877                        struct nlattr *keys, bool *no_ht)
 878 {
 879         struct key_parse parse;
 880         struct nlattr *key;
 881         struct cfg80211_cached_keys *result;
 882         int rem, err, def = 0;
 883         bool have_key = false;
 884
 885         nla_for_each_nested(key, keys, rem) {
 886                 have_key = true;
 887                 break;
 888         }
 889
 890         if (!have_key)
 891                 return NULL;
 892
 893         result = kzalloc(sizeof(*result), GFP_KERNEL);
 894         if (!result)
 895                 return ERR_PTR(-ENOMEM);
 896
 897         result->def = -1;
 898
 899         nla_for_each_nested(key, keys, rem) {
 900                 memset(&parse, 0, sizeof(parse));
 901                 parse.idx = -1;
 902
 903                 err = nl80211_parse_key_new(key, &parse);
 904                 if (err)
 905                         goto error;
 906                 err = -EINVAL;
 907                 if (!parse.p.key)
 908                         goto error;
 909                 if (parse.idx < 0 || parse.idx > 3)
 910                         goto error;
 911                 if (parse.def) {
 912                         if (def)
 913                                 goto error;
 914                         def = 1;
 915                         result->def = parse.idx;
 916                         if (!parse.def_uni || !parse.def_multi)
 917                                 goto error;
 918                 } else if (parse.defmgmt)
 919                         goto error;
 920                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 921                                                      parse.idx, false, NULL);
 922                 if (err)
 923                         goto error;
 924                 if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 925                     parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
 926                         err = -EINVAL;
 927                         goto error;
 928                 }
 929                 result->params[parse.idx].cipher = parse.p.cipher;
 930                 result->params[parse.idx].key_len = parse.p.key_len;
 931                 result->params[parse.idx].key = result->data[parse.idx];
 932                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 933
 934                 /* must be WEP key if we got here */
 935                 if (no_ht)
 936                         *no_ht = true;
 937         }
 938
 939         if (result->def < 0) {
 940                 err = -EINVAL;
 941                 goto error;
 942         }
 943
 944         return result;
 945  error:
 946         kfree(result);
 947         return ERR_PTR(err);
 948 }
 949
 950 static int nl80211_key_allowed(struct wireless_dev *wdev)
 951 {
 952         ASSERT_WDEV_LOCK(wdev);
 953
 954         switch (wdev->iftype) {
 955         case NL80211_IFTYPE_AP:
 956         case NL80211_IFTYPE_AP_VLAN:
 957         case NL80211_IFTYPE_P2P_GO:
 958         case NL80211_IFTYPE_MESH_POINT:
 959                 break;
 960         case NL80211_IFTYPE_ADHOC:
 961         case NL80211_IFTYPE_STATION:
 962         case NL80211_IFTYPE_P2P_CLIENT:
 963                 if (!wdev->current_bss)
 964                         return -ENOLINK;
 965                 break;
 966         case NL80211_IFTYPE_UNSPECIFIED:
 967         case NL80211_IFTYPE_OCB:
 968         case NL80211_IFTYPE_MONITOR:
 969         case NL80211_IFTYPE_NAN:
 970         case NL80211_IFTYPE_P2P_DEVICE:
 971         case NL80211_IFTYPE_WDS:
 972         case NUM_NL80211_IFTYPES:
 973                 return -EINVAL;
 974         }
 975
 976         return 0;
 977 }
 978
 979 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 980                                                         struct nlattr *tb)
 981 {
 982         struct ieee80211_channel *chan;
 983
 984         if (tb == NULL)
 985                 return NULL;
 986         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 987         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 988                 return NULL;
 989         return chan;
 990 }
 991
 992 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 993 {
 994         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 995         int i;
 996
 997         if (!nl_modes)
 998                 goto nla_put_failure;
 999
1000         i = 0;
1001         while (ifmodes) {
1002                 if ((ifmodes & 1) && nla_put_flag(msg, i))
1003                         goto nla_put_failure;
1004                 ifmodes >>= 1;
1005                 i++;
1006         }
1007
1008         nla_nest_end(msg, nl_modes);
1009         return 0;
1010
1011 nla_put_failure:
1012         return -ENOBUFS;
1013 }
1014
1015 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
1016                                           struct sk_buff *msg,
1017                                           bool large)
1018 {
1019         struct nlattr *nl_combis;
1020         int i, j;
1021
1022         nl_combis = nla_nest_start(msg,
1023                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
1024         if (!nl_combis)
1025                 goto nla_put_failure;
1026
1027         for (i = 0; i < wiphy->n_iface_combinations; i++) {
1028                 const struct ieee80211_iface_combination *c;
1029                 struct nlattr *nl_combi, *nl_limits;
1030
1031                 c = &wiphy->iface_combinations[i];
1032
1033                 nl_combi = nla_nest_start(msg, i + 1);
1034                 if (!nl_combi)
1035                         goto nla_put_failure;
1036
1037                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
1038                 if (!nl_limits)
1039                         goto nla_put_failure;
1040
1041                 for (j = 0; j < c->n_limits; j++) {
1042                         struct nlattr *nl_limit;
1043
1044                         nl_limit = nla_nest_start(msg, j + 1);
1045                         if (!nl_limit)
1046                                 goto nla_put_failure;
1047                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1048                                         c->limits[j].max))
1049                                 goto nla_put_failure;
1050                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1051                                                 c->limits[j].types))
1052                                 goto nla_put_failure;
1053                         nla_nest_end(msg, nl_limit);
1054                 }
1055
1056                 nla_nest_end(msg, nl_limits);
1057
1058                 if (c->beacon_int_infra_match &&
1059                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1060                         goto nla_put_failure;
1061                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1062                                 c->num_different_channels) ||
1063                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1064                                 c->max_interfaces))
1065                         goto nla_put_failure;
1066                 if (large &&
1067                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1068                                 c->radar_detect_widths) ||
1069                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1070                                 c->radar_detect_regions)))
1071                         goto nla_put_failure;
1072                 if (c->beacon_int_min_gcd &&
1073                     nla_put_u32(msg, NL80211_IFACE_COMB_BI_MIN_GCD,
1074                                 c->beacon_int_min_gcd))
1075                         goto nla_put_failure;
1076
1077                 nla_nest_end(msg, nl_combi);
1078         }
1079
1080         nla_nest_end(msg, nl_combis);
1081
1082         return 0;
1083 nla_put_failure:
1084         return -ENOBUFS;
1085 }
1086
1087 #ifdef CONFIG_PM
1088 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1089                                         struct sk_buff *msg)
1090 {
1091         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1092         struct nlattr *nl_tcp;
1093
1094         if (!tcp)
1095                 return 0;
1096
1097         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1098         if (!nl_tcp)
1099                 return -ENOBUFS;
1100
1101         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1102                         tcp->data_payload_max))
1103                 return -ENOBUFS;
1104
1105         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1106                         tcp->data_payload_max))
1107                 return -ENOBUFS;
1108
1109         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1110                 return -ENOBUFS;
1111
1112         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1113                                 sizeof(*tcp->tok), tcp->tok))
1114                 return -ENOBUFS;
1115
1116         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1117                         tcp->data_interval_max))
1118                 return -ENOBUFS;
1119
1120         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1121                         tcp->wake_payload_max))
1122                 return -ENOBUFS;
1123
1124         nla_nest_end(msg, nl_tcp);
1125         return 0;
1126 }
1127
1128 static int nl80211_send_wowlan(struct sk_buff *msg,
1129                                struct cfg80211_registered_device *rdev,
1130                                bool large)
1131 {
1132         struct nlattr *nl_wowlan;
1133
1134         if (!rdev->wiphy.wowlan)
1135                 return 0;
1136
1137         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1138         if (!nl_wowlan)
1139                 return -ENOBUFS;
1140
1141         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1142              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1143             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1144              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1145             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1146              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1147             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1148              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1149             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1150              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1151             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1152              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1153             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1154              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1155             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1156              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1157                 return -ENOBUFS;
1158
1159         if (rdev->wiphy.wowlan->n_patterns) {
1160                 struct nl80211_pattern_support pat = {
1161                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1162                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1163                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1164                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1165                 };
1166
1167                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1168                             sizeof(pat), &pat))
1169                         return -ENOBUFS;
1170         }
1171
1172         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1173             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1174                         rdev->wiphy.wowlan->max_nd_match_sets))
1175                 return -ENOBUFS;
1176
1177         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1178                 return -ENOBUFS;
1179
1180         nla_nest_end(msg, nl_wowlan);
1181
1182         return 0;
1183 }
1184 #endif
1185
1186 static int nl80211_send_coalesce(struct sk_buff *msg,
1187                                  struct cfg80211_registered_device *rdev)
1188 {
1189         struct nl80211_coalesce_rule_support rule;
1190
1191         if (!rdev->wiphy.coalesce)
1192                 return 0;
1193
1194         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1195         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1196         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1197         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1198         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1199         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1200
1201         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1202                 return -ENOBUFS;
1203
1204         return 0;
1205 }
1206
1207 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1208                                       struct ieee80211_supported_band *sband)
1209 {
1210         struct nlattr *nl_rates, *nl_rate;
1211         struct ieee80211_rate *rate;
1212         int i;
1213
1214         /* add HT info */
1215         if (sband->ht_cap.ht_supported &&
1216             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1217                      sizeof(sband->ht_cap.mcs),
1218                      &sband->ht_cap.mcs) ||
1219              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1220                          sband->ht_cap.cap) ||
1221              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1222                         sband->ht_cap.ampdu_factor) ||
1223              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1224                         sband->ht_cap.ampdu_density)))
1225                 return -ENOBUFS;
1226
1227         /* add VHT info */
1228         if (sband->vht_cap.vht_supported &&
1229             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1230                      sizeof(sband->vht_cap.vht_mcs),
1231                      &sband->vht_cap.vht_mcs) ||
1232              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1233                          sband->vht_cap.cap)))
1234                 return -ENOBUFS;
1235
1236         /* add bitrates */
1237         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1238         if (!nl_rates)
1239                 return -ENOBUFS;
1240
1241         for (i = 0; i < sband->n_bitrates; i++) {
1242                 nl_rate = nla_nest_start(msg, i);
1243                 if (!nl_rate)
1244                         return -ENOBUFS;
1245
1246                 rate = &sband->bitrates[i];
1247                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1248                                 rate->bitrate))
1249                         return -ENOBUFS;
1250                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1251                     nla_put_flag(msg,
1252                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1253                         return -ENOBUFS;
1254
1255                 nla_nest_end(msg, nl_rate);
1256         }
1257
1258         nla_nest_end(msg, nl_rates);
1259
1260         return 0;
1261 }
1262
1263 static int
1264 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1265                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1266 {
1267         u16 stypes;
1268         struct nlattr *nl_ftypes, *nl_ifs;
1269         enum nl80211_iftype ift;
1270         int i;
1271
1272         if (!mgmt_stypes)
1273                 return 0;
1274
1275         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1276         if (!nl_ifs)
1277                 return -ENOBUFS;
1278
1279         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1280                 nl_ftypes = nla_nest_start(msg, ift);
1281                 if (!nl_ftypes)
1282                         return -ENOBUFS;
1283                 i = 0;
1284                 stypes = mgmt_stypes[ift].tx;
1285                 while (stypes) {
1286                         if ((stypes & 1) &&
1287                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1288                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1289                                 return -ENOBUFS;
1290                         stypes >>= 1;
1291                         i++;
1292                 }
1293                 nla_nest_end(msg, nl_ftypes);
1294         }
1295
1296         nla_nest_end(msg, nl_ifs);
1297
1298         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1299         if (!nl_ifs)
1300                 return -ENOBUFS;
1301
1302         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1303                 nl_ftypes = nla_nest_start(msg, ift);
1304                 if (!nl_ftypes)
1305                         return -ENOBUFS;
1306                 i = 0;
1307                 stypes = mgmt_stypes[ift].rx;
1308                 while (stypes) {
1309                         if ((stypes & 1) &&
1310                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1311                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1312                                 return -ENOBUFS;
1313                         stypes >>= 1;
1314                         i++;
1315                 }
1316                 nla_nest_end(msg, nl_ftypes);
1317         }
1318         nla_nest_end(msg, nl_ifs);
1319
1320         return 0;
1321 }
1322
1323 #define CMD(op, n)                                                      \
1324          do {                                                           \
1325                 if (rdev->ops->op) {                                    \
1326                         i++;                                            \
1327                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n))     \
1328                                 goto nla_put_failure;                   \
1329                 }                                                       \
1330         } while (0)
1331
1332 static int nl80211_add_commands_unsplit(struct cfg80211_registered_device *rdev,
1333                                         struct sk_buff *msg)
1334 {
1335         int i = 0;
1336
1337         /*
1338          * do *NOT* add anything into this function, new things need to be
1339          * advertised only to new versions of userspace that can deal with
1340          * the split (and they can't possibly care about new features...
1341          */
1342         CMD(add_virtual_intf, NEW_INTERFACE);
1343         CMD(change_virtual_intf, SET_INTERFACE);
1344         CMD(add_key, NEW_KEY);
1345         CMD(start_ap, START_AP);
1346         CMD(add_station, NEW_STATION);
1347         CMD(add_mpath, NEW_MPATH);
1348         CMD(update_mesh_config, SET_MESH_CONFIG);
1349         CMD(change_bss, SET_BSS);
1350         CMD(auth, AUTHENTICATE);
1351         CMD(assoc, ASSOCIATE);
1352         CMD(deauth, DEAUTHENTICATE);
1353         CMD(disassoc, DISASSOCIATE);
1354         CMD(join_ibss, JOIN_IBSS);
1355         CMD(join_mesh, JOIN_MESH);
1356         CMD(set_pmksa, SET_PMKSA);
1357         CMD(del_pmksa, DEL_PMKSA);
1358         CMD(flush_pmksa, FLUSH_PMKSA);
1359         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1360                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1361         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1362         CMD(mgmt_tx, FRAME);
1363         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1364         if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1365                 i++;
1366                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1367                         goto nla_put_failure;
1368         }
1369         if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1370             rdev->ops->join_mesh) {
1371                 i++;
1372                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1373                         goto nla_put_failure;
1374         }
1375         CMD(set_wds_peer, SET_WDS_PEER);
1376         if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1377                 CMD(tdls_mgmt, TDLS_MGMT);
1378                 CMD(tdls_oper, TDLS_OPER);
1379         }
1380         if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1381                 CMD(sched_scan_start, START_SCHED_SCAN);
1382         CMD(probe_client, PROBE_CLIENT);
1383         CMD(set_noack_map, SET_NOACK_MAP);
1384         if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1385                 i++;
1386                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1387                         goto nla_put_failure;
1388         }
1389         CMD(start_p2p_device, START_P2P_DEVICE);
1390         CMD(set_mcast_rate, SET_MCAST_RATE);
1391 #ifdef CONFIG_NL80211_TESTMODE
1392         CMD(testmode_cmd, TESTMODE);
1393 #endif
1394
1395         if (rdev->ops->connect || rdev->ops->auth) {
1396                 i++;
1397                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1398                         goto nla_put_failure;
1399         }
1400
1401         if (rdev->ops->disconnect || rdev->ops->deauth) {
1402                 i++;
1403                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1404                         goto nla_put_failure;
1405         }
1406
1407         return i;
1408  nla_put_failure:
1409         return -ENOBUFS;
1410 }
1411
1412 struct nl80211_dump_wiphy_state {
1413         s64 filter_wiphy;
1414         long start;
1415         long split_start, band_start, chan_start, capa_start;
1416         bool split;
1417 };
1418
1419 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1420                               enum nl80211_commands cmd,
1421                               struct sk_buff *msg, u32 portid, u32 seq,
1422                               int flags, struct nl80211_dump_wiphy_state *state)
1423 {
1424         void *hdr;
1425         struct nlattr *nl_bands, *nl_band;
1426         struct nlattr *nl_freqs, *nl_freq;
1427         struct nlattr *nl_cmds;
1428         enum nl80211_band band;
1429         struct ieee80211_channel *chan;
1430         int i;
1431         const struct ieee80211_txrx_stypes *mgmt_stypes =
1432                                 rdev->wiphy.mgmt_stypes;
1433         u32 features;
1434
1435         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1436         if (!hdr)
1437                 return -ENOBUFS;
1438
1439         if (WARN_ON(!state))
1440                 return -EINVAL;
1441
1442         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1443             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1444                            wiphy_name(&rdev->wiphy)) ||
1445             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1446                         cfg80211_rdev_list_generation))
1447                 goto nla_put_failure;
1448
1449         if (cmd != NL80211_CMD_NEW_WIPHY)
1450                 goto finish;
1451
1452         switch (state->split_start) {
1453         case 0:
1454                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1455                                rdev->wiphy.retry_short) ||
1456                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1457                                rdev->wiphy.retry_long) ||
1458                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1459                                 rdev->wiphy.frag_threshold) ||
1460                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1461                                 rdev->wiphy.rts_threshold) ||
1462                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1463                                rdev->wiphy.coverage_class) ||
1464                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1465                                rdev->wiphy.max_scan_ssids) ||
1466                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1467                                rdev->wiphy.max_sched_scan_ssids) ||
1468                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1469                                 rdev->wiphy.max_scan_ie_len) ||
1470                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1471                                 rdev->wiphy.max_sched_scan_ie_len) ||
1472                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1473                                rdev->wiphy.max_match_sets) ||
1474                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1475                                 rdev->wiphy.max_sched_scan_plans) ||
1476                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1477                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1478                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1479                                 rdev->wiphy.max_sched_scan_plan_iterations))
1480                         goto nla_put_failure;
1481
1482                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1483                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1484                         goto nla_put_failure;
1485                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1486                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1487                         goto nla_put_failure;
1488                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1489                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1490                         goto nla_put_failure;
1491                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1492                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1493                         goto nla_put_failure;
1494                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1495                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1496                         goto nla_put_failure;
1497                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1498                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1499                         goto nla_put_failure;
1500                 state->split_start++;
1501                 if (state->split)
1502                         break;
1503         case 1:
1504                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1505                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1506                             rdev->wiphy.cipher_suites))
1507                         goto nla_put_failure;
1508
1509                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1510                                rdev->wiphy.max_num_pmkids))
1511                         goto nla_put_failure;
1512
1513                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1514                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1515                         goto nla_put_failure;
1516
1517                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1518                                 rdev->wiphy.available_antennas_tx) ||
1519                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1520                                 rdev->wiphy.available_antennas_rx))
1521                         goto nla_put_failure;
1522
1523                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1524                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1525                                 rdev->wiphy.probe_resp_offload))
1526                         goto nla_put_failure;
1527
1528                 if ((rdev->wiphy.available_antennas_tx ||
1529                      rdev->wiphy.available_antennas_rx) &&
1530                     rdev->ops->get_antenna) {
1531                         u32 tx_ant = 0, rx_ant = 0;
1532                         int res;
1533
1534                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1535                         if (!res) {
1536                                 if (nla_put_u32(msg,
1537                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1538                                                 tx_ant) ||
1539                                     nla_put_u32(msg,
1540                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1541                                                 rx_ant))
1542                                         goto nla_put_failure;
1543                         }
1544                 }
1545
1546                 state->split_start++;
1547                 if (state->split)
1548                         break;
1549         case 2:
1550                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1551                                         rdev->wiphy.interface_modes))
1552                                 goto nla_put_failure;
1553                 state->split_start++;
1554                 if (state->split)
1555                         break;
1556         case 3:
1557                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1558                 if (!nl_bands)
1559                         goto nla_put_failure;
1560
1561                 for (band = state->band_start;
1562                      band < NUM_NL80211_BANDS; band++) {
1563                         struct ieee80211_supported_band *sband;
1564
1565                         sband = rdev->wiphy.bands[band];
1566
1567                         if (!sband)
1568                                 continue;
1569
1570                         nl_band = nla_nest_start(msg, band);
1571                         if (!nl_band)
1572                                 goto nla_put_failure;
1573
1574                         switch (state->chan_start) {
1575                         case 0:
1576                                 if (nl80211_send_band_rateinfo(msg, sband))
1577                                         goto nla_put_failure;
1578                                 state->chan_start++;
1579                                 if (state->split)
1580                                         break;
1581                         default:
1582                                 /* add frequencies */
1583                                 nl_freqs = nla_nest_start(
1584                                         msg, NL80211_BAND_ATTR_FREQS);
1585                                 if (!nl_freqs)
1586                                         goto nla_put_failure;
1587
1588                                 for (i = state->chan_start - 1;
1589                                      i < sband->n_channels;
1590                                      i++) {
1591                                         nl_freq = nla_nest_start(msg, i);
1592                                         if (!nl_freq)
1593                                                 goto nla_put_failure;
1594
1595                                         chan = &sband->channels[i];
1596
1597                                         if (nl80211_msg_put_channel(
1598                                                         msg, chan,
1599                                                         state->split))
1600                                                 goto nla_put_failure;
1601
1602                                         nla_nest_end(msg, nl_freq);
1603                                         if (state->split)
1604                                                 break;
1605                                 }
1606                                 if (i < sband->n_channels)
1607                                         state->chan_start = i + 2;
1608                                 else
1609                                         state->chan_start = 0;
1610                                 nla_nest_end(msg, nl_freqs);
1611                         }
1612
1613                         nla_nest_end(msg, nl_band);
1614
1615                         if (state->split) {
1616                                 /* start again here */
1617                                 if (state->chan_start)
1618                                         band--;
1619                                 break;
1620                         }
1621                 }
1622                 nla_nest_end(msg, nl_bands);
1623
1624                 if (band < NUM_NL80211_BANDS)
1625                         state->band_start = band + 1;
1626                 else
1627                         state->band_start = 0;
1628
1629                 /* if bands & channels are done, continue outside */
1630                 if (state->band_start == 0 && state->chan_start == 0)
1631                         state->split_start++;
1632                 if (state->split)
1633                         break;
1634         case 4:
1635                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1636                 if (!nl_cmds)
1637                         goto nla_put_failure;
1638
1639                 i = nl80211_add_commands_unsplit(rdev, msg);
1640                 if (i < 0)
1641                         goto nla_put_failure;
1642                 if (state->split) {
1643                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1644                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1645                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1646                                 CMD(channel_switch, CHANNEL_SWITCH);
1647                         CMD(set_qos_map, SET_QOS_MAP);
1648                         if (rdev->wiphy.features &
1649                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1650                                 CMD(add_tx_ts, ADD_TX_TS);
1651                         CMD(set_multicast_to_unicast, SET_MULTICAST_TO_UNICAST);
1652                         CMD(update_connect_params, UPDATE_CONNECT_PARAMS);
1653                 }
1654 #undef CMD
1655
1656                 nla_nest_end(msg, nl_cmds);
1657                 state->split_start++;
1658                 if (state->split)
1659                         break;
1660         case 5:
1661                 if (rdev->ops->remain_on_channel &&
1662                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1663                     nla_put_u32(msg,
1664                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1665                                 rdev->wiphy.max_remain_on_channel_duration))
1666                         goto nla_put_failure;
1667
1668                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1669                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1670                         goto nla_put_failure;
1671
1672                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1673                         goto nla_put_failure;
1674                 state->split_start++;
1675                 if (state->split)
1676                         break;
1677         case 6:
1678 #ifdef CONFIG_PM
1679                 if (nl80211_send_wowlan(msg, rdev, state->split))
1680                         goto nla_put_failure;
1681                 state->split_start++;
1682                 if (state->split)
1683                         break;
1684 #else
1685                 state->split_start++;
1686 #endif
1687         case 7:
1688                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1689                                         rdev->wiphy.software_iftypes))
1690                         goto nla_put_failure;
1691
1692                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1693                                                    state->split))
1694                         goto nla_put_failure;
1695
1696                 state->split_start++;
1697                 if (state->split)
1698                         break;
1699         case 8:
1700                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1701                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1702                                 rdev->wiphy.ap_sme_capa))
1703                         goto nla_put_failure;
1704
1705                 features = rdev->wiphy.features;
1706                 /*
1707                  * We can only add the per-channel limit information if the
1708                  * dump is split, otherwise it makes it too big. Therefore
1709                  * only advertise it in that case.
1710                  */
1711                 if (state->split)
1712                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1713                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1714                         goto nla_put_failure;
1715
1716                 if (rdev->wiphy.ht_capa_mod_mask &&
1717                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1718                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1719                             rdev->wiphy.ht_capa_mod_mask))
1720                         goto nla_put_failure;
1721
1722                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1723                     rdev->wiphy.max_acl_mac_addrs &&
1724                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1725                                 rdev->wiphy.max_acl_mac_addrs))
1726                         goto nla_put_failure;
1727
1728                 /*
1729                  * Any information below this point is only available to
1730                  * applications that can deal with it being split. This
1731                  * helps ensure that newly added capabilities don't break
1732                  * older tools by overrunning their buffers.
1733                  *
1734                  * We still increment split_start so that in the split
1735                  * case we'll continue with more data in the next round,
1736                  * but break unconditionally so unsplit data stops here.
1737                  */
1738                 state->split_start++;
1739                 break;
1740         case 9:
1741                 if (rdev->wiphy.extended_capabilities &&
1742                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1743                              rdev->wiphy.extended_capabilities_len,
1744                              rdev->wiphy.extended_capabilities) ||
1745                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1746                              rdev->wiphy.extended_capabilities_len,
1747                              rdev->wiphy.extended_capabilities_mask)))
1748                         goto nla_put_failure;
1749
1750                 if (rdev->wiphy.vht_capa_mod_mask &&
1751                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1752                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1753                             rdev->wiphy.vht_capa_mod_mask))
1754                         goto nla_put_failure;
1755
1756                 state->split_start++;
1757                 break;
1758         case 10:
1759                 if (nl80211_send_coalesce(msg, rdev))
1760                         goto nla_put_failure;
1761
1762                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1763                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1764                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1765                         goto nla_put_failure;
1766
1767                 if (rdev->wiphy.max_ap_assoc_sta &&
1768                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1769                                 rdev->wiphy.max_ap_assoc_sta))
1770                         goto nla_put_failure;
1771
1772                 state->split_start++;
1773                 break;
1774         case 11:
1775                 if (rdev->wiphy.n_vendor_commands) {
1776                         const struct nl80211_vendor_cmd_info *info;
1777                         struct nlattr *nested;
1778
1779                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1780                         if (!nested)
1781                                 goto nla_put_failure;
1782
1783                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1784                                 info = &rdev->wiphy.vendor_commands[i].info;
1785                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1786                                         goto nla_put_failure;
1787                         }
1788                         nla_nest_end(msg, nested);
1789                 }
1790
1791                 if (rdev->wiphy.n_vendor_events) {
1792                         const struct nl80211_vendor_cmd_info *info;
1793                         struct nlattr *nested;
1794
1795                         nested = nla_nest_start(msg,
1796                                                 NL80211_ATTR_VENDOR_EVENTS);
1797                         if (!nested)
1798                                 goto nla_put_failure;
1799
1800                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1801                                 info = &rdev->wiphy.vendor_events[i];
1802                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1803                                         goto nla_put_failure;
1804                         }
1805                         nla_nest_end(msg, nested);
1806                 }
1807                 state->split_start++;
1808                 break;
1809         case 12:
1810                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1811                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1812                                rdev->wiphy.max_num_csa_counters))
1813                         goto nla_put_failure;
1814
1815                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1816                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1817                         goto nla_put_failure;
1818
1819                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1820                             sizeof(rdev->wiphy.ext_features),
1821                             rdev->wiphy.ext_features))
1822                         goto nla_put_failure;
1823
1824                 if (rdev->wiphy.bss_select_support) {
1825                         struct nlattr *nested;
1826                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1827
1828                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1829                         if (!nested)
1830                                 goto nla_put_failure;
1831
1832                         i = 0;
1833                         while (bss_select_support) {
1834                                 if ((bss_select_support & 1) &&
1835                                     nla_put_flag(msg, i))
1836                                         goto nla_put_failure;
1837                                 i++;
1838                                 bss_select_support >>= 1;
1839                         }
1840                         nla_nest_end(msg, nested);
1841                 }
1842
1843                 state->split_start++;
1844                 break;
1845         case 13:
1846                 if (rdev->wiphy.num_iftype_ext_capab &&
1847                     rdev->wiphy.iftype_ext_capab) {
1848                         struct nlattr *nested_ext_capab, *nested;
1849
1850                         nested = nla_nest_start(msg,
1851                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1852                         if (!nested)
1853                                 goto nla_put_failure;
1854
1855                         for (i = state->capa_start;
1856                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1857                                 const struct wiphy_iftype_ext_capab *capab;
1858
1859                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1860
1861                                 nested_ext_capab = nla_nest_start(msg, i);
1862                                 if (!nested_ext_capab ||
1863                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1864                                                 capab->iftype) ||
1865                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1866                                             capab->extended_capabilities_len,
1867                                             capab->extended_capabilities) ||
1868                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1869                                             capab->extended_capabilities_len,
1870                                             capab->extended_capabilities_mask))
1871                                         goto nla_put_failure;
1872
1873                                 nla_nest_end(msg, nested_ext_capab);
1874                                 if (state->split)
1875                                         break;
1876                         }
1877                         nla_nest_end(msg, nested);
1878                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1879                                 state->capa_start = i + 1;
1880                                 break;
1881                         }
1882                 }
1883
1884                 /* done */
1885                 state->split_start = 0;
1886                 break;
1887         }
1888  finish:
1889         genlmsg_end(msg, hdr);
1890         return 0;
1891
1892  nla_put_failure:
1893         genlmsg_cancel(msg, hdr);
1894         return -EMSGSIZE;
1895 }
1896
1897 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1898                                     struct netlink_callback *cb,
1899                                     struct nl80211_dump_wiphy_state *state)
1900 {
1901         struct nlattr **tb = genl_family_attrbuf(&nl80211_fam);
1902         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1903                               tb, nl80211_fam.maxattr, nl80211_policy);
1904         /* ignore parse errors for backward compatibility */
1905         if (ret)
1906                 return 0;
1907
1908         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1909         if (tb[NL80211_ATTR_WIPHY])
1910                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1911         if (tb[NL80211_ATTR_WDEV])
1912                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1913         if (tb[NL80211_ATTR_IFINDEX]) {
1914                 struct net_device *netdev;
1915                 struct cfg80211_registered_device *rdev;
1916                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1917
1918                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1919                 if (!netdev)
1920                         return -ENODEV;
1921                 if (netdev->ieee80211_ptr) {
1922                         rdev = wiphy_to_rdev(
1923                                 netdev->ieee80211_ptr->wiphy);
1924                         state->filter_wiphy = rdev->wiphy_idx;
1925                 }
1926         }
1927
1928         return 0;
1929 }
1930
1931 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1932 {
1933         int idx = 0, ret;
1934         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1935         struct cfg80211_registered_device *rdev;
1936
1937         rtnl_lock();
1938         if (!state) {
1939                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1940                 if (!state) {
1941                         rtnl_unlock();
1942                         return -ENOMEM;
1943                 }
1944                 state->filter_wiphy = -1;
1945                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1946                 if (ret) {
1947                         kfree(state);
1948                         rtnl_unlock();
1949                         return ret;
1950                 }
1951                 cb->args[0] = (long)state;
1952         }
1953
1954         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1955                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1956                         continue;
1957                 if (++idx <= state->start)
1958                         continue;
1959                 if (state->filter_wiphy != -1 &&
1960                     state->filter_wiphy != rdev->wiphy_idx)
1961                         continue;
1962                 /* attempt to fit multiple wiphy data chunks into the skb */
1963                 do {
1964                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1965                                                  skb,
1966                                                  NETLINK_CB(cb->skb).portid,
1967                                                  cb->nlh->nlmsg_seq,
1968                                                  NLM_F_MULTI, state);
1969                         if (ret < 0) {
1970                                 /*
1971                                  * If sending the wiphy data didn't fit (ENOBUFS
1972                                  * or EMSGSIZE returned), this SKB is still
1973                                  * empty (so it's not too big because another
1974                                  * wiphy dataset is already in the skb) and
1975                                  * we've not tried to adjust the dump allocation
1976                                  * yet ... then adjust the alloc size to be
1977                                  * bigger, and return 1 but with the empty skb.
1978                                  * This results in an empty message being RX'ed
1979                                  * in userspace, but that is ignored.
1980                                  *
1981                                  * We can then retry with the larger buffer.
1982                                  */
1983                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1984                                     !skb->len && !state->split &&
1985                                     cb->min_dump_alloc < 4096) {
1986                                         cb->min_dump_alloc = 4096;
1987                                         state->split_start = 0;
1988                                         rtnl_unlock();
1989                                         return 1;
1990                                 }
1991                                 idx--;
1992                                 break;
1993                         }
1994                 } while (state->split_start > 0);
1995                 break;
1996         }
1997         rtnl_unlock();
1998
1999         state->start = idx;
2000
2001         return skb->len;
2002 }
2003
2004 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
2005 {
2006         kfree((void *)cb->args[0]);
2007         return 0;
2008 }
2009
2010 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
2011 {
2012         struct sk_buff *msg;
2013         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2014         struct nl80211_dump_wiphy_state state = {};
2015
2016         msg = nlmsg_new(4096, GFP_KERNEL);
2017         if (!msg)
2018                 return -ENOMEM;
2019
2020         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
2021                                info->snd_portid, info->snd_seq, 0,
2022                                &state) < 0) {
2023                 nlmsg_free(msg);
2024                 return -ENOBUFS;
2025         }
2026
2027         return genlmsg_reply(msg, info);
2028 }
2029
2030 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
2031         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
2032         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
2033         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
2034         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
2035         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
2036 };
2037
2038 static int parse_txq_params(struct nlattr *tb[],
2039                             struct ieee80211_txq_params *txq_params)
2040 {
2041         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
2042             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
2043             !tb[NL80211_TXQ_ATTR_AIFS])
2044                 return -EINVAL;
2045
2046         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
2047         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
2048         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
2049         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
2050         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
2051
2052         if (txq_params->ac >= NL80211_NUM_ACS)
2053                 return -EINVAL;
2054
2055         return 0;
2056 }
2057
2058 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
2059 {
2060         /*
2061          * You can only set the channel explicitly for WDS interfaces,
2062          * all others have their channel managed via their respective
2063          * "establish a connection" command (connect, join, ...)
2064          *
2065          * For AP/GO and mesh mode, the channel can be set with the
2066          * channel userspace API, but is only stored and passed to the
2067          * low-level driver when the AP starts or the mesh is joined.
2068          * This is for backward compatibility, userspace can also give
2069          * the channel in the start-ap or join-mesh commands instead.
2070          *
2071          * Monitors are special as they are normally slaved to
2072          * whatever else is going on, so they have their own special
2073          * operation to set the monitor channel if possible.
2074          */
2075         return !wdev ||
2076                 wdev->iftype == NL80211_IFTYPE_AP ||
2077                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2078                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2079                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2080 }
2081
2082 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2083                                  struct genl_info *info,
2084                                  struct cfg80211_chan_def *chandef)
2085 {
2086         u32 control_freq;
2087
2088         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2089                 return -EINVAL;
2090
2091         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2092
2093         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2094         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2095         chandef->center_freq1 = control_freq;
2096         chandef->center_freq2 = 0;
2097
2098         /* Primary channel not allowed */
2099         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2100                 return -EINVAL;
2101
2102         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2103                 enum nl80211_channel_type chantype;
2104
2105                 chantype = nla_get_u32(
2106                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2107
2108                 switch (chantype) {
2109                 case NL80211_CHAN_NO_HT:
2110                 case NL80211_CHAN_HT20:
2111                 case NL80211_CHAN_HT40PLUS:
2112                 case NL80211_CHAN_HT40MINUS:
2113                         cfg80211_chandef_create(chandef, chandef->chan,
2114                                                 chantype);
2115                         break;
2116                 default:
2117                         return -EINVAL;
2118                 }
2119         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2120                 chandef->width =
2121                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2122                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2123                         chandef->center_freq1 =
2124                                 nla_get_u32(
2125                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2126                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2127                         chandef->center_freq2 =
2128                                 nla_get_u32(
2129                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2130         }
2131
2132         if (!cfg80211_chandef_valid(chandef))
2133                 return -EINVAL;
2134
2135         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2136                                      IEEE80211_CHAN_DISABLED))
2137                 return -EINVAL;
2138
2139         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2140              chandef->width == NL80211_CHAN_WIDTH_10) &&
2141             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2142                 return -EINVAL;
2143
2144         return 0;
2145 }
2146
2147 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2148                                  struct net_device *dev,
2149                                  struct genl_info *info)
2150 {
2151         struct cfg80211_chan_def chandef;
2152         int result;
2153         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2154         struct wireless_dev *wdev = NULL;
2155
2156         if (dev)
2157                 wdev = dev->ieee80211_ptr;
2158         if (!nl80211_can_set_dev_channel(wdev))
2159                 return -EOPNOTSUPP;
2160         if (wdev)
2161                 iftype = wdev->iftype;
2162
2163         result = nl80211_parse_chandef(rdev, info, &chandef);
2164         if (result)
2165                 return result;
2166
2167         switch (iftype) {
2168         case NL80211_IFTYPE_AP:
2169         case NL80211_IFTYPE_P2P_GO:
2170                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2171                                                    iftype)) {
2172                         result = -EINVAL;
2173                         break;
2174                 }
2175                 if (wdev->beacon_interval) {
2176                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2177                             !(rdev->wiphy.features &
2178                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2179                                 result = -EBUSY;
2180                                 break;
2181                         }
2182
2183                         /* Only allow dynamic channel width changes */
2184                         if (chandef.chan != wdev->preset_chandef.chan) {
2185                                 result = -EBUSY;
2186                                 break;
2187                         }
2188                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2189                         if (result)
2190                                 break;
2191                 }
2192                 wdev->preset_chandef = chandef;
2193                 result = 0;
2194                 break;
2195         case NL80211_IFTYPE_MESH_POINT:
2196                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2197                 break;
2198         case NL80211_IFTYPE_MONITOR:
2199                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2200                 break;
2201         default:
2202                 result = -EINVAL;
2203         }
2204
2205         return result;
2206 }
2207
2208 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2209 {
2210         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2211         struct net_device *netdev = info->user_ptr[1];
2212
2213         return __nl80211_set_channel(rdev, netdev, info);
2214 }
2215
2216 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2217 {
2218         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2219         struct net_device *dev = info->user_ptr[1];
2220         struct wireless_dev *wdev = dev->ieee80211_ptr;
2221         const u8 *bssid;
2222
2223         if (!info->attrs[NL80211_ATTR_MAC])
2224                 return -EINVAL;
2225
2226         if (netif_running(dev))
2227                 return -EBUSY;
2228
2229         if (!rdev->ops->set_wds_peer)
2230                 return -EOPNOTSUPP;
2231
2232         if (wdev->iftype != NL80211_IFTYPE_WDS)
2233                 return -EOPNOTSUPP;
2234
2235         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2236         return rdev_set_wds_peer(rdev, dev, bssid);
2237 }
2238
2239 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2240 {
2241         struct cfg80211_registered_device *rdev;
2242         struct net_device *netdev = NULL;
2243         struct wireless_dev *wdev;
2244         int result = 0, rem_txq_params = 0;
2245         struct nlattr *nl_txq_params;
2246         u32 changed;
2247         u8 retry_short = 0, retry_long = 0;
2248         u32 frag_threshold = 0, rts_threshold = 0;
2249         u8 coverage_class = 0;
2250
2251         ASSERT_RTNL();
2252
2253         /*
2254          * Try to find the wiphy and netdev. Normally this
2255          * function shouldn't need the netdev, but this is
2256          * done for backward compatibility -- previously
2257          * setting the channel was done per wiphy, but now
2258          * it is per netdev. Previous userland like hostapd
2259          * also passed a netdev to set_wiphy, so that it is
2260          * possible to let that go to the right netdev!
2261          */
2262
2263         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2264                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2265
2266                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2267                 if (netdev && netdev->ieee80211_ptr)
2268                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2269                 else
2270                         netdev = NULL;
2271         }
2272
2273         if (!netdev) {
2274                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2275                                                   info->attrs);
2276                 if (IS_ERR(rdev))
2277                         return PTR_ERR(rdev);
2278                 wdev = NULL;
2279                 netdev = NULL;
2280                 result = 0;
2281         } else
2282                 wdev = netdev->ieee80211_ptr;
2283
2284         /*
2285          * end workaround code, by now the rdev is available
2286          * and locked, and wdev may or may not be NULL.
2287          */
2288
2289         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2290                 result = cfg80211_dev_rename(
2291                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2292
2293         if (result)
2294                 return result;
2295
2296         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2297                 struct ieee80211_txq_params txq_params;
2298                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2299
2300                 if (!rdev->ops->set_txq_params)
2301                         return -EOPNOTSUPP;
2302
2303                 if (!netdev)
2304                         return -EINVAL;
2305
2306                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2307                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2308                         return -EINVAL;
2309
2310                 if (!netif_running(netdev))
2311                         return -ENETDOWN;
2312
2313                 nla_for_each_nested(nl_txq_params,
2314                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2315                                     rem_txq_params) {
2316                         result = nla_parse_nested(tb, NL80211_TXQ_ATTR_MAX,
2317                                                   nl_txq_params,
2318                                                   txq_params_policy);
2319                         if (result)
2320                                 return result;
2321                         result = parse_txq_params(tb, &txq_params);
2322                         if (result)
2323                                 return result;
2324
2325                         result = rdev_set_txq_params(rdev, netdev,
2326                                                      &txq_params);
2327                         if (result)
2328                                 return result;
2329                 }
2330         }
2331
2332         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2333                 result = __nl80211_set_channel(
2334                         rdev,
2335                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2336                         info);
2337                 if (result)
2338                         return result;
2339         }
2340
2341         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2342                 struct wireless_dev *txp_wdev = wdev;
2343                 enum nl80211_tx_power_setting type;
2344                 int idx, mbm = 0;
2345
2346                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2347                         txp_wdev = NULL;
2348
2349                 if (!rdev->ops->set_tx_power)
2350                         return -EOPNOTSUPP;
2351
2352                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2353                 type = nla_get_u32(info->attrs[idx]);
2354
2355                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2356                     (type != NL80211_TX_POWER_AUTOMATIC))
2357                         return -EINVAL;
2358
2359                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2360                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2361                         mbm = nla_get_u32(info->attrs[idx]);
2362                 }
2363
2364                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2365                 if (result)
2366                         return result;
2367         }
2368
2369         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2370             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2371                 u32 tx_ant, rx_ant;
2372
2373                 if ((!rdev->wiphy.available_antennas_tx &&
2374                      !rdev->wiphy.available_antennas_rx) ||
2375                     !rdev->ops->set_antenna)
2376                         return -EOPNOTSUPP;
2377
2378                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2379                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2380
2381                 /* reject antenna configurations which don't match the
2382                  * available antenna masks, except for the "all" mask */
2383                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2384                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2385                         return -EINVAL;
2386
2387                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2388                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2389
2390                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2391                 if (result)
2392                         return result;
2393         }
2394
2395         changed = 0;
2396
2397         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2398                 retry_short = nla_get_u8(
2399                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2400                 if (retry_short == 0)
2401                         return -EINVAL;
2402
2403                 changed |= WIPHY_PARAM_RETRY_SHORT;
2404         }
2405
2406         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2407                 retry_long = nla_get_u8(
2408                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2409                 if (retry_long == 0)
2410                         return -EINVAL;
2411
2412                 changed |= WIPHY_PARAM_RETRY_LONG;
2413         }
2414
2415         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2416                 frag_threshold = nla_get_u32(
2417                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2418                 if (frag_threshold < 256)
2419                         return -EINVAL;
2420
2421                 if (frag_threshold != (u32) -1) {
2422                         /*
2423                          * Fragments (apart from the last one) are required to
2424                          * have even length. Make the fragmentation code
2425                          * simpler by stripping LSB should someone try to use
2426                          * odd threshold value.
2427                          */
2428                         frag_threshold &= ~0x1;
2429                 }
2430                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2431         }
2432
2433         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2434                 rts_threshold = nla_get_u32(
2435                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2436                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2437         }
2438
2439         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2440                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2441                         return -EINVAL;
2442
2443                 coverage_class = nla_get_u8(
2444                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2445                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2446         }
2447
2448         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2449                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2450                         return -EOPNOTSUPP;
2451
2452                 changed |= WIPHY_PARAM_DYN_ACK;
2453         }
2454
2455         if (changed) {
2456                 u8 old_retry_short, old_retry_long;
2457                 u32 old_frag_threshold, old_rts_threshold;
2458                 u8 old_coverage_class;
2459
2460                 if (!rdev->ops->set_wiphy_params)
2461                         return -EOPNOTSUPP;
2462
2463                 old_retry_short = rdev->wiphy.retry_short;
2464                 old_retry_long = rdev->wiphy.retry_long;
2465                 old_frag_threshold = rdev->wiphy.frag_threshold;
2466                 old_rts_threshold = rdev->wiphy.rts_threshold;
2467                 old_coverage_class = rdev->wiphy.coverage_class;
2468
2469                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2470                         rdev->wiphy.retry_short = retry_short;
2471                 if (changed & WIPHY_PARAM_RETRY_LONG)
2472                         rdev->wiphy.retry_long = retry_long;
2473                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2474                         rdev->wiphy.frag_threshold = frag_threshold;
2475                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2476                         rdev->wiphy.rts_threshold = rts_threshold;
2477                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2478                         rdev->wiphy.coverage_class = coverage_class;
2479
2480                 result = rdev_set_wiphy_params(rdev, changed);
2481                 if (result) {
2482                         rdev->wiphy.retry_short = old_retry_short;
2483                         rdev->wiphy.retry_long = old_retry_long;
2484                         rdev->wiphy.frag_threshold = old_frag_threshold;
2485                         rdev->wiphy.rts_threshold = old_rts_threshold;
2486                         rdev->wiphy.coverage_class = old_coverage_class;
2487                         return result;
2488                 }
2489         }
2490         return 0;
2491 }
2492
2493 static inline u64 wdev_id(struct wireless_dev *wdev)
2494 {
2495         return (u64)wdev->identifier |
2496                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2497 }
2498
2499 static int nl80211_send_chandef(struct sk_buff *msg,
2500                                 const struct cfg80211_chan_def *chandef)
2501 {
2502         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2503                 return -EINVAL;
2504
2505         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2506                         chandef->chan->center_freq))
2507                 return -ENOBUFS;
2508         switch (chandef->width) {
2509         case NL80211_CHAN_WIDTH_20_NOHT:
2510         case NL80211_CHAN_WIDTH_20:
2511         case NL80211_CHAN_WIDTH_40:
2512                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2513                                 cfg80211_get_chandef_type(chandef)))
2514                         return -ENOBUFS;
2515                 break;
2516         default:
2517                 break;
2518         }
2519         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2520                 return -ENOBUFS;
2521         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2522                 return -ENOBUFS;
2523         if (chandef->center_freq2 &&
2524             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2525                 return -ENOBUFS;
2526         return 0;
2527 }
2528
2529 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2530                               struct cfg80211_registered_device *rdev,
2531                               struct wireless_dev *wdev, bool removal)
2532 {
2533         struct net_device *dev = wdev->netdev;
2534         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2535         void *hdr;
2536
2537         if (removal)
2538                 cmd = NL80211_CMD_DEL_INTERFACE;
2539
2540         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2541         if (!hdr)
2542                 return -1;
2543
2544         if (dev &&
2545             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2546              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2547                 goto nla_put_failure;
2548
2549         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2550             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2551             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2552                               NL80211_ATTR_PAD) ||
2553             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2554             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2555                         rdev->devlist_generation ^
2556                         (cfg80211_rdev_list_generation << 2)))
2557                 goto nla_put_failure;
2558
2559         if (rdev->ops->get_channel) {
2560                 int ret;
2561                 struct cfg80211_chan_def chandef;
2562
2563                 ret = rdev_get_channel(rdev, wdev, &chandef);
2564                 if (ret == 0) {
2565                         if (nl80211_send_chandef(msg, &chandef))
2566                                 goto nla_put_failure;
2567                 }
2568         }
2569
2570         if (rdev->ops->get_tx_power) {
2571                 int dbm, ret;
2572
2573                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2574                 if (ret == 0 &&
2575                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2576                                 DBM_TO_MBM(dbm)))
2577                         goto nla_put_failure;
2578         }
2579
2580         if (wdev->ssid_len) {
2581                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2582                         goto nla_put_failure;
2583         }
2584
2585         genlmsg_end(msg, hdr);
2586         return 0;
2587
2588  nla_put_failure:
2589         genlmsg_cancel(msg, hdr);
2590         return -EMSGSIZE;
2591 }
2592
2593 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2594 {
2595         int wp_idx = 0;
2596         int if_idx = 0;
2597         int wp_start = cb->args[0];
2598         int if_start = cb->args[1];
2599         int filter_wiphy = -1;
2600         struct cfg80211_registered_device *rdev;
2601         struct wireless_dev *wdev;
2602
2603         rtnl_lock();
2604         if (!cb->args[2]) {
2605                 struct nl80211_dump_wiphy_state state = {
2606                         .filter_wiphy = -1,
2607                 };
2608                 int ret;
2609
2610                 ret = nl80211_dump_wiphy_parse(skb, cb, &state);
2611                 if (ret)
2612                         return ret;
2613
2614                 filter_wiphy = state.filter_wiphy;
2615
2616                 /*
2617                  * if filtering, set cb->args[2] to +1 since 0 is the default
2618                  * value needed to determine that parsing is necessary.
