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       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 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                             struct genl_info *info);
  37 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  38                               struct genl_info *info);
  39
  40 /* the netlink family */
  41 static struct genl_family nl80211_fam = {
  42         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  43         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  44         .hdrsize = 0,                   /* no private header */
  45         .version = 1,                   /* no particular meaning now */
  46         .maxattr = NL80211_ATTR_MAX,
  47         .netnsok = true,
  48         .pre_doit = nl80211_pre_doit,
  49         .post_doit = nl80211_post_doit,
  50 };
  51
  52 /* multicast groups */
  53 enum nl80211_multicast_groups {
  54         NL80211_MCGRP_CONFIG,
  55         NL80211_MCGRP_SCAN,
  56         NL80211_MCGRP_REGULATORY,
  57         NL80211_MCGRP_MLME,
  58         NL80211_MCGRP_VENDOR,
  59         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  60 };
  61
  62 static const struct genl_multicast_group nl80211_mcgrps[] = {
  63         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  64         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  65         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  66         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  67         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  68 #ifdef CONFIG_NL80211_TESTMODE
  69         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  70 #endif
  71 };
  72
  73 /* returns ERR_PTR values */
  74 static struct wireless_dev *
  75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  76 {
  77         struct cfg80211_registered_device *rdev;
  78         struct wireless_dev *result = NULL;
  79         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  80         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  81         u64 wdev_id;
  82         int wiphy_idx = -1;
  83         int ifidx = -1;
  84
  85         ASSERT_RTNL();
  86
  87         if (!have_ifidx && !have_wdev_id)
  88                 return ERR_PTR(-EINVAL);
  89
  90         if (have_ifidx)
  91                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  92         if (have_wdev_id) {
  93                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  94                 wiphy_idx = wdev_id >> 32;
  95         }
  96
  97         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  98                 struct wireless_dev *wdev;
  99
 100                 if (wiphy_net(&rdev->wiphy) != netns)
 101                         continue;
 102
 103                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 104                         continue;
 105
 106                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 107                         if (have_ifidx && wdev->netdev &&
 108                             wdev->netdev->ifindex == ifidx) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 113                                 result = wdev;
 114                                 break;
 115                         }
 116                 }
 117
 118                 if (result)
 119                         break;
 120         }
 121
 122         if (result)
 123                 return result;
 124         return ERR_PTR(-ENODEV);
 125 }
 126
 127 static struct cfg80211_registered_device *
 128 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 129 {
 130         struct cfg80211_registered_device *rdev = NULL, *tmp;
 131         struct net_device *netdev;
 132
 133         ASSERT_RTNL();
 134
 135         if (!attrs[NL80211_ATTR_WIPHY] &&
 136             !attrs[NL80211_ATTR_IFINDEX] &&
 137             !attrs[NL80211_ATTR_WDEV])
 138                 return ERR_PTR(-EINVAL);
 139
 140         if (attrs[NL80211_ATTR_WIPHY])
 141                 rdev = cfg80211_rdev_by_wiphy_idx(
 142                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 143
 144         if (attrs[NL80211_ATTR_WDEV]) {
 145                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 146                 struct wireless_dev *wdev;
 147                 bool found = false;
 148
 149                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 150                 if (tmp) {
 151                         /* make sure wdev exists */
 152                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 153                                 if (wdev->identifier != (u32)wdev_id)
 154                                         continue;
 155                                 found = true;
 156                                 break;
 157                         }
 158
 159                         if (!found)
 160                                 tmp = NULL;
 161
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164                         rdev = tmp;
 165                 }
 166         }
 167
 168         if (attrs[NL80211_ATTR_IFINDEX]) {
 169                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 170                 netdev = __dev_get_by_index(netns, ifindex);
 171                 if (netdev) {
 172                         if (netdev->ieee80211_ptr)
 173                                 tmp = wiphy_to_rdev(
 174                                         netdev->ieee80211_ptr->wiphy);
 175                         else
 176                                 tmp = NULL;
 177
 178                         /* not wireless device -- return error */
 179                         if (!tmp)
 180                                 return ERR_PTR(-EINVAL);
 181
 182                         /* mismatch -- return error */
 183                         if (rdev && tmp != rdev)
 184                                 return ERR_PTR(-EINVAL);
 185
 186                         rdev = tmp;
 187                 }
 188         }
 189
 190         if (!rdev)
 191                 return ERR_PTR(-ENODEV);
 192
 193         if (netns != wiphy_net(&rdev->wiphy))
 194                 return ERR_PTR(-ENODEV);
 195
 196         return rdev;
 197 }
 198
 199 /*
 200  * This function returns a pointer to the driver
 201  * that the genl_info item that is passed refers to.
 202  *
 203  * The result of this can be a PTR_ERR and hence must
 204  * be checked with IS_ERR() for errors.
 205  */
 206 static struct cfg80211_registered_device *
 207 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 208 {
 209         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 210 }
 211
 212 /* policy for the attributes */
 213 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 214         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 215         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 216                                       .len = 20-1 },
 217         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 218
 219         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 220         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 223         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 224
 225         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 226         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 227         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 230         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 231
 232         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 234         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 235
 236         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 237         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 238
 239         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 240         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 241                                     .len = WLAN_MAX_KEY_LEN },
 242         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 243         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 244         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 245         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 246         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 247
 248         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 249         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 250         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 251                                        .len = IEEE80211_MAX_DATA_LEN },
 252         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 253                                        .len = IEEE80211_MAX_DATA_LEN },
 254         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 255         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 256         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 257         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 258                                                .len = NL80211_MAX_SUPP_RATES },
 259         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 260         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 261         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 262         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 263                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 264         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 265
 266         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 267         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 268
 269         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 270         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 273                                            .len = NL80211_MAX_SUPP_RATES },
 274         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 275
 276         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 277         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 278
 279         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 280
 281         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 282         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 283                               .len = IEEE80211_MAX_DATA_LEN },
 284         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 286
 287         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 288                                 .len = IEEE80211_MAX_SSID_LEN },
 289         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 290         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 291         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 292         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 293         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 294         [NL80211_ATTR_STA_FLAGS2] = {
 295                 .len = sizeof(struct nl80211_sta_flag_update),
 296         },
 297         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 298         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 303         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 304         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 305         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 306                                  .len = WLAN_PMKID_LEN },
 307         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 308         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 309         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 310         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 311                                  .len = IEEE80211_MAX_DATA_LEN },
 312         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 313         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 314         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 315         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 317         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 318         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 319         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 320         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 321         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 322         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 323         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 325         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 327         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 328         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 329         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 330         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 331         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 332                                          .len = IEEE80211_MAX_DATA_LEN },
 333         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 334                                          .len = IEEE80211_MAX_DATA_LEN },
 335         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 336         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 338         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 339         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 342         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 346                                       .len = IEEE80211_MAX_DATA_LEN },
 347         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 350                 .len = NL80211_HT_CAPABILITY_LEN
 351         },
 352         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 353         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 354         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 355         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 356         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 357         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 358         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 359         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 360         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 361         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 362         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 363         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 364         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 365         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 366         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 367         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 368         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 369                 .len = NL80211_VHT_CAPABILITY_LEN,
 370         },
 371         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 372         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 373                                   .len = IEEE80211_MAX_DATA_LEN },
 374         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 375         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 376         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 377         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 378         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 379         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 382         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 383         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 384         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 385         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 386         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 387         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 388                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 389         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 390         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 391         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 392         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 393         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 394         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 395         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 396         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 397         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 398         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 399         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 400         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 401         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 402         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 403         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 404 };
 405
 406 /* policy for the key attributes */
 407 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 408         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 409         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 410         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 411         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 412         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 413         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 414         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 415         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 416 };
 417
 418 /* policy for the key default flags */
 419 static const struct nla_policy
 420 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 421         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 422         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 423 };
 424
 425 /* policy for WoWLAN attributes */
 426 static const struct nla_policy
 427 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 428         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 429         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 430         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 431         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 432         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 433         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 434         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 435         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 436         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 437         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 438 };
 439
 440 static const struct nla_policy
 441 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 442         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 443         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 444         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 445         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 446         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 447         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 448         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 449                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 450         },
 451         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 452                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 453         },
 454         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 455         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 456         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 457 };
 458
 459 /* policy for coalesce rule attributes */
 460 static const struct nla_policy
 461 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 462         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 463         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 464         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 465 };
 466
 467 /* policy for GTK rekey offload attributes */
 468 static const struct nla_policy
 469 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 470         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 471         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 472         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 473 };
 474
 475 static const struct nla_policy
 476 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 477         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 478                                                  .len = IEEE80211_MAX_SSID_LEN },
 479         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 480 };
 481
 482 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 483                                      struct netlink_callback *cb,
 484                                      struct cfg80211_registered_device **rdev,
 485                                      struct wireless_dev **wdev)
 486 {
 487         int err;
 488
 489         rtnl_lock();
 490
 491         if (!cb->args[0]) {
 492                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 493                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 494                                   nl80211_policy);
 495                 if (err)
 496                         goto out_unlock;
 497
 498                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 499                                                    nl80211_fam.attrbuf);
 500                 if (IS_ERR(*wdev)) {
 501                         err = PTR_ERR(*wdev);
 502                         goto out_unlock;
 503                 }
 504                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 505                 /* 0 is the first index - add 1 to parse only once */
 506                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 507                 cb->args[1] = (*wdev)->identifier;
 508         } else {
 509                 /* subtract the 1 again here */
 510                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 511                 struct wireless_dev *tmp;
 512
 513                 if (!wiphy) {
 514                         err = -ENODEV;
 515                         goto out_unlock;
 516                 }
 517                 *rdev = wiphy_to_rdev(wiphy);
 518                 *wdev = NULL;
 519
 520                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 521                         if (tmp->identifier == cb->args[1]) {
 522                                 *wdev = tmp;
 523                                 break;
 524                         }
 525                 }
 526
 527                 if (!*wdev) {
 528                         err = -ENODEV;
 529                         goto out_unlock;
 530                 }
 531         }
 532
 533         return 0;
 534  out_unlock:
 535         rtnl_unlock();
 536         return err;
 537 }
 538
 539 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 540 {
 541         rtnl_unlock();
 542 }
 543
 544 /* IE validation */
 545 static bool is_valid_ie_attr(const struct nlattr *attr)
 546 {
 547         const u8 *pos;
 548         int len;
 549
 550         if (!attr)
 551                 return true;
 552
 553         pos = nla_data(attr);
 554         len = nla_len(attr);
 555
 556         while (len) {
 557                 u8 elemlen;
 558
 559                 if (len < 2)
 560                         return false;
 561                 len -= 2;
 562
 563                 elemlen = pos[1];
 564                 if (elemlen > len)
 565                         return false;
 566
 567                 len -= elemlen;
 568                 pos += 2 + elemlen;
 569         }
 570
 571         return true;
 572 }
 573
 574 /* message building helper */
 575 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 576                                    int flags, u8 cmd)
 577 {
 578         /* since there is no private header just add the generic one */
 579         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 580 }
 581
 582 static int nl80211_msg_put_channel(struct sk_buff *msg,
 583                                    struct ieee80211_channel *chan,
 584                                    bool large)
 585 {
 586         /* Some channels must be completely excluded from the
 587          * list to protect old user-space tools from breaking
 588          */
 589         if (!large && chan->flags &
 590             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 591                 return 0;
 592
 593         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 594                         chan->center_freq))
 595                 goto nla_put_failure;
 596
 597         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 598             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 599                 goto nla_put_failure;
 600         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 601                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 602                         goto nla_put_failure;
 603                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 604                         goto nla_put_failure;
 605         }
 606         if (chan->flags & IEEE80211_CHAN_RADAR) {
 607                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 608                         goto nla_put_failure;
 609                 if (large) {
 610                         u32 time;
 611
 612                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 613
 614                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 615                                         chan->dfs_state))
 616                                 goto nla_put_failure;
 617                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 618                                         time))
 619                                 goto nla_put_failure;
 620                         if (nla_put_u32(msg,
 621                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 622                                         chan->dfs_cac_ms))
 623                                 goto nla_put_failure;
 624                 }
 625         }
 626
 627         if (large) {
 628                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 629                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 630                         goto nla_put_failure;
 631                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 632                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 633                         goto nla_put_failure;
 634                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 635                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 636                         goto nla_put_failure;
 637                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 638                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 639                         goto nla_put_failure;
 640                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 641                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 642                         goto nla_put_failure;
 643                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 644                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 645                         goto nla_put_failure;
 646                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 647                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 648                         goto nla_put_failure;
 649                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 650                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 651                         goto nla_put_failure;
 652         }
 653
 654         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 655                         DBM_TO_MBM(chan->max_power)))
 656                 goto nla_put_failure;
 657
 658         return 0;
 659
 660  nla_put_failure:
 661         return -ENOBUFS;
 662 }
 663
 664 /* netlink command implementations */
 665
 666 struct key_parse {
 667         struct key_params p;
 668         int idx;
 669         int type;
 670         bool def, defmgmt;
 671         bool def_uni, def_multi;
 672 };
 673
 674 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 675 {
 676         struct nlattr *tb[NL80211_KEY_MAX + 1];
 677         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 678                                    nl80211_key_policy);
 679         if (err)
 680                 return err;
 681
 682         k->def = !!tb[NL80211_KEY_DEFAULT];
 683         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 684
 685         if (k->def) {
 686                 k->def_uni = true;
 687                 k->def_multi = true;
 688         }
 689         if (k->defmgmt)
 690                 k->def_multi = true;
 691
 692         if (tb[NL80211_KEY_IDX])
 693                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 694
 695         if (tb[NL80211_KEY_DATA]) {
 696                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 697                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 698         }
 699
 700         if (tb[NL80211_KEY_SEQ]) {
 701                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 702                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 703         }
 704
 705         if (tb[NL80211_KEY_CIPHER])
 706                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 707
 708         if (tb[NL80211_KEY_TYPE]) {
 709                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 710                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 711                         return -EINVAL;
 712         }
 713
 714         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 715                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 716                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 717                                        tb[NL80211_KEY_DEFAULT_TYPES],
 718                                        nl80211_key_default_policy);
 719                 if (err)
 720                         return err;
 721
 722                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 723                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 724         }
 725
 726         return 0;
 727 }
 728
 729 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 730 {
 731         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 732                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 733                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 734         }
 735
 736         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 737                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 738                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 739         }
 740
 741         if (info->attrs[NL80211_ATTR_KEY_IDX])
 742                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 743
 744         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 745                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 746
 747         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 748         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 749
 750         if (k->def) {
 751                 k->def_uni = true;
 752                 k->def_multi = true;
 753         }
 754         if (k->defmgmt)
 755                 k->def_multi = true;
 756
 757         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 758                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 759                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 760                         return -EINVAL;
 761         }
 762
 763         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 764                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 765                 int err = nla_parse_nested(
 766                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 767                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 768                                 nl80211_key_default_policy);
 769                 if (err)
 770                         return err;
 771
 772                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 773                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 774         }
 775
 776         return 0;
 777 }
 778
 779 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 780 {
 781         int err;
 782
 783         memset(k, 0, sizeof(*k));
 784         k->idx = -1;
 785         k->type = -1;
 786
 787         if (info->attrs[NL80211_ATTR_KEY])
 788                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 789         else
 790                 err = nl80211_parse_key_old(info, k);
 791
 792         if (err)
 793                 return err;
 794
 795         if (k->def && k->defmgmt)
 796                 return -EINVAL;
 797
 798         if (k->defmgmt) {
 799                 if (k->def_uni || !k->def_multi)
 800                         return -EINVAL;
 801         }
 802
 803         if (k->idx != -1) {
 804                 if (k->defmgmt) {
 805                         if (k->idx < 4 || k->idx > 5)
 806                                 return -EINVAL;
 807                 } else if (k->def) {
 808                         if (k->idx < 0 || k->idx > 3)
 809                                 return -EINVAL;
 810                 } else {
 811                         if (k->idx < 0 || k->idx > 5)
 812                                 return -EINVAL;
 813                 }
 814         }
 815
 816         return 0;
 817 }
 818
 819 static struct cfg80211_cached_keys *
 820 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 821                        struct nlattr *keys, bool *no_ht)
 822 {
 823         struct key_parse parse;
 824         struct nlattr *key;
 825         struct cfg80211_cached_keys *result;
 826         int rem, err, def = 0;
 827
 828         result = kzalloc(sizeof(*result), GFP_KERNEL);
 829         if (!result)
 830                 return ERR_PTR(-ENOMEM);
 831
 832         result->def = -1;
 833         result->defmgmt = -1;
 834
 835         nla_for_each_nested(key, keys, rem) {
 836                 memset(&parse, 0, sizeof(parse));
 837                 parse.idx = -1;
 838
 839                 err = nl80211_parse_key_new(key, &parse);
 840                 if (err)
 841                         goto error;
 842                 err = -EINVAL;
 843                 if (!parse.p.key)
 844                         goto error;
 845                 if (parse.idx < 0 || parse.idx > 4)
 846                         goto error;
 847                 if (parse.def) {
 848                         if (def)
 849                                 goto error;
 850                         def = 1;
 851                         result->def = parse.idx;
 852                         if (!parse.def_uni || !parse.def_multi)
 853                                 goto error;
 854                 } else if (parse.defmgmt)
 855                         goto error;
 856                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 857                                                      parse.idx, false, NULL);
 858                 if (err)
 859                         goto error;
 860                 result->params[parse.idx].cipher = parse.p.cipher;
 861                 result->params[parse.idx].key_len = parse.p.key_len;
 862                 result->params[parse.idx].key = result->data[parse.idx];
 863                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 864
 865                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 866                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 867                         if (no_ht)
 868                                 *no_ht = true;
 869                 }
 870         }
 871
 872         return result;
 873  error:
 874         kfree(result);
 875         return ERR_PTR(err);
 876 }
 877
 878 static int nl80211_key_allowed(struct wireless_dev *wdev)
 879 {
 880         ASSERT_WDEV_LOCK(wdev);
 881
 882         switch (wdev->iftype) {
 883         case NL80211_IFTYPE_AP:
 884         case NL80211_IFTYPE_AP_VLAN:
 885         case NL80211_IFTYPE_P2P_GO:
 886         case NL80211_IFTYPE_MESH_POINT:
 887                 break;
 888         case NL80211_IFTYPE_ADHOC:
 889         case NL80211_IFTYPE_STATION:
 890         case NL80211_IFTYPE_P2P_CLIENT:
 891                 if (!wdev->current_bss)
 892                         return -ENOLINK;
 893                 break;
 894         case NL80211_IFTYPE_UNSPECIFIED:
 895         case NL80211_IFTYPE_OCB:
 896         case NL80211_IFTYPE_MONITOR:
 897         case NL80211_IFTYPE_P2P_DEVICE:
 898         case NL80211_IFTYPE_WDS:
 899         case NUM_NL80211_IFTYPES:
 900                 return -EINVAL;
 901         }
 902
 903         return 0;
 904 }
 905
 906 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 907                                                         struct nlattr *tb)
 908 {
 909         struct ieee80211_channel *chan;
 910
 911         if (tb == NULL)
 912                 return NULL;
 913         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 914         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 915                 return NULL;
 916         return chan;
 917 }
 918
 919 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 920 {
 921         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 922         int i;
 923
 924         if (!nl_modes)
 925                 goto nla_put_failure;
 926
 927         i = 0;
 928         while (ifmodes) {
 929                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 930                         goto nla_put_failure;
 931                 ifmodes >>= 1;
 932                 i++;
 933         }
 934
 935         nla_nest_end(msg, nl_modes);
 936         return 0;
 937
 938 nla_put_failure:
 939         return -ENOBUFS;
 940 }
 941
 942 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 943                                           struct sk_buff *msg,
 944                                           bool large)
 945 {
 946         struct nlattr *nl_combis;
 947         int i, j;
 948
 949         nl_combis = nla_nest_start(msg,
 950                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 951         if (!nl_combis)
 952                 goto nla_put_failure;
 953
 954         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 955                 const struct ieee80211_iface_combination *c;
 956                 struct nlattr *nl_combi, *nl_limits;
 957
 958                 c = &wiphy->iface_combinations[i];
 959
 960                 nl_combi = nla_nest_start(msg, i + 1);
 961                 if (!nl_combi)
 962                         goto nla_put_failure;
 963
 964                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 965                 if (!nl_limits)
 966                         goto nla_put_failure;
 967
 968                 for (j = 0; j < c->n_limits; j++) {
 969                         struct nlattr *nl_limit;
 970
 971                         nl_limit = nla_nest_start(msg, j + 1);
 972                         if (!nl_limit)
 973                                 goto nla_put_failure;
 974                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 975                                         c->limits[j].max))
 976                                 goto nla_put_failure;
 977                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 978                                                 c->limits[j].types))
 979                                 goto nla_put_failure;
 980                         nla_nest_end(msg, nl_limit);
 981                 }
 982
 983                 nla_nest_end(msg, nl_limits);
 984
 985                 if (c->beacon_int_infra_match &&
 986                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 987                         goto nla_put_failure;
 988                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 989                                 c->num_different_channels) ||
 990                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 991                                 c->max_interfaces))
 992                         goto nla_put_failure;
 993                 if (large &&
 994                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 995                                 c->radar_detect_widths) ||
 996                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
 997                                 c->radar_detect_regions)))
 998                         goto nla_put_failure;
 999
1000                 nla_nest_end(msg, nl_combi);
1001         }
1002
1003         nla_nest_end(msg, nl_combis);
1004
1005         return 0;
1006 nla_put_failure:
1007         return -ENOBUFS;
1008 }
1009
1010 #ifdef CONFIG_PM
1011 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1012                                         struct sk_buff *msg)
1013 {
1014         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1015         struct nlattr *nl_tcp;
1016
1017         if (!tcp)
1018                 return 0;
1019
1020         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1021         if (!nl_tcp)
1022                 return -ENOBUFS;
1023
1024         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1025                         tcp->data_payload_max))
1026                 return -ENOBUFS;
1027
1028         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1029                         tcp->data_payload_max))
1030                 return -ENOBUFS;
1031
1032         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1033                 return -ENOBUFS;
1034
1035         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1036                                 sizeof(*tcp->tok), tcp->tok))
1037                 return -ENOBUFS;
1038
1039         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1040                         tcp->data_interval_max))
1041                 return -ENOBUFS;
1042
1043         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1044                         tcp->wake_payload_max))
1045                 return -ENOBUFS;
1046
1047         nla_nest_end(msg, nl_tcp);
1048         return 0;
1049 }
1050
1051 static int nl80211_send_wowlan(struct sk_buff *msg,
1052                                struct cfg80211_registered_device *rdev,
1053                                bool large)
1054 {
1055         struct nlattr *nl_wowlan;
1056
1057         if (!rdev->wiphy.wowlan)
1058                 return 0;
1059
1060         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1061         if (!nl_wowlan)
1062                 return -ENOBUFS;
1063
1064         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1065              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1066             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1067              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1068             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1069              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1070             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1071              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1072             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1073              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1074             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1075              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1076             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1077              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1078             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1079              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1080                 return -ENOBUFS;
1081
1082         if (rdev->wiphy.wowlan->n_patterns) {
1083                 struct nl80211_pattern_support pat = {
1084                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1085                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1086                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1087                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1088                 };
1089
1090                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1091                             sizeof(pat), &pat))
1092                         return -ENOBUFS;
1093         }
1094
1095         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1096             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1097                         rdev->wiphy.wowlan->max_nd_match_sets))
1098                 return -ENOBUFS;
1099
1100         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1101                 return -ENOBUFS;
1102
1103         nla_nest_end(msg, nl_wowlan);
1104
1105         return 0;
1106 }
1107 #endif
1108
1109 static int nl80211_send_coalesce(struct sk_buff *msg,
1110                                  struct cfg80211_registered_device *rdev)
1111 {
1112         struct nl80211_coalesce_rule_support rule;
1113
1114         if (!rdev->wiphy.coalesce)
1115                 return 0;
1116
1117         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1118         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1119         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1120         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1121         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1122         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1123
1124         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1125                 return -ENOBUFS;
1126
1127         return 0;
1128 }
1129
1130 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1131                                       struct ieee80211_supported_band *sband)
1132 {
1133         struct nlattr *nl_rates, *nl_rate;
1134         struct ieee80211_rate *rate;
1135         int i;
1136
1137         /* add HT info */
1138         if (sband->ht_cap.ht_supported &&
1139             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1140                      sizeof(sband->ht_cap.mcs),
1141                      &sband->ht_cap.mcs) ||
1142              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1143                          sband->ht_cap.cap) ||
1144              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1145                         sband->ht_cap.ampdu_factor) ||
1146              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1147                         sband->ht_cap.ampdu_density)))
1148                 return -ENOBUFS;
1149
1150         /* add VHT info */
1151         if (sband->vht_cap.vht_supported &&
1152             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1153                      sizeof(sband->vht_cap.vht_mcs),
1154                      &sband->vht_cap.vht_mcs) ||
1155              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1156                          sband->vht_cap.cap)))
1157                 return -ENOBUFS;
1158
1159         /* add bitrates */
1160         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1161         if (!nl_rates)
1162                 return -ENOBUFS;
1163
1164         for (i = 0; i < sband->n_bitrates; i++) {
1165                 nl_rate = nla_nest_start(msg, i);
1166                 if (!nl_rate)
1167                         return -ENOBUFS;
1168
1169                 rate = &sband->bitrates[i];
1170                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1171                                 rate->bitrate))
1172                         return -ENOBUFS;
1173                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1174                     nla_put_flag(msg,
1175                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1176                         return -ENOBUFS;
1177
1178                 nla_nest_end(msg, nl_rate);
1179         }
1180
1181         nla_nest_end(msg, nl_rates);
1182
1183         return 0;
1184 }
1185
1186 static int
1187 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1188                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1189 {
1190         u16 stypes;
1191         struct nlattr *nl_ftypes, *nl_ifs;
1192         enum nl80211_iftype ift;
1193         int i;
1194
1195         if (!mgmt_stypes)
1196                 return 0;
1197
1198         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1199         if (!nl_ifs)
1200                 return -ENOBUFS;
1201
1202         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1203                 nl_ftypes = nla_nest_start(msg, ift);
1204                 if (!nl_ftypes)
1205                         return -ENOBUFS;
1206                 i = 0;
1207                 stypes = mgmt_stypes[ift].tx;
1208                 while (stypes) {
1209                         if ((stypes & 1) &&
1210                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1211                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1212                                 return -ENOBUFS;
1213                         stypes >>= 1;
1214                         i++;
1215                 }
1216                 nla_nest_end(msg, nl_ftypes);
1217         }
1218
1219         nla_nest_end(msg, nl_ifs);
1220
1221         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1222         if (!nl_ifs)
1223                 return -ENOBUFS;
1224
1225         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1226                 nl_ftypes = nla_nest_start(msg, ift);
1227                 if (!nl_ftypes)
1228                         return -ENOBUFS;
1229                 i = 0;
1230                 stypes = mgmt_stypes[ift].rx;
1231                 while (stypes) {
1232                         if ((stypes & 1) &&
1233                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1234                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1235                                 return -ENOBUFS;
1236                         stypes >>= 1;
1237                         i++;
1238                 }
1239                 nla_nest_end(msg, nl_ftypes);
1240         }
1241         nla_nest_end(msg, nl_ifs);
1242
1243         return 0;
1244 }
1245
1246 struct nl80211_dump_wiphy_state {
1247         s64 filter_wiphy;
1248         long start;
1249         long split_start, band_start, chan_start;
1250         bool split;
1251 };
1252
1253 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1254                               enum nl80211_commands cmd,
1255                               struct sk_buff *msg, u32 portid, u32 seq,
1256                               int flags, struct nl80211_dump_wiphy_state *state)
1257 {
1258         void *hdr;
1259         struct nlattr *nl_bands, *nl_band;
1260         struct nlattr *nl_freqs, *nl_freq;
1261         struct nlattr *nl_cmds;
1262         enum ieee80211_band band;
1263         struct ieee80211_channel *chan;
1264         int i;
1265         const struct ieee80211_txrx_stypes *mgmt_stypes =
1266                                 rdev->wiphy.mgmt_stypes;
1267         u32 features;
1268
1269         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1270         if (!hdr)
1271                 return -ENOBUFS;
1272
1273         if (WARN_ON(!state))
1274                 return -EINVAL;
1275
1276         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1277             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1278                            wiphy_name(&rdev->wiphy)) ||
1279             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1280                         cfg80211_rdev_list_generation))
1281                 goto nla_put_failure;
1282
1283         if (cmd != NL80211_CMD_NEW_WIPHY)
1284                 goto finish;
1285
1286         switch (state->split_start) {
1287         case 0:
1288                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1289                                rdev->wiphy.retry_short) ||
1290                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1291                                rdev->wiphy.retry_long) ||
1292                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1293                                 rdev->wiphy.frag_threshold) ||
1294                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1295                                 rdev->wiphy.rts_threshold) ||
1296                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1297                                rdev->wiphy.coverage_class) ||
1298                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1299                                rdev->wiphy.max_scan_ssids) ||
1300                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1301                                rdev->wiphy.max_sched_scan_ssids) ||
1302                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1303                                 rdev->wiphy.max_scan_ie_len) ||
1304                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1305                                 rdev->wiphy.max_sched_scan_ie_len) ||
1306                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1307                                rdev->wiphy.max_match_sets))
1308                         goto nla_put_failure;
1309
1310                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1311                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1312                         goto nla_put_failure;
1313                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1314                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1315                         goto nla_put_failure;
1316                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1317                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1318                         goto nla_put_failure;
1319                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1320                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1321                         goto nla_put_failure;
1322                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1323                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1324                         goto nla_put_failure;
1325                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1326                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1327                         goto nla_put_failure;
1328                 state->split_start++;
1329                 if (state->split)
1330                         break;
1331         case 1:
1332                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1333                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1334                             rdev->wiphy.cipher_suites))
1335                         goto nla_put_failure;
1336
1337                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1338                                rdev->wiphy.max_num_pmkids))
1339                         goto nla_put_failure;
1340
1341                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1342                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1343                         goto nla_put_failure;
1344
1345                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1346                                 rdev->wiphy.available_antennas_tx) ||
1347                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1348                                 rdev->wiphy.available_antennas_rx))
1349                         goto nla_put_failure;
1350
1351                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1352                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1353                                 rdev->wiphy.probe_resp_offload))
1354                         goto nla_put_failure;
1355
1356                 if ((rdev->wiphy.available_antennas_tx ||
1357                      rdev->wiphy.available_antennas_rx) &&
1358                     rdev->ops->get_antenna) {
1359                         u32 tx_ant = 0, rx_ant = 0;
1360                         int res;
1361                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1362                         if (!res) {
1363                                 if (nla_put_u32(msg,
1364                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1365                                                 tx_ant) ||
1366                                     nla_put_u32(msg,
1367                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1368                                                 rx_ant))
1369                                         goto nla_put_failure;
1370                         }
1371                 }
1372
1373                 state->split_start++;
1374                 if (state->split)
1375                         break;
1376         case 2:
1377                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1378                                         rdev->wiphy.interface_modes))
1379                                 goto nla_put_failure;
1380                 state->split_start++;
1381                 if (state->split)
1382                         break;
1383         case 3:
1384                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1385                 if (!nl_bands)
1386                         goto nla_put_failure;
1387
1388                 for (band = state->band_start;
1389                      band < IEEE80211_NUM_BANDS; band++) {
1390                         struct ieee80211_supported_band *sband;
1391
1392                         sband = rdev->wiphy.bands[band];
1393
1394                         if (!sband)
1395                                 continue;
1396
1397                         nl_band = nla_nest_start(msg, band);
1398                         if (!nl_band)
1399                                 goto nla_put_failure;
1400
1401                         switch (state->chan_start) {
1402                         case 0:
1403                                 if (nl80211_send_band_rateinfo(msg, sband))
1404                                         goto nla_put_failure;
1405                                 state->chan_start++;
1406                                 if (state->split)
1407                                         break;
1408                         default:
1409                                 /* add frequencies */
1410                                 nl_freqs = nla_nest_start(
1411                                         msg, NL80211_BAND_ATTR_FREQS);
1412                                 if (!nl_freqs)
1413                                         goto nla_put_failure;
1414
1415                                 for (i = state->chan_start - 1;
1416                                      i < sband->n_channels;
1417                                      i++) {
1418                                         nl_freq = nla_nest_start(msg, i);
1419                                         if (!nl_freq)
1420                                                 goto nla_put_failure;
1421
1422                                         chan = &sband->channels[i];
1423
1424                                         if (nl80211_msg_put_channel(
1425                                                         msg, chan,
1426                                                         state->split))
1427                                                 goto nla_put_failure;
1428
1429                                         nla_nest_end(msg, nl_freq);
1430                                         if (state->split)
1431                                                 break;
1432                                 }
1433                                 if (i < sband->n_channels)
1434                                         state->chan_start = i + 2;
1435                                 else
1436                                         state->chan_start = 0;
1437                                 nla_nest_end(msg, nl_freqs);
1438                         }
1439
1440                         nla_nest_end(msg, nl_band);
1441
1442                         if (state->split) {
1443                                 /* start again here */
1444                                 if (state->chan_start)
1445                                         band--;
1446                                 break;
1447                         }
1448                 }
1449                 nla_nest_end(msg, nl_bands);
1450
1451                 if (band < IEEE80211_NUM_BANDS)
1452                         state->band_start = band + 1;
1453                 else
1454                         state->band_start = 0;
1455
1456                 /* if bands & channels are done, continue outside */
1457                 if (state->band_start == 0 && state->chan_start == 0)
1458                         state->split_start++;
1459                 if (state->split)
1460                         break;
1461         case 4:
1462                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1463                 if (!nl_cmds)
1464                         goto nla_put_failure;
1465
1466                 i = 0;
1467 #define CMD(op, n)                                                      \
1468                  do {                                                   \
1469                         if (rdev->ops->op) {                            \
1470                                 i++;                                    \
1471                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1472                                         goto nla_put_failure;           \
1473                         }                                               \
1474                 } while (0)
1475
1476                 CMD(add_virtual_intf, NEW_INTERFACE);
1477                 CMD(change_virtual_intf, SET_INTERFACE);
1478                 CMD(add_key, NEW_KEY);
1479                 CMD(start_ap, START_AP);
1480                 CMD(add_station, NEW_STATION);
1481                 CMD(add_mpath, NEW_MPATH);
1482                 CMD(update_mesh_config, SET_MESH_CONFIG);
1483                 CMD(change_bss, SET_BSS);
1484                 CMD(auth, AUTHENTICATE);
1485                 CMD(assoc, ASSOCIATE);
1486                 CMD(deauth, DEAUTHENTICATE);
1487                 CMD(disassoc, DISASSOCIATE);
1488                 CMD(join_ibss, JOIN_IBSS);
1489                 CMD(join_mesh, JOIN_MESH);
1490                 CMD(set_pmksa, SET_PMKSA);
1491                 CMD(del_pmksa, DEL_PMKSA);
1492                 CMD(flush_pmksa, FLUSH_PMKSA);
1493                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1494                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1495                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1496                 CMD(mgmt_tx, FRAME);
1497                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1498                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1499                         i++;
1500                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1501                                 goto nla_put_failure;
1502                 }
1503                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1504                     rdev->ops->join_mesh) {
1505                         i++;
1506                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1507                                 goto nla_put_failure;
1508                 }
1509                 CMD(set_wds_peer, SET_WDS_PEER);
1510                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1511                         CMD(tdls_mgmt, TDLS_MGMT);
1512                         CMD(tdls_oper, TDLS_OPER);
1513                 }
1514                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1515                         CMD(sched_scan_start, START_SCHED_SCAN);
1516                 CMD(probe_client, PROBE_CLIENT);
1517                 CMD(set_noack_map, SET_NOACK_MAP);
1518                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1519                         i++;
1520                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1521                                 goto nla_put_failure;
1522                 }
1523                 CMD(start_p2p_device, START_P2P_DEVICE);
1524                 CMD(set_mcast_rate, SET_MCAST_RATE);
1525 #ifdef CONFIG_NL80211_TESTMODE
1526                 CMD(testmode_cmd, TESTMODE);
1527 #endif
1528                 if (state->split) {
1529                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1530                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1531                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1532                                 CMD(channel_switch, CHANNEL_SWITCH);
1533                         CMD(set_qos_map, SET_QOS_MAP);
1534                         if (rdev->wiphy.features &
1535                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1536                                 CMD(add_tx_ts, ADD_TX_TS);
1537                 }
1538                 /* add into the if now */
1539 #undef CMD
1540
1541                 if (rdev->ops->connect || rdev->ops->auth) {
1542                         i++;
1543                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1544                                 goto nla_put_failure;
1545                 }
1546
1547                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1548                         i++;
1549                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1550                                 goto nla_put_failure;
1551                 }
1552
1553                 nla_nest_end(msg, nl_cmds);
1554                 state->split_start++;
1555                 if (state->split)
1556                         break;
1557         case 5:
1558                 if (rdev->ops->remain_on_channel &&
1559                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1560                     nla_put_u32(msg,
1561                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1562                                 rdev->wiphy.max_remain_on_channel_duration))
1563                         goto nla_put_failure;
1564
1565                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1566                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1567                         goto nla_put_failure;
1568
1569                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1570                         goto nla_put_failure;
1571                 state->split_start++;
1572                 if (state->split)
1573                         break;
1574         case 6:
1575 #ifdef CONFIG_PM
1576                 if (nl80211_send_wowlan(msg, rdev, state->split))
1577                         goto nla_put_failure;
1578                 state->split_start++;
1579                 if (state->split)
1580                         break;
1581 #else
1582                 state->split_start++;
1583 #endif
1584         case 7:
1585                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1586                                         rdev->wiphy.software_iftypes))
1587                         goto nla_put_failure;
1588
1589                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1590                                                    state->split))
1591                         goto nla_put_failure;
1592
1593                 state->split_start++;
1594                 if (state->split)
1595                         break;
1596         case 8:
1597                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1598                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1599                                 rdev->wiphy.ap_sme_capa))
1600                         goto nla_put_failure;
1601
1602                 features = rdev->wiphy.features;
1603                 /*
1604                  * We can only add the per-channel limit information if the
1605                  * dump is split, otherwise it makes it too big. Therefore
1606                  * only advertise it in that case.
1607                  */
1608                 if (state->split)
1609                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1610                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1611                         goto nla_put_failure;
1612
1613                 if (rdev->wiphy.ht_capa_mod_mask &&
1614                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1615                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1616                             rdev->wiphy.ht_capa_mod_mask))
1617                         goto nla_put_failure;
1618
1619                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1620                     rdev->wiphy.max_acl_mac_addrs &&
1621                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1622                                 rdev->wiphy.max_acl_mac_addrs))
1623                         goto nla_put_failure;
1624
1625                 /*
1626                  * Any information below this point is only available to
1627                  * applications that can deal with it being split. This
1628                  * helps ensure that newly added capabilities don't break
1629                  * older tools by overrunning their buffers.
1630                  *
1631                  * We still increment split_start so that in the split
1632                  * case we'll continue with more data in the next round,
1633                  * but break unconditionally so unsplit data stops here.
1634                  */
1635                 state->split_start++;
1636                 break;
1637         case 9:
1638                 if (rdev->wiphy.extended_capabilities &&
1639                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1640                              rdev->wiphy.extended_capabilities_len,
1641                              rdev->wiphy.extended_capabilities) ||
1642                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1643                              rdev->wiphy.extended_capabilities_len,
1644                              rdev->wiphy.extended_capabilities_mask)))
1645                         goto nla_put_failure;
1646
1647                 if (rdev->wiphy.vht_capa_mod_mask &&
1648                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1649                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1650                             rdev->wiphy.vht_capa_mod_mask))
1651                         goto nla_put_failure;
1652
1653                 state->split_start++;
1654                 break;
1655         case 10:
1656                 if (nl80211_send_coalesce(msg, rdev))
1657                         goto nla_put_failure;
1658
1659                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1660                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1661                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1662                         goto nla_put_failure;
1663
1664                 if (rdev->wiphy.max_ap_assoc_sta &&
1665                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1666                                 rdev->wiphy.max_ap_assoc_sta))
1667                         goto nla_put_failure;
1668
1669                 state->split_start++;
1670                 break;
1671         case 11:
1672                 if (rdev->wiphy.n_vendor_commands) {
1673                         const struct nl80211_vendor_cmd_info *info;
1674                         struct nlattr *nested;
1675
1676                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1677                         if (!nested)
1678                                 goto nla_put_failure;
1679
1680                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1681                                 info = &rdev->wiphy.vendor_commands[i].info;
1682                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1683                                         goto nla_put_failure;
1684                         }
1685                         nla_nest_end(msg, nested);
1686                 }
1687
1688                 if (rdev->wiphy.n_vendor_events) {
1689                         const struct nl80211_vendor_cmd_info *info;
1690                         struct nlattr *nested;
1691
1692                         nested = nla_nest_start(msg,
1693                                                 NL80211_ATTR_VENDOR_EVENTS);
1694                         if (!nested)
1695                                 goto nla_put_failure;
1696
1697                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1698                                 info = &rdev->wiphy.vendor_events[i];
1699                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1700                                         goto nla_put_failure;
1701                         }
1702                         nla_nest_end(msg, nested);
1703                 }
1704                 state->split_start++;
1705                 break;
1706         case 12:
1707                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1708                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1709                                rdev->wiphy.max_num_csa_counters))
1710                         goto nla_put_failure;
1711
1712                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1713                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1714                         goto nla_put_failure;
1715
1716                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1717                             sizeof(rdev->wiphy.ext_features),
1718                             rdev->wiphy.ext_features))
1719                         goto nla_put_failure;
1720
1721                 /* done */
1722                 state->split_start = 0;
1723                 break;
1724         }
1725  finish:
1726         genlmsg_end(msg, hdr);
1727         return 0;
1728
1729  nla_put_failure:
1730         genlmsg_cancel(msg, hdr);
1731         return -EMSGSIZE;
1732 }
1733
1734 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1735                                     struct netlink_callback *cb,
1736                                     struct nl80211_dump_wiphy_state *state)
1737 {
1738         struct nlattr **tb = nl80211_fam.attrbuf;
1739         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1740                               tb, nl80211_fam.maxattr, nl80211_policy);
1741         /* ignore parse errors for backward compatibility */
1742         if (ret)
1743                 return 0;
1744
1745         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1746         if (tb[NL80211_ATTR_WIPHY])
1747                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1748         if (tb[NL80211_ATTR_WDEV])
1749                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1750         if (tb[NL80211_ATTR_IFINDEX]) {
1751                 struct net_device *netdev;
1752                 struct cfg80211_registered_device *rdev;
1753                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1754
1755                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1756                 if (!netdev)
1757                         return -ENODEV;
1758                 if (netdev->ieee80211_ptr) {
1759                         rdev = wiphy_to_rdev(
1760                                 netdev->ieee80211_ptr->wiphy);
1761                         state->filter_wiphy = rdev->wiphy_idx;
1762                 }
1763         }
1764
1765         return 0;
1766 }
1767
1768 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1769 {
1770         int idx = 0, ret;
1771         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1772         struct cfg80211_registered_device *rdev;
1773
1774         rtnl_lock();
1775         if (!state) {
1776                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1777                 if (!state) {
1778                         rtnl_unlock();
1779                         return -ENOMEM;
1780                 }
1781                 state->filter_wiphy = -1;
1782                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1783                 if (ret) {
1784                         kfree(state);
1785                         rtnl_unlock();
1786                         return ret;
1787                 }
1788                 cb->args[0] = (long)state;
1789         }
1790
1791         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1792                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1793                         continue;
1794                 if (++idx <= state->start)
1795                         continue;
1796                 if (state->filter_wiphy != -1 &&
1797                     state->filter_wiphy != rdev->wiphy_idx)
1798                         continue;
1799                 /* attempt to fit multiple wiphy data chunks into the skb */
1800                 do {
1801                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1802                                                  skb,
1803                                                  NETLINK_CB(cb->skb).portid,
1804                                                  cb->nlh->nlmsg_seq,
1805                                                  NLM_F_MULTI, state);
1806                         if (ret < 0) {
1807                                 /*
1808                                  * If sending the wiphy data didn't fit (ENOBUFS
1809                                  * or EMSGSIZE returned), this SKB is still
1810                                  * empty (so it's not too big because another
1811                                  * wiphy dataset is already in the skb) and
1812                                  * we've not tried to adjust the dump allocation
1813                                  * yet ... then adjust the alloc size to be
1814                                  * bigger, and return 1 but with the empty skb.
