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  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  41         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  42         .hdrsize = 0,                   /* no private header */
  43         .version = 1,                   /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* multicast groups */
  51 enum nl80211_multicast_groups {
  52         NL80211_MCGRP_CONFIG,
  53         NL80211_MCGRP_SCAN,
  54         NL80211_MCGRP_REGULATORY,
  55         NL80211_MCGRP_MLME,
  56         NL80211_MCGRP_VENDOR,
  57         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  58 };
  59
  60 static const struct genl_multicast_group nl80211_mcgrps[] = {
  61         [NL80211_MCGRP_CONFIG] = { .name = "config", },
  62         [NL80211_MCGRP_SCAN] = { .name = "scan", },
  63         [NL80211_MCGRP_REGULATORY] = { .name = "regulatory", },
  64         [NL80211_MCGRP_MLME] = { .name = "mlme", },
  65         [NL80211_MCGRP_VENDOR] = { .name = "vendor", },
  66 #ifdef CONFIG_NL80211_TESTMODE
  67         [NL80211_MCGRP_TESTMODE] = { .name = "testmode", }
  68 #endif
  69 };
  70
  71 /* returns ERR_PTR values */
  72 static struct wireless_dev *
  73 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  74 {
  75         struct cfg80211_registered_device *rdev;
  76         struct wireless_dev *result = NULL;
  77         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  78         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  79         u64 wdev_id;
  80         int wiphy_idx = -1;
  81         int ifidx = -1;
  82
  83         ASSERT_RTNL();
  84
  85         if (!have_ifidx && !have_wdev_id)
  86                 return ERR_PTR(-EINVAL);
  87
  88         if (have_ifidx)
  89                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  90         if (have_wdev_id) {
  91                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  92                 wiphy_idx = wdev_id >> 32;
  93         }
  94
  95         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  96                 struct wireless_dev *wdev;
  97
  98                 if (wiphy_net(&rdev->wiphy) != netns)
  99                         continue;
 100
 101                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 102                         continue;
 103
 104                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 105                         if (have_ifidx && wdev->netdev &&
 106                             wdev->netdev->ifindex == ifidx) {
 107                                 result = wdev;
 108                                 break;
 109                         }
 110                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 111                                 result = wdev;
 112                                 break;
 113                         }
 114                 }
 115
 116                 if (result)
 117                         break;
 118         }
 119
 120         if (result)
 121                 return result;
 122         return ERR_PTR(-ENODEV);
 123 }
 124
 125 static struct cfg80211_registered_device *
 126 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 127 {
 128         struct cfg80211_registered_device *rdev = NULL, *tmp;
 129         struct net_device *netdev;
 130
 131         ASSERT_RTNL();
 132
 133         if (!attrs[NL80211_ATTR_WIPHY] &&
 134             !attrs[NL80211_ATTR_IFINDEX] &&
 135             !attrs[NL80211_ATTR_WDEV])
 136                 return ERR_PTR(-EINVAL);
 137
 138         if (attrs[NL80211_ATTR_WIPHY])
 139                 rdev = cfg80211_rdev_by_wiphy_idx(
 140                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 141
 142         if (attrs[NL80211_ATTR_WDEV]) {
 143                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 144                 struct wireless_dev *wdev;
 145                 bool found = false;
 146
 147                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 148                 if (tmp) {
 149                         /* make sure wdev exists */
 150                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 151                                 if (wdev->identifier != (u32)wdev_id)
 152                                         continue;
 153                                 found = true;
 154                                 break;
 155                         }
 156
 157                         if (!found)
 158                                 tmp = NULL;
 159
 160                         if (rdev && tmp != rdev)
 161                                 return ERR_PTR(-EINVAL);
 162                         rdev = tmp;
 163                 }
 164         }
 165
 166         if (attrs[NL80211_ATTR_IFINDEX]) {
 167                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 168                 netdev = __dev_get_by_index(netns, ifindex);
 169                 if (netdev) {
 170                         if (netdev->ieee80211_ptr)
 171                                 tmp = wiphy_to_rdev(
 172                                         netdev->ieee80211_ptr->wiphy);
 173                         else
 174                                 tmp = NULL;
 175
 176                         /* not wireless device -- return error */
 177                         if (!tmp)
 178                                 return ERR_PTR(-EINVAL);
 179
 180                         /* mismatch -- return error */
 181                         if (rdev && tmp != rdev)
 182                                 return ERR_PTR(-EINVAL);
 183
 184                         rdev = tmp;
 185                 }
 186         }
 187
 188         if (!rdev)
 189                 return ERR_PTR(-ENODEV);
 190
 191         if (netns != wiphy_net(&rdev->wiphy))
 192                 return ERR_PTR(-ENODEV);
 193
 194         return rdev;
 195 }
 196
 197 /*
 198  * This function returns a pointer to the driver
 199  * that the genl_info item that is passed refers to.
 200  *
 201  * The result of this can be a PTR_ERR and hence must
 202  * be checked with IS_ERR() for errors.
 203  */
 204 static struct cfg80211_registered_device *
 205 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 206 {
 207         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 208 }
 209
 210 /* policy for the attributes */
 211 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 212         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 213         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 214                                       .len = 20-1 },
 215         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 216
 217         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 218         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 219         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 220         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 222
 223         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 224         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 225         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 226         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 227         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 228
 229         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 231         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 232
 233         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 234         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 235
 236         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 237         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 238                                     .len = WLAN_MAX_KEY_LEN },
 239         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 240         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 241         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 242         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 243         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 244
 245         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 246         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 247         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 248                                        .len = IEEE80211_MAX_DATA_LEN },
 249         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 250                                        .len = IEEE80211_MAX_DATA_LEN },
 251         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 252         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 253         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 254         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 255                                                .len = NL80211_MAX_SUPP_RATES },
 256         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 257         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 258         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 259         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 260                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 261         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 262
 263         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 264         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 265
 266         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 267         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 268         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 269         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 270                                            .len = NL80211_MAX_SUPP_RATES },
 271         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 272
 273         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 274         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 275
 276         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 277
 278         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 280                               .len = IEEE80211_MAX_DATA_LEN },
 281         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 282         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 283
 284         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 285                                 .len = IEEE80211_MAX_SSID_LEN },
 286         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 287         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 288         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 289         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 290         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 291         [NL80211_ATTR_STA_FLAGS2] = {
 292                 .len = sizeof(struct nl80211_sta_flag_update),
 293         },
 294         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 295         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 296         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 297         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 298         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 300         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 301         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 302         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 303                                  .len = WLAN_PMKID_LEN },
 304         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 305         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 306         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 308                                  .len = IEEE80211_MAX_DATA_LEN },
 309         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 310         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 311         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 312         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 313         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 314         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 315         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 316         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 317         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 318         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 319         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 320         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 322         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 323         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 325         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 328         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 329                                          .len = IEEE80211_MAX_DATA_LEN },
 330         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 331                                          .len = IEEE80211_MAX_DATA_LEN },
 332         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 335         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 336         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 337         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 338         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 339         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 340         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 341         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 342                                       .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 344         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 346                 .len = NL80211_HT_CAPABILITY_LEN
 347         },
 348         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 349         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 350         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 351         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 352         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 353         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 354         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 355         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 356         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 357         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 358         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 359         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 360         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 361         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 362         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 363         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 364         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 365                 .len = NL80211_VHT_CAPABILITY_LEN,
 366         },
 367         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 368         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 369                                   .len = IEEE80211_MAX_DATA_LEN },
 370         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 371         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 372         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 373         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 374         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 375         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 376         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 377         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 378         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 379         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 380         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 381         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 382         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 383         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 384                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 385         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 386         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 387         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 388         [NL80211_ATTR_IFACE_SOCKET_OWNER] = { .type = NLA_FLAG },
 389         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 390 };
 391
 392 /* policy for the key attributes */
 393 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 394         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 395         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 396         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 397         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 398         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 399         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 400         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 401         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 402 };
 403
 404 /* policy for the key default flags */
 405 static const struct nla_policy
 406 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 407         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 408         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 409 };
 410
 411 /* policy for WoWLAN attributes */
 412 static const struct nla_policy
 413 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 414         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 415         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 416         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 417         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 418         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 419         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 420         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 421         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 422         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 423 };
 424
 425 static const struct nla_policy
 426 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 427         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 428         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 429         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 430         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 431         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 432         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 433         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 434                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 435         },
 436         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 437                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 438         },
 439         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 440         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 441         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 442 };
 443
 444 /* policy for coalesce rule attributes */
 445 static const struct nla_policy