2619                  */
2620                 if (filter_wiphy >= 0)
2621                         cb->args[2] = filter_wiphy + 1;
2622                 else
2623                         cb->args[2] = -1;
2624         } else if (cb->args[2] > 0) {
2625                 filter_wiphy = cb->args[2] - 1;
2626         }
2627
2628         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2629                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2630                         continue;
2631                 if (wp_idx < wp_start) {
2632                         wp_idx++;
2633                         continue;
2634                 }
2635
2636                 if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
2637                         continue;
2638
2639                 if_idx = 0;
2640
2641                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2642                         if (if_idx < if_start) {
2643                                 if_idx++;
2644                                 continue;
2645                         }
2646                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2647                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2648                                                rdev, wdev, false) < 0) {
2649                                 goto out;
2650                         }
2651                         if_idx++;
2652                 }
2653
2654                 wp_idx++;
2655         }
2656  out:
2657         rtnl_unlock();
2658
2659         cb->args[0] = wp_idx;
2660         cb->args[1] = if_idx;
2661
2662         return skb->len;
2663 }
2664
2665 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2666 {
2667         struct sk_buff *msg;
2668         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2669         struct wireless_dev *wdev = info->user_ptr[1];
2670
2671         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2672         if (!msg)
2673                 return -ENOMEM;
2674
2675         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2676                                rdev, wdev, false) < 0) {
2677                 nlmsg_free(msg);
2678                 return -ENOBUFS;
2679         }
2680
2681         return genlmsg_reply(msg, info);
2682 }
2683
2684 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2685         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2686         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2687         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2688         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2689         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2690         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2691 };
2692
2693 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2694 {
2695         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2696         int flag;
2697
2698         *mntrflags = 0;
2699
2700         if (!nla)
2701                 return -EINVAL;
2702
2703         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2704                              nla, mntr_flags_policy))
2705                 return -EINVAL;
2706
2707         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2708                 if (flags[flag])
2709                         *mntrflags |= (1<<flag);
2710
2711         return 0;
2712 }
2713
2714 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2715                                struct net_device *netdev, u8 use_4addr,
2716                                enum nl80211_iftype iftype)
2717 {
2718         if (!use_4addr) {
2719                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2720                         return -EBUSY;
2721                 return 0;
2722         }
2723
2724         switch (iftype) {
2725         case NL80211_IFTYPE_AP_VLAN:
2726                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2727                         return 0;
2728                 break;
2729         case NL80211_IFTYPE_STATION:
2730                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2731                         return 0;
2732                 break;
2733         default:
2734                 break;
2735         }
2736
2737         return -EOPNOTSUPP;
2738 }
2739
2740 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2741 {
2742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2743         struct vif_params params;
2744         int err;
2745         enum nl80211_iftype otype, ntype;
2746         struct net_device *dev = info->user_ptr[1];
2747         u32 _flags, *flags = NULL;
2748         bool change = false;
2749
2750         memset(&params, 0, sizeof(params));
2751
2752         otype = ntype = dev->ieee80211_ptr->iftype;
2753
2754         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2755                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2756                 if (otype != ntype)
2757                         change = true;
2758                 if (ntype > NL80211_IFTYPE_MAX)
2759                         return -EINVAL;
2760         }
2761
2762         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2763                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2764
2765                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2766                         return -EINVAL;
2767                 if (netif_running(dev))
2768                         return -EBUSY;
2769
2770                 wdev_lock(wdev);
2771                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2772                              IEEE80211_MAX_MESH_ID_LEN);
2773                 wdev->mesh_id_up_len =
2774                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2775                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2776                        wdev->mesh_id_up_len);
2777                 wdev_unlock(wdev);
2778         }
2779
2780         if (info->attrs[NL80211_ATTR_4ADDR]) {
2781                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2782                 change = true;
2783                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2784                 if (err)
2785                         return err;
2786         } else {
2787                 params.use_4addr = -1;
2788         }
2789
2790         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2791                 if (ntype != NL80211_IFTYPE_MONITOR)
2792                         return -EINVAL;
2793                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2794                                           &_flags);
2795                 if (err)
2796                         return err;
2797
2798                 flags = &_flags;
2799                 change = true;
2800         }
2801
2802         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2803                 const u8 *mumimo_groups;
2804                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2805
2806                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2807                         return -EOPNOTSUPP;
2808
2809                 mumimo_groups =
2810                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2811
2812                 /* bits 0 and 63 are reserved and must be zero */
2813                 if ((mumimo_groups[0] & BIT(7)) ||
2814                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
2815                         return -EINVAL;
2816
2817                 memcpy(params.vht_mumimo_groups, mumimo_groups,
2818                        VHT_MUMIMO_GROUPS_DATA_LEN);
2819                 change = true;
2820         }
2821
2822         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2823                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2824
2825                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2826                         return -EOPNOTSUPP;
2827
2828                 nla_memcpy(params.macaddr,
2829                            info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR],
2830                            ETH_ALEN);
2831                 change = true;
2832         }
2833
2834         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2835             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2836                 return -EOPNOTSUPP;
2837
2838         if (change)
2839                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2840         else
2841                 err = 0;
2842
2843         if (!err && params.use_4addr != -1)
2844                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2845
2846         return err;
2847 }
2848
2849 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2850 {
2851         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2852         struct vif_params params;
2853         struct wireless_dev *wdev;
2854         struct sk_buff *msg;
2855         int err;
2856         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2857         u32 flags;
2858
2859         /* to avoid failing a new interface creation due to pending removal */
2860         cfg80211_destroy_ifaces(rdev);
2861
2862         memset(&params, 0, sizeof(params));
2863
2864         if (!info->attrs[NL80211_ATTR_IFNAME])
2865                 return -EINVAL;
2866
2867         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2868                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2869                 if (type > NL80211_IFTYPE_MAX)
2870                         return -EINVAL;
2871         }
2872
2873         if (!rdev->ops->add_virtual_intf ||
2874             !(rdev->wiphy.interface_modes & (1 << type)))
2875                 return -EOPNOTSUPP;
2876
2877         if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN ||
2878              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2879             info->attrs[NL80211_ATTR_MAC]) {
2880                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2881                            ETH_ALEN);
2882                 if (!is_valid_ether_addr(params.macaddr))
2883                         return -EADDRNOTAVAIL;
2884         }
2885
2886         if (info->attrs[NL80211_ATTR_4ADDR]) {
2887                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2888                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2889                 if (err)
2890                         return err;
2891         }
2892
2893         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2894                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2895                                   &flags);
2896
2897         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2898             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2899                 return -EOPNOTSUPP;
2900
2901         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2902         if (!msg)
2903                 return -ENOMEM;
2904
2905         wdev = rdev_add_virtual_intf(rdev,
2906                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2907                                 NET_NAME_USER, type, err ? NULL : &flags,
2908                                 &params);
2909         if (WARN_ON(!wdev)) {
2910                 nlmsg_free(msg);
2911                 return -EPROTO;
2912         } else if (IS_ERR(wdev)) {
2913                 nlmsg_free(msg);
2914                 return PTR_ERR(wdev);
2915         }
2916
2917         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2918                 wdev->owner_nlportid = info->snd_portid;
2919
2920         switch (type) {
2921         case NL80211_IFTYPE_MESH_POINT:
2922                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2923                         break;
2924                 wdev_lock(wdev);
2925                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2926                              IEEE80211_MAX_MESH_ID_LEN);
2927                 wdev->mesh_id_up_len =
2928                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2929                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2930                        wdev->mesh_id_up_len);
2931                 wdev_unlock(wdev);
2932                 break;
2933         case NL80211_IFTYPE_NAN:
2934         case NL80211_IFTYPE_P2P_DEVICE:
2935                 /*
2936                  * P2P Device and NAN do not have a netdev, so don't go
2937                  * through the netdev notifier and must be added here
2938                  */
2939                 mutex_init(&wdev->mtx);
2940                 INIT_LIST_HEAD(&wdev->event_list);
2941                 spin_lock_init(&wdev->event_lock);
2942                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2943                 spin_lock_init(&wdev->mgmt_registrations_lock);
2944
2945                 wdev->identifier = ++rdev->wdev_id;
2946                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2947                 rdev->devlist_generation++;
2948                 break;
2949         default:
2950                 break;
2951         }
2952
2953         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2954                                rdev, wdev, false) < 0) {
2955                 nlmsg_free(msg);
2956                 return -ENOBUFS;
2957         }
2958
2959         /*
2960          * For wdevs which have no associated netdev object (e.g. of type
2961          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
2962          * For all other types, the event will be generated from the
2963          * netdev notifier
2964          */
2965         if (!wdev->netdev)
2966                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
2967
2968         return genlmsg_reply(msg, info);
2969 }
2970
2971 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2972 {
2973         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2974         struct wireless_dev *wdev = info->user_ptr[1];
2975
2976         if (!rdev->ops->del_virtual_intf)
2977                 return -EOPNOTSUPP;
2978
2979         /*
2980          * If we remove a wireless device without a netdev then clear
2981          * user_ptr[1] so that nl80211_post_doit won't dereference it
2982          * to check if it needs to do dev_put(). Otherwise it crashes
2983          * since the wdev has been freed, unlike with a netdev where
2984          * we need the dev_put() for the netdev to really be freed.
2985          */
2986         if (!wdev->netdev)
2987                 info->user_ptr[1] = NULL;
2988
2989         return rdev_del_virtual_intf(rdev, wdev);
2990 }
2991
2992 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2993 {
2994         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2995         struct net_device *dev = info->user_ptr[1];
2996         u16 noack_map;
2997
2998         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2999                 return -EINVAL;
3000
3001         if (!rdev->ops->set_noack_map)
3002                 return -EOPNOTSUPP;
3003
3004         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
3005
3006         return rdev_set_noack_map(rdev, dev, noack_map);
3007 }
3008
3009 struct get_key_cookie {
3010         struct sk_buff *msg;
3011         int error;
3012         int idx;
3013 };
3014
3015 static void get_key_callback(void *c, struct key_params *params)
3016 {
3017         struct nlattr *key;
3018         struct get_key_cookie *cookie = c;
3019
3020         if ((params->key &&
3021              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
3022                      params->key_len, params->key)) ||
3023             (params->seq &&
3024              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
3025                      params->seq_len, params->seq)) ||
3026             (params->cipher &&
3027              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
3028                          params->cipher)))
3029                 goto nla_put_failure;
3030
3031         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
3032         if (!key)
3033                 goto nla_put_failure;
3034
3035         if ((params->key &&
3036              nla_put(cookie->msg, NL80211_KEY_DATA,
3037                      params->key_len, params->key)) ||
3038             (params->seq &&
3039              nla_put(cookie->msg, NL80211_KEY_SEQ,
3040                      params->seq_len, params->seq)) ||
3041             (params->cipher &&
3042              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
3043                          params->cipher)))
3044                 goto nla_put_failure;
3045
3046         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
3047                 goto nla_put_failure;
3048
3049         nla_nest_end(cookie->msg, key);
3050
3051         return;
3052  nla_put_failure:
3053         cookie->error = 1;
3054 }
3055
3056 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
3057 {
3058         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3059         int err;
3060         struct net_device *dev = info->user_ptr[1];
3061         u8 key_idx = 0;
3062         const u8 *mac_addr = NULL;
3063         bool pairwise;
3064         struct get_key_cookie cookie = {
3065                 .error = 0,
3066         };
3067         void *hdr;
3068         struct sk_buff *msg;
3069
3070         if (info->attrs[NL80211_ATTR_KEY_IDX])
3071                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
3072
3073         if (key_idx > 5)
3074                 return -EINVAL;
3075
3076         if (info->attrs[NL80211_ATTR_MAC])
3077                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3078
3079         pairwise = !!mac_addr;
3080         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3081                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3082
3083                 if (kt >= NUM_NL80211_KEYTYPES)
3084                         return -EINVAL;
3085                 if (kt != NL80211_KEYTYPE_GROUP &&
3086                     kt != NL80211_KEYTYPE_PAIRWISE)
3087                         return -EINVAL;
3088                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3089         }
3090
3091         if (!rdev->ops->get_key)
3092                 return -EOPNOTSUPP;
3093
3094         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3095                 return -ENOENT;
3096
3097         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3098         if (!msg)
3099                 return -ENOMEM;
3100
3101         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3102                              NL80211_CMD_NEW_KEY);
3103         if (!hdr)
3104                 goto nla_put_failure;
3105
3106         cookie.msg = msg;
3107         cookie.idx = key_idx;
3108
3109         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3110             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3111                 goto nla_put_failure;
3112         if (mac_addr &&
3113             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3114                 goto nla_put_failure;
3115
3116         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3117                            get_key_callback);
3118
3119         if (err)
3120                 goto free_msg;
3121
3122         if (cookie.error)
3123                 goto nla_put_failure;
3124
3125         genlmsg_end(msg, hdr);
3126         return genlmsg_reply(msg, info);
3127
3128  nla_put_failure:
3129         err = -ENOBUFS;
3130  free_msg:
3131         nlmsg_free(msg);
3132         return err;
3133 }
3134
3135 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3136 {
3137         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3138         struct key_parse key;
3139         int err;
3140         struct net_device *dev = info->user_ptr[1];
3141
3142         err = nl80211_parse_key(info, &key);
3143         if (err)
3144                 return err;
3145
3146         if (key.idx < 0)
3147                 return -EINVAL;
3148
3149         /* only support setting default key */
3150         if (!key.def && !key.defmgmt)
3151                 return -EINVAL;
3152
3153         wdev_lock(dev->ieee80211_ptr);
3154
3155         if (key.def) {
3156                 if (!rdev->ops->set_default_key) {
3157                         err = -EOPNOTSUPP;
3158                         goto out;
3159                 }
3160
3161                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3162                 if (err)
3163                         goto out;
3164
3165                 err = rdev_set_default_key(rdev, dev, key.idx,
3166                                                  key.def_uni, key.def_multi);
3167
3168                 if (err)
3169                         goto out;
3170
3171 #ifdef CONFIG_CFG80211_WEXT
3172                 dev->ieee80211_ptr->wext.default_key = key.idx;
3173 #endif
3174         } else {
3175                 if (key.def_uni || !key.def_multi) {
3176                         err = -EINVAL;
3177                         goto out;
3178                 }
3179
3180                 if (!rdev->ops->set_default_mgmt_key) {
3181                         err = -EOPNOTSUPP;
3182                         goto out;
3183                 }
3184
3185                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3186                 if (err)
3187                         goto out;
3188
3189                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3190                 if (err)
3191                         goto out;
3192
3193 #ifdef CONFIG_CFG80211_WEXT
3194                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3195 #endif
3196         }
3197
3198  out:
3199         wdev_unlock(dev->ieee80211_ptr);
3200
3201         return err;
3202 }
3203
3204 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3205 {
3206         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3207         int err;
3208         struct net_device *dev = info->user_ptr[1];
3209         struct key_parse key;
3210         const u8 *mac_addr = NULL;
3211
3212         err = nl80211_parse_key(info, &key);
3213         if (err)
3214                 return err;
3215
3216         if (!key.p.key)
3217                 return -EINVAL;
3218
3219         if (info->attrs[NL80211_ATTR_MAC])
3220                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3221
3222         if (key.type == -1) {
3223                 if (mac_addr)
3224                         key.type = NL80211_KEYTYPE_PAIRWISE;
3225                 else
3226                         key.type = NL80211_KEYTYPE_GROUP;
3227         }
3228
3229         /* for now */
3230         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3231             key.type != NL80211_KEYTYPE_GROUP)
3232                 return -EINVAL;
3233
3234         if (!rdev->ops->add_key)
3235                 return -EOPNOTSUPP;
3236
3237         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3238                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3239                                            mac_addr))
3240                 return -EINVAL;
3241
3242         wdev_lock(dev->ieee80211_ptr);
3243         err = nl80211_key_allowed(dev->ieee80211_ptr);
3244         if (!err)
3245                 err = rdev_add_key(rdev, dev, key.idx,
3246                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3247                                     mac_addr, &key.p);
3248         wdev_unlock(dev->ieee80211_ptr);
3249
3250         return err;
3251 }
3252
3253 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3254 {
3255         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3256         int err;
3257         struct net_device *dev = info->user_ptr[1];
3258         u8 *mac_addr = NULL;
3259         struct key_parse key;
3260
3261         err = nl80211_parse_key(info, &key);
3262         if (err)
3263                 return err;
3264
3265         if (info->attrs[NL80211_ATTR_MAC])
3266                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3267
3268         if (key.type == -1) {
3269                 if (mac_addr)
3270                         key.type = NL80211_KEYTYPE_PAIRWISE;
3271                 else
3272                         key.type = NL80211_KEYTYPE_GROUP;
3273         }
3274
3275         /* for now */
3276         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3277             key.type != NL80211_KEYTYPE_GROUP)
3278                 return -EINVAL;
3279
3280         if (!rdev->ops->del_key)
3281                 return -EOPNOTSUPP;
3282
3283         wdev_lock(dev->ieee80211_ptr);
3284         err = nl80211_key_allowed(dev->ieee80211_ptr);
3285
3286         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3287             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3288                 err = -ENOENT;
3289
3290         if (!err)
3291                 err = rdev_del_key(rdev, dev, key.idx,
3292                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3293                                    mac_addr);
3294
3295 #ifdef CONFIG_CFG80211_WEXT
3296         if (!err) {
3297                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3298                         dev->ieee80211_ptr->wext.default_key = -1;
3299                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3300                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3301         }
3302 #endif
3303         wdev_unlock(dev->ieee80211_ptr);
3304
3305         return err;
3306 }
3307
3308 /* This function returns an error or the number of nested attributes */
3309 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3310 {
3311         struct nlattr *attr;
3312         int n_entries = 0, tmp;
3313
3314         nla_for_each_nested(attr, nl_attr, tmp) {
3315                 if (nla_len(attr) != ETH_ALEN)
3316                         return -EINVAL;
3317
3318                 n_entries++;
3319         }
3320
3321         return n_entries;
3322 }
3323
3324 /*
3325  * This function parses ACL information and allocates memory for ACL data.
3326  * On successful return, the calling function is responsible to free the
3327  * ACL buffer returned by this function.
3328  */
3329 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3330                                                 struct genl_info *info)
3331 {
3332         enum nl80211_acl_policy acl_policy;
3333         struct nlattr *attr;
3334         struct cfg80211_acl_data *acl;
3335         int i = 0, n_entries, tmp;
3336
3337         if (!wiphy->max_acl_mac_addrs)
3338                 return ERR_PTR(-EOPNOTSUPP);
3339
3340         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3341                 return ERR_PTR(-EINVAL);
3342
3343         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3344         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3345             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3346                 return ERR_PTR(-EINVAL);
3347
3348         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3349                 return ERR_PTR(-EINVAL);
3350
3351         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3352         if (n_entries < 0)
3353                 return ERR_PTR(n_entries);
3354
3355         if (n_entries > wiphy->max_acl_mac_addrs)
3356                 return ERR_PTR(-ENOTSUPP);
3357
3358         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3359                       GFP_KERNEL);
3360         if (!acl)
3361                 return ERR_PTR(-ENOMEM);
3362
3363         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3364                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3365                 i++;
3366         }
3367
3368         acl->n_acl_entries = n_entries;
3369         acl->acl_policy = acl_policy;
3370
3371         return acl;
3372 }
3373
3374 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3375 {
3376         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3377         struct net_device *dev = info->user_ptr[1];
3378         struct cfg80211_acl_data *acl;
3379         int err;
3380
3381         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3382             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3383                 return -EOPNOTSUPP;
3384
3385         if (!dev->ieee80211_ptr->beacon_interval)
3386                 return -EINVAL;
3387
3388         acl = parse_acl_data(&rdev->wiphy, info);
3389         if (IS_ERR(acl))
3390                 return PTR_ERR(acl);
3391
3392         err = rdev_set_mac_acl(rdev, dev, acl);
3393
3394         kfree(acl);
3395
3396         return err;
3397 }
3398
3399 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
3400                            u8 *rates, u8 rates_len)
3401 {
3402         u8 i;
3403         u32 mask = 0;
3404
3405         for (i = 0; i < rates_len; i++) {
3406                 int rate = (rates[i] & 0x7f) * 5;
3407                 int ridx;
3408
3409                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
3410                         struct ieee80211_rate *srate =
3411                                 &sband->bitrates[ridx];
3412                         if (rate == srate->bitrate) {
3413                                 mask |= 1 << ridx;
3414                                 break;
3415                         }
3416                 }
3417                 if (ridx == sband->n_bitrates)
3418                         return 0; /* rate not found */
3419         }
3420
3421         return mask;
3422 }
3423
3424 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
3425                                u8 *rates, u8 rates_len,
3426                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
3427 {
3428         u8 i;
3429
3430         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
3431
3432         for (i = 0; i < rates_len; i++) {
3433                 int ridx, rbit;
3434
3435                 ridx = rates[i] / 8;
3436                 rbit = BIT(rates[i] % 8);
3437
3438                 /* check validity */
3439                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
3440                         return false;
3441
3442                 /* check availability */
3443                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
3444                         mcs[ridx] |= rbit;
3445                 else
3446                         return false;
3447         }
3448
3449         return true;
3450 }
3451
3452 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
3453 {
3454         u16 mcs_mask = 0;
3455
3456         switch (vht_mcs_map) {
3457         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
3458                 break;
3459         case IEEE80211_VHT_MCS_SUPPORT_0_7:
3460                 mcs_mask = 0x00FF;
3461                 break;
3462         case IEEE80211_VHT_MCS_SUPPORT_0_8:
3463                 mcs_mask = 0x01FF;
3464                 break;
3465         case IEEE80211_VHT_MCS_SUPPORT_0_9:
3466                 mcs_mask = 0x03FF;
3467                 break;
3468         default:
3469                 break;
3470         }
3471
3472         return mcs_mask;
3473 }
3474
3475 static void vht_build_mcs_mask(u16 vht_mcs_map,
3476                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
3477 {
3478         u8 nss;
3479
3480         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
3481                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
3482                 vht_mcs_map >>= 2;
3483         }
3484 }
3485
3486 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
3487                              struct nl80211_txrate_vht *txrate,
3488                              u16 mcs[NL80211_VHT_NSS_MAX])
3489 {
3490         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3491         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
3492         u8 i;
3493
3494         if (!sband->vht_cap.vht_supported)
3495                 return false;
3496
3497         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
3498
3499         /* Build vht_mcs_mask from VHT capabilities */
3500         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
3501
3502         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3503                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
3504                         mcs[i] = txrate->mcs[i];
3505                 else
3506                         return false;
3507         }
3508
3509         return true;
3510 }
3511
3512 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
3513         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
3514                                     .len = NL80211_MAX_SUPP_RATES },
3515         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
3516                                 .len = NL80211_MAX_SUPP_HT_RATES },
3517         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
3518         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
3519 };
3520
3521 static int nl80211_parse_tx_bitrate_mask(struct genl_info *info,
3522                                          struct cfg80211_bitrate_mask *mask)
3523 {
3524         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
3525         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3526         int rem, i;
3527         struct nlattr *tx_rates;
3528         struct ieee80211_supported_band *sband;
3529         u16 vht_tx_mcs_map;
3530
3531         memset(mask, 0, sizeof(*mask));
3532         /* Default to all rates enabled */
3533         for (i = 0; i < NUM_NL80211_BANDS; i++) {
3534                 sband = rdev->wiphy.bands[i];
3535
3536                 if (!sband)
3537                         continue;
3538
3539                 mask->control[i].legacy = (1 << sband->n_bitrates) - 1;
3540                 memcpy(mask->control[i].ht_mcs,
3541                        sband->ht_cap.mcs.rx_mask,
3542                        sizeof(mask->control[i].ht_mcs));
3543
3544                 if (!sband->vht_cap.vht_supported)
3545                         continue;
3546
3547                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3548                 vht_build_mcs_mask(vht_tx_mcs_map, mask->control[i].vht_mcs);
3549         }
3550
3551         /* if no rates are given set it back to the defaults */
3552         if (!info->attrs[NL80211_ATTR_TX_RATES])
3553                 goto out;
3554
3555         /* The nested attribute uses enum nl80211_band as the index. This maps
3556          * directly to the enum nl80211_band values used in cfg80211.
3557          */
3558         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
3559         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
3560                 enum nl80211_band band = nla_type(tx_rates);
3561                 int err;
3562
3563                 if (band < 0 || band >= NUM_NL80211_BANDS)
3564                         return -EINVAL;
3565                 sband = rdev->wiphy.bands[band];
3566                 if (sband == NULL)
3567                         return -EINVAL;
3568                 err = nla_parse_nested(tb, NL80211_TXRATE_MAX, tx_rates,
3569                                        nl80211_txattr_policy);
3570                 if (err)
3571                         return err;
3572                 if (tb[NL80211_TXRATE_LEGACY]) {
3573                         mask->control[band].legacy = rateset_to_mask(
3574                                 sband,
3575                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
3576                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
3577                         if ((mask->control[band].legacy == 0) &&
3578                             nla_len(tb[NL80211_TXRATE_LEGACY]))
3579                                 return -EINVAL;
3580                 }
3581                 if (tb[NL80211_TXRATE_HT]) {
3582                         if (!ht_rateset_to_mask(
3583                                         sband,
3584                                         nla_data(tb[NL80211_TXRATE_HT]),
3585                                         nla_len(tb[NL80211_TXRATE_HT]),
3586                                         mask->control[band].ht_mcs))
3587                                 return -EINVAL;
3588                 }
3589                 if (tb[NL80211_TXRATE_VHT]) {
3590                         if (!vht_set_mcs_mask(
3591                                         sband,
3592                                         nla_data(tb[NL80211_TXRATE_VHT]),
3593                                         mask->control[band].vht_mcs))
3594                                 return -EINVAL;
3595                 }
3596                 if (tb[NL80211_TXRATE_GI]) {
3597                         mask->control[band].gi =
3598                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
3599                         if (mask->control[band].gi > NL80211_TXRATE_FORCE_LGI)
3600                                 return -EINVAL;
3601                 }
3602
3603                 if (mask->control[band].legacy == 0) {
3604                         /* don't allow empty legacy rates if HT or VHT
3605                          * are not even supported.
3606                          */
3607                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
3608                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
3609                                 return -EINVAL;
3610
3611                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
3612                                 if (mask->control[band].ht_mcs[i])
3613                                         goto out;
3614
3615                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
3616                                 if (mask->control[band].vht_mcs[i])
3617                                         goto out;
3618
3619                         /* legacy and mcs rates may not be both empty */
3620                         return -EINVAL;
3621                 }
3622         }
3623
3624 out:
3625         return 0;
3626 }
3627
3628 static int validate_beacon_tx_rate(struct cfg80211_registered_device *rdev,
3629                                    enum nl80211_band band,
3630                                    struct cfg80211_bitrate_mask *beacon_rate)
3631 {
3632         u32 count_ht, count_vht, i;
3633         u32 rate = beacon_rate->control[band].legacy;
3634
3635         /* Allow only one rate */
3636         if (hweight32(rate) > 1)
3637                 return -EINVAL;
3638
3639         count_ht = 0;
3640         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
3641                 if (hweight8(beacon_rate->control[band].ht_mcs[i]) > 1) {
3642                         return -EINVAL;
3643                 } else if (beacon_rate->control[band].ht_mcs[i]) {
3644                         count_ht++;
3645                         if (count_ht > 1)
3646                                 return -EINVAL;
3647                 }
3648                 if (count_ht && rate)
3649                         return -EINVAL;
3650         }
3651
3652         count_vht = 0;
3653         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3654                 if (hweight16(beacon_rate->control[band].vht_mcs[i]) > 1) {
3655                         return -EINVAL;
3656                 } else if (beacon_rate->control[band].vht_mcs[i]) {
3657                         count_vht++;
3658                         if (count_vht > 1)
3659                                 return -EINVAL;
3660                 }
3661                 if (count_vht && rate)
3662                         return -EINVAL;
3663         }
3664
3665         if ((count_ht && count_vht) || (!rate && !count_ht && !count_vht))
3666                 return -EINVAL;
3667
3668         if (rate &&
3669             !wiphy_ext_feature_isset(&rdev->wiphy,
3670                                      NL80211_EXT_FEATURE_BEACON_RATE_LEGACY))
3671                 return -EINVAL;
3672         if (count_ht &&
3673             !wiphy_ext_feature_isset(&rdev->wiphy,
3674                                      NL80211_EXT_FEATURE_BEACON_RATE_HT))
3675                 return -EINVAL;
3676         if (count_vht &&
3677             !wiphy_ext_feature_isset(&rdev->wiphy,
3678                                      NL80211_EXT_FEATURE_BEACON_RATE_VHT))
3679                 return -EINVAL;
3680
3681         return 0;
3682 }
3683
3684 static int nl80211_parse_beacon(struct nlattr *attrs[],
3685                                 struct cfg80211_beacon_data *bcn)
3686 {
3687         bool haveinfo = false;
3688
3689         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3690             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3691             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3692             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3693                 return -EINVAL;
3694
3695         memset(bcn, 0, sizeof(*bcn));
3696
3697         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3698                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3699                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3700                 if (!bcn->head_len)
3701                         return -EINVAL;
3702                 haveinfo = true;
3703         }
3704
3705         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3706                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3707                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3708                 haveinfo = true;
3709         }
3710
3711         if (!haveinfo)
3712                 return -EINVAL;
3713
3714         if (attrs[NL80211_ATTR_IE]) {
3715                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3716                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3717         }
3718
3719         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3720                 bcn->proberesp_ies =
3721                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3722                 bcn->proberesp_ies_len =
3723                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3724         }
3725
3726         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3727                 bcn->assocresp_ies =
3728                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3729                 bcn->assocresp_ies_len =
3730                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3731         }
3732
3733         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3734                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3735                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3736         }
3737
3738         return 0;
3739 }
3740
3741 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3742                                    struct cfg80211_ap_settings *params)
3743 {
3744         struct wireless_dev *wdev;
3745         bool ret = false;
3746
3747         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3748                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3749                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3750                         continue;
3751
3752                 if (!wdev->preset_chandef.chan)
3753                         continue;
3754
3755                 params->chandef = wdev->preset_chandef;
3756                 ret = true;
3757                 break;
3758         }
3759
3760         return ret;
3761 }
3762
3763 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3764                                     enum nl80211_auth_type auth_type,
3765                                     enum nl80211_commands cmd)
3766 {
3767         if (auth_type > NL80211_AUTHTYPE_MAX)
3768                 return false;
3769
3770         switch (cmd) {
3771         case NL80211_CMD_AUTHENTICATE:
3772                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3773                     auth_type == NL80211_AUTHTYPE_SAE)
3774                         return false;
3775                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
3776                                              NL80211_EXT_FEATURE_FILS_STA) &&
3777                     (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3778                      auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3779                      auth_type == NL80211_AUTHTYPE_FILS_PK))
3780                         return false;
3781                 return true;
3782         case NL80211_CMD_CONNECT:
3783         case NL80211_CMD_START_AP:
3784                 /* SAE not supported yet */
3785                 if (auth_type == NL80211_AUTHTYPE_SAE)
3786                         return false;
3787                 /* FILS not supported yet */
3788                 if (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3789                     auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3790                     auth_type == NL80211_AUTHTYPE_FILS_PK)
3791                         return false;
3792                 return true;
3793         default:
3794                 return false;
3795         }
3796 }
3797
3798 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3799 {
3800         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3801         struct net_device *dev = info->user_ptr[1];
3802         struct wireless_dev *wdev = dev->ieee80211_ptr;
3803         struct cfg80211_ap_settings params;
3804         int err;
3805
3806         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3807             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3808                 return -EOPNOTSUPP;
3809
3810         if (!rdev->ops->start_ap)
3811                 return -EOPNOTSUPP;
3812
3813         if (wdev->beacon_interval)
3814                 return -EALREADY;
3815
3816         memset(&params, 0, sizeof(params));
3817
3818         /* these are required for START_AP */
3819         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3820             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3821             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3822                 return -EINVAL;
3823
3824         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3825         if (err)
3826                 return err;
3827
3828         params.beacon_interval =
3829                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3830         params.dtim_period =
3831                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3832
3833         err = cfg80211_validate_beacon_int(rdev, dev->ieee80211_ptr->iftype,
3834                                            params.beacon_interval);
3835         if (err)
3836                 return err;
3837
3838         /*
3839          * In theory, some of these attributes should be required here
3840          * but since they were not used when the command was originally
3841          * added, keep them optional for old user space programs to let
3842          * them continue to work with drivers that do not need the
3843          * additional information -- drivers must check!
3844          */
3845         if (info->attrs[NL80211_ATTR_SSID]) {
3846                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3847                 params.ssid_len =
3848                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3849                 if (params.ssid_len == 0 ||
3850                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3851                         return -EINVAL;
3852         }
3853
3854         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3855                 params.hidden_ssid = nla_get_u32(
3856                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3857                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3858                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3859                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3860                         return -EINVAL;
3861         }
3862
3863         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3864
3865         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3866                 params.auth_type = nla_get_u32(
3867                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3868                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3869                                              NL80211_CMD_START_AP))
3870                         return -EINVAL;
3871         } else
3872                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3873
3874         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3875                                       NL80211_MAX_NR_CIPHER_SUITES);
3876         if (err)
3877                 return err;
3878
3879         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3880                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3881                         return -EOPNOTSUPP;
3882                 params.inactivity_timeout = nla_get_u16(
3883                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3884         }
3885
3886         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3887                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3888                         return -EINVAL;
3889                 params.p2p_ctwindow =
3890                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3891                 if (params.p2p_ctwindow > 127)
3892                         return -EINVAL;
3893                 if (params.p2p_ctwindow != 0 &&
3894                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3895                         return -EINVAL;
3896         }
3897
3898         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3899                 u8 tmp;
3900
3901                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3902                         return -EINVAL;
3903                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3904                 if (tmp > 1)
3905                         return -EINVAL;
3906                 params.p2p_opp_ps = tmp;
3907                 if (params.p2p_opp_ps != 0 &&
3908                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3909                         return -EINVAL;
3910         }
3911
3912         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3913                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3914                 if (err)
3915                         return err;
3916         } else if (wdev->preset_chandef.chan) {
3917                 params.chandef = wdev->preset_chandef;
3918         } else if (!nl80211_get_ap_channel(rdev, &params))
3919                 return -EINVAL;
3920
3921         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3922                                            wdev->iftype))
3923                 return -EINVAL;
3924
3925         if (info->attrs[NL80211_ATTR_TX_RATES]) {
3926                 err = nl80211_parse_tx_bitrate_mask(info, &params.beacon_rate);
3927                 if (err)
3928                         return err;
3929
3930                 err = validate_beacon_tx_rate(rdev, params.chandef.chan->band,
3931                                               &params.beacon_rate);
3932                 if (err)
3933                         return err;
3934         }
3935
3936         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3937                 params.smps_mode =
3938                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3939                 switch (params.smps_mode) {
3940                 case NL80211_SMPS_OFF:
3941                         break;
3942                 case NL80211_SMPS_STATIC:
3943                         if (!(rdev->wiphy.features &
3944                               NL80211_FEATURE_STATIC_SMPS))
3945                                 return -EINVAL;
3946                         break;
3947                 case NL80211_SMPS_DYNAMIC:
3948                         if (!(rdev->wiphy.features &
3949                               NL80211_FEATURE_DYNAMIC_SMPS))
3950                                 return -EINVAL;
3951                         break;
3952                 default:
3953                         return -EINVAL;
3954                 }
3955         } else {
3956                 params.smps_mode = NL80211_SMPS_OFF;
3957         }
3958
3959         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3960         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3961                 return -EOPNOTSUPP;
3962
3963         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3964                 params.acl = parse_acl_data(&rdev->wiphy, info);
3965                 if (IS_ERR(params.acl))
3966                         return PTR_ERR(params.acl);
3967         }
3968
3969         wdev_lock(wdev);
3970         err = rdev_start_ap(rdev, dev, &params);
3971         if (!err) {
3972                 wdev->preset_chandef = params.chandef;
3973                 wdev->beacon_interval = params.beacon_interval;
3974                 wdev->chandef = params.chandef;
3975                 wdev->ssid_len = params.ssid_len;
3976                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3977         }
3978         wdev_unlock(wdev);
3979
3980         kfree(params.acl);
3981
3982         return err;
3983 }
3984
3985 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3986 {
3987         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3988         struct net_device *dev = info->user_ptr[1];
3989         struct wireless_dev *wdev = dev->ieee80211_ptr;
3990         struct cfg80211_beacon_data params;
3991         int err;
3992
3993         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3994             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3995                 return -EOPNOTSUPP;
3996
3997         if (!rdev->ops->change_beacon)
3998                 return -EOPNOTSUPP;
3999
4000         if (!wdev->beacon_interval)
4001                 return -EINVAL;
4002
4003         err = nl80211_parse_beacon(info->attrs, &params);
4004         if (err)
4005                 return err;
4006
4007         wdev_lock(wdev);
4008         err = rdev_change_beacon(rdev, dev, &params);
4009         wdev_unlock(wdev);
4010
4011         return err;
4012 }
4013
4014 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
4015 {
4016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4017         struct net_device *dev = info->user_ptr[1];
4018
4019         return cfg80211_stop_ap(rdev, dev, false);
4020 }
4021
4022 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
4023         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
4024         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
4025         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
4026         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
4027         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
4028         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
4029 };
4030
4031 static int parse_station_flags(struct genl_info *info,
4032                                enum nl80211_iftype iftype,
4033                                struct station_parameters *params)
4034 {
4035         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
4036         struct nlattr *nla;
4037         int flag;
4038
4039         /*
4040          * Try parsing the new attribute first so userspace
4041          * can specify both for older kernels.
4042          */
4043         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
4044         if (nla) {
4045                 struct nl80211_sta_flag_update *sta_flags;
4046
4047                 sta_flags = nla_data(nla);
4048                 params->sta_flags_mask = sta_flags->mask;
4049                 params->sta_flags_set = sta_flags->set;
4050                 params->sta_flags_set &= params->sta_flags_mask;
4051                 if ((params->sta_flags_mask |
4052                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
4053                         return -EINVAL;
4054                 return 0;
4055         }
4056
4057         /* if present, parse the old attribute */
4058
4059         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
4060         if (!nla)
4061                 return 0;
4062
4063         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
4064                              nla, sta_flags_policy))
4065                 return -EINVAL;
4066
4067         /*
4068          * Only allow certain flags for interface types so that
4069          * other attributes are silently ignored. Remember that
4070          * this is backward compatibility code with old userspace
4071          * and shouldn't be hit in other cases anyway.
4072          */
4073         switch (iftype) {
4074         case NL80211_IFTYPE_AP:
4075         case NL80211_IFTYPE_AP_VLAN:
4076         case NL80211_IFTYPE_P2P_GO:
4077                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4078                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4079                                          BIT(NL80211_STA_FLAG_WME) |
4080                                          BIT(NL80211_STA_FLAG_MFP);
4081                 break;
4082         case NL80211_IFTYPE_P2P_CLIENT:
4083         case NL80211_IFTYPE_STATION:
4084                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4085                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
4086                 break;
4087         case NL80211_IFTYPE_MESH_POINT:
4088                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4089                                          BIT(NL80211_STA_FLAG_MFP) |
4090                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
4091         default:
4092                 return -EINVAL;
4093         }
4094
4095         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
4096                 if (flags[flag]) {
4097                         params->sta_flags_set |= (1<<flag);
4098
4099                         /* no longer support new API additions in old API */
4100                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
4101                                 return -EINVAL;
4102                 }
4103         }
4104
4105         return 0;
4106 }
4107
4108 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
4109                                  int attr)
4110 {
4111         struct nlattr *rate;
4112         u32 bitrate;
4113         u16 bitrate_compat;
4114         enum nl80211_attrs rate_flg;
4115
4116         rate = nla_nest_start(msg, attr);
4117         if (!rate)
4118                 return false;
4119
4120         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
4121         bitrate = cfg80211_calculate_bitrate(info);
4122         /* report 16-bit bitrate only if we can */
4123         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
4124         if (bitrate > 0 &&
4125             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
4126                 return false;
4127         if (bitrate_compat > 0 &&
4128             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
4129                 return false;
4130
4131         switch (info->bw) {
4132         case RATE_INFO_BW_5:
4133                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
4134                 break;
4135         case RATE_INFO_BW_10:
4136                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
4137                 break;
4138         default:
4139                 WARN_ON(1);
4140                 /* fall through */
4141         case RATE_INFO_BW_20:
4142                 rate_flg = 0;
4143                 break;
4144         case RATE_INFO_BW_40:
4145                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
4146                 break;
4147         case RATE_INFO_BW_80:
4148                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
4149                 break;
4150         case RATE_INFO_BW_160:
4151                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
4152                 break;
4153         }
4154
4155         if (rate_flg && nla_put_flag(msg, rate_flg))
4156                 return false;
4157
4158         if (info->flags & RATE_INFO_FLAGS_MCS) {
4159                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
4160                         return false;
4161                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4162                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4163                         return false;
4164         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
4165                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
4166                         return false;
4167                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
4168                         return false;
4169                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4170                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4171                         return false;
4172         }
4173
4174         nla_nest_end(msg, rate);
4175         return true;
4176 }
4177
4178 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
4179                                int id)
4180 {
4181         void *attr;
4182         int i = 0;
4183
4184         if (!mask)
4185                 return true;
4186
4187         attr = nla_nest_start(msg, id);
4188         if (!attr)
4189                 return false;
4190
4191         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
4192                 if (!(mask & BIT(i)))
4193                         continue;
4194
4195                 if (nla_put_u8(msg, i, signal[i]))
4196                         return false;
4197         }
4198
4199         nla_nest_end(msg, attr);
4200
4201         return true;
4202 }
4203
4204 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
4205                                 u32 seq, int flags,
4206                                 struct cfg80211_registered_device *rdev,
4207                                 struct net_device *dev,
4208                                 const u8 *mac_addr, struct station_info *sinfo)
4209 {
4210         void *hdr;
4211         struct nlattr *sinfoattr, *bss_param;
4212
4213         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
4214         if (!hdr)
4215                 return -1;
4216
4217         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4218             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
4219             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
4220                 goto nla_put_failure;
4221
4222         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
4223         if (!sinfoattr)
4224                 goto nla_put_failure;
4225
4226 #define PUT_SINFO(attr, memb, type) do {                                \
4227         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
4228         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4229             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
4230                              sinfo->memb))                              \
4231                 goto nla_put_failure;                                   \
4232         } while (0)
4233 #define PUT_SINFO_U64(attr, memb) do {                                  \
4234         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4235             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
4236                               sinfo->memb, NL80211_STA_INFO_PAD))       \
4237                 goto nla_put_failure;                                   \
4238         } while (0)
4239
4240         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
4241         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
4242
4243         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
4244                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
4245             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
4246                         (u32)sinfo->rx_bytes))
4247                 goto nla_put_failure;
4248
4249         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
4250                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
4251             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
4252                         (u32)sinfo->tx_bytes))
4253                 goto nla_put_failure;
4254
4255         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
4256         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
4257         PUT_SINFO(LLID, llid, u16);
4258         PUT_SINFO(PLID, plid, u16);
4259         PUT_SINFO(PLINK_STATE, plink_state, u8);
4260         PUT_SINFO_U64(RX_DURATION, rx_duration);
4261
4262         switch (rdev->wiphy.signal_type) {
4263         case CFG80211_SIGNAL_TYPE_MBM:
4264                 PUT_SINFO(SIGNAL, signal, u8);
4265                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
4266                 break;
4267         default:
4268                 break;
4269         }
4270         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
4271                 if (!nl80211_put_signal(msg, sinfo->chains,
4272                                         sinfo->chain_signal,
4273                                         NL80211_STA_INFO_CHAIN_SIGNAL))
4274                         goto nla_put_failure;
4275         }
4276         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
4277                 if (!nl80211_put_signal(msg, sinfo->chains,
4278                                         sinfo->chain_signal_avg,
4279                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
4280                         goto nla_put_failure;
4281         }
4282         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
4283                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
4284                                           NL80211_STA_INFO_TX_BITRATE))
4285                         goto nla_put_failure;
4286         }
4287         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
4288                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
4289                                           NL80211_STA_INFO_RX_BITRATE))
4290                         goto nla_put_failure;
4291         }
4292
4293         PUT_SINFO(RX_PACKETS, rx_packets, u32);
4294         PUT_SINFO(TX_PACKETS, tx_packets, u32);
4295         PUT_SINFO(TX_RETRIES, tx_retries, u32);
4296         PUT_SINFO(TX_FAILED, tx_failed, u32);
4297         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
4298         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
4299         PUT_SINFO(LOCAL_PM, local_pm, u32);
4300         PUT_SINFO(PEER_PM, peer_pm, u32);
4301         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
4302
4303         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
4304                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
4305                 if (!bss_param)
4306                         goto nla_put_failure;
4307
4308                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
4309                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
4310                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
4311                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
4312                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
4313                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
4314                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
4315                                sinfo->bss_param.dtim_period) ||
4316                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
4317                                 sinfo->bss_param.beacon_interval))
4318                         goto nla_put_failure;
4319
4320                 nla_nest_end(msg, bss_param);
4321         }
4322         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
4323             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
4324                     sizeof(struct nl80211_sta_flag_update),
4325                     &sinfo->sta_flags))
4326                 goto nla_put_failure;
4327
4328         PUT_SINFO_U64(T_OFFSET, t_offset);
4329         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
4330         PUT_SINFO_U64(BEACON_RX, rx_beacon);
4331         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
4332
4333 #undef PUT_SINFO
4334 #undef PUT_SINFO_U64
4335
4336         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
4337                 struct nlattr *tidsattr;
4338                 int tid;
4339
4340                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
4341                 if (!tidsattr)
4342                         goto nla_put_failure;
4343
4344                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
4345                         struct cfg80211_tid_stats *tidstats;
4346                         struct nlattr *tidattr;
4347
4348                         tidstats = &sinfo->pertid[tid];
4349
4350                         if (!tidstats->filled)
4351                                 continue;
4352
4353                         tidattr = nla_nest_start(msg, tid + 1);
4354                         if (!tidattr)
4355                                 goto nla_put_failure;
4356
4357 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
4358         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
4359             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
4360                               tidstats->memb, NL80211_TID_STATS_PAD))   \
4361                 goto nla_put_failure;                                   \
4362         } while (0)
4363
4364                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
4365                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
4366                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
4367                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
4368
4369 #undef PUT_TIDVAL_U64
4370                         nla_nest_end(msg, tidattr);
4371                 }
4372
4373                 nla_nest_end(msg, tidsattr);
4374         }
4375
4376         nla_nest_end(msg, sinfoattr);
4377
4378         if (sinfo->assoc_req_ies_len &&
4379             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
4380                     sinfo->assoc_req_ies))
4381                 goto nla_put_failure;
4382
4383         genlmsg_end(msg, hdr);
4384         return 0;
4385
4386  nla_put_failure:
4387         genlmsg_cancel(msg, hdr);
4388         return -EMSGSIZE;
4389 }
4390
4391 static int nl80211_dump_station(struct sk_buff *skb,
4392                                 struct netlink_callback *cb)
4393 {
4394         struct station_info sinfo;
4395         struct cfg80211_registered_device *rdev;
4396         struct wireless_dev *wdev;
4397         u8 mac_addr[ETH_ALEN];
4398         int sta_idx = cb->args[2];
4399         int err;
4400
4401         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4402         if (err)
4403                 return err;
4404
4405         if (!wdev->netdev) {
4406                 err = -EINVAL;
4407                 goto out_err;
4408         }
4409
4410         if (!rdev->ops->dump_station) {
4411                 err = -EOPNOTSUPP;
4412                 goto out_err;
4413         }
4414
4415         while (1) {
4416                 memset(&sinfo, 0, sizeof(sinfo));
4417                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4418                                         mac_addr, &sinfo);
4419                 if (err == -ENOENT)
4420                         break;
4421                 if (err)
4422                         goto out_err;
4423
4424                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4425                                 NETLINK_CB(cb->skb).portid,
4426                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4427                                 rdev, wdev->netdev, mac_addr,
4428                                 &sinfo) < 0)
4429                         goto out;
4430
4431                 sta_idx++;
4432         }
4433
4434  out:
4435         cb->args[2] = sta_idx;
4436         err = skb->len;
4437  out_err:
4438         nl80211_finish_wdev_dump(rdev);
4439
4440         return err;
4441 }
4442
4443 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4444 {
4445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4446         struct net_device *dev = info->user_ptr[1];
4447         struct station_info sinfo;
4448         struct sk_buff *msg;
4449         u8 *mac_addr = NULL;
4450         int err;
4451
4452         memset(&sinfo, 0, sizeof(sinfo));
4453
4454         if (!info->attrs[NL80211_ATTR_MAC])
4455                 return -EINVAL;
4456
4457         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4458
4459         if (!rdev->ops->get_station)
4460                 return -EOPNOTSUPP;
4461
4462         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4463         if (err)
4464                 return err;
4465
4466         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4467         if (!msg)
4468                 return -ENOMEM;
4469
4470         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4471                                  info->snd_portid, info->snd_seq, 0,
4472                                  rdev, dev, mac_addr, &sinfo) < 0) {
4473                 nlmsg_free(msg);
4474                 return -ENOBUFS;
4475         }
4476
4477         return genlmsg_reply(msg, info);
4478 }
4479
4480 int cfg80211_check_station_change(struct wiphy *wiphy,
4481                                   struct station_parameters *params,
4482                                   enum cfg80211_station_type statype)
4483 {
4484         if (params->listen_interval != -1 &&
4485             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4486                 return -EINVAL;
4487
4488         if (params->support_p2p_ps != -1 &&
4489             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4490                 return -EINVAL;
4491
4492         if (params->aid &&
4493             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4494             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4495                 return -EINVAL;
4496
4497         /* When you run into this, adjust the code below for the new flag */
4498         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4499
4500         switch (statype) {
4501         case CFG80211_STA_MESH_PEER_KERNEL:
4502         case CFG80211_STA_MESH_PEER_USER:
4503                 /*
4504                  * No ignoring the TDLS flag here -- the userspace mesh
4505                  * code doesn't have the bug of including TDLS in the
4506                  * mask everywhere.