1815                                  * This results in an empty message being RX'ed
1816                                  * in userspace, but that is ignored.
1817                                  *
1818                                  * We can then retry with the larger buffer.
1819                                  */
1820                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1821                                     !skb->len && !state->split &&
1822                                     cb->min_dump_alloc < 4096) {
1823                                         cb->min_dump_alloc = 4096;
1824                                         state->split_start = 0;
1825                                         rtnl_unlock();
1826                                         return 1;
1827                                 }
1828                                 idx--;
1829                                 break;
1830                         }
1831                 } while (state->split_start > 0);
1832                 break;
1833         }
1834         rtnl_unlock();
1835
1836         state->start = idx;
1837
1838         return skb->len;
1839 }
1840
1841 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1842 {
1843         kfree((void *)cb->args[0]);
1844         return 0;
1845 }
1846
1847 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1848 {
1849         struct sk_buff *msg;
1850         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1851         struct nl80211_dump_wiphy_state state = {};
1852
1853         msg = nlmsg_new(4096, GFP_KERNEL);
1854         if (!msg)
1855                 return -ENOMEM;
1856
1857         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1858                                info->snd_portid, info->snd_seq, 0,
1859                                &state) < 0) {
1860                 nlmsg_free(msg);
1861                 return -ENOBUFS;
1862         }
1863
1864         return genlmsg_reply(msg, info);
1865 }
1866
1867 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1868         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1869         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1870         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1871         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1872         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1873 };
1874
1875 static int parse_txq_params(struct nlattr *tb[],
1876                             struct ieee80211_txq_params *txq_params)
1877 {
1878         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1879             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1880             !tb[NL80211_TXQ_ATTR_AIFS])
1881                 return -EINVAL;
1882
1883         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1884         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1885         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1886         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1887         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1888
1889         if (txq_params->ac >= NL80211_NUM_ACS)
1890                 return -EINVAL;
1891
1892         return 0;
1893 }
1894
1895 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1896 {
1897         /*
1898          * You can only set the channel explicitly for WDS interfaces,
1899          * all others have their channel managed via their respective
1900          * "establish a connection" command (connect, join, ...)
1901          *
1902          * For AP/GO and mesh mode, the channel can be set with the
1903          * channel userspace API, but is only stored and passed to the
1904          * low-level driver when the AP starts or the mesh is joined.
1905          * This is for backward compatibility, userspace can also give
1906          * the channel in the start-ap or join-mesh commands instead.
1907          *
1908          * Monitors are special as they are normally slaved to
1909          * whatever else is going on, so they have their own special
1910          * operation to set the monitor channel if possible.
1911          */
1912         return !wdev ||
1913                 wdev->iftype == NL80211_IFTYPE_AP ||
1914                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1915                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1916                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1917 }
1918
1919 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1920                                  struct genl_info *info,
1921                                  struct cfg80211_chan_def *chandef)
1922 {
1923         u32 control_freq;
1924
1925         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1926                 return -EINVAL;
1927
1928         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1929
1930         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1931         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1932         chandef->center_freq1 = control_freq;
1933         chandef->center_freq2 = 0;
1934
1935         /* Primary channel not allowed */
1936         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1937                 return -EINVAL;
1938
1939         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1940                 enum nl80211_channel_type chantype;
1941
1942                 chantype = nla_get_u32(
1943                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1944
1945                 switch (chantype) {
1946                 case NL80211_CHAN_NO_HT:
1947                 case NL80211_CHAN_HT20:
1948                 case NL80211_CHAN_HT40PLUS:
1949                 case NL80211_CHAN_HT40MINUS:
1950                         cfg80211_chandef_create(chandef, chandef->chan,
1951                                                 chantype);
1952                         break;
1953                 default:
1954                         return -EINVAL;
1955                 }
1956         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1957                 chandef->width =
1958                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1959                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1960                         chandef->center_freq1 =
1961                                 nla_get_u32(
1962                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1963                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1964                         chandef->center_freq2 =
1965                                 nla_get_u32(
1966                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1967         }
1968
1969         if (!cfg80211_chandef_valid(chandef))
1970                 return -EINVAL;
1971
1972         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1973                                      IEEE80211_CHAN_DISABLED))
1974                 return -EINVAL;
1975
1976         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1977              chandef->width == NL80211_CHAN_WIDTH_10) &&
1978             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1979                 return -EINVAL;
1980
1981         return 0;
1982 }
1983
1984 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1985                                  struct net_device *dev,
1986                                  struct genl_info *info)
1987 {
1988         struct cfg80211_chan_def chandef;
1989         int result;
1990         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1991         struct wireless_dev *wdev = NULL;
1992
1993         if (dev)
1994                 wdev = dev->ieee80211_ptr;
1995         if (!nl80211_can_set_dev_channel(wdev))
1996                 return -EOPNOTSUPP;
1997         if (wdev)
1998                 iftype = wdev->iftype;
1999
2000         result = nl80211_parse_chandef(rdev, info, &chandef);
2001         if (result)
2002                 return result;
2003
2004         switch (iftype) {
2005         case NL80211_IFTYPE_AP:
2006         case NL80211_IFTYPE_P2P_GO:
2007                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2008                                                    iftype)) {
2009                         result = -EINVAL;
2010                         break;
2011                 }
2012                 if (wdev->beacon_interval) {
2013                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2014                             !(rdev->wiphy.features &
2015                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2016                                 result = -EBUSY;
2017                                 break;
2018                         }
2019
2020                         /* Only allow dynamic channel width changes */
2021                         if (chandef.chan != wdev->preset_chandef.chan) {
2022                                 result = -EBUSY;
2023                                 break;
2024                         }
2025                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2026                         if (result)
2027                                 break;
2028                 }
2029                 wdev->preset_chandef = chandef;
2030                 result = 0;
2031                 break;
2032         case NL80211_IFTYPE_MESH_POINT:
2033                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2034                 break;
2035         case NL80211_IFTYPE_MONITOR:
2036                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2037                 break;
2038         default:
2039                 result = -EINVAL;
2040         }
2041
2042         return result;
2043 }
2044
2045 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2046 {
2047         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2048         struct net_device *netdev = info->user_ptr[1];
2049
2050         return __nl80211_set_channel(rdev, netdev, info);
2051 }
2052
2053 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2054 {
2055         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2056         struct net_device *dev = info->user_ptr[1];
2057         struct wireless_dev *wdev = dev->ieee80211_ptr;
2058         const u8 *bssid;
2059
2060         if (!info->attrs[NL80211_ATTR_MAC])
2061                 return -EINVAL;
2062
2063         if (netif_running(dev))
2064                 return -EBUSY;
2065
2066         if (!rdev->ops->set_wds_peer)
2067                 return -EOPNOTSUPP;
2068
2069         if (wdev->iftype != NL80211_IFTYPE_WDS)
2070                 return -EOPNOTSUPP;
2071
2072         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2073         return rdev_set_wds_peer(rdev, dev, bssid);
2074 }
2075
2076
2077 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2078 {
2079         struct cfg80211_registered_device *rdev;
2080         struct net_device *netdev = NULL;
2081         struct wireless_dev *wdev;
2082         int result = 0, rem_txq_params = 0;
2083         struct nlattr *nl_txq_params;
2084         u32 changed;
2085         u8 retry_short = 0, retry_long = 0;
2086         u32 frag_threshold = 0, rts_threshold = 0;
2087         u8 coverage_class = 0;
2088
2089         ASSERT_RTNL();
2090
2091         /*
2092          * Try to find the wiphy and netdev. Normally this
2093          * function shouldn't need the netdev, but this is
2094          * done for backward compatibility -- previously
2095          * setting the channel was done per wiphy, but now
2096          * it is per netdev. Previous userland like hostapd
2097          * also passed a netdev to set_wiphy, so that it is
2098          * possible to let that go to the right netdev!
2099          */
2100
2101         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2102                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2103
2104                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2105                 if (netdev && netdev->ieee80211_ptr)
2106                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2107                 else
2108                         netdev = NULL;
2109         }
2110
2111         if (!netdev) {
2112                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2113                                                   info->attrs);
2114                 if (IS_ERR(rdev))
2115                         return PTR_ERR(rdev);
2116                 wdev = NULL;
2117                 netdev = NULL;
2118                 result = 0;
2119         } else
2120                 wdev = netdev->ieee80211_ptr;
2121
2122         /*
2123          * end workaround code, by now the rdev is available
2124          * and locked, and wdev may or may not be NULL.
2125          */
2126
2127         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2128                 result = cfg80211_dev_rename(
2129                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2130
2131         if (result)
2132                 return result;
2133
2134         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2135                 struct ieee80211_txq_params txq_params;
2136                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2137
2138                 if (!rdev->ops->set_txq_params)
2139                         return -EOPNOTSUPP;
2140
2141                 if (!netdev)
2142                         return -EINVAL;
2143
2144                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2145                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2146                         return -EINVAL;
2147
2148                 if (!netif_running(netdev))
2149                         return -ENETDOWN;
2150
2151                 nla_for_each_nested(nl_txq_params,
2152                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2153                                     rem_txq_params) {
2154                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2155                                            nla_data(nl_txq_params),
2156                                            nla_len(nl_txq_params),
2157                                            txq_params_policy);
2158                         if (result)
2159                                 return result;
2160                         result = parse_txq_params(tb, &txq_params);
2161                         if (result)
2162                                 return result;
2163
2164                         result = rdev_set_txq_params(rdev, netdev,
2165                                                      &txq_params);
2166                         if (result)
2167                                 return result;
2168                 }
2169         }
2170
2171         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2172                 result = __nl80211_set_channel(
2173                         rdev,
2174                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2175                         info);
2176                 if (result)
2177                         return result;
2178         }
2179
2180         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2181                 struct wireless_dev *txp_wdev = wdev;
2182                 enum nl80211_tx_power_setting type;
2183                 int idx, mbm = 0;
2184
2185                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2186                         txp_wdev = NULL;
2187
2188                 if (!rdev->ops->set_tx_power)
2189                         return -EOPNOTSUPP;
2190
2191                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2192                 type = nla_get_u32(info->attrs[idx]);
2193
2194                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2195                     (type != NL80211_TX_POWER_AUTOMATIC))
2196                         return -EINVAL;
2197
2198                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2199                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2200                         mbm = nla_get_u32(info->attrs[idx]);
2201                 }
2202
2203                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2204                 if (result)
2205                         return result;
2206         }
2207
2208         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2209             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2210                 u32 tx_ant, rx_ant;
2211                 if ((!rdev->wiphy.available_antennas_tx &&
2212                      !rdev->wiphy.available_antennas_rx) ||
2213                     !rdev->ops->set_antenna)
2214                         return -EOPNOTSUPP;
2215
2216                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2217                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2218
2219                 /* reject antenna configurations which don't match the
2220                  * available antenna masks, except for the "all" mask */
2221                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2222                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2223                         return -EINVAL;
2224
2225                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2226                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2227
2228                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2229                 if (result)
2230                         return result;
2231         }
2232
2233         changed = 0;
2234
2235         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2236                 retry_short = nla_get_u8(
2237                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2238                 if (retry_short == 0)
2239                         return -EINVAL;
2240
2241                 changed |= WIPHY_PARAM_RETRY_SHORT;
2242         }
2243
2244         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2245                 retry_long = nla_get_u8(
2246                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2247                 if (retry_long == 0)
2248                         return -EINVAL;
2249
2250                 changed |= WIPHY_PARAM_RETRY_LONG;
2251         }
2252
2253         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2254                 frag_threshold = nla_get_u32(
2255                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2256                 if (frag_threshold < 256)
2257                         return -EINVAL;
2258
2259                 if (frag_threshold != (u32) -1) {
2260                         /*
2261                          * Fragments (apart from the last one) are required to
2262                          * have even length. Make the fragmentation code
2263                          * simpler by stripping LSB should someone try to use
2264                          * odd threshold value.
2265                          */
2266                         frag_threshold &= ~0x1;
2267                 }
2268                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2269         }
2270
2271         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2272                 rts_threshold = nla_get_u32(
2273                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2274                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2275         }
2276
2277         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2278                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2279                         return -EINVAL;
2280
2281                 coverage_class = nla_get_u8(
2282                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2283                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2284         }
2285
2286         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2287                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2288                         return -EOPNOTSUPP;
2289
2290                 changed |= WIPHY_PARAM_DYN_ACK;
2291         }
2292
2293         if (changed) {
2294                 u8 old_retry_short, old_retry_long;
2295                 u32 old_frag_threshold, old_rts_threshold;
2296                 u8 old_coverage_class;
2297
2298                 if (!rdev->ops->set_wiphy_params)
2299                         return -EOPNOTSUPP;
2300
2301                 old_retry_short = rdev->wiphy.retry_short;
2302                 old_retry_long = rdev->wiphy.retry_long;
2303                 old_frag_threshold = rdev->wiphy.frag_threshold;
2304                 old_rts_threshold = rdev->wiphy.rts_threshold;
2305                 old_coverage_class = rdev->wiphy.coverage_class;
2306
2307                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2308                         rdev->wiphy.retry_short = retry_short;
2309                 if (changed & WIPHY_PARAM_RETRY_LONG)
2310                         rdev->wiphy.retry_long = retry_long;
2311                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2312                         rdev->wiphy.frag_threshold = frag_threshold;
2313                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2314                         rdev->wiphy.rts_threshold = rts_threshold;
2315                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2316                         rdev->wiphy.coverage_class = coverage_class;
2317
2318                 result = rdev_set_wiphy_params(rdev, changed);
2319                 if (result) {
2320                         rdev->wiphy.retry_short = old_retry_short;
2321                         rdev->wiphy.retry_long = old_retry_long;
2322                         rdev->wiphy.frag_threshold = old_frag_threshold;
2323                         rdev->wiphy.rts_threshold = old_rts_threshold;
2324                         rdev->wiphy.coverage_class = old_coverage_class;
2325                         return result;
2326                 }
2327         }
2328         return 0;
2329 }
2330
2331 static inline u64 wdev_id(struct wireless_dev *wdev)
2332 {
2333         return (u64)wdev->identifier |
2334                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2335 }
2336
2337 static int nl80211_send_chandef(struct sk_buff *msg,
2338                                 const struct cfg80211_chan_def *chandef)
2339 {
2340         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2341                 return -EINVAL;
2342
2343         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2344                         chandef->chan->center_freq))
2345                 return -ENOBUFS;
2346         switch (chandef->width) {
2347         case NL80211_CHAN_WIDTH_20_NOHT:
2348         case NL80211_CHAN_WIDTH_20:
2349         case NL80211_CHAN_WIDTH_40:
2350                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2351                                 cfg80211_get_chandef_type(chandef)))
2352                         return -ENOBUFS;
2353                 break;
2354         default:
2355                 break;
2356         }
2357         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2358                 return -ENOBUFS;
2359         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2360                 return -ENOBUFS;
2361         if (chandef->center_freq2 &&
2362             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2363                 return -ENOBUFS;
2364         return 0;
2365 }
2366
2367 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2368                               struct cfg80211_registered_device *rdev,
2369                               struct wireless_dev *wdev, bool removal)
2370 {
2371         struct net_device *dev = wdev->netdev;
2372         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2373         void *hdr;
2374
2375         if (removal)
2376                 cmd = NL80211_CMD_DEL_INTERFACE;
2377
2378         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2379         if (!hdr)
2380                 return -1;
2381
2382         if (dev &&
2383             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2384              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2385                 goto nla_put_failure;
2386
2387         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2388             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2389             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2390             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2391             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2392                         rdev->devlist_generation ^
2393                         (cfg80211_rdev_list_generation << 2)))
2394                 goto nla_put_failure;
2395
2396         if (rdev->ops->get_channel) {
2397                 int ret;
2398                 struct cfg80211_chan_def chandef;
2399
2400                 ret = rdev_get_channel(rdev, wdev, &chandef);
2401                 if (ret == 0) {
2402                         if (nl80211_send_chandef(msg, &chandef))
2403                                 goto nla_put_failure;
2404                 }
2405         }
2406
2407         if (rdev->ops->get_tx_power) {
2408                 int dbm, ret;
2409
2410                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2411                 if (ret == 0 &&
2412                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2413                                 DBM_TO_MBM(dbm)))
2414                         goto nla_put_failure;
2415         }
2416
2417         if (wdev->ssid_len) {
2418                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2419                         goto nla_put_failure;
2420         }
2421
2422         genlmsg_end(msg, hdr);
2423         return 0;
2424
2425  nla_put_failure:
2426         genlmsg_cancel(msg, hdr);
2427         return -EMSGSIZE;
2428 }
2429
2430 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2431 {
2432         int wp_idx = 0;
2433         int if_idx = 0;
2434         int wp_start = cb->args[0];
2435         int if_start = cb->args[1];
2436         struct cfg80211_registered_device *rdev;
2437         struct wireless_dev *wdev;
2438
2439         rtnl_lock();
2440         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2441                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2442                         continue;
2443                 if (wp_idx < wp_start) {
2444                         wp_idx++;
2445                         continue;
2446                 }
2447                 if_idx = 0;
2448
2449                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2450                         if (if_idx < if_start) {
2451                                 if_idx++;
2452                                 continue;
2453                         }
2454                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2455                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2456                                                rdev, wdev, false) < 0) {
2457                                 goto out;
2458                         }
2459                         if_idx++;
2460                 }
2461
2462                 wp_idx++;
2463         }
2464  out:
2465         rtnl_unlock();
2466
2467         cb->args[0] = wp_idx;
2468         cb->args[1] = if_idx;
2469
2470         return skb->len;
2471 }
2472
2473 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2474 {
2475         struct sk_buff *msg;
2476         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2477         struct wireless_dev *wdev = info->user_ptr[1];
2478
2479         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2480         if (!msg)
2481                 return -ENOMEM;
2482
2483         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2484                                rdev, wdev, false) < 0) {
2485                 nlmsg_free(msg);
2486                 return -ENOBUFS;
2487         }
2488
2489         return genlmsg_reply(msg, info);
2490 }
2491
2492 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2493         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2494         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2495         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2496         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2497         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2498         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2499 };
2500
2501 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2502 {
2503         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2504         int flag;
2505
2506         *mntrflags = 0;
2507
2508         if (!nla)
2509                 return -EINVAL;
2510
2511         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2512                              nla, mntr_flags_policy))
2513                 return -EINVAL;
2514
2515         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2516                 if (flags[flag])
2517                         *mntrflags |= (1<<flag);
2518
2519         return 0;
2520 }
2521
2522 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2523                                struct net_device *netdev, u8 use_4addr,
2524                                enum nl80211_iftype iftype)
2525 {
2526         if (!use_4addr) {
2527                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2528                         return -EBUSY;
2529                 return 0;
2530         }
2531
2532         switch (iftype) {
2533         case NL80211_IFTYPE_AP_VLAN:
2534                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2535                         return 0;
2536                 break;
2537         case NL80211_IFTYPE_STATION:
2538                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2539                         return 0;
2540                 break;
2541         default:
2542                 break;
2543         }
2544
2545         return -EOPNOTSUPP;
2546 }
2547
2548 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2549 {
2550         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2551         struct vif_params params;
2552         int err;
2553         enum nl80211_iftype otype, ntype;
2554         struct net_device *dev = info->user_ptr[1];
2555         u32 _flags, *flags = NULL;
2556         bool change = false;
2557
2558         memset(&params, 0, sizeof(params));
2559
2560         otype = ntype = dev->ieee80211_ptr->iftype;
2561
2562         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2563                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2564                 if (otype != ntype)
2565                         change = true;
2566                 if (ntype > NL80211_IFTYPE_MAX)
2567                         return -EINVAL;
2568         }
2569
2570         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2571                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2572
2573                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2574                         return -EINVAL;
2575                 if (netif_running(dev))
2576                         return -EBUSY;
2577
2578                 wdev_lock(wdev);
2579                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2580                              IEEE80211_MAX_MESH_ID_LEN);
2581                 wdev->mesh_id_up_len =
2582                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2583                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2584                        wdev->mesh_id_up_len);
2585                 wdev_unlock(wdev);
2586         }
2587
2588         if (info->attrs[NL80211_ATTR_4ADDR]) {
2589                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2590                 change = true;
2591                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2592                 if (err)
2593                         return err;
2594         } else {
2595                 params.use_4addr = -1;
2596         }
2597
2598         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2599                 if (ntype != NL80211_IFTYPE_MONITOR)
2600                         return -EINVAL;
2601                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2602                                           &_flags);
2603                 if (err)
2604                         return err;
2605
2606                 flags = &_flags;
2607                 change = true;
2608         }
2609
2610         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2611             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2612                 return -EOPNOTSUPP;
2613
2614         if (change)
2615                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2616         else
2617                 err = 0;
2618
2619         if (!err && params.use_4addr != -1)
2620                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2621
2622         return err;
2623 }
2624
2625 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2626 {
2627         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2628         struct vif_params params;
2629         struct wireless_dev *wdev;
2630         struct sk_buff *msg, *event;
2631         int err;
2632         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2633         u32 flags;
2634
2635         /* to avoid failing a new interface creation due to pending removal */
2636         cfg80211_destroy_ifaces(rdev);
2637
2638         memset(&params, 0, sizeof(params));
2639
2640         if (!info->attrs[NL80211_ATTR_IFNAME])
2641                 return -EINVAL;
2642
2643         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2644                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2645                 if (type > NL80211_IFTYPE_MAX)
2646                         return -EINVAL;
2647         }
2648
2649         if (!rdev->ops->add_virtual_intf ||
2650             !(rdev->wiphy.interface_modes & (1 << type)))
2651                 return -EOPNOTSUPP;
2652
2653         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2654              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2655             info->attrs[NL80211_ATTR_MAC]) {
2656                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2657                            ETH_ALEN);
2658                 if (!is_valid_ether_addr(params.macaddr))
2659                         return -EADDRNOTAVAIL;
2660         }
2661
2662         if (info->attrs[NL80211_ATTR_4ADDR]) {
2663                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2664                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2665                 if (err)
2666                         return err;
2667         }
2668
2669         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2670                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2671                                   &flags);
2672
2673         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2674             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2675                 return -EOPNOTSUPP;
2676
2677         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2678         if (!msg)
2679                 return -ENOMEM;
2680
2681         wdev = rdev_add_virtual_intf(rdev,
2682                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2683                                 NET_NAME_USER, type, err ? NULL : &flags,
2684                                 &params);
2685         if (WARN_ON(!wdev)) {
2686                 nlmsg_free(msg);
2687                 return -EPROTO;
2688         } else if (IS_ERR(wdev)) {
2689                 nlmsg_free(msg);
2690                 return PTR_ERR(wdev);
2691         }
2692
2693         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2694                 wdev->owner_nlportid = info->snd_portid;
2695
2696         switch (type) {
2697         case NL80211_IFTYPE_MESH_POINT:
2698                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2699                         break;
2700                 wdev_lock(wdev);
2701                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2702                              IEEE80211_MAX_MESH_ID_LEN);
2703                 wdev->mesh_id_up_len =
2704                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2705                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2706                        wdev->mesh_id_up_len);
2707                 wdev_unlock(wdev);
2708                 break;
2709         case NL80211_IFTYPE_P2P_DEVICE:
2710                 /*
2711                  * P2P Device doesn't have a netdev, so doesn't go
2712                  * through the netdev notifier and must be added here
2713                  */
2714                 mutex_init(&wdev->mtx);
2715                 INIT_LIST_HEAD(&wdev->event_list);
2716                 spin_lock_init(&wdev->event_lock);
2717                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2718                 spin_lock_init(&wdev->mgmt_registrations_lock);
2719
2720                 wdev->identifier = ++rdev->wdev_id;
2721                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2722                 rdev->devlist_generation++;
2723                 break;
2724         default:
2725                 break;
2726         }
2727
2728         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2729                                rdev, wdev, false) < 0) {
2730                 nlmsg_free(msg);
2731                 return -ENOBUFS;
2732         }
2733
2734         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2735         if (event) {
2736                 if (nl80211_send_iface(event, 0, 0, 0,
2737                                        rdev, wdev, false) < 0) {
2738                         nlmsg_free(event);
2739                         goto out;
2740                 }
2741
2742                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2743                                         event, 0, NL80211_MCGRP_CONFIG,
2744                                         GFP_KERNEL);
2745         }
2746
2747 out:
2748         return genlmsg_reply(msg, info);
2749 }
2750
2751 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2752 {
2753         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2754         struct wireless_dev *wdev = info->user_ptr[1];
2755         struct sk_buff *msg;
2756         int status;
2757
2758         if (!rdev->ops->del_virtual_intf)
2759                 return -EOPNOTSUPP;
2760
2761         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2762         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2763                 nlmsg_free(msg);
2764                 msg = NULL;
2765         }
2766
2767         /*
2768          * If we remove a wireless device without a netdev then clear
2769          * user_ptr[1] so that nl80211_post_doit won't dereference it
2770          * to check if it needs to do dev_put(). Otherwise it crashes
2771          * since the wdev has been freed, unlike with a netdev where
2772          * we need the dev_put() for the netdev to really be freed.
2773          */
2774         if (!wdev->netdev)
2775                 info->user_ptr[1] = NULL;
2776
2777         status = rdev_del_virtual_intf(rdev, wdev);
2778         if (status >= 0 && msg)
2779                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2780                                         msg, 0, NL80211_MCGRP_CONFIG,
2781                                         GFP_KERNEL);
2782         else
2783                 nlmsg_free(msg);
2784
2785         return status;
2786 }
2787
2788 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2789 {
2790         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2791         struct net_device *dev = info->user_ptr[1];
2792         u16 noack_map;
2793
2794         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2795                 return -EINVAL;
2796
2797         if (!rdev->ops->set_noack_map)
2798                 return -EOPNOTSUPP;
2799
2800         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2801
2802         return rdev_set_noack_map(rdev, dev, noack_map);
2803 }
2804
2805 struct get_key_cookie {
2806         struct sk_buff *msg;
2807         int error;
2808         int idx;
2809 };
2810
2811 static void get_key_callback(void *c, struct key_params *params)
2812 {
2813         struct nlattr *key;
2814         struct get_key_cookie *cookie = c;
2815
2816         if ((params->key &&
2817              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2818                      params->key_len, params->key)) ||
2819             (params->seq &&
2820              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2821                      params->seq_len, params->seq)) ||
2822             (params->cipher &&
2823              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2824                          params->cipher)))
2825                 goto nla_put_failure;
2826
2827         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2828         if (!key)
2829                 goto nla_put_failure;
2830
2831         if ((params->key &&
2832              nla_put(cookie->msg, NL80211_KEY_DATA,
2833                      params->key_len, params->key)) ||
2834             (params->seq &&
2835              nla_put(cookie->msg, NL80211_KEY_SEQ,
2836                      params->seq_len, params->seq)) ||
2837             (params->cipher &&
2838              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2839                          params->cipher)))
2840                 goto nla_put_failure;
2841
2842         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2843                 goto nla_put_failure;
2844
2845         nla_nest_end(cookie->msg, key);
2846
2847         return;
2848  nla_put_failure:
2849         cookie->error = 1;
2850 }
2851
2852 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2853 {
2854         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2855         int err;
2856         struct net_device *dev = info->user_ptr[1];
2857         u8 key_idx = 0;
2858         const u8 *mac_addr = NULL;
2859         bool pairwise;
2860         struct get_key_cookie cookie = {
2861                 .error = 0,
2862         };
2863         void *hdr;
2864         struct sk_buff *msg;
2865
2866         if (info->attrs[NL80211_ATTR_KEY_IDX])
2867                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2868
2869         if (key_idx > 5)
2870                 return -EINVAL;
2871
2872         if (info->attrs[NL80211_ATTR_MAC])
2873                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2874
2875         pairwise = !!mac_addr;
2876         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2877                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2878                 if (kt >= NUM_NL80211_KEYTYPES)
2879                         return -EINVAL;
2880                 if (kt != NL80211_KEYTYPE_GROUP &&
2881                     kt != NL80211_KEYTYPE_PAIRWISE)
2882                         return -EINVAL;
2883                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2884         }
2885
2886         if (!rdev->ops->get_key)
2887                 return -EOPNOTSUPP;
2888
2889         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2890                 return -ENOENT;
2891
2892         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2893         if (!msg)
2894                 return -ENOMEM;
2895
2896         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2897                              NL80211_CMD_NEW_KEY);
2898         if (!hdr)
2899                 goto nla_put_failure;
2900
2901         cookie.msg = msg;
2902         cookie.idx = key_idx;
2903
2904         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2905             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2906                 goto nla_put_failure;
2907         if (mac_addr &&
2908             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2909                 goto nla_put_failure;
2910
2911         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2912                            get_key_callback);
2913
2914         if (err)
2915                 goto free_msg;
2916
2917         if (cookie.error)
2918                 goto nla_put_failure;
2919
2920         genlmsg_end(msg, hdr);
2921         return genlmsg_reply(msg, info);
2922
2923  nla_put_failure:
2924         err = -ENOBUFS;
2925  free_msg:
2926         nlmsg_free(msg);
2927         return err;
2928 }
2929
2930 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2931 {
2932         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2933         struct key_parse key;
2934         int err;
2935         struct net_device *dev = info->user_ptr[1];
2936
2937         err = nl80211_parse_key(info, &key);
2938         if (err)
2939                 return err;
2940
2941         if (key.idx < 0)
2942                 return -EINVAL;
2943
2944         /* only support setting default key */
2945         if (!key.def && !key.defmgmt)
2946                 return -EINVAL;
2947
2948         wdev_lock(dev->ieee80211_ptr);
2949
2950         if (key.def) {
2951                 if (!rdev->ops->set_default_key) {
2952                         err = -EOPNOTSUPP;
2953                         goto out;
2954                 }
2955
2956                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2957                 if (err)
2958                         goto out;
2959
2960                 err = rdev_set_default_key(rdev, dev, key.idx,
2961                                                  key.def_uni, key.def_multi);
2962
2963                 if (err)
2964                         goto out;
2965
2966 #ifdef CONFIG_CFG80211_WEXT
2967                 dev->ieee80211_ptr->wext.default_key = key.idx;
2968 #endif
2969         } else {
2970                 if (key.def_uni || !key.def_multi) {
2971                         err = -EINVAL;
2972                         goto out;
2973                 }
2974
2975                 if (!rdev->ops->set_default_mgmt_key) {
2976                         err = -EOPNOTSUPP;
2977                         goto out;
2978                 }
2979
2980                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2981                 if (err)
2982                         goto out;
2983
2984                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2985                 if (err)
2986                         goto out;
2987
2988 #ifdef CONFIG_CFG80211_WEXT
2989                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2990 #endif
2991         }
2992
2993  out:
2994         wdev_unlock(dev->ieee80211_ptr);
2995
2996         return err;
2997 }
2998
2999 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3000 {
3001         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3002         int err;
3003         struct net_device *dev = info->user_ptr[1];
3004         struct key_parse key;
3005         const u8 *mac_addr = NULL;
3006
3007         err = nl80211_parse_key(info, &key);
3008         if (err)
3009                 return err;
3010
3011         if (!key.p.key)
3012                 return -EINVAL;
3013
3014         if (info->attrs[NL80211_ATTR_MAC])
3015                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3016
3017         if (key.type == -1) {
3018                 if (mac_addr)
3019                         key.type = NL80211_KEYTYPE_PAIRWISE;
3020                 else
3021                         key.type = NL80211_KEYTYPE_GROUP;
3022         }
3023
3024         /* for now */
3025         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3026             key.type != NL80211_KEYTYPE_GROUP)
3027                 return -EINVAL;
3028
3029         if (!rdev->ops->add_key)
3030                 return -EOPNOTSUPP;
3031
3032         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3033                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3034                                            mac_addr))
3035                 return -EINVAL;
3036
3037         wdev_lock(dev->ieee80211_ptr);
3038         err = nl80211_key_allowed(dev->ieee80211_ptr);
3039         if (!err)
3040                 err = rdev_add_key(rdev, dev, key.idx,
3041                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3042                                     mac_addr, &key.p);
3043         wdev_unlock(dev->ieee80211_ptr);
3044
3045         return err;
3046 }
3047
3048 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3049 {
3050         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3051         int err;
3052         struct net_device *dev = info->user_ptr[1];
3053         u8 *mac_addr = NULL;
3054         struct key_parse key;
3055
3056         err = nl80211_parse_key(info, &key);
3057         if (err)
3058                 return err;
3059
3060         if (info->attrs[NL80211_ATTR_MAC])
3061                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3062
3063         if (key.type == -1) {
3064                 if (mac_addr)
3065                         key.type = NL80211_KEYTYPE_PAIRWISE;
3066                 else
3067                         key.type = NL80211_KEYTYPE_GROUP;
3068         }
3069
3070         /* for now */
3071         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3072             key.type != NL80211_KEYTYPE_GROUP)
3073                 return -EINVAL;
3074
3075         if (!rdev->ops->del_key)
3076                 return -EOPNOTSUPP;
3077
3078         wdev_lock(dev->ieee80211_ptr);
3079         err = nl80211_key_allowed(dev->ieee80211_ptr);
3080
3081         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3082             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3083                 err = -ENOENT;
3084
3085         if (!err)
3086                 err = rdev_del_key(rdev, dev, key.idx,
3087                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3088                                    mac_addr);
3089
3090 #ifdef CONFIG_CFG80211_WEXT
3091         if (!err) {
3092                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3093                         dev->ieee80211_ptr->wext.default_key = -1;
3094                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3095                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3096         }
3097 #endif
3098         wdev_unlock(dev->ieee80211_ptr);
3099
3100         return err;
3101 }
3102
3103 /* This function returns an error or the number of nested attributes */
3104 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3105 {
3106         struct nlattr *attr;
3107         int n_entries = 0, tmp;
3108
3109         nla_for_each_nested(attr, nl_attr, tmp) {
3110                 if (nla_len(attr) != ETH_ALEN)
3111                         return -EINVAL;
3112
3113                 n_entries++;
3114         }
3115
3116         return n_entries;
3117 }
3118
3119 /*
3120  * This function parses ACL information and allocates memory for ACL data.
3121  * On successful return, the calling function is responsible to free the
3122  * ACL buffer returned by this function.
3123  */
3124 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3125                                                 struct genl_info *info)
3126 {
3127         enum nl80211_acl_policy acl_policy;
3128         struct nlattr *attr;
3129         struct cfg80211_acl_data *acl;
3130         int i = 0, n_entries, tmp;
3131
3132         if (!wiphy->max_acl_mac_addrs)
3133                 return ERR_PTR(-EOPNOTSUPP);
3134
3135         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3136                 return ERR_PTR(-EINVAL);
3137
3138         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3139         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3140             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3141                 return ERR_PTR(-EINVAL);
3142
3143         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3144                 return ERR_PTR(-EINVAL);
3145
3146         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3147         if (n_entries < 0)
3148                 return ERR_PTR(n_entries);
3149
3150         if (n_entries > wiphy->max_acl_mac_addrs)
3151                 return ERR_PTR(-ENOTSUPP);
3152
3153         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3154                       GFP_KERNEL);
3155         if (!acl)
3156                 return ERR_PTR(-ENOMEM);
3157
3158         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3159                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3160                 i++;
3161         }
3162
3163         acl->n_acl_entries = n_entries;
3164         acl->acl_policy = acl_policy;
3165
3166         return acl;
3167 }
3168
3169 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3170 {
3171         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3172         struct net_device *dev = info->user_ptr[1];
3173         struct cfg80211_acl_data *acl;
3174         int err;
3175
3176         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3177             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3178                 return -EOPNOTSUPP;
3179
3180         if (!dev->ieee80211_ptr->beacon_interval)
3181                 return -EINVAL;
3182
3183         acl = parse_acl_data(&rdev->wiphy, info);
3184         if (IS_ERR(acl))
3185                 return PTR_ERR(acl);
3186
3187         err = rdev_set_mac_acl(rdev, dev, acl);
3188
3189         kfree(acl);
3190
3191         return err;
3192 }
3193
3194 static int nl80211_parse_beacon(struct nlattr *attrs[],
3195                                 struct cfg80211_beacon_data *bcn)
3196 {
3197         bool haveinfo = false;
3198
3199         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3200             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3201             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3202             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3203                 return -EINVAL;
3204
3205         memset(bcn, 0, sizeof(*bcn));
3206
3207         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3208                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3209                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3210                 if (!bcn->head_len)
3211                         return -EINVAL;
3212                 haveinfo = true;
3213         }
3214
3215         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3216                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3217                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3218                 haveinfo = true;
3219         }
3220
3221         if (!haveinfo)
3222                 return -EINVAL;
3223
3224         if (attrs[NL80211_ATTR_IE]) {
3225                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3226                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3227         }
3228
3229         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3230                 bcn->proberesp_ies =
3231                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3232                 bcn->proberesp_ies_len =
3233                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3234         }
3235
3236         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3237                 bcn->assocresp_ies =
3238                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3239                 bcn->assocresp_ies_len =
3240                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3241         }
3242
3243         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3244                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3245                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3246         }
3247
3248         return 0;
3249 }
3250
3251 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3252                                    struct cfg80211_ap_settings *params)
3253 {
3254         struct wireless_dev *wdev;
3255         bool ret = false;
3256
3257         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3258                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3259                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3260                         continue;
3261
3262                 if (!wdev->preset_chandef.chan)
3263                         continue;
3264
3265                 params->chandef = wdev->preset_chandef;
3266                 ret = true;
3267                 break;
3268         }
3269
3270         return ret;
3271 }
3272
3273 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3274                                     enum nl80211_auth_type auth_type,
3275                                     enum nl80211_commands cmd)
3276 {
3277         if (auth_type > NL80211_AUTHTYPE_MAX)
3278                 return false;
3279
3280         switch (cmd) {
3281         case NL80211_CMD_AUTHENTICATE:
3282                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3283                     auth_type == NL80211_AUTHTYPE_SAE)
3284                         return false;
3285                 return true;
3286         case NL80211_CMD_CONNECT:
3287         case NL80211_CMD_START_AP:
3288                 /* SAE not supported yet */
3289                 if (auth_type == NL80211_AUTHTYPE_SAE)
3290                         return false;
3291                 return true;
3292         default:
3293                 return false;
3294         }
3295 }
3296
3297 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3298 {
3299         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3300         struct net_device *dev = info->user_ptr[1];
3301         struct wireless_dev *wdev = dev->ieee80211_ptr;
3302         struct cfg80211_ap_settings params;
3303         int err;
3304
3305         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3306             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3307                 return -EOPNOTSUPP;
3308
3309         if (!rdev->ops->start_ap)
3310                 return -EOPNOTSUPP;
3311
3312         if (wdev->beacon_interval)
3313                 return -EALREADY;
3314
3315         memset(&params, 0, sizeof(params));
3316
3317         /* these are required for START_AP */
3318         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3319             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3320             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3321                 return -EINVAL;
3322
3323         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3324         if (err)
3325                 return err;
3326
3327         params.beacon_interval =
3328                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3329         params.dtim_period =
3330                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3331
3332         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3333         if (err)
3334                 return err;
3335
3336         /*
3337          * In theory, some of these attributes should be required here
3338          * but since they were not used when the command was originally
3339          * added, keep them optional for old user space programs to let
3340          * them continue to work with drivers that do not need the
3341          * additional information -- drivers must check!