 446 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 447         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 448         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 449         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 450 };
 451
 452 /* policy for GTK rekey offload attributes */
 453 static const struct nla_policy
 454 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 455         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 456         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 457         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 458 };
 459
 460 static const struct nla_policy
 461 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 462         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 463                                                  .len = IEEE80211_MAX_SSID_LEN },
 464         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 465 };
 466
 467 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 468                                      struct netlink_callback *cb,
 469                                      struct cfg80211_registered_device **rdev,
 470                                      struct wireless_dev **wdev)
 471 {
 472         int err;
 473
 474         rtnl_lock();
 475
 476         if (!cb->args[0]) {
 477                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 478                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 479                                   nl80211_policy);
 480                 if (err)
 481                         goto out_unlock;
 482
 483                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 484                                                    nl80211_fam.attrbuf);
 485                 if (IS_ERR(*wdev)) {
 486                         err = PTR_ERR(*wdev);
 487                         goto out_unlock;
 488                 }
 489                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 490                 /* 0 is the first index - add 1 to parse only once */
 491                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 492                 cb->args[1] = (*wdev)->identifier;
 493         } else {
 494                 /* subtract the 1 again here */
 495                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 496                 struct wireless_dev *tmp;
 497
 498                 if (!wiphy) {
 499                         err = -ENODEV;
 500                         goto out_unlock;
 501                 }
 502                 *rdev = wiphy_to_rdev(wiphy);
 503                 *wdev = NULL;
 504
 505                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 506                         if (tmp->identifier == cb->args[1]) {
 507                                 *wdev = tmp;
 508                                 break;
 509                         }
 510                 }
 511
 512                 if (!*wdev) {
 513                         err = -ENODEV;
 514                         goto out_unlock;
 515                 }
 516         }
 517
 518         return 0;
 519  out_unlock:
 520         rtnl_unlock();
 521         return err;
 522 }
 523
 524 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 525 {
 526         rtnl_unlock();
 527 }
 528
 529 /* IE validation */
 530 static bool is_valid_ie_attr(const struct nlattr *attr)
 531 {
 532         const u8 *pos;
 533         int len;
 534
 535         if (!attr)
 536                 return true;
 537
 538         pos = nla_data(attr);
 539         len = nla_len(attr);
 540
 541         while (len) {
 542                 u8 elemlen;
 543
 544                 if (len < 2)
 545                         return false;
 546                 len -= 2;
 547
 548                 elemlen = pos[1];
 549                 if (elemlen > len)
 550                         return false;
 551
 552                 len -= elemlen;
 553                 pos += 2 + elemlen;
 554         }
 555
 556         return true;
 557 }
 558
 559 /* message building helper */
 560 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 561                                    int flags, u8 cmd)
 562 {
 563         /* since there is no private header just add the generic one */
 564         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 565 }
 566
 567 static int nl80211_msg_put_channel(struct sk_buff *msg,
 568                                    struct ieee80211_channel *chan,
 569                                    bool large)
 570 {
 571         /* Some channels must be completely excluded from the
 572          * list to protect old user-space tools from breaking
 573          */
 574         if (!large && chan->flags &
 575             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 576                 return 0;
 577
 578         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 579                         chan->center_freq))
 580                 goto nla_put_failure;
 581
 582         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 583             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 584                 goto nla_put_failure;
 585         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 586                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 587                         goto nla_put_failure;
 588                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 589                         goto nla_put_failure;
 590         }
 591         if (chan->flags & IEEE80211_CHAN_RADAR) {
 592                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 593                         goto nla_put_failure;
 594                 if (large) {
 595                         u32 time;
 596
 597                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 598
 599                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 600                                         chan->dfs_state))
 601                                 goto nla_put_failure;
 602                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 603                                         time))
 604                                 goto nla_put_failure;
 605                         if (nla_put_u32(msg,
 606                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 607                                         chan->dfs_cac_ms))
 608                                 goto nla_put_failure;
 609                 }
 610         }
 611
 612         if (large) {
 613                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 614                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 615                         goto nla_put_failure;
 616                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 617                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 618                         goto nla_put_failure;
 619                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 620                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 621                         goto nla_put_failure;
 622                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 623                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 624                         goto nla_put_failure;
 625                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 626                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 627                         goto nla_put_failure;
 628                 if ((chan->flags & IEEE80211_CHAN_GO_CONCURRENT) &&
 629                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_GO_CONCURRENT))
 630                         goto nla_put_failure;
 631                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 632                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 633                         goto nla_put_failure;
 634                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 635                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 636                         goto nla_put_failure;
 637         }
 638
 639         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 640                         DBM_TO_MBM(chan->max_power)))
 641                 goto nla_put_failure;
 642
 643         return 0;
 644
 645  nla_put_failure:
 646         return -ENOBUFS;
 647 }
 648
 649 /* netlink command implementations */
 650
 651 struct key_parse {
 652         struct key_params p;
 653         int idx;
 654         int type;
 655         bool def, defmgmt;
 656         bool def_uni, def_multi;
 657 };
 658
 659 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 660 {
 661         struct nlattr *tb[NL80211_KEY_MAX + 1];
 662         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 663                                    nl80211_key_policy);
 664         if (err)
 665                 return err;
 666
 667         k->def = !!tb[NL80211_KEY_DEFAULT];
 668         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 669
 670         if (k->def) {
 671                 k->def_uni = true;
 672                 k->def_multi = true;
 673         }
 674         if (k->defmgmt)
 675                 k->def_multi = true;
 676
 677         if (tb[NL80211_KEY_IDX])
 678                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 679
 680         if (tb[NL80211_KEY_DATA]) {
 681                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 682                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 683         }
 684
 685         if (tb[NL80211_KEY_SEQ]) {
 686                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 687                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 688         }
 689
 690         if (tb[NL80211_KEY_CIPHER])
 691                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 692
 693         if (tb[NL80211_KEY_TYPE]) {
 694                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 695                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 696                         return -EINVAL;
 697         }
 698
 699         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 700                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 701                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 702                                        tb[NL80211_KEY_DEFAULT_TYPES],
 703                                        nl80211_key_default_policy);
 704                 if (err)
 705                         return err;
 706
 707                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 708                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 709         }
 710
 711         return 0;
 712 }
 713
 714 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 715 {
 716         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 717                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 718                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 719         }
 720
 721         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 722                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 723                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 724         }
 725
 726         if (info->attrs[NL80211_ATTR_KEY_IDX])
 727                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 728
 729         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 730                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 731
 732         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 733         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 734
 735         if (k->def) {
 736                 k->def_uni = true;
 737                 k->def_multi = true;
 738         }
 739         if (k->defmgmt)
 740                 k->def_multi = true;
 741
 742         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 743                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 744                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 745                         return -EINVAL;
 746         }
 747
 748         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 749                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 750                 int err = nla_parse_nested(
 751                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 752                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 753                                 nl80211_key_default_policy);
 754                 if (err)
 755                         return err;
 756
 757                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 758                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 765 {
 766         int err;
 767
 768         memset(k, 0, sizeof(*k));
 769         k->idx = -1;
 770         k->type = -1;
 771
 772         if (info->attrs[NL80211_ATTR_KEY])
 773                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 774         else
 775                 err = nl80211_parse_key_old(info, k);
 776
 777         if (err)
 778                 return err;
 779
 780         if (k->def && k->defmgmt)
 781                 return -EINVAL;
 782
 783         if (k->defmgmt) {
 784                 if (k->def_uni || !k->def_multi)
 785                         return -EINVAL;
 786         }
 787
 788         if (k->idx != -1) {
 789                 if (k->defmgmt) {
 790                         if (k->idx < 4 || k->idx > 5)
 791                                 return -EINVAL;
 792                 } else if (k->def) {
 793                         if (k->idx < 0 || k->idx > 3)
 794                                 return -EINVAL;
 795                 } else {
 796                         if (k->idx < 0 || k->idx > 5)
 797                                 return -EINVAL;
 798                 }
 799         }
 800
 801         return 0;
 802 }
 803
 804 static struct cfg80211_cached_keys *
 805 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 806                        struct nlattr *keys, bool *no_ht)
 807 {
 808         struct key_parse parse;
 809         struct nlattr *key;
 810         struct cfg80211_cached_keys *result;
 811         int rem, err, def = 0;
 812
 813         result = kzalloc(sizeof(*result), GFP_KERNEL);
 814         if (!result)
 815                 return ERR_PTR(-ENOMEM);
 816
 817         result->def = -1;
 818         result->defmgmt = -1;
 819
 820         nla_for_each_nested(key, keys, rem) {
 821                 memset(&parse, 0, sizeof(parse));
 822                 parse.idx = -1;
 823
 824                 err = nl80211_parse_key_new(key, &parse);
 825                 if (err)
 826                         goto error;
 827                 err = -EINVAL;
 828                 if (!parse.p.key)
 829                         goto error;
 830                 if (parse.idx < 0 || parse.idx > 4)
 831                         goto error;
 832                 if (parse.def) {
 833                         if (def)
 834                                 goto error;
 835                         def = 1;
 836                         result->def = parse.idx;
 837                         if (!parse.def_uni || !parse.def_multi)
 838                                 goto error;
 839                 } else if (parse.defmgmt)
 840                         goto error;
 841                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 842                                                      parse.idx, false, NULL);
 843                 if (err)
 844                         goto error;
 845                 result->params[parse.idx].cipher = parse.p.cipher;
 846                 result->params[parse.idx].key_len = parse.p.key_len;
 847                 result->params[parse.idx].key = result->data[parse.idx];
 848                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 849
 850                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 851                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 852                         if (no_ht)
 853                                 *no_ht = true;
 854                 }
 855         }
 856
 857         return result;
 858  error:
 859         kfree(result);
 860         return ERR_PTR(err);
 861 }
 862
 863 static int nl80211_key_allowed(struct wireless_dev *wdev)
 864 {
 865         ASSERT_WDEV_LOCK(wdev);
 866
 867         switch (wdev->iftype) {
 868         case NL80211_IFTYPE_AP:
 869         case NL80211_IFTYPE_AP_VLAN:
 870         case NL80211_IFTYPE_P2P_GO:
 871         case NL80211_IFTYPE_MESH_POINT:
 872                 break;
 873         case NL80211_IFTYPE_ADHOC:
 874         case NL80211_IFTYPE_STATION:
 875         case NL80211_IFTYPE_P2P_CLIENT:
 876                 if (!wdev->current_bss)
 877                         return -ENOLINK;
 878                 break;
 879         default:
 880                 return -EINVAL;
 881         }
 882
 883         return 0;
 884 }
 885
 886 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 887                                                         struct nlattr *tb)
 888 {
 889         struct ieee80211_channel *chan;
 890
 891         if (tb == NULL)
 892                 return NULL;
 893         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 894         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 895                 return NULL;
 896         return chan;
 897 }
 898
 899 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 900 {
 901         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 902         int i;
 903
 904         if (!nl_modes)
 905                 goto nla_put_failure;
 906
 907         i = 0;
 908         while (ifmodes) {
 909                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 910                         goto nla_put_failure;
 911                 ifmodes >>= 1;
 912                 i++;
 913         }
 914
 915         nla_nest_end(msg, nl_modes);
 916         return 0;
 917
 918 nla_put_failure:
 919         return -ENOBUFS;
 920 }
 921
 922 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 923                                           struct sk_buff *msg,
 924                                           bool large)
 925 {
 926         struct nlattr *nl_combis;
 927         int i, j;
 928
 929         nl_combis = nla_nest_start(msg,
 930                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 931         if (!nl_combis)
 932                 goto nla_put_failure;
 933
 934         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 935                 const struct ieee80211_iface_combination *c;
 936                 struct nlattr *nl_combi, *nl_limits;
 937
 938                 c = &wiphy->iface_combinations[i];
 939
 940                 nl_combi = nla_nest_start(msg, i + 1);
 941                 if (!nl_combi)
 942                         goto nla_put_failure;
 943
 944                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 945                 if (!nl_limits)
 946                         goto nla_put_failure;
 947
 948                 for (j = 0; j < c->n_limits; j++) {
 949                         struct nlattr *nl_limit;
 950
 951                         nl_limit = nla_nest_start(msg, j + 1);