4507                  */
4508                 if (params->sta_flags_mask &
4509                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4510                                   BIT(NL80211_STA_FLAG_MFP) |
4511                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4512                         return -EINVAL;
4513                 break;
4514         case CFG80211_STA_TDLS_PEER_SETUP:
4515         case CFG80211_STA_TDLS_PEER_ACTIVE:
4516                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4517                         return -EINVAL;
4518                 /* ignore since it can't change */
4519                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4520                 break;
4521         default:
4522                 /* disallow mesh-specific things */
4523                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4524                         return -EINVAL;
4525                 if (params->local_pm)
4526                         return -EINVAL;
4527                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4528                         return -EINVAL;
4529         }
4530
4531         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4532             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4533                 /* TDLS can't be set, ... */
4534                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4535                         return -EINVAL;
4536                 /*
4537                  * ... but don't bother the driver with it. This works around
4538                  * a hostapd/wpa_supplicant issue -- it always includes the
4539                  * TLDS_PEER flag in the mask even for AP mode.
4540                  */
4541                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4542         }
4543
4544         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4545             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4546                 /* reject other things that can't change */
4547                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4548                         return -EINVAL;
4549                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4550                         return -EINVAL;
4551                 if (params->supported_rates)
4552                         return -EINVAL;
4553                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4554                         return -EINVAL;
4555         }
4556
4557         if (statype != CFG80211_STA_AP_CLIENT &&
4558             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4559                 if (params->vlan)
4560                         return -EINVAL;
4561         }
4562
4563         switch (statype) {
4564         case CFG80211_STA_AP_MLME_CLIENT:
4565                 /* Use this only for authorizing/unauthorizing a station */
4566                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4567                         return -EOPNOTSUPP;
4568                 break;
4569         case CFG80211_STA_AP_CLIENT:
4570         case CFG80211_STA_AP_CLIENT_UNASSOC:
4571                 /* accept only the listed bits */
4572                 if (params->sta_flags_mask &
4573                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4574                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4575                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4576                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4577                                   BIT(NL80211_STA_FLAG_WME) |
4578                                   BIT(NL80211_STA_FLAG_MFP)))
4579                         return -EINVAL;
4580
4581                 /* but authenticated/associated only if driver handles it */
4582                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4583                     params->sta_flags_mask &
4584                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4585                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4586                         return -EINVAL;
4587                 break;
4588         case CFG80211_STA_IBSS:
4589         case CFG80211_STA_AP_STA:
4590                 /* reject any changes other than AUTHORIZED */
4591                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4592                         return -EINVAL;
4593                 break;
4594         case CFG80211_STA_TDLS_PEER_SETUP:
4595                 /* reject any changes other than AUTHORIZED or WME */
4596                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4597                                                BIT(NL80211_STA_FLAG_WME)))
4598                         return -EINVAL;
4599                 /* force (at least) rates when authorizing */
4600                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4601                     !params->supported_rates)
4602                         return -EINVAL;
4603                 break;
4604         case CFG80211_STA_TDLS_PEER_ACTIVE:
4605                 /* reject any changes */
4606                 return -EINVAL;
4607         case CFG80211_STA_MESH_PEER_KERNEL:
4608                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4609                         return -EINVAL;
4610                 break;
4611         case CFG80211_STA_MESH_PEER_USER:
4612                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4613                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4614                         return -EINVAL;
4615                 break;
4616         }
4617
4618         /*
4619          * Older kernel versions ignored this attribute entirely, so don't
4620          * reject attempts to update it but mark it as unused instead so the
4621          * driver won't look at the data.
4622          */
4623         if (statype != CFG80211_STA_AP_CLIENT_UNASSOC &&
4624             statype != CFG80211_STA_TDLS_PEER_SETUP)
4625                 params->opmode_notif_used = false;
4626
4627         return 0;
4628 }
4629 EXPORT_SYMBOL(cfg80211_check_station_change);
4630
4631 /*
4632  * Get vlan interface making sure it is running and on the right wiphy.
4633  */
4634 static struct net_device *get_vlan(struct genl_info *info,
4635                                    struct cfg80211_registered_device *rdev)
4636 {
4637         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4638         struct net_device *v;
4639         int ret;
4640
4641         if (!vlanattr)
4642                 return NULL;
4643
4644         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4645         if (!v)
4646                 return ERR_PTR(-ENODEV);
4647
4648         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4649                 ret = -EINVAL;
4650                 goto error;
4651         }
4652
4653         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4654             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4655             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4656                 ret = -EINVAL;
4657                 goto error;
4658         }
4659
4660         if (!netif_running(v)) {
4661                 ret = -ENETDOWN;
4662                 goto error;
4663         }
4664
4665         return v;
4666  error:
4667         dev_put(v);
4668         return ERR_PTR(ret);
4669 }
4670
4671 static const struct nla_policy
4672 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4673         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4674         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4675 };
4676
4677 static int nl80211_parse_sta_wme(struct genl_info *info,
4678                                  struct station_parameters *params)
4679 {
4680         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4681         struct nlattr *nla;
4682         int err;
4683
4684         /* parse WME attributes if present */
4685         if (!info->attrs[NL80211_ATTR_STA_WME])
4686                 return 0;
4687
4688         nla = info->attrs[NL80211_ATTR_STA_WME];
4689         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4690                                nl80211_sta_wme_policy);
4691         if (err)
4692                 return err;
4693
4694         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4695                 params->uapsd_queues = nla_get_u8(
4696                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4697         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4698                 return -EINVAL;
4699
4700         if (tb[NL80211_STA_WME_MAX_SP])
4701                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4702
4703         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4704                 return -EINVAL;
4705
4706         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4707
4708         return 0;
4709 }
4710
4711 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4712                                       struct station_parameters *params)
4713 {
4714         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4715                 params->supported_channels =
4716                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4717                 params->supported_channels_len =
4718                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4719                 /*
4720                  * Need to include at least one (first channel, number of
4721                  * channels) tuple for each subband, and must have proper
4722                  * tuples for the rest of the data as well.
4723                  */
4724                 if (params->supported_channels_len < 2)
4725                         return -EINVAL;
4726                 if (params->supported_channels_len % 2)
4727                         return -EINVAL;
4728         }
4729
4730         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4731                 params->supported_oper_classes =
4732                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4733                 params->supported_oper_classes_len =
4734                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4735                 /*
4736                  * The value of the Length field of the Supported Operating
4737                  * Classes element is between 2 and 253.
4738                  */
4739                 if (params->supported_oper_classes_len < 2 ||
4740                     params->supported_oper_classes_len > 253)
4741                         return -EINVAL;
4742         }
4743         return 0;
4744 }
4745
4746 static int nl80211_set_station_tdls(struct genl_info *info,
4747                                     struct station_parameters *params)
4748 {
4749         int err;
4750         /* Dummy STA entry gets updated once the peer capabilities are known */
4751         if (info->attrs[NL80211_ATTR_PEER_AID])
4752                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4753         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4754                 params->ht_capa =
4755                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4756         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4757                 params->vht_capa =
4758                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4759
4760         err = nl80211_parse_sta_channel_info(info, params);
4761         if (err)
4762                 return err;
4763
4764         return nl80211_parse_sta_wme(info, params);
4765 }
4766
4767 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4768 {
4769         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4770         struct net_device *dev = info->user_ptr[1];
4771         struct station_parameters params;
4772         u8 *mac_addr;
4773         int err;
4774
4775         memset(&params, 0, sizeof(params));
4776
4777         if (!rdev->ops->change_station)
4778                 return -EOPNOTSUPP;
4779
4780         /*
4781          * AID and listen_interval properties can be set only for unassociated
4782          * station. Include these parameters here and will check them in
4783          * cfg80211_check_station_change().
4784          */
4785         if (info->attrs[NL80211_ATTR_STA_AID])
4786                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4787
4788         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4789                 params.listen_interval =
4790                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4791         else
4792                 params.listen_interval = -1;
4793
4794         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4795                 u8 tmp;
4796
4797                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4798                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4799                         return -EINVAL;
4800
4801                 params.support_p2p_ps = tmp;
4802         } else {
4803                 params.support_p2p_ps = -1;
4804         }
4805
4806         if (!info->attrs[NL80211_ATTR_MAC])
4807                 return -EINVAL;
4808
4809         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4810
4811         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4812                 params.supported_rates =
4813                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4814                 params.supported_rates_len =
4815                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4816         }
4817
4818         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4819                 params.capability =
4820                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4821                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4822         }
4823
4824         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4825                 params.ext_capab =
4826                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4827                 params.ext_capab_len =
4828                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4829         }
4830
4831         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4832                 return -EINVAL;
4833
4834         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4835                 params.plink_action =
4836                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4837                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4838                         return -EINVAL;
4839         }
4840
4841         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4842                 params.plink_state =
4843                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4844                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4845                         return -EINVAL;
4846                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4847                         params.peer_aid = nla_get_u16(
4848                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4849                         if (params.peer_aid > IEEE80211_MAX_AID)
4850                                 return -EINVAL;
4851                 }
4852                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4853         }
4854
4855         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4856                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4857                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4858
4859                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4860                     pm > NL80211_MESH_POWER_MAX)
4861                         return -EINVAL;
4862
4863                 params.local_pm = pm;
4864         }
4865
4866         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4867                 params.opmode_notif_used = true;
4868                 params.opmode_notif =
4869                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4870         }
4871
4872         /* Include parameters for TDLS peer (will check later) */
4873         err = nl80211_set_station_tdls(info, &params);
4874         if (err)
4875                 return err;
4876
4877         params.vlan = get_vlan(info, rdev);
4878         if (IS_ERR(params.vlan))
4879                 return PTR_ERR(params.vlan);
4880
4881         switch (dev->ieee80211_ptr->iftype) {
4882         case NL80211_IFTYPE_AP:
4883         case NL80211_IFTYPE_AP_VLAN:
4884         case NL80211_IFTYPE_P2P_GO:
4885         case NL80211_IFTYPE_P2P_CLIENT:
4886         case NL80211_IFTYPE_STATION:
4887         case NL80211_IFTYPE_ADHOC:
4888         case NL80211_IFTYPE_MESH_POINT:
4889                 break;
4890         default:
4891                 err = -EOPNOTSUPP;
4892                 goto out_put_vlan;
4893         }
4894
4895         /* driver will call cfg80211_check_station_change() */
4896         err = rdev_change_station(rdev, dev, mac_addr, &params);
4897
4898  out_put_vlan:
4899         if (params.vlan)
4900                 dev_put(params.vlan);
4901
4902         return err;
4903 }
4904
4905 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4906 {
4907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4908         int err;
4909         struct net_device *dev = info->user_ptr[1];
4910         struct station_parameters params;
4911         u8 *mac_addr = NULL;
4912         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4913                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4914
4915         memset(&params, 0, sizeof(params));
4916
4917         if (!rdev->ops->add_station)
4918                 return -EOPNOTSUPP;
4919
4920         if (!info->attrs[NL80211_ATTR_MAC])
4921                 return -EINVAL;
4922
4923         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4924                 return -EINVAL;
4925
4926         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4927                 return -EINVAL;
4928
4929         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4930             !info->attrs[NL80211_ATTR_PEER_AID])
4931                 return -EINVAL;
4932
4933         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4934         params.supported_rates =
4935                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4936         params.supported_rates_len =
4937                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4938         params.listen_interval =
4939                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4940
4941         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4942                 u8 tmp;
4943
4944                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4945                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4946                         return -EINVAL;
4947
4948                 params.support_p2p_ps = tmp;
4949         } else {
4950                 /*
4951                  * if not specified, assume it's supported for P2P GO interface,
4952                  * and is NOT supported for AP interface
4953                  */
4954                 params.support_p2p_ps =
4955                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4956         }
4957
4958         if (info->attrs[NL80211_ATTR_PEER_AID])
4959                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4960         else
4961                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4962         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4963                 return -EINVAL;
4964
4965         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4966                 params.capability =
4967                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4968                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4969         }
4970
4971         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4972                 params.ext_capab =
4973                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4974                 params.ext_capab_len =
4975                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4976         }
4977
4978         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4979                 params.ht_capa =
4980                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4981
4982         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4983                 params.vht_capa =
4984                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4985
4986         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4987                 params.opmode_notif_used = true;
4988                 params.opmode_notif =
4989                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4990         }
4991
4992         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4993                 params.plink_action =
4994                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4995                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4996                         return -EINVAL;
4997         }
4998
4999         err = nl80211_parse_sta_channel_info(info, &params);
5000         if (err)
5001                 return err;
5002
5003         err = nl80211_parse_sta_wme(info, &params);
5004         if (err)
5005                 return err;
5006
5007         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
5008                 return -EINVAL;
5009
5010         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
5011          * as userspace might just pass through the capabilities from the IEs
5012          * directly, rather than enforcing this restriction and returning an
5013          * error in this case.
5014          */
5015         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
5016                 params.ht_capa = NULL;
5017                 params.vht_capa = NULL;
5018         }
5019
5020         /* When you run into this, adjust the code below for the new flag */
5021         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
5022
5023         switch (dev->ieee80211_ptr->iftype) {
5024         case NL80211_IFTYPE_AP:
5025         case NL80211_IFTYPE_AP_VLAN:
5026         case NL80211_IFTYPE_P2P_GO:
5027                 /* ignore WME attributes if iface/sta is not capable */
5028                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
5029                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
5030                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5031
5032                 /* TDLS peers cannot be added */
5033                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5034                     info->attrs[NL80211_ATTR_PEER_AID])
5035                         return -EINVAL;
5036                 /* but don't bother the driver with it */
5037                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
5038
5039                 /* allow authenticated/associated only if driver handles it */
5040                 if (!(rdev->wiphy.features &
5041                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
5042                     params.sta_flags_mask & auth_assoc)
5043                         return -EINVAL;
5044
5045                 /* Older userspace, or userspace wanting to be compatible with
5046                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
5047                  * and assoc flags in the mask, but assumes the station will be
5048                  * added as associated anyway since this was the required driver
5049                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
5050                  * introduced.
5051                  * In order to not bother drivers with this quirk in the API
5052                  * set the flags in both the mask and set for new stations in
5053                  * this case.
5054                  */
5055                 if (!(params.sta_flags_mask & auth_assoc)) {
5056                         params.sta_flags_mask |= auth_assoc;
5057                         params.sta_flags_set |= auth_assoc;
5058                 }
5059
5060                 /* must be last in here for error handling */
5061                 params.vlan = get_vlan(info, rdev);
5062                 if (IS_ERR(params.vlan))
5063                         return PTR_ERR(params.vlan);
5064                 break;
5065         case NL80211_IFTYPE_MESH_POINT:
5066                 /* ignore uAPSD data */
5067                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5068
5069                 /* associated is disallowed */
5070                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
5071                         return -EINVAL;
5072                 /* TDLS peers cannot be added */
5073                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5074                     info->attrs[NL80211_ATTR_PEER_AID])
5075                         return -EINVAL;
5076                 break;
5077         case NL80211_IFTYPE_STATION:
5078         case NL80211_IFTYPE_P2P_CLIENT:
5079                 /* ignore uAPSD data */
5080                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5081
5082                 /* these are disallowed */
5083                 if (params.sta_flags_mask &
5084                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
5085                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
5086                         return -EINVAL;
5087                 /* Only TDLS peers can be added */
5088                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
5089                         return -EINVAL;
5090                 /* Can only add if TDLS ... */
5091                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
5092                         return -EOPNOTSUPP;
5093                 /* ... with external setup is supported */
5094                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
5095                         return -EOPNOTSUPP;
5096                 /*
5097                  * Older wpa_supplicant versions always mark the TDLS peer
5098                  * as authorized, but it shouldn't yet be.
5099                  */
5100                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
5101                 break;
5102         default:
5103                 return -EOPNOTSUPP;
5104         }
5105
5106         /* be aware of params.vlan when changing code here */
5107
5108         err = rdev_add_station(rdev, dev, mac_addr, &params);
5109
5110         if (params.vlan)
5111                 dev_put(params.vlan);
5112         return err;
5113 }
5114
5115 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
5116 {
5117         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5118         struct net_device *dev = info->user_ptr[1];
5119         struct station_del_parameters params;
5120
5121         memset(&params, 0, sizeof(params));
5122
5123         if (info->attrs[NL80211_ATTR_MAC])
5124                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
5125
5126         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5127             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5128             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5129             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5130                 return -EINVAL;
5131
5132         if (!rdev->ops->del_station)
5133                 return -EOPNOTSUPP;
5134
5135         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
5136                 params.subtype =
5137                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
5138                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
5139                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
5140                         return -EINVAL;
5141         } else {
5142                 /* Default to Deauthentication frame */
5143                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
5144         }
5145
5146         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
5147                 params.reason_code =
5148                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5149                 if (params.reason_code == 0)
5150                         return -EINVAL; /* 0 is reserved */
5151         } else {
5152                 /* Default to reason code 2 */
5153                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
5154         }
5155
5156         return rdev_del_station(rdev, dev, &params);
5157 }
5158
5159 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
5160                                 int flags, struct net_device *dev,
5161                                 u8 *dst, u8 *next_hop,
5162                                 struct mpath_info *pinfo)
5163 {
5164         void *hdr;
5165         struct nlattr *pinfoattr;
5166
5167         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
5168         if (!hdr)
5169                 return -1;
5170
5171         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5172             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
5173             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
5174             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
5175                 goto nla_put_failure;
5176
5177         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
5178         if (!pinfoattr)
5179                 goto nla_put_failure;
5180         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
5181             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
5182                         pinfo->frame_qlen))
5183                 goto nla_put_failure;
5184         if (((pinfo->filled & MPATH_INFO_SN) &&
5185              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
5186             ((pinfo->filled & MPATH_INFO_METRIC) &&
5187              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
5188                          pinfo->metric)) ||
5189             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
5190              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
5191                          pinfo->exptime)) ||
5192             ((pinfo->filled & MPATH_INFO_FLAGS) &&
5193              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
5194                         pinfo->flags)) ||
5195             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
5196              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
5197                          pinfo->discovery_timeout)) ||
5198             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
5199              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
5200                         pinfo->discovery_retries)))
5201                 goto nla_put_failure;
5202
5203         nla_nest_end(msg, pinfoattr);
5204
5205         genlmsg_end(msg, hdr);
5206         return 0;
5207
5208  nla_put_failure:
5209         genlmsg_cancel(msg, hdr);
5210         return -EMSGSIZE;
5211 }
5212
5213 static int nl80211_dump_mpath(struct sk_buff *skb,
5214                               struct netlink_callback *cb)
5215 {
5216         struct mpath_info pinfo;
5217         struct cfg80211_registered_device *rdev;
5218         struct wireless_dev *wdev;
5219         u8 dst[ETH_ALEN];
5220         u8 next_hop[ETH_ALEN];
5221         int path_idx = cb->args[2];
5222         int err;
5223
5224         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5225         if (err)
5226                 return err;
5227
5228         if (!rdev->ops->dump_mpath) {
5229                 err = -EOPNOTSUPP;
5230                 goto out_err;
5231         }
5232
5233         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5234                 err = -EOPNOTSUPP;
5235                 goto out_err;
5236         }
5237
5238         while (1) {
5239                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
5240                                       next_hop, &pinfo);
5241                 if (err == -ENOENT)
5242                         break;
5243                 if (err)
5244                         goto out_err;
5245
5246                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5247                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5248                                        wdev->netdev, dst, next_hop,
5249                                        &pinfo) < 0)
5250                         goto out;
5251
5252                 path_idx++;
5253         }
5254
5255  out:
5256         cb->args[2] = path_idx;
5257         err = skb->len;
5258  out_err:
5259         nl80211_finish_wdev_dump(rdev);
5260         return err;
5261 }
5262
5263 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
5264 {
5265         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5266         int err;
5267         struct net_device *dev = info->user_ptr[1];
5268         struct mpath_info pinfo;
5269         struct sk_buff *msg;
5270         u8 *dst = NULL;
5271         u8 next_hop[ETH_ALEN];
5272
5273         memset(&pinfo, 0, sizeof(pinfo));
5274
5275         if (!info->attrs[NL80211_ATTR_MAC])
5276                 return -EINVAL;
5277
5278         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5279
5280         if (!rdev->ops->get_mpath)
5281                 return -EOPNOTSUPP;
5282
5283         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5284                 return -EOPNOTSUPP;
5285
5286         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
5287         if (err)
5288                 return err;
5289
5290         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5291         if (!msg)
5292                 return -ENOMEM;
5293
5294         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5295                                  dev, dst, next_hop, &pinfo) < 0) {
5296                 nlmsg_free(msg);
5297                 return -ENOBUFS;
5298         }
5299
5300         return genlmsg_reply(msg, info);
5301 }
5302
5303 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
5304 {
5305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5306         struct net_device *dev = info->user_ptr[1];
5307         u8 *dst = NULL;
5308         u8 *next_hop = NULL;
5309
5310         if (!info->attrs[NL80211_ATTR_MAC])
5311                 return -EINVAL;
5312
5313         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5314                 return -EINVAL;
5315
5316         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5317         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5318
5319         if (!rdev->ops->change_mpath)
5320                 return -EOPNOTSUPP;
5321
5322         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5323                 return -EOPNOTSUPP;
5324
5325         return rdev_change_mpath(rdev, dev, dst, next_hop);
5326 }
5327
5328 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
5329 {
5330         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5331         struct net_device *dev = info->user_ptr[1];
5332         u8 *dst = NULL;
5333         u8 *next_hop = NULL;
5334
5335         if (!info->attrs[NL80211_ATTR_MAC])
5336                 return -EINVAL;
5337
5338         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5339                 return -EINVAL;
5340
5341         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5342         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5343
5344         if (!rdev->ops->add_mpath)
5345                 return -EOPNOTSUPP;
5346
5347         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5348                 return -EOPNOTSUPP;
5349
5350         return rdev_add_mpath(rdev, dev, dst, next_hop);
5351 }
5352
5353 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
5354 {
5355         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5356         struct net_device *dev = info->user_ptr[1];
5357         u8 *dst = NULL;
5358
5359         if (info->attrs[NL80211_ATTR_MAC])
5360                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5361
5362         if (!rdev->ops->del_mpath)
5363                 return -EOPNOTSUPP;
5364
5365         return rdev_del_mpath(rdev, dev, dst);
5366 }
5367
5368 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
5369 {
5370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5371         int err;
5372         struct net_device *dev = info->user_ptr[1];
5373         struct mpath_info pinfo;
5374         struct sk_buff *msg;
5375         u8 *dst = NULL;
5376         u8 mpp[ETH_ALEN];
5377
5378         memset(&pinfo, 0, sizeof(pinfo));
5379
5380         if (!info->attrs[NL80211_ATTR_MAC])
5381                 return -EINVAL;
5382
5383         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5384
5385         if (!rdev->ops->get_mpp)
5386                 return -EOPNOTSUPP;
5387
5388         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5389                 return -EOPNOTSUPP;
5390
5391         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
5392         if (err)
5393                 return err;
5394
5395         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5396         if (!msg)
5397                 return -ENOMEM;
5398
5399         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5400                                dev, dst, mpp, &pinfo) < 0) {
5401                 nlmsg_free(msg);
5402                 return -ENOBUFS;
5403         }
5404
5405         return genlmsg_reply(msg, info);
5406 }
5407
5408 static int nl80211_dump_mpp(struct sk_buff *skb,
5409                             struct netlink_callback *cb)
5410 {
5411         struct mpath_info pinfo;
5412         struct cfg80211_registered_device *rdev;
5413         struct wireless_dev *wdev;
5414         u8 dst[ETH_ALEN];
5415         u8 mpp[ETH_ALEN];
5416         int path_idx = cb->args[2];
5417         int err;
5418
5419         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5420         if (err)
5421                 return err;
5422
5423         if (!rdev->ops->dump_mpp) {
5424                 err = -EOPNOTSUPP;
5425                 goto out_err;
5426         }
5427
5428         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5429                 err = -EOPNOTSUPP;
5430                 goto out_err;
5431         }
5432
5433         while (1) {
5434                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5435                                     mpp, &pinfo);
5436                 if (err == -ENOENT)
5437                         break;
5438                 if (err)
5439                         goto out_err;
5440
5441                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5442                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5443                                        wdev->netdev, dst, mpp,
5444                                        &pinfo) < 0)
5445                         goto out;
5446
5447                 path_idx++;
5448         }
5449
5450  out:
5451         cb->args[2] = path_idx;
5452         err = skb->len;
5453  out_err:
5454         nl80211_finish_wdev_dump(rdev);
5455         return err;
5456 }
5457
5458 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5459 {
5460         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5461         struct net_device *dev = info->user_ptr[1];
5462         struct wireless_dev *wdev = dev->ieee80211_ptr;
5463         struct bss_parameters params;
5464         int err;
5465
5466         memset(&params, 0, sizeof(params));
5467         /* default to not changing parameters */
5468         params.use_cts_prot = -1;
5469         params.use_short_preamble = -1;
5470         params.use_short_slot_time = -1;
5471         params.ap_isolate = -1;
5472         params.ht_opmode = -1;
5473         params.p2p_ctwindow = -1;
5474         params.p2p_opp_ps = -1;
5475
5476         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5477                 params.use_cts_prot =
5478                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5479         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5480                 params.use_short_preamble =
5481                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5482         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5483                 params.use_short_slot_time =
5484                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5485         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5486                 params.basic_rates =
5487                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5488                 params.basic_rates_len =
5489                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5490         }
5491         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5492                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5493         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5494                 params.ht_opmode =
5495                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5496
5497         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5498                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5499                         return -EINVAL;
5500                 params.p2p_ctwindow =
5501                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5502                 if (params.p2p_ctwindow < 0)
5503                         return -EINVAL;
5504                 if (params.p2p_ctwindow != 0 &&
5505                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5506                         return -EINVAL;
5507         }
5508
5509         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5510                 u8 tmp;
5511
5512                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5513                         return -EINVAL;
5514                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5515                 if (tmp > 1)
5516                         return -EINVAL;
5517                 params.p2p_opp_ps = tmp;
5518                 if (params.p2p_opp_ps &&
5519                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5520                         return -EINVAL;
5521         }
5522
5523         if (!rdev->ops->change_bss)
5524                 return -EOPNOTSUPP;
5525
5526         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5527             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5528                 return -EOPNOTSUPP;
5529
5530         wdev_lock(wdev);
5531         err = rdev_change_bss(rdev, dev, &params);
5532         wdev_unlock(wdev);
5533
5534         return err;
5535 }
5536
5537 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5538 {
5539         char *data = NULL;
5540         bool is_indoor;
5541         enum nl80211_user_reg_hint_type user_reg_hint_type;
5542         u32 owner_nlportid;
5543
5544         /*
5545          * You should only get this when cfg80211 hasn't yet initialized
5546          * completely when built-in to the kernel right between the time
5547          * window between nl80211_init() and regulatory_init(), if that is
5548          * even possible.
5549          */
5550         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5551                 return -EINPROGRESS;
5552
5553         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5554                 user_reg_hint_type =
5555                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5556         else
5557                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5558
5559         switch (user_reg_hint_type) {
5560         case NL80211_USER_REG_HINT_USER:
5561         case NL80211_USER_REG_HINT_CELL_BASE:
5562                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5563                         return -EINVAL;
5564
5565                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5566                 return regulatory_hint_user(data, user_reg_hint_type);
5567         case NL80211_USER_REG_HINT_INDOOR:
5568                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5569                         owner_nlportid = info->snd_portid;
5570                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5571                 } else {
5572                         owner_nlportid = 0;
5573                         is_indoor = true;
5574                 }
5575
5576                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5577         default:
5578                 return -EINVAL;
5579         }
5580 }
5581
5582 static int nl80211_get_mesh_config(struct sk_buff *skb,
5583                                    struct genl_info *info)
5584 {
5585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5586         struct net_device *dev = info->user_ptr[1];
5587         struct wireless_dev *wdev = dev->ieee80211_ptr;
5588         struct mesh_config cur_params;
5589         int err = 0;
5590         void *hdr;
5591         struct nlattr *pinfoattr;
5592         struct sk_buff *msg;
5593
5594         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5595                 return -EOPNOTSUPP;
5596
5597         if (!rdev->ops->get_mesh_config)
5598                 return -EOPNOTSUPP;
5599
5600         wdev_lock(wdev);
5601         /* If not connected, get default parameters */
5602         if (!wdev->mesh_id_len)
5603                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5604         else
5605                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5606         wdev_unlock(wdev);
5607
5608         if (err)
5609                 return err;
5610
5611         /* Draw up a netlink message to send back */
5612         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5613         if (!msg)
5614                 return -ENOMEM;
5615         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5616                              NL80211_CMD_GET_MESH_CONFIG);
5617         if (!hdr)
5618                 goto out;
5619         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5620         if (!pinfoattr)
5621                 goto nla_put_failure;
5622         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5623             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5624                         cur_params.dot11MeshRetryTimeout) ||
5625             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5626                         cur_params.dot11MeshConfirmTimeout) ||
5627             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5628                         cur_params.dot11MeshHoldingTimeout) ||
5629             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5630                         cur_params.dot11MeshMaxPeerLinks) ||
5631             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5632                        cur_params.dot11MeshMaxRetries) ||
5633             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5634                        cur_params.dot11MeshTTL) ||
5635             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5636                        cur_params.element_ttl) ||
5637             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5638                        cur_params.auto_open_plinks) ||
5639             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5640                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5641             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5642                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5643             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5644                         cur_params.path_refresh_time) ||
5645             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5646                         cur_params.min_discovery_timeout) ||
5647             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5648                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5649             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5650                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5651             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5652                         cur_params.dot11MeshHWMPperrMinInterval) ||
5653             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5654                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5655             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5656                        cur_params.dot11MeshHWMPRootMode) ||
5657             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5658                         cur_params.dot11MeshHWMPRannInterval) ||
5659             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5660                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5661             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5662                        cur_params.dot11MeshForwarding) ||
5663             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5664                         cur_params.rssi_threshold) ||
5665             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5666                         cur_params.ht_opmode) ||
5667             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5668                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5669             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5670                         cur_params.dot11MeshHWMProotInterval) ||
5671             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5672                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5673             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5674                         cur_params.power_mode) ||
5675             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5676                         cur_params.dot11MeshAwakeWindowDuration) ||
5677             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5678                         cur_params.plink_timeout))
5679                 goto nla_put_failure;
5680         nla_nest_end(msg, pinfoattr);
5681         genlmsg_end(msg, hdr);
5682         return genlmsg_reply(msg, info);
5683
5684  nla_put_failure:
5685         genlmsg_cancel(msg, hdr);
5686  out:
5687         nlmsg_free(msg);
5688         return -ENOBUFS;
5689 }
5690
5691 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5692         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5693         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5694         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5695         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5696         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5697         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5698         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5699         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5700         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5701         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5702         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5703         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5704         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5705         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5706         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5707         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5708         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5709         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5710         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5711         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5712         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5713         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5714         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5715         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5716         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5717         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5718         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5719         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5720 };
5721
5722 static const struct nla_policy
5723         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5724         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5725         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5726         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5727         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5728         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5729         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5730         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5731                                     .len = IEEE80211_MAX_DATA_LEN },
5732         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5733 };
5734
5735 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5736 {
5737         u8 val = nla_get_u8(nla);
5738         if (val < min || val > max)
5739                 return -EINVAL;
5740         *out = val;
5741         return 0;
5742 }
5743
5744 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5745 {
5746         u8 val = nla_get_u8(nla);
5747         if (val < min || val > max)
5748                 return -EINVAL;
5749         *out = val;
5750         return 0;
5751 }
5752
5753 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5754 {
5755         u16 val = nla_get_u16(nla);
5756         if (val < min || val > max)
5757                 return -EINVAL;
5758         *out = val;
5759         return 0;
5760 }
5761
5762 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5763 {
5764         u32 val = nla_get_u32(nla);
5765         if (val < min || val > max)
5766                 return -EINVAL;
5767         *out = val;
5768         return 0;
5769 }
5770
5771 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5772 {
5773         s32 val = nla_get_s32(nla);
5774         if (val < min || val > max)
5775                 return -EINVAL;
5776         *out = val;
5777         return 0;
5778 }
5779
5780 static int nl80211_check_power_mode(const struct nlattr *nla,
5781                                     enum nl80211_mesh_power_mode min,
5782                                     enum nl80211_mesh_power_mode max,
5783                                     enum nl80211_mesh_power_mode *out)
5784 {
5785         u32 val = nla_get_u32(nla);
5786         if (val < min || val > max)
5787                 return -EINVAL;
5788         *out = val;
5789         return 0;
5790 }
5791
5792 static int nl80211_parse_mesh_config(struct genl_info *info,
5793                                      struct mesh_config *cfg,
5794                                      u32 *mask_out)
5795 {
5796         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5797         u32 mask = 0;
5798         u16 ht_opmode;
5799
5800 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5801 do {                                                                        \
5802         if (tb[attr]) {                                                     \
5803                 if (fn(tb[attr], min, max, &cfg->param))                    \
5804                         return -EINVAL;                                     \
5805                 mask |= (1 << (attr - 1));                                  \
5806         }                                                                   \
5807 } while (0)
5808
5809         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5810                 return -EINVAL;
5811         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5812                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5813                              nl80211_meshconf_params_policy))
5814                 return -EINVAL;
5815
5816         /* This makes sure that there aren't more than 32 mesh config
5817          * parameters (otherwise our bitfield scheme would not work.) */
5818         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5819
5820         /* Fill in the params struct */
5821         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5822                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5823                                   nl80211_check_u16);
5824         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5825                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5826                                   nl80211_check_u16);
5827         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5828                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5829                                   nl80211_check_u16);
5830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5831                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5832                                   nl80211_check_u16);
5833         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5834                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5835                                   nl80211_check_u8);
5836         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5837                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5838         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5839                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5840                                   nl80211_check_u8);
5841         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5842                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5843                                   nl80211_check_bool);
5844         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5845                                   1, 255, mask,
5846                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5847                                   nl80211_check_u32);
5848         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5849                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5850                                   nl80211_check_u8);
5851         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5852                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5853                                   nl80211_check_u32);
5854         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5855                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5856                                   nl80211_check_u16);
5857         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5858                                   1, 65535, mask,
5859                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5860                                   nl80211_check_u32);
5861         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5862                                   1, 65535, mask,
5863                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5864                                   nl80211_check_u16);
5865         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5866                                   1, 65535, mask,
5867                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5868                                   nl80211_check_u16);
5869         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5870                                   dot11MeshHWMPnetDiameterTraversalTime,
5871                                   1, 65535, mask,
5872                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5873                                   nl80211_check_u16);
5874         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5875                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5876                                   nl80211_check_u8);
5877         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5878                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5879                                   nl80211_check_u16);
5880         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5881                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5882                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5883                                   nl80211_check_bool);
5884         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5885                                   mask, NL80211_MESHCONF_FORWARDING,
5886                                   nl80211_check_bool);
5887         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5888                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5889                                   nl80211_check_s32);
5890         /*
5891          * Check HT operation mode based on
5892          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5893          */
5894         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5895                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5896
5897                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5898                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5899                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5900                         return -EINVAL;
5901
5902                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5903                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5904                         return -EINVAL;
5905
5906                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5907                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5908                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5909                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
5910                                 return -EINVAL;
5911                         break;
5912                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
5913                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
5914                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5915                                 return -EINVAL;
5916                         break;
5917                 }
5918                 cfg->ht_opmode = ht_opmode;
5919         }
5920         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5921                                   1, 65535, mask,
5922                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5923                                   nl80211_check_u32);
5924         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5925                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5926                                   nl80211_check_u16);
5927         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5928                                   dot11MeshHWMPconfirmationInterval,
5929                                   1, 65535, mask,
5930                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5931                                   nl80211_check_u16);
5932         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5933                                   NL80211_MESH_POWER_ACTIVE,
5934                                   NL80211_MESH_POWER_MAX,
5935                                   mask, NL80211_MESHCONF_POWER_MODE,
5936                                   nl80211_check_power_mode);
5937         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5938                                   0, 65535, mask,
5939                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5940         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5941                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5942                                   nl80211_check_u32);
5943         if (mask_out)
5944                 *mask_out = mask;
5945
5946         return 0;
5947
5948 #undef FILL_IN_MESH_PARAM_IF_SET
5949 }
5950
5951 static int nl80211_parse_mesh_setup(struct genl_info *info,
5952                                      struct mesh_setup *setup)
5953 {
5954         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5955         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5956
5957         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5958                 return -EINVAL;
5959         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5960                              info->attrs[NL80211_ATTR_MESH_SETUP],
5961                              nl80211_mesh_setup_params_policy))
5962                 return -EINVAL;
5963
5964         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5965                 setup->sync_method =
5966                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5967                  IEEE80211_SYNC_METHOD_VENDOR :
5968                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5969
5970         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5971                 setup->path_sel_proto =
5972                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5973                  IEEE80211_PATH_PROTOCOL_VENDOR :
5974                  IEEE80211_PATH_PROTOCOL_HWMP;
5975
5976         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5977                 setup->path_metric =
5978                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5979                  IEEE80211_PATH_METRIC_VENDOR :
5980                  IEEE80211_PATH_METRIC_AIRTIME;
5981
5982         if (tb[NL80211_MESH_SETUP_IE]) {
5983                 struct nlattr *ieattr =
5984                         tb[NL80211_MESH_SETUP_IE];
5985                 if (!is_valid_ie_attr(ieattr))
5986                         return -EINVAL;
5987                 setup->ie = nla_data(ieattr);
5988                 setup->ie_len = nla_len(ieattr);
5989         }
5990         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5991             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5992                 return -EINVAL;
5993         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5994         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5995         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5996         if (setup->is_secure)
5997                 setup->user_mpm = true;
5998
5999         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
6000                 if (!setup->user_mpm)
6001                         return -EINVAL;
6002                 setup->auth_id =
6003                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
6004         }
6005
6006         return 0;
6007 }
6008
6009 static int nl80211_update_mesh_config(struct sk_buff *skb,
6010                                       struct genl_info *info)
6011 {
6012         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6013         struct net_device *dev = info->user_ptr[1];
6014         struct wireless_dev *wdev = dev->ieee80211_ptr;
6015         struct mesh_config cfg;
6016         u32 mask;
6017         int err;
6018
6019         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
6020                 return -EOPNOTSUPP;
6021
6022         if (!rdev->ops->update_mesh_config)
6023                 return -EOPNOTSUPP;
6024
6025         err = nl80211_parse_mesh_config(info, &cfg, &mask);
6026         if (err)
6027                 return err;
6028
6029         wdev_lock(wdev);
6030         if (!wdev->mesh_id_len)
6031                 err = -ENOLINK;
6032
6033         if (!err)
6034                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
6035
6036         wdev_unlock(wdev);
6037
6038         return err;
6039 }
6040
6041 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
6042                               struct sk_buff *msg)
6043 {
6044         struct nlattr *nl_reg_rules;
6045         unsigned int i;
6046
6047         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
6048             (regdom->dfs_region &&
6049              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
6050                 goto nla_put_failure;
6051
6052         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
6053         if (!nl_reg_rules)
6054                 goto nla_put_failure;
6055
6056         for (i = 0; i < regdom->n_reg_rules; i++) {
6057                 struct nlattr *nl_reg_rule;
6058                 const struct ieee80211_reg_rule *reg_rule;
6059                 const struct ieee80211_freq_range *freq_range;
6060                 const struct ieee80211_power_rule *power_rule;
6061                 unsigned int max_bandwidth_khz;
6062
6063                 reg_rule = &regdom->reg_rules[i];
6064                 freq_range = &reg_rule->freq_range;
6065                 power_rule = &reg_rule->power_rule;
6066
6067                 nl_reg_rule = nla_nest_start(msg, i);
6068                 if (!nl_reg_rule)
6069                         goto nla_put_failure;
6070
6071                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
6072                 if (!max_bandwidth_khz)
6073                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
6074                                                                   reg_rule);
6075
6076                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
6077                                 reg_rule->flags) ||
6078                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
6079                                 freq_range->start_freq_khz) ||
6080                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
6081                                 freq_range->end_freq_khz) ||
6082                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
6083                                 max_bandwidth_khz) ||
6084                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
6085                                 power_rule->max_antenna_gain) ||
6086                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
6087                                 power_rule->max_eirp) ||
6088                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
6089                                 reg_rule->dfs_cac_ms))
6090                         goto nla_put_failure;
6091
6092                 nla_nest_end(msg, nl_reg_rule);
6093         }
6094
6095         nla_nest_end(msg, nl_reg_rules);
6096         return 0;
6097
6098 nla_put_failure:
6099         return -EMSGSIZE;
6100 }
6101
6102 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
6103 {
6104         const struct ieee80211_regdomain *regdom = NULL;
6105         struct cfg80211_registered_device *rdev;
6106         struct wiphy *wiphy = NULL;
6107         struct sk_buff *msg;
6108         void *hdr;
6109
6110         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6111         if (!msg)
6112                 return -ENOBUFS;
6113
6114         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6115                              NL80211_CMD_GET_REG);
6116         if (!hdr)
6117                 goto put_failure;
6118
6119         if (info->attrs[NL80211_ATTR_WIPHY]) {
6120                 bool self_managed;
6121
6122                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6123                 if (IS_ERR(rdev)) {
6124                         nlmsg_free(msg);
6125                         return PTR_ERR(rdev);
6126                 }
6127
6128                 wiphy = &rdev->wiphy;
6129                 self_managed = wiphy->regulatory_flags &
6130                                REGULATORY_WIPHY_SELF_MANAGED;
6131                 regdom = get_wiphy_regdom(wiphy);
6132
6133                 /* a self-managed-reg device must have a private regdom */
6134                 if (WARN_ON(!regdom && self_managed)) {
6135                         nlmsg_free(msg);
6136                         return -EINVAL;
6137                 }
6138
6139                 if (regdom &&
6140                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6141                         goto nla_put_failure;
6142         }
6143
6144         if (!wiphy && reg_last_request_cell_base() &&
6145             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6146                         NL80211_USER_REG_HINT_CELL_BASE))
6147                 goto nla_put_failure;
6148
6149         rcu_read_lock();
6150
6151         if (!regdom)
6152                 regdom = rcu_dereference(cfg80211_regdomain);
6153
6154         if (nl80211_put_regdom(regdom, msg))
6155                 goto nla_put_failure_rcu;
6156
6157         rcu_read_unlock();
6158
6159         genlmsg_end(msg, hdr);
6160         return genlmsg_reply(msg, info);
6161
6162 nla_put_failure_rcu:
6163         rcu_read_unlock();
6164 nla_put_failure:
6165         genlmsg_cancel(msg, hdr);
6166 put_failure:
6167         nlmsg_free(msg);
6168         return -EMSGSIZE;
6169 }
6170
6171 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
6172                                u32 seq, int flags, struct wiphy *wiphy,
6173                                const struct ieee80211_regdomain *regdom)
6174 {
6175         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6176                                    NL80211_CMD_GET_REG);
6177
6178         if (!hdr)
6179                 return -1;
6180
6181         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6182
6183         if (nl80211_put_regdom(regdom, msg))
6184                 goto nla_put_failure;
6185
6186         if (!wiphy && reg_last_request_cell_base() &&
6187             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6188                         NL80211_USER_REG_HINT_CELL_BASE))
6189                 goto nla_put_failure;
6190
6191         if (wiphy &&
6192             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6193                 goto nla_put_failure;
6194
6195         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
6196             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
6197                 goto nla_put_failure;
6198
6199         genlmsg_end(msg, hdr);
6200         return 0;
6201
6202 nla_put_failure:
6203         genlmsg_cancel(msg, hdr);
6204         return -EMSGSIZE;
6205 }
6206
6207 static int nl80211_get_reg_dump(struct sk_buff *skb,
6208                                 struct netlink_callback *cb)
6209 {
6210         const struct ieee80211_regdomain *regdom = NULL;
6211         struct cfg80211_registered_device *rdev;
6212         int err, reg_idx, start = cb->args[2];
6213
6214         rtnl_lock();
6215
6216         if (cfg80211_regdomain && start == 0) {
6217                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6218                                           NLM_F_MULTI, NULL,
6219                                           rtnl_dereference(cfg80211_regdomain));
6220                 if (err < 0)
6221                         goto out_err;
6222         }
6223
6224         /* the global regdom is idx 0 */
6225         reg_idx = 1;
6226         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
6227                 regdom = get_wiphy_regdom(&rdev->wiphy);
6228                 if (!regdom)
6229                         continue;
6230
6231                 if (++reg_idx <= start)
6232                         continue;
6233
6234                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6235                                           NLM_F_MULTI, &rdev->wiphy, regdom);
6236                 if (err < 0) {
6237                         reg_idx--;
6238                         break;
6239                 }
6240         }
6241
6242         cb->args[2] = reg_idx;
6243         err = skb->len;
6244 out_err:
6245         rtnl_unlock();
6246         return err;
6247 }
6248
6249 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
6250 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
6251         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
6252         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
6253         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
6254         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
6255         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
6256         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
6257         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
6258 };
6259
6260 static int parse_reg_rule(struct nlattr *tb[],
6261         struct ieee80211_reg_rule *reg_rule)
6262 {
6263         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
6264         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
6265
6266         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
6267                 return -EINVAL;
6268         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
6269                 return -EINVAL;
6270         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
6271                 return -EINVAL;
6272         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
6273                 return -EINVAL;
6274         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
6275                 return -EINVAL;
6276
6277         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
6278
6279         freq_range->start_freq_khz =
6280                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
6281         freq_range->end_freq_khz =
6282                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
6283         freq_range->max_bandwidth_khz =
6284                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
6285
6286         power_rule->max_eirp =
6287                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
6288
6289         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
6290                 power_rule->max_antenna_gain =
6291                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
6292
6293         if (tb[NL80211_ATTR_DFS_CAC_TIME])
6294                 reg_rule->dfs_cac_ms =
6295                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
6296
6297         return 0;
6298 }
6299
6300 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
6301 {
6302         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
6303         struct nlattr *nl_reg_rule;
6304         char *alpha2;
6305         int rem_reg_rules, r;
6306         u32 num_rules = 0, rule_idx = 0, size_of_regd;
6307         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
6308         struct ieee80211_regdomain *rd;
6309
6310         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
6311                 return -EINVAL;
6312
6313         if (!info->attrs[NL80211_ATTR_REG_RULES])
6314                 return -EINVAL;
6315
6316         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
6317
6318         if (info->attrs[NL80211_ATTR_DFS_REGION])
6319                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
6320
6321         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6322                             rem_reg_rules) {
6323                 num_rules++;
6324                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
6325                         return -EINVAL;
6326         }
6327
6328         if (!reg_is_valid_request(alpha2))
6329                 return -EINVAL;
6330
6331         size_of_regd = sizeof(struct ieee80211_regdomain) +
6332                        num_rules * sizeof(struct ieee80211_reg_rule);
6333
6334         rd = kzalloc(size_of_regd, GFP_KERNEL);
6335         if (!rd)
6336                 return -ENOMEM;
6337
6338         rd->n_reg_rules = num_rules;
6339         rd->alpha2[0] = alpha2[0];
6340         rd->alpha2[1] = alpha2[1];
6341
6342         /*
6343          * Disable DFS master mode if the DFS region was
6344          * not supported or known on this kernel.