3342          */
3343         if (info->attrs[NL80211_ATTR_SSID]) {
3344                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3345                 params.ssid_len =
3346                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3347                 if (params.ssid_len == 0 ||
3348                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3349                         return -EINVAL;
3350         }
3351
3352         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3353                 params.hidden_ssid = nla_get_u32(
3354                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3355                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3356                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3357                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3358                         return -EINVAL;
3359         }
3360
3361         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3362
3363         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3364                 params.auth_type = nla_get_u32(
3365                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3366                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3367                                              NL80211_CMD_START_AP))
3368                         return -EINVAL;
3369         } else
3370                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3371
3372         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3373                                       NL80211_MAX_NR_CIPHER_SUITES);
3374         if (err)
3375                 return err;
3376
3377         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3378                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3379                         return -EOPNOTSUPP;
3380                 params.inactivity_timeout = nla_get_u16(
3381                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3382         }
3383
3384         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3385                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3386                         return -EINVAL;
3387                 params.p2p_ctwindow =
3388                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3389                 if (params.p2p_ctwindow > 127)
3390                         return -EINVAL;
3391                 if (params.p2p_ctwindow != 0 &&
3392                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3393                         return -EINVAL;
3394         }
3395
3396         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3397                 u8 tmp;
3398
3399                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3400                         return -EINVAL;
3401                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3402                 if (tmp > 1)
3403                         return -EINVAL;
3404                 params.p2p_opp_ps = tmp;
3405                 if (params.p2p_opp_ps != 0 &&
3406                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3407                         return -EINVAL;
3408         }
3409
3410         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3411                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3412                 if (err)
3413                         return err;
3414         } else if (wdev->preset_chandef.chan) {
3415                 params.chandef = wdev->preset_chandef;
3416         } else if (!nl80211_get_ap_channel(rdev, &params))
3417                 return -EINVAL;
3418
3419         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3420                                            wdev->iftype))
3421                 return -EINVAL;
3422
3423         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3424                 params.acl = parse_acl_data(&rdev->wiphy, info);
3425                 if (IS_ERR(params.acl))
3426                         return PTR_ERR(params.acl);
3427         }
3428
3429         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3430                 params.smps_mode =
3431                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3432                 switch (params.smps_mode) {
3433                 case NL80211_SMPS_OFF:
3434                         break;
3435                 case NL80211_SMPS_STATIC:
3436                         if (!(rdev->wiphy.features &
3437                               NL80211_FEATURE_STATIC_SMPS))
3438                                 return -EINVAL;
3439                         break;
3440                 case NL80211_SMPS_DYNAMIC:
3441                         if (!(rdev->wiphy.features &
3442                               NL80211_FEATURE_DYNAMIC_SMPS))
3443                                 return -EINVAL;
3444                         break;
3445                 default:
3446                         return -EINVAL;
3447                 }
3448         } else {
3449                 params.smps_mode = NL80211_SMPS_OFF;
3450         }
3451
3452         wdev_lock(wdev);
3453         err = rdev_start_ap(rdev, dev, &params);
3454         if (!err) {
3455                 wdev->preset_chandef = params.chandef;
3456                 wdev->beacon_interval = params.beacon_interval;
3457                 wdev->chandef = params.chandef;
3458                 wdev->ssid_len = params.ssid_len;
3459                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3460         }
3461         wdev_unlock(wdev);
3462
3463         kfree(params.acl);
3464
3465         return err;
3466 }
3467
3468 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3469 {
3470         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3471         struct net_device *dev = info->user_ptr[1];
3472         struct wireless_dev *wdev = dev->ieee80211_ptr;
3473         struct cfg80211_beacon_data params;
3474         int err;
3475
3476         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3477             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3478                 return -EOPNOTSUPP;
3479
3480         if (!rdev->ops->change_beacon)
3481                 return -EOPNOTSUPP;
3482
3483         if (!wdev->beacon_interval)
3484                 return -EINVAL;
3485
3486         err = nl80211_parse_beacon(info->attrs, &params);
3487         if (err)
3488                 return err;
3489
3490         wdev_lock(wdev);
3491         err = rdev_change_beacon(rdev, dev, &params);
3492         wdev_unlock(wdev);
3493
3494         return err;
3495 }
3496
3497 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3498 {
3499         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3500         struct net_device *dev = info->user_ptr[1];
3501
3502         return cfg80211_stop_ap(rdev, dev, false);
3503 }
3504
3505 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3506         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3507         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3508         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3509         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3510         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3511         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3512 };
3513
3514 static int parse_station_flags(struct genl_info *info,
3515                                enum nl80211_iftype iftype,
3516                                struct station_parameters *params)
3517 {
3518         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3519         struct nlattr *nla;
3520         int flag;
3521
3522         /*
3523          * Try parsing the new attribute first so userspace
3524          * can specify both for older kernels.
3525          */
3526         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3527         if (nla) {
3528                 struct nl80211_sta_flag_update *sta_flags;
3529
3530                 sta_flags = nla_data(nla);
3531                 params->sta_flags_mask = sta_flags->mask;
3532                 params->sta_flags_set = sta_flags->set;
3533                 params->sta_flags_set &= params->sta_flags_mask;
3534                 if ((params->sta_flags_mask |
3535                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3536                         return -EINVAL;
3537                 return 0;
3538         }
3539
3540         /* if present, parse the old attribute */
3541
3542         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3543         if (!nla)
3544                 return 0;
3545
3546         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3547                              nla, sta_flags_policy))
3548                 return -EINVAL;
3549
3550         /*
3551          * Only allow certain flags for interface types so that
3552          * other attributes are silently ignored. Remember that
3553          * this is backward compatibility code with old userspace
3554          * and shouldn't be hit in other cases anyway.
3555          */
3556         switch (iftype) {
3557         case NL80211_IFTYPE_AP:
3558         case NL80211_IFTYPE_AP_VLAN:
3559         case NL80211_IFTYPE_P2P_GO:
3560                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3561                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3562                                          BIT(NL80211_STA_FLAG_WME) |
3563                                          BIT(NL80211_STA_FLAG_MFP);
3564                 break;
3565         case NL80211_IFTYPE_P2P_CLIENT:
3566         case NL80211_IFTYPE_STATION:
3567                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3568                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3569                 break;
3570         case NL80211_IFTYPE_MESH_POINT:
3571                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3572                                          BIT(NL80211_STA_FLAG_MFP) |
3573                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3574         default:
3575                 return -EINVAL;
3576         }
3577
3578         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3579                 if (flags[flag]) {
3580                         params->sta_flags_set |= (1<<flag);
3581
3582                         /* no longer support new API additions in old API */
3583                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3584                                 return -EINVAL;
3585                 }
3586         }
3587
3588         return 0;
3589 }
3590
3591 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3592                                  int attr)
3593 {
3594         struct nlattr *rate;
3595         u32 bitrate;
3596         u16 bitrate_compat;
3597         enum nl80211_attrs rate_flg;
3598
3599         rate = nla_nest_start(msg, attr);
3600         if (!rate)
3601                 return false;
3602
3603         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3604         bitrate = cfg80211_calculate_bitrate(info);
3605         /* report 16-bit bitrate only if we can */
3606         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3607         if (bitrate > 0 &&
3608             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3609                 return false;
3610         if (bitrate_compat > 0 &&
3611             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3612                 return false;
3613
3614         switch (info->bw) {
3615         case RATE_INFO_BW_5:
3616                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3617                 break;
3618         case RATE_INFO_BW_10:
3619                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3620                 break;
3621         default:
3622                 WARN_ON(1);
3623                 /* fall through */
3624         case RATE_INFO_BW_20:
3625                 rate_flg = 0;
3626                 break;
3627         case RATE_INFO_BW_40:
3628                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3629                 break;
3630         case RATE_INFO_BW_80:
3631                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3632                 break;
3633         case RATE_INFO_BW_160:
3634                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3635                 break;
3636         }
3637
3638         if (rate_flg && nla_put_flag(msg, rate_flg))
3639                 return false;
3640
3641         if (info->flags & RATE_INFO_FLAGS_MCS) {
3642                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3643                         return false;
3644                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3645                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3646                         return false;
3647         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3648                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3649                         return false;
3650                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3651                         return false;
3652                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3653                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3654                         return false;
3655         }
3656
3657         nla_nest_end(msg, rate);
3658         return true;
3659 }
3660
3661 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3662                                int id)
3663 {
3664         void *attr;
3665         int i = 0;
3666
3667         if (!mask)
3668                 return true;
3669
3670         attr = nla_nest_start(msg, id);
3671         if (!attr)
3672                 return false;
3673
3674         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3675                 if (!(mask & BIT(i)))
3676                         continue;
3677
3678                 if (nla_put_u8(msg, i, signal[i]))
3679                         return false;
3680         }
3681
3682         nla_nest_end(msg, attr);
3683
3684         return true;
3685 }
3686
3687 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3688                                 u32 seq, int flags,
3689                                 struct cfg80211_registered_device *rdev,
3690                                 struct net_device *dev,
3691                                 const u8 *mac_addr, struct station_info *sinfo)
3692 {
3693         void *hdr;
3694         struct nlattr *sinfoattr, *bss_param;
3695
3696         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3697         if (!hdr)
3698                 return -1;
3699
3700         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3701             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3702             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3703                 goto nla_put_failure;
3704
3705         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3706         if (!sinfoattr)
3707                 goto nla_put_failure;
3708
3709 #define PUT_SINFO(attr, memb, type) do {                                \
3710         if (sinfo->filled & BIT(NL80211_STA_INFO_ ## attr) &&           \
3711             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3712                              sinfo->memb))                              \
3713                 goto nla_put_failure;                                   \
3714         } while (0)
3715
3716         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3717         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3718
3719         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3720                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3721             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3722                         (u32)sinfo->rx_bytes))
3723                 goto nla_put_failure;
3724
3725         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3726                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3727             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3728                         (u32)sinfo->tx_bytes))
3729                 goto nla_put_failure;
3730
3731         PUT_SINFO(RX_BYTES64, rx_bytes, u64);
3732         PUT_SINFO(TX_BYTES64, tx_bytes, u64);
3733         PUT_SINFO(LLID, llid, u16);
3734         PUT_SINFO(PLID, plid, u16);
3735         PUT_SINFO(PLINK_STATE, plink_state, u8);
3736
3737         switch (rdev->wiphy.signal_type) {
3738         case CFG80211_SIGNAL_TYPE_MBM:
3739                 PUT_SINFO(SIGNAL, signal, u8);
3740                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3741                 break;
3742         default:
3743                 break;
3744         }
3745         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3746                 if (!nl80211_put_signal(msg, sinfo->chains,
3747                                         sinfo->chain_signal,
3748                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3749                         goto nla_put_failure;
3750         }
3751         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3752                 if (!nl80211_put_signal(msg, sinfo->chains,
3753                                         sinfo->chain_signal_avg,
3754                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3755                         goto nla_put_failure;
3756         }
3757         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3758                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3759                                           NL80211_STA_INFO_TX_BITRATE))
3760                         goto nla_put_failure;
3761         }
3762         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3763                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3764                                           NL80211_STA_INFO_RX_BITRATE))
3765                         goto nla_put_failure;
3766         }
3767
3768         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3769         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3770         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3771         PUT_SINFO(TX_FAILED, tx_failed, u32);
3772         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3773         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3774         PUT_SINFO(LOCAL_PM, local_pm, u32);
3775         PUT_SINFO(PEER_PM, peer_pm, u32);
3776         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3777
3778         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3779                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3780                 if (!bss_param)
3781                         goto nla_put_failure;
3782
3783                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3784                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3785                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3786                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3787                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3788                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3789                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3790                                sinfo->bss_param.dtim_period) ||
3791                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3792                                 sinfo->bss_param.beacon_interval))
3793                         goto nla_put_failure;
3794
3795                 nla_nest_end(msg, bss_param);
3796         }
3797         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3798             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3799                     sizeof(struct nl80211_sta_flag_update),
3800                     &sinfo->sta_flags))
3801                 goto nla_put_failure;
3802
3803         PUT_SINFO(T_OFFSET, t_offset, u64);
3804         PUT_SINFO(RX_DROP_MISC, rx_dropped_misc, u64);
3805         PUT_SINFO(BEACON_RX, rx_beacon, u64);
3806         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3807
3808 #undef PUT_SINFO
3809
3810         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3811                 struct nlattr *tidsattr;
3812                 int tid;
3813
3814                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3815                 if (!tidsattr)
3816                         goto nla_put_failure;
3817
3818                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3819                         struct cfg80211_tid_stats *tidstats;
3820                         struct nlattr *tidattr;
3821
3822                         tidstats = &sinfo->pertid[tid];
3823
3824                         if (!tidstats->filled)
3825                                 continue;
3826
3827                         tidattr = nla_nest_start(msg, tid + 1);
3828                         if (!tidattr)
3829                                 goto nla_put_failure;
3830
3831 #define PUT_TIDVAL(attr, memb, type) do {                               \
3832         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3833             nla_put_ ## type(msg, NL80211_TID_STATS_ ## attr,           \
3834                              tidstats->memb))                           \
3835                 goto nla_put_failure;                                   \
3836         } while (0)
3837
3838                         PUT_TIDVAL(RX_MSDU, rx_msdu, u64);
3839                         PUT_TIDVAL(TX_MSDU, tx_msdu, u64);
3840                         PUT_TIDVAL(TX_MSDU_RETRIES, tx_msdu_retries, u64);
3841                         PUT_TIDVAL(TX_MSDU_FAILED, tx_msdu_failed, u64);
3842
3843 #undef PUT_TIDVAL
3844                         nla_nest_end(msg, tidattr);
3845                 }
3846
3847                 nla_nest_end(msg, tidsattr);
3848         }
3849
3850         nla_nest_end(msg, sinfoattr);
3851
3852         if (sinfo->assoc_req_ies_len &&
3853             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3854                     sinfo->assoc_req_ies))
3855                 goto nla_put_failure;
3856
3857         genlmsg_end(msg, hdr);
3858         return 0;
3859
3860  nla_put_failure:
3861         genlmsg_cancel(msg, hdr);
3862         return -EMSGSIZE;
3863 }
3864
3865 static int nl80211_dump_station(struct sk_buff *skb,
3866                                 struct netlink_callback *cb)
3867 {
3868         struct station_info sinfo;
3869         struct cfg80211_registered_device *rdev;
3870         struct wireless_dev *wdev;
3871         u8 mac_addr[ETH_ALEN];
3872         int sta_idx = cb->args[2];
3873         int err;
3874
3875         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3876         if (err)
3877                 return err;
3878
3879         if (!wdev->netdev) {
3880                 err = -EINVAL;
3881                 goto out_err;
3882         }
3883
3884         if (!rdev->ops->dump_station) {
3885                 err = -EOPNOTSUPP;
3886                 goto out_err;
3887         }
3888
3889         while (1) {
3890                 memset(&sinfo, 0, sizeof(sinfo));
3891                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3892                                         mac_addr, &sinfo);
3893                 if (err == -ENOENT)
3894                         break;
3895                 if (err)
3896                         goto out_err;
3897
3898                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3899                                 NETLINK_CB(cb->skb).portid,
3900                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3901                                 rdev, wdev->netdev, mac_addr,
3902                                 &sinfo) < 0)
3903                         goto out;
3904
3905                 sta_idx++;
3906         }
3907
3908
3909  out:
3910         cb->args[2] = sta_idx;
3911         err = skb->len;
3912  out_err:
3913         nl80211_finish_wdev_dump(rdev);
3914
3915         return err;
3916 }
3917
3918 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3919 {
3920         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3921         struct net_device *dev = info->user_ptr[1];
3922         struct station_info sinfo;
3923         struct sk_buff *msg;
3924         u8 *mac_addr = NULL;
3925         int err;
3926
3927         memset(&sinfo, 0, sizeof(sinfo));
3928
3929         if (!info->attrs[NL80211_ATTR_MAC])
3930                 return -EINVAL;
3931
3932         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3933
3934         if (!rdev->ops->get_station)
3935                 return -EOPNOTSUPP;
3936
3937         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3938         if (err)
3939                 return err;
3940
3941         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3942         if (!msg)
3943                 return -ENOMEM;
3944
3945         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
3946                                  info->snd_portid, info->snd_seq, 0,
3947                                  rdev, dev, mac_addr, &sinfo) < 0) {
3948                 nlmsg_free(msg);
3949                 return -ENOBUFS;
3950         }
3951
3952         return genlmsg_reply(msg, info);
3953 }
3954
3955 int cfg80211_check_station_change(struct wiphy *wiphy,
3956                                   struct station_parameters *params,
3957                                   enum cfg80211_station_type statype)
3958 {
3959         if (params->listen_interval != -1)
3960                 return -EINVAL;
3961         if (params->aid &&
3962             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3963                 return -EINVAL;
3964
3965         /* When you run into this, adjust the code below for the new flag */
3966         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3967
3968         switch (statype) {
3969         case CFG80211_STA_MESH_PEER_KERNEL:
3970         case CFG80211_STA_MESH_PEER_USER:
3971                 /*
3972                  * No ignoring the TDLS flag here -- the userspace mesh
3973                  * code doesn't have the bug of including TDLS in the
3974                  * mask everywhere.
3975                  */
3976                 if (params->sta_flags_mask &
3977                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3978                                   BIT(NL80211_STA_FLAG_MFP) |
3979                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3980                         return -EINVAL;
3981                 break;
3982         case CFG80211_STA_TDLS_PEER_SETUP:
3983         case CFG80211_STA_TDLS_PEER_ACTIVE:
3984                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3985                         return -EINVAL;
3986                 /* ignore since it can't change */
3987                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3988                 break;
3989         default:
3990                 /* disallow mesh-specific things */
3991                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3992                         return -EINVAL;
3993                 if (params->local_pm)
3994                         return -EINVAL;
3995                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3996                         return -EINVAL;
3997         }
3998
3999         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4000             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4001                 /* TDLS can't be set, ... */
4002                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4003                         return -EINVAL;
4004                 /*
4005                  * ... but don't bother the driver with it. This works around
4006                  * a hostapd/wpa_supplicant issue -- it always includes the
4007                  * TLDS_PEER flag in the mask even for AP mode.
4008                  */
4009                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4010         }
4011
4012         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4013             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4014                 /* reject other things that can't change */
4015                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4016                         return -EINVAL;
4017                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4018                         return -EINVAL;
4019                 if (params->supported_rates)
4020                         return -EINVAL;
4021                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4022                         return -EINVAL;
4023         }
4024
4025         if (statype != CFG80211_STA_AP_CLIENT &&
4026             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4027                 if (params->vlan)
4028                         return -EINVAL;
4029         }
4030
4031         switch (statype) {
4032         case CFG80211_STA_AP_MLME_CLIENT:
4033                 /* Use this only for authorizing/unauthorizing a station */
4034                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4035                         return -EOPNOTSUPP;
4036                 break;
4037         case CFG80211_STA_AP_CLIENT:
4038         case CFG80211_STA_AP_CLIENT_UNASSOC:
4039                 /* accept only the listed bits */
4040                 if (params->sta_flags_mask &
4041                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4042                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4043                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4044                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4045                                   BIT(NL80211_STA_FLAG_WME) |
4046                                   BIT(NL80211_STA_FLAG_MFP)))
4047                         return -EINVAL;
4048
4049                 /* but authenticated/associated only if driver handles it */
4050                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4051                     params->sta_flags_mask &
4052                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4053                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4054                         return -EINVAL;
4055                 break;
4056         case CFG80211_STA_IBSS:
4057         case CFG80211_STA_AP_STA:
4058                 /* reject any changes other than AUTHORIZED */
4059                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4060                         return -EINVAL;
4061                 break;
4062         case CFG80211_STA_TDLS_PEER_SETUP:
4063                 /* reject any changes other than AUTHORIZED or WME */
4064                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4065                                                BIT(NL80211_STA_FLAG_WME)))
4066                         return -EINVAL;
4067                 /* force (at least) rates when authorizing */
4068                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4069                     !params->supported_rates)
4070                         return -EINVAL;
4071                 break;
4072         case CFG80211_STA_TDLS_PEER_ACTIVE:
4073                 /* reject any changes */
4074                 return -EINVAL;
4075         case CFG80211_STA_MESH_PEER_KERNEL:
4076                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4077                         return -EINVAL;
4078                 break;
4079         case CFG80211_STA_MESH_PEER_USER:
4080                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4081                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4082                         return -EINVAL;
4083                 break;
4084         }
4085
4086         return 0;
4087 }
4088 EXPORT_SYMBOL(cfg80211_check_station_change);
4089
4090 /*
4091  * Get vlan interface making sure it is running and on the right wiphy.
4092  */
4093 static struct net_device *get_vlan(struct genl_info *info,
4094                                    struct cfg80211_registered_device *rdev)
4095 {
4096         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4097         struct net_device *v;
4098         int ret;
4099
4100         if (!vlanattr)
4101                 return NULL;
4102
4103         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4104         if (!v)
4105                 return ERR_PTR(-ENODEV);
4106
4107         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4108                 ret = -EINVAL;
4109                 goto error;
4110         }
4111
4112         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4113             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4114             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4115                 ret = -EINVAL;
4116                 goto error;
4117         }
4118
4119         if (!netif_running(v)) {
4120                 ret = -ENETDOWN;
4121                 goto error;
4122         }
4123
4124         return v;
4125  error:
4126         dev_put(v);
4127         return ERR_PTR(ret);
4128 }
4129
4130 static const struct nla_policy
4131 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4132         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4133         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4134 };
4135
4136 static int nl80211_parse_sta_wme(struct genl_info *info,
4137                                  struct station_parameters *params)
4138 {
4139         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4140         struct nlattr *nla;
4141         int err;
4142
4143         /* parse WME attributes if present */
4144         if (!info->attrs[NL80211_ATTR_STA_WME])
4145                 return 0;
4146
4147         nla = info->attrs[NL80211_ATTR_STA_WME];
4148         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4149                                nl80211_sta_wme_policy);
4150         if (err)
4151                 return err;
4152
4153         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4154                 params->uapsd_queues = nla_get_u8(
4155                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4156         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4157                 return -EINVAL;
4158
4159         if (tb[NL80211_STA_WME_MAX_SP])
4160                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4161
4162         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4163                 return -EINVAL;
4164
4165         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4166
4167         return 0;
4168 }
4169
4170 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4171                                       struct station_parameters *params)
4172 {
4173         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4174                 params->supported_channels =
4175                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4176                 params->supported_channels_len =
4177                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4178                 /*
4179                  * Need to include at least one (first channel, number of
4180                  * channels) tuple for each subband, and must have proper
4181                  * tuples for the rest of the data as well.
4182                  */
4183                 if (params->supported_channels_len < 2)
4184                         return -EINVAL;
4185                 if (params->supported_channels_len % 2)
4186                         return -EINVAL;
4187         }
4188
4189         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4190                 params->supported_oper_classes =
4191                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4192                 params->supported_oper_classes_len =
4193                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4194                 /*
4195                  * The value of the Length field of the Supported Operating
4196                  * Classes element is between 2 and 253.
4197                  */
4198                 if (params->supported_oper_classes_len < 2 ||
4199                     params->supported_oper_classes_len > 253)
4200                         return -EINVAL;
4201         }
4202         return 0;
4203 }
4204
4205 static int nl80211_set_station_tdls(struct genl_info *info,
4206                                     struct station_parameters *params)
4207 {
4208         int err;
4209         /* Dummy STA entry gets updated once the peer capabilities are known */
4210         if (info->attrs[NL80211_ATTR_PEER_AID])
4211                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4212         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4213                 params->ht_capa =
4214                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4215         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4216                 params->vht_capa =
4217                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4218
4219         err = nl80211_parse_sta_channel_info(info, params);
4220         if (err)
4221                 return err;
4222
4223         return nl80211_parse_sta_wme(info, params);
4224 }
4225
4226 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4227 {
4228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4229         struct net_device *dev = info->user_ptr[1];
4230         struct station_parameters params;
4231         u8 *mac_addr;
4232         int err;
4233
4234         memset(&params, 0, sizeof(params));
4235
4236         params.listen_interval = -1;
4237
4238         if (!rdev->ops->change_station)
4239                 return -EOPNOTSUPP;
4240
4241         if (info->attrs[NL80211_ATTR_STA_AID])
4242                 return -EINVAL;
4243
4244         if (!info->attrs[NL80211_ATTR_MAC])
4245                 return -EINVAL;
4246
4247         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4248
4249         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4250                 params.supported_rates =
4251                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4252                 params.supported_rates_len =
4253                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4254         }
4255
4256         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4257                 params.capability =
4258                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4259                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4260         }
4261
4262         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4263                 params.ext_capab =
4264                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4265                 params.ext_capab_len =
4266                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4267         }
4268
4269         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4270                 return -EINVAL;
4271
4272         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4273                 return -EINVAL;
4274
4275         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4276                 params.plink_action =
4277                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4278                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4279                         return -EINVAL;
4280         }
4281
4282         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4283                 params.plink_state =
4284                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4285                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4286                         return -EINVAL;
4287                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4288         }
4289
4290         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4291                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4292                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4293
4294                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4295                     pm > NL80211_MESH_POWER_MAX)
4296                         return -EINVAL;
4297
4298                 params.local_pm = pm;
4299         }
4300
4301         /* Include parameters for TDLS peer (will check later) */
4302         err = nl80211_set_station_tdls(info, &params);
4303         if (err)
4304                 return err;
4305
4306         params.vlan = get_vlan(info, rdev);
4307         if (IS_ERR(params.vlan))
4308                 return PTR_ERR(params.vlan);
4309
4310         switch (dev->ieee80211_ptr->iftype) {
4311         case NL80211_IFTYPE_AP:
4312         case NL80211_IFTYPE_AP_VLAN:
4313         case NL80211_IFTYPE_P2P_GO:
4314         case NL80211_IFTYPE_P2P_CLIENT:
4315         case NL80211_IFTYPE_STATION:
4316         case NL80211_IFTYPE_ADHOC:
4317         case NL80211_IFTYPE_MESH_POINT:
4318                 break;
4319         default:
4320                 err = -EOPNOTSUPP;
4321                 goto out_put_vlan;
4322         }
4323
4324         /* driver will call cfg80211_check_station_change() */
4325         err = rdev_change_station(rdev, dev, mac_addr, &params);
4326
4327  out_put_vlan:
4328         if (params.vlan)
4329                 dev_put(params.vlan);
4330
4331         return err;
4332 }
4333
4334 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4335 {
4336         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4337         int err;
4338         struct net_device *dev = info->user_ptr[1];
4339         struct station_parameters params;
4340         u8 *mac_addr = NULL;
4341
4342         memset(&params, 0, sizeof(params));
4343
4344         if (!rdev->ops->add_station)
4345                 return -EOPNOTSUPP;
4346
4347         if (!info->attrs[NL80211_ATTR_MAC])
4348                 return -EINVAL;
4349
4350         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4351                 return -EINVAL;
4352
4353         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4354                 return -EINVAL;
4355
4356         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4357             !info->attrs[NL80211_ATTR_PEER_AID])
4358                 return -EINVAL;
4359
4360         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4361         params.supported_rates =
4362                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4363         params.supported_rates_len =
4364                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4365         params.listen_interval =
4366                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4367
4368         if (info->attrs[NL80211_ATTR_PEER_AID])
4369                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4370         else
4371                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4372         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4373                 return -EINVAL;
4374
4375         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4376                 params.capability =
4377                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4378                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4379         }
4380
4381         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4382                 params.ext_capab =
4383                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4384                 params.ext_capab_len =
4385                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4386         }
4387
4388         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4389                 params.ht_capa =
4390                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4391
4392         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4393                 params.vht_capa =
4394                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4395
4396         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4397                 params.opmode_notif_used = true;
4398                 params.opmode_notif =
4399                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4400         }
4401
4402         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4403                 params.plink_action =
4404                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4405                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4406                         return -EINVAL;
4407         }
4408
4409         err = nl80211_parse_sta_channel_info(info, &params);
4410         if (err)
4411                 return err;
4412
4413         err = nl80211_parse_sta_wme(info, &params);
4414         if (err)
4415                 return err;
4416
4417         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4418                 return -EINVAL;
4419
4420         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4421          * as userspace might just pass through the capabilities from the IEs
4422          * directly, rather than enforcing this restriction and returning an
4423          * error in this case.
4424          */
4425         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4426                 params.ht_capa = NULL;
4427                 params.vht_capa = NULL;
4428         }
4429
4430         /* When you run into this, adjust the code below for the new flag */
4431         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4432
4433         switch (dev->ieee80211_ptr->iftype) {
4434         case NL80211_IFTYPE_AP:
4435         case NL80211_IFTYPE_AP_VLAN:
4436         case NL80211_IFTYPE_P2P_GO:
4437                 /* ignore WME attributes if iface/sta is not capable */
4438                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4439                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4440                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4441
4442                 /* TDLS peers cannot be added */
4443                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4444                     info->attrs[NL80211_ATTR_PEER_AID])
4445                         return -EINVAL;
4446                 /* but don't bother the driver with it */
4447                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4448
4449                 /* allow authenticated/associated only if driver handles it */
4450                 if (!(rdev->wiphy.features &
4451                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4452                     params.sta_flags_mask &
4453                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4454                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4455                         return -EINVAL;
4456
4457                 /* must be last in here for error handling */
4458                 params.vlan = get_vlan(info, rdev);
4459                 if (IS_ERR(params.vlan))
4460                         return PTR_ERR(params.vlan);
4461                 break;
4462         case NL80211_IFTYPE_MESH_POINT:
4463                 /* ignore uAPSD data */
4464                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4465
4466                 /* associated is disallowed */
4467                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4468                         return -EINVAL;
4469                 /* TDLS peers cannot be added */
4470                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4471                     info->attrs[NL80211_ATTR_PEER_AID])
4472                         return -EINVAL;
4473                 break;
4474         case NL80211_IFTYPE_STATION:
4475         case NL80211_IFTYPE_P2P_CLIENT:
4476                 /* ignore uAPSD data */
4477                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4478
4479                 /* these are disallowed */
4480                 if (params.sta_flags_mask &
4481                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4482                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4483                         return -EINVAL;
4484                 /* Only TDLS peers can be added */
4485                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4486                         return -EINVAL;
4487                 /* Can only add if TDLS ... */
4488                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4489                         return -EOPNOTSUPP;
4490                 /* ... with external setup is supported */
4491                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4492                         return -EOPNOTSUPP;
4493                 /*
4494                  * Older wpa_supplicant versions always mark the TDLS peer
4495                  * as authorized, but it shouldn't yet be.
4496                  */
4497                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4498                 break;
4499         default:
4500                 return -EOPNOTSUPP;
4501         }
4502
4503         /* be aware of params.vlan when changing code here */
4504
4505         err = rdev_add_station(rdev, dev, mac_addr, &params);
4506
4507         if (params.vlan)
4508                 dev_put(params.vlan);
4509         return err;
4510 }
4511
4512 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4513 {
4514         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4515         struct net_device *dev = info->user_ptr[1];
4516         struct station_del_parameters params;
4517
4518         memset(&params, 0, sizeof(params));
4519
4520         if (info->attrs[NL80211_ATTR_MAC])
4521                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4522
4523         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4524             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4525             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4526             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4527                 return -EINVAL;
4528
4529         if (!rdev->ops->del_station)
4530                 return -EOPNOTSUPP;
4531
4532         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4533                 params.subtype =
4534                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4535                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4536                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4537                         return -EINVAL;
4538         } else {
4539                 /* Default to Deauthentication frame */
4540                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4541         }
4542
4543         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4544                 params.reason_code =
4545                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4546                 if (params.reason_code == 0)
4547                         return -EINVAL; /* 0 is reserved */
4548         } else {
4549                 /* Default to reason code 2 */
4550                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4551         }
4552
4553         return rdev_del_station(rdev, dev, &params);
4554 }
4555
4556 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4557                                 int flags, struct net_device *dev,
4558                                 u8 *dst, u8 *next_hop,
4559                                 struct mpath_info *pinfo)
4560 {
4561         void *hdr;
4562         struct nlattr *pinfoattr;
4563
4564         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4565         if (!hdr)
4566                 return -1;
4567
4568         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4569             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4570             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4571             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4572                 goto nla_put_failure;
4573
4574         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4575         if (!pinfoattr)
4576                 goto nla_put_failure;
4577         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4578             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4579                         pinfo->frame_qlen))
4580                 goto nla_put_failure;
4581         if (((pinfo->filled & MPATH_INFO_SN) &&
4582              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4583             ((pinfo->filled & MPATH_INFO_METRIC) &&
4584              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4585                          pinfo->metric)) ||
4586             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4587              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4588                          pinfo->exptime)) ||
4589             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4590              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4591                         pinfo->flags)) ||
4592             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4593              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4594                          pinfo->discovery_timeout)) ||
4595             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4596              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4597                         pinfo->discovery_retries)))
4598                 goto nla_put_failure;
4599
4600         nla_nest_end(msg, pinfoattr);
4601
4602         genlmsg_end(msg, hdr);
4603         return 0;
4604
4605  nla_put_failure:
4606         genlmsg_cancel(msg, hdr);
4607         return -EMSGSIZE;
4608 }
4609
4610 static int nl80211_dump_mpath(struct sk_buff *skb,
4611                               struct netlink_callback *cb)
4612 {
4613         struct mpath_info pinfo;
4614         struct cfg80211_registered_device *rdev;
4615         struct wireless_dev *wdev;
4616         u8 dst[ETH_ALEN];
4617         u8 next_hop[ETH_ALEN];
4618         int path_idx = cb->args[2];
4619         int err;
4620
4621         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4622         if (err)
4623                 return err;
4624
4625         if (!rdev->ops->dump_mpath) {
4626                 err = -EOPNOTSUPP;
4627                 goto out_err;
4628         }
4629
4630         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4631                 err = -EOPNOTSUPP;
4632                 goto out_err;
4633         }
4634
4635         while (1) {
4636                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4637                                       next_hop, &pinfo);
4638                 if (err == -ENOENT)
4639                         break;
4640                 if (err)
4641                         goto out_err;
4642
4643                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4644                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4645                                        wdev->netdev, dst, next_hop,
4646                                        &pinfo) < 0)
4647                         goto out;
4648
4649                 path_idx++;
4650         }
4651
4652
4653  out:
4654         cb->args[2] = path_idx;
4655         err = skb->len;
4656  out_err:
4657         nl80211_finish_wdev_dump(rdev);
4658         return err;
4659 }
4660
4661 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4662 {
4663         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4664         int err;
4665         struct net_device *dev = info->user_ptr[1];
4666         struct mpath_info pinfo;
4667         struct sk_buff *msg;
4668         u8 *dst = NULL;
4669         u8 next_hop[ETH_ALEN];
4670
4671         memset(&pinfo, 0, sizeof(pinfo));
4672
4673         if (!info->attrs[NL80211_ATTR_MAC])
4674                 return -EINVAL;
4675
4676         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4677
4678         if (!rdev->ops->get_mpath)
4679                 return -EOPNOTSUPP;
4680
4681         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4682                 return -EOPNOTSUPP;
4683
4684         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4685         if (err)
4686                 return err;
4687
4688         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4689         if (!msg)
4690                 return -ENOMEM;
4691
4692         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4693                                  dev, dst, next_hop, &pinfo) < 0) {
4694                 nlmsg_free(msg);
4695                 return -ENOBUFS;
4696         }
4697
4698         return genlmsg_reply(msg, info);
4699 }
4700
4701 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4702 {
4703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4704         struct net_device *dev = info->user_ptr[1];
4705         u8 *dst = NULL;
4706         u8 *next_hop = NULL;
4707
4708         if (!info->attrs[NL80211_ATTR_MAC])
4709                 return -EINVAL;
4710
4711         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4712                 return -EINVAL;
4713
4714         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4715         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4716
4717         if (!rdev->ops->change_mpath)
4718                 return -EOPNOTSUPP;
4719
4720         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4721                 return -EOPNOTSUPP;
4722
4723         return rdev_change_mpath(rdev, dev, dst, next_hop);
4724 }
4725
4726 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4727 {
4728         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4729         struct net_device *dev = info->user_ptr[1];
4730         u8 *dst = NULL;
4731         u8 *next_hop = NULL;
4732
4733         if (!info->attrs[NL80211_ATTR_MAC])
4734                 return -EINVAL;
4735
4736         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4737                 return -EINVAL;
4738
4739         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4740         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4741
4742         if (!rdev->ops->add_mpath)
4743                 return -EOPNOTSUPP;
4744
4745         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4746                 return -EOPNOTSUPP;
4747
4748         return rdev_add_mpath(rdev, dev, dst, next_hop);
4749 }
4750
4751 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4752 {
4753         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4754         struct net_device *dev = info->user_ptr[1];
4755         u8 *dst = NULL;
4756
4757         if (info->attrs[NL80211_ATTR_MAC])
4758                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4759
4760         if (!rdev->ops->del_mpath)
4761                 return -EOPNOTSUPP;
4762
4763         return rdev_del_mpath(rdev, dev, dst);
4764 }
4765
4766 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4767 {
4768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4769         int err;
4770         struct net_device *dev = info->user_ptr[1];
4771         struct mpath_info pinfo;
4772         struct sk_buff *msg;
4773         u8 *dst = NULL;
4774         u8 mpp[ETH_ALEN];
4775
4776         memset(&pinfo, 0, sizeof(pinfo));
4777
4778         if (!info->attrs[NL80211_ATTR_MAC])
4779                 return -EINVAL;
4780
4781         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4782
4783         if (!rdev->ops->get_mpp)
4784                 return -EOPNOTSUPP;
4785
4786         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4787                 return -EOPNOTSUPP;
4788
4789         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4790         if (err)
4791                 return err;
4792
4793         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4794         if (!msg)
4795                 return -ENOMEM;
4796
4797         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4798                                dev, dst, mpp, &pinfo) < 0) {
4799                 nlmsg_free(msg);
4800                 return -ENOBUFS;
4801         }
4802
4803         return genlmsg_reply(msg, info);
4804 }
4805
4806 static int nl80211_dump_mpp(struct sk_buff *skb,
4807                             struct netlink_callback *cb)
4808 {
4809         struct mpath_info pinfo;
4810         struct cfg80211_registered_device *rdev;
4811         struct wireless_dev *wdev;
4812         u8 dst[ETH_ALEN];
4813         u8 mpp[ETH_ALEN];
4814         int path_idx = cb->args[2];
4815         int err;
4816
4817         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4818         if (err)
4819                 return err;
4820
4821         if (!rdev->ops->dump_mpp) {
4822                 err = -EOPNOTSUPP;
4823                 goto out_err;
4824         }
4825
4826         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4827                 err = -EOPNOTSUPP;
4828                 goto out_err;
4829         }
4830
4831         while (1) {
4832                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4833                                     mpp, &pinfo);
4834                 if (err == -ENOENT)
4835                         break;
4836                 if (err)
4837                         goto out_err;
4838
4839                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4840                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4841                                        wdev->netdev, dst, mpp,
4842                                        &pinfo) < 0)
4843                         goto out;
4844
4845                 path_idx++;
4846         }
4847
4848  out:
4849         cb->args[2] = path_idx;
4850         err = skb->len;
4851  out_err:
4852         nl80211_finish_wdev_dump(rdev);
4853         return err;
4854 }
4855
4856 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4857 {
4858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4859         struct net_device *dev = info->user_ptr[1];
4860         struct wireless_dev *wdev = dev->ieee80211_ptr;
4861         struct bss_parameters params;
4862         int err;
4863
4864         memset(&params, 0, sizeof(params));
4865         /* default to not changing parameters */
4866         params.use_cts_prot = -1;
4867         params.use_short_preamble = -1;
4868         params.use_short_slot_time = -1;
4869         params.ap_isolate = -1;
4870         params.ht_opmode = -1;
4871         params.p2p_ctwindow = -1;
4872         params.p2p_opp_ps = -1;
4873
4874         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4875                 params.use_cts_prot =
4876                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4877         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4878                 params.use_short_preamble =
4879                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4880         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4881                 params.use_short_slot_time =
4882                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4883         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4884                 params.basic_rates =
4885                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4886                 params.basic_rates_len =
4887                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4888         }
4889         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4890                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4891         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4892                 params.ht_opmode =
4893                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4894
4895         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4896                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4897                         return -EINVAL;
4898                 params.p2p_ctwindow =
4899                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4900                 if (params.p2p_ctwindow < 0)
4901                         return -EINVAL;
4902                 if (params.p2p_ctwindow != 0 &&
4903                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4904                         return -EINVAL;
4905         }
4906
4907         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4908                 u8 tmp;
4909
4910                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4911                         return -EINVAL;
4912                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4913                 if (tmp > 1)
4914                         return -EINVAL;
4915                 params.p2p_opp_ps = tmp;
4916                 if (params.p2p_opp_ps &&
4917                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4918                         return -EINVAL;
4919         }
4920
4921         if (!rdev->ops->change_bss)
4922                 return -EOPNOTSUPP;
4923
4924         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4925             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4926                 return -EOPNOTSUPP;
4927
4928         wdev_lock(wdev);
4929         err = rdev_change_bss(rdev, dev, &params);
4930         wdev_unlock(wdev);
4931
4932         return err;
4933 }
4934
4935 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4936         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4937         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4938         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4939         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4940         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4941         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4942         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
4943 };
4944
4945 static int parse_reg_rule(struct nlattr *tb[],
4946         struct ieee80211_reg_rule *reg_rule)
4947 {
4948         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4949         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4950
4951         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4952                 return -EINVAL;
4953         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4954                 return -EINVAL;
4955         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4956                 return -EINVAL;
4957         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4958                 return -EINVAL;
4959         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4960                 return -EINVAL;
4961
4962         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4963
4964         freq_range->start_freq_khz =
4965                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4966         freq_range->end_freq_khz =
4967                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4968         freq_range->max_bandwidth_khz =
4969                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4970
4971         power_rule->max_eirp =
4972                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4973
4974         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4975                 power_rule->max_antenna_gain =
4976                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4977
4978         if (tb[NL80211_ATTR_DFS_CAC_TIME])
4979                 reg_rule->dfs_cac_ms =
4980                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
4981
4982         return 0;
4983 }
4984
4985 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4986 {
4987         char *data = NULL;
4988         bool is_indoor;
4989         enum nl80211_user_reg_hint_type user_reg_hint_type;
4990         u32 owner_nlportid;
4991
4992
4993         /*
4994          * You should only get this when cfg80211 hasn't yet initialized
4995          * completely when built-in to the kernel right between the time
4996          * window between nl80211_init() and regulatory_init(), if that is
4997          * even possible.