 952                         if (!nl_limit)
 953                                 goto nla_put_failure;
 954                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 955                                         c->limits[j].max))
 956                                 goto nla_put_failure;
 957                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 958                                                 c->limits[j].types))
 959                                 goto nla_put_failure;
 960                         nla_nest_end(msg, nl_limit);
 961                 }
 962
 963                 nla_nest_end(msg, nl_limits);
 964
 965                 if (c->beacon_int_infra_match &&
 966                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 967                         goto nla_put_failure;
 968                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 969                                 c->num_different_channels) ||
 970                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 971                                 c->max_interfaces))
 972                         goto nla_put_failure;
 973                 if (large &&
 974                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 975                                 c->radar_detect_widths) ||
 976                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
 977                                 c->radar_detect_regions)))
 978                         goto nla_put_failure;
 979
 980                 nla_nest_end(msg, nl_combi);
 981         }
 982
 983         nla_nest_end(msg, nl_combis);
 984
 985         return 0;
 986 nla_put_failure:
 987         return -ENOBUFS;
 988 }
 989
 990 #ifdef CONFIG_PM
 991 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 992                                         struct sk_buff *msg)
 993 {
 994         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 995         struct nlattr *nl_tcp;
 996
 997         if (!tcp)
 998                 return 0;
 999
1000         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1001         if (!nl_tcp)
1002                 return -ENOBUFS;
1003
1004         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1005                         tcp->data_payload_max))
1006                 return -ENOBUFS;
1007
1008         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1009                         tcp->data_payload_max))
1010                 return -ENOBUFS;
1011
1012         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1013                 return -ENOBUFS;
1014
1015         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1016                                 sizeof(*tcp->tok), tcp->tok))
1017                 return -ENOBUFS;
1018
1019         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1020                         tcp->data_interval_max))
1021                 return -ENOBUFS;
1022
1023         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1024                         tcp->wake_payload_max))
1025                 return -ENOBUFS;
1026
1027         nla_nest_end(msg, nl_tcp);
1028         return 0;
1029 }
1030
1031 static int nl80211_send_wowlan(struct sk_buff *msg,
1032                                struct cfg80211_registered_device *rdev,
1033                                bool large)
1034 {
1035         struct nlattr *nl_wowlan;
1036
1037         if (!rdev->wiphy.wowlan)
1038                 return 0;
1039
1040         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1041         if (!nl_wowlan)
1042                 return -ENOBUFS;
1043
1044         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1045              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1046             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1047              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1048             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1049              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1050             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1051              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1052             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1053              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1054             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1055              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1056             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1057              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1058             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1059              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1060                 return -ENOBUFS;
1061
1062         if (rdev->wiphy.wowlan->n_patterns) {
1063                 struct nl80211_pattern_support pat = {
1064                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1065                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1066                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1067                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1068                 };
1069
1070                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1071                             sizeof(pat), &pat))
1072                         return -ENOBUFS;
1073         }
1074
1075         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1076                 return -ENOBUFS;
1077
1078         nla_nest_end(msg, nl_wowlan);
1079
1080         return 0;
1081 }
1082 #endif
1083
1084 static int nl80211_send_coalesce(struct sk_buff *msg,
1085                                  struct cfg80211_registered_device *rdev)
1086 {
1087         struct nl80211_coalesce_rule_support rule;
1088
1089         if (!rdev->wiphy.coalesce)
1090                 return 0;
1091
1092         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1093         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1094         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1095         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1096         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1097         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1098
1099         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1100                 return -ENOBUFS;
1101
1102         return 0;
1103 }
1104
1105 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1106                                       struct ieee80211_supported_band *sband)
1107 {
1108         struct nlattr *nl_rates, *nl_rate;
1109         struct ieee80211_rate *rate;
1110         int i;
1111
1112         /* add HT info */
1113         if (sband->ht_cap.ht_supported &&
1114             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1115                      sizeof(sband->ht_cap.mcs),
1116                      &sband->ht_cap.mcs) ||
1117              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1118                          sband->ht_cap.cap) ||
1119              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1120                         sband->ht_cap.ampdu_factor) ||
1121              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1122                         sband->ht_cap.ampdu_density)))
1123                 return -ENOBUFS;
1124
1125         /* add VHT info */
1126         if (sband->vht_cap.vht_supported &&
1127             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1128                      sizeof(sband->vht_cap.vht_mcs),
1129                      &sband->vht_cap.vht_mcs) ||
1130              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1131                          sband->vht_cap.cap)))
1132                 return -ENOBUFS;
1133
1134         /* add bitrates */
1135         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1136         if (!nl_rates)
1137                 return -ENOBUFS;
1138
1139         for (i = 0; i < sband->n_bitrates; i++) {
1140                 nl_rate = nla_nest_start(msg, i);
1141                 if (!nl_rate)
1142                         return -ENOBUFS;
1143
1144                 rate = &sband->bitrates[i];
1145                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1146                                 rate->bitrate))
1147                         return -ENOBUFS;
1148                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1149                     nla_put_flag(msg,
1150                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1151                         return -ENOBUFS;
1152
1153                 nla_nest_end(msg, nl_rate);
1154         }
1155
1156         nla_nest_end(msg, nl_rates);
1157
1158         return 0;
1159 }
1160
1161 static int
1162 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1163                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1164 {
1165         u16 stypes;
1166         struct nlattr *nl_ftypes, *nl_ifs;
1167         enum nl80211_iftype ift;
1168         int i;
1169
1170         if (!mgmt_stypes)
1171                 return 0;
1172
1173         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1174         if (!nl_ifs)
1175                 return -ENOBUFS;
1176
1177         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1178                 nl_ftypes = nla_nest_start(msg, ift);
1179                 if (!nl_ftypes)
1180                         return -ENOBUFS;
1181                 i = 0;
1182                 stypes = mgmt_stypes[ift].tx;
1183                 while (stypes) {
1184                         if ((stypes & 1) &&
1185                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1186                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1187                                 return -ENOBUFS;
1188                         stypes >>= 1;
1189                         i++;
1190                 }
1191                 nla_nest_end(msg, nl_ftypes);
1192         }
1193
1194         nla_nest_end(msg, nl_ifs);
1195
1196         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1197         if (!nl_ifs)
1198                 return -ENOBUFS;
1199
1200         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1201                 nl_ftypes = nla_nest_start(msg, ift);
1202                 if (!nl_ftypes)
1203                         return -ENOBUFS;
1204                 i = 0;
1205                 stypes = mgmt_stypes[ift].rx;
1206                 while (stypes) {
1207                         if ((stypes & 1) &&
1208                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1209                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1210                                 return -ENOBUFS;
1211                         stypes >>= 1;
1212                         i++;
1213                 }
1214                 nla_nest_end(msg, nl_ftypes);
1215         }
1216         nla_nest_end(msg, nl_ifs);
1217
1218         return 0;
1219 }
1220
1221 struct nl80211_dump_wiphy_state {
1222         s64 filter_wiphy;
1223         long start;
1224         long split_start, band_start, chan_start;
1225         bool split;
1226 };
1227
1228 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1229                               enum nl80211_commands cmd,
1230                               struct sk_buff *msg, u32 portid, u32 seq,
1231                               int flags, struct nl80211_dump_wiphy_state *state)
1232 {
1233         void *hdr;
1234         struct nlattr *nl_bands, *nl_band;
1235         struct nlattr *nl_freqs, *nl_freq;
1236         struct nlattr *nl_cmds;
1237         enum ieee80211_band band;
1238         struct ieee80211_channel *chan;
1239         int i;
1240         const struct ieee80211_txrx_stypes *mgmt_stypes =
1241                                 rdev->wiphy.mgmt_stypes;
1242         u32 features;
1243
1244         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1245         if (!hdr)
1246                 return -ENOBUFS;
1247
1248         if (WARN_ON(!state))
1249                 return -EINVAL;
1250
1251         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1252             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1253                            wiphy_name(&rdev->wiphy)) ||
1254             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1255                         cfg80211_rdev_list_generation))
1256                 goto nla_put_failure;
1257
1258         if (cmd != NL80211_CMD_NEW_WIPHY)
1259                 goto finish;
1260
1261         switch (state->split_start) {
1262         case 0:
1263                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1264                                rdev->wiphy.retry_short) ||
1265                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1266                                rdev->wiphy.retry_long) ||
1267                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1268                                 rdev->wiphy.frag_threshold) ||
1269                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1270                                 rdev->wiphy.rts_threshold) ||
1271                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1272                                rdev->wiphy.coverage_class) ||
1273                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1274                                rdev->wiphy.max_scan_ssids) ||
1275                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1276                                rdev->wiphy.max_sched_scan_ssids) ||
1277                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1278                                 rdev->wiphy.max_scan_ie_len) ||
1279                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1280                                 rdev->wiphy.max_sched_scan_ie_len) ||
1281                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1282                                rdev->wiphy.max_match_sets))
1283                         goto nla_put_failure;
1284
1285                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1286                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1287                         goto nla_put_failure;
1288                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1289                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1290                         goto nla_put_failure;
1291                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1292                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1293                         goto nla_put_failure;
1294                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1295                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1296                         goto nla_put_failure;
1297                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1298                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1299                         goto nla_put_failure;
1300                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1301                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1302                         goto nla_put_failure;
1303                 state->split_start++;
1304                 if (state->split)
1305                         break;
1306         case 1:
1307                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1308                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1309                             rdev->wiphy.cipher_suites))
1310                         goto nla_put_failure;
1311
1312                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1313                                rdev->wiphy.max_num_pmkids))
1314                         goto nla_put_failure;
1315
1316                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1317                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1318                         goto nla_put_failure;
1319
1320                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1321                                 rdev->wiphy.available_antennas_tx) ||
1322                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1323                                 rdev->wiphy.available_antennas_rx))
1324                         goto nla_put_failure;
1325
1326                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1327                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1328                                 rdev->wiphy.probe_resp_offload))
1329                         goto nla_put_failure;
1330
1331                 if ((rdev->wiphy.available_antennas_tx ||
1332                      rdev->wiphy.available_antennas_rx) &&
1333                     rdev->ops->get_antenna) {
1334                         u32 tx_ant = 0, rx_ant = 0;
1335                         int res;
1336                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1337                         if (!res) {
1338                                 if (nla_put_u32(msg,
1339                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1340                                                 tx_ant) ||
1341                                     nla_put_u32(msg,
1342                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1343                                                 rx_ant))
1344                                         goto nla_put_failure;
1345                         }
1346                 }
1347
1348                 state->split_start++;
1349                 if (state->split)
1350                         break;
1351         case 2:
1352                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1353                                         rdev->wiphy.interface_modes))
1354                                 goto nla_put_failure;
1355                 state->split_start++;
1356                 if (state->split)
1357                         break;
1358         case 3:
1359                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1360                 if (!nl_bands)
1361                         goto nla_put_failure;
1362
1363                 for (band = state->band_start;
1364                      band < IEEE80211_NUM_BANDS; band++) {
1365                         struct ieee80211_supported_band *sband;
1366
1367                         sband = rdev->wiphy.bands[band];
1368
1369                         if (!sband)
1370                                 continue;
1371
1372                         nl_band = nla_nest_start(msg, band);
1373                         if (!nl_band)
1374                                 goto nla_put_failure;
1375
1376                         switch (state->chan_start) {
1377                         case 0:
1378                                 if (nl80211_send_band_rateinfo(msg, sband))
1379                                         goto nla_put_failure;
1380                                 state->chan_start++;
1381                                 if (state->split)
1382                                         break;
1383                         default:
1384                                 /* add frequencies */
1385                                 nl_freqs = nla_nest_start(