6345          */
6346         if (reg_supported_dfs_region(dfs_region))
6347                 rd->dfs_region = dfs_region;
6348
6349         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6350                             rem_reg_rules) {
6351                 r = nla_parse_nested(tb, NL80211_REG_RULE_ATTR_MAX,
6352                                      nl_reg_rule, reg_rule_policy);
6353                 if (r)
6354                         goto bad_reg;
6355                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
6356                 if (r)
6357                         goto bad_reg;
6358
6359                 rule_idx++;
6360
6361                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
6362                         r = -EINVAL;
6363                         goto bad_reg;
6364                 }
6365         }
6366
6367         /* set_regdom takes ownership of rd */
6368         return set_regdom(rd, REGD_SOURCE_CRDA);
6369  bad_reg:
6370         kfree(rd);
6371         return r;
6372 }
6373 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
6374
6375 static int validate_scan_freqs(struct nlattr *freqs)
6376 {
6377         struct nlattr *attr1, *attr2;
6378         int n_channels = 0, tmp1, tmp2;
6379
6380         nla_for_each_nested(attr1, freqs, tmp1) {
6381                 n_channels++;
6382                 /*
6383                  * Some hardware has a limited channel list for
6384                  * scanning, and it is pretty much nonsensical
6385                  * to scan for a channel twice, so disallow that
6386                  * and don't require drivers to check that the
6387                  * channel list they get isn't longer than what
6388                  * they can scan, as long as they can scan all
6389                  * the channels they registered at once.
6390                  */
6391                 nla_for_each_nested(attr2, freqs, tmp2)
6392                         if (attr1 != attr2 &&
6393                             nla_get_u32(attr1) == nla_get_u32(attr2))
6394                                 return 0;
6395         }
6396
6397         return n_channels;
6398 }
6399
6400 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
6401 {
6402         return b < NUM_NL80211_BANDS && wiphy->bands[b];
6403 }
6404
6405 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
6406                             struct cfg80211_bss_selection *bss_select)
6407 {
6408         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
6409         struct nlattr *nest;
6410         int err;
6411         bool found = false;
6412         int i;
6413
6414         /* only process one nested attribute */
6415         nest = nla_data(nla);
6416         if (!nla_ok(nest, nla_len(nest)))
6417                 return -EINVAL;
6418
6419         err = nla_parse_nested(attr, NL80211_BSS_SELECT_ATTR_MAX, nest,
6420                                nl80211_bss_select_policy);
6421         if (err)
6422                 return err;
6423
6424         /* only one attribute may be given */
6425         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6426                 if (attr[i]) {
6427                         if (found)
6428                                 return -EINVAL;
6429                         found = true;
6430                 }
6431         }
6432
6433         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6434
6435         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6436                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6437
6438         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6439                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6440                 bss_select->param.band_pref =
6441                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6442                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6443                         return -EINVAL;
6444         }
6445
6446         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6447                 struct nl80211_bss_select_rssi_adjust *adj_param;
6448
6449                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6450                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6451                 bss_select->param.adjust.band = adj_param->band;
6452                 bss_select->param.adjust.delta = adj_param->delta;
6453                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6454                         return -EINVAL;
6455         }
6456
6457         /* user-space did not provide behaviour attribute */
6458         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6459                 return -EINVAL;
6460
6461         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6462                 return -EINVAL;
6463
6464         return 0;
6465 }
6466
6467 static int nl80211_parse_random_mac(struct nlattr **attrs,
6468                                     u8 *mac_addr, u8 *mac_addr_mask)
6469 {
6470         int i;
6471
6472         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6473                 eth_zero_addr(mac_addr);
6474                 eth_zero_addr(mac_addr_mask);
6475                 mac_addr[0] = 0x2;
6476                 mac_addr_mask[0] = 0x3;
6477
6478                 return 0;
6479         }
6480
6481         /* need both or none */
6482         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6483                 return -EINVAL;
6484
6485         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6486         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6487
6488         /* don't allow or configure an mcast address */
6489         if (!is_multicast_ether_addr(mac_addr_mask) ||
6490             is_multicast_ether_addr(mac_addr))
6491                 return -EINVAL;
6492
6493         /*
6494          * allow users to pass a MAC address that has bits set outside
6495          * of the mask, but don't bother drivers with having to deal
6496          * with such bits
6497          */
6498         for (i = 0; i < ETH_ALEN; i++)
6499                 mac_addr[i] &= mac_addr_mask[i];
6500
6501         return 0;
6502 }
6503
6504 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6505 {
6506         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6507         struct wireless_dev *wdev = info->user_ptr[1];
6508         struct cfg80211_scan_request *request;
6509         struct nlattr *attr;
6510         struct wiphy *wiphy;
6511         int err, tmp, n_ssids = 0, n_channels, i;
6512         size_t ie_len;
6513
6514         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6515                 return -EINVAL;
6516
6517         wiphy = &rdev->wiphy;
6518
6519         if (wdev->iftype == NL80211_IFTYPE_NAN)
6520                 return -EOPNOTSUPP;
6521
6522         if (!rdev->ops->scan)
6523                 return -EOPNOTSUPP;
6524
6525         if (rdev->scan_req || rdev->scan_msg) {
6526                 err = -EBUSY;
6527                 goto unlock;
6528         }
6529
6530         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6531                 n_channels = validate_scan_freqs(
6532                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6533                 if (!n_channels) {
6534                         err = -EINVAL;
6535                         goto unlock;
6536                 }
6537         } else {
6538                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6539         }
6540
6541         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6542                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6543                         n_ssids++;
6544
6545         if (n_ssids > wiphy->max_scan_ssids) {
6546                 err = -EINVAL;
6547                 goto unlock;
6548         }
6549
6550         if (info->attrs[NL80211_ATTR_IE])
6551                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6552         else
6553                 ie_len = 0;
6554
6555         if (ie_len > wiphy->max_scan_ie_len) {
6556                 err = -EINVAL;
6557                 goto unlock;
6558         }
6559
6560         request = kzalloc(sizeof(*request)
6561                         + sizeof(*request->ssids) * n_ssids
6562                         + sizeof(*request->channels) * n_channels
6563                         + ie_len, GFP_KERNEL);
6564         if (!request) {
6565                 err = -ENOMEM;
6566                 goto unlock;
6567         }
6568
6569         if (n_ssids)
6570                 request->ssids = (void *)&request->channels[n_channels];
6571         request->n_ssids = n_ssids;
6572         if (ie_len) {
6573                 if (n_ssids)
6574                         request->ie = (void *)(request->ssids + n_ssids);
6575                 else
6576                         request->ie = (void *)(request->channels + n_channels);
6577         }
6578
6579         i = 0;
6580         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6581                 /* user specified, bail out if channel not found */
6582                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6583                         struct ieee80211_channel *chan;
6584
6585                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6586
6587                         if (!chan) {
6588                                 err = -EINVAL;
6589                                 goto out_free;
6590                         }
6591
6592                         /* ignore disabled channels */
6593                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6594                                 continue;
6595
6596                         request->channels[i] = chan;
6597                         i++;
6598                 }
6599         } else {
6600                 enum nl80211_band band;
6601
6602                 /* all channels */
6603                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6604                         int j;
6605
6606                         if (!wiphy->bands[band])
6607                                 continue;
6608                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6609                                 struct ieee80211_channel *chan;
6610
6611                                 chan = &wiphy->bands[band]->channels[j];
6612
6613                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6614                                         continue;
6615
6616                                 request->channels[i] = chan;
6617                                 i++;
6618                         }
6619                 }
6620         }
6621
6622         if (!i) {
6623                 err = -EINVAL;
6624                 goto out_free;
6625         }
6626
6627         request->n_channels = i;
6628
6629         i = 0;
6630         if (n_ssids) {
6631                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6632                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6633                                 err = -EINVAL;
6634                                 goto out_free;
6635                         }
6636                         request->ssids[i].ssid_len = nla_len(attr);
6637                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6638                         i++;
6639                 }
6640         }
6641
6642         if (info->attrs[NL80211_ATTR_IE]) {
6643                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6644                 memcpy((void *)request->ie,
6645                        nla_data(info->attrs[NL80211_ATTR_IE]),
6646                        request->ie_len);
6647         }
6648
6649         for (i = 0; i < NUM_NL80211_BANDS; i++)
6650                 if (wiphy->bands[i])
6651                         request->rates[i] =
6652                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6653
6654         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6655                 nla_for_each_nested(attr,
6656                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6657                                     tmp) {
6658                         enum nl80211_band band = nla_type(attr);
6659
6660                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6661                                 err = -EINVAL;
6662                                 goto out_free;
6663                         }
6664
6665                         if (!wiphy->bands[band])
6666                                 continue;
6667
6668                         err = ieee80211_get_ratemask(wiphy->bands[band],
6669                                                      nla_data(attr),
6670                                                      nla_len(attr),
6671                                                      &request->rates[band]);
6672                         if (err)
6673                                 goto out_free;
6674                 }
6675         }
6676
6677         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6678                 if (!wiphy_ext_feature_isset(wiphy,
6679                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6680                         err = -EOPNOTSUPP;
6681                         goto out_free;
6682                 }
6683
6684                 request->duration =
6685                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6686                 request->duration_mandatory =
6687                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6688         }
6689
6690         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6691                 request->flags = nla_get_u32(
6692                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6693                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6694                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6695                         err = -EOPNOTSUPP;
6696                         goto out_free;
6697                 }
6698
6699                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6700                         if (!(wiphy->features &
6701                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6702                                 err = -EOPNOTSUPP;
6703                                 goto out_free;
6704                         }
6705
6706                         if (wdev->current_bss) {
6707                                 err = -EOPNOTSUPP;
6708                                 goto out_free;
6709                         }
6710
6711                         err = nl80211_parse_random_mac(info->attrs,
6712                                                        request->mac_addr,
6713                                                        request->mac_addr_mask);
6714                         if (err)
6715                                 goto out_free;
6716                 }
6717         }
6718
6719         request->no_cck =
6720                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6721
6722         /* Initial implementation used NL80211_ATTR_MAC to set the specific
6723          * BSSID to scan for. This was problematic because that same attribute
6724          * was already used for another purpose (local random MAC address). The
6725          * NL80211_ATTR_BSSID attribute was added to fix this. For backwards
6726          * compatibility with older userspace components, also use the
6727          * NL80211_ATTR_MAC value here if it can be determined to be used for
6728          * the specific BSSID use case instead of the random MAC address
6729          * (NL80211_ATTR_SCAN_FLAGS is used to enable random MAC address use).
6730          */
6731         if (info->attrs[NL80211_ATTR_BSSID])
6732                 memcpy(request->bssid,
6733                        nla_data(info->attrs[NL80211_ATTR_BSSID]), ETH_ALEN);
6734         else if (!(request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) &&
6735                  info->attrs[NL80211_ATTR_MAC])
6736                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6737                        ETH_ALEN);
6738         else
6739                 eth_broadcast_addr(request->bssid);
6740
6741         request->wdev = wdev;
6742         request->wiphy = &rdev->wiphy;
6743         request->scan_start = jiffies;
6744
6745         rdev->scan_req = request;
6746         err = rdev_scan(rdev, request);
6747
6748         if (!err) {
6749                 nl80211_send_scan_start(rdev, wdev);
6750                 if (wdev->netdev)
6751                         dev_hold(wdev->netdev);
6752         } else {
6753  out_free:
6754                 rdev->scan_req = NULL;
6755                 kfree(request);
6756         }
6757
6758  unlock:
6759         return err;
6760 }
6761
6762 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6763 {
6764         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6765         struct wireless_dev *wdev = info->user_ptr[1];
6766
6767         if (!rdev->ops->abort_scan)
6768                 return -EOPNOTSUPP;
6769
6770         if (rdev->scan_msg)
6771                 return 0;
6772
6773         if (!rdev->scan_req)
6774                 return -ENOENT;
6775
6776         rdev_abort_scan(rdev, wdev);
6777         return 0;
6778 }
6779
6780 static int
6781 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6782                                struct cfg80211_sched_scan_request *request,
6783                                struct nlattr **attrs)
6784 {
6785         int tmp, err, i = 0;
6786         struct nlattr *attr;
6787
6788         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6789                 u32 interval;
6790
6791                 /*
6792                  * If scan plans are not specified,
6793                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6794                  * case one scan plan will be set with the specified scan
6795                  * interval and infinite number of iterations.
6796                  */
6797                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6798                         return -EINVAL;
6799
6800                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6801                 if (!interval)
6802                         return -EINVAL;
6803
6804                 request->scan_plans[0].interval =
6805                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6806                 if (!request->scan_plans[0].interval)
6807                         return -EINVAL;
6808
6809                 if (request->scan_plans[0].interval >
6810                     wiphy->max_sched_scan_plan_interval)
6811                         request->scan_plans[0].interval =
6812                                 wiphy->max_sched_scan_plan_interval;
6813
6814                 return 0;
6815         }
6816
6817         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6818                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6819
6820                 if (WARN_ON(i >= n_plans))
6821                         return -EINVAL;
6822
6823                 err = nla_parse_nested(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6824                                        attr, nl80211_plan_policy);
6825                 if (err)
6826                         return err;
6827
6828                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6829                         return -EINVAL;
6830
6831                 request->scan_plans[i].interval =
6832                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6833                 if (!request->scan_plans[i].interval ||
6834                     request->scan_plans[i].interval >
6835                     wiphy->max_sched_scan_plan_interval)
6836                         return -EINVAL;
6837
6838                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6839                         request->scan_plans[i].iterations =
6840                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6841                         if (!request->scan_plans[i].iterations ||
6842                             (request->scan_plans[i].iterations >
6843                              wiphy->max_sched_scan_plan_iterations))
6844                                 return -EINVAL;
6845                 } else if (i < n_plans - 1) {
6846                         /*
6847                          * All scan plans but the last one must specify
6848                          * a finite number of iterations
6849                          */
6850                         return -EINVAL;
6851                 }
6852
6853                 i++;
6854         }
6855
6856         /*
6857          * The last scan plan must not specify the number of
6858          * iterations, it is supposed to run infinitely
6859          */
6860         if (request->scan_plans[n_plans - 1].iterations)
6861                 return  -EINVAL;
6862
6863         return 0;
6864 }
6865
6866 static struct cfg80211_sched_scan_request *
6867 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6868                          struct nlattr **attrs)
6869 {
6870         struct cfg80211_sched_scan_request *request;
6871         struct nlattr *attr;
6872         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6873         enum nl80211_band band;
6874         size_t ie_len;
6875         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6876         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6877
6878         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6879                 return ERR_PTR(-EINVAL);
6880
6881         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6882                 n_channels = validate_scan_freqs(
6883                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6884                 if (!n_channels)
6885                         return ERR_PTR(-EINVAL);
6886         } else {
6887                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6888         }
6889
6890         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6891                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6892                                     tmp)
6893                         n_ssids++;
6894
6895         if (n_ssids > wiphy->max_sched_scan_ssids)
6896                 return ERR_PTR(-EINVAL);
6897
6898         /*
6899          * First, count the number of 'real' matchsets. Due to an issue with
6900          * the old implementation, matchsets containing only the RSSI attribute
6901          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6902          * RSSI for all matchsets, rather than their own matchset for reporting
6903          * all APs with a strong RSSI. This is needed to be compatible with
6904          * older userspace that treated a matchset with only the RSSI as the
6905          * global RSSI for all other matchsets - if there are other matchsets.
6906          */
6907         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6908                 nla_for_each_nested(attr,
6909                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6910                                     tmp) {
6911                         struct nlattr *rssi;
6912
6913                         err = nla_parse_nested(tb,
6914                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6915                                                attr, nl80211_match_policy);
6916                         if (err)
6917                                 return ERR_PTR(err);
6918                         /* add other standalone attributes here */
6919                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6920                                 n_match_sets++;
6921                                 continue;
6922                         }
6923                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6924                         if (rssi)
6925                                 default_match_rssi = nla_get_s32(rssi);
6926                 }
6927         }
6928
6929         /* However, if there's no other matchset, add the RSSI one */
6930         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6931                 n_match_sets = 1;
6932
6933         if (n_match_sets > wiphy->max_match_sets)
6934                 return ERR_PTR(-EINVAL);
6935
6936         if (attrs[NL80211_ATTR_IE])
6937                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6938         else
6939                 ie_len = 0;
6940
6941         if (ie_len > wiphy->max_sched_scan_ie_len)
6942                 return ERR_PTR(-EINVAL);
6943
6944         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6945                 /*
6946                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6947                  * each scan plan already specifies its own interval
6948                  */
6949                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6950                         return ERR_PTR(-EINVAL);
6951
6952                 nla_for_each_nested(attr,
6953                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6954                         n_plans++;
6955         } else {
6956                 /*
6957                  * The scan interval attribute is kept for backward
6958                  * compatibility. If no scan plans are specified and sched scan
6959                  * interval is specified, one scan plan will be set with this
6960                  * scan interval and infinite number of iterations.
6961                  */
6962                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6963                         return ERR_PTR(-EINVAL);
6964
6965                 n_plans = 1;
6966         }
6967
6968         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6969                 return ERR_PTR(-EINVAL);
6970
6971         request = kzalloc(sizeof(*request)
6972                         + sizeof(*request->ssids) * n_ssids
6973                         + sizeof(*request->match_sets) * n_match_sets
6974                         + sizeof(*request->scan_plans) * n_plans
6975                         + sizeof(*request->channels) * n_channels
6976                         + ie_len, GFP_KERNEL);
6977         if (!request)
6978                 return ERR_PTR(-ENOMEM);
6979
6980         if (n_ssids)
6981                 request->ssids = (void *)&request->channels[n_channels];
6982         request->n_ssids = n_ssids;
6983         if (ie_len) {
6984                 if (n_ssids)
6985                         request->ie = (void *)(request->ssids + n_ssids);
6986                 else
6987                         request->ie = (void *)(request->channels + n_channels);
6988         }
6989
6990         if (n_match_sets) {
6991                 if (request->ie)
6992                         request->match_sets = (void *)(request->ie + ie_len);
6993                 else if (n_ssids)
6994                         request->match_sets =
6995                                 (void *)(request->ssids + n_ssids);
6996                 else
6997                         request->match_sets =
6998                                 (void *)(request->channels + n_channels);
6999         }
7000         request->n_match_sets = n_match_sets;
7001
7002         if (n_match_sets)
7003                 request->scan_plans = (void *)(request->match_sets +
7004                                                n_match_sets);
7005         else if (request->ie)
7006                 request->scan_plans = (void *)(request->ie + ie_len);
7007         else if (n_ssids)
7008                 request->scan_plans = (void *)(request->ssids + n_ssids);
7009         else
7010                 request->scan_plans = (void *)(request->channels + n_channels);
7011
7012         request->n_scan_plans = n_plans;
7013
7014         i = 0;
7015         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
7016                 /* user specified, bail out if channel not found */
7017                 nla_for_each_nested(attr,
7018                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
7019                                     tmp) {
7020                         struct ieee80211_channel *chan;
7021
7022                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
7023
7024                         if (!chan) {
7025                                 err = -EINVAL;
7026                                 goto out_free;
7027                         }
7028
7029                         /* ignore disabled channels */
7030                         if (chan->flags & IEEE80211_CHAN_DISABLED)
7031                                 continue;
7032
7033                         request->channels[i] = chan;
7034                         i++;
7035                 }
7036         } else {
7037                 /* all channels */
7038                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
7039                         int j;
7040
7041                         if (!wiphy->bands[band])
7042                                 continue;
7043                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
7044                                 struct ieee80211_channel *chan;
7045
7046                                 chan = &wiphy->bands[band]->channels[j];
7047
7048                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
7049                                         continue;
7050
7051                                 request->channels[i] = chan;
7052                                 i++;
7053                         }
7054                 }
7055         }
7056
7057         if (!i) {
7058                 err = -EINVAL;
7059                 goto out_free;
7060         }
7061
7062         request->n_channels = i;
7063
7064         i = 0;
7065         if (n_ssids) {
7066                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
7067                                     tmp) {
7068                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
7069                                 err = -EINVAL;
7070                                 goto out_free;
7071                         }
7072                         request->ssids[i].ssid_len = nla_len(attr);
7073                         memcpy(request->ssids[i].ssid, nla_data(attr),
7074                                nla_len(attr));
7075                         i++;
7076                 }
7077         }
7078
7079         i = 0;
7080         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
7081                 nla_for_each_nested(attr,
7082                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
7083                                     tmp) {
7084                         struct nlattr *ssid, *rssi;
7085
7086                         err = nla_parse_nested(tb,
7087                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
7088                                                attr, nl80211_match_policy);
7089                         if (err)
7090                                 goto out_free;
7091                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
7092                         if (ssid) {
7093                                 if (WARN_ON(i >= n_match_sets)) {
7094                                         /* this indicates a programming error,
7095                                          * the loop above should have verified
7096                                          * things properly
7097                                          */
7098                                         err = -EINVAL;
7099                                         goto out_free;
7100                                 }
7101
7102                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
7103                                         err = -EINVAL;
7104                                         goto out_free;
7105                                 }
7106                                 memcpy(request->match_sets[i].ssid.ssid,
7107                                        nla_data(ssid), nla_len(ssid));
7108                                 request->match_sets[i].ssid.ssid_len =
7109                                         nla_len(ssid);
7110                                 /* special attribute - old implementation w/a */
7111                                 request->match_sets[i].rssi_thold =
7112                                         default_match_rssi;
7113                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7114                                 if (rssi)
7115                                         request->match_sets[i].rssi_thold =
7116                                                 nla_get_s32(rssi);
7117                         }
7118                         i++;
7119                 }
7120
7121                 /* there was no other matchset, so the RSSI one is alone */
7122                 if (i == 0 && n_match_sets)
7123                         request->match_sets[0].rssi_thold = default_match_rssi;
7124
7125                 request->min_rssi_thold = INT_MAX;
7126                 for (i = 0; i < n_match_sets; i++)
7127                         request->min_rssi_thold =
7128                                 min(request->match_sets[i].rssi_thold,
7129                                     request->min_rssi_thold);
7130         } else {
7131                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
7132         }
7133
7134         if (ie_len) {
7135                 request->ie_len = ie_len;
7136                 memcpy((void *)request->ie,
7137                        nla_data(attrs[NL80211_ATTR_IE]),
7138                        request->ie_len);
7139         }
7140
7141         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
7142                 request->flags = nla_get_u32(
7143                         attrs[NL80211_ATTR_SCAN_FLAGS]);
7144                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
7145                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
7146                         err = -EOPNOTSUPP;
7147                         goto out_free;
7148                 }
7149
7150                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
7151                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
7152
7153                         if (!wdev) /* must be net-detect */
7154                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
7155
7156                         if (!(wiphy->features & flg)) {
7157                                 err = -EOPNOTSUPP;
7158                                 goto out_free;
7159                         }
7160
7161                         if (wdev && wdev->current_bss) {
7162                                 err = -EOPNOTSUPP;
7163                                 goto out_free;
7164                         }
7165
7166                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
7167                                                        request->mac_addr_mask);
7168                         if (err)
7169                                 goto out_free;
7170                 }
7171         }
7172
7173         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
7174                 request->delay =
7175                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
7176
7177         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
7178         if (err)
7179                 goto out_free;
7180
7181         request->scan_start = jiffies;
7182
7183         return request;
7184
7185 out_free:
7186         kfree(request);
7187         return ERR_PTR(err);
7188 }
7189
7190 static int nl80211_start_sched_scan(struct sk_buff *skb,
7191                                     struct genl_info *info)
7192 {
7193         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7194         struct net_device *dev = info->user_ptr[1];
7195         struct wireless_dev *wdev = dev->ieee80211_ptr;
7196         struct cfg80211_sched_scan_request *sched_scan_req;
7197         int err;
7198
7199         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
7200             !rdev->ops->sched_scan_start)
7201                 return -EOPNOTSUPP;
7202
7203         if (rdev->sched_scan_req)
7204                 return -EINPROGRESS;
7205
7206         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
7207                                                   info->attrs);
7208
7209         err = PTR_ERR_OR_ZERO(sched_scan_req);
7210         if (err)
7211                 goto out_err;
7212
7213         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
7214         if (err)
7215                 goto out_free;
7216
7217         sched_scan_req->dev = dev;
7218         sched_scan_req->wiphy = &rdev->wiphy;
7219
7220         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
7221                 sched_scan_req->owner_nlportid = info->snd_portid;
7222
7223         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
7224
7225         nl80211_send_sched_scan(rdev, dev,
7226                                 NL80211_CMD_START_SCHED_SCAN);
7227         return 0;
7228
7229 out_free:
7230         kfree(sched_scan_req);
7231 out_err:
7232         return err;
7233 }
7234
7235 static int nl80211_stop_sched_scan(struct sk_buff *skb,
7236                                    struct genl_info *info)
7237 {
7238         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7239
7240         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
7241             !rdev->ops->sched_scan_stop)
7242                 return -EOPNOTSUPP;
7243
7244         return __cfg80211_stop_sched_scan(rdev, false);
7245 }
7246
7247 static int nl80211_start_radar_detection(struct sk_buff *skb,
7248                                          struct genl_info *info)
7249 {
7250         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7251         struct net_device *dev = info->user_ptr[1];
7252         struct wireless_dev *wdev = dev->ieee80211_ptr;
7253         struct cfg80211_chan_def chandef;
7254         enum nl80211_dfs_regions dfs_region;
7255         unsigned int cac_time_ms;
7256         int err;
7257
7258         dfs_region = reg_get_dfs_region(wdev->wiphy);
7259         if (dfs_region == NL80211_DFS_UNSET)
7260                 return -EINVAL;
7261
7262         err = nl80211_parse_chandef(rdev, info, &chandef);
7263         if (err)
7264                 return err;
7265
7266         if (netif_carrier_ok(dev))
7267                 return -EBUSY;
7268
7269         if (wdev->cac_started)
7270                 return -EBUSY;
7271
7272         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
7273                                             wdev->iftype);
7274         if (err < 0)
7275                 return err;
7276
7277         if (err == 0)
7278                 return -EINVAL;
7279
7280         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
7281                 return -EINVAL;
7282
7283         if (!rdev->ops->start_radar_detection)
7284                 return -EOPNOTSUPP;
7285
7286         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
7287         if (WARN_ON(!cac_time_ms))
7288                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
7289
7290         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
7291         if (!err) {
7292                 wdev->chandef = chandef;
7293                 wdev->cac_started = true;
7294                 wdev->cac_start_time = jiffies;
7295                 wdev->cac_time_ms = cac_time_ms;
7296         }
7297         return err;
7298 }
7299
7300 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
7301 {
7302         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7303         struct net_device *dev = info->user_ptr[1];
7304         struct wireless_dev *wdev = dev->ieee80211_ptr;
7305         struct cfg80211_csa_settings params;
7306         /* csa_attrs is defined static to avoid waste of stack size - this
7307          * function is called under RTNL lock, so this should not be a problem.
7308          */
7309         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
7310         int err;
7311         bool need_new_beacon = false;
7312         int len, i;
7313         u32 cs_count;
7314
7315         if (!rdev->ops->channel_switch ||
7316             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
7317                 return -EOPNOTSUPP;
7318
7319         switch (dev->ieee80211_ptr->iftype) {
7320         case NL80211_IFTYPE_AP:
7321         case NL80211_IFTYPE_P2P_GO:
7322                 need_new_beacon = true;
7323
7324                 /* useless if AP is not running */
7325                 if (!wdev->beacon_interval)
7326                         return -ENOTCONN;
7327                 break;
7328         case NL80211_IFTYPE_ADHOC:
7329                 if (!wdev->ssid_len)
7330                         return -ENOTCONN;
7331                 break;
7332         case NL80211_IFTYPE_MESH_POINT:
7333                 if (!wdev->mesh_id_len)
7334                         return -ENOTCONN;
7335                 break;
7336         default:
7337                 return -EOPNOTSUPP;
7338         }
7339
7340         memset(&params, 0, sizeof(params));
7341
7342         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7343             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
7344                 return -EINVAL;
7345
7346         /* only important for AP, IBSS and mesh create IEs internally */
7347         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
7348                 return -EINVAL;
7349
7350         /* Even though the attribute is u32, the specification says
7351          * u8, so let's make sure we don't overflow.
7352          */
7353         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
7354         if (cs_count > 255)
7355                 return -EINVAL;
7356
7357         params.count = cs_count;
7358
7359         if (!need_new_beacon)
7360                 goto skip_beacons;
7361
7362         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
7363         if (err)
7364                 return err;
7365
7366         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
7367                                info->attrs[NL80211_ATTR_CSA_IES],
7368                                nl80211_policy);
7369         if (err)
7370                 return err;
7371
7372         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
7373         if (err)
7374                 return err;
7375
7376         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
7377                 return -EINVAL;
7378
7379         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7380         if (!len || (len % sizeof(u16)))
7381                 return -EINVAL;
7382
7383         params.n_counter_offsets_beacon = len / sizeof(u16);
7384         if (rdev->wiphy.max_num_csa_counters &&
7385             (params.n_counter_offsets_beacon >
7386              rdev->wiphy.max_num_csa_counters))
7387                 return -EINVAL;
7388
7389         params.counter_offsets_beacon =
7390                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7391
7392         /* sanity checks - counters should fit and be the same */
7393         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
7394                 u16 offset = params.counter_offsets_beacon[i];
7395
7396                 if (offset >= params.beacon_csa.tail_len)
7397                         return -EINVAL;
7398
7399                 if (params.beacon_csa.tail[offset] != params.count)
7400                         return -EINVAL;
7401         }
7402
7403         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
7404                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7405                 if (!len || (len % sizeof(u16)))
7406                         return -EINVAL;
7407
7408                 params.n_counter_offsets_presp = len / sizeof(u16);
7409                 if (rdev->wiphy.max_num_csa_counters &&
7410                     (params.n_counter_offsets_presp >
7411                      rdev->wiphy.max_num_csa_counters))
7412                         return -EINVAL;
7413
7414                 params.counter_offsets_presp =
7415                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7416
7417                 /* sanity checks - counters should fit and be the same */
7418                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
7419                         u16 offset = params.counter_offsets_presp[i];
7420
7421                         if (offset >= params.beacon_csa.probe_resp_len)
7422                                 return -EINVAL;
7423
7424                         if (params.beacon_csa.probe_resp[offset] !=
7425                             params.count)
7426                                 return -EINVAL;
7427                 }
7428         }
7429
7430 skip_beacons:
7431         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7432         if (err)
7433                 return err;
7434
7435         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7436                                            wdev->iftype))
7437                 return -EINVAL;
7438
7439         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7440                                             &params.chandef,
7441                                             wdev->iftype);
7442         if (err < 0)
7443                 return err;
7444
7445         if (err > 0)
7446                 params.radar_required = true;
7447
7448         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7449                 params.block_tx = true;
7450
7451         wdev_lock(wdev);
7452         err = rdev_channel_switch(rdev, dev, &params);
7453         wdev_unlock(wdev);
7454
7455         return err;
7456 }
7457
7458 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7459                             u32 seq, int flags,
7460                             struct cfg80211_registered_device *rdev,
7461                             struct wireless_dev *wdev,
7462                             struct cfg80211_internal_bss *intbss)
7463 {
7464         struct cfg80211_bss *res = &intbss->pub;
7465         const struct cfg80211_bss_ies *ies;
7466         void *hdr;
7467         struct nlattr *bss;
7468
7469         ASSERT_WDEV_LOCK(wdev);
7470
7471         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7472                              NL80211_CMD_NEW_SCAN_RESULTS);
7473         if (!hdr)
7474                 return -1;
7475
7476         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7477
7478         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7479                 goto nla_put_failure;
7480         if (wdev->netdev &&
7481             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7482                 goto nla_put_failure;
7483         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7484                               NL80211_ATTR_PAD))
7485                 goto nla_put_failure;
7486
7487         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7488         if (!bss)
7489                 goto nla_put_failure;
7490         if ((!is_zero_ether_addr(res->bssid) &&
7491              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7492                 goto nla_put_failure;
7493
7494         rcu_read_lock();
7495         /* indicate whether we have probe response data or not */
7496         if (rcu_access_pointer(res->proberesp_ies) &&
7497             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7498                 goto fail_unlock_rcu;
7499
7500         /* this pointer prefers to be pointed to probe response data
7501          * but is always valid
7502          */
7503         ies = rcu_dereference(res->ies);
7504         if (ies) {
7505                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7506                                       NL80211_BSS_PAD))
7507                         goto fail_unlock_rcu;
7508                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7509                                         ies->len, ies->data))
7510                         goto fail_unlock_rcu;
7511         }
7512
7513         /* and this pointer is always (unless driver didn't know) beacon data */
7514         ies = rcu_dereference(res->beacon_ies);
7515         if (ies && ies->from_beacon) {
7516                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7517                                       NL80211_BSS_PAD))
7518                         goto fail_unlock_rcu;
7519                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7520                                         ies->len, ies->data))
7521                         goto fail_unlock_rcu;
7522         }
7523         rcu_read_unlock();
7524
7525         if (res->beacon_interval &&
7526             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7527                 goto nla_put_failure;
7528         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7529             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7530             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7531             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7532                         jiffies_to_msecs(jiffies - intbss->ts)))
7533                 goto nla_put_failure;
7534
7535         if (intbss->parent_tsf &&
7536             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7537                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7538              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7539                      intbss->parent_bssid)))
7540                 goto nla_put_failure;
7541
7542         if (intbss->ts_boottime &&
7543             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7544                               intbss->ts_boottime, NL80211_BSS_PAD))
7545                 goto nla_put_failure;
7546
7547         switch (rdev->wiphy.signal_type) {
7548         case CFG80211_SIGNAL_TYPE_MBM:
7549                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7550                         goto nla_put_failure;
7551                 break;
7552         case CFG80211_SIGNAL_TYPE_UNSPEC:
7553                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7554                         goto nla_put_failure;
7555                 break;
7556         default:
7557                 break;
7558         }
7559
7560         switch (wdev->iftype) {
7561         case NL80211_IFTYPE_P2P_CLIENT:
7562         case NL80211_IFTYPE_STATION:
7563                 if (intbss == wdev->current_bss &&
7564                     nla_put_u32(msg, NL80211_BSS_STATUS,
7565                                 NL80211_BSS_STATUS_ASSOCIATED))
7566                         goto nla_put_failure;
7567                 break;
7568         case NL80211_IFTYPE_ADHOC:
7569                 if (intbss == wdev->current_bss &&
7570                     nla_put_u32(msg, NL80211_BSS_STATUS,
7571                                 NL80211_BSS_STATUS_IBSS_JOINED))
7572                         goto nla_put_failure;
7573                 break;
7574         default:
7575                 break;
7576         }
7577
7578         nla_nest_end(msg, bss);
7579
7580         genlmsg_end(msg, hdr);
7581         return 0;
7582
7583  fail_unlock_rcu:
7584         rcu_read_unlock();
7585  nla_put_failure:
7586         genlmsg_cancel(msg, hdr);
7587         return -EMSGSIZE;
7588 }
7589
7590 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7591 {
7592         struct cfg80211_registered_device *rdev;
7593         struct cfg80211_internal_bss *scan;
7594         struct wireless_dev *wdev;
7595         int start = cb->args[2], idx = 0;
7596         int err;
7597
7598         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7599         if (err)
7600                 return err;
7601
7602         wdev_lock(wdev);
7603         spin_lock_bh(&rdev->bss_lock);
7604         cfg80211_bss_expire(rdev);
7605
7606         cb->seq = rdev->bss_generation;
7607
7608         list_for_each_entry(scan, &rdev->bss_list, list) {
7609                 if (++idx <= start)
7610                         continue;
7611                 if (nl80211_send_bss(skb, cb,
7612                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7613                                 rdev, wdev, scan) < 0) {
7614                         idx--;
7615                         break;
7616                 }
7617         }
7618
7619         spin_unlock_bh(&rdev->bss_lock);
7620         wdev_unlock(wdev);
7621
7622         cb->args[2] = idx;
7623         nl80211_finish_wdev_dump(rdev);
7624
7625         return skb->len;
7626 }
7627
7628 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7629                                int flags, struct net_device *dev,
7630                                bool allow_radio_stats,
7631                                struct survey_info *survey)
7632 {
7633         void *hdr;
7634         struct nlattr *infoattr;
7635
7636         /* skip radio stats if userspace didn't request them */
7637         if (!survey->channel && !allow_radio_stats)
7638                 return 0;
7639
7640         hdr = nl80211hdr_put(msg, portid, seq, flags,
7641                              NL80211_CMD_NEW_SURVEY_RESULTS);
7642         if (!hdr)
7643                 return -ENOMEM;
7644
7645         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7646                 goto nla_put_failure;
7647
7648         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7649         if (!infoattr)
7650                 goto nla_put_failure;
7651
7652         if (survey->channel &&
7653             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7654                         survey->channel->center_freq))
7655                 goto nla_put_failure;
7656
7657         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7658             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7659                 goto nla_put_failure;
7660         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7661             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7662                 goto nla_put_failure;
7663         if ((survey->filled & SURVEY_INFO_TIME) &&
7664             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7665                         survey->time, NL80211_SURVEY_INFO_PAD))
7666                 goto nla_put_failure;
7667         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7668             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7669                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7670                 goto nla_put_failure;
7671         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7672             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7673                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7674                 goto nla_put_failure;
7675         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7676             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7677                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7678                 goto nla_put_failure;
7679         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7680             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7681                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7682                 goto nla_put_failure;
7683         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7684             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7685                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7686                 goto nla_put_failure;
7687
7688         nla_nest_end(msg, infoattr);
7689
7690         genlmsg_end(msg, hdr);
7691         return 0;
7692
7693  nla_put_failure:
7694         genlmsg_cancel(msg, hdr);
7695         return -EMSGSIZE;
7696 }
7697
7698 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7699 {
7700         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
7701         struct survey_info survey;
7702         struct cfg80211_registered_device *rdev;
7703         struct wireless_dev *wdev;
7704         int survey_idx = cb->args[2];
7705         int res;
7706         bool radio_stats;
7707
7708         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7709         if (res)
7710                 return res;
7711
7712         /* prepare_wdev_dump parsed the attributes */
7713         radio_stats = attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7714
7715         if (!wdev->netdev) {
7716                 res = -EINVAL;
7717                 goto out_err;
7718         }
7719
7720         if (!rdev->ops->dump_survey) {
7721                 res = -EOPNOTSUPP;
7722                 goto out_err;
7723         }
7724
7725         while (1) {
7726                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7727                 if (res == -ENOENT)
7728                         break;
7729                 if (res)
7730                         goto out_err;
7731
7732                 /* don't send disabled channels, but do send non-channel data */
7733                 if (survey.channel &&
7734                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7735                         survey_idx++;
7736                         continue;
7737                 }
7738
7739                 if (nl80211_send_survey(skb,
7740                                 NETLINK_CB(cb->skb).portid,
7741                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7742                                 wdev->netdev, radio_stats, &survey) < 0)
7743                         goto out;
7744                 survey_idx++;
7745         }
7746
7747  out:
7748         cb->args[2] = survey_idx;
7749         res = skb->len;
7750  out_err:
7751         nl80211_finish_wdev_dump(rdev);
7752         return res;
7753 }
7754
7755 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7756 {
7757         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7758                                   NL80211_WPA_VERSION_2));
7759 }
7760
7761 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7762 {
7763         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7764         struct net_device *dev = info->user_ptr[1];
7765         struct ieee80211_channel *chan;
7766         const u8 *bssid, *ssid, *ie = NULL, *auth_data = NULL;
7767         int err, ssid_len, ie_len = 0, auth_data_len = 0;
7768         enum nl80211_auth_type auth_type;
7769         struct key_parse key;
7770         bool local_state_change;
7771
7772         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7773                 return -EINVAL;
7774
7775         if (!info->attrs[NL80211_ATTR_MAC])
7776                 return -EINVAL;
7777
7778         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7779                 return -EINVAL;
7780
7781         if (!info->attrs[NL80211_ATTR_SSID])
7782                 return -EINVAL;
7783
7784         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7785                 return -EINVAL;
7786
7787         err = nl80211_parse_key(info, &key);
7788         if (err)
7789                 return err;
7790
7791         if (key.idx >= 0) {
7792                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7793                         return -EINVAL;
7794                 if (!key.p.key || !key.p.key_len)
7795                         return -EINVAL;
7796                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7797                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7798                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7799                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7800                         return -EINVAL;
7801                 if (key.idx > 3)
7802                         return -EINVAL;
7803         } else {
7804                 key.p.key_len = 0;
7805                 key.p.key = NULL;
7806         }
7807
7808         if (key.idx >= 0) {
7809                 int i;
7810                 bool ok = false;
7811
7812                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7813                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7814                                 ok = true;
7815                                 break;
7816                         }
7817                 }
7818                 if (!ok)
7819                         return -EINVAL;
7820         }
7821
7822         if (!rdev->ops->auth)
7823                 return -EOPNOTSUPP;
7824
7825         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7826             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7827                 return -EOPNOTSUPP;
7828
7829         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7830         chan = nl80211_get_valid_chan(&rdev->wiphy,
7831                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7832         if (!chan)
7833                 return -EINVAL;
7834
7835         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7836         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7837
7838         if (info->attrs[NL80211_ATTR_IE]) {
7839                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7840                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7841         }
7842
7843         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7844         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7845                 return -EINVAL;
7846
7847         if ((auth_type == NL80211_AUTHTYPE_SAE ||
7848              auth_type == NL80211_AUTHTYPE_FILS_SK ||
7849              auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
7850              auth_type == NL80211_AUTHTYPE_FILS_PK) &&
7851             !info->attrs[NL80211_ATTR_AUTH_DATA])
7852                 return -EINVAL;
7853
7854         if (info->attrs[NL80211_ATTR_AUTH_DATA]) {
7855                 if (auth_type != NL80211_AUTHTYPE_SAE &&
7856                     auth_type != NL80211_AUTHTYPE_FILS_SK &&
7857                     auth_type != NL80211_AUTHTYPE_FILS_SK_PFS &&
7858                     auth_type != NL80211_AUTHTYPE_FILS_PK)
7859                         return -EINVAL;
7860                 auth_data = nla_data(info->attrs[NL80211_ATTR_AUTH_DATA]);
7861                 auth_data_len = nla_len(info->attrs[NL80211_ATTR_AUTH_DATA]);
7862                 /* need to include at least Auth Transaction and Status Code */
7863                 if (auth_data_len < 4)
7864                         return -EINVAL;
7865         }
7866
7867         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7868
7869         /*
7870          * Since we no longer track auth state, ignore
7871          * requests to only change local state.