4998          */
4999         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5000                 return -EINPROGRESS;
5001
5002         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5003                 user_reg_hint_type =
5004                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5005         else
5006                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5007
5008         switch (user_reg_hint_type) {
5009         case NL80211_USER_REG_HINT_USER:
5010         case NL80211_USER_REG_HINT_CELL_BASE:
5011                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5012                         return -EINVAL;
5013
5014                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5015                 return regulatory_hint_user(data, user_reg_hint_type);
5016         case NL80211_USER_REG_HINT_INDOOR:
5017                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5018                         owner_nlportid = info->snd_portid;
5019                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5020                 } else {
5021                         owner_nlportid = 0;
5022                         is_indoor = true;
5023                 }
5024
5025                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5026         default:
5027                 return -EINVAL;
5028         }
5029 }
5030
5031 static int nl80211_get_mesh_config(struct sk_buff *skb,
5032                                    struct genl_info *info)
5033 {
5034         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5035         struct net_device *dev = info->user_ptr[1];
5036         struct wireless_dev *wdev = dev->ieee80211_ptr;
5037         struct mesh_config cur_params;
5038         int err = 0;
5039         void *hdr;
5040         struct nlattr *pinfoattr;
5041         struct sk_buff *msg;
5042
5043         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5044                 return -EOPNOTSUPP;
5045
5046         if (!rdev->ops->get_mesh_config)
5047                 return -EOPNOTSUPP;
5048
5049         wdev_lock(wdev);
5050         /* If not connected, get default parameters */
5051         if (!wdev->mesh_id_len)
5052                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5053         else
5054                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5055         wdev_unlock(wdev);
5056
5057         if (err)
5058                 return err;
5059
5060         /* Draw up a netlink message to send back */
5061         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5062         if (!msg)
5063                 return -ENOMEM;
5064         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5065                              NL80211_CMD_GET_MESH_CONFIG);
5066         if (!hdr)
5067                 goto out;
5068         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5069         if (!pinfoattr)
5070                 goto nla_put_failure;
5071         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5072             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5073                         cur_params.dot11MeshRetryTimeout) ||
5074             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5075                         cur_params.dot11MeshConfirmTimeout) ||
5076             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5077                         cur_params.dot11MeshHoldingTimeout) ||
5078             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5079                         cur_params.dot11MeshMaxPeerLinks) ||
5080             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5081                        cur_params.dot11MeshMaxRetries) ||
5082             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5083                        cur_params.dot11MeshTTL) ||
5084             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5085                        cur_params.element_ttl) ||
5086             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5087                        cur_params.auto_open_plinks) ||
5088             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5089                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5090             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5091                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5092             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5093                         cur_params.path_refresh_time) ||
5094             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5095                         cur_params.min_discovery_timeout) ||
5096             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5097                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5098             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5099                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5100             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5101                         cur_params.dot11MeshHWMPperrMinInterval) ||
5102             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5103                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5104             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5105                        cur_params.dot11MeshHWMPRootMode) ||
5106             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5107                         cur_params.dot11MeshHWMPRannInterval) ||
5108             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5109                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5110             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5111                        cur_params.dot11MeshForwarding) ||
5112             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5113                         cur_params.rssi_threshold) ||
5114             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5115                         cur_params.ht_opmode) ||
5116             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5117                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5118             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5119                         cur_params.dot11MeshHWMProotInterval) ||
5120             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5121                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5122             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5123                         cur_params.power_mode) ||
5124             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5125                         cur_params.dot11MeshAwakeWindowDuration) ||
5126             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5127                         cur_params.plink_timeout))
5128                 goto nla_put_failure;
5129         nla_nest_end(msg, pinfoattr);
5130         genlmsg_end(msg, hdr);
5131         return genlmsg_reply(msg, info);
5132
5133  nla_put_failure:
5134         genlmsg_cancel(msg, hdr);
5135  out:
5136         nlmsg_free(msg);
5137         return -ENOBUFS;
5138 }
5139
5140 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5141         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5142         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5143         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5144         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5145         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5146         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5147         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5148         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5149         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5150         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5151         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5152         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5153         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5154         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5155         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5156         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5157         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5158         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5159         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5160         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5161         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5162         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5163         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5164         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5165         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5166         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5167         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5168         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5169 };
5170
5171 static const struct nla_policy
5172         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5173         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5174         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5175         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5176         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5177         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5178         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5179         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5180                                     .len = IEEE80211_MAX_DATA_LEN },
5181         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5182 };
5183
5184 static int nl80211_parse_mesh_config(struct genl_info *info,
5185                                      struct mesh_config *cfg,
5186                                      u32 *mask_out)
5187 {
5188         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5189         u32 mask = 0;
5190
5191 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5192 do {                                                                        \
5193         if (tb[attr]) {                                                     \
5194                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5195                         return -EINVAL;                                     \
5196                 cfg->param = fn(tb[attr]);                                  \
5197                 mask |= (1 << (attr - 1));                                  \
5198         }                                                                   \
5199 } while (0)
5200
5201
5202         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5203                 return -EINVAL;
5204         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5205                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5206                              nl80211_meshconf_params_policy))
5207                 return -EINVAL;
5208
5209         /* This makes sure that there aren't more than 32 mesh config
5210          * parameters (otherwise our bitfield scheme would not work.) */
5211         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5212
5213         /* Fill in the params struct */
5214         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5215                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5216                                   nla_get_u16);
5217         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5218                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5219                                   nla_get_u16);
5220         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5221                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5222                                   nla_get_u16);
5223         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5224                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5225                                   nla_get_u16);
5226         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5227                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5228                                   nla_get_u8);
5229         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5230                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5231         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5232                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5233                                   nla_get_u8);
5234         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5235                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5236                                   nla_get_u8);
5237         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5238                                   1, 255, mask,
5239                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5240                                   nla_get_u32);
5241         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5242                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5243                                   nla_get_u8);
5244         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5245                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5246                                   nla_get_u32);
5247         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5248                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5249                                   nla_get_u16);
5250         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5251                                   1, 65535, mask,
5252                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5253                                   nla_get_u32);
5254         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5255                                   1, 65535, mask,
5256                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5257                                   nla_get_u16);
5258         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5259                                   1, 65535, mask,
5260                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5261                                   nla_get_u16);
5262         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5263                                   dot11MeshHWMPnetDiameterTraversalTime,
5264                                   1, 65535, mask,
5265                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5266                                   nla_get_u16);
5267         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5268                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5269                                   nla_get_u8);
5270         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5271                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5272                                   nla_get_u16);
5273         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5274                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5275                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5276                                   nla_get_u8);
5277         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5278                                   mask, NL80211_MESHCONF_FORWARDING,
5279                                   nla_get_u8);
5280         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5281                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5282                                   nla_get_s32);
5283         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5284                                   mask, NL80211_MESHCONF_HT_OPMODE,
5285                                   nla_get_u16);
5286         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5287                                   1, 65535, mask,
5288                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5289                                   nla_get_u32);
5290         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5291                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5292                                   nla_get_u16);
5293         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5294                                   dot11MeshHWMPconfirmationInterval,
5295                                   1, 65535, mask,
5296                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5297                                   nla_get_u16);
5298         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5299                                   NL80211_MESH_POWER_ACTIVE,
5300                                   NL80211_MESH_POWER_MAX,
5301                                   mask, NL80211_MESHCONF_POWER_MODE,
5302                                   nla_get_u32);
5303         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5304                                   0, 65535, mask,
5305                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5306         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5307                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5308                                   nla_get_u32);
5309         if (mask_out)
5310                 *mask_out = mask;
5311
5312         return 0;
5313
5314 #undef FILL_IN_MESH_PARAM_IF_SET
5315 }
5316
5317 static int nl80211_parse_mesh_setup(struct genl_info *info,
5318                                      struct mesh_setup *setup)
5319 {
5320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5321         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5322
5323         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5324                 return -EINVAL;
5325         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5326                              info->attrs[NL80211_ATTR_MESH_SETUP],
5327                              nl80211_mesh_setup_params_policy))
5328                 return -EINVAL;
5329
5330         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5331                 setup->sync_method =
5332                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5333                  IEEE80211_SYNC_METHOD_VENDOR :
5334                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5335
5336         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5337                 setup->path_sel_proto =
5338                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5339                  IEEE80211_PATH_PROTOCOL_VENDOR :
5340                  IEEE80211_PATH_PROTOCOL_HWMP;
5341
5342         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5343                 setup->path_metric =
5344                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5345                  IEEE80211_PATH_METRIC_VENDOR :
5346                  IEEE80211_PATH_METRIC_AIRTIME;
5347
5348
5349         if (tb[NL80211_MESH_SETUP_IE]) {
5350                 struct nlattr *ieattr =
5351                         tb[NL80211_MESH_SETUP_IE];
5352                 if (!is_valid_ie_attr(ieattr))
5353                         return -EINVAL;
5354                 setup->ie = nla_data(ieattr);
5355                 setup->ie_len = nla_len(ieattr);
5356         }
5357         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5358             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5359                 return -EINVAL;
5360         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5361         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5362         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5363         if (setup->is_secure)
5364                 setup->user_mpm = true;
5365
5366         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5367                 if (!setup->user_mpm)
5368                         return -EINVAL;
5369                 setup->auth_id =
5370                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5371         }
5372
5373         return 0;
5374 }
5375
5376 static int nl80211_update_mesh_config(struct sk_buff *skb,
5377                                       struct genl_info *info)
5378 {
5379         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5380         struct net_device *dev = info->user_ptr[1];
5381         struct wireless_dev *wdev = dev->ieee80211_ptr;
5382         struct mesh_config cfg;
5383         u32 mask;
5384         int err;
5385
5386         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5387                 return -EOPNOTSUPP;
5388
5389         if (!rdev->ops->update_mesh_config)
5390                 return -EOPNOTSUPP;
5391
5392         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5393         if (err)
5394                 return err;
5395
5396         wdev_lock(wdev);
5397         if (!wdev->mesh_id_len)
5398                 err = -ENOLINK;
5399
5400         if (!err)
5401                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5402
5403         wdev_unlock(wdev);
5404
5405         return err;
5406 }
5407
5408 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5409                               struct sk_buff *msg)
5410 {
5411         struct nlattr *nl_reg_rules;
5412         unsigned int i;
5413
5414         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5415             (regdom->dfs_region &&
5416              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5417                 goto nla_put_failure;
5418
5419         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5420         if (!nl_reg_rules)
5421                 goto nla_put_failure;
5422
5423         for (i = 0; i < regdom->n_reg_rules; i++) {
5424                 struct nlattr *nl_reg_rule;
5425                 const struct ieee80211_reg_rule *reg_rule;
5426                 const struct ieee80211_freq_range *freq_range;
5427                 const struct ieee80211_power_rule *power_rule;
5428                 unsigned int max_bandwidth_khz;
5429
5430                 reg_rule = &regdom->reg_rules[i];
5431                 freq_range = &reg_rule->freq_range;
5432                 power_rule = &reg_rule->power_rule;
5433
5434                 nl_reg_rule = nla_nest_start(msg, i);
5435                 if (!nl_reg_rule)
5436                         goto nla_put_failure;
5437
5438                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5439                 if (!max_bandwidth_khz)
5440                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5441                                                                   reg_rule);
5442
5443                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5444                                 reg_rule->flags) ||
5445                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5446                                 freq_range->start_freq_khz) ||
5447                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5448                                 freq_range->end_freq_khz) ||
5449                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5450                                 max_bandwidth_khz) ||
5451                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5452                                 power_rule->max_antenna_gain) ||
5453                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5454                                 power_rule->max_eirp) ||
5455                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5456                                 reg_rule->dfs_cac_ms))
5457                         goto nla_put_failure;
5458
5459                 nla_nest_end(msg, nl_reg_rule);
5460         }
5461
5462         nla_nest_end(msg, nl_reg_rules);
5463         return 0;
5464
5465 nla_put_failure:
5466         return -EMSGSIZE;
5467 }
5468
5469 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5470 {
5471         const struct ieee80211_regdomain *regdom = NULL;
5472         struct cfg80211_registered_device *rdev;
5473         struct wiphy *wiphy = NULL;
5474         struct sk_buff *msg;
5475         void *hdr;
5476
5477         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5478         if (!msg)
5479                 return -ENOBUFS;
5480
5481         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5482                              NL80211_CMD_GET_REG);
5483         if (!hdr)
5484                 goto put_failure;
5485
5486         if (info->attrs[NL80211_ATTR_WIPHY]) {
5487                 bool self_managed;
5488
5489                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5490                 if (IS_ERR(rdev)) {
5491                         nlmsg_free(msg);
5492                         return PTR_ERR(rdev);
5493                 }
5494
5495                 wiphy = &rdev->wiphy;
5496                 self_managed = wiphy->regulatory_flags &
5497                                REGULATORY_WIPHY_SELF_MANAGED;
5498                 regdom = get_wiphy_regdom(wiphy);
5499
5500                 /* a self-managed-reg device must have a private regdom */
5501                 if (WARN_ON(!regdom && self_managed)) {
5502                         nlmsg_free(msg);
5503                         return -EINVAL;
5504                 }
5505
5506                 if (regdom &&
5507                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5508                         goto nla_put_failure;
5509         }
5510
5511         if (!wiphy && reg_last_request_cell_base() &&
5512             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5513                         NL80211_USER_REG_HINT_CELL_BASE))
5514                 goto nla_put_failure;
5515
5516         rcu_read_lock();
5517
5518         if (!regdom)
5519                 regdom = rcu_dereference(cfg80211_regdomain);
5520
5521         if (nl80211_put_regdom(regdom, msg))
5522                 goto nla_put_failure_rcu;
5523
5524         rcu_read_unlock();
5525
5526         genlmsg_end(msg, hdr);
5527         return genlmsg_reply(msg, info);
5528
5529 nla_put_failure_rcu:
5530         rcu_read_unlock();
5531 nla_put_failure:
5532         genlmsg_cancel(msg, hdr);
5533 put_failure:
5534         nlmsg_free(msg);
5535         return -EMSGSIZE;
5536 }
5537
5538 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5539                                u32 seq, int flags, struct wiphy *wiphy,
5540                                const struct ieee80211_regdomain *regdom)
5541 {
5542         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5543                                    NL80211_CMD_GET_REG);
5544
5545         if (!hdr)
5546                 return -1;
5547
5548         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5549
5550         if (nl80211_put_regdom(regdom, msg))
5551                 goto nla_put_failure;
5552
5553         if (!wiphy && reg_last_request_cell_base() &&
5554             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5555                         NL80211_USER_REG_HINT_CELL_BASE))
5556                 goto nla_put_failure;
5557
5558         if (wiphy &&
5559             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5560                 goto nla_put_failure;
5561
5562         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5563             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5564                 goto nla_put_failure;
5565
5566         genlmsg_end(msg, hdr);
5567         return 0;
5568
5569 nla_put_failure:
5570         genlmsg_cancel(msg, hdr);
5571         return -EMSGSIZE;
5572 }
5573
5574 static int nl80211_get_reg_dump(struct sk_buff *skb,
5575                                 struct netlink_callback *cb)
5576 {
5577         const struct ieee80211_regdomain *regdom = NULL;
5578         struct cfg80211_registered_device *rdev;
5579         int err, reg_idx, start = cb->args[2];
5580
5581         rtnl_lock();
5582
5583         if (cfg80211_regdomain && start == 0) {
5584                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5585                                           NLM_F_MULTI, NULL,
5586                                           rtnl_dereference(cfg80211_regdomain));
5587                 if (err < 0)
5588                         goto out_err;
5589         }
5590
5591         /* the global regdom is idx 0 */
5592         reg_idx = 1;
5593         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5594                 regdom = get_wiphy_regdom(&rdev->wiphy);
5595                 if (!regdom)
5596                         continue;
5597
5598                 if (++reg_idx <= start)
5599                         continue;
5600
5601                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5602                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5603                 if (err < 0) {
5604                         reg_idx--;
5605                         break;
5606                 }
5607         }
5608
5609         cb->args[2] = reg_idx;
5610         err = skb->len;
5611 out_err:
5612         rtnl_unlock();
5613         return err;
5614 }
5615
5616 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5617 {
5618         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5619         struct nlattr *nl_reg_rule;
5620         char *alpha2;
5621         int rem_reg_rules, r;
5622         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5623         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5624         struct ieee80211_regdomain *rd;
5625
5626         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5627                 return -EINVAL;
5628
5629         if (!info->attrs[NL80211_ATTR_REG_RULES])
5630                 return -EINVAL;
5631
5632         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5633
5634         if (info->attrs[NL80211_ATTR_DFS_REGION])
5635                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5636
5637         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5638                             rem_reg_rules) {
5639                 num_rules++;
5640                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5641                         return -EINVAL;
5642         }
5643
5644         if (!reg_is_valid_request(alpha2))
5645                 return -EINVAL;
5646
5647         size_of_regd = sizeof(struct ieee80211_regdomain) +
5648                        num_rules * sizeof(struct ieee80211_reg_rule);
5649
5650         rd = kzalloc(size_of_regd, GFP_KERNEL);
5651         if (!rd)
5652                 return -ENOMEM;
5653
5654         rd->n_reg_rules = num_rules;
5655         rd->alpha2[0] = alpha2[0];
5656         rd->alpha2[1] = alpha2[1];
5657
5658         /*
5659          * Disable DFS master mode if the DFS region was
5660          * not supported or known on this kernel.
5661          */
5662         if (reg_supported_dfs_region(dfs_region))
5663                 rd->dfs_region = dfs_region;
5664
5665         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5666                             rem_reg_rules) {
5667                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5668                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5669                               reg_rule_policy);
5670                 if (r)
5671                         goto bad_reg;
5672                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5673                 if (r)
5674                         goto bad_reg;
5675
5676                 rule_idx++;
5677
5678                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5679                         r = -EINVAL;
5680                         goto bad_reg;
5681                 }
5682         }
5683
5684         r = set_regdom(rd, REGD_SOURCE_CRDA);
5685         /* set_regdom took ownership */
5686         rd = NULL;
5687
5688  bad_reg:
5689         kfree(rd);
5690         return r;
5691 }
5692
5693 static int validate_scan_freqs(struct nlattr *freqs)
5694 {
5695         struct nlattr *attr1, *attr2;
5696         int n_channels = 0, tmp1, tmp2;
5697
5698         nla_for_each_nested(attr1, freqs, tmp1) {
5699                 n_channels++;
5700                 /*
5701                  * Some hardware has a limited channel list for
5702                  * scanning, and it is pretty much nonsensical
5703                  * to scan for a channel twice, so disallow that
5704                  * and don't require drivers to check that the
5705                  * channel list they get isn't longer than what
5706                  * they can scan, as long as they can scan all
5707                  * the channels they registered at once.
5708                  */
5709                 nla_for_each_nested(attr2, freqs, tmp2)
5710                         if (attr1 != attr2 &&
5711                             nla_get_u32(attr1) == nla_get_u32(attr2))
5712                                 return 0;
5713         }
5714
5715         return n_channels;
5716 }
5717
5718 static int nl80211_parse_random_mac(struct nlattr **attrs,
5719                                     u8 *mac_addr, u8 *mac_addr_mask)
5720 {
5721         int i;
5722
5723         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5724                 eth_zero_addr(mac_addr);
5725                 eth_zero_addr(mac_addr_mask);
5726                 mac_addr[0] = 0x2;
5727                 mac_addr_mask[0] = 0x3;
5728
5729                 return 0;
5730         }
5731
5732         /* need both or none */
5733         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5734                 return -EINVAL;
5735
5736         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5737         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5738
5739         /* don't allow or configure an mcast address */
5740         if (!is_multicast_ether_addr(mac_addr_mask) ||
5741             is_multicast_ether_addr(mac_addr))
5742                 return -EINVAL;
5743
5744         /*
5745          * allow users to pass a MAC address that has bits set outside
5746          * of the mask, but don't bother drivers with having to deal
5747          * with such bits
5748          */
5749         for (i = 0; i < ETH_ALEN; i++)
5750                 mac_addr[i] &= mac_addr_mask[i];
5751
5752         return 0;
5753 }
5754
5755 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5756 {
5757         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5758         struct wireless_dev *wdev = info->user_ptr[1];
5759         struct cfg80211_scan_request *request;
5760         struct nlattr *attr;
5761         struct wiphy *wiphy;
5762         int err, tmp, n_ssids = 0, n_channels, i;
5763         size_t ie_len;
5764
5765         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5766                 return -EINVAL;
5767
5768         wiphy = &rdev->wiphy;
5769
5770         if (!rdev->ops->scan)
5771                 return -EOPNOTSUPP;
5772
5773         if (rdev->scan_req || rdev->scan_msg) {
5774                 err = -EBUSY;
5775                 goto unlock;
5776         }
5777
5778         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5779                 n_channels = validate_scan_freqs(
5780                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5781                 if (!n_channels) {
5782                         err = -EINVAL;
5783                         goto unlock;
5784                 }
5785         } else {
5786                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5787         }
5788
5789         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5790                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5791                         n_ssids++;
5792
5793         if (n_ssids > wiphy->max_scan_ssids) {
5794                 err = -EINVAL;
5795                 goto unlock;
5796         }
5797
5798         if (info->attrs[NL80211_ATTR_IE])
5799                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5800         else
5801                 ie_len = 0;
5802
5803         if (ie_len > wiphy->max_scan_ie_len) {
5804                 err = -EINVAL;
5805                 goto unlock;
5806         }
5807
5808         request = kzalloc(sizeof(*request)
5809                         + sizeof(*request->ssids) * n_ssids
5810                         + sizeof(*request->channels) * n_channels
5811                         + ie_len, GFP_KERNEL);
5812         if (!request) {
5813                 err = -ENOMEM;
5814                 goto unlock;
5815         }
5816
5817         if (n_ssids)
5818                 request->ssids = (void *)&request->channels[n_channels];
5819         request->n_ssids = n_ssids;
5820         if (ie_len) {
5821                 if (n_ssids)
5822                         request->ie = (void *)(request->ssids + n_ssids);
5823                 else
5824                         request->ie = (void *)(request->channels + n_channels);
5825         }
5826
5827         i = 0;
5828         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5829                 /* user specified, bail out if channel not found */
5830                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5831                         struct ieee80211_channel *chan;
5832
5833                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5834
5835                         if (!chan) {
5836                                 err = -EINVAL;
5837                                 goto out_free;
5838                         }
5839
5840                         /* ignore disabled channels */
5841                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5842                                 continue;
5843
5844                         request->channels[i] = chan;
5845                         i++;
5846                 }
5847         } else {
5848                 enum ieee80211_band band;
5849
5850                 /* all channels */
5851                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5852                         int j;
5853                         if (!wiphy->bands[band])
5854                                 continue;
5855                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5856                                 struct ieee80211_channel *chan;
5857
5858                                 chan = &wiphy->bands[band]->channels[j];
5859
5860                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5861                                         continue;
5862
5863                                 request->channels[i] = chan;
5864                                 i++;
5865                         }
5866                 }
5867         }
5868
5869         if (!i) {
5870                 err = -EINVAL;
5871                 goto out_free;
5872         }
5873
5874         request->n_channels = i;
5875
5876         i = 0;
5877         if (n_ssids) {
5878                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5879                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5880                                 err = -EINVAL;
5881                                 goto out_free;
5882                         }
5883                         request->ssids[i].ssid_len = nla_len(attr);
5884                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5885                         i++;
5886                 }
5887         }
5888
5889         if (info->attrs[NL80211_ATTR_IE]) {
5890                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5891                 memcpy((void *)request->ie,
5892                        nla_data(info->attrs[NL80211_ATTR_IE]),
5893                        request->ie_len);
5894         }
5895
5896         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5897                 if (wiphy->bands[i])
5898                         request->rates[i] =
5899                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5900
5901         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5902                 nla_for_each_nested(attr,
5903                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5904                                     tmp) {
5905                         enum ieee80211_band band = nla_type(attr);
5906
5907                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5908                                 err = -EINVAL;
5909                                 goto out_free;
5910                         }
5911
5912                         if (!wiphy->bands[band])
5913                                 continue;
5914
5915                         err = ieee80211_get_ratemask(wiphy->bands[band],
5916                                                      nla_data(attr),
5917                                                      nla_len(attr),
5918                                                      &request->rates[band]);
5919                         if (err)
5920                                 goto out_free;
5921                 }
5922         }
5923
5924         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5925                 request->flags = nla_get_u32(
5926                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5927                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5928                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5929                         err = -EOPNOTSUPP;
5930                         goto out_free;
5931                 }
5932
5933                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
5934                         if (!(wiphy->features &
5935                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
5936                                 err = -EOPNOTSUPP;
5937                                 goto out_free;
5938                         }
5939
5940                         if (wdev->current_bss) {
5941                                 err = -EOPNOTSUPP;
5942                                 goto out_free;
5943                         }
5944
5945                         err = nl80211_parse_random_mac(info->attrs,
5946                                                        request->mac_addr,
5947                                                        request->mac_addr_mask);
5948                         if (err)
5949                                 goto out_free;
5950                 }
5951         }
5952
5953         request->no_cck =
5954                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5955
5956         request->wdev = wdev;
5957         request->wiphy = &rdev->wiphy;
5958         request->scan_start = jiffies;
5959
5960         rdev->scan_req = request;
5961         err = rdev_scan(rdev, request);
5962
5963         if (!err) {
5964                 nl80211_send_scan_start(rdev, wdev);
5965                 if (wdev->netdev)
5966                         dev_hold(wdev->netdev);
5967         } else {
5968  out_free:
5969                 rdev->scan_req = NULL;
5970                 kfree(request);
5971         }
5972
5973  unlock:
5974         return err;
5975 }
5976
5977 static struct cfg80211_sched_scan_request *
5978 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
5979                          struct nlattr **attrs)
5980 {
5981         struct cfg80211_sched_scan_request *request;
5982         struct nlattr *attr;
5983         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5984         u32 interval;
5985         enum ieee80211_band band;
5986         size_t ie_len;
5987         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5988         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
5989
5990         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
5991                 return ERR_PTR(-EINVAL);
5992
5993         if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5994                 return ERR_PTR(-EINVAL);
5995
5996         interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5997         if (interval == 0)
5998                 return ERR_PTR(-EINVAL);
5999
6000         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6001                 n_channels = validate_scan_freqs(
6002                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6003                 if (!n_channels)
6004                         return ERR_PTR(-EINVAL);
6005         } else {
6006                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6007         }
6008
6009         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6010                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6011                                     tmp)
6012                         n_ssids++;
6013
6014         if (n_ssids > wiphy->max_sched_scan_ssids)
6015                 return ERR_PTR(-EINVAL);
6016
6017         /*
6018          * First, count the number of 'real' matchsets. Due to an issue with
6019          * the old implementation, matchsets containing only the RSSI attribute
6020          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6021          * RSSI for all matchsets, rather than their own matchset for reporting
6022          * all APs with a strong RSSI. This is needed to be compatible with
6023          * older userspace that treated a matchset with only the RSSI as the
6024          * global RSSI for all other matchsets - if there are other matchsets.
6025          */
6026         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6027                 nla_for_each_nested(attr,
6028                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6029                                     tmp) {
6030                         struct nlattr *rssi;
6031
6032                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6033                                         nla_data(attr), nla_len(attr),
6034                                         nl80211_match_policy);
6035                         if (err)
6036                                 return ERR_PTR(err);
6037                         /* add other standalone attributes here */
6038                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6039                                 n_match_sets++;
6040                                 continue;
6041                         }
6042                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6043                         if (rssi)
6044                                 default_match_rssi = nla_get_s32(rssi);
6045                 }
6046         }
6047
6048         /* However, if there's no other matchset, add the RSSI one */
6049         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6050                 n_match_sets = 1;
6051
6052         if (n_match_sets > wiphy->max_match_sets)
6053                 return ERR_PTR(-EINVAL);
6054
6055         if (attrs[NL80211_ATTR_IE])
6056                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6057         else
6058                 ie_len = 0;
6059
6060         if (ie_len > wiphy->max_sched_scan_ie_len)
6061                 return ERR_PTR(-EINVAL);
6062
6063         request = kzalloc(sizeof(*request)
6064                         + sizeof(*request->ssids) * n_ssids
6065                         + sizeof(*request->match_sets) * n_match_sets
6066                         + sizeof(*request->channels) * n_channels
6067                         + ie_len, GFP_KERNEL);
6068         if (!request)
6069                 return ERR_PTR(-ENOMEM);
6070
6071         if (n_ssids)
6072                 request->ssids = (void *)&request->channels[n_channels];
6073         request->n_ssids = n_ssids;
6074         if (ie_len) {
6075                 if (n_ssids)
6076                         request->ie = (void *)(request->ssids + n_ssids);
6077                 else
6078                         request->ie = (void *)(request->channels + n_channels);
6079         }
6080
6081         if (n_match_sets) {
6082                 if (request->ie)
6083                         request->match_sets = (void *)(request->ie + ie_len);
6084                 else if (n_ssids)
6085                         request->match_sets =
6086                                 (void *)(request->ssids + n_ssids);
6087                 else
6088                         request->match_sets =
6089                                 (void *)(request->channels + n_channels);
6090         }
6091         request->n_match_sets = n_match_sets;
6092
6093         i = 0;
6094         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6095                 /* user specified, bail out if channel not found */
6096                 nla_for_each_nested(attr,
6097                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6098                                     tmp) {
6099                         struct ieee80211_channel *chan;
6100
6101                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6102
6103                         if (!chan) {
6104                                 err = -EINVAL;
6105                                 goto out_free;
6106                         }
6107
6108                         /* ignore disabled channels */
6109                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6110                                 continue;
6111
6112                         request->channels[i] = chan;
6113                         i++;
6114                 }
6115         } else {
6116                 /* all channels */
6117                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6118                         int j;
6119                         if (!wiphy->bands[band])
6120                                 continue;
6121                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6122                                 struct ieee80211_channel *chan;
6123
6124                                 chan = &wiphy->bands[band]->channels[j];
6125
6126                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6127                                         continue;
6128
6129                                 request->channels[i] = chan;
6130                                 i++;
6131                         }
6132                 }
6133         }
6134
6135         if (!i) {
6136                 err = -EINVAL;
6137                 goto out_free;
6138         }
6139
6140         request->n_channels = i;
6141
6142         i = 0;
6143         if (n_ssids) {
6144                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6145                                     tmp) {
6146                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6147                                 err = -EINVAL;
6148                                 goto out_free;
6149                         }
6150                         request->ssids[i].ssid_len = nla_len(attr);
6151                         memcpy(request->ssids[i].ssid, nla_data(attr),
6152                                nla_len(attr));
6153                         i++;
6154                 }
6155         }
6156
6157         i = 0;
6158         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6159                 nla_for_each_nested(attr,
6160                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6161                                     tmp) {
6162                         struct nlattr *ssid, *rssi;
6163
6164                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6165                                         nla_data(attr), nla_len(attr),
6166                                         nl80211_match_policy);
6167                         if (err)
6168                                 goto out_free;
6169                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6170                         if (ssid) {
6171                                 if (WARN_ON(i >= n_match_sets)) {
6172                                         /* this indicates a programming error,
6173                                          * the loop above should have verified
6174                                          * things properly
6175                                          */
6176                                         err = -EINVAL;
6177                                         goto out_free;
6178                                 }
6179
6180                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6181                                         err = -EINVAL;
6182                                         goto out_free;
6183                                 }
6184                                 memcpy(request->match_sets[i].ssid.ssid,
6185                                        nla_data(ssid), nla_len(ssid));
6186                                 request->match_sets[i].ssid.ssid_len =
6187                                         nla_len(ssid);
6188                                 /* special attribute - old implemenation w/a */
6189                                 request->match_sets[i].rssi_thold =
6190                                         default_match_rssi;
6191                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6192                                 if (rssi)
6193                                         request->match_sets[i].rssi_thold =
6194                                                 nla_get_s32(rssi);
6195                         }
6196                         i++;
6197                 }
6198
6199                 /* there was no other matchset, so the RSSI one is alone */
6200                 if (i == 0 && n_match_sets)
6201                         request->match_sets[0].rssi_thold = default_match_rssi;
6202
6203                 request->min_rssi_thold = INT_MAX;
6204                 for (i = 0; i < n_match_sets; i++)
6205                         request->min_rssi_thold =
6206                                 min(request->match_sets[i].rssi_thold,
6207                                     request->min_rssi_thold);
6208         } else {
6209                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6210         }
6211
6212         if (ie_len) {
6213                 request->ie_len = ie_len;
6214                 memcpy((void *)request->ie,
6215                        nla_data(attrs[NL80211_ATTR_IE]),
6216                        request->ie_len);
6217         }
6218
6219         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6220                 request->flags = nla_get_u32(
6221                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6222                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6223                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6224                         err = -EOPNOTSUPP;
6225                         goto out_free;
6226                 }
6227
6228                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6229                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6230
6231                         if (!wdev) /* must be net-detect */
6232                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6233
6234                         if (!(wiphy->features & flg)) {
6235                                 err = -EOPNOTSUPP;
6236                                 goto out_free;
6237                         }
6238
6239                         if (wdev && wdev->current_bss) {
6240                                 err = -EOPNOTSUPP;
6241                                 goto out_free;
6242                         }
6243
6244                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6245                                                        request->mac_addr_mask);
6246                         if (err)
6247                                 goto out_free;
6248                 }
6249         }
6250
6251         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6252                 request->delay =
6253                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6254
6255         request->interval = interval;
6256         request->scan_start = jiffies;
6257
6258         return request;
6259
6260 out_free:
6261         kfree(request);
6262         return ERR_PTR(err);
6263 }
6264
6265 static int nl80211_start_sched_scan(struct sk_buff *skb,
6266                                     struct genl_info *info)
6267 {
6268         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6269         struct net_device *dev = info->user_ptr[1];
6270         struct wireless_dev *wdev = dev->ieee80211_ptr;
6271         struct cfg80211_sched_scan_request *sched_scan_req;
6272         int err;
6273
6274         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6275             !rdev->ops->sched_scan_start)
6276                 return -EOPNOTSUPP;
6277
6278         if (rdev->sched_scan_req)
6279                 return -EINPROGRESS;
6280
6281         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6282                                                   info->attrs);
6283
6284         err = PTR_ERR_OR_ZERO(sched_scan_req);
6285         if (err)
6286                 goto out_err;
6287
6288         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6289         if (err)
6290                 goto out_free;
6291
6292         sched_scan_req->dev = dev;
6293         sched_scan_req->wiphy = &rdev->wiphy;
6294
6295         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6296                 sched_scan_req->owner_nlportid = info->snd_portid;
6297
6298         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6299
6300         nl80211_send_sched_scan(rdev, dev,
6301                                 NL80211_CMD_START_SCHED_SCAN);
6302         return 0;
6303
6304 out_free:
6305         kfree(sched_scan_req);
6306 out_err:
6307         return err;
6308 }
6309
6310 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6311                                    struct genl_info *info)
6312 {
6313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6314
6315         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6316             !rdev->ops->sched_scan_stop)
6317                 return -EOPNOTSUPP;
6318
6319         return __cfg80211_stop_sched_scan(rdev, false);
6320 }
6321
6322 static int nl80211_start_radar_detection(struct sk_buff *skb,
6323                                          struct genl_info *info)
6324 {
6325         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6326         struct net_device *dev = info->user_ptr[1];
6327         struct wireless_dev *wdev = dev->ieee80211_ptr;
6328         struct cfg80211_chan_def chandef;
6329         enum nl80211_dfs_regions dfs_region;
6330         unsigned int cac_time_ms;
6331         int err;
6332
6333         dfs_region = reg_get_dfs_region(wdev->wiphy);
6334         if (dfs_region == NL80211_DFS_UNSET)
6335                 return -EINVAL;
6336
6337         err = nl80211_parse_chandef(rdev, info, &chandef);
6338         if (err)
6339                 return err;
6340
6341         if (netif_carrier_ok(dev))
6342                 return -EBUSY;
6343
6344         if (wdev->cac_started)
6345                 return -EBUSY;
6346
6347         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6348                                             wdev->iftype);
6349         if (err < 0)
6350                 return err;
6351
6352         if (err == 0)
6353                 return -EINVAL;
6354
6355         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6356                 return -EINVAL;
6357
6358         if (!rdev->ops->start_radar_detection)
6359                 return -EOPNOTSUPP;
6360
6361         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6362         if (WARN_ON(!cac_time_ms))
6363                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6364
6365         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
6366                                                cac_time_ms);
6367         if (!err) {
6368                 wdev->chandef = chandef;
6369                 wdev->cac_started = true;
6370                 wdev->cac_start_time = jiffies;
6371                 wdev->cac_time_ms = cac_time_ms;
6372         }
6373         return err;
6374 }
6375
6376 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6377 {
6378         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6379         struct net_device *dev = info->user_ptr[1];
6380         struct wireless_dev *wdev = dev->ieee80211_ptr;
6381         struct cfg80211_csa_settings params;
6382         /* csa_attrs is defined static to avoid waste of stack size - this
6383          * function is called under RTNL lock, so this should not be a problem.
6384          */
6385         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6386         int err;
6387         bool need_new_beacon = false;
6388         int len, i;
6389         u32 cs_count;
6390
6391         if (!rdev->ops->channel_switch ||
6392             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6393                 return -EOPNOTSUPP;
6394
6395         switch (dev->ieee80211_ptr->iftype) {
6396         case NL80211_IFTYPE_AP:
6397         case NL80211_IFTYPE_P2P_GO:
6398                 need_new_beacon = true;
6399
6400                 /* useless if AP is not running */
6401                 if (!wdev->beacon_interval)
6402                         return -ENOTCONN;
6403                 break;
6404         case NL80211_IFTYPE_ADHOC:
6405                 if (!wdev->ssid_len)
6406                         return -ENOTCONN;
6407                 break;
6408         case NL80211_IFTYPE_MESH_POINT:
6409                 if (!wdev->mesh_id_len)
6410                         return -ENOTCONN;
6411                 break;
6412         default:
6413                 return -EOPNOTSUPP;
6414         }
6415
6416         memset(&params, 0, sizeof(params));
6417
6418         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6419             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6420                 return -EINVAL;
6421
6422         /* only important for AP, IBSS and mesh create IEs internally */
6423         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6424                 return -EINVAL;
6425
6426         /* Even though the attribute is u32, the specification says
6427          * u8, so let's make sure we don't overflow.