1386                                         msg, NL80211_BAND_ATTR_FREQS);
1387                                 if (!nl_freqs)
1388                                         goto nla_put_failure;
1389
1390                                 for (i = state->chan_start - 1;
1391                                      i < sband->n_channels;
1392                                      i++) {
1393                                         nl_freq = nla_nest_start(msg, i);
1394                                         if (!nl_freq)
1395                                                 goto nla_put_failure;
1396
1397                                         chan = &sband->channels[i];
1398
1399                                         if (nl80211_msg_put_channel(
1400                                                         msg, chan,
1401                                                         state->split))
1402                                                 goto nla_put_failure;
1403
1404                                         nla_nest_end(msg, nl_freq);
1405                                         if (state->split)
1406                                                 break;
1407                                 }
1408                                 if (i < sband->n_channels)
1409                                         state->chan_start = i + 2;
1410                                 else
1411                                         state->chan_start = 0;
1412                                 nla_nest_end(msg, nl_freqs);
1413                         }
1414
1415                         nla_nest_end(msg, nl_band);
1416
1417                         if (state->split) {
1418                                 /* start again here */
1419                                 if (state->chan_start)
1420                                         band--;
1421                                 break;
1422                         }
1423                 }
1424                 nla_nest_end(msg, nl_bands);
1425
1426                 if (band < IEEE80211_NUM_BANDS)
1427                         state->band_start = band + 1;
1428                 else
1429                         state->band_start = 0;
1430
1431                 /* if bands & channels are done, continue outside */
1432                 if (state->band_start == 0 && state->chan_start == 0)
1433                         state->split_start++;
1434                 if (state->split)
1435                         break;
1436         case 4:
1437                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1438                 if (!nl_cmds)
1439                         goto nla_put_failure;
1440
1441                 i = 0;
1442 #define CMD(op, n)                                                      \
1443                  do {                                                   \
1444                         if (rdev->ops->op) {                            \
1445                                 i++;                                    \
1446                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1447                                         goto nla_put_failure;           \
1448                         }                                               \
1449                 } while (0)
1450
1451                 CMD(add_virtual_intf, NEW_INTERFACE);
1452                 CMD(change_virtual_intf, SET_INTERFACE);
1453                 CMD(add_key, NEW_KEY);
1454                 CMD(start_ap, START_AP);
1455                 CMD(add_station, NEW_STATION);
1456                 CMD(add_mpath, NEW_MPATH);
1457                 CMD(update_mesh_config, SET_MESH_CONFIG);
1458                 CMD(change_bss, SET_BSS);
1459                 CMD(auth, AUTHENTICATE);
1460                 CMD(assoc, ASSOCIATE);
1461                 CMD(deauth, DEAUTHENTICATE);
1462                 CMD(disassoc, DISASSOCIATE);
1463                 CMD(join_ibss, JOIN_IBSS);
1464                 CMD(join_mesh, JOIN_MESH);
1465                 CMD(set_pmksa, SET_PMKSA);
1466                 CMD(del_pmksa, DEL_PMKSA);
1467                 CMD(flush_pmksa, FLUSH_PMKSA);
1468                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1469                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1470                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1471                 CMD(mgmt_tx, FRAME);
1472                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1473                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1474                         i++;
1475                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1476                                 goto nla_put_failure;
1477                 }
1478                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1479                     rdev->ops->join_mesh) {
1480                         i++;
1481                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1482                                 goto nla_put_failure;
1483                 }
1484                 CMD(set_wds_peer, SET_WDS_PEER);
1485                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1486                         CMD(tdls_mgmt, TDLS_MGMT);
1487                         CMD(tdls_oper, TDLS_OPER);
1488                 }
1489                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1490                         CMD(sched_scan_start, START_SCHED_SCAN);
1491                 CMD(probe_client, PROBE_CLIENT);
1492                 CMD(set_noack_map, SET_NOACK_MAP);
1493                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1494                         i++;
1495                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1496                                 goto nla_put_failure;
1497                 }
1498                 CMD(start_p2p_device, START_P2P_DEVICE);
1499                 CMD(set_mcast_rate, SET_MCAST_RATE);
1500 #ifdef CONFIG_NL80211_TESTMODE
1501                 CMD(testmode_cmd, TESTMODE);
1502 #endif
1503                 if (state->split) {
1504                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1505                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1506                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1507                                 CMD(channel_switch, CHANNEL_SWITCH);
1508                         CMD(set_qos_map, SET_QOS_MAP);
1509                 }
1510                 /* add into the if now */
1511 #undef CMD
1512
1513                 if (rdev->ops->connect || rdev->ops->auth) {
1514                         i++;
1515                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1516                                 goto nla_put_failure;
1517                 }
1518
1519                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1520                         i++;
1521                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1522                                 goto nla_put_failure;
1523                 }
1524
1525                 nla_nest_end(msg, nl_cmds);
1526                 state->split_start++;
1527                 if (state->split)
1528                         break;
1529         case 5:
1530                 if (rdev->ops->remain_on_channel &&
1531                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1532                     nla_put_u32(msg,
1533                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1534                                 rdev->wiphy.max_remain_on_channel_duration))
1535                         goto nla_put_failure;
1536
1537                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1538                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1539                         goto nla_put_failure;
1540
1541                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1542                         goto nla_put_failure;
1543                 state->split_start++;
1544                 if (state->split)
1545                         break;
1546         case 6:
1547 #ifdef CONFIG_PM
1548                 if (nl80211_send_wowlan(msg, rdev, state->split))
1549                         goto nla_put_failure;
1550                 state->split_start++;
1551                 if (state->split)
1552                         break;
1553 #else
1554                 state->split_start++;
1555 #endif
1556         case 7:
1557                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1558                                         rdev->wiphy.software_iftypes))
1559                         goto nla_put_failure;
1560
1561                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1562                                                    state->split))
1563                         goto nla_put_failure;
1564
1565                 state->split_start++;
1566                 if (state->split)
1567                         break;
1568         case 8:
1569                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1570                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1571                                 rdev->wiphy.ap_sme_capa))
1572                         goto nla_put_failure;
1573
1574                 features = rdev->wiphy.features;
1575                 /*
1576                  * We can only add the per-channel limit information if the
1577                  * dump is split, otherwise it makes it too big. Therefore
1578                  * only advertise it in that case.
1579                  */
1580                 if (state->split)
1581                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1582                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1583                         goto nla_put_failure;
1584
1585                 if (rdev->wiphy.ht_capa_mod_mask &&
1586                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1587                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1588                             rdev->wiphy.ht_capa_mod_mask))
1589                         goto nla_put_failure;
1590
1591                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1592                     rdev->wiphy.max_acl_mac_addrs &&
1593                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1594                                 rdev->wiphy.max_acl_mac_addrs))
1595                         goto nla_put_failure;
1596
1597                 /*
1598                  * Any information below this point is only available to
1599                  * applications that can deal with it being split. This
1600                  * helps ensure that newly added capabilities don't break
1601                  * older tools by overrunning their buffers.
1602                  *
1603                  * We still increment split_start so that in the split
1604                  * case we'll continue with more data in the next round,
1605                  * but break unconditionally so unsplit data stops here.
1606                  */
1607                 state->split_start++;
1608                 break;
1609         case 9:
1610                 if (rdev->wiphy.extended_capabilities &&
1611                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1612                              rdev->wiphy.extended_capabilities_len,
1613                              rdev->wiphy.extended_capabilities) ||
1614                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1615                              rdev->wiphy.extended_capabilities_len,
1616                              rdev->wiphy.extended_capabilities_mask)))
1617                         goto nla_put_failure;
1618
1619                 if (rdev->wiphy.vht_capa_mod_mask &&
1620                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1621                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1622                             rdev->wiphy.vht_capa_mod_mask))
1623                         goto nla_put_failure;
1624
1625                 state->split_start++;
1626                 break;
1627         case 10:
1628                 if (nl80211_send_coalesce(msg, rdev))
1629                         goto nla_put_failure;
1630
1631                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1632                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1633                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1634                         goto nla_put_failure;
1635
1636                 if (rdev->wiphy.max_ap_assoc_sta &&
1637                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1638                                 rdev->wiphy.max_ap_assoc_sta))
1639                         goto nla_put_failure;
1640
1641                 state->split_start++;
1642                 break;
1643         case 11:
1644                 if (rdev->wiphy.n_vendor_commands) {
1645                         const struct nl80211_vendor_cmd_info *info;
1646                         struct nlattr *nested;
1647
1648                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1649                         if (!nested)
1650                                 goto nla_put_failure;
1651
1652                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1653                                 info = &rdev->wiphy.vendor_commands[i].info;
1654                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1655                                         goto nla_put_failure;
1656                         }
1657                         nla_nest_end(msg, nested);
1658                 }
1659
1660                 if (rdev->wiphy.n_vendor_events) {
1661                         const struct nl80211_vendor_cmd_info *info;
1662                         struct nlattr *nested;
1663
1664                         nested = nla_nest_start(msg,
1665                                                 NL80211_ATTR_VENDOR_EVENTS);
1666                         if (!nested)
1667                                 goto nla_put_failure;
1668
1669                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1670                                 info = &rdev->wiphy.vendor_events[i];
1671                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1672                                         goto nla_put_failure;
1673                         }
1674                         nla_nest_end(msg, nested);
1675                 }
1676                 state->split_start++;
1677                 break;
1678         case 12:
1679                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1680                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1681                                rdev->wiphy.max_num_csa_counters))
1682                         goto nla_put_failure;
1683
1684                 /* done */
1685                 state->split_start = 0;
1686                 break;
1687         }
1688  finish:
1689         return genlmsg_end(msg, hdr);
1690
1691  nla_put_failure:
1692         genlmsg_cancel(msg, hdr);
1693         return -EMSGSIZE;
1694 }
1695
1696 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1697                                     struct netlink_callback *cb,
1698                                     struct nl80211_dump_wiphy_state *state)
1699 {
1700         struct nlattr **tb = nl80211_fam.attrbuf;
1701         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1702                               tb, nl80211_fam.maxattr, nl80211_policy);
1703         /* ignore parse errors for backward compatibility */
1704         if (ret)
1705                 return 0;
1706
1707         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1708         if (tb[NL80211_ATTR_WIPHY])
1709                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1710         if (tb[NL80211_ATTR_WDEV])
1711                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1712         if (tb[NL80211_ATTR_IFINDEX]) {
1713                 struct net_device *netdev;
1714                 struct cfg80211_registered_device *rdev;
1715                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1716
1717                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1718                 if (!netdev)
1719                         return -ENODEV;
1720                 if (netdev->ieee80211_ptr) {
1721                         rdev = wiphy_to_rdev(
1722                                 netdev->ieee80211_ptr->wiphy);
1723                         state->filter_wiphy = rdev->wiphy_idx;
1724                 }
1725         }
1726
1727         return 0;
1728 }
1729
1730 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1731 {
1732         int idx = 0, ret;
1733         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1734         struct cfg80211_registered_device *rdev;
1735
1736         rtnl_lock();
1737         if (!state) {
1738                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1739                 if (!state) {
1740                         rtnl_unlock();
1741                         return -ENOMEM;
1742                 }
1743                 state->filter_wiphy = -1;
1744                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1745                 if (ret) {
1746                         kfree(state);
1747                         rtnl_unlock();
1748                         return ret;
1749                 }
1750                 cb->args[0] = (long)state;
1751         }
1752
1753         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1754                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1755                         continue;
1756                 if (++idx <= state->start)
1757                         continue;
1758                 if (state->filter_wiphy != -1 &&
1759                     state->filter_wiphy != rdev->wiphy_idx)
1760                         continue;
1761                 /* attempt to fit multiple wiphy data chunks into the skb */
1762                 do {
1763                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1764                                                  skb,
1765                                                  NETLINK_CB(cb->skb).portid,
1766                                                  cb->nlh->nlmsg_seq,
1767                                                  NLM_F_MULTI, state);
1768                         if (ret < 0) {
1769                                 /*
1770                                  * If sending the wiphy data didn't fit (ENOBUFS
1771                                  * or EMSGSIZE returned), this SKB is still
1772                                  * empty (so it's not too big because another
1773                                  * wiphy dataset is already in the skb) and
1774                                  * we've not tried to adjust the dump allocation
1775                                  * yet ... then adjust the alloc size to be
1776                                  * bigger, and return 1 but with the empty skb.
1777                                  * This results in an empty message being RX'ed
1778                                  * in userspace, but that is ignored.
1779                                  *
1780                                  * We can then retry with the larger buffer.