7872          */
7873         if (local_state_change)
7874                 return 0;
7875
7876         wdev_lock(dev->ieee80211_ptr);
7877         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7878                                  ssid, ssid_len, ie, ie_len,
7879                                  key.p.key, key.p.key_len, key.idx,
7880                                  auth_data, auth_data_len);
7881         wdev_unlock(dev->ieee80211_ptr);
7882         return err;
7883 }
7884
7885 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7886                                    struct genl_info *info,
7887                                    struct cfg80211_crypto_settings *settings,
7888                                    int cipher_limit)
7889 {
7890         memset(settings, 0, sizeof(*settings));
7891
7892         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7893
7894         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7895                 u16 proto;
7896
7897                 proto = nla_get_u16(
7898                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7899                 settings->control_port_ethertype = cpu_to_be16(proto);
7900                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7901                     proto != ETH_P_PAE)
7902                         return -EINVAL;
7903                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7904                         settings->control_port_no_encrypt = true;
7905         } else
7906                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7907
7908         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7909                 void *data;
7910                 int len, i;
7911
7912                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7913                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7914                 settings->n_ciphers_pairwise = len / sizeof(u32);
7915
7916                 if (len % sizeof(u32))
7917                         return -EINVAL;
7918
7919                 if (settings->n_ciphers_pairwise > cipher_limit)
7920                         return -EINVAL;
7921
7922                 memcpy(settings->ciphers_pairwise, data, len);
7923
7924                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7925                         if (!cfg80211_supported_cipher_suite(
7926                                         &rdev->wiphy,
7927                                         settings->ciphers_pairwise[i]))
7928                                 return -EINVAL;
7929         }
7930
7931         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7932                 settings->cipher_group =
7933                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7934                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7935                                                      settings->cipher_group))
7936                         return -EINVAL;
7937         }
7938
7939         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7940                 settings->wpa_versions =
7941                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7942                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7943                         return -EINVAL;
7944         }
7945
7946         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7947                 void *data;
7948                 int len;
7949
7950                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7951                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7952                 settings->n_akm_suites = len / sizeof(u32);
7953
7954                 if (len % sizeof(u32))
7955                         return -EINVAL;
7956
7957                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7958                         return -EINVAL;
7959
7960                 memcpy(settings->akm_suites, data, len);
7961         }
7962
7963         return 0;
7964 }
7965
7966 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7967 {
7968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7969         struct net_device *dev = info->user_ptr[1];
7970         struct ieee80211_channel *chan;
7971         struct cfg80211_assoc_request req = {};
7972         const u8 *bssid, *ssid;
7973         int err, ssid_len = 0;
7974
7975         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7976                 return -EINVAL;
7977
7978         if (!info->attrs[NL80211_ATTR_MAC] ||
7979             !info->attrs[NL80211_ATTR_SSID] ||
7980             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7981                 return -EINVAL;
7982
7983         if (!rdev->ops->assoc)
7984                 return -EOPNOTSUPP;
7985
7986         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7987             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7988                 return -EOPNOTSUPP;
7989
7990         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7991
7992         chan = nl80211_get_valid_chan(&rdev->wiphy,
7993                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7994         if (!chan)
7995                 return -EINVAL;
7996
7997         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7998         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7999
8000         if (info->attrs[NL80211_ATTR_IE]) {
8001                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8002                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8003         }
8004
8005         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8006                 enum nl80211_mfp mfp =
8007                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8008                 if (mfp == NL80211_MFP_REQUIRED)
8009                         req.use_mfp = true;
8010                 else if (mfp != NL80211_MFP_NO)
8011                         return -EINVAL;
8012         }
8013
8014         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8015                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8016
8017         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8018                 req.flags |= ASSOC_REQ_DISABLE_HT;
8019
8020         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8021                 memcpy(&req.ht_capa_mask,
8022                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8023                        sizeof(req.ht_capa_mask));
8024
8025         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8026                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8027                         return -EINVAL;
8028                 memcpy(&req.ht_capa,
8029                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8030                        sizeof(req.ht_capa));
8031         }
8032
8033         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8034                 req.flags |= ASSOC_REQ_DISABLE_VHT;
8035
8036         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8037                 memcpy(&req.vht_capa_mask,
8038                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8039                        sizeof(req.vht_capa_mask));
8040
8041         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8042                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8043                         return -EINVAL;
8044                 memcpy(&req.vht_capa,
8045                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8046                        sizeof(req.vht_capa));
8047         }
8048
8049         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8050                 if (!((rdev->wiphy.features &
8051                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8052                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8053                     !wiphy_ext_feature_isset(&rdev->wiphy,
8054                                              NL80211_EXT_FEATURE_RRM))
8055                         return -EINVAL;
8056                 req.flags |= ASSOC_REQ_USE_RRM;
8057         }
8058
8059         if (info->attrs[NL80211_ATTR_FILS_KEK]) {
8060                 req.fils_kek = nla_data(info->attrs[NL80211_ATTR_FILS_KEK]);
8061                 req.fils_kek_len = nla_len(info->attrs[NL80211_ATTR_FILS_KEK]);
8062                 if (!info->attrs[NL80211_ATTR_FILS_NONCES])
8063                         return -EINVAL;
8064                 req.fils_nonces =
8065                         nla_data(info->attrs[NL80211_ATTR_FILS_NONCES]);
8066         }
8067
8068         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
8069         if (!err) {
8070                 wdev_lock(dev->ieee80211_ptr);
8071                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
8072                                           ssid, ssid_len, &req);
8073                 wdev_unlock(dev->ieee80211_ptr);
8074         }
8075
8076         return err;
8077 }
8078
8079 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
8080 {
8081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8082         struct net_device *dev = info->user_ptr[1];
8083         const u8 *ie = NULL, *bssid;
8084         int ie_len = 0, err;
8085         u16 reason_code;
8086         bool local_state_change;
8087
8088         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8089                 return -EINVAL;
8090
8091         if (!info->attrs[NL80211_ATTR_MAC])
8092                 return -EINVAL;
8093
8094         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8095                 return -EINVAL;
8096
8097         if (!rdev->ops->deauth)
8098                 return -EOPNOTSUPP;
8099
8100         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8101             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8102                 return -EOPNOTSUPP;
8103
8104         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8105
8106         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8107         if (reason_code == 0) {
8108                 /* Reason Code 0 is reserved */
8109                 return -EINVAL;
8110         }
8111
8112         if (info->attrs[NL80211_ATTR_IE]) {
8113                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8114                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8115         }
8116
8117         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8118
8119         wdev_lock(dev->ieee80211_ptr);
8120         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
8121                                    local_state_change);
8122         wdev_unlock(dev->ieee80211_ptr);
8123         return err;
8124 }
8125
8126 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
8127 {
8128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8129         struct net_device *dev = info->user_ptr[1];
8130         const u8 *ie = NULL, *bssid;
8131         int ie_len = 0, err;
8132         u16 reason_code;
8133         bool local_state_change;
8134
8135         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8136                 return -EINVAL;
8137
8138         if (!info->attrs[NL80211_ATTR_MAC])
8139                 return -EINVAL;
8140
8141         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8142                 return -EINVAL;
8143
8144         if (!rdev->ops->disassoc)
8145                 return -EOPNOTSUPP;
8146
8147         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8148             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8149                 return -EOPNOTSUPP;
8150
8151         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8152
8153         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8154         if (reason_code == 0) {
8155                 /* Reason Code 0 is reserved */
8156                 return -EINVAL;
8157         }
8158
8159         if (info->attrs[NL80211_ATTR_IE]) {
8160                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8161                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8162         }
8163
8164         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8165
8166         wdev_lock(dev->ieee80211_ptr);
8167         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
8168                                      local_state_change);
8169         wdev_unlock(dev->ieee80211_ptr);
8170         return err;
8171 }
8172
8173 static bool
8174 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
8175                          int mcast_rate[NUM_NL80211_BANDS],
8176                          int rateval)
8177 {
8178         struct wiphy *wiphy = &rdev->wiphy;
8179         bool found = false;
8180         int band, i;
8181
8182         for (band = 0; band < NUM_NL80211_BANDS; band++) {
8183                 struct ieee80211_supported_band *sband;
8184
8185                 sband = wiphy->bands[band];
8186                 if (!sband)
8187                         continue;
8188
8189                 for (i = 0; i < sband->n_bitrates; i++) {
8190                         if (sband->bitrates[i].bitrate == rateval) {
8191                                 mcast_rate[band] = i + 1;
8192                                 found = true;
8193                                 break;
8194                         }
8195                 }
8196         }
8197
8198         return found;
8199 }
8200
8201 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
8202 {
8203         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8204         struct net_device *dev = info->user_ptr[1];
8205         struct cfg80211_ibss_params ibss;
8206         struct wiphy *wiphy;
8207         struct cfg80211_cached_keys *connkeys = NULL;
8208         int err;
8209
8210         memset(&ibss, 0, sizeof(ibss));
8211
8212         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8213                 return -EINVAL;
8214
8215         if (!info->attrs[NL80211_ATTR_SSID] ||
8216             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8217                 return -EINVAL;
8218
8219         ibss.beacon_interval = 100;
8220
8221         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
8222                 ibss.beacon_interval =
8223                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8224
8225         err = cfg80211_validate_beacon_int(rdev, NL80211_IFTYPE_ADHOC,
8226                                            ibss.beacon_interval);
8227         if (err)
8228                 return err;
8229
8230         if (!rdev->ops->join_ibss)
8231                 return -EOPNOTSUPP;
8232
8233         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8234                 return -EOPNOTSUPP;
8235
8236         wiphy = &rdev->wiphy;
8237
8238         if (info->attrs[NL80211_ATTR_MAC]) {
8239                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8240
8241                 if (!is_valid_ether_addr(ibss.bssid))
8242                         return -EINVAL;
8243         }
8244         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8245         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8246
8247         if (info->attrs[NL80211_ATTR_IE]) {
8248                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8249                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8250         }
8251
8252         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
8253         if (err)
8254                 return err;
8255
8256         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
8257                                      NL80211_IFTYPE_ADHOC))
8258                 return -EINVAL;
8259
8260         switch (ibss.chandef.width) {
8261         case NL80211_CHAN_WIDTH_5:
8262         case NL80211_CHAN_WIDTH_10:
8263         case NL80211_CHAN_WIDTH_20_NOHT:
8264                 break;
8265         case NL80211_CHAN_WIDTH_20:
8266         case NL80211_CHAN_WIDTH_40:
8267                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8268                         return -EINVAL;
8269                 break;
8270         case NL80211_CHAN_WIDTH_80:
8271         case NL80211_CHAN_WIDTH_80P80:
8272         case NL80211_CHAN_WIDTH_160:
8273                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8274                         return -EINVAL;
8275                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
8276                                              NL80211_EXT_FEATURE_VHT_IBSS))
8277                         return -EINVAL;
8278                 break;
8279         default:
8280                 return -EINVAL;
8281         }
8282
8283         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
8284         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
8285
8286         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8287                 u8 *rates =
8288                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8289                 int n_rates =
8290                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8291                 struct ieee80211_supported_band *sband =
8292                         wiphy->bands[ibss.chandef.chan->band];
8293
8294                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8295                                              &ibss.basic_rates);
8296                 if (err)
8297                         return err;
8298         }
8299
8300         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8301                 memcpy(&ibss.ht_capa_mask,
8302                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8303                        sizeof(ibss.ht_capa_mask));
8304
8305         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8306                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8307                         return -EINVAL;
8308                 memcpy(&ibss.ht_capa,
8309                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8310                        sizeof(ibss.ht_capa));
8311         }
8312
8313         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8314             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
8315                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8316                 return -EINVAL;
8317
8318         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8319                 bool no_ht = false;
8320
8321                 connkeys = nl80211_parse_connkeys(rdev,
8322                                           info->attrs[NL80211_ATTR_KEYS],
8323                                           &no_ht);
8324                 if (IS_ERR(connkeys))
8325                         return PTR_ERR(connkeys);
8326
8327                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
8328                     no_ht) {
8329                         kzfree(connkeys);
8330                         return -EINVAL;
8331                 }
8332         }
8333
8334         ibss.control_port =
8335                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
8336
8337         ibss.userspace_handles_dfs =
8338                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
8339
8340         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
8341         if (err)
8342                 kzfree(connkeys);
8343         return err;
8344 }
8345
8346 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
8347 {
8348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8349         struct net_device *dev = info->user_ptr[1];
8350
8351         if (!rdev->ops->leave_ibss)
8352                 return -EOPNOTSUPP;
8353
8354         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8355                 return -EOPNOTSUPP;
8356
8357         return cfg80211_leave_ibss(rdev, dev, false);
8358 }
8359
8360 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
8361 {
8362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8363         struct net_device *dev = info->user_ptr[1];
8364         int mcast_rate[NUM_NL80211_BANDS];
8365         u32 nla_rate;
8366         int err;
8367
8368         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
8369             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
8370             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
8371                 return -EOPNOTSUPP;
8372
8373         if (!rdev->ops->set_mcast_rate)
8374                 return -EOPNOTSUPP;
8375
8376         memset(mcast_rate, 0, sizeof(mcast_rate));
8377
8378         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
8379                 return -EINVAL;
8380
8381         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
8382         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
8383                 return -EINVAL;
8384
8385         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
8386
8387         return err;
8388 }
8389
8390 static struct sk_buff *
8391 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
8392                             struct wireless_dev *wdev, int approxlen,
8393                             u32 portid, u32 seq, enum nl80211_commands cmd,
8394                             enum nl80211_attrs attr,
8395                             const struct nl80211_vendor_cmd_info *info,
8396                             gfp_t gfp)
8397 {
8398         struct sk_buff *skb;
8399         void *hdr;
8400         struct nlattr *data;
8401
8402         skb = nlmsg_new(approxlen + 100, gfp);
8403         if (!skb)
8404                 return NULL;
8405
8406         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
8407         if (!hdr) {
8408                 kfree_skb(skb);
8409                 return NULL;
8410         }
8411
8412         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
8413                 goto nla_put_failure;
8414
8415         if (info) {
8416                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
8417                                 info->vendor_id))
8418                         goto nla_put_failure;
8419                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
8420                                 info->subcmd))
8421                         goto nla_put_failure;
8422         }
8423
8424         if (wdev) {
8425                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
8426                                       wdev_id(wdev), NL80211_ATTR_PAD))
8427                         goto nla_put_failure;
8428                 if (wdev->netdev &&
8429                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
8430                                 wdev->netdev->ifindex))
8431                         goto nla_put_failure;
8432         }
8433
8434         data = nla_nest_start(skb, attr);
8435         if (!data)
8436                 goto nla_put_failure;
8437
8438         ((void **)skb->cb)[0] = rdev;
8439         ((void **)skb->cb)[1] = hdr;
8440         ((void **)skb->cb)[2] = data;
8441
8442         return skb;
8443
8444  nla_put_failure:
8445         kfree_skb(skb);
8446         return NULL;
8447 }
8448
8449 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8450                                            struct wireless_dev *wdev,
8451                                            enum nl80211_commands cmd,
8452                                            enum nl80211_attrs attr,
8453                                            int vendor_event_idx,
8454                                            int approxlen, gfp_t gfp)
8455 {
8456         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8457         const struct nl80211_vendor_cmd_info *info;
8458
8459         switch (cmd) {
8460         case NL80211_CMD_TESTMODE:
8461                 if (WARN_ON(vendor_event_idx != -1))
8462                         return NULL;
8463                 info = NULL;
8464                 break;
8465         case NL80211_CMD_VENDOR:
8466                 if (WARN_ON(vendor_event_idx < 0 ||
8467                             vendor_event_idx >= wiphy->n_vendor_events))
8468                         return NULL;
8469                 info = &wiphy->vendor_events[vendor_event_idx];
8470                 break;
8471         default:
8472                 WARN_ON(1);
8473                 return NULL;
8474         }
8475
8476         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8477                                            cmd, attr, info, gfp);
8478 }
8479 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8480
8481 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8482 {
8483         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8484         void *hdr = ((void **)skb->cb)[1];
8485         struct nlattr *data = ((void **)skb->cb)[2];
8486         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8487
8488         /* clear CB data for netlink core to own from now on */
8489         memset(skb->cb, 0, sizeof(skb->cb));
8490
8491         nla_nest_end(skb, data);
8492         genlmsg_end(skb, hdr);
8493
8494         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8495                 mcgrp = NL80211_MCGRP_VENDOR;
8496
8497         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8498                                 mcgrp, gfp);
8499 }
8500 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8501
8502 #ifdef CONFIG_NL80211_TESTMODE
8503 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8504 {
8505         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8506         struct wireless_dev *wdev =
8507                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8508         int err;
8509
8510         if (!rdev->ops->testmode_cmd)
8511                 return -EOPNOTSUPP;
8512
8513         if (IS_ERR(wdev)) {
8514                 err = PTR_ERR(wdev);
8515                 if (err != -EINVAL)
8516                         return err;
8517                 wdev = NULL;
8518         } else if (wdev->wiphy != &rdev->wiphy) {
8519                 return -EINVAL;
8520         }
8521
8522         if (!info->attrs[NL80211_ATTR_TESTDATA])
8523                 return -EINVAL;
8524
8525         rdev->cur_cmd_info = info;
8526         err = rdev_testmode_cmd(rdev, wdev,
8527                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8528                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8529         rdev->cur_cmd_info = NULL;
8530
8531         return err;
8532 }
8533
8534 static int nl80211_testmode_dump(struct sk_buff *skb,
8535                                  struct netlink_callback *cb)
8536 {
8537         struct cfg80211_registered_device *rdev;
8538         int err;
8539         long phy_idx;
8540         void *data = NULL;
8541         int data_len = 0;
8542
8543         rtnl_lock();
8544
8545         if (cb->args[0]) {
8546                 /*
8547                  * 0 is a valid index, but not valid for args[0],
8548                  * so we need to offset by 1.
8549                  */
8550                 phy_idx = cb->args[0] - 1;
8551         } else {
8552                 struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
8553
8554                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8555                                   attrbuf, nl80211_fam.maxattr, nl80211_policy);
8556                 if (err)
8557                         goto out_err;
8558
8559                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
8560                 if (IS_ERR(rdev)) {
8561                         err = PTR_ERR(rdev);
8562                         goto out_err;
8563                 }
8564                 phy_idx = rdev->wiphy_idx;
8565                 rdev = NULL;
8566
8567                 if (attrbuf[NL80211_ATTR_TESTDATA])
8568                         cb->args[1] = (long)attrbuf[NL80211_ATTR_TESTDATA];
8569         }
8570
8571         if (cb->args[1]) {
8572                 data = nla_data((void *)cb->args[1]);
8573                 data_len = nla_len((void *)cb->args[1]);
8574         }
8575
8576         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8577         if (!rdev) {
8578                 err = -ENOENT;
8579                 goto out_err;
8580         }
8581
8582         if (!rdev->ops->testmode_dump) {
8583                 err = -EOPNOTSUPP;
8584                 goto out_err;
8585         }
8586
8587         while (1) {
8588                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8589                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8590                                            NL80211_CMD_TESTMODE);
8591                 struct nlattr *tmdata;
8592
8593                 if (!hdr)
8594                         break;
8595
8596                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8597                         genlmsg_cancel(skb, hdr);
8598                         break;
8599                 }
8600
8601                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8602                 if (!tmdata) {
8603                         genlmsg_cancel(skb, hdr);
8604                         break;
8605                 }
8606                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8607                 nla_nest_end(skb, tmdata);
8608
8609                 if (err == -ENOBUFS || err == -ENOENT) {
8610                         genlmsg_cancel(skb, hdr);
8611                         break;
8612                 } else if (err) {
8613                         genlmsg_cancel(skb, hdr);
8614                         goto out_err;
8615                 }
8616
8617                 genlmsg_end(skb, hdr);
8618         }
8619
8620         err = skb->len;
8621         /* see above */
8622         cb->args[0] = phy_idx + 1;
8623  out_err:
8624         rtnl_unlock();
8625         return err;
8626 }
8627 #endif
8628
8629 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8630 {
8631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8632         struct net_device *dev = info->user_ptr[1];
8633         struct cfg80211_connect_params connect;
8634         struct wiphy *wiphy;
8635         struct cfg80211_cached_keys *connkeys = NULL;
8636         int err;
8637
8638         memset(&connect, 0, sizeof(connect));
8639
8640         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8641                 return -EINVAL;
8642
8643         if (!info->attrs[NL80211_ATTR_SSID] ||
8644             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8645                 return -EINVAL;
8646
8647         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8648                 connect.auth_type =
8649                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8650                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8651                                              NL80211_CMD_CONNECT))
8652                         return -EINVAL;
8653         } else
8654                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8655
8656         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8657
8658         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8659                                       NL80211_MAX_NR_CIPHER_SUITES);
8660         if (err)
8661                 return err;
8662
8663         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8664             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8665                 return -EOPNOTSUPP;
8666
8667         wiphy = &rdev->wiphy;
8668
8669         connect.bg_scan_period = -1;
8670         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8671                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8672                 connect.bg_scan_period =
8673                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8674         }
8675
8676         if (info->attrs[NL80211_ATTR_MAC])
8677                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8678         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8679                 connect.bssid_hint =
8680                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8681         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8682         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8683
8684         if (info->attrs[NL80211_ATTR_IE]) {
8685                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8686                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8687         }
8688
8689         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8690                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8691                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8692                     connect.mfp != NL80211_MFP_NO)
8693                         return -EINVAL;
8694         } else {
8695                 connect.mfp = NL80211_MFP_NO;
8696         }
8697
8698         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8699                 connect.prev_bssid =
8700                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8701
8702         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8703                 connect.channel = nl80211_get_valid_chan(
8704                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8705                 if (!connect.channel)
8706                         return -EINVAL;
8707         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8708                 connect.channel_hint = nl80211_get_valid_chan(
8709                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8710                 if (!connect.channel_hint)
8711                         return -EINVAL;
8712         }
8713
8714         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8715                 connkeys = nl80211_parse_connkeys(rdev,
8716                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8717                 if (IS_ERR(connkeys))
8718                         return PTR_ERR(connkeys);
8719         }
8720
8721         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8722                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8723
8724         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8725                 memcpy(&connect.ht_capa_mask,
8726                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8727                        sizeof(connect.ht_capa_mask));
8728
8729         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8730                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8731                         kzfree(connkeys);
8732                         return -EINVAL;
8733                 }
8734                 memcpy(&connect.ht_capa,
8735                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8736                        sizeof(connect.ht_capa));
8737         }
8738
8739         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8740                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8741
8742         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8743                 memcpy(&connect.vht_capa_mask,
8744                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8745                        sizeof(connect.vht_capa_mask));
8746
8747         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8748                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8749                         kzfree(connkeys);
8750                         return -EINVAL;
8751                 }
8752                 memcpy(&connect.vht_capa,
8753                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8754                        sizeof(connect.vht_capa));
8755         }
8756
8757         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8758                 if (!((rdev->wiphy.features &
8759                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8760                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8761                     !wiphy_ext_feature_isset(&rdev->wiphy,
8762                                              NL80211_EXT_FEATURE_RRM)) {
8763                         kzfree(connkeys);
8764                         return -EINVAL;
8765                 }
8766                 connect.flags |= ASSOC_REQ_USE_RRM;
8767         }
8768
8769         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8770         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8771                 kzfree(connkeys);
8772                 return -EOPNOTSUPP;
8773         }
8774
8775         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8776                 /* bss selection makes no sense if bssid is set */
8777                 if (connect.bssid) {
8778                         kzfree(connkeys);
8779                         return -EINVAL;
8780                 }
8781
8782                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8783                                        wiphy, &connect.bss_select);
8784                 if (err) {
8785                         kzfree(connkeys);
8786                         return err;
8787                 }
8788         }
8789
8790         wdev_lock(dev->ieee80211_ptr);
8791         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8792                                connect.prev_bssid);
8793         wdev_unlock(dev->ieee80211_ptr);
8794         if (err)
8795                 kzfree(connkeys);
8796         return err;
8797 }
8798
8799 static int nl80211_update_connect_params(struct sk_buff *skb,
8800                                          struct genl_info *info)
8801 {
8802         struct cfg80211_connect_params connect = {};
8803         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8804         struct net_device *dev = info->user_ptr[1];
8805         struct wireless_dev *wdev = dev->ieee80211_ptr;
8806         u32 changed = 0;
8807         int ret;
8808
8809         if (!rdev->ops->update_connect_params)
8810                 return -EOPNOTSUPP;
8811
8812         if (info->attrs[NL80211_ATTR_IE]) {
8813                 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8814                         return -EINVAL;
8815                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8816                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8817                 changed |= UPDATE_ASSOC_IES;
8818         }
8819
8820         wdev_lock(dev->ieee80211_ptr);
8821         if (!wdev->current_bss)
8822                 ret = -ENOLINK;
8823         else
8824                 ret = rdev_update_connect_params(rdev, dev, &connect, changed);
8825         wdev_unlock(dev->ieee80211_ptr);
8826
8827         return ret;
8828 }
8829
8830 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8831 {
8832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8833         struct net_device *dev = info->user_ptr[1];
8834         u16 reason;
8835         int ret;
8836
8837         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8838                 reason = WLAN_REASON_DEAUTH_LEAVING;
8839         else
8840                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8841
8842         if (reason == 0)
8843                 return -EINVAL;
8844
8845         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8846             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8847                 return -EOPNOTSUPP;
8848
8849         wdev_lock(dev->ieee80211_ptr);
8850         ret = cfg80211_disconnect(rdev, dev, reason, true);
8851         wdev_unlock(dev->ieee80211_ptr);
8852         return ret;
8853 }
8854
8855 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8856 {
8857         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8858         struct net *net;
8859         int err;
8860
8861         if (info->attrs[NL80211_ATTR_PID]) {
8862                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8863
8864                 net = get_net_ns_by_pid(pid);
8865         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8866                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8867
8868                 net = get_net_ns_by_fd(fd);
8869         } else {
8870                 return -EINVAL;
8871         }
8872
8873         if (IS_ERR(net))
8874                 return PTR_ERR(net);
8875
8876         err = 0;
8877
8878         /* check if anything to do */
8879         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8880                 err = cfg80211_switch_netns(rdev, net);
8881
8882         put_net(net);
8883         return err;
8884 }
8885
8886 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8887 {
8888         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8889         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8890                         struct cfg80211_pmksa *pmksa) = NULL;
8891         struct net_device *dev = info->user_ptr[1];
8892         struct cfg80211_pmksa pmksa;
8893
8894         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8895
8896         if (!info->attrs[NL80211_ATTR_MAC])
8897                 return -EINVAL;
8898
8899         if (!info->attrs[NL80211_ATTR_PMKID])
8900                 return -EINVAL;
8901
8902         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8903         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8904
8905         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8906             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8907                 return -EOPNOTSUPP;
8908
8909         switch (info->genlhdr->cmd) {
8910         case NL80211_CMD_SET_PMKSA:
8911                 rdev_ops = rdev->ops->set_pmksa;
8912                 break;
8913         case NL80211_CMD_DEL_PMKSA:
8914                 rdev_ops = rdev->ops->del_pmksa;
8915                 break;
8916         default:
8917                 WARN_ON(1);
8918                 break;
8919         }
8920
8921         if (!rdev_ops)
8922                 return -EOPNOTSUPP;
8923
8924         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8925 }
8926
8927 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8928 {
8929         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8930         struct net_device *dev = info->user_ptr[1];
8931
8932         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8933             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8934                 return -EOPNOTSUPP;
8935
8936         if (!rdev->ops->flush_pmksa)
8937                 return -EOPNOTSUPP;
8938
8939         return rdev_flush_pmksa(rdev, dev);
8940 }
8941
8942 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8943 {
8944         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8945         struct net_device *dev = info->user_ptr[1];
8946         u8 action_code, dialog_token;
8947         u32 peer_capability = 0;
8948         u16 status_code;
8949         u8 *peer;
8950         bool initiator;
8951
8952         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8953             !rdev->ops->tdls_mgmt)
8954                 return -EOPNOTSUPP;
8955
8956         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8957             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8958             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8959             !info->attrs[NL80211_ATTR_IE] ||
8960             !info->attrs[NL80211_ATTR_MAC])
8961                 return -EINVAL;
8962
8963         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8964         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8965         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8966         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8967         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8968         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8969                 peer_capability =
8970                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8971
8972         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8973                               dialog_token, status_code, peer_capability,
8974                               initiator,
8975                               nla_data(info->attrs[NL80211_ATTR_IE]),
8976                               nla_len(info->attrs[NL80211_ATTR_IE]));
8977 }
8978
8979 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8980 {
8981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8982         struct net_device *dev = info->user_ptr[1];
8983         enum nl80211_tdls_operation operation;
8984         u8 *peer;
8985
8986         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8987             !rdev->ops->tdls_oper)
8988                 return -EOPNOTSUPP;
8989
8990         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8991             !info->attrs[NL80211_ATTR_MAC])
8992                 return -EINVAL;
8993
8994         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8995         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8996
8997         return rdev_tdls_oper(rdev, dev, peer, operation);
8998 }
8999
9000 static int nl80211_remain_on_channel(struct sk_buff *skb,
9001                                      struct genl_info *info)
9002 {
9003         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9004         struct wireless_dev *wdev = info->user_ptr[1];
9005         struct cfg80211_chan_def chandef;
9006         struct sk_buff *msg;
9007         void *hdr;
9008         u64 cookie;
9009         u32 duration;
9010         int err;
9011
9012         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
9013             !info->attrs[NL80211_ATTR_DURATION])
9014                 return -EINVAL;
9015
9016         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9017
9018         if (!rdev->ops->remain_on_channel ||
9019             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
9020                 return -EOPNOTSUPP;
9021
9022         /*
9023          * We should be on that channel for at least a minimum amount of
9024          * time (10ms) but no longer than the driver supports.
9025          */
9026         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9027             duration > rdev->wiphy.max_remain_on_channel_duration)
9028                 return -EINVAL;
9029
9030         err = nl80211_parse_chandef(rdev, info, &chandef);
9031         if (err)
9032                 return err;
9033
9034         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9035         if (!msg)
9036                 return -ENOMEM;
9037
9038         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9039                              NL80211_CMD_REMAIN_ON_CHANNEL);
9040         if (!hdr) {
9041                 err = -ENOBUFS;
9042                 goto free_msg;
9043         }
9044
9045         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
9046                                      duration, &cookie);
9047
9048         if (err)
9049                 goto free_msg;
9050
9051         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9052                               NL80211_ATTR_PAD))
9053                 goto nla_put_failure;
9054
9055         genlmsg_end(msg, hdr);
9056
9057         return genlmsg_reply(msg, info);
9058
9059  nla_put_failure:
9060         err = -ENOBUFS;
9061  free_msg:
9062         nlmsg_free(msg);
9063         return err;
9064 }
9065
9066 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
9067                                             struct genl_info *info)
9068 {
9069         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9070         struct wireless_dev *wdev = info->user_ptr[1];
9071         u64 cookie;
9072
9073         if (!info->attrs[NL80211_ATTR_COOKIE])
9074                 return -EINVAL;
9075
9076         if (!rdev->ops->cancel_remain_on_channel)
9077                 return -EOPNOTSUPP;
9078
9079         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9080
9081         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
9082 }
9083
9084 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
9085                                        struct genl_info *info)
9086 {
9087         struct cfg80211_bitrate_mask mask;
9088         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9089         struct net_device *dev = info->user_ptr[1];
9090         int err;
9091
9092         if (!rdev->ops->set_bitrate_mask)
9093                 return -EOPNOTSUPP;
9094
9095         err = nl80211_parse_tx_bitrate_mask(info, &mask);
9096         if (err)
9097                 return err;
9098
9099         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
9100 }
9101
9102 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
9103 {
9104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9105         struct wireless_dev *wdev = info->user_ptr[1];
9106         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
9107
9108         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
9109                 return -EINVAL;
9110
9111         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
9112                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
9113
9114         switch (wdev->iftype) {
9115         case NL80211_IFTYPE_STATION:
9116         case NL80211_IFTYPE_ADHOC:
9117         case NL80211_IFTYPE_P2P_CLIENT:
9118         case NL80211_IFTYPE_AP:
9119         case NL80211_IFTYPE_AP_VLAN:
9120         case NL80211_IFTYPE_MESH_POINT:
9121         case NL80211_IFTYPE_P2P_GO:
9122         case NL80211_IFTYPE_P2P_DEVICE:
9123                 break;
9124         case NL80211_IFTYPE_NAN:
9125         default:
9126                 return -EOPNOTSUPP;
9127         }
9128
9129         /* not much point in registering if we can't reply */
9130         if (!rdev->ops->mgmt_tx)
9131                 return -EOPNOTSUPP;
9132
9133         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
9134                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
9135                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
9136 }
9137
9138 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
9139 {
9140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9141         struct wireless_dev *wdev = info->user_ptr[1];
9142         struct cfg80211_chan_def chandef;
9143         int err;
9144         void *hdr = NULL;
9145         u64 cookie;
9146         struct sk_buff *msg = NULL;
9147         struct cfg80211_mgmt_tx_params params = {
9148                 .dont_wait_for_ack =
9149                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
9150         };
9151
9152         if (!info->attrs[NL80211_ATTR_FRAME])
9153                 return -EINVAL;
9154
9155         if (!rdev->ops->mgmt_tx)
9156                 return -EOPNOTSUPP;
9157
9158         switch (wdev->iftype) {
9159         case NL80211_IFTYPE_P2P_DEVICE:
9160                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
9161                         return -EINVAL;
9162         case NL80211_IFTYPE_STATION:
9163         case NL80211_IFTYPE_ADHOC:
9164         case NL80211_IFTYPE_P2P_CLIENT:
9165         case NL80211_IFTYPE_AP:
9166         case NL80211_IFTYPE_AP_VLAN:
9167         case NL80211_IFTYPE_MESH_POINT:
9168         case NL80211_IFTYPE_P2P_GO:
9169                 break;
9170         case NL80211_IFTYPE_NAN:
9171         default:
9172                 return -EOPNOTSUPP;
9173         }
9174
9175         if (info->attrs[NL80211_ATTR_DURATION]) {
9176                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9177                         return -EINVAL;
9178                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9179
9180                 /*
9181                  * We should wait on the channel for at least a minimum amount
9182                  * of time (10ms) but no longer than the driver supports.
9183                  */
9184                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9185                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
9186                         return -EINVAL;
9187         }
9188
9189         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
9190
9191         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9192                 return -EINVAL;
9193
9194         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
9195
9196         /* get the channel if any has been specified, otherwise pass NULL to
9197          * the driver. The latter will use the current one
9198          */
9199         chandef.chan = NULL;
9200         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9201                 err = nl80211_parse_chandef(rdev, info, &chandef);
9202                 if (err)
9203                         return err;
9204         }
9205
9206         if (!chandef.chan && params.offchan)
9207                 return -EINVAL;
9208
9209         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
9210         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
9211
9212         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
9213                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9214                 int i;
9215
9216                 if (len % sizeof(u16))
9217                         return -EINVAL;
9218
9219                 params.n_csa_offsets = len / sizeof(u16);
9220                 params.csa_offsets =
9221                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9222
9223                 /* check that all the offsets fit the frame */
9224                 for (i = 0; i < params.n_csa_offsets; i++) {
9225                         if (params.csa_offsets[i] >= params.len)
9226                                 return -EINVAL;
9227                 }
9228         }
9229
9230         if (!params.dont_wait_for_ack) {
9231                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9232                 if (!msg)
9233                         return -ENOMEM;
9234
9235                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9236                                      NL80211_CMD_FRAME);
9237                 if (!hdr) {
9238                         err = -ENOBUFS;
9239                         goto free_msg;
9240                 }
9241         }
9242
9243         params.chan = chandef.chan;
9244         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
9245         if (err)
9246                 goto free_msg;
9247
9248         if (msg) {
9249                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9250                                       NL80211_ATTR_PAD))
9251                         goto nla_put_failure;
9252
9253                 genlmsg_end(msg, hdr);
9254                 return genlmsg_reply(msg, info);
9255         }
9256
9257         return 0;
9258
9259  nla_put_failure:
9260         err = -ENOBUFS;
9261  free_msg:
9262         nlmsg_free(msg);
9263         return err;
9264 }
9265
9266 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9267 {
9268         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9269         struct wireless_dev *wdev = info->user_ptr[1];
9270         u64 cookie;
9271
9272         if (!info->attrs[NL80211_ATTR_COOKIE])
9273                 return -EINVAL;
9274
9275         if (!rdev->ops->mgmt_tx_cancel_wait)
9276                 return -EOPNOTSUPP;
9277
9278         switch (wdev->iftype) {
9279         case NL80211_IFTYPE_STATION:
9280         case NL80211_IFTYPE_ADHOC:
9281         case NL80211_IFTYPE_P2P_CLIENT:
9282         case NL80211_IFTYPE_AP:
9283         case NL80211_IFTYPE_AP_VLAN:
9284         case NL80211_IFTYPE_P2P_GO:
9285         case NL80211_IFTYPE_P2P_DEVICE:
9286                 break;
9287         case NL80211_IFTYPE_NAN:
9288         default:
9289                 return -EOPNOTSUPP;
9290         }
9291
9292         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9293
9294         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9295 }
9296
9297 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9298 {
9299         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9300         struct wireless_dev *wdev;
9301         struct net_device *dev = info->user_ptr[1];
9302         u8 ps_state;
9303         bool state;
9304         int err;
9305
9306         if (!info->attrs[NL80211_ATTR_PS_STATE])
9307                 return -EINVAL;
9308
9309         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9310
9311         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9312                 return -EINVAL;
9313
9314         wdev = dev->ieee80211_ptr;
9315
9316         if (!rdev->ops->set_power_mgmt)
9317                 return -EOPNOTSUPP;
9318
9319         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9320
9321         if (state == wdev->ps)
9322                 return 0;
9323
9324         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9325         if (!err)
9326                 wdev->ps = state;
9327         return err;
9328 }
9329
9330 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9331 {
9332         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9333         enum nl80211_ps_state ps_state;
9334         struct wireless_dev *wdev;
9335         struct net_device *dev = info->user_ptr[1];
9336         struct sk_buff *msg;
9337         void *hdr;
9338         int err;
9339
9340         wdev = dev->ieee80211_ptr;
9341
9342         if (!rdev->ops->set_power_mgmt)
9343                 return -EOPNOTSUPP;
9344
9345         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9346         if (!msg)
9347                 return -ENOMEM;
9348
9349         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9350                              NL80211_CMD_GET_POWER_SAVE);
9351         if (!hdr) {
9352                 err = -ENOBUFS;
9353                 goto free_msg;
9354         }
9355
9356         if (wdev->ps)
9357                 ps_state = NL80211_PS_ENABLED;
9358         else
9359                 ps_state = NL80211_PS_DISABLED;
9360
9361         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9362                 goto nla_put_failure;
9363
9364         genlmsg_end(msg, hdr);
9365         return genlmsg_reply(msg, info);
9366
9367  nla_put_failure:
9368         err = -ENOBUFS;
9369  free_msg:
9370         nlmsg_free(msg);
9371         return err;
9372 }
9373
9374 static const struct nla_policy
9375 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9376         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
9377         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9378         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9379         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9380         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9381         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9382 };
9383
9384 static int nl80211_set_cqm_txe(struct genl_info *info,
9385                                u32 rate, u32 pkts, u32 intvl)
9386 {
9387         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9388         struct net_device *dev = info->user_ptr[1];
9389         struct wireless_dev *wdev = dev->ieee80211_ptr;
9390
9391         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9392                 return -EINVAL;
9393
9394         if (!rdev->ops->set_cqm_txe_config)
9395                 return -EOPNOTSUPP;
9396
9397         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9398             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9399                 return -EOPNOTSUPP;
9400
9401         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9402 }
9403
9404 static int nl80211_set_cqm_rssi(struct genl_info *info,
9405                                 s32 threshold, u32 hysteresis)
9406 {
9407         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9408         struct net_device *dev = info->user_ptr[1];
9409         struct wireless_dev *wdev = dev->ieee80211_ptr;
9410
9411         if (threshold > 0)
9412                 return -EINVAL;
9413
9414         /* disabling - hysteresis should also be zero then */
9415         if (threshold == 0)
9416                 hysteresis = 0;
9417
9418         if (!rdev->ops->set_cqm_rssi_config)
9419                 return -EOPNOTSUPP;
9420
9421         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9422             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9423                 return -EOPNOTSUPP;
9424
9425         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9426 }
9427
9428 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9429 {
9430         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9431         struct nlattr *cqm;
9432         int err;
9433
9434         cqm = info->attrs[NL80211_ATTR_CQM];
9435         if (!cqm)
9436                 return -EINVAL;
9437
9438         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9439                                nl80211_attr_cqm_policy);
9440         if (err)
9441                 return err;
9442
9443         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9444             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9445                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9446                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9447
9448                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9449         }
9450
9451         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9452             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9453             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9454                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9455                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9456                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9457
9458                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9459         }
9460
9461         return -EINVAL;
9462 }
9463
9464 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9465 {
9466         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9467         struct net_device *dev = info->user_ptr[1];
9468         struct ocb_setup setup = {};
9469         int err;
9470
9471         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9472         if (err)
9473                 return err;
9474
9475         return cfg80211_join_ocb(rdev, dev, &setup);
9476 }
9477
9478 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9479 {
9480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9481         struct net_device *dev = info->user_ptr[1];
9482
9483         return cfg80211_leave_ocb(rdev, dev);
9484 }
9485
9486 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9487 {
9488         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9489         struct net_device *dev = info->user_ptr[1];
9490         struct mesh_config cfg;
9491         struct mesh_setup setup;
9492         int err;
9493
9494         /* start with default */
9495         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9496         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9497
9498         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9499                 /* and parse parameters if given */
9500                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9501                 if (err)
9502                         return err;
9503         }
9504
9505         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9506             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9507                 return -EINVAL;
9508
9509         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9510         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9511
9512         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9513             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9514                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9515                         return -EINVAL;
9516
9517         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9518                 setup.beacon_interval =
9519                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9520
9521                 err = cfg80211_validate_beacon_int(rdev,
9522                                                    NL80211_IFTYPE_MESH_POINT,
9523                                                    setup.beacon_interval);
9524                 if (err)
9525                         return err;
9526         }
9527
9528         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9529                 setup.dtim_period =
9530                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9531                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9532                         return -EINVAL;
9533         }
9534
9535         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9536                 /* parse additional setup parameters if given */
9537                 err = nl80211_parse_mesh_setup(info, &setup);
9538                 if (err)
9539                         return err;
9540         }
9541
9542         if (setup.user_mpm)
9543                 cfg.auto_open_plinks = false;
9544
9545         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9546                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9547                 if (err)
9548                         return err;
9549         } else {
9550                 /* cfg80211_join_mesh() will sort it out */
9551                 setup.chandef.chan = NULL;
9552         }
9553
9554         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9555                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9556                 int n_rates =
9557                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9558                 struct ieee80211_supported_band *sband;
9559
9560                 if (!setup.chandef.chan)
9561                         return -EINVAL;
9562
9563                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9564
9565                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9566                                              &setup.basic_rates);
9567                 if (err)
9568                         return err;
9569         }
9570
9571         if (info->attrs[NL80211_ATTR_TX_RATES]) {
9572                 err = nl80211_parse_tx_bitrate_mask(info, &setup.beacon_rate);
9573                 if (err)
9574                         return err;
9575
9576                 err = validate_beacon_tx_rate(rdev, setup.chandef.chan->band,
9577                                               &setup.beacon_rate);
9578                 if (err)
9579                         return err;
9580         }
9581
9582         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9583 }
9584
9585 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9586 {
9587         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9588         struct net_device *dev = info->user_ptr[1];
9589
9590         return cfg80211_leave_mesh(rdev, dev);
9591 }
9592
9593 #ifdef CONFIG_PM
9594 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9595                                         struct cfg80211_registered_device *rdev)
9596 {
9597         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9598         struct nlattr *nl_pats, *nl_pat;
9599         int i, pat_len;
9600
9601         if (!wowlan->n_patterns)
9602                 return 0;
9603
9604         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9605         if (!nl_pats)
9606                 return -ENOBUFS;
9607
9608         for (i = 0; i < wowlan->n_patterns; i++) {
9609                 nl_pat = nla_nest_start(msg, i + 1);
9610                 if (!nl_pat)
9611                         return -ENOBUFS;
9612                 pat_len = wowlan->patterns[i].pattern_len;
9613                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9614                             wowlan->patterns[i].mask) ||
9615                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9616                             wowlan->patterns[i].pattern) ||
9617                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9618                                 wowlan->patterns[i].pkt_offset))
9619                         return -ENOBUFS;
9620                 nla_nest_end(msg, nl_pat);
9621         }
9622         nla_nest_end(msg, nl_pats);
9623
9624         return 0;
9625 }
9626
9627 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9628                                    struct cfg80211_wowlan_tcp *tcp)
9629 {
9630         struct nlattr *nl_tcp;
9631
9632         if (!tcp)
9633                 return 0;
9634
9635         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9636         if (!nl_tcp)
9637                 return -ENOBUFS;
9638
9639         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9640             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9641             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9642             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9643             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9644             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9645                     tcp->payload_len, tcp->payload) ||
9646             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9647                         tcp->data_interval) ||
9648             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9649                     tcp->wake_len, tcp->wake_data) ||
9650             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9651                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9652                 return -ENOBUFS;
9653
9654         if (tcp->payload_seq.len &&
9655             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9656                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9657                 return -ENOBUFS;
9658
9659         if (tcp->payload_tok.len &&
9660             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9661                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9662                     &tcp->payload_tok))
9663                 return -ENOBUFS;
9664
9665         nla_nest_end(msg, nl_tcp);
9666
9667         return 0;
9668 }
9669
9670 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9671                                   struct cfg80211_sched_scan_request *req)
9672 {
9673         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9674         int i;
9675
9676         if (!req)
9677                 return 0;
9678
9679         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9680         if (!nd)
9681                 return -ENOBUFS;
9682
9683         if (req->n_scan_plans == 1 &&
9684             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9685                         req->scan_plans[0].interval * 1000))
9686                 return -ENOBUFS;
9687
9688         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9689                 return -ENOBUFS;
9690
9691         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9692         if (!freqs)
9693                 return -ENOBUFS;
9694
9695         for (i = 0; i < req->n_channels; i++) {
9696                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9697                         return -ENOBUFS;
9698         }
9699
9700         nla_nest_end(msg, freqs);
9701
9702         if (req->n_match_sets) {
9703                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9704                 if (!matches)
9705                         return -ENOBUFS;
9706
9707                 for (i = 0; i < req->n_match_sets; i++) {
9708                         match = nla_nest_start(msg, i);
9709                         if (!match)
9710                                 return -ENOBUFS;
9711
9712                         if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9713                                     req->match_sets[i].ssid.ssid_len,
9714                                     req->match_sets[i].ssid.ssid))
9715                                 return -ENOBUFS;
9716                         nla_nest_end(msg, match);
9717                 }
9718                 nla_nest_end(msg, matches);
9719         }
9720
9721         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9722         if (!scan_plans)
9723                 return -ENOBUFS;
9724
9725         for (i = 0; i < req->n_scan_plans; i++) {
9726                 scan_plan = nla_nest_start(msg, i + 1);
9727                 if (!scan_plan)
9728                         return -ENOBUFS;
9729
9730                 if (!scan_plan ||
9731                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9732                                 req->scan_plans[i].interval) ||
9733                     (req->scan_plans[i].iterations &&
9734                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9735                                  req->scan_plans[i].iterations)))
9736                         return -ENOBUFS;
9737                 nla_nest_end(msg, scan_plan);
9738         }
9739         nla_nest_end(msg, scan_plans);
9740
9741         nla_nest_end(msg, nd);
9742
9743         return 0;
9744 }
9745
9746 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9747 {
9748         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9749         struct sk_buff *msg;
9750         void *hdr;
9751         u32 size = NLMSG_DEFAULT_SIZE;
9752
9753         if (!rdev->wiphy.wowlan)
9754                 return -EOPNOTSUPP;
9755
9756         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9757                 /* adjust size to have room for all the data */
9758                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9759                         rdev->wiphy.wowlan_config->tcp->payload_len +
9760                         rdev->wiphy.wowlan_config->tcp->wake_len +
9761                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9762         }
9763
9764         msg = nlmsg_new(size, GFP_KERNEL);
9765         if (!msg)
9766                 return -ENOMEM;
9767
9768         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9769                              NL80211_CMD_GET_WOWLAN);
9770         if (!hdr)
9771                 goto nla_put_failure;
9772
9773         if (rdev->wiphy.wowlan_config) {
9774                 struct nlattr *nl_wowlan;
9775
9776                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9777                 if (!nl_wowlan)
9778                         goto nla_put_failure;
9779
9780                 if ((rdev->wiphy.wowlan_config->any &&
9781                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9782                     (rdev->wiphy.wowlan_config->disconnect &&
9783                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9784                     (rdev->wiphy.wowlan_config->magic_pkt &&
9785                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9786                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9787                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9788                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9789                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9790                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9791                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9792                     (rdev->wiphy.wowlan_config->rfkill_release &&
9793                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9794                         goto nla_put_failure;
9795
9796                 if (nl80211_send_wowlan_patterns(msg, rdev))
9797                         goto nla_put_failure;
9798
9799                 if (nl80211_send_wowlan_tcp(msg,
9800                                             rdev->wiphy.wowlan_config->tcp))
9801                         goto nla_put_failure;
9802
9803                 if (nl80211_send_wowlan_nd(
9804                             msg,
9805                             rdev->wiphy.wowlan_config->nd_config))
9806                         goto nla_put_failure;
9807
9808                 nla_nest_end(msg, nl_wowlan);
9809         }
9810
9811         genlmsg_end(msg, hdr);
9812         return genlmsg_reply(msg, info);
9813
9814 nla_put_failure:
9815         nlmsg_free(msg);
9816         return -ENOBUFS;
9817 }
9818
9819 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9820                                     struct nlattr *attr,
9821                                     struct cfg80211_wowlan *trig)
9822 {
9823         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9824         struct cfg80211_wowlan_tcp *cfg;
9825         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9826         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9827         u32 size;
9828         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9829         int err, port;
9830
9831         if (!rdev->wiphy.wowlan->tcp)
9832                 return -EINVAL;
9833
9834         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TCP, attr,
9835                                nl80211_wowlan_tcp_policy);
9836         if (err)
9837                 return err;
9838
9839         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9840             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9841             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9842             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9843             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9844             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9845             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9846             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9847                 return -EINVAL;
9848
9849         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9850         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9851                 return -EINVAL;
9852
9853         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9854                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9855             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9856                 return -EINVAL;
9857
9858         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9859         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9860                 return -EINVAL;
9861
9862         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9863         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9864                 return -EINVAL;
9865
9866         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9867                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9868
9869                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9870                 tokens_size = tokln - sizeof(*tok);
9871
9872                 if (!tok->len || tokens_size % tok->len)
9873                         return -EINVAL;
9874                 if (!rdev->wiphy.wowlan->tcp->tok)
9875                         return -EINVAL;
9876                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9877                         return -EINVAL;
9878                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9879                         return -EINVAL;
9880                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9881                         return -EINVAL;
9882                 if (tok->offset + tok->len > data_size)
9883                         return -EINVAL;
9884         }
9885
9886         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9887                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9888                 if (!rdev->wiphy.wowlan->tcp->seq)
9889                         return -EINVAL;
9890                 if (seq->len == 0 || seq->len > 4)
9891                         return -EINVAL;
9892                 if (seq->len + seq->offset > data_size)
9893                         return -EINVAL;
9894         }
9895
9896         size = sizeof(*cfg);
9897         size += data_size;
9898         size += wake_size + wake_mask_size;
9899         size += tokens_size;
9900
9901         cfg = kzalloc(size, GFP_KERNEL);
9902         if (!cfg)
9903                 return -ENOMEM;
9904         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9905         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9906         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9907                ETH_ALEN);
9908         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9909                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9910         else
9911                 port = 0;
9912 #ifdef CONFIG_INET
9913         /* allocate a socket and port for it and use it */
9914         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9915                             IPPROTO_TCP, &cfg->sock, 1);
9916         if (err) {
9917                 kfree(cfg);
9918                 return err;
9919         }
9920         if (inet_csk_get_port(cfg->sock->sk, port)) {
9921                 sock_release(cfg->sock);
9922                 kfree(cfg);
9923                 return -EADDRINUSE;
9924         }
9925         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9926 #else
9927         if (!port) {
9928                 kfree(cfg);
9929                 return -EINVAL;
9930         }
9931         cfg->src_port = port;
9932 #endif
9933
9934         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9935         cfg->payload_len = data_size;
9936         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9937         memcpy((void *)cfg->payload,
9938                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9939                data_size);
9940         if (seq)
9941                 cfg->payload_seq = *seq;
9942         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9943         cfg->wake_len = wake_size;
9944         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9945         memcpy((void *)cfg->wake_data,
9946                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9947                wake_size);
9948         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9949                          data_size + wake_size;
9950         memcpy((void *)cfg->wake_mask,
9951                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9952                wake_mask_size);
9953         if (tok) {
9954                 cfg->tokens_size = tokens_size;
9955                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9956         }
9957
9958         trig->tcp = cfg;
9959
9960         return 0;
9961 }
9962
9963 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9964                                    const struct wiphy_wowlan_support *wowlan,
9965                                    struct nlattr *attr,
9966                                    struct cfg80211_wowlan *trig)
9967 {
9968         struct nlattr **tb;
9969         int err;
9970
9971         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9972         if (!tb)
9973                 return -ENOMEM;
9974
9975         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9976                 err = -EOPNOTSUPP;
9977                 goto out;
9978         }
9979
9980         err = nla_parse_nested(tb, NL80211_ATTR_MAX, attr, nl80211_policy);
9981         if (err)
9982                 goto out;
9983
9984         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9985         err = PTR_ERR_OR_ZERO(trig->nd_config);
9986         if (err)
9987                 trig->nd_config = NULL;
9988
9989 out:
9990         kfree(tb);
9991         return err;
9992 }
9993
9994 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9995 {
9996         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9997         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9998         struct cfg80211_wowlan new_triggers = {};
9999         struct cfg80211_wowlan *ntrig;
10000         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
10001         int err, i;
10002         bool prev_enabled = rdev->wiphy.wowlan_config;
10003         bool regular = false;
10004
10005         if (!wowlan)
10006                 return -EOPNOTSUPP;
10007
10008         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
10009                 cfg80211_rdev_free_wowlan(rdev);
10010                 rdev->wiphy.wowlan_config = NULL;
10011                 goto set_wakeup;
10012         }
10013
10014         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TRIG,
10015                                info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS],
10016                                nl80211_wowlan_policy);
10017         if (err)
10018                 return err;
10019
10020         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
10021                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
10022                         return -EINVAL;
10023                 new_triggers.any = true;
10024         }
10025
10026         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
10027                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
10028                         return -EINVAL;
10029                 new_triggers.disconnect = true;
10030                 regular = true;
10031         }
10032
10033         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
10034                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
10035                         return -EINVAL;
10036                 new_triggers.magic_pkt = true;
10037                 regular = true;
10038         }
10039
10040         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
10041                 return -EINVAL;
10042
10043         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
10044                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
10045                         return -EINVAL;
10046                 new_triggers.gtk_rekey_failure = true;
10047                 regular = true;
10048         }
10049
10050         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
10051                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
10052                         return -EINVAL;
10053                 new_triggers.eap_identity_req = true;
10054                 regular = true;
10055         }
10056
10057         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
10058                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
10059                         return -EINVAL;
10060                 new_triggers.four_way_handshake = true;
10061                 regular = true;
10062         }
10063
10064         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
10065                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
10066                         return -EINVAL;
10067                 new_triggers.rfkill_release = true;
10068                 regular = true;
10069         }
10070
10071         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
10072                 struct nlattr *pat;
10073                 int n_patterns = 0;
10074                 int rem, pat_len, mask_len, pkt_offset;
10075                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10076
10077                 regular = true;
10078
10079                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10080                                     rem)
10081                         n_patterns++;
10082                 if (n_patterns > wowlan->n_patterns)
10083                         return -EINVAL;
10084
10085                 new_triggers.patterns = kcalloc(n_patterns,
10086                                                 sizeof(new_triggers.patterns[0]),
10087                                                 GFP_KERNEL);
10088                 if (!new_triggers.patterns)
10089                         return -ENOMEM;
10090
10091                 new_triggers.n_patterns = n_patterns;
10092                 i = 0;
10093
10094                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10095                                     rem) {
10096                         u8 *mask_pat;
10097
10098                         nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
10099                                          NULL);
10100                         err = -EINVAL;
10101                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
10102                             !pat_tb[NL80211_PKTPAT_PATTERN])
10103                                 goto error;
10104                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10105                         mask_len = DIV_ROUND_UP(pat_len, 8);
10106                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10107                                 goto error;
10108                         if (pat_len > wowlan->pattern_max_len ||
10109                             pat_len < wowlan->pattern_min_len)
10110                                 goto error;
10111
10112                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
10113                                 pkt_offset = 0;
10114                         else
10115                                 pkt_offset = nla_get_u32(
10116                                         pat_tb[NL80211_PKTPAT_OFFSET]);
10117                         if (pkt_offset > wowlan->max_pkt_offset)
10118                                 goto error;
10119                         new_triggers.patterns[i].pkt_offset = pkt_offset;
10120
10121                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10122                         if (!mask_pat) {
10123                                 err = -ENOMEM;
10124                                 goto error;
10125                         }
10126                         new_triggers.patterns[i].mask = mask_pat;
10127                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10128                                mask_len);
10129                         mask_pat += mask_len;
10130                         new_triggers.patterns[i].pattern = mask_pat;
10131                         new_triggers.patterns[i].pattern_len = pat_len;
10132                         memcpy(mask_pat,
10133                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10134                                pat_len);
10135                         i++;
10136                 }
10137         }
10138
10139         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
10140                 regular = true;
10141                 err = nl80211_parse_wowlan_tcp(
10142                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
10143                         &new_triggers);
10144                 if (err)
10145                         goto error;
10146         }
10147
10148         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
10149                 regular = true;
10150                 err = nl80211_parse_wowlan_nd(
10151                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
10152                         &new_triggers);
10153                 if (err)
10154                         goto error;
10155         }
10156
10157         /* The 'any' trigger means the device continues operating more or less
10158          * as in its normal operation mode and wakes up the host on most of the
10159          * normal interrupts (like packet RX, ...)