6428          */
6429         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6430         if (cs_count > 255)
6431                 return -EINVAL;
6432
6433         params.count = cs_count;
6434
6435         if (!need_new_beacon)
6436                 goto skip_beacons;
6437
6438         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6439         if (err)
6440                 return err;
6441
6442         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6443                                info->attrs[NL80211_ATTR_CSA_IES],
6444                                nl80211_policy);
6445         if (err)
6446                 return err;
6447
6448         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6449         if (err)
6450                 return err;
6451
6452         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6453                 return -EINVAL;
6454
6455         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6456         if (!len || (len % sizeof(u16)))
6457                 return -EINVAL;
6458
6459         params.n_counter_offsets_beacon = len / sizeof(u16);
6460         if (rdev->wiphy.max_num_csa_counters &&
6461             (params.n_counter_offsets_beacon >
6462              rdev->wiphy.max_num_csa_counters))
6463                 return -EINVAL;
6464
6465         params.counter_offsets_beacon =
6466                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6467
6468         /* sanity checks - counters should fit and be the same */
6469         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6470                 u16 offset = params.counter_offsets_beacon[i];
6471
6472                 if (offset >= params.beacon_csa.tail_len)
6473                         return -EINVAL;
6474
6475                 if (params.beacon_csa.tail[offset] != params.count)
6476                         return -EINVAL;
6477         }
6478
6479         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6480                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6481                 if (!len || (len % sizeof(u16)))
6482                         return -EINVAL;
6483
6484                 params.n_counter_offsets_presp = len / sizeof(u16);
6485                 if (rdev->wiphy.max_num_csa_counters &&
6486                     (params.n_counter_offsets_beacon >
6487                      rdev->wiphy.max_num_csa_counters))
6488                         return -EINVAL;
6489
6490                 params.counter_offsets_presp =
6491                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6492
6493                 /* sanity checks - counters should fit and be the same */
6494                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6495                         u16 offset = params.counter_offsets_presp[i];
6496
6497                         if (offset >= params.beacon_csa.probe_resp_len)
6498                                 return -EINVAL;
6499
6500                         if (params.beacon_csa.probe_resp[offset] !=
6501                             params.count)
6502                                 return -EINVAL;
6503                 }
6504         }
6505
6506 skip_beacons:
6507         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6508         if (err)
6509                 return err;
6510
6511         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6512                                            wdev->iftype))
6513                 return -EINVAL;
6514
6515         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6516                                             &params.chandef,
6517                                             wdev->iftype);
6518         if (err < 0)
6519                 return err;
6520
6521         if (err > 0)
6522                 params.radar_required = true;
6523
6524         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6525                 params.block_tx = true;
6526
6527         wdev_lock(wdev);
6528         err = rdev_channel_switch(rdev, dev, &params);
6529         wdev_unlock(wdev);
6530
6531         return err;
6532 }
6533
6534 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6535                             u32 seq, int flags,
6536                             struct cfg80211_registered_device *rdev,
6537                             struct wireless_dev *wdev,
6538                             struct cfg80211_internal_bss *intbss)
6539 {
6540         struct cfg80211_bss *res = &intbss->pub;
6541         const struct cfg80211_bss_ies *ies;
6542         void *hdr;
6543         struct nlattr *bss;
6544
6545         ASSERT_WDEV_LOCK(wdev);
6546
6547         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6548                              NL80211_CMD_NEW_SCAN_RESULTS);
6549         if (!hdr)
6550                 return -1;
6551
6552         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6553
6554         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6555                 goto nla_put_failure;
6556         if (wdev->netdev &&
6557             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6558                 goto nla_put_failure;
6559         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6560                 goto nla_put_failure;
6561
6562         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6563         if (!bss)
6564                 goto nla_put_failure;
6565         if ((!is_zero_ether_addr(res->bssid) &&
6566              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6567                 goto nla_put_failure;
6568
6569         rcu_read_lock();
6570         /* indicate whether we have probe response data or not */
6571         if (rcu_access_pointer(res->proberesp_ies) &&
6572             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6573                 goto fail_unlock_rcu;
6574
6575         /* this pointer prefers to be pointed to probe response data
6576          * but is always valid
6577          */
6578         ies = rcu_dereference(res->ies);
6579         if (ies) {
6580                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6581                         goto fail_unlock_rcu;
6582                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6583                                         ies->len, ies->data))
6584                         goto fail_unlock_rcu;
6585         }
6586
6587         /* and this pointer is always (unless driver didn't know) beacon data */
6588         ies = rcu_dereference(res->beacon_ies);
6589         if (ies && ies->from_beacon) {
6590                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6591                         goto fail_unlock_rcu;
6592                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6593                                         ies->len, ies->data))
6594                         goto fail_unlock_rcu;
6595         }
6596         rcu_read_unlock();
6597
6598         if (res->beacon_interval &&
6599             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6600                 goto nla_put_failure;
6601         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6602             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6603             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6604             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6605                         jiffies_to_msecs(jiffies - intbss->ts)))
6606                 goto nla_put_failure;
6607
6608         if (intbss->ts_boottime &&
6609             nla_put_u64(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6610                         intbss->ts_boottime))
6611                 goto nla_put_failure;
6612
6613         switch (rdev->wiphy.signal_type) {
6614         case CFG80211_SIGNAL_TYPE_MBM:
6615                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6616                         goto nla_put_failure;
6617                 break;
6618         case CFG80211_SIGNAL_TYPE_UNSPEC:
6619                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6620                         goto nla_put_failure;
6621                 break;
6622         default:
6623                 break;
6624         }
6625
6626         switch (wdev->iftype) {
6627         case NL80211_IFTYPE_P2P_CLIENT:
6628         case NL80211_IFTYPE_STATION:
6629                 if (intbss == wdev->current_bss &&
6630                     nla_put_u32(msg, NL80211_BSS_STATUS,
6631                                 NL80211_BSS_STATUS_ASSOCIATED))
6632                         goto nla_put_failure;
6633                 break;
6634         case NL80211_IFTYPE_ADHOC:
6635                 if (intbss == wdev->current_bss &&
6636                     nla_put_u32(msg, NL80211_BSS_STATUS,
6637                                 NL80211_BSS_STATUS_IBSS_JOINED))
6638                         goto nla_put_failure;
6639                 break;
6640         default:
6641                 break;
6642         }
6643
6644         nla_nest_end(msg, bss);
6645
6646         genlmsg_end(msg, hdr);
6647         return 0;
6648
6649  fail_unlock_rcu:
6650         rcu_read_unlock();
6651  nla_put_failure:
6652         genlmsg_cancel(msg, hdr);
6653         return -EMSGSIZE;
6654 }
6655
6656 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6657 {
6658         struct cfg80211_registered_device *rdev;
6659         struct cfg80211_internal_bss *scan;
6660         struct wireless_dev *wdev;
6661         int start = cb->args[2], idx = 0;
6662         int err;
6663
6664         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6665         if (err)
6666                 return err;
6667
6668         wdev_lock(wdev);
6669         spin_lock_bh(&rdev->bss_lock);
6670         cfg80211_bss_expire(rdev);
6671
6672         cb->seq = rdev->bss_generation;
6673
6674         list_for_each_entry(scan, &rdev->bss_list, list) {
6675                 if (++idx <= start)
6676                         continue;
6677                 if (nl80211_send_bss(skb, cb,
6678                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6679                                 rdev, wdev, scan) < 0) {
6680                         idx--;
6681                         break;
6682                 }
6683         }
6684
6685         spin_unlock_bh(&rdev->bss_lock);
6686         wdev_unlock(wdev);
6687
6688         cb->args[2] = idx;
6689         nl80211_finish_wdev_dump(rdev);
6690
6691         return skb->len;
6692 }
6693
6694 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6695                                int flags, struct net_device *dev,
6696                                bool allow_radio_stats,
6697                                struct survey_info *survey)
6698 {
6699         void *hdr;
6700         struct nlattr *infoattr;
6701
6702         /* skip radio stats if userspace didn't request them */
6703         if (!survey->channel && !allow_radio_stats)
6704                 return 0;
6705
6706         hdr = nl80211hdr_put(msg, portid, seq, flags,
6707                              NL80211_CMD_NEW_SURVEY_RESULTS);
6708         if (!hdr)
6709                 return -ENOMEM;
6710
6711         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6712                 goto nla_put_failure;
6713
6714         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6715         if (!infoattr)
6716                 goto nla_put_failure;
6717
6718         if (survey->channel &&
6719             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6720                         survey->channel->center_freq))
6721                 goto nla_put_failure;
6722
6723         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6724             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6725                 goto nla_put_failure;
6726         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6727             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6728                 goto nla_put_failure;
6729         if ((survey->filled & SURVEY_INFO_TIME) &&
6730             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME,
6731                         survey->time))
6732                 goto nla_put_failure;
6733         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
6734             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_BUSY,
6735                         survey->time_busy))
6736                 goto nla_put_failure;
6737         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
6738             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
6739                         survey->time_ext_busy))
6740                 goto nla_put_failure;
6741         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
6742             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_RX,
6743                         survey->time_rx))
6744                 goto nla_put_failure;
6745         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
6746             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_TX,
6747                         survey->time_tx))
6748                 goto nla_put_failure;
6749         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
6750             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_SCAN,
6751                         survey->time_scan))
6752                 goto nla_put_failure;
6753
6754         nla_nest_end(msg, infoattr);
6755
6756         genlmsg_end(msg, hdr);
6757         return 0;
6758
6759  nla_put_failure:
6760         genlmsg_cancel(msg, hdr);
6761         return -EMSGSIZE;
6762 }
6763
6764 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
6765 {
6766         struct survey_info survey;
6767         struct cfg80211_registered_device *rdev;
6768         struct wireless_dev *wdev;
6769         int survey_idx = cb->args[2];
6770         int res;
6771         bool radio_stats;
6772
6773         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6774         if (res)
6775                 return res;
6776
6777         /* prepare_wdev_dump parsed the attributes */
6778         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
6779
6780         if (!wdev->netdev) {
6781                 res = -EINVAL;
6782                 goto out_err;
6783         }
6784
6785         if (!rdev->ops->dump_survey) {
6786                 res = -EOPNOTSUPP;
6787                 goto out_err;
6788         }
6789
6790         while (1) {
6791                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6792                 if (res == -ENOENT)
6793                         break;
6794                 if (res)
6795                         goto out_err;
6796
6797                 /* don't send disabled channels, but do send non-channel data */
6798                 if (survey.channel &&
6799                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
6800                         survey_idx++;
6801                         continue;
6802                 }
6803
6804                 if (nl80211_send_survey(skb,
6805                                 NETLINK_CB(cb->skb).portid,
6806                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6807                                 wdev->netdev, radio_stats, &survey) < 0)
6808                         goto out;
6809                 survey_idx++;
6810         }
6811
6812  out:
6813         cb->args[2] = survey_idx;
6814         res = skb->len;
6815  out_err:
6816         nl80211_finish_wdev_dump(rdev);
6817         return res;
6818 }
6819
6820 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6821 {
6822         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6823                                   NL80211_WPA_VERSION_2));
6824 }
6825
6826 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6827 {
6828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6829         struct net_device *dev = info->user_ptr[1];
6830         struct ieee80211_channel *chan;
6831         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6832         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6833         enum nl80211_auth_type auth_type;
6834         struct key_parse key;
6835         bool local_state_change;
6836
6837         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6838                 return -EINVAL;
6839
6840         if (!info->attrs[NL80211_ATTR_MAC])
6841                 return -EINVAL;
6842
6843         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6844                 return -EINVAL;
6845
6846         if (!info->attrs[NL80211_ATTR_SSID])
6847                 return -EINVAL;
6848
6849         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6850                 return -EINVAL;
6851
6852         err = nl80211_parse_key(info, &key);
6853         if (err)
6854                 return err;
6855
6856         if (key.idx >= 0) {
6857                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6858                         return -EINVAL;
6859                 if (!key.p.key || !key.p.key_len)
6860                         return -EINVAL;
6861                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6862                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6863                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6864                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6865                         return -EINVAL;
6866                 if (key.idx > 4)
6867                         return -EINVAL;
6868         } else {
6869                 key.p.key_len = 0;
6870                 key.p.key = NULL;
6871         }
6872
6873         if (key.idx >= 0) {
6874                 int i;
6875                 bool ok = false;
6876                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6877                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6878                                 ok = true;
6879                                 break;
6880                         }
6881                 }
6882                 if (!ok)
6883                         return -EINVAL;
6884         }
6885
6886         if (!rdev->ops->auth)
6887                 return -EOPNOTSUPP;
6888
6889         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6890             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6891                 return -EOPNOTSUPP;
6892
6893         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6894         chan = nl80211_get_valid_chan(&rdev->wiphy,
6895                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6896         if (!chan)
6897                 return -EINVAL;
6898
6899         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6900         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6901
6902         if (info->attrs[NL80211_ATTR_IE]) {
6903                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6904                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6905         }
6906
6907         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6908         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6909                 return -EINVAL;
6910
6911         if (auth_type == NL80211_AUTHTYPE_SAE &&
6912             !info->attrs[NL80211_ATTR_SAE_DATA])
6913                 return -EINVAL;
6914
6915         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6916                 if (auth_type != NL80211_AUTHTYPE_SAE)
6917                         return -EINVAL;
6918                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6919                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6920                 /* need to include at least Auth Transaction and Status Code */
6921                 if (sae_data_len < 4)
6922                         return -EINVAL;
6923         }
6924
6925         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6926
6927         /*
6928          * Since we no longer track auth state, ignore
6929          * requests to only change local state.
6930          */
6931         if (local_state_change)
6932                 return 0;
6933
6934         wdev_lock(dev->ieee80211_ptr);
6935         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6936                                  ssid, ssid_len, ie, ie_len,
6937                                  key.p.key, key.p.key_len, key.idx,
6938                                  sae_data, sae_data_len);
6939         wdev_unlock(dev->ieee80211_ptr);
6940         return err;
6941 }
6942
6943 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6944                                    struct genl_info *info,
6945                                    struct cfg80211_crypto_settings *settings,
6946                                    int cipher_limit)
6947 {
6948         memset(settings, 0, sizeof(*settings));
6949
6950         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6951
6952         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6953                 u16 proto;
6954                 proto = nla_get_u16(
6955                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6956                 settings->control_port_ethertype = cpu_to_be16(proto);
6957                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6958                     proto != ETH_P_PAE)
6959                         return -EINVAL;
6960                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6961                         settings->control_port_no_encrypt = true;
6962         } else
6963                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6964
6965         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6966                 void *data;
6967                 int len, i;
6968
6969                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6970                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6971                 settings->n_ciphers_pairwise = len / sizeof(u32);
6972
6973                 if (len % sizeof(u32))
6974                         return -EINVAL;
6975
6976                 if (settings->n_ciphers_pairwise > cipher_limit)
6977                         return -EINVAL;
6978
6979                 memcpy(settings->ciphers_pairwise, data, len);
6980
6981                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6982                         if (!cfg80211_supported_cipher_suite(
6983                                         &rdev->wiphy,
6984                                         settings->ciphers_pairwise[i]))
6985                                 return -EINVAL;
6986         }
6987
6988         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6989                 settings->cipher_group =
6990                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6991                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6992                                                      settings->cipher_group))
6993                         return -EINVAL;
6994         }
6995
6996         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6997                 settings->wpa_versions =
6998                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6999                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7000                         return -EINVAL;
7001         }
7002
7003         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7004                 void *data;
7005                 int len;
7006
7007                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7008                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7009                 settings->n_akm_suites = len / sizeof(u32);
7010
7011                 if (len % sizeof(u32))
7012                         return -EINVAL;
7013
7014                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7015                         return -EINVAL;
7016
7017                 memcpy(settings->akm_suites, data, len);
7018         }
7019
7020         return 0;
7021 }
7022
7023 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7024 {
7025         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7026         struct net_device *dev = info->user_ptr[1];
7027         struct ieee80211_channel *chan;
7028         struct cfg80211_assoc_request req = {};
7029         const u8 *bssid, *ssid;
7030         int err, ssid_len = 0;
7031
7032         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7033                 return -EINVAL;
7034
7035         if (!info->attrs[NL80211_ATTR_MAC] ||
7036             !info->attrs[NL80211_ATTR_SSID] ||
7037             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7038                 return -EINVAL;
7039
7040         if (!rdev->ops->assoc)
7041                 return -EOPNOTSUPP;
7042
7043         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7044             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7045                 return -EOPNOTSUPP;
7046
7047         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7048
7049         chan = nl80211_get_valid_chan(&rdev->wiphy,
7050                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7051         if (!chan)
7052                 return -EINVAL;
7053
7054         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7055         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7056
7057         if (info->attrs[NL80211_ATTR_IE]) {
7058                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7059                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7060         }
7061
7062         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7063                 enum nl80211_mfp mfp =
7064                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7065                 if (mfp == NL80211_MFP_REQUIRED)
7066                         req.use_mfp = true;
7067                 else if (mfp != NL80211_MFP_NO)
7068                         return -EINVAL;
7069         }
7070
7071         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7072                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7073
7074         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7075                 req.flags |= ASSOC_REQ_DISABLE_HT;
7076
7077         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7078                 memcpy(&req.ht_capa_mask,
7079                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7080                        sizeof(req.ht_capa_mask));
7081
7082         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7083                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7084                         return -EINVAL;
7085                 memcpy(&req.ht_capa,
7086                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7087                        sizeof(req.ht_capa));
7088         }
7089
7090         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7091                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7092
7093         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7094                 memcpy(&req.vht_capa_mask,
7095                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7096                        sizeof(req.vht_capa_mask));
7097
7098         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7099                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7100                         return -EINVAL;
7101                 memcpy(&req.vht_capa,
7102                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7103                        sizeof(req.vht_capa));
7104         }
7105
7106         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7107                 if (!(rdev->wiphy.features &
7108                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7109                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7110                         return -EINVAL;
7111                 req.flags |= ASSOC_REQ_USE_RRM;
7112         }
7113
7114         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7115         if (!err) {
7116                 wdev_lock(dev->ieee80211_ptr);
7117                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7118                                           ssid, ssid_len, &req);
7119                 wdev_unlock(dev->ieee80211_ptr);
7120         }
7121
7122         return err;
7123 }
7124
7125 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7126 {
7127         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7128         struct net_device *dev = info->user_ptr[1];
7129         const u8 *ie = NULL, *bssid;
7130         int ie_len = 0, err;
7131         u16 reason_code;
7132         bool local_state_change;
7133
7134         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7135                 return -EINVAL;
7136
7137         if (!info->attrs[NL80211_ATTR_MAC])
7138                 return -EINVAL;
7139
7140         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7141                 return -EINVAL;
7142
7143         if (!rdev->ops->deauth)
7144                 return -EOPNOTSUPP;
7145
7146         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7147             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7148                 return -EOPNOTSUPP;
7149
7150         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7151
7152         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7153         if (reason_code == 0) {
7154                 /* Reason Code 0 is reserved */
7155                 return -EINVAL;
7156         }
7157
7158         if (info->attrs[NL80211_ATTR_IE]) {
7159                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7160                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7161         }
7162
7163         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7164
7165         wdev_lock(dev->ieee80211_ptr);
7166         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7167                                    local_state_change);
7168         wdev_unlock(dev->ieee80211_ptr);
7169         return err;
7170 }
7171
7172 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7173 {
7174         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7175         struct net_device *dev = info->user_ptr[1];
7176         const u8 *ie = NULL, *bssid;
7177         int ie_len = 0, err;
7178         u16 reason_code;
7179         bool local_state_change;
7180
7181         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7182                 return -EINVAL;
7183
7184         if (!info->attrs[NL80211_ATTR_MAC])
7185                 return -EINVAL;
7186
7187         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7188                 return -EINVAL;
7189
7190         if (!rdev->ops->disassoc)
7191                 return -EOPNOTSUPP;
7192
7193         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7194             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7195                 return -EOPNOTSUPP;
7196
7197         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7198
7199         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7200         if (reason_code == 0) {
7201                 /* Reason Code 0 is reserved */
7202                 return -EINVAL;
7203         }
7204
7205         if (info->attrs[NL80211_ATTR_IE]) {
7206                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7207                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7208         }
7209
7210         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7211
7212         wdev_lock(dev->ieee80211_ptr);
7213         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7214                                      local_state_change);
7215         wdev_unlock(dev->ieee80211_ptr);
7216         return err;
7217 }
7218
7219 static bool
7220 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7221                          int mcast_rate[IEEE80211_NUM_BANDS],
7222                          int rateval)
7223 {
7224         struct wiphy *wiphy = &rdev->wiphy;
7225         bool found = false;
7226         int band, i;
7227
7228         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7229                 struct ieee80211_supported_band *sband;
7230
7231                 sband = wiphy->bands[band];
7232                 if (!sband)
7233                         continue;
7234
7235                 for (i = 0; i < sband->n_bitrates; i++) {
7236                         if (sband->bitrates[i].bitrate == rateval) {
7237                                 mcast_rate[band] = i + 1;
7238                                 found = true;
7239                                 break;
7240                         }
7241                 }
7242         }
7243
7244         return found;
7245 }
7246
7247 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7248 {
7249         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7250         struct net_device *dev = info->user_ptr[1];
7251         struct cfg80211_ibss_params ibss;
7252         struct wiphy *wiphy;
7253         struct cfg80211_cached_keys *connkeys = NULL;
7254         int err;
7255
7256         memset(&ibss, 0, sizeof(ibss));
7257
7258         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7259                 return -EINVAL;
7260
7261         if (!info->attrs[NL80211_ATTR_SSID] ||
7262             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7263                 return -EINVAL;
7264
7265         ibss.beacon_interval = 100;
7266
7267         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7268                 ibss.beacon_interval =
7269                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7270                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7271                         return -EINVAL;
7272         }
7273
7274         if (!rdev->ops->join_ibss)
7275                 return -EOPNOTSUPP;
7276
7277         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7278                 return -EOPNOTSUPP;
7279
7280         wiphy = &rdev->wiphy;
7281
7282         if (info->attrs[NL80211_ATTR_MAC]) {
7283                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7284
7285                 if (!is_valid_ether_addr(ibss.bssid))
7286                         return -EINVAL;
7287         }
7288         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7289         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7290
7291         if (info->attrs[NL80211_ATTR_IE]) {
7292                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7293                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7294         }
7295
7296         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7297         if (err)
7298                 return err;
7299
7300         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7301                                      NL80211_IFTYPE_ADHOC))
7302                 return -EINVAL;
7303
7304         switch (ibss.chandef.width) {
7305         case NL80211_CHAN_WIDTH_5:
7306         case NL80211_CHAN_WIDTH_10:
7307         case NL80211_CHAN_WIDTH_20_NOHT:
7308                 break;
7309         case NL80211_CHAN_WIDTH_20:
7310         case NL80211_CHAN_WIDTH_40:
7311                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7312                         return -EINVAL;
7313                 break;
7314         case NL80211_CHAN_WIDTH_80:
7315         case NL80211_CHAN_WIDTH_80P80:
7316         case NL80211_CHAN_WIDTH_160:
7317                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7318                         return -EINVAL;
7319                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7320                                              NL80211_EXT_FEATURE_VHT_IBSS))
7321                         return -EINVAL;
7322                 break;
7323         default:
7324                 return -EINVAL;
7325         }
7326
7327         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7328         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7329
7330         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7331                 u8 *rates =
7332                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7333                 int n_rates =
7334                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7335                 struct ieee80211_supported_band *sband =
7336                         wiphy->bands[ibss.chandef.chan->band];
7337
7338                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7339                                              &ibss.basic_rates);
7340                 if (err)
7341                         return err;
7342         }
7343
7344         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7345                 memcpy(&ibss.ht_capa_mask,
7346                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7347                        sizeof(ibss.ht_capa_mask));
7348
7349         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7350                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7351                         return -EINVAL;
7352                 memcpy(&ibss.ht_capa,
7353                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7354                        sizeof(ibss.ht_capa));
7355         }
7356
7357         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7358             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7359                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7360                 return -EINVAL;
7361
7362         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7363                 bool no_ht = false;
7364
7365                 connkeys = nl80211_parse_connkeys(rdev,
7366                                           info->attrs[NL80211_ATTR_KEYS],
7367                                           &no_ht);
7368                 if (IS_ERR(connkeys))
7369                         return PTR_ERR(connkeys);
7370
7371                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7372                     no_ht) {
7373                         kfree(connkeys);
7374                         return -EINVAL;
7375                 }
7376         }
7377
7378         ibss.control_port =
7379                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7380
7381         ibss.userspace_handles_dfs =
7382                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7383
7384         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7385         if (err)
7386                 kzfree(connkeys);
7387         return err;
7388 }
7389
7390 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7391 {
7392         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7393         struct net_device *dev = info->user_ptr[1];
7394
7395         if (!rdev->ops->leave_ibss)
7396                 return -EOPNOTSUPP;
7397
7398         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7399                 return -EOPNOTSUPP;
7400
7401         return cfg80211_leave_ibss(rdev, dev, false);
7402 }
7403
7404 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7405 {
7406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7407         struct net_device *dev = info->user_ptr[1];
7408         int mcast_rate[IEEE80211_NUM_BANDS];
7409         u32 nla_rate;
7410         int err;
7411
7412         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7413             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7414             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7415                 return -EOPNOTSUPP;
7416
7417         if (!rdev->ops->set_mcast_rate)
7418                 return -EOPNOTSUPP;
7419
7420         memset(mcast_rate, 0, sizeof(mcast_rate));
7421
7422         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7423                 return -EINVAL;
7424
7425         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7426         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7427                 return -EINVAL;
7428
7429         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
7430
7431         return err;
7432 }
7433
7434 static struct sk_buff *
7435 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7436                             struct wireless_dev *wdev, int approxlen,
7437                             u32 portid, u32 seq, enum nl80211_commands cmd,
7438                             enum nl80211_attrs attr,
7439                             const struct nl80211_vendor_cmd_info *info,
7440                             gfp_t gfp)
7441 {
7442         struct sk_buff *skb;
7443         void *hdr;
7444         struct nlattr *data;
7445
7446         skb = nlmsg_new(approxlen + 100, gfp);
7447         if (!skb)
7448                 return NULL;
7449
7450         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7451         if (!hdr) {
7452                 kfree_skb(skb);
7453                 return NULL;
7454         }
7455
7456         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7457                 goto nla_put_failure;
7458
7459         if (info) {
7460                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7461                                 info->vendor_id))
7462                         goto nla_put_failure;
7463                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7464                                 info->subcmd))
7465                         goto nla_put_failure;
7466         }
7467
7468         if (wdev) {
7469                 if (nla_put_u64(skb, NL80211_ATTR_WDEV,
7470                                 wdev_id(wdev)))
7471                         goto nla_put_failure;
7472                 if (wdev->netdev &&
7473                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7474                                 wdev->netdev->ifindex))
7475                         goto nla_put_failure;
7476         }
7477
7478         data = nla_nest_start(skb, attr);
7479
7480         ((void **)skb->cb)[0] = rdev;
7481         ((void **)skb->cb)[1] = hdr;
7482         ((void **)skb->cb)[2] = data;
7483
7484         return skb;
7485
7486  nla_put_failure:
7487         kfree_skb(skb);
7488         return NULL;
7489 }
7490
7491 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7492                                            struct wireless_dev *wdev,
7493                                            enum nl80211_commands cmd,
7494                                            enum nl80211_attrs attr,
7495                                            int vendor_event_idx,
7496                                            int approxlen, gfp_t gfp)
7497 {
7498         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7499         const struct nl80211_vendor_cmd_info *info;
7500
7501         switch (cmd) {
7502         case NL80211_CMD_TESTMODE:
7503                 if (WARN_ON(vendor_event_idx != -1))
7504                         return NULL;
7505                 info = NULL;
7506                 break;
7507         case NL80211_CMD_VENDOR:
7508                 if (WARN_ON(vendor_event_idx < 0 ||
7509                             vendor_event_idx >= wiphy->n_vendor_events))
7510                         return NULL;
7511                 info = &wiphy->vendor_events[vendor_event_idx];
7512                 break;
7513         default:
7514                 WARN_ON(1);
7515                 return NULL;
7516         }
7517
7518         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7519                                            cmd, attr, info, gfp);
7520 }
7521 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7522
7523 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7524 {
7525         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7526         void *hdr = ((void **)skb->cb)[1];
7527         struct nlattr *data = ((void **)skb->cb)[2];
7528         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7529
7530         /* clear CB data for netlink core to own from now on */
7531         memset(skb->cb, 0, sizeof(skb->cb));
7532
7533         nla_nest_end(skb, data);
7534         genlmsg_end(skb, hdr);
7535
7536         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7537                 mcgrp = NL80211_MCGRP_VENDOR;
7538
7539         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7540                                 mcgrp, gfp);
7541 }
7542 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7543
7544 #ifdef CONFIG_NL80211_TESTMODE
7545 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7546 {
7547         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7548         struct wireless_dev *wdev =
7549                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7550         int err;
7551
7552         if (!rdev->ops->testmode_cmd)
7553                 return -EOPNOTSUPP;
7554
7555         if (IS_ERR(wdev)) {
7556                 err = PTR_ERR(wdev);
7557                 if (err != -EINVAL)
7558                         return err;
7559                 wdev = NULL;
7560         } else if (wdev->wiphy != &rdev->wiphy) {
7561                 return -EINVAL;
7562         }
7563
7564         if (!info->attrs[NL80211_ATTR_TESTDATA])
7565                 return -EINVAL;
7566
7567         rdev->cur_cmd_info = info;
7568         err = rdev_testmode_cmd(rdev, wdev,
7569                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7570                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7571         rdev->cur_cmd_info = NULL;
7572
7573         return err;
7574 }
7575
7576 static int nl80211_testmode_dump(struct sk_buff *skb,
7577                                  struct netlink_callback *cb)
7578 {
7579         struct cfg80211_registered_device *rdev;
7580         int err;
7581         long phy_idx;
7582         void *data = NULL;
7583         int data_len = 0;
7584
7585         rtnl_lock();
7586
7587         if (cb->args[0]) {
7588                 /*
7589                  * 0 is a valid index, but not valid for args[0],
7590                  * so we need to offset by 1.
7591                  */
7592                 phy_idx = cb->args[0] - 1;
7593         } else {
7594                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7595                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7596                                   nl80211_policy);
7597                 if (err)
7598                         goto out_err;
7599
7600                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7601                                                   nl80211_fam.attrbuf);
7602                 if (IS_ERR(rdev)) {
7603                         err = PTR_ERR(rdev);
7604                         goto out_err;
7605                 }
7606                 phy_idx = rdev->wiphy_idx;
7607                 rdev = NULL;
7608
7609                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7610                         cb->args[1] =
7611                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7612         }
7613
7614         if (cb->args[1]) {
7615                 data = nla_data((void *)cb->args[1]);
7616                 data_len = nla_len((void *)cb->args[1]);
7617         }
7618
7619         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7620         if (!rdev) {
7621                 err = -ENOENT;
7622                 goto out_err;
7623         }
7624
7625         if (!rdev->ops->testmode_dump) {
7626                 err = -EOPNOTSUPP;
7627                 goto out_err;
7628         }
7629
7630         while (1) {
7631                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7632                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7633                                            NL80211_CMD_TESTMODE);
7634                 struct nlattr *tmdata;
7635
7636                 if (!hdr)
7637                         break;
7638
7639                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7640                         genlmsg_cancel(skb, hdr);
7641                         break;
7642                 }
7643
7644                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7645                 if (!tmdata) {
7646                         genlmsg_cancel(skb, hdr);
7647                         break;
7648                 }
7649                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7650                 nla_nest_end(skb, tmdata);
7651
7652                 if (err == -ENOBUFS || err == -ENOENT) {
7653                         genlmsg_cancel(skb, hdr);
7654                         break;
7655                 } else if (err) {
7656                         genlmsg_cancel(skb, hdr);
7657                         goto out_err;
7658                 }
7659
7660                 genlmsg_end(skb, hdr);
7661         }
7662
7663         err = skb->len;
7664         /* see above */
7665         cb->args[0] = phy_idx + 1;
7666  out_err:
7667         rtnl_unlock();
7668         return err;
7669 }
7670 #endif
7671
7672 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7673 {
7674         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7675         struct net_device *dev = info->user_ptr[1];
7676         struct cfg80211_connect_params connect;
7677         struct wiphy *wiphy;
7678         struct cfg80211_cached_keys *connkeys = NULL;
7679         int err;
7680
7681         memset(&connect, 0, sizeof(connect));
7682
7683         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7684                 return -EINVAL;
7685
7686         if (!info->attrs[NL80211_ATTR_SSID] ||
7687             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7688                 return -EINVAL;
7689
7690         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7691                 connect.auth_type =
7692                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7693                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7694                                              NL80211_CMD_CONNECT))
7695                         return -EINVAL;
7696         } else
7697                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7698
7699         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7700
7701         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7702                                       NL80211_MAX_NR_CIPHER_SUITES);
7703         if (err)
7704                 return err;
7705
7706         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7707             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7708                 return -EOPNOTSUPP;
7709
7710         wiphy = &rdev->wiphy;
7711
7712         connect.bg_scan_period = -1;
7713         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7714                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7715                 connect.bg_scan_period =
7716                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7717         }
7718
7719         if (info->attrs[NL80211_ATTR_MAC])
7720                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7721         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7722                 connect.bssid_hint =
7723                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7724         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7725         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7726
7727         if (info->attrs[NL80211_ATTR_IE]) {
7728                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7729                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7730         }
7731
7732         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7733                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7734                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7735                     connect.mfp != NL80211_MFP_NO)
7736                         return -EINVAL;
7737         } else {
7738                 connect.mfp = NL80211_MFP_NO;
7739         }
7740
7741         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7742                 connect.channel = nl80211_get_valid_chan(
7743                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7744                 if (!connect.channel)
7745                         return -EINVAL;
7746         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7747                 connect.channel_hint = nl80211_get_valid_chan(
7748                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7749                 if (!connect.channel_hint)
7750                         return -EINVAL;
7751         }
7752
7753         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7754                 connkeys = nl80211_parse_connkeys(rdev,
7755                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7756                 if (IS_ERR(connkeys))
7757                         return PTR_ERR(connkeys);
7758         }
7759
7760         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7761                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7762
7763         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7764                 memcpy(&connect.ht_capa_mask,
7765                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7766                        sizeof(connect.ht_capa_mask));
7767
7768         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7769                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7770                         kzfree(connkeys);
7771                         return -EINVAL;
7772                 }
7773                 memcpy(&connect.ht_capa,
7774                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7775                        sizeof(connect.ht_capa));
7776         }
7777
7778         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7779                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7780
7781         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7782                 memcpy(&connect.vht_capa_mask,
7783                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7784                        sizeof(connect.vht_capa_mask));
7785
7786         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7787                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7788                         kzfree(connkeys);
7789                         return -EINVAL;
7790                 }
7791                 memcpy(&connect.vht_capa,
7792                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7793                        sizeof(connect.vht_capa));
7794         }
7795
7796         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7797                 if (!(rdev->wiphy.features &
7798                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7799                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7800                         return -EINVAL;
7801                 connect.flags |= ASSOC_REQ_USE_RRM;
7802         }
7803
7804         wdev_lock(dev->ieee80211_ptr);
7805         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7806         wdev_unlock(dev->ieee80211_ptr);
7807         if (err)
7808                 kzfree(connkeys);
7809         return err;
7810 }
7811
7812 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7813 {
7814         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7815         struct net_device *dev = info->user_ptr[1];
7816         u16 reason;
7817         int ret;
7818
7819         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7820                 reason = WLAN_REASON_DEAUTH_LEAVING;
7821         else
7822                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7823
7824         if (reason == 0)
7825                 return -EINVAL;
7826
7827         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7828             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7829                 return -EOPNOTSUPP;
7830
7831         wdev_lock(dev->ieee80211_ptr);
7832         ret = cfg80211_disconnect(rdev, dev, reason, true);
7833         wdev_unlock(dev->ieee80211_ptr);
7834         return ret;
7835 }
7836
7837 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7838 {
7839         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7840         struct net *net;
7841         int err;
7842
7843         if (info->attrs[NL80211_ATTR_PID]) {
7844                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7845
7846                 net = get_net_ns_by_pid(pid);
7847         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
7848                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
7849
7850                 net = get_net_ns_by_fd(fd);
7851         } else {
7852                 return -EINVAL;
7853         }
7854
7855         if (IS_ERR(net))
7856                 return PTR_ERR(net);
7857
7858         err = 0;
7859
7860         /* check if anything to do */
7861         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7862                 err = cfg80211_switch_netns(rdev, net);
7863
7864         put_net(net);
7865         return err;
7866 }
7867
7868 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7869 {
7870         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7871         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7872                         struct cfg80211_pmksa *pmksa) = NULL;
7873         struct net_device *dev = info->user_ptr[1];
7874         struct cfg80211_pmksa pmksa;
7875
7876         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7877
7878         if (!info->attrs[NL80211_ATTR_MAC])
7879                 return -EINVAL;
7880
7881         if (!info->attrs[NL80211_ATTR_PMKID])
7882                 return -EINVAL;
7883
7884         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7885         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7886
7887         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7888             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7889                 return -EOPNOTSUPP;
7890
7891         switch (info->genlhdr->cmd) {
7892         case NL80211_CMD_SET_PMKSA:
7893                 rdev_ops = rdev->ops->set_pmksa;
7894                 break;
7895         case NL80211_CMD_DEL_PMKSA:
7896                 rdev_ops = rdev->ops->del_pmksa;
7897                 break;
7898         default:
7899                 WARN_ON(1);
7900                 break;
7901         }
7902
7903         if (!rdev_ops)
7904                 return -EOPNOTSUPP;
7905
7906         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7907 }
7908
7909 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7910 {
7911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7912         struct net_device *dev = info->user_ptr[1];
7913
7914         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7915             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7916                 return -EOPNOTSUPP;
7917
7918         if (!rdev->ops->flush_pmksa)
7919                 return -EOPNOTSUPP;
7920
7921         return rdev_flush_pmksa(rdev, dev);
7922 }
7923
7924 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7925 {
7926         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7927         struct net_device *dev = info->user_ptr[1];
7928         u8 action_code, dialog_token;
7929         u32 peer_capability = 0;
7930         u16 status_code;
7931         u8 *peer;
7932         bool initiator;
7933
7934         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7935             !rdev->ops->tdls_mgmt)
7936                 return -EOPNOTSUPP;
7937
7938         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7939             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7940             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7941             !info->attrs[NL80211_ATTR_IE] ||
7942             !info->attrs[NL80211_ATTR_MAC])
7943                 return -EINVAL;
7944
7945         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7946         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7947         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7948         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7949         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
7950         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
7951                 peer_capability =
7952                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
7953
7954         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7955                               dialog_token, status_code, peer_capability,
7956                               initiator,
7957                               nla_data(info->attrs[NL80211_ATTR_IE]),
7958                               nla_len(info->attrs[NL80211_ATTR_IE]));
7959 }
7960
7961 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7962 {
7963         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7964         struct net_device *dev = info->user_ptr[1];
7965         enum nl80211_tdls_operation operation;
7966         u8 *peer;
7967
7968         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7969             !rdev->ops->tdls_oper)
7970                 return -EOPNOTSUPP;
7971
7972         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7973             !info->attrs[NL80211_ATTR_MAC])
7974                 return -EINVAL;
7975
7976         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7977         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7978
7979         return rdev_tdls_oper(rdev, dev, peer, operation);
7980 }
7981
7982 static int nl80211_remain_on_channel(struct sk_buff *skb,
7983                                      struct genl_info *info)
7984 {
7985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7986         struct wireless_dev *wdev = info->user_ptr[1];
7987         struct cfg80211_chan_def chandef;
7988         struct sk_buff *msg;
7989         void *hdr;
7990         u64 cookie;
7991         u32 duration;
7992         int err;
7993
7994         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7995             !info->attrs[NL80211_ATTR_DURATION])
7996                 return -EINVAL;
7997
7998         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7999
8000         if (!rdev->ops->remain_on_channel ||
8001             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8002                 return -EOPNOTSUPP;
8003
8004         /*
8005          * We should be on that channel for at least a minimum amount of
8006          * time (10ms) but no longer than the driver supports.
8007          */
8008         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8009             duration > rdev->wiphy.max_remain_on_channel_duration)
8010                 return -EINVAL;
8011
8012         err = nl80211_parse_chandef(rdev, info, &chandef);
8013         if (err)
8014                 return err;
8015
8016         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8017         if (!msg)
8018                 return -ENOMEM;
8019
8020         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8021                              NL80211_CMD_REMAIN_ON_CHANNEL);
8022         if (!hdr) {
8023                 err = -ENOBUFS;
8024                 goto free_msg;
8025         }
8026
8027         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8028                                      duration, &cookie);
8029
8030         if (err)
8031                 goto free_msg;
8032
8033         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8034                 goto nla_put_failure;
8035
8036         genlmsg_end(msg, hdr);
8037
8038         return genlmsg_reply(msg, info);
8039
8040  nla_put_failure:
8041         err = -ENOBUFS;
8042  free_msg:
8043         nlmsg_free(msg);
8044         return err;
8045 }
8046
8047 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8048                                             struct genl_info *info)
8049 {
8050         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8051         struct wireless_dev *wdev = info->user_ptr[1];
8052         u64 cookie;
8053
8054         if (!info->attrs[NL80211_ATTR_COOKIE])
8055                 return -EINVAL;
8056
8057         if (!rdev->ops->cancel_remain_on_channel)
8058                 return -EOPNOTSUPP;
8059
8060         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8061
8062         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8063 }
8064
8065 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8066                            u8 *rates, u8 rates_len)
8067 {
8068         u8 i;
8069         u32 mask = 0;
8070
8071         for (i = 0; i < rates_len; i++) {
8072                 int rate = (rates[i] & 0x7f) * 5;
8073                 int ridx;
8074                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8075                         struct ieee80211_rate *srate =
8076                                 &sband->bitrates[ridx];
8077                         if (rate == srate->bitrate) {
8078                                 mask |= 1 << ridx;
8079                                 break;
8080                         }
8081                 }
8082                 if (ridx == sband->n_bitrates)
8083                         return 0; /* rate not found */
8084         }
8085
8086         return mask;
8087 }
8088
8089 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8090                                u8 *rates, u8 rates_len,
8091                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8092 {
8093         u8 i;
8094
8095         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8096
8097         for (i = 0; i < rates_len; i++) {
8098                 int ridx, rbit;
8099
8100                 ridx = rates[i] / 8;
8101                 rbit = BIT(rates[i] % 8);
8102
8103                 /* check validity */
8104                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8105                         return false;
8106
8107                 /* check availability */
8108                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8109                         mcs[ridx] |= rbit;
8110                 else
8111                         return false;
8112         }
8113
8114         return true;
8115 }
8116
8117 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8118 {
8119         u16 mcs_mask = 0;
8120
8121         switch (vht_mcs_map) {
8122         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8123                 break;
8124         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8125                 mcs_mask = 0x00FF;
8126                 break;
8127         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8128                 mcs_mask = 0x01FF;
8129                 break;
8130         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8131                 mcs_mask = 0x03FF;
8132                 break;
8133         default:
8134                 break;
8135         }
8136
8137         return mcs_mask;
8138 }
8139
8140 static void vht_build_mcs_mask(u16 vht_mcs_map,
8141                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8142 {
8143         u8 nss;
8144
8145         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8146                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8147                 vht_mcs_map >>= 2;
8148         }
8149 }
8150
8151 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8152                              struct nl80211_txrate_vht *txrate,
8153                              u16 mcs[NL80211_VHT_NSS_MAX])
8154 {
8155         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8156         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8157         u8 i;
8158
8159         if (!sband->vht_cap.vht_supported)
8160                 return false;
8161
8162         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8163
8164         /* Build vht_mcs_mask from VHT capabilities */
8165         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8166
8167         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8168                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8169                         mcs[i] = txrate->mcs[i];
8170                 else
8171                         return false;
8172         }
8173
8174         return true;
8175 }
8176
8177 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8178         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8179                                     .len = NL80211_MAX_SUPP_RATES },
8180         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8181                                 .len = NL80211_MAX_SUPP_HT_RATES },
8182         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8183         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8184 };
8185
8186 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8187                                        struct genl_info *info)
8188 {
8189         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8191         struct cfg80211_bitrate_mask mask;
8192         int rem, i;
8193         struct net_device *dev = info->user_ptr[1];
8194         struct nlattr *tx_rates;
8195         struct ieee80211_supported_band *sband;
8196         u16 vht_tx_mcs_map;
8197
8198         if (!rdev->ops->set_bitrate_mask)
8199                 return -EOPNOTSUPP;
8200
8201         memset(&mask, 0, sizeof(mask));
8202         /* Default to all rates enabled */
8203         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
8204                 sband = rdev->wiphy.bands[i];
8205
8206                 if (!sband)
8207                         continue;
8208
8209                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8210                 memcpy(mask.control[i].ht_mcs,
8211                        sband->ht_cap.mcs.rx_mask,
8212                        sizeof(mask.control[i].ht_mcs));
8213
8214                 if (!sband->vht_cap.vht_supported)
8215                         continue;
8216
8217                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8218                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8219         }
8220
8221         /* if no rates are given set it back to the defaults */
8222         if (!info->attrs[NL80211_ATTR_TX_RATES])
8223                 goto out;
8224
8225         /*
8226          * The nested attribute uses enum nl80211_band as the index. This maps
8227          * directly to the enum ieee80211_band values used in cfg80211.
8228          */
8229         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8230         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8231                 enum ieee80211_band band = nla_type(tx_rates);
8232                 int err;
8233
8234                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
8235                         return -EINVAL;
8236                 sband = rdev->wiphy.bands[band];
8237                 if (sband == NULL)
8238                         return -EINVAL;
8239                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8240                                 nla_len(tx_rates), nl80211_txattr_policy);
8241                 if (err)
8242                         return err;
8243                 if (tb[NL80211_TXRATE_LEGACY]) {
8244                         mask.control[band].legacy = rateset_to_mask(
8245                                 sband,
8246                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8247                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8248                         if ((mask.control[band].legacy == 0) &&
8249                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8250                                 return -EINVAL;
8251                 }
8252                 if (tb[NL80211_TXRATE_HT]) {
8253                         if (!ht_rateset_to_mask(
8254                                         sband,
8255                                         nla_data(tb[NL80211_TXRATE_HT]),
8256                                         nla_len(tb[NL80211_TXRATE_HT]),
8257                                         mask.control[band].ht_mcs))
8258                                 return -EINVAL;
8259                 }
8260                 if (tb[NL80211_TXRATE_VHT]) {
8261                         if (!vht_set_mcs_mask(
8262                                         sband,
8263                                         nla_data(tb[NL80211_TXRATE_VHT]),
8264                                         mask.control[band].vht_mcs))
8265                                 return -EINVAL;
8266                 }
8267                 if (tb[NL80211_TXRATE_GI]) {
8268                         mask.control[band].gi =
8269                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8270                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8271                                 return -EINVAL;
8272                 }
8273
8274                 if (mask.control[band].legacy == 0) {
8275                         /* don't allow empty legacy rates if HT or VHT
8276                          * are not even supported.
8277                          */
8278                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8279                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8280                                 return -EINVAL;
8281
8282                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8283                                 if (mask.control[band].ht_mcs[i])
8284                                         goto out;
8285
8286                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8287                                 if (mask.control[band].vht_mcs[i])
8288                                         goto out;
8289
8290                         /* legacy and mcs rates may not be both empty */
8291                         return -EINVAL;
8292                 }
8293         }
8294
8295 out:
8296         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8297 }
8298
8299 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8300 {
8301         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8302         struct wireless_dev *wdev = info->user_ptr[1];
8303         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8304
8305         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8306                 return -EINVAL;
8307
8308         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8309                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8310
8311         switch (wdev->iftype) {
8312         case NL80211_IFTYPE_STATION:
8313         case NL80211_IFTYPE_ADHOC:
8314         case NL80211_IFTYPE_P2P_CLIENT:
8315         case NL80211_IFTYPE_AP:
8316         case NL80211_IFTYPE_AP_VLAN:
8317         case NL80211_IFTYPE_MESH_POINT:
8318         case NL80211_IFTYPE_P2P_GO:
8319         case NL80211_IFTYPE_P2P_DEVICE:
8320                 break;
8321         default:
8322                 return -EOPNOTSUPP;
8323         }
8324
8325         /* not much point in registering if we can't reply */
8326         if (!rdev->ops->mgmt_tx)
8327                 return -EOPNOTSUPP;
8328
8329         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8330                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8331                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8332 }
8333
8334 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8335 {
8336         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8337         struct wireless_dev *wdev = info->user_ptr[1];
8338         struct cfg80211_chan_def chandef;
8339         int err;
8340         void *hdr = NULL;
8341         u64 cookie;
8342         struct sk_buff *msg = NULL;
8343         struct cfg80211_mgmt_tx_params params = {
8344                 .dont_wait_for_ack =
8345                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8346         };
8347
8348         if (!info->attrs[NL80211_ATTR_FRAME])
8349                 return -EINVAL;
8350
8351         if (!rdev->ops->mgmt_tx)
8352                 return -EOPNOTSUPP;
8353
8354         switch (wdev->iftype) {
8355         case NL80211_IFTYPE_P2P_DEVICE:
8356                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8357                         return -EINVAL;
8358         case NL80211_IFTYPE_STATION:
8359         case NL80211_IFTYPE_ADHOC:
8360         case NL80211_IFTYPE_P2P_CLIENT:
8361         case NL80211_IFTYPE_AP:
8362         case NL80211_IFTYPE_AP_VLAN:
8363         case NL80211_IFTYPE_MESH_POINT:
8364         case NL80211_IFTYPE_P2P_GO:
8365                 break;
8366         default:
8367                 return -EOPNOTSUPP;
8368         }
8369
8370         if (info->attrs[NL80211_ATTR_DURATION]) {
8371                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8372                         return -EINVAL;
8373                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8374
8375                 /*
8376                  * We should wait on the channel for at least a minimum amount
8377                  * of time (10ms) but no longer than the driver supports.