1781                                  */
1782                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1783                                     !skb->len && !state->split &&
1784                                     cb->min_dump_alloc < 4096) {
1785                                         cb->min_dump_alloc = 4096;
1786                                         state->split_start = 0;
1787                                         rtnl_unlock();
1788                                         return 1;
1789                                 }
1790                                 idx--;
1791                                 break;
1792                         }
1793                 } while (state->split_start > 0);
1794                 break;
1795         }
1796         rtnl_unlock();
1797
1798         state->start = idx;
1799
1800         return skb->len;
1801 }
1802
1803 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1804 {
1805         kfree((void *)cb->args[0]);
1806         return 0;
1807 }
1808
1809 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1810 {
1811         struct sk_buff *msg;
1812         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1813         struct nl80211_dump_wiphy_state state = {};
1814
1815         msg = nlmsg_new(4096, GFP_KERNEL);
1816         if (!msg)
1817                 return -ENOMEM;
1818
1819         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1820                                info->snd_portid, info->snd_seq, 0,
1821                                &state) < 0) {
1822                 nlmsg_free(msg);
1823                 return -ENOBUFS;
1824         }
1825
1826         return genlmsg_reply(msg, info);
1827 }
1828
1829 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1830         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1831         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1832         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1833         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1834         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1835 };
1836
1837 static int parse_txq_params(struct nlattr *tb[],
1838                             struct ieee80211_txq_params *txq_params)
1839 {
1840         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1841             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1842             !tb[NL80211_TXQ_ATTR_AIFS])
1843                 return -EINVAL;
1844
1845         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1846         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1847         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1848         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1849         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1850
1851         if (txq_params->ac >= NL80211_NUM_ACS)
1852                 return -EINVAL;
1853
1854         return 0;
1855 }
1856
1857 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1858 {
1859         /*
1860          * You can only set the channel explicitly for WDS interfaces,
1861          * all others have their channel managed via their respective
1862          * "establish a connection" command (connect, join, ...)
1863          *
1864          * For AP/GO and mesh mode, the channel can be set with the
1865          * channel userspace API, but is only stored and passed to the
1866          * low-level driver when the AP starts or the mesh is joined.
1867          * This is for backward compatibility, userspace can also give
1868          * the channel in the start-ap or join-mesh commands instead.
1869          *
1870          * Monitors are special as they are normally slaved to
1871          * whatever else is going on, so they have their own special
1872          * operation to set the monitor channel if possible.
1873          */
1874         return !wdev ||
1875                 wdev->iftype == NL80211_IFTYPE_AP ||
1876                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1877                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1878                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1879 }
1880
1881 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1882                                  struct genl_info *info,
1883                                  struct cfg80211_chan_def *chandef)
1884 {
1885         u32 control_freq;
1886
1887         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1888                 return -EINVAL;
1889
1890         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1891
1892         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1893         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1894         chandef->center_freq1 = control_freq;
1895         chandef->center_freq2 = 0;
1896
1897         /* Primary channel not allowed */
1898         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1899                 return -EINVAL;
1900
1901         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1902                 enum nl80211_channel_type chantype;
1903
1904                 chantype = nla_get_u32(
1905                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1906
1907                 switch (chantype) {
1908                 case NL80211_CHAN_NO_HT:
1909                 case NL80211_CHAN_HT20:
1910                 case NL80211_CHAN_HT40PLUS:
1911                 case NL80211_CHAN_HT40MINUS:
1912                         cfg80211_chandef_create(chandef, chandef->chan,
1913                                                 chantype);
1914                         break;
1915                 default:
1916                         return -EINVAL;
1917                 }
1918         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1919                 chandef->width =
1920                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1921                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1922                         chandef->center_freq1 =
1923                                 nla_get_u32(
1924                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1925                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1926                         chandef->center_freq2 =
1927                                 nla_get_u32(
1928                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1929         }
1930
1931         if (!cfg80211_chandef_valid(chandef))
1932                 return -EINVAL;
1933
1934         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1935                                      IEEE80211_CHAN_DISABLED))
1936                 return -EINVAL;
1937
1938         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1939              chandef->width == NL80211_CHAN_WIDTH_10) &&
1940             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1941                 return -EINVAL;
1942
1943         return 0;
1944 }
1945
1946 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1947                                  struct net_device *dev,
1948                                  struct genl_info *info)
1949 {
1950         struct cfg80211_chan_def chandef;
1951         int result;
1952         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1953         struct wireless_dev *wdev = NULL;
1954
1955         if (dev)
1956                 wdev = dev->ieee80211_ptr;
1957         if (!nl80211_can_set_dev_channel(wdev))
1958                 return -EOPNOTSUPP;
1959         if (wdev)
1960                 iftype = wdev->iftype;
1961
1962         result = nl80211_parse_chandef(rdev, info, &chandef);
1963         if (result)
1964                 return result;
1965
1966         switch (iftype) {
1967         case NL80211_IFTYPE_AP:
1968         case NL80211_IFTYPE_P2P_GO:
1969                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, iftype)) {
1970                         result = -EINVAL;
1971                         break;
1972                 }
1973                 if (wdev->beacon_interval) {
1974                         if (!dev || !rdev->ops->set_ap_chanwidth ||
1975                             !(rdev->wiphy.features &
1976                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
1977                                 result = -EBUSY;
1978                                 break;
1979                         }
1980
1981                         /* Only allow dynamic channel width changes */
1982                         if (chandef.chan != wdev->preset_chandef.chan) {
1983                                 result = -EBUSY;
1984                                 break;
1985                         }
1986                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
1987                         if (result)
1988                                 break;
1989                 }
1990                 wdev->preset_chandef = chandef;
1991                 result = 0;
1992                 break;
1993         case NL80211_IFTYPE_MESH_POINT:
1994                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1995                 break;
1996         case NL80211_IFTYPE_MONITOR:
1997                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1998                 break;
1999         default:
2000                 result = -EINVAL;
2001         }
2002
2003         return result;
2004 }
2005
2006 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2007 {
2008         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2009         struct net_device *netdev = info->user_ptr[1];
2010
2011         return __nl80211_set_channel(rdev, netdev, info);
2012 }
2013
2014 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2015 {
2016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2017         struct net_device *dev = info->user_ptr[1];
2018         struct wireless_dev *wdev = dev->ieee80211_ptr;
2019         const u8 *bssid;
2020
2021         if (!info->attrs[NL80211_ATTR_MAC])
2022                 return -EINVAL;
2023
2024         if (netif_running(dev))
2025                 return -EBUSY;
2026
2027         if (!rdev->ops->set_wds_peer)
2028                 return -EOPNOTSUPP;
2029
2030         if (wdev->iftype != NL80211_IFTYPE_WDS)
2031                 return -EOPNOTSUPP;
2032
2033         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2034         return rdev_set_wds_peer(rdev, dev, bssid);
2035 }
2036
2037
2038 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2039 {
2040         struct cfg80211_registered_device *rdev;
2041         struct net_device *netdev = NULL;
2042         struct wireless_dev *wdev;
2043         int result = 0, rem_txq_params = 0;
2044         struct nlattr *nl_txq_params;
2045         u32 changed;
2046         u8 retry_short = 0, retry_long = 0;
2047         u32 frag_threshold = 0, rts_threshold = 0;
2048         u8 coverage_class = 0;
2049
2050         ASSERT_RTNL();
2051
2052         /*
2053          * Try to find the wiphy and netdev. Normally this
2054          * function shouldn't need the netdev, but this is
2055          * done for backward compatibility -- previously
2056          * setting the channel was done per wiphy, but now
2057          * it is per netdev. Previous userland like hostapd
2058          * also passed a netdev to set_wiphy, so that it is
2059          * possible to let that go to the right netdev!
2060          */
2061
2062         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2063                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2064
2065                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2066                 if (netdev && netdev->ieee80211_ptr)
2067                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2068                 else
2069                         netdev = NULL;
2070         }
2071
2072         if (!netdev) {
2073                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2074                                                   info->attrs);
2075                 if (IS_ERR(rdev))
2076                         return PTR_ERR(rdev);
2077                 wdev = NULL;
2078                 netdev = NULL;
2079                 result = 0;
2080         } else
2081                 wdev = netdev->ieee80211_ptr;
2082
2083         /*
2084          * end workaround code, by now the rdev is available
2085          * and locked, and wdev may or may not be NULL.
2086          */
2087
2088         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2089                 result = cfg80211_dev_rename(
2090                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2091
2092         if (result)
2093                 return result;
2094
2095         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2096                 struct ieee80211_txq_params txq_params;
2097                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2098
2099                 if (!rdev->ops->set_txq_params)
2100                         return -EOPNOTSUPP;
2101
2102                 if (!netdev)
2103                         return -EINVAL;
2104
2105                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2106                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2107                         return -EINVAL;
2108
2109                 if (!netif_running(netdev))
2110                         return -ENETDOWN;
2111
2112                 nla_for_each_nested(nl_txq_params,
2113                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2114                                     rem_txq_params) {
2115                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2116                                            nla_data(nl_txq_params),
2117                                            nla_len(nl_txq_params),
2118                                            txq_params_policy);
2119                         if (result)
2120                                 return result;
2121                         result = parse_txq_params(tb, &txq_params);
2122                         if (result)
2123                                 return result;
2124
2125                         result = rdev_set_txq_params(rdev, netdev,
2126                                                      &txq_params);
2127                         if (result)
2128                                 return result;
2129                 }
2130         }
2131
2132         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2133                 result = __nl80211_set_channel(
2134                         rdev,
2135                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2136                         info);
2137                 if (result)
2138                         return result;
2139         }
2140
2141         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2142                 struct wireless_dev *txp_wdev = wdev;
2143                 enum nl80211_tx_power_setting type;
2144                 int idx, mbm = 0;
2145
2146                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2147                         txp_wdev = NULL;
2148
2149                 if (!rdev->ops->set_tx_power)
2150                         return -EOPNOTSUPP;
2151
2152                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2153                 type = nla_get_u32(info->attrs[idx]);
2154
2155                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2156                     (type != NL80211_TX_POWER_AUTOMATIC))
2157                         return -EINVAL;
2158
2159                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2160                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2161                         mbm = nla_get_u32(info->attrs[idx]);
2162                 }
2163
2164                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2165                 if (result)
2166                         return result;
2167         }
2168
2169         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2170             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2171                 u32 tx_ant, rx_ant;
2172                 if ((!rdev->wiphy.available_antennas_tx &&
2173                      !rdev->wiphy.available_antennas_rx) ||
2174                     !rdev->ops->set_antenna)
2175                         return -EOPNOTSUPP;
2176
2177                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2178                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2179
2180                 /* reject antenna configurations which don't match the
2181                  * available antenna masks, except for the "all" mask */
2182                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2183                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2184                         return -EINVAL;
2185
2186                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2187                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2188
2189                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2190                 if (result)
2191                         return result;
2192         }
2193
2194         changed = 0;
2195
2196         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2197                 retry_short = nla_get_u8(
2198                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2199                 if (retry_short == 0)
2200                         return -EINVAL;
2201
2202                 changed |= WIPHY_PARAM_RETRY_SHORT;
2203         }
2204
2205         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2206                 retry_long = nla_get_u8(
2207                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2208                 if (retry_long == 0)
2209                         return -EINVAL;
2210
2211                 changed |= WIPHY_PARAM_RETRY_LONG;
2212         }
2213
2214         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2215                 frag_threshold = nla_get_u32(
2216                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2217                 if (frag_threshold < 256)
2218                         return -EINVAL;
2219
2220                 if (frag_threshold != (u32) -1) {
2221                         /*
2222                          * Fragments (apart from the last one) are required to
2223                          * have even length. Make the fragmentation code
2224                          * simpler by stripping LSB should someone try to use
2225                          * odd threshold value.