10160          * It therefore makes little sense to combine with the more constrained
10161          * wakeup trigger modes.
10162          */
10163         if (new_triggers.any && regular) {
10164                 err = -EINVAL;
10165                 goto error;
10166         }
10167
10168         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
10169         if (!ntrig) {
10170                 err = -ENOMEM;
10171                 goto error;
10172         }
10173         cfg80211_rdev_free_wowlan(rdev);
10174         rdev->wiphy.wowlan_config = ntrig;
10175
10176  set_wakeup:
10177         if (rdev->ops->set_wakeup &&
10178             prev_enabled != !!rdev->wiphy.wowlan_config)
10179                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
10180
10181         return 0;
10182  error:
10183         for (i = 0; i < new_triggers.n_patterns; i++)
10184                 kfree(new_triggers.patterns[i].mask);
10185         kfree(new_triggers.patterns);
10186         if (new_triggers.tcp && new_triggers.tcp->sock)
10187                 sock_release(new_triggers.tcp->sock);
10188         kfree(new_triggers.tcp);
10189         kfree(new_triggers.nd_config);
10190         return err;
10191 }
10192 #endif
10193
10194 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
10195                                        struct cfg80211_registered_device *rdev)
10196 {
10197         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
10198         int i, j, pat_len;
10199         struct cfg80211_coalesce_rules *rule;
10200
10201         if (!rdev->coalesce->n_rules)
10202                 return 0;
10203
10204         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
10205         if (!nl_rules)
10206                 return -ENOBUFS;
10207
10208         for (i = 0; i < rdev->coalesce->n_rules; i++) {
10209                 nl_rule = nla_nest_start(msg, i + 1);
10210                 if (!nl_rule)
10211                         return -ENOBUFS;
10212
10213                 rule = &rdev->coalesce->rules[i];
10214                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
10215                                 rule->delay))
10216                         return -ENOBUFS;
10217
10218                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
10219                                 rule->condition))
10220                         return -ENOBUFS;
10221
10222                 nl_pats = nla_nest_start(msg,
10223                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
10224                 if (!nl_pats)
10225                         return -ENOBUFS;
10226
10227                 for (j = 0; j < rule->n_patterns; j++) {
10228                         nl_pat = nla_nest_start(msg, j + 1);
10229                         if (!nl_pat)
10230                                 return -ENOBUFS;
10231                         pat_len = rule->patterns[j].pattern_len;
10232                         if (nla_put(msg, NL80211_PKTPAT_MASK,
10233                                     DIV_ROUND_UP(pat_len, 8),
10234                                     rule->patterns[j].mask) ||
10235                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10236                                     rule->patterns[j].pattern) ||
10237                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10238                                         rule->patterns[j].pkt_offset))
10239                                 return -ENOBUFS;
10240                         nla_nest_end(msg, nl_pat);
10241                 }
10242                 nla_nest_end(msg, nl_pats);
10243                 nla_nest_end(msg, nl_rule);
10244         }
10245         nla_nest_end(msg, nl_rules);
10246
10247         return 0;
10248 }
10249
10250 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
10251 {
10252         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10253         struct sk_buff *msg;
10254         void *hdr;
10255
10256         if (!rdev->wiphy.coalesce)
10257                 return -EOPNOTSUPP;
10258
10259         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10260         if (!msg)
10261                 return -ENOMEM;
10262
10263         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10264                              NL80211_CMD_GET_COALESCE);
10265         if (!hdr)
10266                 goto nla_put_failure;
10267
10268         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
10269                 goto nla_put_failure;
10270
10271         genlmsg_end(msg, hdr);
10272         return genlmsg_reply(msg, info);
10273
10274 nla_put_failure:
10275         nlmsg_free(msg);
10276         return -ENOBUFS;
10277 }
10278
10279 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
10280 {
10281         struct cfg80211_coalesce *coalesce = rdev->coalesce;
10282         int i, j;
10283         struct cfg80211_coalesce_rules *rule;
10284
10285         if (!coalesce)
10286                 return;
10287
10288         for (i = 0; i < coalesce->n_rules; i++) {
10289                 rule = &coalesce->rules[i];
10290                 for (j = 0; j < rule->n_patterns; j++)
10291                         kfree(rule->patterns[j].mask);
10292                 kfree(rule->patterns);
10293         }
10294         kfree(coalesce->rules);
10295         kfree(coalesce);
10296         rdev->coalesce = NULL;
10297 }
10298
10299 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10300                                        struct nlattr *rule,
10301                                        struct cfg80211_coalesce_rules *new_rule)
10302 {
10303         int err, i;
10304         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10305         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10306         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10307         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10308
10309         err = nla_parse_nested(tb, NL80211_ATTR_COALESCE_RULE_MAX, rule,
10310                                nl80211_coalesce_policy);
10311         if (err)
10312                 return err;
10313
10314         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10315                 new_rule->delay =
10316                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10317         if (new_rule->delay > coalesce->max_delay)
10318                 return -EINVAL;
10319
10320         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10321                 new_rule->condition =
10322                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10323         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10324             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10325                 return -EINVAL;
10326
10327         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10328                 return -EINVAL;
10329
10330         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10331                             rem)
10332                 n_patterns++;
10333         if (n_patterns > coalesce->n_patterns)
10334                 return -EINVAL;
10335
10336         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10337                                      GFP_KERNEL);
10338         if (!new_rule->patterns)
10339                 return -ENOMEM;
10340
10341         new_rule->n_patterns = n_patterns;
10342         i = 0;
10343
10344         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10345                             rem) {
10346                 u8 *mask_pat;
10347
10348                 nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat, NULL);
10349                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10350                     !pat_tb[NL80211_PKTPAT_PATTERN])
10351                         return -EINVAL;
10352                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10353                 mask_len = DIV_ROUND_UP(pat_len, 8);
10354                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10355                         return -EINVAL;
10356                 if (pat_len > coalesce->pattern_max_len ||
10357                     pat_len < coalesce->pattern_min_len)
10358                         return -EINVAL;
10359
10360                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10361                         pkt_offset = 0;
10362                 else
10363                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10364                 if (pkt_offset > coalesce->max_pkt_offset)
10365                         return -EINVAL;
10366                 new_rule->patterns[i].pkt_offset = pkt_offset;
10367
10368                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10369                 if (!mask_pat)
10370                         return -ENOMEM;
10371
10372                 new_rule->patterns[i].mask = mask_pat;
10373                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10374                        mask_len);
10375
10376                 mask_pat += mask_len;
10377                 new_rule->patterns[i].pattern = mask_pat;
10378                 new_rule->patterns[i].pattern_len = pat_len;
10379                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10380                        pat_len);
10381                 i++;
10382         }
10383
10384         return 0;
10385 }
10386
10387 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10388 {
10389         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10390         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10391         struct cfg80211_coalesce new_coalesce = {};
10392         struct cfg80211_coalesce *n_coalesce;
10393         int err, rem_rule, n_rules = 0, i, j;
10394         struct nlattr *rule;
10395         struct cfg80211_coalesce_rules *tmp_rule;
10396
10397         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10398                 return -EOPNOTSUPP;
10399
10400         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10401                 cfg80211_rdev_free_coalesce(rdev);
10402                 rdev_set_coalesce(rdev, NULL);
10403                 return 0;
10404         }
10405
10406         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10407                             rem_rule)
10408                 n_rules++;
10409         if (n_rules > coalesce->n_rules)
10410                 return -EINVAL;
10411
10412         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10413                                      GFP_KERNEL);
10414         if (!new_coalesce.rules)
10415                 return -ENOMEM;
10416
10417         new_coalesce.n_rules = n_rules;
10418         i = 0;
10419
10420         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10421                             rem_rule) {
10422                 err = nl80211_parse_coalesce_rule(rdev, rule,
10423                                                   &new_coalesce.rules[i]);
10424                 if (err)
10425                         goto error;
10426
10427                 i++;
10428         }
10429
10430         err = rdev_set_coalesce(rdev, &new_coalesce);
10431         if (err)
10432                 goto error;
10433
10434         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10435         if (!n_coalesce) {
10436                 err = -ENOMEM;
10437                 goto error;
10438         }
10439         cfg80211_rdev_free_coalesce(rdev);
10440         rdev->coalesce = n_coalesce;
10441
10442         return 0;
10443 error:
10444         for (i = 0; i < new_coalesce.n_rules; i++) {
10445                 tmp_rule = &new_coalesce.rules[i];
10446                 for (j = 0; j < tmp_rule->n_patterns; j++)
10447                         kfree(tmp_rule->patterns[j].mask);
10448                 kfree(tmp_rule->patterns);
10449         }
10450         kfree(new_coalesce.rules);
10451
10452         return err;
10453 }
10454
10455 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10456 {
10457         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10458         struct net_device *dev = info->user_ptr[1];
10459         struct wireless_dev *wdev = dev->ieee80211_ptr;
10460         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10461         struct cfg80211_gtk_rekey_data rekey_data;
10462         int err;
10463
10464         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10465                 return -EINVAL;
10466
10467         err = nla_parse_nested(tb, MAX_NL80211_REKEY_DATA,
10468                                info->attrs[NL80211_ATTR_REKEY_DATA],
10469                                nl80211_rekey_policy);
10470         if (err)
10471                 return err;
10472
10473         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10474                 return -ERANGE;
10475         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10476                 return -ERANGE;
10477         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10478                 return -ERANGE;
10479
10480         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10481         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10482         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10483
10484         wdev_lock(wdev);
10485         if (!wdev->current_bss) {
10486                 err = -ENOTCONN;
10487                 goto out;
10488         }
10489
10490         if (!rdev->ops->set_rekey_data) {
10491                 err = -EOPNOTSUPP;
10492                 goto out;
10493         }
10494
10495         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10496  out:
10497         wdev_unlock(wdev);
10498         return err;
10499 }
10500
10501 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10502                                              struct genl_info *info)
10503 {
10504         struct net_device *dev = info->user_ptr[1];
10505         struct wireless_dev *wdev = dev->ieee80211_ptr;
10506
10507         if (wdev->iftype != NL80211_IFTYPE_AP &&
10508             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10509                 return -EINVAL;
10510
10511         if (wdev->ap_unexpected_nlportid)
10512                 return -EBUSY;
10513
10514         wdev->ap_unexpected_nlportid = info->snd_portid;
10515         return 0;
10516 }
10517
10518 static int nl80211_probe_client(struct sk_buff *skb,
10519                                 struct genl_info *info)
10520 {
10521         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10522         struct net_device *dev = info->user_ptr[1];
10523         struct wireless_dev *wdev = dev->ieee80211_ptr;
10524         struct sk_buff *msg;
10525         void *hdr;
10526         const u8 *addr;
10527         u64 cookie;
10528         int err;
10529
10530         if (wdev->iftype != NL80211_IFTYPE_AP &&
10531             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10532                 return -EOPNOTSUPP;
10533
10534         if (!info->attrs[NL80211_ATTR_MAC])
10535                 return -EINVAL;
10536
10537         if (!rdev->ops->probe_client)
10538                 return -EOPNOTSUPP;
10539
10540         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10541         if (!msg)
10542                 return -ENOMEM;
10543
10544         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10545                              NL80211_CMD_PROBE_CLIENT);
10546         if (!hdr) {
10547                 err = -ENOBUFS;
10548                 goto free_msg;
10549         }
10550
10551         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10552
10553         err = rdev_probe_client(rdev, dev, addr, &cookie);
10554         if (err)
10555                 goto free_msg;
10556
10557         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10558                               NL80211_ATTR_PAD))
10559                 goto nla_put_failure;
10560
10561         genlmsg_end(msg, hdr);
10562
10563         return genlmsg_reply(msg, info);
10564
10565  nla_put_failure:
10566         err = -ENOBUFS;
10567  free_msg:
10568         nlmsg_free(msg);
10569         return err;
10570 }
10571
10572 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10573 {
10574         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10575         struct cfg80211_beacon_registration *reg, *nreg;
10576         int rv;
10577
10578         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10579                 return -EOPNOTSUPP;
10580
10581         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10582         if (!nreg)
10583                 return -ENOMEM;
10584
10585         /* First, check if already registered. */
10586         spin_lock_bh(&rdev->beacon_registrations_lock);
10587         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10588                 if (reg->nlportid == info->snd_portid) {
10589                         rv = -EALREADY;
10590                         goto out_err;
10591                 }
10592         }
10593         /* Add it to the list */
10594         nreg->nlportid = info->snd_portid;
10595         list_add(&nreg->list, &rdev->beacon_registrations);
10596
10597         spin_unlock_bh(&rdev->beacon_registrations_lock);
10598
10599         return 0;
10600 out_err:
10601         spin_unlock_bh(&rdev->beacon_registrations_lock);
10602         kfree(nreg);
10603         return rv;
10604 }
10605
10606 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10607 {
10608         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10609         struct wireless_dev *wdev = info->user_ptr[1];
10610         int err;
10611
10612         if (!rdev->ops->start_p2p_device)
10613                 return -EOPNOTSUPP;
10614
10615         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10616                 return -EOPNOTSUPP;
10617
10618         if (wdev_running(wdev))
10619                 return 0;
10620
10621         if (rfkill_blocked(rdev->rfkill))
10622                 return -ERFKILL;
10623
10624         err = rdev_start_p2p_device(rdev, wdev);
10625         if (err)
10626                 return err;
10627
10628         wdev->is_running = true;
10629         rdev->opencount++;
10630
10631         return 0;
10632 }
10633
10634 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10635 {
10636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10637         struct wireless_dev *wdev = info->user_ptr[1];
10638
10639         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10640                 return -EOPNOTSUPP;
10641
10642         if (!rdev->ops->stop_p2p_device)
10643                 return -EOPNOTSUPP;
10644
10645         cfg80211_stop_p2p_device(rdev, wdev);
10646
10647         return 0;
10648 }
10649
10650 static int nl80211_start_nan(struct sk_buff *skb, struct genl_info *info)
10651 {
10652         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10653         struct wireless_dev *wdev = info->user_ptr[1];
10654         struct cfg80211_nan_conf conf = {};
10655         int err;
10656
10657         if (wdev->iftype != NL80211_IFTYPE_NAN)
10658                 return -EOPNOTSUPP;
10659
10660         if (wdev_running(wdev))
10661                 return -EEXIST;
10662
10663         if (rfkill_blocked(rdev->rfkill))
10664                 return -ERFKILL;
10665
10666         if (!info->attrs[NL80211_ATTR_NAN_MASTER_PREF])
10667                 return -EINVAL;
10668
10669         if (!info->attrs[NL80211_ATTR_NAN_DUAL])
10670                 return -EINVAL;
10671
10672         conf.master_pref =
10673                 nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
10674         if (!conf.master_pref)
10675                 return -EINVAL;
10676
10677         conf.dual = nla_get_u8(info->attrs[NL80211_ATTR_NAN_DUAL]);
10678
10679         err = rdev_start_nan(rdev, wdev, &conf);
10680         if (err)
10681                 return err;
10682
10683         wdev->is_running = true;
10684         rdev->opencount++;
10685
10686         return 0;
10687 }
10688
10689 static int nl80211_stop_nan(struct sk_buff *skb, struct genl_info *info)
10690 {
10691         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10692         struct wireless_dev *wdev = info->user_ptr[1];
10693
10694         if (wdev->iftype != NL80211_IFTYPE_NAN)
10695                 return -EOPNOTSUPP;
10696
10697         cfg80211_stop_nan(rdev, wdev);
10698
10699         return 0;
10700 }
10701
10702 static int validate_nan_filter(struct nlattr *filter_attr)
10703 {
10704         struct nlattr *attr;
10705         int len = 0, n_entries = 0, rem;
10706
10707         nla_for_each_nested(attr, filter_attr, rem) {
10708                 len += nla_len(attr);
10709                 n_entries++;
10710         }
10711
10712         if (len >= U8_MAX)
10713                 return -EINVAL;
10714
10715         return n_entries;
10716 }
10717
10718 static int handle_nan_filter(struct nlattr *attr_filter,
10719                              struct cfg80211_nan_func *func,
10720                              bool tx)
10721 {
10722         struct nlattr *attr;
10723         int n_entries, rem, i;
10724         struct cfg80211_nan_func_filter *filter;
10725
10726         n_entries = validate_nan_filter(attr_filter);
10727         if (n_entries < 0)
10728                 return n_entries;
10729
10730         BUILD_BUG_ON(sizeof(*func->rx_filters) != sizeof(*func->tx_filters));
10731
10732         filter = kcalloc(n_entries, sizeof(*func->rx_filters), GFP_KERNEL);
10733         if (!filter)
10734                 return -ENOMEM;
10735
10736         i = 0;
10737         nla_for_each_nested(attr, attr_filter, rem) {
10738                 filter[i].filter = nla_memdup(attr, GFP_KERNEL);
10739                 filter[i].len = nla_len(attr);
10740                 i++;
10741         }
10742         if (tx) {
10743                 func->num_tx_filters = n_entries;
10744                 func->tx_filters = filter;
10745         } else {
10746                 func->num_rx_filters = n_entries;
10747                 func->rx_filters = filter;
10748         }
10749
10750         return 0;
10751 }
10752
10753 static int nl80211_nan_add_func(struct sk_buff *skb,
10754                                 struct genl_info *info)
10755 {
10756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10757         struct wireless_dev *wdev = info->user_ptr[1];
10758         struct nlattr *tb[NUM_NL80211_NAN_FUNC_ATTR], *func_attr;
10759         struct cfg80211_nan_func *func;
10760         struct sk_buff *msg = NULL;
10761         void *hdr = NULL;
10762         int err = 0;
10763
10764         if (wdev->iftype != NL80211_IFTYPE_NAN)
10765                 return -EOPNOTSUPP;
10766
10767         if (!wdev_running(wdev))
10768                 return -ENOTCONN;
10769
10770         if (!info->attrs[NL80211_ATTR_NAN_FUNC])
10771                 return -EINVAL;
10772
10773         if (wdev->owner_nlportid &&
10774             wdev->owner_nlportid != info->snd_portid)
10775                 return -ENOTCONN;
10776
10777         err = nla_parse_nested(tb, NL80211_NAN_FUNC_ATTR_MAX,
10778                                info->attrs[NL80211_ATTR_NAN_FUNC],
10779                                nl80211_nan_func_policy);
10780         if (err)
10781                 return err;
10782
10783         func = kzalloc(sizeof(*func), GFP_KERNEL);
10784         if (!func)
10785                 return -ENOMEM;
10786
10787         func->cookie = wdev->wiphy->cookie_counter++;
10788
10789         if (!tb[NL80211_NAN_FUNC_TYPE] ||
10790             nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]) > NL80211_NAN_FUNC_MAX_TYPE) {
10791                 err = -EINVAL;
10792                 goto out;
10793         }
10794
10795
10796         func->type = nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]);
10797
10798         if (!tb[NL80211_NAN_FUNC_SERVICE_ID]) {
10799                 err = -EINVAL;
10800                 goto out;
10801         }
10802
10803         memcpy(func->service_id, nla_data(tb[NL80211_NAN_FUNC_SERVICE_ID]),
10804                sizeof(func->service_id));
10805
10806         func->close_range =
10807                 nla_get_flag(tb[NL80211_NAN_FUNC_CLOSE_RANGE]);
10808
10809         if (tb[NL80211_NAN_FUNC_SERVICE_INFO]) {
10810                 func->serv_spec_info_len =
10811                         nla_len(tb[NL80211_NAN_FUNC_SERVICE_INFO]);
10812                 func->serv_spec_info =
10813                         kmemdup(nla_data(tb[NL80211_NAN_FUNC_SERVICE_INFO]),
10814                                 func->serv_spec_info_len,
10815                                 GFP_KERNEL);
10816                 if (!func->serv_spec_info) {
10817                         err = -ENOMEM;
10818                         goto out;
10819                 }
10820         }
10821
10822         if (tb[NL80211_NAN_FUNC_TTL])
10823                 func->ttl = nla_get_u32(tb[NL80211_NAN_FUNC_TTL]);
10824
10825         switch (func->type) {
10826         case NL80211_NAN_FUNC_PUBLISH:
10827                 if (!tb[NL80211_NAN_FUNC_PUBLISH_TYPE]) {
10828                         err = -EINVAL;
10829                         goto out;
10830                 }
10831
10832                 func->publish_type =
10833                         nla_get_u8(tb[NL80211_NAN_FUNC_PUBLISH_TYPE]);
10834                 func->publish_bcast =
10835                         nla_get_flag(tb[NL80211_NAN_FUNC_PUBLISH_BCAST]);
10836
10837                 if ((!(func->publish_type & NL80211_NAN_SOLICITED_PUBLISH)) &&
10838                         func->publish_bcast) {
10839                         err = -EINVAL;
10840                         goto out;
10841                 }
10842                 break;
10843         case NL80211_NAN_FUNC_SUBSCRIBE:
10844                 func->subscribe_active =
10845                         nla_get_flag(tb[NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE]);
10846                 break;
10847         case NL80211_NAN_FUNC_FOLLOW_UP:
10848                 if (!tb[NL80211_NAN_FUNC_FOLLOW_UP_ID] ||
10849                     !tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]) {
10850                         err = -EINVAL;
10851                         goto out;
10852                 }
10853
10854                 func->followup_id =
10855                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_ID]);
10856                 func->followup_reqid =
10857                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]);
10858                 memcpy(func->followup_dest.addr,
10859                        nla_data(tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]),
10860                        sizeof(func->followup_dest.addr));
10861                 if (func->ttl) {
10862                         err = -EINVAL;
10863                         goto out;
10864                 }
10865                 break;
10866         default:
10867                 err = -EINVAL;
10868                 goto out;
10869         }
10870
10871         if (tb[NL80211_NAN_FUNC_SRF]) {
10872                 struct nlattr *srf_tb[NUM_NL80211_NAN_SRF_ATTR];
10873
10874                 err = nla_parse_nested(srf_tb, NL80211_NAN_SRF_ATTR_MAX,
10875                                        tb[NL80211_NAN_FUNC_SRF],
10876                                        nl80211_nan_srf_policy);
10877                 if (err)
10878                         goto out;
10879
10880                 func->srf_include =
10881                         nla_get_flag(srf_tb[NL80211_NAN_SRF_INCLUDE]);
10882
10883                 if (srf_tb[NL80211_NAN_SRF_BF]) {
10884                         if (srf_tb[NL80211_NAN_SRF_MAC_ADDRS] ||
10885                             !srf_tb[NL80211_NAN_SRF_BF_IDX]) {
10886                                 err = -EINVAL;
10887                                 goto out;
10888                         }
10889
10890                         func->srf_bf_len =
10891                                 nla_len(srf_tb[NL80211_NAN_SRF_BF]);
10892                         func->srf_bf =
10893                                 kmemdup(nla_data(srf_tb[NL80211_NAN_SRF_BF]),
10894                                         func->srf_bf_len, GFP_KERNEL);
10895                         if (!func->srf_bf) {
10896                                 err = -ENOMEM;
10897                                 goto out;
10898                         }
10899
10900                         func->srf_bf_idx =
10901                                 nla_get_u8(srf_tb[NL80211_NAN_SRF_BF_IDX]);
10902                 } else {
10903                         struct nlattr *attr, *mac_attr =
10904                                 srf_tb[NL80211_NAN_SRF_MAC_ADDRS];
10905                         int n_entries, rem, i = 0;
10906
10907                         if (!mac_attr) {
10908                                 err = -EINVAL;
10909                                 goto out;
10910                         }
10911
10912                         n_entries = validate_acl_mac_addrs(mac_attr);
10913                         if (n_entries <= 0) {
10914                                 err = -EINVAL;
10915                                 goto out;
10916                         }
10917
10918                         func->srf_num_macs = n_entries;
10919                         func->srf_macs =
10920                                 kzalloc(sizeof(*func->srf_macs) * n_entries,
10921                                         GFP_KERNEL);
10922                         if (!func->srf_macs) {
10923                                 err = -ENOMEM;
10924                                 goto out;
10925                         }
10926
10927                         nla_for_each_nested(attr, mac_attr, rem)
10928                                 memcpy(func->srf_macs[i++].addr, nla_data(attr),
10929                                        sizeof(*func->srf_macs));
10930                 }
10931         }
10932
10933         if (tb[NL80211_NAN_FUNC_TX_MATCH_FILTER]) {
10934                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_TX_MATCH_FILTER],
10935                                         func, true);
10936                 if (err)
10937                         goto out;
10938         }
10939
10940         if (tb[NL80211_NAN_FUNC_RX_MATCH_FILTER]) {
10941                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_RX_MATCH_FILTER],
10942                                         func, false);
10943                 if (err)
10944                         goto out;
10945         }
10946
10947         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10948         if (!msg) {
10949                 err = -ENOMEM;
10950                 goto out;
10951         }
10952
10953         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10954                              NL80211_CMD_ADD_NAN_FUNCTION);
10955         /* This can't really happen - we just allocated 4KB */
10956         if (WARN_ON(!hdr)) {
10957                 err = -ENOMEM;
10958                 goto out;
10959         }
10960
10961         err = rdev_add_nan_func(rdev, wdev, func);
10962 out:
10963         if (err < 0) {
10964                 cfg80211_free_nan_func(func);
10965                 nlmsg_free(msg);
10966                 return err;
10967         }
10968
10969         /* propagate the instance id and cookie to userspace  */
10970         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, func->cookie,
10971                               NL80211_ATTR_PAD))
10972                 goto nla_put_failure;
10973
10974         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
10975         if (!func_attr)
10976                 goto nla_put_failure;
10977
10978         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID,
10979                        func->instance_id))
10980                 goto nla_put_failure;
10981
10982         nla_nest_end(msg, func_attr);
10983
10984         genlmsg_end(msg, hdr);
10985         return genlmsg_reply(msg, info);
10986
10987 nla_put_failure:
10988         nlmsg_free(msg);
10989         return -ENOBUFS;
10990 }
10991
10992 static int nl80211_nan_del_func(struct sk_buff *skb,
10993                                struct genl_info *info)
10994 {
10995         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10996         struct wireless_dev *wdev = info->user_ptr[1];
10997         u64 cookie;
10998
10999         if (wdev->iftype != NL80211_IFTYPE_NAN)
11000                 return -EOPNOTSUPP;
11001
11002         if (!wdev_running(wdev))
11003                 return -ENOTCONN;
11004
11005         if (!info->attrs[NL80211_ATTR_COOKIE])
11006                 return -EINVAL;
11007
11008         if (wdev->owner_nlportid &&
11009             wdev->owner_nlportid != info->snd_portid)
11010                 return -ENOTCONN;
11011
11012         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
11013
11014         rdev_del_nan_func(rdev, wdev, cookie);
11015
11016         return 0;
11017 }
11018
11019 static int nl80211_nan_change_config(struct sk_buff *skb,
11020                                      struct genl_info *info)
11021 {
11022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11023         struct wireless_dev *wdev = info->user_ptr[1];
11024         struct cfg80211_nan_conf conf = {};
11025         u32 changed = 0;
11026
11027         if (wdev->iftype != NL80211_IFTYPE_NAN)
11028                 return -EOPNOTSUPP;
11029
11030         if (!wdev_running(wdev))
11031                 return -ENOTCONN;
11032
11033         if (info->attrs[NL80211_ATTR_NAN_MASTER_PREF]) {
11034                 conf.master_pref =
11035                         nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
11036                 if (conf.master_pref <= 1 || conf.master_pref == 255)
11037                         return -EINVAL;
11038
11039                 changed |= CFG80211_NAN_CONF_CHANGED_PREF;
11040         }
11041
11042         if (info->attrs[NL80211_ATTR_NAN_DUAL]) {
11043                 conf.dual = nla_get_u8(info->attrs[NL80211_ATTR_NAN_DUAL]);
11044                 changed |= CFG80211_NAN_CONF_CHANGED_DUAL;
11045         }
11046
11047         if (!changed)
11048                 return -EINVAL;
11049
11050         return rdev_nan_change_conf(rdev, wdev, &conf, changed);
11051 }
11052
11053 void cfg80211_nan_match(struct wireless_dev *wdev,
11054                         struct cfg80211_nan_match_params *match, gfp_t gfp)
11055 {
11056         struct wiphy *wiphy = wdev->wiphy;
11057         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11058         struct nlattr *match_attr, *local_func_attr, *peer_func_attr;
11059         struct sk_buff *msg;
11060         void *hdr;
11061
11062         if (WARN_ON(!match->inst_id || !match->peer_inst_id || !match->addr))
11063                 return;
11064
11065         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11066         if (!msg)
11067                 return;
11068
11069         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NAN_MATCH);
11070         if (!hdr) {
11071                 nlmsg_free(msg);
11072                 return;
11073         }
11074
11075         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11076             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11077                                          wdev->netdev->ifindex)) ||
11078             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11079                               NL80211_ATTR_PAD))
11080                 goto nla_put_failure;
11081
11082         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, match->cookie,
11083                               NL80211_ATTR_PAD) ||
11084             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, match->addr))
11085                 goto nla_put_failure;
11086
11087         match_attr = nla_nest_start(msg, NL80211_ATTR_NAN_MATCH);
11088         if (!match_attr)
11089                 goto nla_put_failure;
11090
11091         local_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_LOCAL);
11092         if (!local_func_attr)
11093                 goto nla_put_failure;
11094
11095         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->inst_id))
11096                 goto nla_put_failure;
11097
11098         nla_nest_end(msg, local_func_attr);
11099
11100         peer_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_PEER);
11101         if (!peer_func_attr)
11102                 goto nla_put_failure;
11103
11104         if (nla_put_u8(msg, NL80211_NAN_FUNC_TYPE, match->type) ||
11105             nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->peer_inst_id))
11106                 goto nla_put_failure;
11107
11108         if (match->info && match->info_len &&
11109             nla_put(msg, NL80211_NAN_FUNC_SERVICE_INFO, match->info_len,
11110                     match->info))
11111                 goto nla_put_failure;
11112
11113         nla_nest_end(msg, peer_func_attr);
11114         nla_nest_end(msg, match_attr);
11115         genlmsg_end(msg, hdr);
11116
11117         if (!wdev->owner_nlportid)
11118                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11119                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11120         else
11121                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11122                                 wdev->owner_nlportid);
11123
11124         return;
11125
11126 nla_put_failure:
11127         nlmsg_free(msg);
11128 }
11129 EXPORT_SYMBOL(cfg80211_nan_match);
11130
11131 void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
11132                                   u8 inst_id,
11133                                   enum nl80211_nan_func_term_reason reason,
11134                                   u64 cookie, gfp_t gfp)
11135 {
11136         struct wiphy *wiphy = wdev->wiphy;
11137         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11138         struct sk_buff *msg;
11139         struct nlattr *func_attr;
11140         void *hdr;
11141
11142         if (WARN_ON(!inst_id))
11143                 return;
11144
11145         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11146         if (!msg)
11147                 return;
11148
11149         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_NAN_FUNCTION);
11150         if (!hdr) {
11151                 nlmsg_free(msg);
11152                 return;
11153         }
11154
11155         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11156             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11157                                          wdev->netdev->ifindex)) ||
11158             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11159                               NL80211_ATTR_PAD))
11160                 goto nla_put_failure;
11161
11162         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
11163                               NL80211_ATTR_PAD))
11164                 goto nla_put_failure;
11165
11166         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
11167         if (!func_attr)
11168                 goto nla_put_failure;
11169
11170         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, inst_id) ||
11171             nla_put_u8(msg, NL80211_NAN_FUNC_TERM_REASON, reason))
11172                 goto nla_put_failure;
11173
11174         nla_nest_end(msg, func_attr);
11175         genlmsg_end(msg, hdr);
11176
11177         if (!wdev->owner_nlportid)
11178                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11179                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11180         else
11181                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11182                                 wdev->owner_nlportid);
11183
11184         return;
11185
11186 nla_put_failure:
11187         nlmsg_free(msg);
11188 }
11189 EXPORT_SYMBOL(cfg80211_nan_func_terminated);
11190
11191 static int nl80211_get_protocol_features(struct sk_buff *skb,
11192                                          struct genl_info *info)
11193 {
11194         void *hdr;
11195         struct sk_buff *msg;
11196
11197         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11198         if (!msg)
11199                 return -ENOMEM;
11200
11201         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11202                              NL80211_CMD_GET_PROTOCOL_FEATURES);
11203         if (!hdr)
11204                 goto nla_put_failure;
11205
11206         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
11207                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
11208                 goto nla_put_failure;
11209
11210         genlmsg_end(msg, hdr);
11211         return genlmsg_reply(msg, info);
11212
11213  nla_put_failure:
11214         kfree_skb(msg);
11215         return -ENOBUFS;
11216 }
11217
11218 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
11219 {
11220         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11221         struct cfg80211_update_ft_ies_params ft_params;
11222         struct net_device *dev = info->user_ptr[1];
11223
11224         if (!rdev->ops->update_ft_ies)
11225                 return -EOPNOTSUPP;
11226
11227         if (!info->attrs[NL80211_ATTR_MDID] ||
11228             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
11229                 return -EINVAL;
11230
11231         memset(&ft_params, 0, sizeof(ft_params));
11232         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
11233         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
11234         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
11235
11236         return rdev_update_ft_ies(rdev, dev, &ft_params);
11237 }
11238
11239 static int nl80211_crit_protocol_start(struct sk_buff *skb,
11240                                        struct genl_info *info)
11241 {
11242         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11243         struct wireless_dev *wdev = info->user_ptr[1];
11244         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
11245         u16 duration;
11246         int ret;
11247
11248         if (!rdev->ops->crit_proto_start)
11249                 return -EOPNOTSUPP;
11250
11251         if (WARN_ON(!rdev->ops->crit_proto_stop))
11252                 return -EINVAL;
11253
11254         if (rdev->crit_proto_nlportid)
11255                 return -EBUSY;
11256
11257         /* determine protocol if provided */
11258         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
11259                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
11260
11261         if (proto >= NUM_NL80211_CRIT_PROTO)
11262                 return -EINVAL;
11263
11264         /* timeout must be provided */
11265         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
11266                 return -EINVAL;
11267
11268         duration =
11269                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
11270
11271         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
11272                 return -ERANGE;
11273
11274         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
11275         if (!ret)
11276                 rdev->crit_proto_nlportid = info->snd_portid;
11277
11278         return ret;
11279 }
11280
11281 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
11282                                       struct genl_info *info)
11283 {
11284         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11285         struct wireless_dev *wdev = info->user_ptr[1];
11286
11287         if (!rdev->ops->crit_proto_stop)
11288                 return -EOPNOTSUPP;
11289
11290         if (rdev->crit_proto_nlportid) {
11291                 rdev->crit_proto_nlportid = 0;
11292                 rdev_crit_proto_stop(rdev, wdev);
11293         }
11294         return 0;
11295 }
11296
11297 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
11298 {
11299         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11300         struct wireless_dev *wdev =
11301                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
11302         int i, err;
11303         u32 vid, subcmd;
11304
11305         if (!rdev->wiphy.vendor_commands)
11306                 return -EOPNOTSUPP;
11307
11308         if (IS_ERR(wdev)) {
11309                 err = PTR_ERR(wdev);
11310                 if (err != -EINVAL)
11311                         return err;
11312                 wdev = NULL;
11313         } else if (wdev->wiphy != &rdev->wiphy) {
11314                 return -EINVAL;
11315         }
11316
11317         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
11318             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
11319                 return -EINVAL;
11320
11321         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
11322         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
11323         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
11324                 const struct wiphy_vendor_command *vcmd;
11325                 void *data = NULL;
11326                 int len = 0;
11327
11328                 vcmd = &rdev->wiphy.vendor_commands[i];
11329
11330                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
11331                         continue;
11332
11333                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
11334                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
11335                         if (!wdev)
11336                                 return -EINVAL;
11337                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
11338                             !wdev->netdev)
11339                                 return -EINVAL;
11340
11341                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
11342                                 if (!wdev_running(wdev))
11343                                         return -ENETDOWN;
11344                         }
11345
11346                         if (!vcmd->doit)
11347                                 return -EOPNOTSUPP;
11348                 } else {
11349                         wdev = NULL;
11350                 }
11351
11352                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
11353                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11354                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11355                 }
11356
11357                 rdev->cur_cmd_info = info;
11358                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
11359                                                           data, len);
11360                 rdev->cur_cmd_info = NULL;
11361                 return err;
11362         }
11363
11364         return -EOPNOTSUPP;
11365 }
11366
11367 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
11368                                        struct netlink_callback *cb,
11369                                        struct cfg80211_registered_device **rdev,
11370                                        struct wireless_dev **wdev)
11371 {
11372         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
11373         u32 vid, subcmd;
11374         unsigned int i;
11375         int vcmd_idx = -1;
11376         int err;
11377         void *data = NULL;
11378         unsigned int data_len = 0;
11379
11380         rtnl_lock();
11381
11382         if (cb->args[0]) {
11383                 /* subtract the 1 again here */
11384                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
11385                 struct wireless_dev *tmp;
11386
11387                 if (!wiphy) {
11388                         err = -ENODEV;
11389                         goto out_unlock;
11390                 }
11391                 *rdev = wiphy_to_rdev(wiphy);
11392                 *wdev = NULL;
11393
11394                 if (cb->args[1]) {
11395                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
11396                                 if (tmp->identifier == cb->args[1] - 1) {
11397                                         *wdev = tmp;
11398                                         break;
11399                                 }
11400                         }
11401                 }
11402
11403                 /* keep rtnl locked in successful case */
11404                 return 0;
11405         }
11406
11407         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
11408                           attrbuf, nl80211_fam.maxattr, nl80211_policy);
11409         if (err)
11410                 goto out_unlock;
11411
11412         if (!attrbuf[NL80211_ATTR_VENDOR_ID] ||
11413             !attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
11414                 err = -EINVAL;
11415                 goto out_unlock;
11416         }
11417
11418         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk), attrbuf);
11419         if (IS_ERR(*wdev))
11420                 *wdev = NULL;
11421
11422         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
11423         if (IS_ERR(*rdev)) {
11424                 err = PTR_ERR(*rdev);
11425                 goto out_unlock;
11426         }
11427
11428         vid = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_ID]);
11429         subcmd = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
11430
11431         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
11432                 const struct wiphy_vendor_command *vcmd;
11433
11434                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
11435
11436                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
11437                         continue;
11438
11439                 if (!vcmd->dumpit) {
11440                         err = -EOPNOTSUPP;
11441                         goto out_unlock;
11442                 }
11443
11444                 vcmd_idx = i;
11445                 break;
11446         }
11447
11448         if (vcmd_idx < 0) {
11449                 err = -EOPNOTSUPP;
11450                 goto out_unlock;
11451         }
11452
11453         if (attrbuf[NL80211_ATTR_VENDOR_DATA]) {
11454                 data = nla_data(attrbuf[NL80211_ATTR_VENDOR_DATA]);
11455                 data_len = nla_len(attrbuf[NL80211_ATTR_VENDOR_DATA]);
11456         }
11457
11458         /* 0 is the first index - add 1 to parse only once */
11459         cb->args[0] = (*rdev)->wiphy_idx + 1;
11460         /* add 1 to know if it was NULL */
11461         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
11462         cb->args[2] = vcmd_idx;
11463         cb->args[3] = (unsigned long)data;
11464         cb->args[4] = data_len;
11465
11466         /* keep rtnl locked in successful case */
11467         return 0;
11468  out_unlock:
11469         rtnl_unlock();
11470         return err;
11471 }
11472
11473 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
11474                                    struct netlink_callback *cb)
11475 {
11476         struct cfg80211_registered_device *rdev;
11477         struct wireless_dev *wdev;
11478         unsigned int vcmd_idx;
11479         const struct wiphy_vendor_command *vcmd;
11480         void *data;
11481         int data_len;
11482         int err;
11483         struct nlattr *vendor_data;
11484
11485         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
11486         if (err)
11487                 return err;
11488
11489         vcmd_idx = cb->args[2];
11490         data = (void *)cb->args[3];
11491         data_len = cb->args[4];
11492         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
11493
11494         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
11495                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
11496                 if (!wdev)
11497                         return -EINVAL;
11498                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
11499                     !wdev->netdev)
11500                         return -EINVAL;
11501
11502                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
11503                         if (!wdev_running(wdev))
11504                                 return -ENETDOWN;
11505                 }
11506         }
11507
11508         while (1) {
11509                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
11510                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
11511                                            NL80211_CMD_VENDOR);
11512                 if (!hdr)
11513                         break;
11514
11515                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11516                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
11517                                                wdev_id(wdev),
11518                                                NL80211_ATTR_PAD))) {
11519                         genlmsg_cancel(skb, hdr);
11520                         break;
11521                 }
11522
11523                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
11524                 if (!vendor_data) {
11525                         genlmsg_cancel(skb, hdr);
11526                         break;
11527                 }
11528
11529                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
11530                                    (unsigned long *)&cb->args[5]);
11531                 nla_nest_end(skb, vendor_data);
11532
11533                 if (err == -ENOBUFS || err == -ENOENT) {
11534                         genlmsg_cancel(skb, hdr);
11535                         break;
11536                 } else if (err) {
11537                         genlmsg_cancel(skb, hdr);
11538                         goto out;
11539                 }
11540
11541                 genlmsg_end(skb, hdr);
11542         }
11543
11544         err = skb->len;
11545  out:
11546         rtnl_unlock();
11547         return err;
11548 }
11549
11550 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
11551                                            enum nl80211_commands cmd,
11552                                            enum nl80211_attrs attr,
11553                                            int approxlen)
11554 {
11555         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11556
11557         if (WARN_ON(!rdev->cur_cmd_info))
11558                 return NULL;
11559
11560         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
11561                                            rdev->cur_cmd_info->snd_portid,
11562                                            rdev->cur_cmd_info->snd_seq,
11563                                            cmd, attr, NULL, GFP_KERNEL);
11564 }
11565 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
11566
11567 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
11568 {
11569         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
11570         void *hdr = ((void **)skb->cb)[1];
11571         struct nlattr *data = ((void **)skb->cb)[2];
11572
11573         /* clear CB data for netlink core to own from now on */
11574         memset(skb->cb, 0, sizeof(skb->cb));
11575
11576         if (WARN_ON(!rdev->cur_cmd_info)) {
11577                 kfree_skb(skb);
11578                 return -EINVAL;
11579         }
11580
11581         nla_nest_end(skb, data);
11582         genlmsg_end(skb, hdr);
11583         return genlmsg_reply(skb, rdev->cur_cmd_info);
11584 }
11585 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
11586
11587 static int nl80211_set_qos_map(struct sk_buff *skb,
11588                                struct genl_info *info)
11589 {
11590         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11591         struct cfg80211_qos_map *qos_map = NULL;
11592         struct net_device *dev = info->user_ptr[1];
11593         u8 *pos, len, num_des, des_len, des;
11594         int ret;
11595
11596         if (!rdev->ops->set_qos_map)
11597                 return -EOPNOTSUPP;
11598
11599         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
11600                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
11601                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
11602
11603                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
11604                     len > IEEE80211_QOS_MAP_LEN_MAX)
11605                         return -EINVAL;
11606
11607                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
11608                 if (!qos_map)
11609                         return -ENOMEM;
11610
11611                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
11612                 if (num_des) {
11613                         des_len = num_des *
11614                                 sizeof(struct cfg80211_dscp_exception);
11615                         memcpy(qos_map->dscp_exception, pos, des_len);
11616                         qos_map->num_des = num_des;
11617                         for (des = 0; des < num_des; des++) {
11618                                 if (qos_map->dscp_exception[des].up > 7) {
11619                                         kfree(qos_map);
11620                                         return -EINVAL;
11621                                 }
11622                         }
11623                         pos += des_len;
11624                 }
11625                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
11626         }
11627
11628         wdev_lock(dev->ieee80211_ptr);
11629         ret = nl80211_key_allowed(dev->ieee80211_ptr);
11630         if (!ret)
11631                 ret = rdev_set_qos_map(rdev, dev, qos_map);
11632         wdev_unlock(dev->ieee80211_ptr);
11633
11634         kfree(qos_map);
11635         return ret;
11636 }
11637
11638 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
11639 {
11640         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11641         struct net_device *dev = info->user_ptr[1];
11642         struct wireless_dev *wdev = dev->ieee80211_ptr;
11643         const u8 *peer;
11644         u8 tsid, up;
11645         u16 admitted_time = 0;
11646         int err;
11647
11648         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
11649                 return -EOPNOTSUPP;
11650
11651         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
11652             !info->attrs[NL80211_ATTR_USER_PRIO])
11653                 return -EINVAL;
11654
11655         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
11656         if (tsid >= IEEE80211_NUM_TIDS)
11657                 return -EINVAL;
11658
11659         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
11660         if (up >= IEEE80211_NUM_UPS)
11661                 return -EINVAL;
11662
11663         /* WMM uses TIDs 0-7 even for TSPEC */
11664         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
11665                 /* TODO: handle 802.11 TSPEC/admission control
11666                  * need more attributes for that (e.g. BA session requirement);
11667                  * change the WMM adminssion test above to allow both then
11668                  */
11669                 return -EINVAL;
11670         }
11671
11672         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
11673
11674         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
11675                 admitted_time =
11676                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
11677                 if (!admitted_time)
11678                         return -EINVAL;
11679         }
11680
11681         wdev_lock(wdev);
11682         switch (wdev->iftype) {
11683         case NL80211_IFTYPE_STATION:
11684         case NL80211_IFTYPE_P2P_CLIENT:
11685                 if (wdev->current_bss)
11686                         break;
11687                 err = -ENOTCONN;
11688                 goto out;
11689         default:
11690                 err = -EOPNOTSUPP;
11691                 goto out;
11692         }
11693
11694         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
11695
11696  out:
11697         wdev_unlock(wdev);
11698         return err;
11699 }
11700
11701 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
11702 {
11703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11704         struct net_device *dev = info->user_ptr[1];
11705         struct wireless_dev *wdev = dev->ieee80211_ptr;
11706         const u8 *peer;
11707         u8 tsid;
11708         int err;
11709
11710         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
11711                 return -EINVAL;
11712
11713         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
11714         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
11715
11716         wdev_lock(wdev);
11717         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
11718         wdev_unlock(wdev);
11719
11720         return err;
11721 }
11722
11723 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
11724                                        struct genl_info *info)
11725 {
11726         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11727         struct net_device *dev = info->user_ptr[1];
11728         struct wireless_dev *wdev = dev->ieee80211_ptr;
11729         struct cfg80211_chan_def chandef = {};
11730         const u8 *addr;
11731         u8 oper_class;
11732         int err;
11733
11734         if (!rdev->ops->tdls_channel_switch ||
11735             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
11736                 return -EOPNOTSUPP;
11737
11738         switch (dev->ieee80211_ptr->iftype) {
11739         case NL80211_IFTYPE_STATION:
11740         case NL80211_IFTYPE_P2P_CLIENT:
11741                 break;
11742         default:
11743                 return -EOPNOTSUPP;
11744         }
11745
11746         if (!info->attrs[NL80211_ATTR_MAC] ||
11747             !info->attrs[NL80211_ATTR_OPER_CLASS])
11748                 return -EINVAL;
11749
11750         err = nl80211_parse_chandef(rdev, info, &chandef);
11751         if (err)
11752                 return err;
11753
11754         /*
11755          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
11756          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
11757          * specification is not defined for them.