8378                  */
8379                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8380                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8381                         return -EINVAL;
8382
8383         }
8384
8385         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8386
8387         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8388                 return -EINVAL;
8389
8390         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8391
8392         /* get the channel if any has been specified, otherwise pass NULL to
8393          * the driver. The latter will use the current one
8394          */
8395         chandef.chan = NULL;
8396         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8397                 err = nl80211_parse_chandef(rdev, info, &chandef);
8398                 if (err)
8399                         return err;
8400         }
8401
8402         if (!chandef.chan && params.offchan)
8403                 return -EINVAL;
8404
8405         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8406         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8407
8408         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8409                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8410                 int i;
8411
8412                 if (len % sizeof(u16))
8413                         return -EINVAL;
8414
8415                 params.n_csa_offsets = len / sizeof(u16);
8416                 params.csa_offsets =
8417                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8418
8419                 /* check that all the offsets fit the frame */
8420                 for (i = 0; i < params.n_csa_offsets; i++) {
8421                         if (params.csa_offsets[i] >= params.len)
8422                                 return -EINVAL;
8423                 }
8424         }
8425
8426         if (!params.dont_wait_for_ack) {
8427                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8428                 if (!msg)
8429                         return -ENOMEM;
8430
8431                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8432                                      NL80211_CMD_FRAME);
8433                 if (!hdr) {
8434                         err = -ENOBUFS;
8435                         goto free_msg;
8436                 }
8437         }
8438
8439         params.chan = chandef.chan;
8440         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8441         if (err)
8442                 goto free_msg;
8443
8444         if (msg) {
8445                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8446                         goto nla_put_failure;
8447
8448                 genlmsg_end(msg, hdr);
8449                 return genlmsg_reply(msg, info);
8450         }
8451
8452         return 0;
8453
8454  nla_put_failure:
8455         err = -ENOBUFS;
8456  free_msg:
8457         nlmsg_free(msg);
8458         return err;
8459 }
8460
8461 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8462 {
8463         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8464         struct wireless_dev *wdev = info->user_ptr[1];
8465         u64 cookie;
8466
8467         if (!info->attrs[NL80211_ATTR_COOKIE])
8468                 return -EINVAL;
8469
8470         if (!rdev->ops->mgmt_tx_cancel_wait)
8471                 return -EOPNOTSUPP;
8472
8473         switch (wdev->iftype) {
8474         case NL80211_IFTYPE_STATION:
8475         case NL80211_IFTYPE_ADHOC:
8476         case NL80211_IFTYPE_P2P_CLIENT:
8477         case NL80211_IFTYPE_AP:
8478         case NL80211_IFTYPE_AP_VLAN:
8479         case NL80211_IFTYPE_P2P_GO:
8480         case NL80211_IFTYPE_P2P_DEVICE:
8481                 break;
8482         default:
8483                 return -EOPNOTSUPP;
8484         }
8485
8486         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8487
8488         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8489 }
8490
8491 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8492 {
8493         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8494         struct wireless_dev *wdev;
8495         struct net_device *dev = info->user_ptr[1];
8496         u8 ps_state;
8497         bool state;
8498         int err;
8499
8500         if (!info->attrs[NL80211_ATTR_PS_STATE])
8501                 return -EINVAL;
8502
8503         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8504
8505         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8506                 return -EINVAL;
8507
8508         wdev = dev->ieee80211_ptr;
8509
8510         if (!rdev->ops->set_power_mgmt)
8511                 return -EOPNOTSUPP;
8512
8513         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8514
8515         if (state == wdev->ps)
8516                 return 0;
8517
8518         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8519         if (!err)
8520                 wdev->ps = state;
8521         return err;
8522 }
8523
8524 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8525 {
8526         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8527         enum nl80211_ps_state ps_state;
8528         struct wireless_dev *wdev;
8529         struct net_device *dev = info->user_ptr[1];
8530         struct sk_buff *msg;
8531         void *hdr;
8532         int err;
8533
8534         wdev = dev->ieee80211_ptr;
8535
8536         if (!rdev->ops->set_power_mgmt)
8537                 return -EOPNOTSUPP;
8538
8539         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8540         if (!msg)
8541                 return -ENOMEM;
8542
8543         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8544                              NL80211_CMD_GET_POWER_SAVE);
8545         if (!hdr) {
8546                 err = -ENOBUFS;
8547                 goto free_msg;
8548         }
8549
8550         if (wdev->ps)
8551                 ps_state = NL80211_PS_ENABLED;
8552         else
8553                 ps_state = NL80211_PS_DISABLED;
8554
8555         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8556                 goto nla_put_failure;
8557
8558         genlmsg_end(msg, hdr);
8559         return genlmsg_reply(msg, info);
8560
8561  nla_put_failure:
8562         err = -ENOBUFS;
8563  free_msg:
8564         nlmsg_free(msg);
8565         return err;
8566 }
8567
8568 static const struct nla_policy
8569 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8570         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8571         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8572         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8573         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8574         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8575         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8576 };
8577
8578 static int nl80211_set_cqm_txe(struct genl_info *info,
8579                                u32 rate, u32 pkts, u32 intvl)
8580 {
8581         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8582         struct net_device *dev = info->user_ptr[1];
8583         struct wireless_dev *wdev = dev->ieee80211_ptr;
8584
8585         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8586                 return -EINVAL;
8587
8588         if (!rdev->ops->set_cqm_txe_config)
8589                 return -EOPNOTSUPP;
8590
8591         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8592             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8593                 return -EOPNOTSUPP;
8594
8595         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8596 }
8597
8598 static int nl80211_set_cqm_rssi(struct genl_info *info,
8599                                 s32 threshold, u32 hysteresis)
8600 {
8601         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8602         struct net_device *dev = info->user_ptr[1];
8603         struct wireless_dev *wdev = dev->ieee80211_ptr;
8604
8605         if (threshold > 0)
8606                 return -EINVAL;
8607
8608         /* disabling - hysteresis should also be zero then */
8609         if (threshold == 0)
8610                 hysteresis = 0;
8611
8612         if (!rdev->ops->set_cqm_rssi_config)
8613                 return -EOPNOTSUPP;
8614
8615         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8616             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8617                 return -EOPNOTSUPP;
8618
8619         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8620 }
8621
8622 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8623 {
8624         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8625         struct nlattr *cqm;
8626         int err;
8627
8628         cqm = info->attrs[NL80211_ATTR_CQM];
8629         if (!cqm)
8630                 return -EINVAL;
8631
8632         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8633                                nl80211_attr_cqm_policy);
8634         if (err)
8635                 return err;
8636
8637         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8638             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8639                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8640                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8641
8642                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8643         }
8644
8645         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8646             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8647             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8648                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8649                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8650                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8651
8652                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8653         }
8654
8655         return -EINVAL;
8656 }
8657
8658 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8659 {
8660         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8661         struct net_device *dev = info->user_ptr[1];
8662         struct ocb_setup setup = {};
8663         int err;
8664
8665         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8666         if (err)
8667                 return err;
8668
8669         return cfg80211_join_ocb(rdev, dev, &setup);
8670 }
8671
8672 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8673 {
8674         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8675         struct net_device *dev = info->user_ptr[1];
8676
8677         return cfg80211_leave_ocb(rdev, dev);
8678 }
8679
8680 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8681 {
8682         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8683         struct net_device *dev = info->user_ptr[1];
8684         struct mesh_config cfg;
8685         struct mesh_setup setup;
8686         int err;
8687
8688         /* start with default */
8689         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8690         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8691
8692         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8693                 /* and parse parameters if given */
8694                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8695                 if (err)
8696                         return err;
8697         }
8698
8699         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8700             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8701                 return -EINVAL;
8702
8703         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8704         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8705
8706         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8707             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8708                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8709                         return -EINVAL;
8710
8711         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8712                 setup.beacon_interval =
8713                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8714                 if (setup.beacon_interval < 10 ||
8715                     setup.beacon_interval > 10000)
8716                         return -EINVAL;
8717         }
8718
8719         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8720                 setup.dtim_period =
8721                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8722                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8723                         return -EINVAL;
8724         }
8725
8726         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8727                 /* parse additional setup parameters if given */
8728                 err = nl80211_parse_mesh_setup(info, &setup);
8729                 if (err)
8730                         return err;
8731         }
8732
8733         if (setup.user_mpm)
8734                 cfg.auto_open_plinks = false;
8735
8736         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8737                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8738                 if (err)
8739                         return err;
8740         } else {
8741                 /* cfg80211_join_mesh() will sort it out */
8742                 setup.chandef.chan = NULL;
8743         }
8744
8745         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8746                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8747                 int n_rates =
8748                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8749                 struct ieee80211_supported_band *sband;
8750
8751                 if (!setup.chandef.chan)
8752                         return -EINVAL;
8753
8754                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8755
8756                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8757                                              &setup.basic_rates);
8758                 if (err)
8759                         return err;
8760         }
8761
8762         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8763 }
8764
8765 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8766 {
8767         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8768         struct net_device *dev = info->user_ptr[1];
8769
8770         return cfg80211_leave_mesh(rdev, dev);
8771 }
8772
8773 #ifdef CONFIG_PM
8774 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8775                                         struct cfg80211_registered_device *rdev)
8776 {
8777         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8778         struct nlattr *nl_pats, *nl_pat;
8779         int i, pat_len;
8780
8781         if (!wowlan->n_patterns)
8782                 return 0;
8783
8784         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8785         if (!nl_pats)
8786                 return -ENOBUFS;
8787
8788         for (i = 0; i < wowlan->n_patterns; i++) {
8789                 nl_pat = nla_nest_start(msg, i + 1);
8790                 if (!nl_pat)
8791                         return -ENOBUFS;
8792                 pat_len = wowlan->patterns[i].pattern_len;
8793                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8794                             wowlan->patterns[i].mask) ||
8795                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8796                             wowlan->patterns[i].pattern) ||
8797                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8798                                 wowlan->patterns[i].pkt_offset))
8799                         return -ENOBUFS;
8800                 nla_nest_end(msg, nl_pat);
8801         }
8802         nla_nest_end(msg, nl_pats);
8803
8804         return 0;
8805 }
8806
8807 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8808                                    struct cfg80211_wowlan_tcp *tcp)
8809 {
8810         struct nlattr *nl_tcp;
8811
8812         if (!tcp)
8813                 return 0;
8814
8815         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8816         if (!nl_tcp)
8817                 return -ENOBUFS;
8818
8819         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8820             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8821             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8822             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8823             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8824             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8825                     tcp->payload_len, tcp->payload) ||
8826             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8827                         tcp->data_interval) ||
8828             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8829                     tcp->wake_len, tcp->wake_data) ||
8830             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8831                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8832                 return -ENOBUFS;
8833
8834         if (tcp->payload_seq.len &&
8835             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8836                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8837                 return -ENOBUFS;
8838
8839         if (tcp->payload_tok.len &&
8840             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8841                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8842                     &tcp->payload_tok))
8843                 return -ENOBUFS;
8844
8845         nla_nest_end(msg, nl_tcp);
8846
8847         return 0;
8848 }
8849
8850 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
8851                                   struct cfg80211_sched_scan_request *req)
8852 {
8853         struct nlattr *nd, *freqs, *matches, *match;
8854         int i;
8855
8856         if (!req)
8857                 return 0;
8858
8859         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
8860         if (!nd)
8861                 return -ENOBUFS;
8862
8863         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL, req->interval))
8864                 return -ENOBUFS;
8865
8866         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
8867                 return -ENOBUFS;
8868
8869         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8870         if (!freqs)
8871                 return -ENOBUFS;
8872
8873         for (i = 0; i < req->n_channels; i++)
8874                 nla_put_u32(msg, i, req->channels[i]->center_freq);
8875
8876         nla_nest_end(msg, freqs);
8877
8878         if (req->n_match_sets) {
8879                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
8880                 for (i = 0; i < req->n_match_sets; i++) {
8881                         match = nla_nest_start(msg, i);
8882                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
8883                                 req->match_sets[i].ssid.ssid_len,
8884                                 req->match_sets[i].ssid.ssid);
8885                         nla_nest_end(msg, match);
8886                 }
8887                 nla_nest_end(msg, matches);
8888         }
8889
8890         nla_nest_end(msg, nd);
8891
8892         return 0;
8893 }
8894
8895 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
8896 {
8897         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8898         struct sk_buff *msg;
8899         void *hdr;
8900         u32 size = NLMSG_DEFAULT_SIZE;
8901
8902         if (!rdev->wiphy.wowlan)
8903                 return -EOPNOTSUPP;
8904
8905         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
8906                 /* adjust size to have room for all the data */
8907                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
8908                         rdev->wiphy.wowlan_config->tcp->payload_len +
8909                         rdev->wiphy.wowlan_config->tcp->wake_len +
8910                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
8911         }
8912
8913         msg = nlmsg_new(size, GFP_KERNEL);
8914         if (!msg)
8915                 return -ENOMEM;
8916
8917         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8918                              NL80211_CMD_GET_WOWLAN);
8919         if (!hdr)
8920                 goto nla_put_failure;
8921
8922         if (rdev->wiphy.wowlan_config) {
8923                 struct nlattr *nl_wowlan;
8924
8925                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
8926                 if (!nl_wowlan)
8927                         goto nla_put_failure;
8928
8929                 if ((rdev->wiphy.wowlan_config->any &&
8930                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
8931                     (rdev->wiphy.wowlan_config->disconnect &&
8932                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
8933                     (rdev->wiphy.wowlan_config->magic_pkt &&
8934                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
8935                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
8936                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
8937                     (rdev->wiphy.wowlan_config->eap_identity_req &&
8938                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
8939                     (rdev->wiphy.wowlan_config->four_way_handshake &&
8940                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
8941                     (rdev->wiphy.wowlan_config->rfkill_release &&
8942                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
8943                         goto nla_put_failure;
8944
8945                 if (nl80211_send_wowlan_patterns(msg, rdev))
8946                         goto nla_put_failure;
8947
8948                 if (nl80211_send_wowlan_tcp(msg,
8949                                             rdev->wiphy.wowlan_config->tcp))
8950                         goto nla_put_failure;
8951
8952                 if (nl80211_send_wowlan_nd(
8953                             msg,
8954                             rdev->wiphy.wowlan_config->nd_config))
8955                         goto nla_put_failure;
8956
8957                 nla_nest_end(msg, nl_wowlan);
8958         }
8959
8960         genlmsg_end(msg, hdr);
8961         return genlmsg_reply(msg, info);
8962
8963 nla_put_failure:
8964         nlmsg_free(msg);
8965         return -ENOBUFS;
8966 }
8967
8968 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8969                                     struct nlattr *attr,
8970                                     struct cfg80211_wowlan *trig)
8971 {
8972         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8973         struct cfg80211_wowlan_tcp *cfg;
8974         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8975         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8976         u32 size;
8977         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8978         int err, port;
8979
8980         if (!rdev->wiphy.wowlan->tcp)
8981                 return -EINVAL;
8982
8983         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8984                         nla_data(attr), nla_len(attr),
8985                         nl80211_wowlan_tcp_policy);
8986         if (err)
8987                 return err;
8988
8989         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8990             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8991             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8992             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8993             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8994             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8995             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8996             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8997                 return -EINVAL;
8998
8999         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9000         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9001                 return -EINVAL;
9002
9003         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9004                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9005             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9006                 return -EINVAL;
9007
9008         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9009         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9010                 return -EINVAL;
9011
9012         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9013         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9014                 return -EINVAL;
9015
9016         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9017                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9018
9019                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9020                 tokens_size = tokln - sizeof(*tok);
9021
9022                 if (!tok->len || tokens_size % tok->len)
9023                         return -EINVAL;
9024                 if (!rdev->wiphy.wowlan->tcp->tok)
9025                         return -EINVAL;
9026                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9027                         return -EINVAL;
9028                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9029                         return -EINVAL;
9030                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9031                         return -EINVAL;
9032                 if (tok->offset + tok->len > data_size)
9033                         return -EINVAL;
9034         }
9035
9036         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9037                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9038                 if (!rdev->wiphy.wowlan->tcp->seq)
9039                         return -EINVAL;
9040                 if (seq->len == 0 || seq->len > 4)
9041                         return -EINVAL;
9042                 if (seq->len + seq->offset > data_size)
9043                         return -EINVAL;
9044         }
9045
9046         size = sizeof(*cfg);
9047         size += data_size;
9048         size += wake_size + wake_mask_size;
9049         size += tokens_size;
9050
9051         cfg = kzalloc(size, GFP_KERNEL);
9052         if (!cfg)
9053                 return -ENOMEM;
9054         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9055         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9056         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9057                ETH_ALEN);
9058         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9059                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9060         else
9061                 port = 0;
9062 #ifdef CONFIG_INET
9063         /* allocate a socket and port for it and use it */
9064         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9065                             IPPROTO_TCP, &cfg->sock, 1);
9066         if (err) {
9067                 kfree(cfg);
9068                 return err;
9069         }
9070         if (inet_csk_get_port(cfg->sock->sk, port)) {
9071                 sock_release(cfg->sock);
9072                 kfree(cfg);
9073                 return -EADDRINUSE;
9074         }
9075         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9076 #else
9077         if (!port) {
9078                 kfree(cfg);
9079                 return -EINVAL;
9080         }
9081         cfg->src_port = port;
9082 #endif
9083
9084         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9085         cfg->payload_len = data_size;
9086         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9087         memcpy((void *)cfg->payload,
9088                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9089                data_size);
9090         if (seq)
9091                 cfg->payload_seq = *seq;
9092         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9093         cfg->wake_len = wake_size;
9094         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9095         memcpy((void *)cfg->wake_data,
9096                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9097                wake_size);
9098         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9099                          data_size + wake_size;
9100         memcpy((void *)cfg->wake_mask,
9101                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9102                wake_mask_size);
9103         if (tok) {
9104                 cfg->tokens_size = tokens_size;
9105                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9106         }
9107
9108         trig->tcp = cfg;
9109
9110         return 0;
9111 }
9112
9113 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9114                                    const struct wiphy_wowlan_support *wowlan,
9115                                    struct nlattr *attr,
9116                                    struct cfg80211_wowlan *trig)
9117 {
9118         struct nlattr **tb;
9119         int err;
9120
9121         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9122         if (!tb)
9123                 return -ENOMEM;
9124
9125         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9126                 err = -EOPNOTSUPP;
9127                 goto out;
9128         }
9129
9130         err = nla_parse(tb, NL80211_ATTR_MAX,
9131                         nla_data(attr), nla_len(attr),
9132                         nl80211_policy);
9133         if (err)
9134                 goto out;
9135
9136         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9137         err = PTR_ERR_OR_ZERO(trig->nd_config);
9138         if (err)
9139                 trig->nd_config = NULL;
9140
9141 out:
9142         kfree(tb);
9143         return err;
9144 }
9145
9146 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9147 {
9148         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9149         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9150         struct cfg80211_wowlan new_triggers = {};
9151         struct cfg80211_wowlan *ntrig;
9152         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9153         int err, i;
9154         bool prev_enabled = rdev->wiphy.wowlan_config;
9155         bool regular = false;
9156
9157         if (!wowlan)
9158                 return -EOPNOTSUPP;
9159
9160         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9161                 cfg80211_rdev_free_wowlan(rdev);
9162                 rdev->wiphy.wowlan_config = NULL;
9163                 goto set_wakeup;
9164         }
9165
9166         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9167                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9168                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9169                         nl80211_wowlan_policy);
9170         if (err)
9171                 return err;
9172
9173         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9174                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9175                         return -EINVAL;
9176                 new_triggers.any = true;
9177         }
9178
9179         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9180                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9181                         return -EINVAL;
9182                 new_triggers.disconnect = true;
9183                 regular = true;
9184         }
9185
9186         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9187                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9188                         return -EINVAL;
9189                 new_triggers.magic_pkt = true;
9190                 regular = true;
9191         }
9192
9193         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9194                 return -EINVAL;
9195
9196         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9197                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9198                         return -EINVAL;
9199                 new_triggers.gtk_rekey_failure = true;
9200                 regular = true;
9201         }
9202
9203         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9204                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9205                         return -EINVAL;
9206                 new_triggers.eap_identity_req = true;
9207                 regular = true;
9208         }
9209
9210         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9211                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9212                         return -EINVAL;
9213                 new_triggers.four_way_handshake = true;
9214                 regular = true;
9215         }
9216
9217         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9218                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9219                         return -EINVAL;
9220                 new_triggers.rfkill_release = true;
9221                 regular = true;
9222         }
9223
9224         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9225                 struct nlattr *pat;
9226                 int n_patterns = 0;
9227                 int rem, pat_len, mask_len, pkt_offset;
9228                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9229
9230                 regular = true;
9231
9232                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9233                                     rem)
9234                         n_patterns++;
9235                 if (n_patterns > wowlan->n_patterns)
9236                         return -EINVAL;
9237
9238                 new_triggers.patterns = kcalloc(n_patterns,
9239                                                 sizeof(new_triggers.patterns[0]),
9240                                                 GFP_KERNEL);
9241                 if (!new_triggers.patterns)
9242                         return -ENOMEM;
9243
9244                 new_triggers.n_patterns = n_patterns;
9245                 i = 0;
9246
9247                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9248                                     rem) {
9249                         u8 *mask_pat;
9250
9251                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9252                                   nla_len(pat), NULL);
9253                         err = -EINVAL;
9254                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9255                             !pat_tb[NL80211_PKTPAT_PATTERN])
9256                                 goto error;
9257                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9258                         mask_len = DIV_ROUND_UP(pat_len, 8);
9259                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9260                                 goto error;
9261                         if (pat_len > wowlan->pattern_max_len ||
9262                             pat_len < wowlan->pattern_min_len)
9263                                 goto error;
9264
9265                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9266                                 pkt_offset = 0;
9267                         else
9268                                 pkt_offset = nla_get_u32(
9269                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9270                         if (pkt_offset > wowlan->max_pkt_offset)
9271                                 goto error;
9272                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9273
9274                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9275                         if (!mask_pat) {
9276                                 err = -ENOMEM;
9277                                 goto error;
9278                         }
9279                         new_triggers.patterns[i].mask = mask_pat;
9280                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9281                                mask_len);
9282                         mask_pat += mask_len;
9283                         new_triggers.patterns[i].pattern = mask_pat;
9284                         new_triggers.patterns[i].pattern_len = pat_len;
9285                         memcpy(mask_pat,
9286                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9287                                pat_len);
9288                         i++;
9289                 }
9290         }
9291
9292         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9293                 regular = true;
9294                 err = nl80211_parse_wowlan_tcp(
9295                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9296                         &new_triggers);
9297                 if (err)
9298                         goto error;
9299         }
9300
9301         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9302                 regular = true;
9303                 err = nl80211_parse_wowlan_nd(
9304                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9305                         &new_triggers);
9306                 if (err)
9307                         goto error;
9308         }
9309
9310         /* The 'any' trigger means the device continues operating more or less
9311          * as in its normal operation mode and wakes up the host on most of the
9312          * normal interrupts (like packet RX, ...)
9313          * It therefore makes little sense to combine with the more constrained
9314          * wakeup trigger modes.
9315          */
9316         if (new_triggers.any && regular) {
9317                 err = -EINVAL;
9318                 goto error;
9319         }
9320
9321         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9322         if (!ntrig) {
9323                 err = -ENOMEM;
9324                 goto error;
9325         }
9326         cfg80211_rdev_free_wowlan(rdev);
9327         rdev->wiphy.wowlan_config = ntrig;
9328
9329  set_wakeup:
9330         if (rdev->ops->set_wakeup &&
9331             prev_enabled != !!rdev->wiphy.wowlan_config)
9332                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9333
9334         return 0;
9335  error:
9336         for (i = 0; i < new_triggers.n_patterns; i++)
9337                 kfree(new_triggers.patterns[i].mask);
9338         kfree(new_triggers.patterns);
9339         if (new_triggers.tcp && new_triggers.tcp->sock)
9340                 sock_release(new_triggers.tcp->sock);
9341         kfree(new_triggers.tcp);
9342         return err;
9343 }
9344 #endif
9345
9346 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9347                                        struct cfg80211_registered_device *rdev)
9348 {
9349         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9350         int i, j, pat_len;
9351         struct cfg80211_coalesce_rules *rule;
9352
9353         if (!rdev->coalesce->n_rules)
9354                 return 0;
9355
9356         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9357         if (!nl_rules)
9358                 return -ENOBUFS;
9359
9360         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9361                 nl_rule = nla_nest_start(msg, i + 1);
9362                 if (!nl_rule)
9363                         return -ENOBUFS;
9364
9365                 rule = &rdev->coalesce->rules[i];
9366                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9367                                 rule->delay))
9368                         return -ENOBUFS;
9369
9370                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9371                                 rule->condition))
9372                         return -ENOBUFS;
9373
9374                 nl_pats = nla_nest_start(msg,
9375                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9376                 if (!nl_pats)
9377                         return -ENOBUFS;
9378
9379                 for (j = 0; j < rule->n_patterns; j++) {
9380                         nl_pat = nla_nest_start(msg, j + 1);
9381                         if (!nl_pat)
9382                                 return -ENOBUFS;
9383                         pat_len = rule->patterns[j].pattern_len;
9384                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9385                                     DIV_ROUND_UP(pat_len, 8),
9386                                     rule->patterns[j].mask) ||
9387                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9388                                     rule->patterns[j].pattern) ||
9389                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9390                                         rule->patterns[j].pkt_offset))
9391                                 return -ENOBUFS;
9392                         nla_nest_end(msg, nl_pat);
9393                 }
9394                 nla_nest_end(msg, nl_pats);
9395                 nla_nest_end(msg, nl_rule);
9396         }
9397         nla_nest_end(msg, nl_rules);
9398
9399         return 0;
9400 }
9401
9402 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9403 {
9404         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9405         struct sk_buff *msg;
9406         void *hdr;
9407
9408         if (!rdev->wiphy.coalesce)
9409                 return -EOPNOTSUPP;
9410
9411         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9412         if (!msg)
9413                 return -ENOMEM;
9414
9415         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9416                              NL80211_CMD_GET_COALESCE);
9417         if (!hdr)
9418                 goto nla_put_failure;
9419
9420         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9421                 goto nla_put_failure;
9422
9423         genlmsg_end(msg, hdr);
9424         return genlmsg_reply(msg, info);
9425
9426 nla_put_failure:
9427         nlmsg_free(msg);
9428         return -ENOBUFS;
9429 }
9430
9431 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9432 {
9433         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9434         int i, j;
9435         struct cfg80211_coalesce_rules *rule;
9436
9437         if (!coalesce)
9438                 return;
9439
9440         for (i = 0; i < coalesce->n_rules; i++) {
9441                 rule = &coalesce->rules[i];
9442                 for (j = 0; j < rule->n_patterns; j++)
9443                         kfree(rule->patterns[j].mask);
9444                 kfree(rule->patterns);
9445         }
9446         kfree(coalesce->rules);
9447         kfree(coalesce);
9448         rdev->coalesce = NULL;
9449 }
9450
9451 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9452                                        struct nlattr *rule,
9453                                        struct cfg80211_coalesce_rules *new_rule)
9454 {
9455         int err, i;
9456         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9457         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9458         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9459         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9460
9461         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9462                         nla_len(rule), nl80211_coalesce_policy);
9463         if (err)
9464                 return err;
9465
9466         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9467                 new_rule->delay =
9468                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9469         if (new_rule->delay > coalesce->max_delay)
9470                 return -EINVAL;
9471
9472         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9473                 new_rule->condition =
9474                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9475         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9476             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9477                 return -EINVAL;
9478
9479         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9480                 return -EINVAL;
9481
9482         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9483                             rem)
9484                 n_patterns++;
9485         if (n_patterns > coalesce->n_patterns)
9486                 return -EINVAL;
9487
9488         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9489                                      GFP_KERNEL);
9490         if (!new_rule->patterns)
9491                 return -ENOMEM;
9492
9493         new_rule->n_patterns = n_patterns;
9494         i = 0;
9495
9496         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9497                             rem) {
9498                 u8 *mask_pat;
9499
9500                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9501                           nla_len(pat), NULL);
9502                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9503                     !pat_tb[NL80211_PKTPAT_PATTERN])
9504                         return -EINVAL;
9505                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9506                 mask_len = DIV_ROUND_UP(pat_len, 8);
9507                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9508                         return -EINVAL;
9509                 if (pat_len > coalesce->pattern_max_len ||
9510                     pat_len < coalesce->pattern_min_len)
9511                         return -EINVAL;
9512
9513                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9514                         pkt_offset = 0;
9515                 else
9516                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9517                 if (pkt_offset > coalesce->max_pkt_offset)
9518                         return -EINVAL;
9519                 new_rule->patterns[i].pkt_offset = pkt_offset;
9520
9521                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9522                 if (!mask_pat)
9523                         return -ENOMEM;
9524
9525                 new_rule->patterns[i].mask = mask_pat;
9526                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9527                        mask_len);
9528
9529                 mask_pat += mask_len;
9530                 new_rule->patterns[i].pattern = mask_pat;
9531                 new_rule->patterns[i].pattern_len = pat_len;
9532                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9533                        pat_len);
9534                 i++;
9535         }
9536
9537         return 0;
9538 }
9539
9540 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9541 {
9542         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9543         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9544         struct cfg80211_coalesce new_coalesce = {};
9545         struct cfg80211_coalesce *n_coalesce;
9546         int err, rem_rule, n_rules = 0, i, j;
9547         struct nlattr *rule;
9548         struct cfg80211_coalesce_rules *tmp_rule;
9549
9550         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9551                 return -EOPNOTSUPP;
9552
9553         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9554                 cfg80211_rdev_free_coalesce(rdev);
9555                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
9556                 return 0;
9557         }
9558
9559         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9560                             rem_rule)
9561                 n_rules++;
9562         if (n_rules > coalesce->n_rules)
9563                 return -EINVAL;
9564
9565         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9566                                      GFP_KERNEL);
9567         if (!new_coalesce.rules)
9568                 return -ENOMEM;
9569
9570         new_coalesce.n_rules = n_rules;
9571         i = 0;
9572
9573         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9574                             rem_rule) {
9575                 err = nl80211_parse_coalesce_rule(rdev, rule,
9576                                                   &new_coalesce.rules[i]);
9577                 if (err)
9578                         goto error;
9579
9580                 i++;
9581         }
9582
9583         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
9584         if (err)
9585                 goto error;
9586
9587         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9588         if (!n_coalesce) {
9589                 err = -ENOMEM;
9590                 goto error;
9591         }
9592         cfg80211_rdev_free_coalesce(rdev);
9593         rdev->coalesce = n_coalesce;
9594
9595         return 0;
9596 error:
9597         for (i = 0; i < new_coalesce.n_rules; i++) {
9598                 tmp_rule = &new_coalesce.rules[i];
9599                 for (j = 0; j < tmp_rule->n_patterns; j++)
9600                         kfree(tmp_rule->patterns[j].mask);
9601                 kfree(tmp_rule->patterns);
9602         }
9603         kfree(new_coalesce.rules);
9604
9605         return err;
9606 }
9607
9608 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9609 {
9610         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9611         struct net_device *dev = info->user_ptr[1];
9612         struct wireless_dev *wdev = dev->ieee80211_ptr;
9613         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9614         struct cfg80211_gtk_rekey_data rekey_data;
9615         int err;
9616
9617         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9618                 return -EINVAL;
9619
9620         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9621                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9622                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9623                         nl80211_rekey_policy);
9624         if (err)
9625                 return err;
9626
9627         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9628                 return -ERANGE;
9629         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9630                 return -ERANGE;
9631         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9632                 return -ERANGE;
9633
9634         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9635         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9636         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9637
9638         wdev_lock(wdev);
9639         if (!wdev->current_bss) {
9640                 err = -ENOTCONN;
9641                 goto out;
9642         }
9643
9644         if (!rdev->ops->set_rekey_data) {
9645                 err = -EOPNOTSUPP;
9646                 goto out;
9647         }
9648
9649         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9650  out:
9651         wdev_unlock(wdev);
9652         return err;
9653 }
9654
9655 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9656                                              struct genl_info *info)
9657 {
9658         struct net_device *dev = info->user_ptr[1];
9659         struct wireless_dev *wdev = dev->ieee80211_ptr;
9660
9661         if (wdev->iftype != NL80211_IFTYPE_AP &&
9662             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9663                 return -EINVAL;
9664
9665         if (wdev->ap_unexpected_nlportid)
9666                 return -EBUSY;
9667
9668         wdev->ap_unexpected_nlportid = info->snd_portid;
9669         return 0;
9670 }
9671
9672 static int nl80211_probe_client(struct sk_buff *skb,
9673                                 struct genl_info *info)
9674 {
9675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9676         struct net_device *dev = info->user_ptr[1];
9677         struct wireless_dev *wdev = dev->ieee80211_ptr;
9678         struct sk_buff *msg;
9679         void *hdr;
9680         const u8 *addr;
9681         u64 cookie;
9682         int err;
9683
9684         if (wdev->iftype != NL80211_IFTYPE_AP &&
9685             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9686                 return -EOPNOTSUPP;
9687
9688         if (!info->attrs[NL80211_ATTR_MAC])
9689                 return -EINVAL;
9690
9691         if (!rdev->ops->probe_client)
9692                 return -EOPNOTSUPP;
9693
9694         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9695         if (!msg)
9696                 return -ENOMEM;
9697
9698         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9699                              NL80211_CMD_PROBE_CLIENT);
9700         if (!hdr) {
9701                 err = -ENOBUFS;
9702                 goto free_msg;
9703         }
9704
9705         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9706
9707         err = rdev_probe_client(rdev, dev, addr, &cookie);
9708         if (err)
9709                 goto free_msg;
9710
9711         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9712                 goto nla_put_failure;
9713
9714         genlmsg_end(msg, hdr);
9715
9716         return genlmsg_reply(msg, info);
9717
9718  nla_put_failure:
9719         err = -ENOBUFS;
9720  free_msg:
9721         nlmsg_free(msg);
9722         return err;
9723 }
9724
9725 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9726 {
9727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9728         struct cfg80211_beacon_registration *reg, *nreg;
9729         int rv;
9730
9731         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9732                 return -EOPNOTSUPP;
9733
9734         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9735         if (!nreg)
9736                 return -ENOMEM;
9737
9738         /* First, check if already registered. */
9739         spin_lock_bh(&rdev->beacon_registrations_lock);
9740         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9741                 if (reg->nlportid == info->snd_portid) {
9742                         rv = -EALREADY;
9743                         goto out_err;
9744                 }
9745         }
9746         /* Add it to the list */
9747         nreg->nlportid = info->snd_portid;
9748         list_add(&nreg->list, &rdev->beacon_registrations);
9749
9750         spin_unlock_bh(&rdev->beacon_registrations_lock);
9751
9752         return 0;
9753 out_err:
9754         spin_unlock_bh(&rdev->beacon_registrations_lock);
9755         kfree(nreg);
9756         return rv;
9757 }
9758
9759 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9760 {
9761         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9762         struct wireless_dev *wdev = info->user_ptr[1];
9763         int err;
9764
9765         if (!rdev->ops->start_p2p_device)
9766                 return -EOPNOTSUPP;
9767
9768         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9769                 return -EOPNOTSUPP;
9770
9771         if (wdev->p2p_started)
9772                 return 0;
9773
9774         if (rfkill_blocked(rdev->rfkill))
9775                 return -ERFKILL;
9776
9777         err = rdev_start_p2p_device(rdev, wdev);
9778         if (err)
9779                 return err;
9780
9781         wdev->p2p_started = true;
9782         rdev->opencount++;
9783
9784         return 0;
9785 }
9786
9787 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9788 {
9789         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9790         struct wireless_dev *wdev = info->user_ptr[1];
9791
9792         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9793                 return -EOPNOTSUPP;
9794
9795         if (!rdev->ops->stop_p2p_device)
9796                 return -EOPNOTSUPP;
9797
9798         cfg80211_stop_p2p_device(rdev, wdev);
9799
9800         return 0;
9801 }
9802
9803 static int nl80211_get_protocol_features(struct sk_buff *skb,
9804                                          struct genl_info *info)
9805 {
9806         void *hdr;
9807         struct sk_buff *msg;
9808
9809         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9810         if (!msg)
9811                 return -ENOMEM;
9812
9813         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9814                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9815         if (!hdr)
9816                 goto nla_put_failure;
9817
9818         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9819                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9820                 goto nla_put_failure;
9821
9822         genlmsg_end(msg, hdr);
9823         return genlmsg_reply(msg, info);
9824
9825  nla_put_failure:
9826         kfree_skb(msg);
9827         return -ENOBUFS;
9828 }
9829
9830 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9831 {
9832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9833         struct cfg80211_update_ft_ies_params ft_params;
9834         struct net_device *dev = info->user_ptr[1];
9835
9836         if (!rdev->ops->update_ft_ies)
9837                 return -EOPNOTSUPP;
9838
9839         if (!info->attrs[NL80211_ATTR_MDID] ||
9840             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9841                 return -EINVAL;
9842
9843         memset(&ft_params, 0, sizeof(ft_params));
9844         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
9845         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9846         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9847
9848         return rdev_update_ft_ies(rdev, dev, &ft_params);
9849 }
9850
9851 static int nl80211_crit_protocol_start(struct sk_buff *skb,
9852                                        struct genl_info *info)
9853 {
9854         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9855         struct wireless_dev *wdev = info->user_ptr[1];
9856         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
9857         u16 duration;
9858         int ret;
9859
9860         if (!rdev->ops->crit_proto_start)
9861                 return -EOPNOTSUPP;
9862
9863         if (WARN_ON(!rdev->ops->crit_proto_stop))
9864                 return -EINVAL;
9865
9866         if (rdev->crit_proto_nlportid)
9867                 return -EBUSY;
9868
9869         /* determine protocol if provided */
9870         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
9871                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
9872
9873         if (proto >= NUM_NL80211_CRIT_PROTO)
9874                 return -EINVAL;
9875
9876         /* timeout must be provided */
9877         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
9878                 return -EINVAL;
9879
9880         duration =
9881                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
9882
9883         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
9884                 return -ERANGE;
9885
9886         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
9887         if (!ret)
9888                 rdev->crit_proto_nlportid = info->snd_portid;
9889
9890         return ret;
9891 }
9892
9893 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
9894                                       struct genl_info *info)
9895 {
9896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9897         struct wireless_dev *wdev = info->user_ptr[1];
9898
9899         if (!rdev->ops->crit_proto_stop)
9900                 return -EOPNOTSUPP;
9901
9902         if (rdev->crit_proto_nlportid) {
9903                 rdev->crit_proto_nlportid = 0;
9904                 rdev_crit_proto_stop(rdev, wdev);
9905         }
9906         return 0;
9907 }
9908
9909 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
9910 {
9911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9912         struct wireless_dev *wdev =
9913                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
9914         int i, err;
9915         u32 vid, subcmd;
9916
9917         if (!rdev->wiphy.vendor_commands)
9918                 return -EOPNOTSUPP;
9919
9920         if (IS_ERR(wdev)) {
9921                 err = PTR_ERR(wdev);
9922                 if (err != -EINVAL)
9923                         return err;
9924                 wdev = NULL;
9925         } else if (wdev->wiphy != &rdev->wiphy) {
9926                 return -EINVAL;
9927         }
9928
9929         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
9930             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
9931                 return -EINVAL;
9932
9933         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
9934         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
9935         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
9936                 const struct wiphy_vendor_command *vcmd;
9937                 void *data = NULL;
9938                 int len = 0;
9939
9940                 vcmd = &rdev->wiphy.vendor_commands[i];
9941
9942                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
9943                         continue;
9944
9945                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
9946                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
9947                         if (!wdev)
9948                                 return -EINVAL;
9949                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
9950                             !wdev->netdev)
9951                                 return -EINVAL;
9952
9953                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
9954                                 if (wdev->netdev &&
9955                                     !netif_running(wdev->netdev))
9956                                         return -ENETDOWN;
9957                                 if (!wdev->netdev && !wdev->p2p_started)
9958                                         return -ENETDOWN;
9959                         }
9960
9961                         if (!vcmd->doit)
9962                                 return -EOPNOTSUPP;
9963                 } else {
9964                         wdev = NULL;
9965                 }
9966
9967                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
9968                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9969                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9970                 }
9971
9972                 rdev->cur_cmd_info = info;
9973                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
9974                                                           data, len);
9975                 rdev->cur_cmd_info = NULL;
9976                 return err;
9977         }
9978
9979         return -EOPNOTSUPP;
9980 }
9981
9982 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
9983                                        struct netlink_callback *cb,
9984                                        struct cfg80211_registered_device **rdev,
9985                                        struct wireless_dev **wdev)
9986 {
9987         u32 vid, subcmd;
9988         unsigned int i;
9989         int vcmd_idx = -1;
9990         int err;
9991         void *data = NULL;
9992         unsigned int data_len = 0;
9993
9994         rtnl_lock();
9995
9996         if (cb->args[0]) {
9997                 /* subtract the 1 again here */
9998                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
9999                 struct wireless_dev *tmp;
10000
10001                 if (!wiphy) {
10002                         err = -ENODEV;
10003                         goto out_unlock;
10004                 }
10005                 *rdev = wiphy_to_rdev(wiphy);
10006                 *wdev = NULL;
10007
10008                 if (cb->args[1]) {
10009                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10010                                 if (tmp->identifier == cb->args[1] - 1) {
10011                                         *wdev = tmp;
10012                                         break;
10013                                 }
10014                         }
10015                 }
10016
10017                 /* keep rtnl locked in successful case */
10018                 return 0;
10019         }
10020
10021         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10022                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10023                           nl80211_policy);
10024         if (err)
10025                 goto out_unlock;
10026
10027         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10028             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10029                 err = -EINVAL;
10030                 goto out_unlock;
10031         }
10032
10033         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10034                                            nl80211_fam.attrbuf);
10035         if (IS_ERR(*wdev))
10036                 *wdev = NULL;
10037
10038         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10039                                            nl80211_fam.attrbuf);
10040         if (IS_ERR(*rdev)) {
10041                 err = PTR_ERR(*rdev);
10042                 goto out_unlock;
10043         }
10044
10045         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10046         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10047
10048         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10049                 const struct wiphy_vendor_command *vcmd;
10050
10051                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10052
10053                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10054                         continue;
10055
10056                 if (!vcmd->dumpit) {
10057                         err = -EOPNOTSUPP;
10058                         goto out_unlock;
10059                 }
10060
10061                 vcmd_idx = i;
10062                 break;
10063         }
10064
10065         if (vcmd_idx < 0) {
10066                 err = -EOPNOTSUPP;
10067                 goto out_unlock;
10068         }
10069
10070         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10071                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10072                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10073         }
10074
10075         /* 0 is the first index - add 1 to parse only once */
10076         cb->args[0] = (*rdev)->wiphy_idx + 1;
10077         /* add 1 to know if it was NULL */
10078         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10079         cb->args[2] = vcmd_idx;
10080         cb->args[3] = (unsigned long)data;
10081         cb->args[4] = data_len;
10082
10083         /* keep rtnl locked in successful case */
10084         return 0;
10085  out_unlock:
10086         rtnl_unlock();
10087         return err;
10088 }
10089
10090 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10091                                    struct netlink_callback *cb)
10092 {
10093         struct cfg80211_registered_device *rdev;
10094         struct wireless_dev *wdev;
10095         unsigned int vcmd_idx;
10096         const struct wiphy_vendor_command *vcmd;
10097         void *data;
10098         int data_len;
10099         int err;
10100         struct nlattr *vendor_data;
10101
10102         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10103         if (err)
10104                 return err;
10105
10106         vcmd_idx = cb->args[2];
10107         data = (void *)cb->args[3];
10108         data_len = cb->args[4];
10109         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10110
10111         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10112                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10113                 if (!wdev)
10114                         return -EINVAL;
10115                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10116                     !wdev->netdev)
10117                         return -EINVAL;
10118
10119                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10120                         if (wdev->netdev &&
10121                             !netif_running(wdev->netdev))
10122                                 return -ENETDOWN;
10123                         if (!wdev->netdev && !wdev->p2p_started)
10124                                 return -ENETDOWN;
10125                 }
10126         }
10127
10128         while (1) {
10129                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10130                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10131                                            NL80211_CMD_VENDOR);
10132                 if (!hdr)
10133                         break;
10134
10135                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10136                     (wdev && nla_put_u64(skb, NL80211_ATTR_WDEV,
10137                                          wdev_id(wdev)))) {
10138                         genlmsg_cancel(skb, hdr);
10139                         break;
10140                 }
10141
10142                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10143                 if (!vendor_data) {
10144                         genlmsg_cancel(skb, hdr);
10145                         break;
10146                 }
10147
10148                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10149                                    (unsigned long *)&cb->args[5]);
10150                 nla_nest_end(skb, vendor_data);
10151
10152                 if (err == -ENOBUFS || err == -ENOENT) {
10153                         genlmsg_cancel(skb, hdr);
10154                         break;
10155                 } else if (err) {
10156                         genlmsg_cancel(skb, hdr);
10157                         goto out;
10158                 }
10159
10160                 genlmsg_end(skb, hdr);
10161         }
10162
10163         err = skb->len;
10164  out:
10165         rtnl_unlock();
10166         return err;
10167 }
10168
10169 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10170                                            enum nl80211_commands cmd,
10171                                            enum nl80211_attrs attr,
10172                                            int approxlen)
10173 {
10174         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10175
10176         if (WARN_ON(!rdev->cur_cmd_info))
10177                 return NULL;
10178
10179         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10180                                            rdev->cur_cmd_info->snd_portid,
10181                                            rdev->cur_cmd_info->snd_seq,
10182                                            cmd, attr, NULL, GFP_KERNEL);
10183 }
10184 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10185
10186 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10187 {
10188         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10189         void *hdr = ((void **)skb->cb)[1];
10190         struct nlattr *data = ((void **)skb->cb)[2];
10191
10192         /* clear CB data for netlink core to own from now on */
10193         memset(skb->cb, 0, sizeof(skb->cb));
10194
10195         if (WARN_ON(!rdev->cur_cmd_info)) {
10196                 kfree_skb(skb);
10197                 return -EINVAL;
10198         }
10199
10200         nla_nest_end(skb, data);
10201         genlmsg_end(skb, hdr);
10202         return genlmsg_reply(skb, rdev->cur_cmd_info);
10203 }
10204 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10205
10206
10207 static int nl80211_set_qos_map(struct sk_buff *skb,
10208                                struct genl_info *info)
10209 {
10210         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10211         struct cfg80211_qos_map *qos_map = NULL;
10212         struct net_device *dev = info->user_ptr[1];
10213         u8 *pos, len, num_des, des_len, des;
10214         int ret;
10215
10216         if (!rdev->ops->set_qos_map)
10217                 return -EOPNOTSUPP;
10218
10219         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10220                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10221                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10222
10223                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10224                     len > IEEE80211_QOS_MAP_LEN_MAX)
10225                         return -EINVAL;
10226
10227                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10228                 if (!qos_map)
10229                         return -ENOMEM;
10230
10231                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10232                 if (num_des) {
10233                         des_len = num_des *
10234                                 sizeof(struct cfg80211_dscp_exception);
10235                         memcpy(qos_map->dscp_exception, pos, des_len);
10236                         qos_map->num_des = num_des;
10237                         for (des = 0; des < num_des; des++) {
10238                                 if (qos_map->dscp_exception[des].up > 7) {
10239                                         kfree(qos_map);
10240                                         return -EINVAL;
10241                                 }
10242                         }
10243                         pos += des_len;
10244                 }
10245                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10246         }
10247
10248         wdev_lock(dev->ieee80211_ptr);
10249         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10250         if (!ret)
10251                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10252         wdev_unlock(dev->ieee80211_ptr);
10253
10254         kfree(qos_map);
10255         return ret;
10256 }
10257
10258 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10259 {
10260         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10261         struct net_device *dev = info->user_ptr[1];
10262         struct wireless_dev *wdev = dev->ieee80211_ptr;
10263         const u8 *peer;
10264         u8 tsid, up;
10265         u16 admitted_time = 0;
10266         int err;
10267
10268         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10269                 return -EOPNOTSUPP;
10270
10271         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10272             !info->attrs[NL80211_ATTR_USER_PRIO])
10273                 return -EINVAL;
10274
10275         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10276         if (tsid >= IEEE80211_NUM_TIDS)
10277                 return -EINVAL;
10278
10279         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10280         if (up >= IEEE80211_NUM_UPS)
10281                 return -EINVAL;
10282
10283         /* WMM uses TIDs 0-7 even for TSPEC */
10284         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10285                 /* TODO: handle 802.11 TSPEC/admission control
10286                  * need more attributes for that (e.g. BA session requirement);
10287                  * change the WMM adminssion test above to allow both then
10288                  */
10289                 return -EINVAL;
10290         }
10291
10292         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10293
10294         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10295                 admitted_time =
10296                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10297                 if (!admitted_time)
10298                         return -EINVAL;
10299         }
10300
10301         wdev_lock(wdev);
10302         switch (wdev->iftype) {
10303         case NL80211_IFTYPE_STATION:
10304         case NL80211_IFTYPE_P2P_CLIENT:
10305                 if (wdev->current_bss)
10306                         break;
10307                 err = -ENOTCONN;
10308                 goto out;
10309         default:
10310                 err = -EOPNOTSUPP;
10311                 goto out;
10312         }
10313
10314         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10315
10316  out:
10317         wdev_unlock(wdev);
10318         return err;
10319 }
10320
10321 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10322 {
10323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10324         struct net_device *dev = info->user_ptr[1];
10325         struct wireless_dev *wdev = dev->ieee80211_ptr;
10326         const u8 *peer;
10327         u8 tsid;
10328         int err;
10329
10330         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10331                 return -EINVAL;
10332
10333         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10334         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10335
10336         wdev_lock(wdev);
10337         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10338         wdev_unlock(wdev);
10339
10340         return err;
10341 }
10342
10343 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10344                                        struct genl_info *info)
10345 {
10346         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10347         struct net_device *dev = info->user_ptr[1];
10348         struct wireless_dev *wdev = dev->ieee80211_ptr;
10349         struct cfg80211_chan_def chandef = {};
10350         const u8 *addr;
10351         u8 oper_class;
10352         int err;
10353
10354         if (!rdev->ops->tdls_channel_switch ||
10355             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10356                 return -EOPNOTSUPP;
10357
10358         switch (dev->ieee80211_ptr->iftype) {
10359         case NL80211_IFTYPE_STATION:
10360         case NL80211_IFTYPE_P2P_CLIENT:
10361                 break;
10362         default:
10363                 return -EOPNOTSUPP;
10364         }
10365
10366         if (!info->attrs[NL80211_ATTR_MAC] ||
10367             !info->attrs[NL80211_ATTR_OPER_CLASS])
10368                 return -EINVAL;
10369
10370         err = nl80211_parse_chandef(rdev, info, &chandef);
10371         if (err)
10372                 return err;
10373
10374         /*
10375          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10376          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10377          * specification is not defined for them.