2226                          */
2227                         frag_threshold &= ~0x1;
2228                 }
2229                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2230         }
2231
2232         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2233                 rts_threshold = nla_get_u32(
2234                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2235                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2236         }
2237
2238         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2239                 coverage_class = nla_get_u8(
2240                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2241                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2242         }
2243
2244         if (changed) {
2245                 u8 old_retry_short, old_retry_long;
2246                 u32 old_frag_threshold, old_rts_threshold;
2247                 u8 old_coverage_class;
2248
2249                 if (!rdev->ops->set_wiphy_params)
2250                         return -EOPNOTSUPP;
2251
2252                 old_retry_short = rdev->wiphy.retry_short;
2253                 old_retry_long = rdev->wiphy.retry_long;
2254                 old_frag_threshold = rdev->wiphy.frag_threshold;
2255                 old_rts_threshold = rdev->wiphy.rts_threshold;
2256                 old_coverage_class = rdev->wiphy.coverage_class;
2257
2258                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2259                         rdev->wiphy.retry_short = retry_short;
2260                 if (changed & WIPHY_PARAM_RETRY_LONG)
2261                         rdev->wiphy.retry_long = retry_long;
2262                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2263                         rdev->wiphy.frag_threshold = frag_threshold;
2264                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2265                         rdev->wiphy.rts_threshold = rts_threshold;
2266                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2267                         rdev->wiphy.coverage_class = coverage_class;
2268
2269                 result = rdev_set_wiphy_params(rdev, changed);
2270                 if (result) {
2271                         rdev->wiphy.retry_short = old_retry_short;
2272                         rdev->wiphy.retry_long = old_retry_long;
2273                         rdev->wiphy.frag_threshold = old_frag_threshold;
2274                         rdev->wiphy.rts_threshold = old_rts_threshold;
2275                         rdev->wiphy.coverage_class = old_coverage_class;
2276                 }
2277         }
2278         return 0;
2279 }
2280
2281 static inline u64 wdev_id(struct wireless_dev *wdev)
2282 {
2283         return (u64)wdev->identifier |
2284                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2285 }
2286
2287 static int nl80211_send_chandef(struct sk_buff *msg,
2288                                 const struct cfg80211_chan_def *chandef)
2289 {
2290         WARN_ON(!cfg80211_chandef_valid(chandef));
2291
2292         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2293                         chandef->chan->center_freq))
2294                 return -ENOBUFS;
2295         switch (chandef->width) {
2296         case NL80211_CHAN_WIDTH_20_NOHT:
2297         case NL80211_CHAN_WIDTH_20:
2298         case NL80211_CHAN_WIDTH_40:
2299                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2300                                 cfg80211_get_chandef_type(chandef)))
2301                         return -ENOBUFS;
2302                 break;
2303         default:
2304                 break;
2305         }
2306         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2307                 return -ENOBUFS;
2308         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2309                 return -ENOBUFS;
2310         if (chandef->center_freq2 &&
2311             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2312                 return -ENOBUFS;
2313         return 0;
2314 }
2315
2316 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2317                               struct cfg80211_registered_device *rdev,
2318                               struct wireless_dev *wdev)
2319 {
2320         struct net_device *dev = wdev->netdev;
2321         void *hdr;
2322
2323         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2324         if (!hdr)
2325                 return -1;
2326
2327         if (dev &&
2328             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2329              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2330                 goto nla_put_failure;
2331
2332         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2333             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2334             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2335             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2336             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2337                         rdev->devlist_generation ^
2338                         (cfg80211_rdev_list_generation << 2)))
2339                 goto nla_put_failure;
2340
2341         if (rdev->ops->get_channel) {
2342                 int ret;
2343                 struct cfg80211_chan_def chandef;
2344
2345                 ret = rdev_get_channel(rdev, wdev, &chandef);
2346                 if (ret == 0) {
2347                         if (nl80211_send_chandef(msg, &chandef))
2348                                 goto nla_put_failure;
2349                 }
2350         }
2351
2352         if (wdev->ssid_len) {
2353                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2354                         goto nla_put_failure;
2355         }
2356
2357         return genlmsg_end(msg, hdr);
2358
2359  nla_put_failure:
2360         genlmsg_cancel(msg, hdr);
2361         return -EMSGSIZE;
2362 }
2363
2364 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2365 {
2366         int wp_idx = 0;
2367         int if_idx = 0;
2368         int wp_start = cb->args[0];
2369         int if_start = cb->args[1];
2370         struct cfg80211_registered_device *rdev;
2371         struct wireless_dev *wdev;
2372
2373         rtnl_lock();
2374         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2375                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2376                         continue;
2377                 if (wp_idx < wp_start) {
2378                         wp_idx++;
2379                         continue;
2380                 }
2381                 if_idx = 0;
2382
2383                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2384                         if (if_idx < if_start) {
2385                                 if_idx++;
2386                                 continue;
2387                         }
2388                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2389                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2390                                                rdev, wdev) < 0) {
2391                                 goto out;
2392                         }
2393                         if_idx++;
2394                 }
2395
2396                 wp_idx++;
2397         }
2398  out:
2399         rtnl_unlock();
2400
2401         cb->args[0] = wp_idx;
2402         cb->args[1] = if_idx;
2403
2404         return skb->len;
2405 }
2406
2407 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2408 {
2409         struct sk_buff *msg;
2410         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2411         struct wireless_dev *wdev = info->user_ptr[1];
2412
2413         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2414         if (!msg)
2415                 return -ENOMEM;
2416
2417         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2418                                rdev, wdev) < 0) {
2419                 nlmsg_free(msg);
2420                 return -ENOBUFS;
2421         }
2422
2423         return genlmsg_reply(msg, info);
2424 }
2425
2426 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2427         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2428         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2429         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2430         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2431         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2432         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2433 };
2434
2435 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2436 {
2437         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2438         int flag;
2439
2440         *mntrflags = 0;
2441
2442         if (!nla)
2443                 return -EINVAL;
2444
2445         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2446                              nla, mntr_flags_policy))
2447                 return -EINVAL;
2448
2449         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2450                 if (flags[flag])
2451                         *mntrflags |= (1<<flag);
2452
2453         return 0;
2454 }
2455
2456 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2457                                struct net_device *netdev, u8 use_4addr,
2458                                enum nl80211_iftype iftype)
2459 {
2460         if (!use_4addr) {
2461                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2462                         return -EBUSY;
2463                 return 0;
2464         }
2465
2466         switch (iftype) {
2467         case NL80211_IFTYPE_AP_VLAN:
2468                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2469                         return 0;
2470                 break;
2471         case NL80211_IFTYPE_STATION:
2472                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2473                         return 0;
2474                 break;
2475         default:
2476                 break;
2477         }
2478
2479         return -EOPNOTSUPP;
2480 }
2481
2482 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2483 {
2484         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2485         struct vif_params params;
2486         int err;
2487         enum nl80211_iftype otype, ntype;
2488         struct net_device *dev = info->user_ptr[1];
2489         u32 _flags, *flags = NULL;
2490         bool change = false;
2491
2492         memset(&params, 0, sizeof(params));
2493
2494         otype = ntype = dev->ieee80211_ptr->iftype;
2495
2496         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2497                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2498                 if (otype != ntype)
2499                         change = true;
2500                 if (ntype > NL80211_IFTYPE_MAX)
2501                         return -EINVAL;
2502         }
2503
2504         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2505                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2506
2507                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2508                         return -EINVAL;
2509                 if (netif_running(dev))
2510                         return -EBUSY;
2511
2512                 wdev_lock(wdev);
2513                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2514                              IEEE80211_MAX_MESH_ID_LEN);
2515                 wdev->mesh_id_up_len =
2516                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2517                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2518                        wdev->mesh_id_up_len);
2519                 wdev_unlock(wdev);
2520         }
2521
2522         if (info->attrs[NL80211_ATTR_4ADDR]) {
2523                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2524                 change = true;
2525                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2526                 if (err)
2527                         return err;
2528         } else {
2529                 params.use_4addr = -1;
2530         }
2531
2532         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2533                 if (ntype != NL80211_IFTYPE_MONITOR)
2534                         return -EINVAL;
2535                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2536                                           &_flags);
2537                 if (err)
2538                         return err;
2539
2540                 flags = &_flags;
2541                 change = true;
2542         }
2543
2544         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2545             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2546                 return -EOPNOTSUPP;
2547
2548         if (change)
2549                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2550         else
2551                 err = 0;
2552
2553         if (!err && params.use_4addr != -1)
2554                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2555
2556         return err;
2557 }
2558
2559 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2560 {
2561         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2562         struct vif_params params;
2563         struct wireless_dev *wdev;
2564         struct sk_buff *msg;
2565         int err;
2566         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2567         u32 flags;
2568
2569         /* to avoid failing a new interface creation due to pending removal */
2570         cfg80211_destroy_ifaces(rdev);
2571
2572         memset(&params, 0, sizeof(params));
2573
2574         if (!info->attrs[NL80211_ATTR_IFNAME])
2575                 return -EINVAL;
2576
2577         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2578                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2579                 if (type > NL80211_IFTYPE_MAX)
2580                         return -EINVAL;
2581         }
2582
2583         if (!rdev->ops->add_virtual_intf ||
2584             !(rdev->wiphy.interface_modes & (1 << type)))
2585                 return -EOPNOTSUPP;
2586
2587         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2588                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2589                            ETH_ALEN);
2590                 if (!is_valid_ether_addr(params.macaddr))
2591                         return -EADDRNOTAVAIL;
2592         }
2593
2594         if (info->attrs[NL80211_ATTR_4ADDR]) {
2595                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2596                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2597                 if (err)
2598                         return err;
2599         }
2600
2601         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2602         if (!msg)
2603                 return -ENOMEM;
2604
2605         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2606                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2607                                   &flags);
2608
2609         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2610             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2611                 return -EOPNOTSUPP;
2612
2613         wdev = rdev_add_virtual_intf(rdev,
2614                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2615                                 type, err ? NULL : &flags, &params);
2616         if (IS_ERR(wdev)) {
2617                 nlmsg_free(msg);
2618                 return PTR_ERR(wdev);
2619         }
2620
2621         if (info->attrs[NL80211_ATTR_IFACE_SOCKET_OWNER])
2622                 wdev->owner_nlportid = info->snd_portid;
2623
2624         switch (type) {
2625         case NL80211_IFTYPE_MESH_POINT:
2626                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2627                         break;
2628                 wdev_lock(wdev);
2629                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2630                              IEEE80211_MAX_MESH_ID_LEN);
2631                 wdev->mesh_id_up_len =
2632                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2633                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2634                        wdev->mesh_id_up_len);
2635                 wdev_unlock(wdev);
2636                 break;
2637         case NL80211_IFTYPE_P2P_DEVICE:
2638                 /*
2639                  * P2P Device doesn't have a netdev, so doesn't go
2640                  * through the netdev notifier and must be added here
2641                  */
2642                 mutex_init(&wdev->mtx);
2643                 INIT_LIST_HEAD(&wdev->event_list);
2644                 spin_lock_init(&wdev->event_lock);
2645                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2646                 spin_lock_init(&wdev->mgmt_registrations_lock);
2647
2648                 wdev->identifier = ++rdev->wdev_id;
2649                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2650                 rdev->devlist_generation++;
2651                 break;
2652         default:
2653                 break;
2654         }
2655
2656         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2657                                rdev, wdev) < 0) {
2658                 nlmsg_free(msg);
2659                 return -ENOBUFS;
2660         }
2661
2662         return genlmsg_reply(msg, info);
2663 }
2664
2665 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2666 {
2667         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2668         struct wireless_dev *wdev = info->user_ptr[1];
2669
2670         if (!rdev->ops->del_virtual_intf)
2671                 return -EOPNOTSUPP;
2672
2673         /*
2674          * If we remove a wireless device without a netdev then clear
2675          * user_ptr[1] so that nl80211_post_doit won't dereference it
2676          * to check if it needs to do dev_put(). Otherwise it crashes
2677          * since the wdev has been freed, unlike with a netdev where
2678          * we need the dev_put() for the netdev to really be freed.