11758          */
11759         if (chandef.chan->band == NL80211_BAND_2GHZ &&
11760             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
11761             chandef.width != NL80211_CHAN_WIDTH_20)
11762                 return -EINVAL;
11763
11764         /* we will be active on the TDLS link */
11765         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
11766                                            wdev->iftype))
11767                 return -EINVAL;
11768
11769         /* don't allow switching to DFS channels */
11770         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
11771                 return -EINVAL;
11772
11773         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11774         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
11775
11776         wdev_lock(wdev);
11777         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
11778         wdev_unlock(wdev);
11779
11780         return err;
11781 }
11782
11783 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
11784                                               struct genl_info *info)
11785 {
11786         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11787         struct net_device *dev = info->user_ptr[1];
11788         struct wireless_dev *wdev = dev->ieee80211_ptr;
11789         const u8 *addr;
11790
11791         if (!rdev->ops->tdls_channel_switch ||
11792             !rdev->ops->tdls_cancel_channel_switch ||
11793             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
11794                 return -EOPNOTSUPP;
11795
11796         switch (dev->ieee80211_ptr->iftype) {
11797         case NL80211_IFTYPE_STATION:
11798         case NL80211_IFTYPE_P2P_CLIENT:
11799                 break;
11800         default:
11801                 return -EOPNOTSUPP;
11802         }
11803
11804         if (!info->attrs[NL80211_ATTR_MAC])
11805                 return -EINVAL;
11806
11807         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11808
11809         wdev_lock(wdev);
11810         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
11811         wdev_unlock(wdev);
11812
11813         return 0;
11814 }
11815
11816 static int nl80211_set_multicast_to_unicast(struct sk_buff *skb,
11817                                             struct genl_info *info)
11818 {
11819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11820         struct net_device *dev = info->user_ptr[1];
11821         struct wireless_dev *wdev = dev->ieee80211_ptr;
11822         const struct nlattr *nla;
11823         bool enabled;
11824
11825         if (netif_running(dev))
11826                 return -EBUSY;
11827
11828         if (!rdev->ops->set_multicast_to_unicast)
11829                 return -EOPNOTSUPP;
11830
11831         if (wdev->iftype != NL80211_IFTYPE_AP &&
11832             wdev->iftype != NL80211_IFTYPE_P2P_GO)
11833                 return -EOPNOTSUPP;
11834
11835         nla = info->attrs[NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED];
11836         enabled = nla_get_flag(nla);
11837
11838         return rdev_set_multicast_to_unicast(rdev, dev, enabled);
11839 }
11840
11841 #define NL80211_FLAG_NEED_WIPHY         0x01
11842 #define NL80211_FLAG_NEED_NETDEV        0x02
11843 #define NL80211_FLAG_NEED_RTNL          0x04
11844 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
11845 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
11846                                          NL80211_FLAG_CHECK_NETDEV_UP)
11847 #define NL80211_FLAG_NEED_WDEV          0x10
11848 /* If a netdev is associated, it must be UP, P2P must be started */
11849 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
11850                                          NL80211_FLAG_CHECK_NETDEV_UP)
11851 #define NL80211_FLAG_CLEAR_SKB          0x20
11852
11853 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
11854                             struct genl_info *info)
11855 {
11856         struct cfg80211_registered_device *rdev;
11857         struct wireless_dev *wdev;
11858         struct net_device *dev;
11859         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
11860
11861         if (rtnl)
11862                 rtnl_lock();
11863
11864         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
11865                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
11866                 if (IS_ERR(rdev)) {
11867                         if (rtnl)
11868                                 rtnl_unlock();
11869                         return PTR_ERR(rdev);
11870                 }
11871                 info->user_ptr[0] = rdev;
11872         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
11873                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11874                 ASSERT_RTNL();
11875
11876                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
11877                                                   info->attrs);
11878                 if (IS_ERR(wdev)) {
11879                         if (rtnl)
11880                                 rtnl_unlock();
11881                         return PTR_ERR(wdev);
11882                 }
11883
11884                 dev = wdev->netdev;
11885                 rdev = wiphy_to_rdev(wdev->wiphy);
11886
11887                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
11888                         if (!dev) {
11889                                 if (rtnl)
11890                                         rtnl_unlock();
11891                                 return -EINVAL;
11892                         }
11893
11894                         info->user_ptr[1] = dev;
11895                 } else {
11896                         info->user_ptr[1] = wdev;
11897                 }
11898
11899                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
11900                     !wdev_running(wdev)) {
11901                         if (rtnl)
11902                                 rtnl_unlock();
11903                         return -ENETDOWN;
11904                 }
11905
11906                 if (dev)
11907                         dev_hold(dev);
11908
11909                 info->user_ptr[0] = rdev;
11910         }
11911
11912         return 0;
11913 }
11914
11915 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
11916                               struct genl_info *info)
11917 {
11918         if (info->user_ptr[1]) {
11919                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11920                         struct wireless_dev *wdev = info->user_ptr[1];
11921
11922                         if (wdev->netdev)
11923                                 dev_put(wdev->netdev);
11924                 } else {
11925                         dev_put(info->user_ptr[1]);
11926                 }
11927         }
11928
11929         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
11930                 rtnl_unlock();
11931
11932         /* If needed, clear the netlink message payload from the SKB
11933          * as it might contain key data that shouldn't stick around on
11934          * the heap after the SKB is freed. The netlink message header
11935          * is still needed for further processing, so leave it intact.
11936          */
11937         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
11938                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
11939
11940                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
11941         }
11942 }
11943
11944 static const struct genl_ops nl80211_ops[] = {
11945         {
11946                 .cmd = NL80211_CMD_GET_WIPHY,
11947                 .doit = nl80211_get_wiphy,
11948                 .dumpit = nl80211_dump_wiphy,
11949                 .done = nl80211_dump_wiphy_done,
11950                 .policy = nl80211_policy,
11951                 /* can be retrieved by unprivileged users */
11952                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11953                                   NL80211_FLAG_NEED_RTNL,
11954         },
11955         {
11956                 .cmd = NL80211_CMD_SET_WIPHY,
11957                 .doit = nl80211_set_wiphy,
11958                 .policy = nl80211_policy,
11959                 .flags = GENL_UNS_ADMIN_PERM,
11960                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11961         },
11962         {
11963                 .cmd = NL80211_CMD_GET_INTERFACE,
11964                 .doit = nl80211_get_interface,
11965                 .dumpit = nl80211_dump_interface,
11966                 .policy = nl80211_policy,
11967                 /* can be retrieved by unprivileged users */
11968                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11969                                   NL80211_FLAG_NEED_RTNL,
11970         },
11971         {
11972                 .cmd = NL80211_CMD_SET_INTERFACE,
11973                 .doit = nl80211_set_interface,
11974                 .policy = nl80211_policy,
11975                 .flags = GENL_UNS_ADMIN_PERM,
11976                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11977                                   NL80211_FLAG_NEED_RTNL,
11978         },
11979         {
11980                 .cmd = NL80211_CMD_NEW_INTERFACE,
11981                 .doit = nl80211_new_interface,
11982                 .policy = nl80211_policy,
11983                 .flags = GENL_UNS_ADMIN_PERM,
11984                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11985                                   NL80211_FLAG_NEED_RTNL,
11986         },
11987         {
11988                 .cmd = NL80211_CMD_DEL_INTERFACE,
11989                 .doit = nl80211_del_interface,
11990                 .policy = nl80211_policy,
11991                 .flags = GENL_UNS_ADMIN_PERM,
11992                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11993                                   NL80211_FLAG_NEED_RTNL,
11994         },
11995         {
11996                 .cmd = NL80211_CMD_GET_KEY,
11997                 .doit = nl80211_get_key,
11998                 .policy = nl80211_policy,
11999                 .flags = GENL_UNS_ADMIN_PERM,
12000                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12001                                   NL80211_FLAG_NEED_RTNL,
12002         },
12003         {
12004                 .cmd = NL80211_CMD_SET_KEY,
12005                 .doit = nl80211_set_key,
12006                 .policy = nl80211_policy,
12007                 .flags = GENL_UNS_ADMIN_PERM,
12008                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12009                                   NL80211_FLAG_NEED_RTNL |
12010                                   NL80211_FLAG_CLEAR_SKB,
12011         },
12012         {
12013                 .cmd = NL80211_CMD_NEW_KEY,
12014                 .doit = nl80211_new_key,
12015                 .policy = nl80211_policy,
12016                 .flags = GENL_UNS_ADMIN_PERM,
12017                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12018                                   NL80211_FLAG_NEED_RTNL |
12019                                   NL80211_FLAG_CLEAR_SKB,
12020         },
12021         {
12022                 .cmd = NL80211_CMD_DEL_KEY,
12023                 .doit = nl80211_del_key,
12024                 .policy = nl80211_policy,
12025                 .flags = GENL_UNS_ADMIN_PERM,
12026                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12027                                   NL80211_FLAG_NEED_RTNL,
12028         },
12029         {
12030                 .cmd = NL80211_CMD_SET_BEACON,
12031                 .policy = nl80211_policy,
12032                 .flags = GENL_UNS_ADMIN_PERM,
12033                 .doit = nl80211_set_beacon,
12034                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12035                                   NL80211_FLAG_NEED_RTNL,
12036         },
12037         {
12038                 .cmd = NL80211_CMD_START_AP,
12039                 .policy = nl80211_policy,
12040                 .flags = GENL_UNS_ADMIN_PERM,
12041                 .doit = nl80211_start_ap,
12042                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12043                                   NL80211_FLAG_NEED_RTNL,
12044         },
12045         {
12046                 .cmd = NL80211_CMD_STOP_AP,
12047                 .policy = nl80211_policy,
12048                 .flags = GENL_UNS_ADMIN_PERM,
12049                 .doit = nl80211_stop_ap,
12050                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12051                                   NL80211_FLAG_NEED_RTNL,
12052         },
12053         {
12054                 .cmd = NL80211_CMD_GET_STATION,
12055                 .doit = nl80211_get_station,
12056                 .dumpit = nl80211_dump_station,
12057                 .policy = nl80211_policy,
12058                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12059                                   NL80211_FLAG_NEED_RTNL,
12060         },
12061         {
12062                 .cmd = NL80211_CMD_SET_STATION,
12063                 .doit = nl80211_set_station,
12064                 .policy = nl80211_policy,
12065                 .flags = GENL_UNS_ADMIN_PERM,
12066                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12067                                   NL80211_FLAG_NEED_RTNL,
12068         },
12069         {
12070                 .cmd = NL80211_CMD_NEW_STATION,
12071                 .doit = nl80211_new_station,
12072                 .policy = nl80211_policy,
12073                 .flags = GENL_UNS_ADMIN_PERM,
12074                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12075                                   NL80211_FLAG_NEED_RTNL,
12076         },
12077         {
12078                 .cmd = NL80211_CMD_DEL_STATION,
12079                 .doit = nl80211_del_station,
12080                 .policy = nl80211_policy,
12081                 .flags = GENL_UNS_ADMIN_PERM,
12082                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12083                                   NL80211_FLAG_NEED_RTNL,
12084         },
12085         {
12086                 .cmd = NL80211_CMD_GET_MPATH,
12087                 .doit = nl80211_get_mpath,
12088                 .dumpit = nl80211_dump_mpath,
12089                 .policy = nl80211_policy,
12090                 .flags = GENL_UNS_ADMIN_PERM,
12091                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12092                                   NL80211_FLAG_NEED_RTNL,
12093         },
12094         {
12095                 .cmd = NL80211_CMD_GET_MPP,
12096                 .doit = nl80211_get_mpp,
12097                 .dumpit = nl80211_dump_mpp,
12098                 .policy = nl80211_policy,
12099                 .flags = GENL_UNS_ADMIN_PERM,
12100                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12101                                   NL80211_FLAG_NEED_RTNL,
12102         },
12103         {
12104                 .cmd = NL80211_CMD_SET_MPATH,
12105                 .doit = nl80211_set_mpath,
12106                 .policy = nl80211_policy,
12107                 .flags = GENL_UNS_ADMIN_PERM,
12108                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12109                                   NL80211_FLAG_NEED_RTNL,
12110         },
12111         {
12112                 .cmd = NL80211_CMD_NEW_MPATH,
12113                 .doit = nl80211_new_mpath,
12114                 .policy = nl80211_policy,
12115                 .flags = GENL_UNS_ADMIN_PERM,
12116                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12117                                   NL80211_FLAG_NEED_RTNL,
12118         },
12119         {
12120                 .cmd = NL80211_CMD_DEL_MPATH,
12121                 .doit = nl80211_del_mpath,
12122                 .policy = nl80211_policy,
12123                 .flags = GENL_UNS_ADMIN_PERM,
12124                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12125                                   NL80211_FLAG_NEED_RTNL,
12126         },
12127         {
12128                 .cmd = NL80211_CMD_SET_BSS,
12129                 .doit = nl80211_set_bss,
12130                 .policy = nl80211_policy,
12131                 .flags = GENL_UNS_ADMIN_PERM,
12132                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12133                                   NL80211_FLAG_NEED_RTNL,
12134         },
12135         {
12136                 .cmd = NL80211_CMD_GET_REG,
12137                 .doit = nl80211_get_reg_do,
12138                 .dumpit = nl80211_get_reg_dump,
12139                 .policy = nl80211_policy,
12140                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12141                 /* can be retrieved by unprivileged users */
12142         },
12143 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
12144         {
12145                 .cmd = NL80211_CMD_SET_REG,
12146                 .doit = nl80211_set_reg,
12147                 .policy = nl80211_policy,
12148                 .flags = GENL_ADMIN_PERM,
12149                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12150         },
12151 #endif
12152         {
12153                 .cmd = NL80211_CMD_REQ_SET_REG,
12154                 .doit = nl80211_req_set_reg,
12155                 .policy = nl80211_policy,
12156                 .flags = GENL_ADMIN_PERM,
12157         },
12158         {
12159                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
12160                 .doit = nl80211_get_mesh_config,
12161                 .policy = nl80211_policy,
12162                 /* can be retrieved by unprivileged users */
12163                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12164                                   NL80211_FLAG_NEED_RTNL,
12165         },
12166         {
12167                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
12168                 .doit = nl80211_update_mesh_config,
12169                 .policy = nl80211_policy,
12170                 .flags = GENL_UNS_ADMIN_PERM,
12171                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12172                                   NL80211_FLAG_NEED_RTNL,
12173         },
12174         {
12175                 .cmd = NL80211_CMD_TRIGGER_SCAN,
12176                 .doit = nl80211_trigger_scan,
12177                 .policy = nl80211_policy,
12178                 .flags = GENL_UNS_ADMIN_PERM,
12179                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12180                                   NL80211_FLAG_NEED_RTNL,
12181         },
12182         {
12183                 .cmd = NL80211_CMD_ABORT_SCAN,
12184                 .doit = nl80211_abort_scan,
12185                 .policy = nl80211_policy,
12186                 .flags = GENL_UNS_ADMIN_PERM,
12187                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12188                                   NL80211_FLAG_NEED_RTNL,
12189         },
12190         {
12191                 .cmd = NL80211_CMD_GET_SCAN,
12192                 .policy = nl80211_policy,
12193                 .dumpit = nl80211_dump_scan,
12194         },
12195         {
12196                 .cmd = NL80211_CMD_START_SCHED_SCAN,
12197                 .doit = nl80211_start_sched_scan,
12198                 .policy = nl80211_policy,
12199                 .flags = GENL_UNS_ADMIN_PERM,
12200                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12201                                   NL80211_FLAG_NEED_RTNL,
12202         },
12203         {
12204                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
12205                 .doit = nl80211_stop_sched_scan,
12206                 .policy = nl80211_policy,
12207                 .flags = GENL_UNS_ADMIN_PERM,
12208                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12209                                   NL80211_FLAG_NEED_RTNL,
12210         },
12211         {
12212                 .cmd = NL80211_CMD_AUTHENTICATE,
12213                 .doit = nl80211_authenticate,
12214                 .policy = nl80211_policy,
12215                 .flags = GENL_UNS_ADMIN_PERM,
12216                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12217                                   NL80211_FLAG_NEED_RTNL |
12218                                   NL80211_FLAG_CLEAR_SKB,
12219         },
12220         {
12221                 .cmd = NL80211_CMD_ASSOCIATE,
12222                 .doit = nl80211_associate,
12223                 .policy = nl80211_policy,
12224                 .flags = GENL_UNS_ADMIN_PERM,
12225                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12226                                   NL80211_FLAG_NEED_RTNL,
12227         },
12228         {
12229                 .cmd = NL80211_CMD_DEAUTHENTICATE,
12230                 .doit = nl80211_deauthenticate,
12231                 .policy = nl80211_policy,
12232                 .flags = GENL_UNS_ADMIN_PERM,
12233                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12234                                   NL80211_FLAG_NEED_RTNL,
12235         },
12236         {
12237                 .cmd = NL80211_CMD_DISASSOCIATE,
12238                 .doit = nl80211_disassociate,
12239                 .policy = nl80211_policy,
12240                 .flags = GENL_UNS_ADMIN_PERM,
12241                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12242                                   NL80211_FLAG_NEED_RTNL,
12243         },
12244         {
12245                 .cmd = NL80211_CMD_JOIN_IBSS,
12246                 .doit = nl80211_join_ibss,
12247                 .policy = nl80211_policy,
12248                 .flags = GENL_UNS_ADMIN_PERM,
12249                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12250                                   NL80211_FLAG_NEED_RTNL,
12251         },
12252         {
12253                 .cmd = NL80211_CMD_LEAVE_IBSS,
12254                 .doit = nl80211_leave_ibss,
12255                 .policy = nl80211_policy,
12256                 .flags = GENL_UNS_ADMIN_PERM,
12257                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12258                                   NL80211_FLAG_NEED_RTNL,
12259         },
12260 #ifdef CONFIG_NL80211_TESTMODE
12261         {
12262                 .cmd = NL80211_CMD_TESTMODE,
12263                 .doit = nl80211_testmode_do,
12264                 .dumpit = nl80211_testmode_dump,
12265                 .policy = nl80211_policy,
12266                 .flags = GENL_UNS_ADMIN_PERM,
12267                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12268                                   NL80211_FLAG_NEED_RTNL,
12269         },
12270 #endif
12271         {
12272                 .cmd = NL80211_CMD_CONNECT,
12273                 .doit = nl80211_connect,
12274                 .policy = nl80211_policy,
12275                 .flags = GENL_UNS_ADMIN_PERM,
12276                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12277                                   NL80211_FLAG_NEED_RTNL,
12278         },
12279         {
12280                 .cmd = NL80211_CMD_UPDATE_CONNECT_PARAMS,
12281                 .doit = nl80211_update_connect_params,
12282                 .policy = nl80211_policy,
12283                 .flags = GENL_ADMIN_PERM,
12284                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12285                                   NL80211_FLAG_NEED_RTNL,
12286         },
12287         {
12288                 .cmd = NL80211_CMD_DISCONNECT,
12289                 .doit = nl80211_disconnect,
12290                 .policy = nl80211_policy,
12291                 .flags = GENL_UNS_ADMIN_PERM,
12292                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12293                                   NL80211_FLAG_NEED_RTNL,
12294         },
12295         {
12296                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
12297                 .doit = nl80211_wiphy_netns,
12298                 .policy = nl80211_policy,
12299                 .flags = GENL_UNS_ADMIN_PERM,
12300                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12301                                   NL80211_FLAG_NEED_RTNL,
12302         },
12303         {
12304                 .cmd = NL80211_CMD_GET_SURVEY,
12305                 .policy = nl80211_policy,
12306                 .dumpit = nl80211_dump_survey,
12307         },
12308         {
12309                 .cmd = NL80211_CMD_SET_PMKSA,
12310                 .doit = nl80211_setdel_pmksa,
12311                 .policy = nl80211_policy,
12312                 .flags = GENL_UNS_ADMIN_PERM,
12313                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12314                                   NL80211_FLAG_NEED_RTNL,
12315         },
12316         {
12317                 .cmd = NL80211_CMD_DEL_PMKSA,
12318                 .doit = nl80211_setdel_pmksa,
12319                 .policy = nl80211_policy,
12320                 .flags = GENL_UNS_ADMIN_PERM,
12321                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12322                                   NL80211_FLAG_NEED_RTNL,
12323         },
12324         {
12325                 .cmd = NL80211_CMD_FLUSH_PMKSA,
12326                 .doit = nl80211_flush_pmksa,
12327                 .policy = nl80211_policy,
12328                 .flags = GENL_UNS_ADMIN_PERM,
12329                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12330                                   NL80211_FLAG_NEED_RTNL,
12331         },
12332         {
12333                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
12334                 .doit = nl80211_remain_on_channel,
12335                 .policy = nl80211_policy,
12336                 .flags = GENL_UNS_ADMIN_PERM,
12337                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12338                                   NL80211_FLAG_NEED_RTNL,
12339         },
12340         {
12341                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12342                 .doit = nl80211_cancel_remain_on_channel,
12343                 .policy = nl80211_policy,
12344                 .flags = GENL_UNS_ADMIN_PERM,
12345                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12346                                   NL80211_FLAG_NEED_RTNL,
12347         },
12348         {
12349                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
12350                 .doit = nl80211_set_tx_bitrate_mask,
12351                 .policy = nl80211_policy,
12352                 .flags = GENL_UNS_ADMIN_PERM,
12353                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12354                                   NL80211_FLAG_NEED_RTNL,
12355         },
12356         {
12357                 .cmd = NL80211_CMD_REGISTER_FRAME,
12358                 .doit = nl80211_register_mgmt,
12359                 .policy = nl80211_policy,
12360                 .flags = GENL_UNS_ADMIN_PERM,
12361                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12362                                   NL80211_FLAG_NEED_RTNL,
12363         },
12364         {
12365                 .cmd = NL80211_CMD_FRAME,
12366                 .doit = nl80211_tx_mgmt,
12367                 .policy = nl80211_policy,
12368                 .flags = GENL_UNS_ADMIN_PERM,
12369                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12370                                   NL80211_FLAG_NEED_RTNL,
12371         },
12372         {
12373                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
12374                 .doit = nl80211_tx_mgmt_cancel_wait,
12375                 .policy = nl80211_policy,
12376                 .flags = GENL_UNS_ADMIN_PERM,
12377                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12378                                   NL80211_FLAG_NEED_RTNL,
12379         },
12380         {
12381                 .cmd = NL80211_CMD_SET_POWER_SAVE,
12382                 .doit = nl80211_set_power_save,
12383                 .policy = nl80211_policy,
12384                 .flags = GENL_UNS_ADMIN_PERM,
12385                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12386                                   NL80211_FLAG_NEED_RTNL,
12387         },
12388         {
12389                 .cmd = NL80211_CMD_GET_POWER_SAVE,
12390                 .doit = nl80211_get_power_save,
12391                 .policy = nl80211_policy,
12392                 /* can be retrieved by unprivileged users */
12393                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12394                                   NL80211_FLAG_NEED_RTNL,
12395         },
12396         {
12397                 .cmd = NL80211_CMD_SET_CQM,
12398                 .doit = nl80211_set_cqm,
12399                 .policy = nl80211_policy,
12400                 .flags = GENL_UNS_ADMIN_PERM,
12401                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12402                                   NL80211_FLAG_NEED_RTNL,
12403         },
12404         {
12405                 .cmd = NL80211_CMD_SET_CHANNEL,
12406                 .doit = nl80211_set_channel,
12407                 .policy = nl80211_policy,
12408                 .flags = GENL_UNS_ADMIN_PERM,
12409                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12410                                   NL80211_FLAG_NEED_RTNL,
12411         },
12412         {
12413                 .cmd = NL80211_CMD_SET_WDS_PEER,
12414                 .doit = nl80211_set_wds_peer,
12415                 .policy = nl80211_policy,
12416                 .flags = GENL_UNS_ADMIN_PERM,
12417                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12418                                   NL80211_FLAG_NEED_RTNL,
12419         },
12420         {
12421                 .cmd = NL80211_CMD_JOIN_MESH,
12422                 .doit = nl80211_join_mesh,
12423                 .policy = nl80211_policy,
12424                 .flags = GENL_UNS_ADMIN_PERM,
12425                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12426                                   NL80211_FLAG_NEED_RTNL,
12427         },
12428         {
12429                 .cmd = NL80211_CMD_LEAVE_MESH,
12430                 .doit = nl80211_leave_mesh,
12431                 .policy = nl80211_policy,
12432                 .flags = GENL_UNS_ADMIN_PERM,
12433                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12434                                   NL80211_FLAG_NEED_RTNL,
12435         },
12436         {
12437                 .cmd = NL80211_CMD_JOIN_OCB,
12438                 .doit = nl80211_join_ocb,
12439                 .policy = nl80211_policy,
12440                 .flags = GENL_UNS_ADMIN_PERM,
12441                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12442                                   NL80211_FLAG_NEED_RTNL,
12443         },
12444         {
12445                 .cmd = NL80211_CMD_LEAVE_OCB,
12446                 .doit = nl80211_leave_ocb,
12447                 .policy = nl80211_policy,
12448                 .flags = GENL_UNS_ADMIN_PERM,
12449                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12450                                   NL80211_FLAG_NEED_RTNL,
12451         },
12452 #ifdef CONFIG_PM
12453         {
12454                 .cmd = NL80211_CMD_GET_WOWLAN,
12455                 .doit = nl80211_get_wowlan,
12456                 .policy = nl80211_policy,
12457                 /* can be retrieved by unprivileged users */
12458                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12459                                   NL80211_FLAG_NEED_RTNL,
12460         },
12461         {
12462                 .cmd = NL80211_CMD_SET_WOWLAN,
12463                 .doit = nl80211_set_wowlan,
12464                 .policy = nl80211_policy,
12465                 .flags = GENL_UNS_ADMIN_PERM,
12466                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12467                                   NL80211_FLAG_NEED_RTNL,
12468         },
12469 #endif
12470         {
12471                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
12472                 .doit = nl80211_set_rekey_data,
12473                 .policy = nl80211_policy,
12474                 .flags = GENL_UNS_ADMIN_PERM,
12475                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12476                                   NL80211_FLAG_NEED_RTNL |
12477                                   NL80211_FLAG_CLEAR_SKB,
12478         },
12479         {
12480                 .cmd = NL80211_CMD_TDLS_MGMT,
12481                 .doit = nl80211_tdls_mgmt,
12482                 .policy = nl80211_policy,
12483                 .flags = GENL_UNS_ADMIN_PERM,
12484                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12485                                   NL80211_FLAG_NEED_RTNL,
12486         },
12487         {
12488                 .cmd = NL80211_CMD_TDLS_OPER,
12489                 .doit = nl80211_tdls_oper,
12490                 .policy = nl80211_policy,
12491                 .flags = GENL_UNS_ADMIN_PERM,
12492                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12493                                   NL80211_FLAG_NEED_RTNL,
12494         },
12495         {
12496                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
12497                 .doit = nl80211_register_unexpected_frame,
12498                 .policy = nl80211_policy,
12499                 .flags = GENL_UNS_ADMIN_PERM,
12500                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12501                                   NL80211_FLAG_NEED_RTNL,
12502         },
12503         {
12504                 .cmd = NL80211_CMD_PROBE_CLIENT,
12505                 .doit = nl80211_probe_client,
12506                 .policy = nl80211_policy,
12507                 .flags = GENL_UNS_ADMIN_PERM,
12508                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12509                                   NL80211_FLAG_NEED_RTNL,
12510         },
12511         {
12512                 .cmd = NL80211_CMD_REGISTER_BEACONS,
12513                 .doit = nl80211_register_beacons,
12514                 .policy = nl80211_policy,
12515                 .flags = GENL_UNS_ADMIN_PERM,
12516                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12517                                   NL80211_FLAG_NEED_RTNL,
12518         },
12519         {
12520                 .cmd = NL80211_CMD_SET_NOACK_MAP,
12521                 .doit = nl80211_set_noack_map,
12522                 .policy = nl80211_policy,
12523                 .flags = GENL_UNS_ADMIN_PERM,
12524                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12525                                   NL80211_FLAG_NEED_RTNL,
12526         },
12527         {
12528                 .cmd = NL80211_CMD_START_P2P_DEVICE,
12529                 .doit = nl80211_start_p2p_device,
12530                 .policy = nl80211_policy,
12531                 .flags = GENL_UNS_ADMIN_PERM,
12532                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12533                                   NL80211_FLAG_NEED_RTNL,
12534         },
12535         {
12536                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
12537                 .doit = nl80211_stop_p2p_device,
12538                 .policy = nl80211_policy,
12539                 .flags = GENL_UNS_ADMIN_PERM,
12540                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12541                                   NL80211_FLAG_NEED_RTNL,
12542         },
12543         {
12544                 .cmd = NL80211_CMD_START_NAN,
12545                 .doit = nl80211_start_nan,
12546                 .policy = nl80211_policy,
12547                 .flags = GENL_ADMIN_PERM,
12548                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12549                                   NL80211_FLAG_NEED_RTNL,
12550         },
12551         {
12552                 .cmd = NL80211_CMD_STOP_NAN,
12553                 .doit = nl80211_stop_nan,
12554                 .policy = nl80211_policy,
12555                 .flags = GENL_ADMIN_PERM,
12556                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12557                                   NL80211_FLAG_NEED_RTNL,
12558         },
12559         {
12560                 .cmd = NL80211_CMD_ADD_NAN_FUNCTION,
12561                 .doit = nl80211_nan_add_func,
12562                 .policy = nl80211_policy,
12563                 .flags = GENL_ADMIN_PERM,
12564                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12565                                   NL80211_FLAG_NEED_RTNL,
12566         },
12567         {
12568                 .cmd = NL80211_CMD_DEL_NAN_FUNCTION,
12569                 .doit = nl80211_nan_del_func,
12570                 .policy = nl80211_policy,
12571                 .flags = GENL_ADMIN_PERM,
12572                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12573                                   NL80211_FLAG_NEED_RTNL,
12574         },
12575         {
12576                 .cmd = NL80211_CMD_CHANGE_NAN_CONFIG,
12577                 .doit = nl80211_nan_change_config,
12578                 .policy = nl80211_policy,
12579                 .flags = GENL_ADMIN_PERM,
12580                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12581                                   NL80211_FLAG_NEED_RTNL,
12582         },
12583         {
12584                 .cmd = NL80211_CMD_SET_MCAST_RATE,
12585                 .doit = nl80211_set_mcast_rate,
12586                 .policy = nl80211_policy,
12587                 .flags = GENL_UNS_ADMIN_PERM,
12588                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12589                                   NL80211_FLAG_NEED_RTNL,
12590         },
12591         {
12592                 .cmd = NL80211_CMD_SET_MAC_ACL,
12593                 .doit = nl80211_set_mac_acl,
12594                 .policy = nl80211_policy,
12595                 .flags = GENL_UNS_ADMIN_PERM,
12596                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12597                                   NL80211_FLAG_NEED_RTNL,
12598         },
12599         {
12600                 .cmd = NL80211_CMD_RADAR_DETECT,
12601                 .doit = nl80211_start_radar_detection,
12602                 .policy = nl80211_policy,
12603                 .flags = GENL_UNS_ADMIN_PERM,
12604                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12605                                   NL80211_FLAG_NEED_RTNL,
12606         },
12607         {
12608                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
12609                 .doit = nl80211_get_protocol_features,
12610                 .policy = nl80211_policy,
12611         },
12612         {
12613                 .cmd = NL80211_CMD_UPDATE_FT_IES,
12614                 .doit = nl80211_update_ft_ies,
12615                 .policy = nl80211_policy,
12616                 .flags = GENL_UNS_ADMIN_PERM,
12617                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12618                                   NL80211_FLAG_NEED_RTNL,
12619         },
12620         {
12621                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
12622                 .doit = nl80211_crit_protocol_start,
12623                 .policy = nl80211_policy,
12624                 .flags = GENL_UNS_ADMIN_PERM,
12625                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12626                                   NL80211_FLAG_NEED_RTNL,
12627         },
12628         {
12629                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
12630                 .doit = nl80211_crit_protocol_stop,
12631                 .policy = nl80211_policy,
12632                 .flags = GENL_UNS_ADMIN_PERM,
12633                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12634                                   NL80211_FLAG_NEED_RTNL,
12635         },
12636         {
12637                 .cmd = NL80211_CMD_GET_COALESCE,
12638                 .doit = nl80211_get_coalesce,
12639                 .policy = nl80211_policy,
12640                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12641                                   NL80211_FLAG_NEED_RTNL,
12642         },
12643         {
12644                 .cmd = NL80211_CMD_SET_COALESCE,
12645                 .doit = nl80211_set_coalesce,
12646                 .policy = nl80211_policy,
12647                 .flags = GENL_UNS_ADMIN_PERM,
12648                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12649                                   NL80211_FLAG_NEED_RTNL,
12650         },
12651         {
12652                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
12653                 .doit = nl80211_channel_switch,
12654                 .policy = nl80211_policy,
12655                 .flags = GENL_UNS_ADMIN_PERM,
12656                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12657                                   NL80211_FLAG_NEED_RTNL,
12658         },
12659         {
12660                 .cmd = NL80211_CMD_VENDOR,
12661                 .doit = nl80211_vendor_cmd,
12662                 .dumpit = nl80211_vendor_cmd_dump,
12663                 .policy = nl80211_policy,
12664                 .flags = GENL_UNS_ADMIN_PERM,
12665                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12666                                   NL80211_FLAG_NEED_RTNL,
12667         },
12668         {
12669                 .cmd = NL80211_CMD_SET_QOS_MAP,
12670                 .doit = nl80211_set_qos_map,
12671                 .policy = nl80211_policy,
12672                 .flags = GENL_UNS_ADMIN_PERM,
12673                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12674                                   NL80211_FLAG_NEED_RTNL,
12675         },
12676         {
12677                 .cmd = NL80211_CMD_ADD_TX_TS,
12678                 .doit = nl80211_add_tx_ts,
12679                 .policy = nl80211_policy,
12680                 .flags = GENL_UNS_ADMIN_PERM,
12681                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12682                                   NL80211_FLAG_NEED_RTNL,
12683         },
12684         {
12685                 .cmd = NL80211_CMD_DEL_TX_TS,
12686                 .doit = nl80211_del_tx_ts,
12687                 .policy = nl80211_policy,
12688                 .flags = GENL_UNS_ADMIN_PERM,
12689                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12690                                   NL80211_FLAG_NEED_RTNL,
12691         },
12692         {
12693                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
12694                 .doit = nl80211_tdls_channel_switch,
12695                 .policy = nl80211_policy,
12696                 .flags = GENL_UNS_ADMIN_PERM,
12697                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12698                                   NL80211_FLAG_NEED_RTNL,
12699         },
12700         {
12701                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
12702                 .doit = nl80211_tdls_cancel_channel_switch,
12703                 .policy = nl80211_policy,
12704                 .flags = GENL_UNS_ADMIN_PERM,
12705                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12706                                   NL80211_FLAG_NEED_RTNL,
12707         },
12708         {
12709                 .cmd = NL80211_CMD_SET_MULTICAST_TO_UNICAST,
12710                 .doit = nl80211_set_multicast_to_unicast,
12711                 .policy = nl80211_policy,
12712                 .flags = GENL_UNS_ADMIN_PERM,
12713                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12714                                   NL80211_FLAG_NEED_RTNL,
12715         },
12716 };
12717
12718 static struct genl_family nl80211_fam __ro_after_init = {
12719         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
12720         .hdrsize = 0,                   /* no private header */
12721         .version = 1,                   /* no particular meaning now */
12722         .maxattr = NL80211_ATTR_MAX,
12723         .netnsok = true,
12724         .pre_doit = nl80211_pre_doit,
12725         .post_doit = nl80211_post_doit,
12726         .module = THIS_MODULE,
12727         .ops = nl80211_ops,
12728         .n_ops = ARRAY_SIZE(nl80211_ops),
12729         .mcgrps = nl80211_mcgrps,
12730         .n_mcgrps = ARRAY_SIZE(nl80211_mcgrps),
12731 };
12732
12733 /* notification functions */
12734
12735 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
12736                           enum nl80211_commands cmd)
12737 {
12738         struct sk_buff *msg;
12739         struct nl80211_dump_wiphy_state state = {};
12740
12741         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
12742                 cmd != NL80211_CMD_DEL_WIPHY);
12743
12744         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12745         if (!msg)
12746                 return;
12747
12748         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
12749                 nlmsg_free(msg);
12750                 return;
12751         }
12752
12753         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12754                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
12755 }
12756
12757 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
12758                                 struct wireless_dev *wdev,
12759                                 enum nl80211_commands cmd)
12760 {
12761         struct sk_buff *msg;
12762
12763         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
12764                 cmd != NL80211_CMD_DEL_INTERFACE);
12765
12766         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12767         if (!msg)
12768                 return;
12769
12770         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
12771                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
12772                 nlmsg_free(msg);
12773                 return;
12774         }
12775
12776         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12777                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
12778 }
12779
12780 static int nl80211_add_scan_req(struct sk_buff *msg,
12781                                 struct cfg80211_registered_device *rdev)
12782 {
12783         struct cfg80211_scan_request *req = rdev->scan_req;
12784         struct nlattr *nest;
12785         int i;
12786
12787         if (WARN_ON(!req))
12788                 return 0;
12789
12790         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
12791         if (!nest)
12792                 goto nla_put_failure;
12793         for (i = 0; i < req->n_ssids; i++) {
12794                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
12795                         goto nla_put_failure;
12796         }
12797         nla_nest_end(msg, nest);
12798
12799         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
12800         if (!nest)
12801                 goto nla_put_failure;
12802         for (i = 0; i < req->n_channels; i++) {
12803                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
12804                         goto nla_put_failure;
12805         }
12806         nla_nest_end(msg, nest);
12807
12808         if (req->ie &&
12809             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
12810                 goto nla_put_failure;
12811
12812         if (req->flags &&
12813             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
12814                 goto nla_put_failure;
12815
12816         if (req->info.scan_start_tsf &&
12817             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
12818                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
12819              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
12820                      req->info.tsf_bssid)))
12821                 goto nla_put_failure;
12822
12823         return 0;
12824  nla_put_failure:
12825         return -ENOBUFS;
12826 }
12827
12828 static int nl80211_send_scan_msg(struct sk_buff *msg,
12829                                  struct cfg80211_registered_device *rdev,
12830                                  struct wireless_dev *wdev,
12831                                  u32 portid, u32 seq, int flags,
12832                                  u32 cmd)
12833 {
12834         void *hdr;
12835
12836         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
12837         if (!hdr)
12838                 return -1;
12839
12840         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12841             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12842                                          wdev->netdev->ifindex)) ||
12843             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12844                               NL80211_ATTR_PAD))
12845                 goto nla_put_failure;
12846
12847         /* ignore errors and send incomplete event anyway */
12848         nl80211_add_scan_req(msg, rdev);
12849
12850         genlmsg_end(msg, hdr);
12851         return 0;
12852
12853  nla_put_failure:
12854         genlmsg_cancel(msg, hdr);
12855         return -EMSGSIZE;
12856 }
12857
12858 static int
12859 nl80211_send_sched_scan_msg(struct sk_buff *msg,
12860                             struct cfg80211_registered_device *rdev,
12861                             struct net_device *netdev,
12862                             u32 portid, u32 seq, int flags, u32 cmd)
12863 {
12864         void *hdr;
12865
12866         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
12867         if (!hdr)
12868                 return -1;
12869
12870         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12871             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12872                 goto nla_put_failure;
12873
12874         genlmsg_end(msg, hdr);
12875         return 0;
12876
12877  nla_put_failure:
12878         genlmsg_cancel(msg, hdr);
12879         return -EMSGSIZE;
12880 }
12881
12882 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
12883                              struct wireless_dev *wdev)
12884 {
12885         struct sk_buff *msg;
12886
12887         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12888         if (!msg)
12889                 return;
12890
12891         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
12892                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
12893                 nlmsg_free(msg);
12894                 return;
12895         }
12896
12897         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12898                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12899 }
12900
12901 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
12902                                        struct wireless_dev *wdev, bool aborted)
12903 {
12904         struct sk_buff *msg;
12905
12906         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12907         if (!msg)
12908                 return NULL;
12909
12910         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
12911                                   aborted ? NL80211_CMD_SCAN_ABORTED :
12912                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
12913                 nlmsg_free(msg);
12914                 return NULL;
12915         }
12916
12917         return msg;
12918 }
12919
12920 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
12921                               struct sk_buff *msg)
12922 {
12923         if (!msg)
12924                 return;
12925
12926         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12927                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12928 }
12929
12930 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
12931                                      struct net_device *netdev)
12932 {
12933         struct sk_buff *msg;
12934
12935         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12936         if (!msg)
12937                 return;
12938
12939         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
12940                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
12941                 nlmsg_free(msg);
12942                 return;
12943         }
12944
12945         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12946                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12947 }
12948
12949 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
12950                              struct net_device *netdev, u32 cmd)
12951 {
12952         struct sk_buff *msg;
12953
12954         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12955         if (!msg)
12956                 return;
12957
12958         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
12959                 nlmsg_free(msg);
12960                 return;
12961         }
12962
12963         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12964                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12965 }
12966
12967 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
12968                                           struct regulatory_request *request)
12969 {
12970         /* Userspace can always count this one always being set */
12971         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
12972                 goto nla_put_failure;
12973
12974         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
12975                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12976                                NL80211_REGDOM_TYPE_WORLD))
12977                         goto nla_put_failure;
12978         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
12979                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12980                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
12981                         goto nla_put_failure;
12982         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
12983                    request->intersect) {
12984                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12985                                NL80211_REGDOM_TYPE_INTERSECTION))
12986                         goto nla_put_failure;
12987         } else {
12988                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12989                                NL80211_REGDOM_TYPE_COUNTRY) ||
12990                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
12991                                    request->alpha2))
12992                         goto nla_put_failure;
12993         }
12994
12995         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
12996                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
12997
12998                 if (wiphy &&
12999                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
13000                         goto nla_put_failure;
13001
13002                 if (wiphy &&
13003                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
13004                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
13005                         goto nla_put_failure;
13006         }
13007
13008         return true;
13009
13010 nla_put_failure:
13011         return false;
13012 }
13013
13014 /*
13015  * This can happen on global regulatory changes or device specific settings
13016  * based on custom regulatory domains.