10378          */
10379         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
10380             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10381             chandef.width != NL80211_CHAN_WIDTH_20)
10382                 return -EINVAL;
10383
10384         /* we will be active on the TDLS link */
10385         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10386                                            wdev->iftype))
10387                 return -EINVAL;
10388
10389         /* don't allow switching to DFS channels */
10390         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10391                 return -EINVAL;
10392
10393         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10394         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10395
10396         wdev_lock(wdev);
10397         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10398         wdev_unlock(wdev);
10399
10400         return err;
10401 }
10402
10403 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10404                                               struct genl_info *info)
10405 {
10406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10407         struct net_device *dev = info->user_ptr[1];
10408         struct wireless_dev *wdev = dev->ieee80211_ptr;
10409         const u8 *addr;
10410
10411         if (!rdev->ops->tdls_channel_switch ||
10412             !rdev->ops->tdls_cancel_channel_switch ||
10413             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10414                 return -EOPNOTSUPP;
10415
10416         switch (dev->ieee80211_ptr->iftype) {
10417         case NL80211_IFTYPE_STATION:
10418         case NL80211_IFTYPE_P2P_CLIENT:
10419                 break;
10420         default:
10421                 return -EOPNOTSUPP;
10422         }
10423
10424         if (!info->attrs[NL80211_ATTR_MAC])
10425                 return -EINVAL;
10426
10427         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10428
10429         wdev_lock(wdev);
10430         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10431         wdev_unlock(wdev);
10432
10433         return 0;
10434 }
10435
10436 #define NL80211_FLAG_NEED_WIPHY         0x01
10437 #define NL80211_FLAG_NEED_NETDEV        0x02
10438 #define NL80211_FLAG_NEED_RTNL          0x04
10439 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10440 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10441                                          NL80211_FLAG_CHECK_NETDEV_UP)
10442 #define NL80211_FLAG_NEED_WDEV          0x10
10443 /* If a netdev is associated, it must be UP, P2P must be started */
10444 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10445                                          NL80211_FLAG_CHECK_NETDEV_UP)
10446 #define NL80211_FLAG_CLEAR_SKB          0x20
10447
10448 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10449                             struct genl_info *info)
10450 {
10451         struct cfg80211_registered_device *rdev;
10452         struct wireless_dev *wdev;
10453         struct net_device *dev;
10454         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10455
10456         if (rtnl)
10457                 rtnl_lock();
10458
10459         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10460                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10461                 if (IS_ERR(rdev)) {
10462                         if (rtnl)
10463                                 rtnl_unlock();
10464                         return PTR_ERR(rdev);
10465                 }
10466                 info->user_ptr[0] = rdev;
10467         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10468                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10469                 ASSERT_RTNL();
10470
10471                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10472                                                   info->attrs);
10473                 if (IS_ERR(wdev)) {
10474                         if (rtnl)
10475                                 rtnl_unlock();
10476                         return PTR_ERR(wdev);
10477                 }
10478
10479                 dev = wdev->netdev;
10480                 rdev = wiphy_to_rdev(wdev->wiphy);
10481
10482                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10483                         if (!dev) {
10484                                 if (rtnl)
10485                                         rtnl_unlock();
10486                                 return -EINVAL;
10487                         }
10488
10489                         info->user_ptr[1] = dev;
10490                 } else {
10491                         info->user_ptr[1] = wdev;
10492                 }
10493
10494                 if (dev) {
10495                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10496                             !netif_running(dev)) {
10497                                 if (rtnl)
10498                                         rtnl_unlock();
10499                                 return -ENETDOWN;
10500                         }
10501
10502                         dev_hold(dev);
10503                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10504                         if (!wdev->p2p_started) {
10505                                 if (rtnl)
10506                                         rtnl_unlock();
10507                                 return -ENETDOWN;
10508                         }
10509                 }
10510
10511                 info->user_ptr[0] = rdev;
10512         }
10513
10514         return 0;
10515 }
10516
10517 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10518                               struct genl_info *info)
10519 {
10520         if (info->user_ptr[1]) {
10521                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10522                         struct wireless_dev *wdev = info->user_ptr[1];
10523
10524                         if (wdev->netdev)
10525                                 dev_put(wdev->netdev);
10526                 } else {
10527                         dev_put(info->user_ptr[1]);
10528                 }
10529         }
10530
10531         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10532                 rtnl_unlock();
10533
10534         /* If needed, clear the netlink message payload from the SKB
10535          * as it might contain key data that shouldn't stick around on
10536          * the heap after the SKB is freed. The netlink message header
10537          * is still needed for further processing, so leave it intact.
10538          */
10539         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10540                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10541
10542                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10543         }
10544 }
10545
10546 static const struct genl_ops nl80211_ops[] = {
10547         {
10548                 .cmd = NL80211_CMD_GET_WIPHY,
10549                 .doit = nl80211_get_wiphy,
10550                 .dumpit = nl80211_dump_wiphy,
10551                 .done = nl80211_dump_wiphy_done,
10552                 .policy = nl80211_policy,
10553                 /* can be retrieved by unprivileged users */
10554                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10555                                   NL80211_FLAG_NEED_RTNL,
10556         },
10557         {
10558                 .cmd = NL80211_CMD_SET_WIPHY,
10559                 .doit = nl80211_set_wiphy,
10560                 .policy = nl80211_policy,
10561                 .flags = GENL_ADMIN_PERM,
10562                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10563         },
10564         {
10565                 .cmd = NL80211_CMD_GET_INTERFACE,
10566                 .doit = nl80211_get_interface,
10567                 .dumpit = nl80211_dump_interface,
10568                 .policy = nl80211_policy,
10569                 /* can be retrieved by unprivileged users */
10570                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10571                                   NL80211_FLAG_NEED_RTNL,
10572         },
10573         {
10574                 .cmd = NL80211_CMD_SET_INTERFACE,
10575                 .doit = nl80211_set_interface,
10576                 .policy = nl80211_policy,
10577                 .flags = GENL_ADMIN_PERM,
10578                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10579                                   NL80211_FLAG_NEED_RTNL,
10580         },
10581         {
10582                 .cmd = NL80211_CMD_NEW_INTERFACE,
10583                 .doit = nl80211_new_interface,
10584                 .policy = nl80211_policy,
10585                 .flags = GENL_ADMIN_PERM,
10586                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10587                                   NL80211_FLAG_NEED_RTNL,
10588         },
10589         {
10590                 .cmd = NL80211_CMD_DEL_INTERFACE,
10591                 .doit = nl80211_del_interface,
10592                 .policy = nl80211_policy,
10593                 .flags = GENL_ADMIN_PERM,
10594                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10595                                   NL80211_FLAG_NEED_RTNL,
10596         },
10597         {
10598                 .cmd = NL80211_CMD_GET_KEY,
10599                 .doit = nl80211_get_key,
10600                 .policy = nl80211_policy,
10601                 .flags = GENL_ADMIN_PERM,
10602                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10603                                   NL80211_FLAG_NEED_RTNL,
10604         },
10605         {
10606                 .cmd = NL80211_CMD_SET_KEY,
10607                 .doit = nl80211_set_key,
10608                 .policy = nl80211_policy,
10609                 .flags = GENL_ADMIN_PERM,
10610                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10611                                   NL80211_FLAG_NEED_RTNL |
10612                                   NL80211_FLAG_CLEAR_SKB,
10613         },
10614         {
10615                 .cmd = NL80211_CMD_NEW_KEY,
10616                 .doit = nl80211_new_key,
10617                 .policy = nl80211_policy,
10618                 .flags = GENL_ADMIN_PERM,
10619                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10620                                   NL80211_FLAG_NEED_RTNL |
10621                                   NL80211_FLAG_CLEAR_SKB,
10622         },
10623         {
10624                 .cmd = NL80211_CMD_DEL_KEY,
10625                 .doit = nl80211_del_key,
10626                 .policy = nl80211_policy,
10627                 .flags = GENL_ADMIN_PERM,
10628                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10629                                   NL80211_FLAG_NEED_RTNL,
10630         },
10631         {
10632                 .cmd = NL80211_CMD_SET_BEACON,
10633                 .policy = nl80211_policy,
10634                 .flags = GENL_ADMIN_PERM,
10635                 .doit = nl80211_set_beacon,
10636                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10637                                   NL80211_FLAG_NEED_RTNL,
10638         },
10639         {
10640                 .cmd = NL80211_CMD_START_AP,
10641                 .policy = nl80211_policy,
10642                 .flags = GENL_ADMIN_PERM,
10643                 .doit = nl80211_start_ap,
10644                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10645                                   NL80211_FLAG_NEED_RTNL,
10646         },
10647         {
10648                 .cmd = NL80211_CMD_STOP_AP,
10649                 .policy = nl80211_policy,
10650                 .flags = GENL_ADMIN_PERM,
10651                 .doit = nl80211_stop_ap,
10652                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10653                                   NL80211_FLAG_NEED_RTNL,
10654         },
10655         {
10656                 .cmd = NL80211_CMD_GET_STATION,
10657                 .doit = nl80211_get_station,
10658                 .dumpit = nl80211_dump_station,
10659                 .policy = nl80211_policy,
10660                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10661                                   NL80211_FLAG_NEED_RTNL,
10662         },
10663         {
10664                 .cmd = NL80211_CMD_SET_STATION,
10665                 .doit = nl80211_set_station,
10666                 .policy = nl80211_policy,
10667                 .flags = GENL_ADMIN_PERM,
10668                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10669                                   NL80211_FLAG_NEED_RTNL,
10670         },
10671         {
10672                 .cmd = NL80211_CMD_NEW_STATION,
10673                 .doit = nl80211_new_station,
10674                 .policy = nl80211_policy,
10675                 .flags = GENL_ADMIN_PERM,
10676                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10677                                   NL80211_FLAG_NEED_RTNL,
10678         },
10679         {
10680                 .cmd = NL80211_CMD_DEL_STATION,
10681                 .doit = nl80211_del_station,
10682                 .policy = nl80211_policy,
10683                 .flags = GENL_ADMIN_PERM,
10684                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10685                                   NL80211_FLAG_NEED_RTNL,
10686         },
10687         {
10688                 .cmd = NL80211_CMD_GET_MPATH,
10689                 .doit = nl80211_get_mpath,
10690                 .dumpit = nl80211_dump_mpath,
10691                 .policy = nl80211_policy,
10692                 .flags = GENL_ADMIN_PERM,
10693                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10694                                   NL80211_FLAG_NEED_RTNL,
10695         },
10696         {
10697                 .cmd = NL80211_CMD_GET_MPP,
10698                 .doit = nl80211_get_mpp,
10699                 .dumpit = nl80211_dump_mpp,
10700                 .policy = nl80211_policy,
10701                 .flags = GENL_ADMIN_PERM,
10702                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10703                                   NL80211_FLAG_NEED_RTNL,
10704         },
10705         {
10706                 .cmd = NL80211_CMD_SET_MPATH,
10707                 .doit = nl80211_set_mpath,
10708                 .policy = nl80211_policy,
10709                 .flags = GENL_ADMIN_PERM,
10710                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10711                                   NL80211_FLAG_NEED_RTNL,
10712         },
10713         {
10714                 .cmd = NL80211_CMD_NEW_MPATH,
10715                 .doit = nl80211_new_mpath,
10716                 .policy = nl80211_policy,
10717                 .flags = GENL_ADMIN_PERM,
10718                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10719                                   NL80211_FLAG_NEED_RTNL,
10720         },
10721         {
10722                 .cmd = NL80211_CMD_DEL_MPATH,
10723                 .doit = nl80211_del_mpath,
10724                 .policy = nl80211_policy,
10725                 .flags = GENL_ADMIN_PERM,
10726                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10727                                   NL80211_FLAG_NEED_RTNL,
10728         },
10729         {
10730                 .cmd = NL80211_CMD_SET_BSS,
10731                 .doit = nl80211_set_bss,
10732                 .policy = nl80211_policy,
10733                 .flags = GENL_ADMIN_PERM,
10734                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10735                                   NL80211_FLAG_NEED_RTNL,
10736         },
10737         {
10738                 .cmd = NL80211_CMD_GET_REG,
10739                 .doit = nl80211_get_reg_do,
10740                 .dumpit = nl80211_get_reg_dump,
10741                 .policy = nl80211_policy,
10742                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10743                 /* can be retrieved by unprivileged users */
10744         },
10745         {
10746                 .cmd = NL80211_CMD_SET_REG,
10747                 .doit = nl80211_set_reg,
10748                 .policy = nl80211_policy,
10749                 .flags = GENL_ADMIN_PERM,
10750                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10751         },
10752         {
10753                 .cmd = NL80211_CMD_REQ_SET_REG,
10754                 .doit = nl80211_req_set_reg,
10755                 .policy = nl80211_policy,
10756                 .flags = GENL_ADMIN_PERM,
10757         },
10758         {
10759                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
10760                 .doit = nl80211_get_mesh_config,
10761                 .policy = nl80211_policy,
10762                 /* can be retrieved by unprivileged users */
10763                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10764                                   NL80211_FLAG_NEED_RTNL,
10765         },
10766         {
10767                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
10768                 .doit = nl80211_update_mesh_config,
10769                 .policy = nl80211_policy,
10770                 .flags = GENL_ADMIN_PERM,
10771                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10772                                   NL80211_FLAG_NEED_RTNL,
10773         },
10774         {
10775                 .cmd = NL80211_CMD_TRIGGER_SCAN,
10776                 .doit = nl80211_trigger_scan,
10777                 .policy = nl80211_policy,
10778                 .flags = GENL_ADMIN_PERM,
10779                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10780                                   NL80211_FLAG_NEED_RTNL,
10781         },
10782         {
10783                 .cmd = NL80211_CMD_GET_SCAN,
10784                 .policy = nl80211_policy,
10785                 .dumpit = nl80211_dump_scan,
10786         },
10787         {
10788                 .cmd = NL80211_CMD_START_SCHED_SCAN,
10789                 .doit = nl80211_start_sched_scan,
10790                 .policy = nl80211_policy,
10791                 .flags = GENL_ADMIN_PERM,
10792                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10793                                   NL80211_FLAG_NEED_RTNL,
10794         },
10795         {
10796                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
10797                 .doit = nl80211_stop_sched_scan,
10798                 .policy = nl80211_policy,
10799                 .flags = GENL_ADMIN_PERM,
10800                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10801                                   NL80211_FLAG_NEED_RTNL,
10802         },
10803         {
10804                 .cmd = NL80211_CMD_AUTHENTICATE,
10805                 .doit = nl80211_authenticate,
10806                 .policy = nl80211_policy,
10807                 .flags = GENL_ADMIN_PERM,
10808                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10809                                   NL80211_FLAG_NEED_RTNL |
10810                                   NL80211_FLAG_CLEAR_SKB,
10811         },
10812         {
10813                 .cmd = NL80211_CMD_ASSOCIATE,
10814                 .doit = nl80211_associate,
10815                 .policy = nl80211_policy,
10816                 .flags = GENL_ADMIN_PERM,
10817                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10818                                   NL80211_FLAG_NEED_RTNL,
10819         },
10820         {
10821                 .cmd = NL80211_CMD_DEAUTHENTICATE,
10822                 .doit = nl80211_deauthenticate,
10823                 .policy = nl80211_policy,
10824                 .flags = GENL_ADMIN_PERM,
10825                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10826                                   NL80211_FLAG_NEED_RTNL,
10827         },
10828         {
10829                 .cmd = NL80211_CMD_DISASSOCIATE,
10830                 .doit = nl80211_disassociate,
10831                 .policy = nl80211_policy,
10832                 .flags = GENL_ADMIN_PERM,
10833                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10834                                   NL80211_FLAG_NEED_RTNL,
10835         },
10836         {
10837                 .cmd = NL80211_CMD_JOIN_IBSS,
10838                 .doit = nl80211_join_ibss,
10839                 .policy = nl80211_policy,
10840                 .flags = GENL_ADMIN_PERM,
10841                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10842                                   NL80211_FLAG_NEED_RTNL,
10843         },
10844         {
10845                 .cmd = NL80211_CMD_LEAVE_IBSS,
10846                 .doit = nl80211_leave_ibss,
10847                 .policy = nl80211_policy,
10848                 .flags = GENL_ADMIN_PERM,
10849                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10850                                   NL80211_FLAG_NEED_RTNL,
10851         },
10852 #ifdef CONFIG_NL80211_TESTMODE
10853         {
10854                 .cmd = NL80211_CMD_TESTMODE,
10855                 .doit = nl80211_testmode_do,
10856                 .dumpit = nl80211_testmode_dump,
10857                 .policy = nl80211_policy,
10858                 .flags = GENL_ADMIN_PERM,
10859                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10860                                   NL80211_FLAG_NEED_RTNL,
10861         },
10862 #endif
10863         {
10864                 .cmd = NL80211_CMD_CONNECT,
10865                 .doit = nl80211_connect,
10866                 .policy = nl80211_policy,
10867                 .flags = GENL_ADMIN_PERM,
10868                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10869                                   NL80211_FLAG_NEED_RTNL,
10870         },
10871         {
10872                 .cmd = NL80211_CMD_DISCONNECT,
10873                 .doit = nl80211_disconnect,
10874                 .policy = nl80211_policy,
10875                 .flags = GENL_ADMIN_PERM,
10876                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10877                                   NL80211_FLAG_NEED_RTNL,
10878         },
10879         {
10880                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
10881                 .doit = nl80211_wiphy_netns,
10882                 .policy = nl80211_policy,
10883                 .flags = GENL_ADMIN_PERM,
10884                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10885                                   NL80211_FLAG_NEED_RTNL,
10886         },
10887         {
10888                 .cmd = NL80211_CMD_GET_SURVEY,
10889                 .policy = nl80211_policy,
10890                 .dumpit = nl80211_dump_survey,
10891         },
10892         {
10893                 .cmd = NL80211_CMD_SET_PMKSA,
10894                 .doit = nl80211_setdel_pmksa,
10895                 .policy = nl80211_policy,
10896                 .flags = GENL_ADMIN_PERM,
10897                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10898                                   NL80211_FLAG_NEED_RTNL,
10899         },
10900         {
10901                 .cmd = NL80211_CMD_DEL_PMKSA,
10902                 .doit = nl80211_setdel_pmksa,
10903                 .policy = nl80211_policy,
10904                 .flags = GENL_ADMIN_PERM,
10905                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10906                                   NL80211_FLAG_NEED_RTNL,
10907         },
10908         {
10909                 .cmd = NL80211_CMD_FLUSH_PMKSA,
10910                 .doit = nl80211_flush_pmksa,
10911                 .policy = nl80211_policy,
10912                 .flags = GENL_ADMIN_PERM,
10913                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10914                                   NL80211_FLAG_NEED_RTNL,
10915         },
10916         {
10917                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
10918                 .doit = nl80211_remain_on_channel,
10919                 .policy = nl80211_policy,
10920                 .flags = GENL_ADMIN_PERM,
10921                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10922                                   NL80211_FLAG_NEED_RTNL,
10923         },
10924         {
10925                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10926                 .doit = nl80211_cancel_remain_on_channel,
10927                 .policy = nl80211_policy,
10928                 .flags = GENL_ADMIN_PERM,
10929                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10930                                   NL80211_FLAG_NEED_RTNL,
10931         },
10932         {
10933                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
10934                 .doit = nl80211_set_tx_bitrate_mask,
10935                 .policy = nl80211_policy,
10936                 .flags = GENL_ADMIN_PERM,
10937                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10938                                   NL80211_FLAG_NEED_RTNL,
10939         },
10940         {
10941                 .cmd = NL80211_CMD_REGISTER_FRAME,
10942                 .doit = nl80211_register_mgmt,
10943                 .policy = nl80211_policy,
10944                 .flags = GENL_ADMIN_PERM,
10945                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10946                                   NL80211_FLAG_NEED_RTNL,
10947         },
10948         {
10949                 .cmd = NL80211_CMD_FRAME,
10950                 .doit = nl80211_tx_mgmt,
10951                 .policy = nl80211_policy,
10952                 .flags = GENL_ADMIN_PERM,
10953                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10954                                   NL80211_FLAG_NEED_RTNL,
10955         },
10956         {
10957                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
10958                 .doit = nl80211_tx_mgmt_cancel_wait,
10959                 .policy = nl80211_policy,
10960                 .flags = GENL_ADMIN_PERM,
10961                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10962                                   NL80211_FLAG_NEED_RTNL,
10963         },
10964         {
10965                 .cmd = NL80211_CMD_SET_POWER_SAVE,
10966                 .doit = nl80211_set_power_save,
10967                 .policy = nl80211_policy,
10968                 .flags = GENL_ADMIN_PERM,
10969                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10970                                   NL80211_FLAG_NEED_RTNL,
10971         },
10972         {
10973                 .cmd = NL80211_CMD_GET_POWER_SAVE,
10974                 .doit = nl80211_get_power_save,
10975                 .policy = nl80211_policy,
10976                 /* can be retrieved by unprivileged users */
10977                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10978                                   NL80211_FLAG_NEED_RTNL,
10979         },
10980         {
10981                 .cmd = NL80211_CMD_SET_CQM,
10982                 .doit = nl80211_set_cqm,
10983                 .policy = nl80211_policy,
10984                 .flags = GENL_ADMIN_PERM,
10985                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10986                                   NL80211_FLAG_NEED_RTNL,
10987         },
10988         {
10989                 .cmd = NL80211_CMD_SET_CHANNEL,
10990                 .doit = nl80211_set_channel,
10991                 .policy = nl80211_policy,
10992                 .flags = GENL_ADMIN_PERM,
10993                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10994                                   NL80211_FLAG_NEED_RTNL,
10995         },
10996         {
10997                 .cmd = NL80211_CMD_SET_WDS_PEER,
10998                 .doit = nl80211_set_wds_peer,
10999                 .policy = nl80211_policy,
11000                 .flags = GENL_ADMIN_PERM,
11001                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11002                                   NL80211_FLAG_NEED_RTNL,
11003         },
11004         {
11005                 .cmd = NL80211_CMD_JOIN_MESH,
11006                 .doit = nl80211_join_mesh,
11007                 .policy = nl80211_policy,
11008                 .flags = GENL_ADMIN_PERM,
11009                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11010                                   NL80211_FLAG_NEED_RTNL,
11011         },
11012         {
11013                 .cmd = NL80211_CMD_LEAVE_MESH,
11014                 .doit = nl80211_leave_mesh,
11015                 .policy = nl80211_policy,
11016                 .flags = GENL_ADMIN_PERM,
11017                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11018                                   NL80211_FLAG_NEED_RTNL,
11019         },
11020         {
11021                 .cmd = NL80211_CMD_JOIN_OCB,
11022                 .doit = nl80211_join_ocb,
11023                 .policy = nl80211_policy,
11024                 .flags = GENL_ADMIN_PERM,
11025                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11026                                   NL80211_FLAG_NEED_RTNL,
11027         },
11028         {
11029                 .cmd = NL80211_CMD_LEAVE_OCB,
11030                 .doit = nl80211_leave_ocb,
11031                 .policy = nl80211_policy,
11032                 .flags = GENL_ADMIN_PERM,
11033                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11034                                   NL80211_FLAG_NEED_RTNL,
11035         },
11036 #ifdef CONFIG_PM
11037         {
11038                 .cmd = NL80211_CMD_GET_WOWLAN,
11039                 .doit = nl80211_get_wowlan,
11040                 .policy = nl80211_policy,
11041                 /* can be retrieved by unprivileged users */
11042                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11043                                   NL80211_FLAG_NEED_RTNL,
11044         },
11045         {
11046                 .cmd = NL80211_CMD_SET_WOWLAN,
11047                 .doit = nl80211_set_wowlan,
11048                 .policy = nl80211_policy,
11049                 .flags = GENL_ADMIN_PERM,
11050                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11051                                   NL80211_FLAG_NEED_RTNL,
11052         },
11053 #endif
11054         {
11055                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11056                 .doit = nl80211_set_rekey_data,
11057                 .policy = nl80211_policy,
11058                 .flags = GENL_ADMIN_PERM,
11059                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11060                                   NL80211_FLAG_NEED_RTNL |
11061                                   NL80211_FLAG_CLEAR_SKB,
11062         },
11063         {
11064                 .cmd = NL80211_CMD_TDLS_MGMT,
11065                 .doit = nl80211_tdls_mgmt,
11066                 .policy = nl80211_policy,
11067                 .flags = GENL_ADMIN_PERM,
11068                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11069                                   NL80211_FLAG_NEED_RTNL,
11070         },
11071         {
11072                 .cmd = NL80211_CMD_TDLS_OPER,
11073                 .doit = nl80211_tdls_oper,
11074                 .policy = nl80211_policy,
11075                 .flags = GENL_ADMIN_PERM,
11076                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11077                                   NL80211_FLAG_NEED_RTNL,
11078         },
11079         {
11080                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11081                 .doit = nl80211_register_unexpected_frame,
11082                 .policy = nl80211_policy,
11083                 .flags = GENL_ADMIN_PERM,
11084                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11085                                   NL80211_FLAG_NEED_RTNL,
11086         },
11087         {
11088                 .cmd = NL80211_CMD_PROBE_CLIENT,
11089                 .doit = nl80211_probe_client,
11090                 .policy = nl80211_policy,
11091                 .flags = GENL_ADMIN_PERM,
11092                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11093                                   NL80211_FLAG_NEED_RTNL,
11094         },
11095         {
11096                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11097                 .doit = nl80211_register_beacons,
11098                 .policy = nl80211_policy,
11099                 .flags = GENL_ADMIN_PERM,
11100                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11101                                   NL80211_FLAG_NEED_RTNL,
11102         },
11103         {
11104                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11105                 .doit = nl80211_set_noack_map,
11106                 .policy = nl80211_policy,
11107                 .flags = GENL_ADMIN_PERM,
11108                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11109                                   NL80211_FLAG_NEED_RTNL,
11110         },
11111         {
11112                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11113                 .doit = nl80211_start_p2p_device,
11114                 .policy = nl80211_policy,
11115                 .flags = GENL_ADMIN_PERM,
11116                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11117                                   NL80211_FLAG_NEED_RTNL,
11118         },
11119         {
11120                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11121                 .doit = nl80211_stop_p2p_device,
11122                 .policy = nl80211_policy,
11123                 .flags = GENL_ADMIN_PERM,
11124                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11125                                   NL80211_FLAG_NEED_RTNL,
11126         },
11127         {
11128                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11129                 .doit = nl80211_set_mcast_rate,
11130                 .policy = nl80211_policy,
11131                 .flags = GENL_ADMIN_PERM,
11132                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11133                                   NL80211_FLAG_NEED_RTNL,
11134         },
11135         {
11136                 .cmd = NL80211_CMD_SET_MAC_ACL,
11137                 .doit = nl80211_set_mac_acl,
11138                 .policy = nl80211_policy,
11139                 .flags = GENL_ADMIN_PERM,
11140                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11141                                   NL80211_FLAG_NEED_RTNL,
11142         },
11143         {
11144                 .cmd = NL80211_CMD_RADAR_DETECT,
11145                 .doit = nl80211_start_radar_detection,
11146                 .policy = nl80211_policy,
11147                 .flags = GENL_ADMIN_PERM,
11148                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11149                                   NL80211_FLAG_NEED_RTNL,
11150         },
11151         {
11152                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11153                 .doit = nl80211_get_protocol_features,
11154                 .policy = nl80211_policy,
11155         },
11156         {
11157                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11158                 .doit = nl80211_update_ft_ies,
11159                 .policy = nl80211_policy,
11160                 .flags = GENL_ADMIN_PERM,
11161                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11162                                   NL80211_FLAG_NEED_RTNL,
11163         },
11164         {
11165                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11166                 .doit = nl80211_crit_protocol_start,
11167                 .policy = nl80211_policy,
11168                 .flags = GENL_ADMIN_PERM,
11169                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11170                                   NL80211_FLAG_NEED_RTNL,
11171         },
11172         {
11173                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11174                 .doit = nl80211_crit_protocol_stop,
11175                 .policy = nl80211_policy,
11176                 .flags = GENL_ADMIN_PERM,
11177                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11178                                   NL80211_FLAG_NEED_RTNL,
11179         },
11180         {
11181                 .cmd = NL80211_CMD_GET_COALESCE,
11182                 .doit = nl80211_get_coalesce,
11183                 .policy = nl80211_policy,
11184                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11185                                   NL80211_FLAG_NEED_RTNL,
11186         },
11187         {
11188                 .cmd = NL80211_CMD_SET_COALESCE,
11189                 .doit = nl80211_set_coalesce,
11190                 .policy = nl80211_policy,
11191                 .flags = GENL_ADMIN_PERM,
11192                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11193                                   NL80211_FLAG_NEED_RTNL,
11194         },
11195         {
11196                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11197                 .doit = nl80211_channel_switch,
11198                 .policy = nl80211_policy,
11199                 .flags = GENL_ADMIN_PERM,
11200                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11201                                   NL80211_FLAG_NEED_RTNL,
11202         },
11203         {
11204                 .cmd = NL80211_CMD_VENDOR,
11205                 .doit = nl80211_vendor_cmd,
11206                 .dumpit = nl80211_vendor_cmd_dump,
11207                 .policy = nl80211_policy,
11208                 .flags = GENL_ADMIN_PERM,
11209                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11210                                   NL80211_FLAG_NEED_RTNL,
11211         },
11212         {
11213                 .cmd = NL80211_CMD_SET_QOS_MAP,
11214                 .doit = nl80211_set_qos_map,
11215                 .policy = nl80211_policy,
11216                 .flags = GENL_ADMIN_PERM,
11217                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11218                                   NL80211_FLAG_NEED_RTNL,
11219         },
11220         {
11221                 .cmd = NL80211_CMD_ADD_TX_TS,
11222                 .doit = nl80211_add_tx_ts,
11223                 .policy = nl80211_policy,
11224                 .flags = GENL_ADMIN_PERM,
11225                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11226                                   NL80211_FLAG_NEED_RTNL,
11227         },
11228         {
11229                 .cmd = NL80211_CMD_DEL_TX_TS,
11230                 .doit = nl80211_del_tx_ts,
11231                 .policy = nl80211_policy,
11232                 .flags = GENL_ADMIN_PERM,
11233                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11234                                   NL80211_FLAG_NEED_RTNL,
11235         },
11236         {
11237                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11238                 .doit = nl80211_tdls_channel_switch,
11239                 .policy = nl80211_policy,
11240                 .flags = GENL_ADMIN_PERM,
11241                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11242                                   NL80211_FLAG_NEED_RTNL,
11243         },
11244         {
11245                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11246                 .doit = nl80211_tdls_cancel_channel_switch,
11247                 .policy = nl80211_policy,
11248                 .flags = GENL_ADMIN_PERM,
11249                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11250                                   NL80211_FLAG_NEED_RTNL,
11251         },
11252 };
11253
11254 /* notification functions */
11255
11256 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11257                           enum nl80211_commands cmd)
11258 {
11259         struct sk_buff *msg;
11260         struct nl80211_dump_wiphy_state state = {};
11261
11262         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11263                 cmd != NL80211_CMD_DEL_WIPHY);
11264
11265         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11266         if (!msg)
11267                 return;
11268
11269         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11270                 nlmsg_free(msg);
11271                 return;
11272         }
11273
11274         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11275                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11276 }
11277
11278 static int nl80211_add_scan_req(struct sk_buff *msg,
11279                                 struct cfg80211_registered_device *rdev)
11280 {
11281         struct cfg80211_scan_request *req = rdev->scan_req;
11282         struct nlattr *nest;
11283         int i;
11284
11285         if (WARN_ON(!req))
11286                 return 0;
11287
11288         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11289         if (!nest)
11290                 goto nla_put_failure;
11291         for (i = 0; i < req->n_ssids; i++) {
11292                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11293                         goto nla_put_failure;
11294         }
11295         nla_nest_end(msg, nest);
11296
11297         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11298         if (!nest)
11299                 goto nla_put_failure;
11300         for (i = 0; i < req->n_channels; i++) {
11301                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11302                         goto nla_put_failure;
11303         }
11304         nla_nest_end(msg, nest);
11305
11306         if (req->ie &&
11307             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11308                 goto nla_put_failure;
11309
11310         if (req->flags &&
11311             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11312                 goto nla_put_failure;
11313
11314         return 0;
11315  nla_put_failure:
11316         return -ENOBUFS;
11317 }
11318
11319 static int nl80211_send_scan_msg(struct sk_buff *msg,
11320                                  struct cfg80211_registered_device *rdev,
11321                                  struct wireless_dev *wdev,
11322                                  u32 portid, u32 seq, int flags,
11323                                  u32 cmd)
11324 {
11325         void *hdr;
11326
11327         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11328         if (!hdr)
11329                 return -1;
11330
11331         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11332             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11333                                          wdev->netdev->ifindex)) ||
11334             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11335                 goto nla_put_failure;
11336
11337         /* ignore errors and send incomplete event anyway */
11338         nl80211_add_scan_req(msg, rdev);
11339
11340         genlmsg_end(msg, hdr);
11341         return 0;
11342
11343  nla_put_failure:
11344         genlmsg_cancel(msg, hdr);
11345         return -EMSGSIZE;
11346 }
11347
11348 static int
11349 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11350                             struct cfg80211_registered_device *rdev,
11351                             struct net_device *netdev,
11352                             u32 portid, u32 seq, int flags, u32 cmd)
11353 {
11354         void *hdr;
11355
11356         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11357         if (!hdr)
11358                 return -1;
11359
11360         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11361             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11362                 goto nla_put_failure;
11363
11364         genlmsg_end(msg, hdr);
11365         return 0;
11366
11367  nla_put_failure:
11368         genlmsg_cancel(msg, hdr);
11369         return -EMSGSIZE;
11370 }
11371
11372 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11373                              struct wireless_dev *wdev)
11374 {
11375         struct sk_buff *msg;
11376
11377         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11378         if (!msg)
11379                 return;
11380
11381         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11382                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11383                 nlmsg_free(msg);
11384                 return;
11385         }
11386
11387         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11388                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11389 }
11390
11391 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11392                                        struct wireless_dev *wdev, bool aborted)
11393 {
11394         struct sk_buff *msg;
11395
11396         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11397         if (!msg)
11398                 return NULL;
11399
11400         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11401                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11402                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11403                 nlmsg_free(msg);
11404                 return NULL;
11405         }
11406
11407         return msg;
11408 }
11409
11410 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11411                               struct sk_buff *msg)
11412 {
11413         if (!msg)
11414                 return;
11415
11416         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11417                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11418 }
11419
11420 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11421                                      struct net_device *netdev)
11422 {
11423         struct sk_buff *msg;
11424
11425         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11426         if (!msg)
11427                 return;
11428
11429         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11430                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11431                 nlmsg_free(msg);
11432                 return;
11433         }
11434
11435         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11436                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11437 }
11438
11439 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11440                              struct net_device *netdev, u32 cmd)
11441 {
11442         struct sk_buff *msg;
11443
11444         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11445         if (!msg)
11446                 return;
11447
11448         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11449                 nlmsg_free(msg);
11450                 return;
11451         }
11452
11453         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11454                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11455 }
11456
11457 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11458                                           struct regulatory_request *request)
11459 {
11460         /* Userspace can always count this one always being set */
11461         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11462                 goto nla_put_failure;
11463
11464         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11465                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11466                                NL80211_REGDOM_TYPE_WORLD))
11467                         goto nla_put_failure;
11468         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11469                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11470                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11471                         goto nla_put_failure;
11472         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11473                    request->intersect) {
11474                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11475                                NL80211_REGDOM_TYPE_INTERSECTION))
11476                         goto nla_put_failure;
11477         } else {
11478                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11479                                NL80211_REGDOM_TYPE_COUNTRY) ||
11480                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11481                                    request->alpha2))
11482                         goto nla_put_failure;
11483         }
11484
11485         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11486                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11487
11488                 if (wiphy &&
11489                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11490                         goto nla_put_failure;
11491
11492                 if (wiphy &&
11493                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11494                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11495                         goto nla_put_failure;
11496         }
11497
11498         return true;
11499
11500 nla_put_failure:
11501         return false;
11502 }
11503
11504 /*
11505  * This can happen on global regulatory changes or device specific settings
11506  * based on custom regulatory domains.