2679          */
2680         if (!wdev->netdev)
2681                 info->user_ptr[1] = NULL;
2682
2683         return rdev_del_virtual_intf(rdev, wdev);
2684 }
2685
2686 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2687 {
2688         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2689         struct net_device *dev = info->user_ptr[1];
2690         u16 noack_map;
2691
2692         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2693                 return -EINVAL;
2694
2695         if (!rdev->ops->set_noack_map)
2696                 return -EOPNOTSUPP;
2697
2698         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2699
2700         return rdev_set_noack_map(rdev, dev, noack_map);
2701 }
2702
2703 struct get_key_cookie {
2704         struct sk_buff *msg;
2705         int error;
2706         int idx;
2707 };
2708
2709 static void get_key_callback(void *c, struct key_params *params)
2710 {
2711         struct nlattr *key;
2712         struct get_key_cookie *cookie = c;
2713
2714         if ((params->key &&
2715              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2716                      params->key_len, params->key)) ||
2717             (params->seq &&
2718              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2719                      params->seq_len, params->seq)) ||
2720             (params->cipher &&
2721              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2722                          params->cipher)))
2723                 goto nla_put_failure;
2724
2725         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2726         if (!key)
2727                 goto nla_put_failure;
2728
2729         if ((params->key &&
2730              nla_put(cookie->msg, NL80211_KEY_DATA,
2731                      params->key_len, params->key)) ||
2732             (params->seq &&
2733              nla_put(cookie->msg, NL80211_KEY_SEQ,
2734                      params->seq_len, params->seq)) ||
2735             (params->cipher &&
2736              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2737                          params->cipher)))
2738                 goto nla_put_failure;
2739
2740         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2741                 goto nla_put_failure;
2742
2743         nla_nest_end(cookie->msg, key);
2744
2745         return;
2746  nla_put_failure:
2747         cookie->error = 1;
2748 }
2749
2750 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2751 {
2752         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2753         int err;
2754         struct net_device *dev = info->user_ptr[1];
2755         u8 key_idx = 0;
2756         const u8 *mac_addr = NULL;
2757         bool pairwise;
2758         struct get_key_cookie cookie = {
2759                 .error = 0,
2760         };
2761         void *hdr;
2762         struct sk_buff *msg;
2763
2764         if (info->attrs[NL80211_ATTR_KEY_IDX])
2765                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2766
2767         if (key_idx > 5)
2768                 return -EINVAL;
2769
2770         if (info->attrs[NL80211_ATTR_MAC])
2771                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2772
2773         pairwise = !!mac_addr;
2774         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2775                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2776                 if (kt >= NUM_NL80211_KEYTYPES)
2777                         return -EINVAL;
2778                 if (kt != NL80211_KEYTYPE_GROUP &&
2779                     kt != NL80211_KEYTYPE_PAIRWISE)
2780                         return -EINVAL;
2781                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2782         }
2783
2784         if (!rdev->ops->get_key)
2785                 return -EOPNOTSUPP;
2786
2787         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2788         if (!msg)
2789                 return -ENOMEM;
2790
2791         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2792                              NL80211_CMD_NEW_KEY);
2793         if (!hdr)
2794                 goto nla_put_failure;
2795
2796         cookie.msg = msg;
2797         cookie.idx = key_idx;
2798
2799         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2800             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2801                 goto nla_put_failure;
2802         if (mac_addr &&
2803             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2804                 goto nla_put_failure;
2805
2806         if (pairwise && mac_addr &&
2807             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2808                 return -ENOENT;
2809
2810         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2811                            get_key_callback);
2812
2813         if (err)
2814                 goto free_msg;
2815
2816         if (cookie.error)
2817                 goto nla_put_failure;
2818
2819         genlmsg_end(msg, hdr);
2820         return genlmsg_reply(msg, info);
2821
2822  nla_put_failure:
2823         err = -ENOBUFS;
2824  free_msg:
2825         nlmsg_free(msg);
2826         return err;
2827 }
2828
2829 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2830 {
2831         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2832         struct key_parse key;
2833         int err;
2834         struct net_device *dev = info->user_ptr[1];
2835
2836         err = nl80211_parse_key(info, &key);
2837         if (err)
2838                 return err;
2839
2840         if (key.idx < 0)
2841                 return -EINVAL;
2842
2843         /* only support setting default key */
2844         if (!key.def && !key.defmgmt)
2845                 return -EINVAL;
2846
2847         wdev_lock(dev->ieee80211_ptr);
2848
2849         if (key.def) {
2850                 if (!rdev->ops->set_default_key) {
2851                         err = -EOPNOTSUPP;
2852                         goto out;
2853                 }
2854
2855                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2856                 if (err)
2857                         goto out;
2858
2859                 err = rdev_set_default_key(rdev, dev, key.idx,
2860                                                  key.def_uni, key.def_multi);
2861
2862                 if (err)
2863                         goto out;
2864
2865 #ifdef CONFIG_CFG80211_WEXT
2866                 dev->ieee80211_ptr->wext.default_key = key.idx;
2867 #endif
2868         } else {
2869                 if (key.def_uni || !key.def_multi) {
2870                         err = -EINVAL;
2871                         goto out;
2872                 }
2873
2874                 if (!rdev->ops->set_default_mgmt_key) {
2875                         err = -EOPNOTSUPP;
2876                         goto out;
2877                 }
2878
2879                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2880                 if (err)
2881                         goto out;
2882
2883                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2884                 if (err)
2885                         goto out;
2886
2887 #ifdef CONFIG_CFG80211_WEXT
2888                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2889 #endif
2890         }
2891
2892  out:
2893         wdev_unlock(dev->ieee80211_ptr);
2894
2895         return err;
2896 }
2897
2898 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2899 {
2900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2901         int err;
2902         struct net_device *dev = info->user_ptr[1];
2903         struct key_parse key;
2904         const u8 *mac_addr = NULL;
2905
2906         err = nl80211_parse_key(info, &key);
2907         if (err)
2908                 return err;
2909
2910         if (!key.p.key)
2911                 return -EINVAL;
2912
2913         if (info->attrs[NL80211_ATTR_MAC])
2914                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2915
2916         if (key.type == -1) {
2917                 if (mac_addr)
2918                         key.type = NL80211_KEYTYPE_PAIRWISE;
2919                 else
2920                         key.type = NL80211_KEYTYPE_GROUP;
2921         }
2922
2923         /* for now */
2924         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2925             key.type != NL80211_KEYTYPE_GROUP)
2926                 return -EINVAL;
2927
2928         if (!rdev->ops->add_key)
2929                 return -EOPNOTSUPP;
2930
2931         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2932                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2933                                            mac_addr))
2934                 return -EINVAL;
2935
2936         wdev_lock(dev->ieee80211_ptr);
2937         err = nl80211_key_allowed(dev->ieee80211_ptr);
2938         if (!err)
2939                 err = rdev_add_key(rdev, dev, key.idx,
2940                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2941                                     mac_addr, &key.p);
2942         wdev_unlock(dev->ieee80211_ptr);
2943
2944         return err;
2945 }
2946
2947 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2948 {
2949         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2950         int err;
2951         struct net_device *dev = info->user_ptr[1];
2952         u8 *mac_addr = NULL;
2953         struct key_parse key;
2954
2955         err = nl80211_parse_key(info, &key);
2956         if (err)
2957                 return err;
2958
2959         if (info->attrs[NL80211_ATTR_MAC])
2960                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2961
2962         if (key.type == -1) {
2963                 if (mac_addr)
2964                         key.type = NL80211_KEYTYPE_PAIRWISE;
2965                 else
2966                         key.type = NL80211_KEYTYPE_GROUP;
2967         }
2968
2969         /* for now */
2970         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2971             key.type != NL80211_KEYTYPE_GROUP)
2972                 return -EINVAL;
2973
2974         if (!rdev->ops->del_key)
2975                 return -EOPNOTSUPP;
2976
2977         wdev_lock(dev->ieee80211_ptr);
2978         err = nl80211_key_allowed(dev->ieee80211_ptr);
2979
2980         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2981             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2982                 err = -ENOENT;
2983
2984         if (!err)
2985                 err = rdev_del_key(rdev, dev, key.idx,
2986                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2987                                    mac_addr);
2988
2989 #ifdef CONFIG_CFG80211_WEXT
2990         if (!err) {
2991                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2992                         dev->ieee80211_ptr->wext.default_key = -1;
2993                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2994                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2995         }
2996 #endif
2997         wdev_unlock(dev->ieee80211_ptr);
2998
2999         return err;
3000 }
3001
3002 /* This function returns an error or the number of nested attributes */
3003 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3004 {
3005         struct nlattr *attr;
3006         int n_entries = 0, tmp;
3007
3008         nla_for_each_nested(attr, nl_attr, tmp) {
3009                 if (nla_len(attr) != ETH_ALEN)
3010                         return -EINVAL;
3011
3012                 n_entries++;
3013         }
3014
3015         return n_entries;
3016 }
3017
3018 /*
3019  * This function parses ACL information and allocates memory for ACL data.
3020  * On successful return, the calling function is responsible to free the
3021  * ACL buffer returned by this function.