13017  */
13018 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
13019                                      struct regulatory_request *request)
13020 {
13021         struct sk_buff *msg;
13022         void *hdr;
13023
13024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13025         if (!msg)
13026                 return;
13027
13028         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
13029         if (!hdr) {
13030                 nlmsg_free(msg);
13031                 return;
13032         }
13033
13034         if (nl80211_reg_change_event_fill(msg, request) == false)
13035                 goto nla_put_failure;
13036
13037         genlmsg_end(msg, hdr);
13038
13039         rcu_read_lock();
13040         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
13041                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
13042         rcu_read_unlock();
13043
13044         return;
13045
13046 nla_put_failure:
13047         genlmsg_cancel(msg, hdr);
13048         nlmsg_free(msg);
13049 }
13050
13051 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
13052                                     struct net_device *netdev,
13053                                     const u8 *buf, size_t len,
13054                                     enum nl80211_commands cmd, gfp_t gfp,
13055                                     int uapsd_queues)
13056 {
13057         struct sk_buff *msg;
13058         void *hdr;
13059
13060         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13061         if (!msg)
13062                 return;
13063
13064         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13065         if (!hdr) {
13066                 nlmsg_free(msg);
13067                 return;
13068         }
13069
13070         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13071             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13072             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
13073                 goto nla_put_failure;
13074
13075         if (uapsd_queues >= 0) {
13076                 struct nlattr *nla_wmm =
13077                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
13078                 if (!nla_wmm)
13079                         goto nla_put_failure;
13080
13081                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
13082                                uapsd_queues))
13083                         goto nla_put_failure;
13084
13085                 nla_nest_end(msg, nla_wmm);
13086         }
13087
13088         genlmsg_end(msg, hdr);
13089
13090         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13091                                 NL80211_MCGRP_MLME, gfp);
13092         return;
13093
13094  nla_put_failure:
13095         genlmsg_cancel(msg, hdr);
13096         nlmsg_free(msg);
13097 }
13098
13099 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
13100                           struct net_device *netdev, const u8 *buf,
13101                           size_t len, gfp_t gfp)
13102 {
13103         nl80211_send_mlme_event(rdev, netdev, buf, len,
13104                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
13105 }
13106
13107 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
13108                            struct net_device *netdev, const u8 *buf,
13109                            size_t len, gfp_t gfp, int uapsd_queues)
13110 {
13111         nl80211_send_mlme_event(rdev, netdev, buf, len,
13112                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
13113 }
13114
13115 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
13116                          struct net_device *netdev, const u8 *buf,
13117                          size_t len, gfp_t gfp)
13118 {
13119         nl80211_send_mlme_event(rdev, netdev, buf, len,
13120                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
13121 }
13122
13123 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
13124                            struct net_device *netdev, const u8 *buf,
13125                            size_t len, gfp_t gfp)
13126 {
13127         nl80211_send_mlme_event(rdev, netdev, buf, len,
13128                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
13129 }
13130
13131 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
13132                                   size_t len)
13133 {
13134         struct wireless_dev *wdev = dev->ieee80211_ptr;
13135         struct wiphy *wiphy = wdev->wiphy;
13136         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13137         const struct ieee80211_mgmt *mgmt = (void *)buf;
13138         u32 cmd;
13139
13140         if (WARN_ON(len < 2))
13141                 return;
13142
13143         if (ieee80211_is_deauth(mgmt->frame_control))
13144                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
13145         else
13146                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
13147
13148         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
13149         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
13150 }
13151 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
13152
13153 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
13154                                       struct net_device *netdev, int cmd,
13155                                       const u8 *addr, gfp_t gfp)
13156 {
13157         struct sk_buff *msg;
13158         void *hdr;
13159
13160         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13161         if (!msg)
13162                 return;
13163
13164         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13165         if (!hdr) {
13166                 nlmsg_free(msg);
13167                 return;
13168         }
13169
13170         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13171             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13172             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
13173             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
13174                 goto nla_put_failure;
13175
13176         genlmsg_end(msg, hdr);
13177
13178         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13179                                 NL80211_MCGRP_MLME, gfp);
13180         return;
13181
13182  nla_put_failure:
13183         genlmsg_cancel(msg, hdr);
13184         nlmsg_free(msg);
13185 }
13186
13187 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
13188                                struct net_device *netdev, const u8 *addr,
13189                                gfp_t gfp)
13190 {
13191         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
13192                                   addr, gfp);
13193 }
13194
13195 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
13196                                 struct net_device *netdev, const u8 *addr,
13197                                 gfp_t gfp)
13198 {
13199         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
13200                                   addr, gfp);
13201 }
13202
13203 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
13204                                  struct net_device *netdev, const u8 *bssid,
13205                                  const u8 *req_ie, size_t req_ie_len,
13206                                  const u8 *resp_ie, size_t resp_ie_len,
13207                                  int status, gfp_t gfp)
13208 {
13209         struct sk_buff *msg;
13210         void *hdr;
13211
13212         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13213         if (!msg)
13214                 return;
13215
13216         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
13217         if (!hdr) {
13218                 nlmsg_free(msg);
13219                 return;
13220         }
13221
13222         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13223             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13224             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
13225             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
13226                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
13227                         status) ||
13228             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
13229             (req_ie &&
13230              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
13231             (resp_ie &&
13232              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
13233                 goto nla_put_failure;
13234
13235         genlmsg_end(msg, hdr);
13236
13237         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13238                                 NL80211_MCGRP_MLME, gfp);
13239         return;
13240
13241  nla_put_failure:
13242         genlmsg_cancel(msg, hdr);
13243         nlmsg_free(msg);
13244 }
13245
13246 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
13247                          struct net_device *netdev, const u8 *bssid,
13248                          const u8 *req_ie, size_t req_ie_len,
13249                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
13250 {
13251         struct sk_buff *msg;
13252         void *hdr;
13253
13254         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13255         if (!msg)
13256                 return;
13257
13258         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
13259         if (!hdr) {
13260                 nlmsg_free(msg);
13261                 return;
13262         }
13263
13264         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13265             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13266             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
13267             (req_ie &&
13268              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
13269             (resp_ie &&
13270              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
13271                 goto nla_put_failure;
13272
13273         genlmsg_end(msg, hdr);
13274
13275         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13276                                 NL80211_MCGRP_MLME, gfp);
13277         return;
13278
13279  nla_put_failure:
13280         genlmsg_cancel(msg, hdr);
13281         nlmsg_free(msg);
13282 }
13283
13284 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
13285                                struct net_device *netdev, u16 reason,
13286                                const u8 *ie, size_t ie_len, bool from_ap)
13287 {
13288         struct sk_buff *msg;
13289         void *hdr;
13290
13291         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13292         if (!msg)
13293                 return;
13294
13295         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
13296         if (!hdr) {
13297                 nlmsg_free(msg);
13298                 return;
13299         }
13300
13301         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13302             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13303             (from_ap && reason &&
13304              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
13305             (from_ap &&
13306              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
13307             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
13308                 goto nla_put_failure;
13309
13310         genlmsg_end(msg, hdr);
13311
13312         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13313                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13314         return;
13315
13316  nla_put_failure:
13317         genlmsg_cancel(msg, hdr);
13318         nlmsg_free(msg);
13319 }
13320
13321 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
13322                              struct net_device *netdev, const u8 *bssid,
13323                              gfp_t gfp)
13324 {
13325         struct sk_buff *msg;
13326         void *hdr;
13327
13328         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13329         if (!msg)
13330                 return;
13331
13332         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
13333         if (!hdr) {
13334                 nlmsg_free(msg);
13335                 return;
13336         }
13337
13338         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13339             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13340             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13341                 goto nla_put_failure;
13342
13343         genlmsg_end(msg, hdr);
13344
13345         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13346                                 NL80211_MCGRP_MLME, gfp);
13347         return;
13348
13349  nla_put_failure:
13350         genlmsg_cancel(msg, hdr);
13351         nlmsg_free(msg);
13352 }
13353
13354 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
13355                                         const u8* ie, u8 ie_len, gfp_t gfp)
13356 {
13357         struct wireless_dev *wdev = dev->ieee80211_ptr;
13358         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13359         struct sk_buff *msg;
13360         void *hdr;
13361
13362         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
13363                 return;
13364
13365         trace_cfg80211_notify_new_peer_candidate(dev, addr);
13366
13367         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13368         if (!msg)
13369                 return;
13370
13371         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
13372         if (!hdr) {
13373                 nlmsg_free(msg);
13374                 return;
13375         }
13376
13377         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13378             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13379             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13380             (ie_len && ie &&
13381              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
13382                 goto nla_put_failure;
13383
13384         genlmsg_end(msg, hdr);
13385
13386         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13387                                 NL80211_MCGRP_MLME, gfp);
13388         return;
13389
13390  nla_put_failure:
13391         genlmsg_cancel(msg, hdr);
13392         nlmsg_free(msg);
13393 }
13394 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
13395
13396 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
13397                                  struct net_device *netdev, const u8 *addr,
13398                                  enum nl80211_key_type key_type, int key_id,
13399                                  const u8 *tsc, gfp_t gfp)
13400 {
13401         struct sk_buff *msg;
13402         void *hdr;
13403
13404         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13405         if (!msg)
13406                 return;
13407
13408         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
13409         if (!hdr) {
13410                 nlmsg_free(msg);
13411                 return;
13412         }
13413
13414         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13415             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13416             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
13417             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
13418             (key_id != -1 &&
13419              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
13420             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
13421                 goto nla_put_failure;
13422
13423         genlmsg_end(msg, hdr);
13424
13425         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13426                                 NL80211_MCGRP_MLME, gfp);
13427         return;
13428
13429  nla_put_failure:
13430         genlmsg_cancel(msg, hdr);
13431         nlmsg_free(msg);
13432 }
13433
13434 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
13435                                     struct ieee80211_channel *channel_before,
13436                                     struct ieee80211_channel *channel_after)
13437 {
13438         struct sk_buff *msg;
13439         void *hdr;
13440         struct nlattr *nl_freq;
13441
13442         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
13443         if (!msg)
13444                 return;
13445
13446         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
13447         if (!hdr) {
13448                 nlmsg_free(msg);
13449                 return;
13450         }
13451
13452         /*
13453          * Since we are applying the beacon hint to a wiphy we know its
13454          * wiphy_idx is valid
13455          */
13456         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
13457                 goto nla_put_failure;
13458
13459         /* Before */
13460         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
13461         if (!nl_freq)
13462                 goto nla_put_failure;
13463         if (nl80211_msg_put_channel(msg, channel_before, false))
13464                 goto nla_put_failure;
13465         nla_nest_end(msg, nl_freq);
13466
13467         /* After */
13468         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
13469         if (!nl_freq)
13470                 goto nla_put_failure;
13471         if (nl80211_msg_put_channel(msg, channel_after, false))
13472                 goto nla_put_failure;
13473         nla_nest_end(msg, nl_freq);
13474
13475         genlmsg_end(msg, hdr);
13476
13477         rcu_read_lock();
13478         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
13479                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
13480         rcu_read_unlock();
13481
13482         return;
13483
13484 nla_put_failure:
13485         genlmsg_cancel(msg, hdr);
13486         nlmsg_free(msg);
13487 }
13488
13489 static void nl80211_send_remain_on_chan_event(
13490         int cmd, struct cfg80211_registered_device *rdev,
13491         struct wireless_dev *wdev, u64 cookie,
13492         struct ieee80211_channel *chan,
13493         unsigned int duration, gfp_t gfp)
13494 {
13495         struct sk_buff *msg;
13496         void *hdr;
13497
13498         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13499         if (!msg)
13500                 return;
13501
13502         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13503         if (!hdr) {
13504                 nlmsg_free(msg);
13505                 return;
13506         }
13507
13508         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13509             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13510                                          wdev->netdev->ifindex)) ||
13511             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13512                               NL80211_ATTR_PAD) ||
13513             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
13514             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
13515                         NL80211_CHAN_NO_HT) ||
13516             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13517                               NL80211_ATTR_PAD))
13518                 goto nla_put_failure;
13519
13520         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
13521             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
13522                 goto nla_put_failure;
13523
13524         genlmsg_end(msg, hdr);
13525
13526         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13527                                 NL80211_MCGRP_MLME, gfp);
13528         return;
13529
13530  nla_put_failure:
13531         genlmsg_cancel(msg, hdr);
13532         nlmsg_free(msg);
13533 }
13534
13535 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
13536                                struct ieee80211_channel *chan,
13537                                unsigned int duration, gfp_t gfp)
13538 {
13539         struct wiphy *wiphy = wdev->wiphy;
13540         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13541
13542         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
13543         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
13544                                           rdev, wdev, cookie, chan,
13545                                           duration, gfp);
13546 }
13547 EXPORT_SYMBOL(cfg80211_ready_on_channel);
13548
13549 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
13550                                         struct ieee80211_channel *chan,
13551                                         gfp_t gfp)
13552 {
13553         struct wiphy *wiphy = wdev->wiphy;
13554         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13555
13556         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
13557         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
13558                                           rdev, wdev, cookie, chan, 0, gfp);
13559 }
13560 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
13561
13562 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
13563                       struct station_info *sinfo, gfp_t gfp)
13564 {
13565         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
13566         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13567         struct sk_buff *msg;
13568
13569         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
13570
13571         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13572         if (!msg)
13573                 return;
13574
13575         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
13576                                  rdev, dev, mac_addr, sinfo) < 0) {
13577                 nlmsg_free(msg);
13578                 return;
13579         }
13580
13581         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13582                                 NL80211_MCGRP_MLME, gfp);
13583 }
13584 EXPORT_SYMBOL(cfg80211_new_sta);
13585
13586 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
13587                             struct station_info *sinfo, gfp_t gfp)
13588 {
13589         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
13590         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13591         struct sk_buff *msg;
13592         struct station_info empty_sinfo = {};
13593
13594         if (!sinfo)
13595                 sinfo = &empty_sinfo;
13596
13597         trace_cfg80211_del_sta(dev, mac_addr);
13598
13599         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13600         if (!msg)
13601                 return;
13602
13603         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
13604                                  rdev, dev, mac_addr, sinfo) < 0) {
13605                 nlmsg_free(msg);
13606                 return;
13607         }
13608
13609         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13610                                 NL80211_MCGRP_MLME, gfp);
13611 }
13612 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
13613
13614 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
13615                           enum nl80211_connect_failed_reason reason,
13616                           gfp_t gfp)
13617 {
13618         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
13619         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13620         struct sk_buff *msg;
13621         void *hdr;
13622
13623         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
13624         if (!msg)
13625                 return;
13626
13627         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
13628         if (!hdr) {
13629                 nlmsg_free(msg);
13630                 return;
13631         }
13632
13633         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13634             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
13635             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
13636                 goto nla_put_failure;
13637
13638         genlmsg_end(msg, hdr);
13639
13640         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13641                                 NL80211_MCGRP_MLME, gfp);
13642         return;
13643
13644  nla_put_failure:
13645         genlmsg_cancel(msg, hdr);
13646         nlmsg_free(msg);
13647 }
13648 EXPORT_SYMBOL(cfg80211_conn_failed);
13649
13650 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
13651                                        const u8 *addr, gfp_t gfp)
13652 {
13653         struct wireless_dev *wdev = dev->ieee80211_ptr;
13654         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13655         struct sk_buff *msg;
13656         void *hdr;
13657         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
13658
13659         if (!nlportid)
13660                 return false;
13661
13662         msg = nlmsg_new(100, gfp);
13663         if (!msg)
13664                 return true;
13665
13666         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13667         if (!hdr) {
13668                 nlmsg_free(msg);
13669                 return true;
13670         }
13671
13672         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13673             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13674             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
13675                 goto nla_put_failure;
13676
13677         genlmsg_end(msg, hdr);
13678         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13679         return true;
13680
13681  nla_put_failure:
13682         genlmsg_cancel(msg, hdr);
13683         nlmsg_free(msg);
13684         return true;
13685 }
13686
13687 bool cfg80211_rx_spurious_frame(struct net_device *dev,
13688                                 const u8 *addr, gfp_t gfp)
13689 {
13690         struct wireless_dev *wdev = dev->ieee80211_ptr;
13691         bool ret;
13692
13693         trace_cfg80211_rx_spurious_frame(dev, addr);
13694
13695         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
13696                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
13697                 trace_cfg80211_return_bool(false);
13698                 return false;
13699         }
13700         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
13701                                          addr, gfp);
13702         trace_cfg80211_return_bool(ret);
13703         return ret;
13704 }
13705 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
13706
13707 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
13708                                         const u8 *addr, gfp_t gfp)
13709 {
13710         struct wireless_dev *wdev = dev->ieee80211_ptr;
13711         bool ret;
13712
13713         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
13714
13715         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
13716                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
13717                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
13718                 trace_cfg80211_return_bool(false);
13719                 return false;
13720         }
13721         ret = __nl80211_unexpected_frame(dev,
13722                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
13723                                          addr, gfp);
13724         trace_cfg80211_return_bool(ret);
13725         return ret;
13726 }
13727 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
13728
13729 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
13730                       struct wireless_dev *wdev, u32 nlportid,
13731                       int freq, int sig_dbm,
13732                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
13733 {
13734         struct net_device *netdev = wdev->netdev;
13735         struct sk_buff *msg;
13736         void *hdr;
13737
13738         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13739         if (!msg)
13740                 return -ENOMEM;
13741
13742         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13743         if (!hdr) {
13744                 nlmsg_free(msg);
13745                 return -ENOMEM;
13746         }
13747
13748         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13749             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13750                                         netdev->ifindex)) ||
13751             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13752                               NL80211_ATTR_PAD) ||
13753             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
13754             (sig_dbm &&
13755              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13756             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
13757             (flags &&
13758              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
13759                 goto nla_put_failure;
13760
13761         genlmsg_end(msg, hdr);
13762
13763         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13764
13765  nla_put_failure:
13766         genlmsg_cancel(msg, hdr);
13767         nlmsg_free(msg);
13768         return -ENOBUFS;
13769 }
13770
13771 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
13772                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
13773 {
13774         struct wiphy *wiphy = wdev->wiphy;
13775         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13776         struct net_device *netdev = wdev->netdev;
13777         struct sk_buff *msg;
13778         void *hdr;
13779
13780         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
13781
13782         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13783         if (!msg)
13784                 return;
13785
13786         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
13787         if (!hdr) {
13788                 nlmsg_free(msg);
13789                 return;
13790         }
13791
13792         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13793             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13794                                    netdev->ifindex)) ||
13795             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13796                               NL80211_ATTR_PAD) ||
13797             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
13798             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13799                               NL80211_ATTR_PAD) ||
13800             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
13801                 goto nla_put_failure;
13802
13803         genlmsg_end(msg, hdr);
13804
13805         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13806                                 NL80211_MCGRP_MLME, gfp);
13807         return;
13808
13809  nla_put_failure:
13810         genlmsg_cancel(msg, hdr);
13811         nlmsg_free(msg);
13812 }
13813 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
13814
13815 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
13816                                             const char *mac, gfp_t gfp)
13817 {
13818         struct wireless_dev *wdev = dev->ieee80211_ptr;
13819         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13820         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13821         void **cb;
13822
13823         if (!msg)
13824                 return NULL;
13825
13826         cb = (void **)msg->cb;
13827
13828         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
13829         if (!cb[0]) {
13830                 nlmsg_free(msg);
13831                 return NULL;
13832         }
13833
13834         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13835             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
13836                 goto nla_put_failure;
13837
13838         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
13839                 goto nla_put_failure;
13840
13841         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
13842         if (!cb[1])
13843                 goto nla_put_failure;
13844
13845         cb[2] = rdev;
13846
13847         return msg;
13848  nla_put_failure:
13849         nlmsg_free(msg);
13850         return NULL;
13851 }
13852
13853 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
13854 {
13855         void **cb = (void **)msg->cb;
13856         struct cfg80211_registered_device *rdev = cb[2];
13857
13858         nla_nest_end(msg, cb[1]);
13859         genlmsg_end(msg, cb[0]);
13860
13861         memset(msg->cb, 0, sizeof(msg->cb));
13862
13863         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13864                                 NL80211_MCGRP_MLME, gfp);
13865 }
13866
13867 void cfg80211_cqm_rssi_notify(struct net_device *dev,
13868                               enum nl80211_cqm_rssi_threshold_event rssi_event,
13869                               gfp_t gfp)
13870 {
13871         struct sk_buff *msg;
13872
13873         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
13874
13875         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
13876                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
13877                 return;
13878
13879         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13880         if (!msg)
13881                 return;
13882
13883         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
13884                         rssi_event))
13885                 goto nla_put_failure;
13886
13887         cfg80211_send_cqm(msg, gfp);
13888
13889         return;
13890
13891  nla_put_failure:
13892         nlmsg_free(msg);
13893 }
13894 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
13895
13896 void cfg80211_cqm_txe_notify(struct net_device *dev,
13897                              const u8 *peer, u32 num_packets,
13898                              u32 rate, u32 intvl, gfp_t gfp)
13899 {
13900         struct sk_buff *msg;
13901
13902         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13903         if (!msg)
13904                 return;
13905
13906         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
13907                 goto nla_put_failure;
13908
13909         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
13910                 goto nla_put_failure;
13911
13912         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
13913                 goto nla_put_failure;
13914
13915         cfg80211_send_cqm(msg, gfp);
13916         return;
13917
13918  nla_put_failure:
13919         nlmsg_free(msg);
13920 }
13921 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
13922
13923 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
13924                                  const u8 *peer, u32 num_packets, gfp_t gfp)
13925 {
13926         struct sk_buff *msg;
13927
13928         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
13929
13930         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13931         if (!msg)
13932                 return;
13933
13934         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
13935                 goto nla_put_failure;
13936
13937         cfg80211_send_cqm(msg, gfp);
13938         return;
13939
13940  nla_put_failure:
13941         nlmsg_free(msg);
13942 }
13943 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
13944
13945 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
13946 {
13947         struct sk_buff *msg;
13948
13949         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13950         if (!msg)
13951                 return;
13952
13953         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
13954                 goto nla_put_failure;
13955
13956         cfg80211_send_cqm(msg, gfp);
13957         return;
13958
13959  nla_put_failure:
13960         nlmsg_free(msg);
13961 }
13962 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
13963
13964 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
13965                                      struct net_device *netdev, const u8 *bssid,
13966                                      const u8 *replay_ctr, gfp_t gfp)
13967 {
13968         struct sk_buff *msg;
13969         struct nlattr *rekey_attr;
13970         void *hdr;
13971
13972         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13973         if (!msg)
13974                 return;
13975
13976         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
13977         if (!hdr) {
13978                 nlmsg_free(msg);
13979                 return;
13980         }
13981
13982         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13983             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13984             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13985                 goto nla_put_failure;
13986
13987         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
13988         if (!rekey_attr)
13989                 goto nla_put_failure;
13990
13991         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
13992                     NL80211_REPLAY_CTR_LEN, replay_ctr))
13993                 goto nla_put_failure;
13994
13995         nla_nest_end(msg, rekey_attr);
13996
13997         genlmsg_end(msg, hdr);
13998
13999         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14000                                 NL80211_MCGRP_MLME, gfp);
14001         return;
14002
14003  nla_put_failure:
14004         genlmsg_cancel(msg, hdr);
14005         nlmsg_free(msg);
14006 }
14007
14008 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
14009                                const u8 *replay_ctr, gfp_t gfp)
14010 {
14011         struct wireless_dev *wdev = dev->ieee80211_ptr;
14012         struct wiphy *wiphy = wdev->wiphy;
14013         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14014
14015         trace_cfg80211_gtk_rekey_notify(dev, bssid);
14016         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
14017 }
14018 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
14019
14020 static void
14021 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
14022                                struct net_device *netdev, int index,
14023                                const u8 *bssid, bool preauth, gfp_t gfp)
14024 {
14025         struct sk_buff *msg;
14026         struct nlattr *attr;
14027         void *hdr;
14028
14029         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14030         if (!msg)
14031                 return;
14032
14033         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
14034         if (!hdr) {
14035                 nlmsg_free(msg);
14036                 return;
14037         }
14038
14039         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14040             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
14041                 goto nla_put_failure;
14042
14043         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
14044         if (!attr)
14045                 goto nla_put_failure;
14046
14047         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
14048             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
14049             (preauth &&
14050              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
14051                 goto nla_put_failure;
14052
14053         nla_nest_end(msg, attr);
14054
14055         genlmsg_end(msg, hdr);
14056
14057         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14058                                 NL80211_MCGRP_MLME, gfp);
14059         return;
14060
14061  nla_put_failure:
14062         genlmsg_cancel(msg, hdr);
14063         nlmsg_free(msg);
14064 }
14065
14066 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
14067                                      const u8 *bssid, bool preauth, gfp_t gfp)
14068 {
14069         struct wireless_dev *wdev = dev->ieee80211_ptr;
14070         struct wiphy *wiphy = wdev->wiphy;
14071         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14072
14073         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
14074         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
14075 }
14076 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
14077
14078 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
14079                                      struct net_device *netdev,
14080                                      struct cfg80211_chan_def *chandef,
14081                                      gfp_t gfp,
14082                                      enum nl80211_commands notif,
14083                                      u8 count)
14084 {
14085         struct sk_buff *msg;
14086         void *hdr;
14087
14088         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14089         if (!msg)
14090                 return;
14091
14092         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
14093         if (!hdr) {
14094                 nlmsg_free(msg);
14095                 return;
14096         }
14097
14098         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
14099                 goto nla_put_failure;
14100
14101         if (nl80211_send_chandef(msg, chandef))
14102                 goto nla_put_failure;
14103
14104         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
14105             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
14106                         goto nla_put_failure;
14107
14108         genlmsg_end(msg, hdr);
14109
14110         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14111                                 NL80211_MCGRP_MLME, gfp);
14112         return;
14113
14114  nla_put_failure:
14115         genlmsg_cancel(msg, hdr);
14116         nlmsg_free(msg);
14117 }
14118
14119 void cfg80211_ch_switch_notify(struct net_device *dev,
14120                                struct cfg80211_chan_def *chandef)
14121 {
14122         struct wireless_dev *wdev = dev->ieee80211_ptr;
14123         struct wiphy *wiphy = wdev->wiphy;
14124         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14125
14126         ASSERT_WDEV_LOCK(wdev);
14127
14128         trace_cfg80211_ch_switch_notify(dev, chandef);
14129
14130         wdev->chandef = *chandef;
14131         wdev->preset_chandef = *chandef;
14132         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
14133                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
14134 }
14135 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
14136
14137 void cfg80211_ch_switch_started_notify(struct net_device *dev,
14138                                        struct cfg80211_chan_def *chandef,
14139                                        u8 count)
14140 {
14141         struct wireless_dev *wdev = dev->ieee80211_ptr;
14142         struct wiphy *wiphy = wdev->wiphy;
14143         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14144
14145         trace_cfg80211_ch_switch_started_notify(dev, chandef);
14146
14147         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
14148                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
14149 }
14150 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
14151
14152 void
14153 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
14154                      const struct cfg80211_chan_def *chandef,
14155                      enum nl80211_radar_event event,
14156                      struct net_device *netdev, gfp_t gfp)
14157 {
14158         struct sk_buff *msg;
14159         void *hdr;
14160
14161         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14162         if (!msg)
14163                 return;
14164
14165         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
14166         if (!hdr) {
14167                 nlmsg_free(msg);
14168                 return;
14169         }
14170
14171         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
14172                 goto nla_put_failure;
14173
14174         /* NOP and radar events don't need a netdev parameter */
14175         if (netdev) {
14176                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
14177
14178                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14179                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14180                                       NL80211_ATTR_PAD))
14181                         goto nla_put_failure;
14182         }
14183
14184         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
14185                 goto nla_put_failure;
14186
14187         if (nl80211_send_chandef(msg, chandef))
14188                 goto nla_put_failure;
14189
14190         genlmsg_end(msg, hdr);
14191
14192         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14193                                 NL80211_MCGRP_MLME, gfp);
14194         return;
14195
14196  nla_put_failure:
14197         genlmsg_cancel(msg, hdr);
14198         nlmsg_free(msg);
14199 }
14200
14201 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
14202                            u64 cookie, bool acked, gfp_t gfp)
14203 {
14204         struct wireless_dev *wdev = dev->ieee80211_ptr;
14205         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14206         struct sk_buff *msg;
14207         void *hdr;
14208
14209         trace_cfg80211_probe_status(dev, addr, cookie, acked);
14210
14211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14212
14213         if (!msg)
14214                 return;
14215
14216         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
14217         if (!hdr) {
14218                 nlmsg_free(msg);
14219                 return;
14220         }
14221
14222         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14223             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14224             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
14225             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14226                               NL80211_ATTR_PAD) ||
14227             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
14228                 goto nla_put_failure;
14229
14230         genlmsg_end(msg, hdr);
14231
14232         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14233                                 NL80211_MCGRP_MLME, gfp);
14234         return;
14235
14236  nla_put_failure:
14237         genlmsg_cancel(msg, hdr);
14238         nlmsg_free(msg);
14239 }
14240 EXPORT_SYMBOL(cfg80211_probe_status);
14241
14242 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
14243                                  const u8 *frame, size_t len,
14244                                  int freq, int sig_dbm)
14245 {
14246         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14247         struct sk_buff *msg;
14248         void *hdr;
14249         struct cfg80211_beacon_registration *reg;
14250
14251         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
14252
14253         spin_lock_bh(&rdev->beacon_registrations_lock);
14254         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
14255                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
14256                 if (!msg) {
14257                         spin_unlock_bh(&rdev->beacon_registrations_lock);
14258                         return;
14259                 }
14260
14261                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
14262                 if (!hdr)
14263                         goto nla_put_failure;
14264
14265                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14266                     (freq &&
14267                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
14268                     (sig_dbm &&
14269                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
14270                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
14271                         goto nla_put_failure;
14272
14273                 genlmsg_end(msg, hdr);
14274
14275                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
14276         }
14277         spin_unlock_bh(&rdev->beacon_registrations_lock);
14278         return;
14279
14280  nla_put_failure:
14281         spin_unlock_bh(&rdev->beacon_registrations_lock);
14282         if (hdr)
14283                 genlmsg_cancel(msg, hdr);
14284         nlmsg_free(msg);
14285 }
14286 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
14287
14288 #ifdef CONFIG_PM
14289 static int cfg80211_net_detect_results(struct sk_buff *msg,
14290                                        struct cfg80211_wowlan_wakeup *wakeup)
14291 {
14292         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
14293         struct nlattr *nl_results, *nl_match, *nl_freqs;
14294         int i, j;
14295
14296         nl_results = nla_nest_start(
14297                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
14298         if (!nl_results)
14299                 return -EMSGSIZE;
14300
14301         for (i = 0; i < nd->n_matches; i++) {
14302                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
14303
14304                 nl_match = nla_nest_start(msg, i);
14305                 if (!nl_match)
14306                         break;
14307
14308                 /* The SSID attribute is optional in nl80211, but for
14309                  * simplicity reasons it's always present in the
14310                  * cfg80211 structure.  If a driver can't pass the
14311                  * SSID, that needs to be changed.  A zero length SSID
14312                  * is still a valid SSID (wildcard), so it cannot be
14313                  * used for this purpose.
14314                  */
14315                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
14316                             match->ssid.ssid)) {
14317                         nla_nest_cancel(msg, nl_match);
14318                         goto out;
14319                 }
14320
14321                 if (match->n_channels) {
14322                         nl_freqs = nla_nest_start(
14323                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
14324                         if (!nl_freqs) {
14325                                 nla_nest_cancel(msg, nl_match);
14326                                 goto out;
14327                         }
14328
14329                         for (j = 0; j < match->n_channels; j++) {
14330                                 if (nla_put_u32(msg, j, match->channels[j])) {
14331                                         nla_nest_cancel(msg, nl_freqs);
14332                                         nla_nest_cancel(msg, nl_match);
14333                                         goto out;
14334                                 }
14335                         }
14336
14337                         nla_nest_end(msg, nl_freqs);
14338                 }
14339
14340                 nla_nest_end(msg, nl_match);
14341         }
14342
14343 out:
14344         nla_nest_end(msg, nl_results);
14345         return 0;
14346 }
14347
14348 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
14349                                    struct cfg80211_wowlan_wakeup *wakeup,
14350                                    gfp_t gfp)
14351 {
14352         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14353         struct sk_buff *msg;
14354         void *hdr;
14355         int size = 200;
14356
14357         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
14358
14359         if (wakeup)
14360                 size += wakeup->packet_present_len;
14361
14362         msg = nlmsg_new(size, gfp);
14363         if (!msg)
14364                 return;
14365
14366         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
14367         if (!hdr)
14368                 goto free_msg;
14369
14370         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14371             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14372                               NL80211_ATTR_PAD))
14373                 goto free_msg;
14374
14375         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14376                                         wdev->netdev->ifindex))
14377                 goto free_msg;
14378
14379         if (wakeup) {
14380                 struct nlattr *reasons;
14381
14382                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
14383                 if (!reasons)
14384                         goto free_msg;
14385
14386                 if (wakeup->disconnect &&
14387                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
14388                         goto free_msg;
14389                 if (wakeup->magic_pkt &&
14390                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
14391                         goto free_msg;
14392                 if (wakeup->gtk_rekey_failure &&
14393                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
14394                         goto free_msg;
14395                 if (wakeup->eap_identity_req &&
14396                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
14397                         goto free_msg;
14398                 if (wakeup->four_way_handshake &&
14399                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
14400                         goto free_msg;
14401                 if (wakeup->rfkill_release &&
14402                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
14403                         goto free_msg;
14404
14405                 if (wakeup->pattern_idx >= 0 &&
14406                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
14407                                 wakeup->pattern_idx))
14408                         goto free_msg;
14409
14410                 if (wakeup->tcp_match &&
14411                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
14412                         goto free_msg;
14413
14414                 if (wakeup->tcp_connlost &&
14415                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
14416                         goto free_msg;
14417
14418                 if (wakeup->tcp_nomoretokens &&
14419                     nla_put_flag(msg,
14420                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
14421                         goto free_msg;
14422
14423                 if (wakeup->packet) {
14424                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
14425                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
14426
14427                         if (!wakeup->packet_80211) {
14428                                 pkt_attr =
14429                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
14430                                 len_attr =
14431                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
14432                         }
14433
14434                         if (wakeup->packet_len &&
14435                             nla_put_u32(msg, len_attr, wakeup->packet_len))
14436                                 goto free_msg;
14437
14438                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
14439                                     wakeup->packet))
14440                                 goto free_msg;
14441                 }
14442
14443                 if (wakeup->net_detect &&
14444                     cfg80211_net_detect_results(msg, wakeup))
14445                                 goto free_msg;
14446
14447                 nla_nest_end(msg, reasons);
14448         }
14449
14450         genlmsg_end(msg, hdr);
14451
14452         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14453                                 NL80211_MCGRP_MLME, gfp);
14454         return;
14455
14456  free_msg:
14457         nlmsg_free(msg);
14458 }
14459 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
14460 #endif
14461
14462 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
14463                                 enum nl80211_tdls_operation oper,
14464                                 u16 reason_code, gfp_t gfp)
14465 {
14466         struct wireless_dev *wdev = dev->ieee80211_ptr;
14467         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14468         struct sk_buff *msg;
14469         void *hdr;
14470
14471         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
14472                                          reason_code);
14473
14474         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14475         if (!msg)
14476                 return;
14477
14478         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
14479         if (!hdr) {
14480                 nlmsg_free(msg);
14481                 return;
14482         }
14483
14484         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14485             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14486             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
14487             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
14488             (reason_code > 0 &&
14489              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
14490                 goto nla_put_failure;
14491
14492         genlmsg_end(msg, hdr);
14493
14494         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14495                                 NL80211_MCGRP_MLME, gfp);
14496         return;
14497
14498  nla_put_failure:
14499         genlmsg_cancel(msg, hdr);
14500         nlmsg_free(msg);
14501 }
14502 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
14503
14504 static int nl80211_netlink_notify(struct notifier_block * nb,
14505                                   unsigned long state,
14506                                   void *_notify)
14507 {
14508         struct netlink_notify *notify = _notify;
14509         struct cfg80211_registered_device *rdev;
14510         struct wireless_dev *wdev;
14511         struct cfg80211_beacon_registration *reg, *tmp;
14512
14513         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
14514                 return NOTIFY_DONE;
14515
14516         rcu_read_lock();
14517
14518         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
14519                 bool schedule_destroy_work = false;
14520                 struct cfg80211_sched_scan_request *sched_scan_req =
14521                         rcu_dereference(rdev->sched_scan_req);
14522
14523                 if (sched_scan_req && notify->portid &&
14524                     sched_scan_req->owner_nlportid == notify->portid) {
14525                         sched_scan_req->owner_nlportid = 0;
14526
14527                         if (rdev->ops->sched_scan_stop &&
14528                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
14529                                 schedule_work(&rdev->sched_scan_stop_wk);
14530                 }
14531
14532                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
14533                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
14534
14535                         if (wdev->owner_nlportid == notify->portid)
14536                                 schedule_destroy_work = true;
14537                 }
14538
14539                 spin_lock_bh(&rdev->beacon_registrations_lock);
14540                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
14541                                          list) {
14542                         if (reg->nlportid == notify->portid) {
14543                                 list_del(&reg->list);
14544                                 kfree(reg);
14545                                 break;
14546                         }
14547                 }
14548                 spin_unlock_bh(&rdev->beacon_registrations_lock);
14549
14550                 if (schedule_destroy_work) {
14551                         struct cfg80211_iface_destroy *destroy;
14552
14553                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
14554                         if (destroy) {
14555                                 destroy->nlportid = notify->portid;
14556                                 spin_lock(&rdev->destroy_list_lock);
14557                                 list_add(&destroy->list, &rdev->destroy_list);
14558                                 spin_unlock(&rdev->destroy_list_lock);
14559                                 schedule_work(&rdev->destroy_work);
14560                         }
14561                 }
14562         }
14563
14564         rcu_read_unlock();
14565
14566         /*
14567          * It is possible that the user space process that is controlling the
14568          * indoor setting disappeared, so notify the regulatory core.
14569          */
14570         regulatory_netlink_notify(notify->portid);
14571         return NOTIFY_OK;
14572 }
14573
14574 static struct notifier_block nl80211_netlink_notifier = {
14575         .notifier_call = nl80211_netlink_notify,
14576 };
14577
14578 void cfg80211_ft_event(struct net_device *netdev,
14579                        struct cfg80211_ft_event_params *ft_event)
14580 {
14581         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
14582         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14583         struct sk_buff *msg;
14584         void *hdr;
14585
14586         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
14587
14588         if (!ft_event->target_ap)
14589                 return;
14590
14591         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
14592         if (!msg)
14593                 return;
14594
14595         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
14596         if (!hdr)
14597                 goto out;
14598
14599         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14600             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14601             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
14602                 goto out;
14603
14604         if (ft_event->ies &&
14605             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
14606                 goto out;
14607         if (ft_event->ric_ies &&
14608             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
14609                     ft_event->ric_ies))
14610                 goto out;
14611
14612         genlmsg_end(msg, hdr);
14613
14614         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14615                                 NL80211_MCGRP_MLME, GFP_KERNEL);
14616         return;
14617  out:
14618         nlmsg_free(msg);
14619 }
14620 EXPORT_SYMBOL(cfg80211_ft_event);
14621
14622 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
14623 {
14624         struct cfg80211_registered_device *rdev;
14625         struct sk_buff *msg;
14626         void *hdr;
14627         u32 nlportid;
14628
14629         rdev = wiphy_to_rdev(wdev->wiphy);
14630         if (!rdev->crit_proto_nlportid)
14631                 return;
14632
14633         nlportid = rdev->crit_proto_nlportid;
14634         rdev->crit_proto_nlportid = 0;
14635
14636         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14637         if (!msg)
14638                 return;
14639
14640         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
14641         if (!hdr)
14642                 goto nla_put_failure;
14643
14644         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14645             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14646                               NL80211_ATTR_PAD))
14647                 goto nla_put_failure;
14648
14649         genlmsg_end(msg, hdr);
14650
14651         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14652         return;
14653
14654  nla_put_failure:
14655         if (hdr)
14656                 genlmsg_cancel(msg, hdr);
14657         nlmsg_free(msg);
14658 }
14659 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
14660
14661 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
14662 {
14663         struct wiphy *wiphy = wdev->wiphy;
14664         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14665         struct sk_buff *msg;
14666         void *hdr;
14667
14668         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
14669         if (!msg)
14670                 return;
14671
14672         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
14673         if (!hdr)
14674                 goto out;
14675
14676         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14677             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
14678             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14679                               NL80211_ATTR_PAD))
14680                 goto out;
14681
14682         genlmsg_end(msg, hdr);
14683
14684         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
14685                                 NL80211_MCGRP_MLME, GFP_KERNEL);
14686         return;
14687  out:
14688         nlmsg_free(msg);
14689 }
14690
14691 /* initialisation/exit functions */
14692
14693 int __init nl80211_init(void)
14694 {
14695         int err;
14696
14697         err = genl_register_family(&nl80211_fam);
14698         if (err)
14699                 return err;
14700
14701         err = netlink_register_notifier(&nl80211_netlink_notifier);
14702         if (err)
14703                 goto err_out;
14704
14705         return 0;
14706  err_out:
14707         genl_unregister_family(&nl80211_fam);
14708         return err;
14709 }
14710
14711 void nl80211_exit(void)
14712 {
14713         netlink_unregister_notifier(&nl80211_netlink_notifier);
14714         genl_unregister_family(&nl80211_fam);
14715 }