11507  */
11508 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11509                                      struct regulatory_request *request)
11510 {
11511         struct sk_buff *msg;
11512         void *hdr;
11513
11514         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11515         if (!msg)
11516                 return;
11517
11518         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11519         if (!hdr) {
11520                 nlmsg_free(msg);
11521                 return;
11522         }
11523
11524         if (nl80211_reg_change_event_fill(msg, request) == false)
11525                 goto nla_put_failure;
11526
11527         genlmsg_end(msg, hdr);
11528
11529         rcu_read_lock();
11530         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11531                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11532         rcu_read_unlock();
11533
11534         return;
11535
11536 nla_put_failure:
11537         genlmsg_cancel(msg, hdr);
11538         nlmsg_free(msg);
11539 }
11540
11541 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11542                                     struct net_device *netdev,
11543                                     const u8 *buf, size_t len,
11544                                     enum nl80211_commands cmd, gfp_t gfp,
11545                                     int uapsd_queues)
11546 {
11547         struct sk_buff *msg;
11548         void *hdr;
11549
11550         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11551         if (!msg)
11552                 return;
11553
11554         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11555         if (!hdr) {
11556                 nlmsg_free(msg);
11557                 return;
11558         }
11559
11560         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11561             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11562             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11563                 goto nla_put_failure;
11564
11565         if (uapsd_queues >= 0) {
11566                 struct nlattr *nla_wmm =
11567                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11568                 if (!nla_wmm)
11569                         goto nla_put_failure;
11570
11571                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11572                                uapsd_queues))
11573                         goto nla_put_failure;
11574
11575                 nla_nest_end(msg, nla_wmm);
11576         }
11577
11578         genlmsg_end(msg, hdr);
11579
11580         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11581                                 NL80211_MCGRP_MLME, gfp);
11582         return;
11583
11584  nla_put_failure:
11585         genlmsg_cancel(msg, hdr);
11586         nlmsg_free(msg);
11587 }
11588
11589 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11590                           struct net_device *netdev, const u8 *buf,
11591                           size_t len, gfp_t gfp)
11592 {
11593         nl80211_send_mlme_event(rdev, netdev, buf, len,
11594                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11595 }
11596
11597 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11598                            struct net_device *netdev, const u8 *buf,
11599                            size_t len, gfp_t gfp, int uapsd_queues)
11600 {
11601         nl80211_send_mlme_event(rdev, netdev, buf, len,
11602                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11603 }
11604
11605 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11606                          struct net_device *netdev, const u8 *buf,
11607                          size_t len, gfp_t gfp)
11608 {
11609         nl80211_send_mlme_event(rdev, netdev, buf, len,
11610                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11611 }
11612
11613 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11614                            struct net_device *netdev, const u8 *buf,
11615                            size_t len, gfp_t gfp)
11616 {
11617         nl80211_send_mlme_event(rdev, netdev, buf, len,
11618                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11619 }
11620
11621 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11622                                   size_t len)
11623 {
11624         struct wireless_dev *wdev = dev->ieee80211_ptr;
11625         struct wiphy *wiphy = wdev->wiphy;
11626         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11627         const struct ieee80211_mgmt *mgmt = (void *)buf;
11628         u32 cmd;
11629
11630         if (WARN_ON(len < 2))
11631                 return;
11632
11633         if (ieee80211_is_deauth(mgmt->frame_control))
11634                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11635         else
11636                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11637
11638         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11639         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11640 }
11641 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11642
11643 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11644                                       struct net_device *netdev, int cmd,
11645                                       const u8 *addr, gfp_t gfp)
11646 {
11647         struct sk_buff *msg;
11648         void *hdr;
11649
11650         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11651         if (!msg)
11652                 return;
11653
11654         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11655         if (!hdr) {
11656                 nlmsg_free(msg);
11657                 return;
11658         }
11659
11660         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11661             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11662             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
11663             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11664                 goto nla_put_failure;
11665
11666         genlmsg_end(msg, hdr);
11667
11668         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11669                                 NL80211_MCGRP_MLME, gfp);
11670         return;
11671
11672  nla_put_failure:
11673         genlmsg_cancel(msg, hdr);
11674         nlmsg_free(msg);
11675 }
11676
11677 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
11678                                struct net_device *netdev, const u8 *addr,
11679                                gfp_t gfp)
11680 {
11681         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
11682                                   addr, gfp);
11683 }
11684
11685 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
11686                                 struct net_device *netdev, const u8 *addr,
11687                                 gfp_t gfp)
11688 {
11689         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
11690                                   addr, gfp);
11691 }
11692
11693 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
11694                                  struct net_device *netdev, const u8 *bssid,
11695                                  const u8 *req_ie, size_t req_ie_len,
11696                                  const u8 *resp_ie, size_t resp_ie_len,
11697                                  u16 status, gfp_t gfp)
11698 {
11699         struct sk_buff *msg;
11700         void *hdr;
11701
11702         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11703         if (!msg)
11704                 return;
11705
11706         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
11707         if (!hdr) {
11708                 nlmsg_free(msg);
11709                 return;
11710         }
11711
11712         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11713             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11714             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
11715             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
11716             (req_ie &&
11717              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11718             (resp_ie &&
11719              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11720                 goto nla_put_failure;
11721
11722         genlmsg_end(msg, hdr);
11723
11724         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11725                                 NL80211_MCGRP_MLME, gfp);
11726         return;
11727
11728  nla_put_failure:
11729         genlmsg_cancel(msg, hdr);
11730         nlmsg_free(msg);
11731
11732 }
11733
11734 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
11735                          struct net_device *netdev, const u8 *bssid,
11736                          const u8 *req_ie, size_t req_ie_len,
11737                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
11738 {
11739         struct sk_buff *msg;
11740         void *hdr;
11741
11742         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11743         if (!msg)
11744                 return;
11745
11746         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
11747         if (!hdr) {
11748                 nlmsg_free(msg);
11749                 return;
11750         }
11751
11752         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11753             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11754             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
11755             (req_ie &&
11756              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11757             (resp_ie &&
11758              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11759                 goto nla_put_failure;
11760
11761         genlmsg_end(msg, hdr);
11762
11763         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11764                                 NL80211_MCGRP_MLME, gfp);
11765         return;
11766
11767  nla_put_failure:
11768         genlmsg_cancel(msg, hdr);
11769         nlmsg_free(msg);
11770
11771 }
11772
11773 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
11774                                struct net_device *netdev, u16 reason,
11775                                const u8 *ie, size_t ie_len, bool from_ap)
11776 {
11777         struct sk_buff *msg;
11778         void *hdr;
11779
11780         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11781         if (!msg)
11782                 return;
11783
11784         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
11785         if (!hdr) {
11786                 nlmsg_free(msg);
11787                 return;
11788         }
11789
11790         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11791             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11792             (from_ap && reason &&
11793              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
11794             (from_ap &&
11795              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
11796             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
11797                 goto nla_put_failure;
11798
11799         genlmsg_end(msg, hdr);
11800
11801         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11802                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11803         return;
11804
11805  nla_put_failure:
11806         genlmsg_cancel(msg, hdr);
11807         nlmsg_free(msg);
11808
11809 }
11810
11811 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
11812                              struct net_device *netdev, const u8 *bssid,
11813                              gfp_t gfp)
11814 {
11815         struct sk_buff *msg;
11816         void *hdr;
11817
11818         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11819         if (!msg)
11820                 return;
11821
11822         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
11823         if (!hdr) {
11824                 nlmsg_free(msg);
11825                 return;
11826         }
11827
11828         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11829             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11830             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11831                 goto nla_put_failure;
11832
11833         genlmsg_end(msg, hdr);
11834
11835         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11836                                 NL80211_MCGRP_MLME, gfp);
11837         return;
11838
11839  nla_put_failure:
11840         genlmsg_cancel(msg, hdr);
11841         nlmsg_free(msg);
11842 }
11843
11844 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
11845                                         const u8* ie, u8 ie_len, gfp_t gfp)
11846 {
11847         struct wireless_dev *wdev = dev->ieee80211_ptr;
11848         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11849         struct sk_buff *msg;
11850         void *hdr;
11851
11852         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
11853                 return;
11854
11855         trace_cfg80211_notify_new_peer_candidate(dev, addr);
11856
11857         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11858         if (!msg)
11859                 return;
11860
11861         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
11862         if (!hdr) {
11863                 nlmsg_free(msg);
11864                 return;
11865         }
11866
11867         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11868             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11869             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11870             (ie_len && ie &&
11871              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
11872                 goto nla_put_failure;
11873
11874         genlmsg_end(msg, hdr);
11875
11876         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11877                                 NL80211_MCGRP_MLME, gfp);
11878         return;
11879
11880  nla_put_failure:
11881         genlmsg_cancel(msg, hdr);
11882         nlmsg_free(msg);
11883 }
11884 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
11885
11886 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
11887                                  struct net_device *netdev, const u8 *addr,
11888                                  enum nl80211_key_type key_type, int key_id,
11889                                  const u8 *tsc, gfp_t gfp)
11890 {
11891         struct sk_buff *msg;
11892         void *hdr;
11893
11894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11895         if (!msg)
11896                 return;
11897
11898         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
11899         if (!hdr) {
11900                 nlmsg_free(msg);
11901                 return;
11902         }
11903
11904         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11905             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11906             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
11907             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
11908             (key_id != -1 &&
11909              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
11910             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
11911                 goto nla_put_failure;
11912
11913         genlmsg_end(msg, hdr);
11914
11915         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11916                                 NL80211_MCGRP_MLME, gfp);
11917         return;
11918
11919  nla_put_failure:
11920         genlmsg_cancel(msg, hdr);
11921         nlmsg_free(msg);
11922 }
11923
11924 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
11925                                     struct ieee80211_channel *channel_before,
11926                                     struct ieee80211_channel *channel_after)
11927 {
11928         struct sk_buff *msg;
11929         void *hdr;
11930         struct nlattr *nl_freq;
11931
11932         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
11933         if (!msg)
11934                 return;
11935
11936         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
11937         if (!hdr) {
11938                 nlmsg_free(msg);
11939                 return;
11940         }
11941
11942         /*
11943          * Since we are applying the beacon hint to a wiphy we know its
11944          * wiphy_idx is valid
11945          */
11946         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
11947                 goto nla_put_failure;
11948
11949         /* Before */
11950         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
11951         if (!nl_freq)
11952                 goto nla_put_failure;
11953         if (nl80211_msg_put_channel(msg, channel_before, false))
11954                 goto nla_put_failure;
11955         nla_nest_end(msg, nl_freq);
11956
11957         /* After */
11958         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
11959         if (!nl_freq)
11960                 goto nla_put_failure;
11961         if (nl80211_msg_put_channel(msg, channel_after, false))
11962                 goto nla_put_failure;
11963         nla_nest_end(msg, nl_freq);
11964
11965         genlmsg_end(msg, hdr);
11966
11967         rcu_read_lock();
11968         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11969                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11970         rcu_read_unlock();
11971
11972         return;
11973
11974 nla_put_failure:
11975         genlmsg_cancel(msg, hdr);
11976         nlmsg_free(msg);
11977 }
11978
11979 static void nl80211_send_remain_on_chan_event(
11980         int cmd, struct cfg80211_registered_device *rdev,
11981         struct wireless_dev *wdev, u64 cookie,
11982         struct ieee80211_channel *chan,
11983         unsigned int duration, gfp_t gfp)
11984 {
11985         struct sk_buff *msg;
11986         void *hdr;
11987
11988         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11989         if (!msg)
11990                 return;
11991
11992         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11993         if (!hdr) {
11994                 nlmsg_free(msg);
11995                 return;
11996         }
11997
11998         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11999             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12000                                          wdev->netdev->ifindex)) ||
12001             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12002             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12003             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12004                         NL80211_CHAN_NO_HT) ||
12005             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
12006                 goto nla_put_failure;
12007
12008         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12009             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12010                 goto nla_put_failure;
12011
12012         genlmsg_end(msg, hdr);
12013
12014         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12015                                 NL80211_MCGRP_MLME, gfp);
12016         return;
12017
12018  nla_put_failure:
12019         genlmsg_cancel(msg, hdr);
12020         nlmsg_free(msg);
12021 }
12022
12023 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12024                                struct ieee80211_channel *chan,
12025                                unsigned int duration, gfp_t gfp)
12026 {
12027         struct wiphy *wiphy = wdev->wiphy;
12028         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12029
12030         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12031         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12032                                           rdev, wdev, cookie, chan,
12033                                           duration, gfp);
12034 }
12035 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12036
12037 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12038                                         struct ieee80211_channel *chan,
12039                                         gfp_t gfp)
12040 {
12041         struct wiphy *wiphy = wdev->wiphy;
12042         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12043
12044         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12045         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12046                                           rdev, wdev, cookie, chan, 0, gfp);
12047 }
12048 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12049
12050 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12051                       struct station_info *sinfo, gfp_t gfp)
12052 {
12053         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12054         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12055         struct sk_buff *msg;
12056
12057         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12058
12059         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12060         if (!msg)
12061                 return;
12062
12063         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12064                                  rdev, dev, mac_addr, sinfo) < 0) {
12065                 nlmsg_free(msg);
12066                 return;
12067         }
12068
12069         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12070                                 NL80211_MCGRP_MLME, gfp);
12071 }
12072 EXPORT_SYMBOL(cfg80211_new_sta);
12073
12074 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12075                             struct station_info *sinfo, gfp_t gfp)
12076 {
12077         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12078         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12079         struct sk_buff *msg;
12080         struct station_info empty_sinfo = {};
12081
12082         if (!sinfo)
12083                 sinfo = &empty_sinfo;
12084
12085         trace_cfg80211_del_sta(dev, mac_addr);
12086
12087         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12088         if (!msg)
12089                 return;
12090
12091         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12092                                  rdev, dev, mac_addr, sinfo) < 0) {
12093                 nlmsg_free(msg);
12094                 return;
12095         }
12096
12097         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12098                                 NL80211_MCGRP_MLME, gfp);
12099 }
12100 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12101
12102 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12103                           enum nl80211_connect_failed_reason reason,
12104                           gfp_t gfp)
12105 {
12106         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12107         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12108         struct sk_buff *msg;
12109         void *hdr;
12110
12111         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12112         if (!msg)
12113                 return;
12114
12115         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12116         if (!hdr) {
12117                 nlmsg_free(msg);
12118                 return;
12119         }
12120
12121         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12122             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12123             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12124                 goto nla_put_failure;
12125
12126         genlmsg_end(msg, hdr);
12127
12128         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12129                                 NL80211_MCGRP_MLME, gfp);
12130         return;
12131
12132  nla_put_failure:
12133         genlmsg_cancel(msg, hdr);
12134         nlmsg_free(msg);
12135 }
12136 EXPORT_SYMBOL(cfg80211_conn_failed);
12137
12138 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12139                                        const u8 *addr, gfp_t gfp)
12140 {
12141         struct wireless_dev *wdev = dev->ieee80211_ptr;
12142         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12143         struct sk_buff *msg;
12144         void *hdr;
12145         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12146
12147         if (!nlportid)
12148                 return false;
12149
12150         msg = nlmsg_new(100, gfp);
12151         if (!msg)
12152                 return true;
12153
12154         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12155         if (!hdr) {
12156                 nlmsg_free(msg);
12157                 return true;
12158         }
12159
12160         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12161             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12162             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12163                 goto nla_put_failure;
12164
12165         genlmsg_end(msg, hdr);
12166         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12167         return true;
12168
12169  nla_put_failure:
12170         genlmsg_cancel(msg, hdr);
12171         nlmsg_free(msg);
12172         return true;
12173 }
12174
12175 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12176                                 const u8 *addr, gfp_t gfp)
12177 {
12178         struct wireless_dev *wdev = dev->ieee80211_ptr;
12179         bool ret;
12180
12181         trace_cfg80211_rx_spurious_frame(dev, addr);
12182
12183         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12184                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12185                 trace_cfg80211_return_bool(false);
12186                 return false;
12187         }
12188         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12189                                          addr, gfp);
12190         trace_cfg80211_return_bool(ret);
12191         return ret;
12192 }
12193 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12194
12195 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12196                                         const u8 *addr, gfp_t gfp)
12197 {
12198         struct wireless_dev *wdev = dev->ieee80211_ptr;
12199         bool ret;
12200
12201         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12202
12203         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12204                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12205                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12206                 trace_cfg80211_return_bool(false);
12207                 return false;
12208         }
12209         ret = __nl80211_unexpected_frame(dev,
12210                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12211                                          addr, gfp);
12212         trace_cfg80211_return_bool(ret);
12213         return ret;
12214 }
12215 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12216
12217 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12218                       struct wireless_dev *wdev, u32 nlportid,
12219                       int freq, int sig_dbm,
12220                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12221 {
12222         struct net_device *netdev = wdev->netdev;
12223         struct sk_buff *msg;
12224         void *hdr;
12225
12226         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12227         if (!msg)
12228                 return -ENOMEM;
12229
12230         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12231         if (!hdr) {
12232                 nlmsg_free(msg);
12233                 return -ENOMEM;
12234         }
12235
12236         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12237             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12238                                         netdev->ifindex)) ||
12239             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12240             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12241             (sig_dbm &&
12242              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12243             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12244             (flags &&
12245              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12246                 goto nla_put_failure;
12247
12248         genlmsg_end(msg, hdr);
12249
12250         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12251
12252  nla_put_failure:
12253         genlmsg_cancel(msg, hdr);
12254         nlmsg_free(msg);
12255         return -ENOBUFS;
12256 }
12257
12258 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12259                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12260 {
12261         struct wiphy *wiphy = wdev->wiphy;
12262         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12263         struct net_device *netdev = wdev->netdev;
12264         struct sk_buff *msg;
12265         void *hdr;
12266
12267         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12268
12269         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12270         if (!msg)
12271                 return;
12272
12273         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12274         if (!hdr) {
12275                 nlmsg_free(msg);
12276                 return;
12277         }
12278
12279         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12280             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12281                                    netdev->ifindex)) ||
12282             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12283             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12284             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12285             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12286                 goto nla_put_failure;
12287
12288         genlmsg_end(msg, hdr);
12289
12290         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12291                                 NL80211_MCGRP_MLME, gfp);
12292         return;
12293
12294  nla_put_failure:
12295         genlmsg_cancel(msg, hdr);
12296         nlmsg_free(msg);
12297 }
12298 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12299
12300 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12301                                             const char *mac, gfp_t gfp)
12302 {
12303         struct wireless_dev *wdev = dev->ieee80211_ptr;
12304         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12305         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12306         void **cb;
12307
12308         if (!msg)
12309                 return NULL;
12310
12311         cb = (void **)msg->cb;
12312
12313         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12314         if (!cb[0]) {
12315                 nlmsg_free(msg);
12316                 return NULL;
12317         }
12318
12319         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12320             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12321                 goto nla_put_failure;
12322
12323         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12324                 goto nla_put_failure;
12325
12326         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12327         if (!cb[1])
12328                 goto nla_put_failure;
12329
12330         cb[2] = rdev;
12331
12332         return msg;
12333  nla_put_failure:
12334         nlmsg_free(msg);
12335         return NULL;
12336 }
12337
12338 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12339 {
12340         void **cb = (void **)msg->cb;
12341         struct cfg80211_registered_device *rdev = cb[2];
12342
12343         nla_nest_end(msg, cb[1]);
12344         genlmsg_end(msg, cb[0]);
12345
12346         memset(msg->cb, 0, sizeof(msg->cb));
12347
12348         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12349                                 NL80211_MCGRP_MLME, gfp);
12350 }
12351
12352 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12353                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12354                               gfp_t gfp)
12355 {
12356         struct sk_buff *msg;
12357
12358         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12359
12360         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12361                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12362                 return;
12363
12364         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12365         if (!msg)
12366                 return;
12367
12368         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12369                         rssi_event))
12370                 goto nla_put_failure;
12371
12372         cfg80211_send_cqm(msg, gfp);
12373
12374         return;
12375
12376  nla_put_failure:
12377         nlmsg_free(msg);
12378 }
12379 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12380
12381 void cfg80211_cqm_txe_notify(struct net_device *dev,
12382                              const u8 *peer, u32 num_packets,
12383                              u32 rate, u32 intvl, gfp_t gfp)
12384 {
12385         struct sk_buff *msg;
12386
12387         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12388         if (!msg)
12389                 return;
12390
12391         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12392                 goto nla_put_failure;
12393
12394         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12395                 goto nla_put_failure;
12396
12397         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12398                 goto nla_put_failure;
12399
12400         cfg80211_send_cqm(msg, gfp);
12401         return;
12402
12403  nla_put_failure:
12404         nlmsg_free(msg);
12405 }
12406 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12407
12408 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12409                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12410 {
12411         struct sk_buff *msg;
12412
12413         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12414
12415         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12416         if (!msg)
12417                 return;
12418
12419         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12420                 goto nla_put_failure;
12421
12422         cfg80211_send_cqm(msg, gfp);
12423         return;
12424
12425  nla_put_failure:
12426         nlmsg_free(msg);
12427 }
12428 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12429
12430 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12431 {
12432         struct sk_buff *msg;
12433
12434         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12435         if (!msg)
12436                 return;
12437
12438         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12439                 goto nla_put_failure;
12440
12441         cfg80211_send_cqm(msg, gfp);
12442         return;
12443
12444  nla_put_failure:
12445         nlmsg_free(msg);
12446 }
12447 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12448
12449 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12450                                      struct net_device *netdev, const u8 *bssid,
12451                                      const u8 *replay_ctr, gfp_t gfp)
12452 {
12453         struct sk_buff *msg;
12454         struct nlattr *rekey_attr;
12455         void *hdr;
12456
12457         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12458         if (!msg)
12459                 return;
12460
12461         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12462         if (!hdr) {
12463                 nlmsg_free(msg);
12464                 return;
12465         }
12466
12467         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12468             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12469             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12470                 goto nla_put_failure;
12471
12472         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12473         if (!rekey_attr)
12474                 goto nla_put_failure;
12475
12476         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12477                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12478                 goto nla_put_failure;
12479
12480         nla_nest_end(msg, rekey_attr);
12481
12482         genlmsg_end(msg, hdr);
12483
12484         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12485                                 NL80211_MCGRP_MLME, gfp);
12486         return;
12487
12488  nla_put_failure:
12489         genlmsg_cancel(msg, hdr);
12490         nlmsg_free(msg);
12491 }
12492
12493 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12494                                const u8 *replay_ctr, gfp_t gfp)
12495 {
12496         struct wireless_dev *wdev = dev->ieee80211_ptr;
12497         struct wiphy *wiphy = wdev->wiphy;
12498         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12499
12500         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12501         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12502 }
12503 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12504
12505 static void
12506 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12507                                struct net_device *netdev, int index,
12508                                const u8 *bssid, bool preauth, gfp_t gfp)
12509 {
12510         struct sk_buff *msg;
12511         struct nlattr *attr;
12512         void *hdr;
12513
12514         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12515         if (!msg)
12516                 return;
12517
12518         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12519         if (!hdr) {
12520                 nlmsg_free(msg);
12521                 return;
12522         }
12523
12524         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12525             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12526                 goto nla_put_failure;
12527
12528         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12529         if (!attr)
12530                 goto nla_put_failure;
12531
12532         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12533             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12534             (preauth &&
12535              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12536                 goto nla_put_failure;
12537
12538         nla_nest_end(msg, attr);
12539
12540         genlmsg_end(msg, hdr);
12541
12542         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12543                                 NL80211_MCGRP_MLME, gfp);
12544         return;
12545
12546  nla_put_failure:
12547         genlmsg_cancel(msg, hdr);
12548         nlmsg_free(msg);
12549 }
12550
12551 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12552                                      const u8 *bssid, bool preauth, gfp_t gfp)
12553 {
12554         struct wireless_dev *wdev = dev->ieee80211_ptr;
12555         struct wiphy *wiphy = wdev->wiphy;
12556         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12557
12558         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12559         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12560 }
12561 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12562
12563 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12564                                      struct net_device *netdev,
12565                                      struct cfg80211_chan_def *chandef,
12566                                      gfp_t gfp,
12567                                      enum nl80211_commands notif,
12568                                      u8 count)
12569 {
12570         struct sk_buff *msg;
12571         void *hdr;
12572
12573         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12574         if (!msg)
12575                 return;
12576
12577         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12578         if (!hdr) {
12579                 nlmsg_free(msg);
12580                 return;
12581         }
12582
12583         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12584                 goto nla_put_failure;
12585
12586         if (nl80211_send_chandef(msg, chandef))
12587                 goto nla_put_failure;
12588
12589         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12590             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12591                         goto nla_put_failure;
12592
12593         genlmsg_end(msg, hdr);
12594
12595         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12596                                 NL80211_MCGRP_MLME, gfp);
12597         return;
12598
12599  nla_put_failure:
12600         genlmsg_cancel(msg, hdr);
12601         nlmsg_free(msg);
12602 }
12603
12604 void cfg80211_ch_switch_notify(struct net_device *dev,
12605                                struct cfg80211_chan_def *chandef)
12606 {
12607         struct wireless_dev *wdev = dev->ieee80211_ptr;
12608         struct wiphy *wiphy = wdev->wiphy;
12609         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12610
12611         ASSERT_WDEV_LOCK(wdev);
12612
12613         trace_cfg80211_ch_switch_notify(dev, chandef);
12614
12615         wdev->chandef = *chandef;
12616         wdev->preset_chandef = *chandef;
12617         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12618                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12619 }
12620 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12621
12622 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12623                                        struct cfg80211_chan_def *chandef,
12624                                        u8 count)
12625 {
12626         struct wireless_dev *wdev = dev->ieee80211_ptr;
12627         struct wiphy *wiphy = wdev->wiphy;
12628         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12629
12630         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12631
12632         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12633                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12634 }
12635 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12636
12637 void
12638 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12639                      const struct cfg80211_chan_def *chandef,
12640                      enum nl80211_radar_event event,
12641                      struct net_device *netdev, gfp_t gfp)
12642 {
12643         struct sk_buff *msg;
12644         void *hdr;
12645
12646         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12647         if (!msg)
12648                 return;
12649
12650         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12651         if (!hdr) {
12652                 nlmsg_free(msg);
12653                 return;
12654         }
12655
12656         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12657                 goto nla_put_failure;
12658
12659         /* NOP and radar events don't need a netdev parameter */
12660         if (netdev) {
12661                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
12662
12663                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12664                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12665                         goto nla_put_failure;
12666         }
12667
12668         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
12669                 goto nla_put_failure;
12670
12671         if (nl80211_send_chandef(msg, chandef))
12672                 goto nla_put_failure;
12673
12674         genlmsg_end(msg, hdr);
12675
12676         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12677                                 NL80211_MCGRP_MLME, gfp);
12678         return;
12679
12680  nla_put_failure:
12681         genlmsg_cancel(msg, hdr);
12682         nlmsg_free(msg);
12683 }
12684
12685 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
12686                            u64 cookie, bool acked, gfp_t gfp)
12687 {
12688         struct wireless_dev *wdev = dev->ieee80211_ptr;
12689         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12690         struct sk_buff *msg;
12691         void *hdr;
12692
12693         trace_cfg80211_probe_status(dev, addr, cookie, acked);
12694
12695         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12696
12697         if (!msg)
12698                 return;
12699
12700         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
12701         if (!hdr) {
12702                 nlmsg_free(msg);
12703                 return;
12704         }
12705
12706         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12707             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12708             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12709             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12710             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
12711                 goto nla_put_failure;
12712
12713         genlmsg_end(msg, hdr);
12714
12715         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12716                                 NL80211_MCGRP_MLME, gfp);
12717         return;
12718
12719  nla_put_failure:
12720         genlmsg_cancel(msg, hdr);
12721         nlmsg_free(msg);
12722 }
12723 EXPORT_SYMBOL(cfg80211_probe_status);
12724
12725 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
12726                                  const u8 *frame, size_t len,
12727                                  int freq, int sig_dbm)
12728 {
12729         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12730         struct sk_buff *msg;
12731         void *hdr;
12732         struct cfg80211_beacon_registration *reg;
12733
12734         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
12735
12736         spin_lock_bh(&rdev->beacon_registrations_lock);
12737         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
12738                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
12739                 if (!msg) {
12740                         spin_unlock_bh(&rdev->beacon_registrations_lock);
12741                         return;
12742                 }
12743
12744                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12745                 if (!hdr)
12746                         goto nla_put_failure;
12747
12748                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12749                     (freq &&
12750                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
12751                     (sig_dbm &&
12752                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12753                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
12754                         goto nla_put_failure;
12755
12756                 genlmsg_end(msg, hdr);
12757
12758                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
12759         }
12760         spin_unlock_bh(&rdev->beacon_registrations_lock);
12761         return;
12762
12763  nla_put_failure:
12764         spin_unlock_bh(&rdev->beacon_registrations_lock);
12765         if (hdr)
12766                 genlmsg_cancel(msg, hdr);
12767         nlmsg_free(msg);
12768 }
12769 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
12770
12771 #ifdef CONFIG_PM
12772 static int cfg80211_net_detect_results(struct sk_buff *msg,
12773                                        struct cfg80211_wowlan_wakeup *wakeup)
12774 {
12775         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
12776         struct nlattr *nl_results, *nl_match, *nl_freqs;
12777         int i, j;
12778
12779         nl_results = nla_nest_start(
12780                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
12781         if (!nl_results)
12782                 return -EMSGSIZE;
12783
12784         for (i = 0; i < nd->n_matches; i++) {
12785                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
12786
12787                 nl_match = nla_nest_start(msg, i);
12788                 if (!nl_match)
12789                         break;
12790
12791                 /* The SSID attribute is optional in nl80211, but for
12792                  * simplicity reasons it's always present in the
12793                  * cfg80211 structure.  If a driver can't pass the
12794                  * SSID, that needs to be changed.  A zero length SSID
12795                  * is still a valid SSID (wildcard), so it cannot be
12796                  * used for this purpose.
12797                  */
12798                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
12799                             match->ssid.ssid)) {
12800                         nla_nest_cancel(msg, nl_match);
12801                         goto out;
12802                 }
12803
12804                 if (match->n_channels) {
12805                         nl_freqs = nla_nest_start(
12806                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
12807                         if (!nl_freqs) {
12808                                 nla_nest_cancel(msg, nl_match);
12809                                 goto out;
12810                         }
12811
12812                         for (j = 0; j < match->n_channels; j++) {
12813                                 if (nla_put_u32(msg, j, match->channels[j])) {
12814                                         nla_nest_cancel(msg, nl_freqs);
12815                                         nla_nest_cancel(msg, nl_match);
12816                                         goto out;
12817                                 }
12818                         }
12819
12820                         nla_nest_end(msg, nl_freqs);
12821                 }
12822
12823                 nla_nest_end(msg, nl_match);
12824         }
12825
12826 out:
12827         nla_nest_end(msg, nl_results);
12828         return 0;
12829 }
12830
12831 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
12832                                    struct cfg80211_wowlan_wakeup *wakeup,
12833                                    gfp_t gfp)
12834 {
12835         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12836         struct sk_buff *msg;
12837         void *hdr;
12838         int size = 200;
12839
12840         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
12841
12842         if (wakeup)
12843                 size += wakeup->packet_present_len;
12844
12845         msg = nlmsg_new(size, gfp);
12846         if (!msg)
12847                 return;
12848
12849         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
12850         if (!hdr)
12851                 goto free_msg;
12852
12853         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12854             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12855                 goto free_msg;
12856
12857         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12858                                         wdev->netdev->ifindex))
12859                 goto free_msg;
12860
12861         if (wakeup) {
12862                 struct nlattr *reasons;
12863
12864                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
12865                 if (!reasons)
12866                         goto free_msg;
12867
12868                 if (wakeup->disconnect &&
12869                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
12870                         goto free_msg;
12871                 if (wakeup->magic_pkt &&
12872                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
12873                         goto free_msg;
12874                 if (wakeup->gtk_rekey_failure &&
12875                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
12876                         goto free_msg;
12877                 if (wakeup->eap_identity_req &&
12878                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
12879                         goto free_msg;
12880                 if (wakeup->four_way_handshake &&
12881                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
12882                         goto free_msg;
12883                 if (wakeup->rfkill_release &&
12884                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
12885                         goto free_msg;
12886
12887                 if (wakeup->pattern_idx >= 0 &&
12888                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
12889                                 wakeup->pattern_idx))
12890                         goto free_msg;
12891
12892                 if (wakeup->tcp_match &&
12893                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
12894                         goto free_msg;
12895
12896                 if (wakeup->tcp_connlost &&
12897                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
12898                         goto free_msg;
12899
12900                 if (wakeup->tcp_nomoretokens &&
12901                     nla_put_flag(msg,
12902                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
12903                         goto free_msg;
12904
12905                 if (wakeup->packet) {
12906                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
12907                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
12908
12909                         if (!wakeup->packet_80211) {
12910                                 pkt_attr =
12911                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
12912                                 len_attr =
12913                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
12914                         }
12915
12916                         if (wakeup->packet_len &&
12917                             nla_put_u32(msg, len_attr, wakeup->packet_len))
12918                                 goto free_msg;
12919
12920                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
12921                                     wakeup->packet))
12922                                 goto free_msg;
12923                 }
12924
12925                 if (wakeup->net_detect &&
12926                     cfg80211_net_detect_results(msg, wakeup))
12927                                 goto free_msg;
12928
12929                 nla_nest_end(msg, reasons);
12930         }
12931
12932         genlmsg_end(msg, hdr);
12933
12934         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12935                                 NL80211_MCGRP_MLME, gfp);
12936         return;
12937
12938  free_msg:
12939         nlmsg_free(msg);
12940 }
12941 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
12942 #endif
12943
12944 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
12945                                 enum nl80211_tdls_operation oper,
12946                                 u16 reason_code, gfp_t gfp)
12947 {
12948         struct wireless_dev *wdev = dev->ieee80211_ptr;
12949         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12950         struct sk_buff *msg;
12951         void *hdr;
12952
12953         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
12954                                          reason_code);
12955
12956         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12957         if (!msg)
12958                 return;
12959
12960         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
12961         if (!hdr) {
12962                 nlmsg_free(msg);
12963                 return;
12964         }
12965
12966         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12967             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12968             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
12969             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
12970             (reason_code > 0 &&
12971              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
12972                 goto nla_put_failure;
12973
12974         genlmsg_end(msg, hdr);
12975
12976         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12977                                 NL80211_MCGRP_MLME, gfp);
12978         return;
12979
12980  nla_put_failure:
12981         genlmsg_cancel(msg, hdr);
12982         nlmsg_free(msg);
12983 }
12984 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
12985
12986 static int nl80211_netlink_notify(struct notifier_block * nb,
12987                                   unsigned long state,
12988                                   void *_notify)
12989 {
12990         struct netlink_notify *notify = _notify;
12991         struct cfg80211_registered_device *rdev;
12992         struct wireless_dev *wdev;
12993         struct cfg80211_beacon_registration *reg, *tmp;
12994
12995         if (state != NETLINK_URELEASE)
12996                 return NOTIFY_DONE;
12997
12998         rcu_read_lock();
12999
13000         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13001                 bool schedule_destroy_work = false;
13002                 bool schedule_scan_stop = false;
13003                 struct cfg80211_sched_scan_request *sched_scan_req =
13004                         rcu_dereference(rdev->sched_scan_req);
13005
13006                 if (sched_scan_req && notify->portid &&
13007                     sched_scan_req->owner_nlportid == notify->portid)
13008                         schedule_scan_stop = true;
13009
13010                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13011                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13012
13013                         if (wdev->owner_nlportid == notify->portid)
13014                                 schedule_destroy_work = true;
13015                 }
13016
13017                 spin_lock_bh(&rdev->beacon_registrations_lock);
13018                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13019                                          list) {
13020                         if (reg->nlportid == notify->portid) {
13021                                 list_del(&reg->list);
13022                                 kfree(reg);
13023                                 break;
13024                         }
13025                 }
13026                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13027
13028                 if (schedule_destroy_work) {
13029                         struct cfg80211_iface_destroy *destroy;
13030
13031                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13032                         if (destroy) {
13033                                 destroy->nlportid = notify->portid;
13034                                 spin_lock(&rdev->destroy_list_lock);
13035                                 list_add(&destroy->list, &rdev->destroy_list);
13036                                 spin_unlock(&rdev->destroy_list_lock);
13037                                 schedule_work(&rdev->destroy_work);
13038                         }
13039                 } else if (schedule_scan_stop) {
13040                         sched_scan_req->owner_nlportid = 0;
13041
13042                         if (rdev->ops->sched_scan_stop &&
13043                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13044                                 schedule_work(&rdev->sched_scan_stop_wk);
13045                 }
13046         }
13047
13048         rcu_read_unlock();
13049
13050         /*
13051          * It is possible that the user space process that is controlling the
13052          * indoor setting disappeared, so notify the regulatory core.
13053          */
13054         regulatory_netlink_notify(notify->portid);
13055         return NOTIFY_OK;
13056 }
13057
13058 static struct notifier_block nl80211_netlink_notifier = {
13059         .notifier_call = nl80211_netlink_notify,
13060 };
13061
13062 void cfg80211_ft_event(struct net_device *netdev,
13063                        struct cfg80211_ft_event_params *ft_event)
13064 {
13065         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13066         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13067         struct sk_buff *msg;
13068         void *hdr;
13069
13070         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13071
13072         if (!ft_event->target_ap)
13073                 return;
13074
13075         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13076         if (!msg)
13077                 return;
13078
13079         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13080         if (!hdr)
13081                 goto out;
13082
13083         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13084             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13085             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13086                 goto out;
13087
13088         if (ft_event->ies &&
13089             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13090                 goto out;
13091         if (ft_event->ric_ies &&
13092             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13093                     ft_event->ric_ies))
13094                 goto out;
13095
13096         genlmsg_end(msg, hdr);
13097
13098         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13099                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13100         return;
13101  out:
13102         nlmsg_free(msg);
13103 }
13104 EXPORT_SYMBOL(cfg80211_ft_event);
13105
13106 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13107 {
13108         struct cfg80211_registered_device *rdev;
13109         struct sk_buff *msg;
13110         void *hdr;
13111         u32 nlportid;
13112
13113         rdev = wiphy_to_rdev(wdev->wiphy);
13114         if (!rdev->crit_proto_nlportid)
13115                 return;
13116
13117         nlportid = rdev->crit_proto_nlportid;
13118         rdev->crit_proto_nlportid = 0;
13119
13120         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13121         if (!msg)
13122                 return;
13123
13124         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13125         if (!hdr)
13126                 goto nla_put_failure;
13127
13128         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13129             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13130                 goto nla_put_failure;
13131
13132         genlmsg_end(msg, hdr);
13133
13134         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13135         return;
13136
13137  nla_put_failure:
13138         if (hdr)
13139                 genlmsg_cancel(msg, hdr);
13140         nlmsg_free(msg);
13141
13142 }
13143 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13144
13145 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13146 {
13147         struct wiphy *wiphy = wdev->wiphy;
13148         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13149         struct sk_buff *msg;
13150         void *hdr;
13151
13152         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13153         if (!msg)
13154                 return;
13155
13156         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13157         if (!hdr)
13158                 goto out;
13159
13160         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13161             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13162             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13163                 goto out;
13164
13165         genlmsg_end(msg, hdr);
13166
13167         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13168                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13169         return;
13170  out:
13171         nlmsg_free(msg);
13172 }
13173
13174 /* initialisation/exit functions */
13175
13176 int nl80211_init(void)
13177 {
13178         int err;
13179
13180         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13181                                                    nl80211_mcgrps);
13182         if (err)
13183                 return err;
13184
13185         err = netlink_register_notifier(&nl80211_netlink_notifier);
13186         if (err)
13187                 goto err_out;
13188
13189         return 0;
13190  err_out:
13191         genl_unregister_family(&nl80211_fam);
13192         return err;
13193 }
13194
13195 void nl80211_exit(void)
13196 {
13197         netlink_unregister_notifier(&nl80211_netlink_notifier);
13198         genl_unregister_family(&nl80211_fam);
13199 }