3022  */
3023 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3024                                                 struct genl_info *info)
3025 {
3026         enum nl80211_acl_policy acl_policy;
3027         struct nlattr *attr;
3028         struct cfg80211_acl_data *acl;
3029         int i = 0, n_entries, tmp;
3030
3031         if (!wiphy->max_acl_mac_addrs)
3032                 return ERR_PTR(-EOPNOTSUPP);
3033
3034         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3035                 return ERR_PTR(-EINVAL);
3036
3037         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3038         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3039             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3040                 return ERR_PTR(-EINVAL);
3041
3042         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3043                 return ERR_PTR(-EINVAL);
3044
3045         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3046         if (n_entries < 0)
3047                 return ERR_PTR(n_entries);
3048
3049         if (n_entries > wiphy->max_acl_mac_addrs)
3050                 return ERR_PTR(-ENOTSUPP);
3051
3052         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3053                       GFP_KERNEL);
3054         if (!acl)
3055                 return ERR_PTR(-ENOMEM);
3056
3057         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3058                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3059                 i++;
3060         }
3061
3062         acl->n_acl_entries = n_entries;
3063         acl->acl_policy = acl_policy;
3064
3065         return acl;
3066 }
3067
3068 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3069 {
3070         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3071         struct net_device *dev = info->user_ptr[1];
3072         struct cfg80211_acl_data *acl;
3073         int err;
3074
3075         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3076             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3077                 return -EOPNOTSUPP;
3078
3079         if (!dev->ieee80211_ptr->beacon_interval)
3080                 return -EINVAL;
3081
3082         acl = parse_acl_data(&rdev->wiphy, info);
3083         if (IS_ERR(acl))
3084                 return PTR_ERR(acl);
3085
3086         err = rdev_set_mac_acl(rdev, dev, acl);
3087
3088         kfree(acl);
3089
3090         return err;
3091 }
3092
3093 static int nl80211_parse_beacon(struct nlattr *attrs[],
3094                                 struct cfg80211_beacon_data *bcn)
3095 {
3096         bool haveinfo = false;
3097
3098         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3099             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3100             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3101             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3102                 return -EINVAL;
3103
3104         memset(bcn, 0, sizeof(*bcn));
3105
3106         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3107                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3108                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3109                 if (!bcn->head_len)
3110                         return -EINVAL;
3111                 haveinfo = true;
3112         }
3113
3114         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3115                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3116                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3117                 haveinfo = true;
3118         }
3119
3120         if (!haveinfo)
3121                 return -EINVAL;
3122
3123         if (attrs[NL80211_ATTR_IE]) {
3124                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3125                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3126         }
3127
3128         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3129                 bcn->proberesp_ies =
3130                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3131                 bcn->proberesp_ies_len =
3132                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3133         }
3134
3135         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3136                 bcn->assocresp_ies =
3137                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3138                 bcn->assocresp_ies_len =
3139                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3140         }
3141
3142         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3143                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3144                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3145         }
3146
3147         return 0;
3148 }
3149
3150 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3151                                    struct cfg80211_ap_settings *params)
3152 {
3153         struct wireless_dev *wdev;
3154         bool ret = false;
3155
3156         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3157                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3158                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3159                         continue;
3160
3161                 if (!wdev->preset_chandef.chan)
3162                         continue;
3163
3164                 params->chandef = wdev->preset_chandef;
3165                 ret = true;
3166                 break;
3167         }
3168
3169         return ret;
3170 }
3171
3172 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3173                                     enum nl80211_auth_type auth_type,
3174                                     enum nl80211_commands cmd)
3175 {
3176         if (auth_type > NL80211_AUTHTYPE_MAX)
3177                 return false;
3178
3179         switch (cmd) {
3180         case NL80211_CMD_AUTHENTICATE:
3181                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3182                     auth_type == NL80211_AUTHTYPE_SAE)
3183                         return false;
3184                 return true;
3185         case NL80211_CMD_CONNECT:
3186         case NL80211_CMD_START_AP:
3187                 /* SAE not supported yet */
3188                 if (auth_type == NL80211_AUTHTYPE_SAE)
3189                         return false;
3190                 return true;
3191         default:
3192                 return false;
3193         }
3194 }
3195
3196 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3197 {
3198         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3199         struct net_device *dev = info->user_ptr[1];
3200         struct wireless_dev *wdev = dev->ieee80211_ptr;
3201         struct cfg80211_ap_settings params;
3202         int err;
3203
3204         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3205             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3206                 return -EOPNOTSUPP;
3207
3208         if (!rdev->ops->start_ap)
3209                 return -EOPNOTSUPP;
3210
3211         if (wdev->beacon_interval)
3212                 return -EALREADY;
3213
3214         memset(&params, 0, sizeof(params));
3215
3216         /* these are required for START_AP */
3217         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3218             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3219             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3220                 return -EINVAL;
3221
3222         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3223         if (err)
3224                 return err;
3225
3226         params.beacon_interval =
3227                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3228         params.dtim_period =
3229                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3230
3231         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3232         if (err)
3233                 return err;
3234
3235         /*
3236          * In theory, some of these attributes should be required here
3237          * but since they were not used when the command was originally
3238          * added, keep them optional for old user space programs to let
3239          * them continue to work with drivers that do not need the
3240          * additional information -- drivers must check!
3241          */
3242         if (info->attrs[NL80211_ATTR_SSID]) {
3243                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3244                 params.ssid_len =
3245                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3246                 if (params.ssid_len == 0 ||
3247                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3248                         return -EINVAL;
3249         }
3250
3251         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3252                 params.hidden_ssid = nla_get_u32(
3253                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3254                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3255                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3256                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3257                         return -EINVAL;
3258         }
3259
3260         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3261
3262         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3263                 params.auth_type = nla_get_u32(
3264                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3265                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3266                                              NL80211_CMD_START_AP))
3267                         return -EINVAL;
3268         } else
3269                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3270
3271         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3272                                       NL80211_MAX_NR_CIPHER_SUITES);
3273         if (err)
3274                 return err;
3275
3276         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3277                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3278                         return -EOPNOTSUPP;
3279                 params.inactivity_timeout = nla_get_u16(
3280                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3281         }
3282
3283         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3284                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3285                         return -EINVAL;
3286                 params.p2p_ctwindow =
3287                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3288                 if (params.p2p_ctwindow > 127)
3289                         return -EINVAL;
3290                 if (params.p2p_ctwindow != 0 &&
3291                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3292                         return -EINVAL;
3293         }
3294
3295         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3296                 u8 tmp;
3297
3298                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3299                         return -EINVAL;
3300                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3301                 if (tmp > 1)
3302                         return -EINVAL;
3303                 params.p2p_opp_ps = tmp;
3304                 if (params.p2p_opp_ps != 0 &&
3305                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3306                         return -EINVAL;
3307         }
3308
3309         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3310                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3311                 if (err)
3312                         return err;
3313         } else if (wdev->preset_chandef.chan) {
3314                 params.chandef = wdev->preset_chandef;
3315         } else if (!nl80211_get_ap_channel(rdev, &params))
3316                 return -EINVAL;
3317
3318         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
3319                                      wdev->iftype))
3320                 return -EINVAL;
3321
3322         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3323                 params.acl = parse_acl_data(&rdev->wiphy, info);
3324                 if (IS_ERR(params.acl))
3325                         return PTR_ERR(params.acl);
3326         }
3327
3328         wdev_lock(wdev);
3329         err = rdev_start_ap(rdev, dev, &params);
3330         if (!err) {
3331                 wdev->preset_chandef = params.chandef;
3332                 wdev->beacon_interval = params.beacon_interval;
3333                 wdev->chandef = params.chandef;
3334                 wdev->ssid_len = params.ssid_len;
3335                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3336         }
3337         wdev_unlock(wdev);
3338
3339         kfree(params.acl);
3340
3341         return err;
3342 }
3343
3344 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3345 {
3346         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3347         struct net_device *dev = info->user_ptr[1];
3348         struct wireless_dev *wdev = dev->ieee80211_ptr;
3349         struct cfg80211_beacon_data params;
3350         int err;
3351
3352         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3353             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3354                 return -EOPNOTSUPP;
3355
3356         if (!rdev->ops->change_beacon)
3357                 return -EOPNOTSUPP;
3358
3359         if (!wdev->beacon_interval)
3360                 return -EINVAL;
3361
3362         err = nl80211_parse_beacon(info->attrs, &params);
3363         if (err)
3364                 return err;
3365
3366         wdev_lock(wdev);
3367         err = rdev_change_beacon(rdev, dev, &params);
3368         wdev_unlock(wdev);
3369
3370         return err;
3371 }
3372
3373 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3374 {
3375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3376         struct net_device *dev = info->user_ptr[1];
3377
3378         return cfg80211_stop_ap(rdev, dev, false);
3379 }
3380
3381 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3382         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3383         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3384         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3385         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3386         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3387         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3388 };
3389
3390 static int parse_station_flags(struct genl_info *info,
3391                                enum nl80211_iftype iftype,
3392                                struct station_parameters *params)
3393 {
3394         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3395         struct nlattr *nla;
3396         int flag;
3397
3398         /*
3399          * Try parsing the new attribute first so userspace
3400          * can specify both for older kernels.
3401          */
3402         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3403         if (nla) {
3404                 struct nl80211_sta_flag_update *sta_flags;
3405
3406                 sta_flags = nla_data(nla);
3407                 params->sta_flags_mask = sta_flags->mask;
3408                 params->sta_flags_set = sta_flags->set;
3409                 params->sta_flags_set &= params->sta_flags_mask;
3410                 if ((params->sta_flags_mask |
3411                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3412                         return -EINVAL;
3413                 return 0;
3414         }
3415
3416         /* if present, parse the old attribute */
3417
3418         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3419         if (!nla)
3420                 return 0;
3421
3422         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3423                              nla, sta_flags_policy))
3424                 return -EINVAL;
3425
3426         /*
3427          * Only allow certain flags for interface types so that
3428          * other attributes are silently ignored. Remember that
3429          * this is backward compatibility code with old userspace
3430          * and shouldn't be hit in other cases anyway.
3431          */
3432         switch (iftype) {
3433         case NL80211_IFTYPE_AP:
3434         case NL80211_IFTYPE_AP_VLAN:
3435         case NL80211_IFTYPE_P2P_GO:
3436                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3437                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3438                                          BIT(NL80211_STA_FLAG_WME) |
3439                                          BIT(NL80211_STA_FLAG_MFP);
3440                 break;
3441         case NL80211_IFTYPE_P2P_CLIENT:
3442         case NL80211_IFTYPE_STATION:
3443                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3444                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3445                 break;
3446         case NL80211_IFTYPE_MESH_POINT:
3447                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3448                                          BIT(NL80211_STA_FLAG_MFP) |
3449                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3450         default:
3451                 return -EINVAL;
3452         }
3453
3454         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3455                 if (flags[flag]) {
3456                         params->sta_flags_set |= (1<<flag);
3457
3458                         /* no longer support new API additions in old API */
3459                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3460                                 return -EINVAL;
3461                 }
3462         }
3463
3464         return 0;
3465 }
3466
3467 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3468                                  int attr)
3469 {
3470         struct nlattr *rate;
3471         u32 bitrate;
3472         u16 bitrate_compat;
3473
3474         rate = nla_nest_start(msg, attr);
3475         if (!rate)
3476                 return false;
3477
3478         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3479         bitrate = cfg80211_calculate_bitrate(info);
3480         /* report 16-bit bitrate only if we can */
3481         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3482         if (bitrate > 0 &&
3483             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3484                 return false;
3485         if (bitrate_compat > 0 &&
3486             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3487                 return false;
3488
3489         if (info->flags & RATE_INFO_FLAGS_MCS) {
3490                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3491                         return false;
3492                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3493                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3494                         return false;
3495                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3496                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3497                         return false;
3498         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3499                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3500                         return false;
3501                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3502                         return false;
3503                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3504                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3505                         return false;
3506                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3507                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3508                         return false;
3509                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3510                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3511                         return false;
3512                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3513                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3514                         return false;
3515                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3516                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3517                         return false;
3518         }
3519
3520         nla_nest_end(msg, rate);
3521         return true;
3522 }
3523
3524 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3525                                int id)
3526 {
3527         void *attr;
3528         int i = 0;
3529
3530         if (!mask)
3531                 return true;
3532
3533         attr = nla_nest_start(msg, id);
3534         if (!attr)
3535                 return false;
3536
3537         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3538                 if (!(mask & BIT(i)))
3539                         continue;
3540
3541                 if (nla_put_u8(msg, i, signal[i]))
3542                         return false;
3543         }
3544
3545         nla_nest_end(msg, attr);
3546
3547         return true;
3548 }
3549
3550 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3551                                 int flags,
3552                                 struct cfg80211_registered_device *rdev,
3553                                 struct net_device *dev,
3554                                 const u8 *mac_addr, struct station_info *sinfo)
3555 {
3556         void *hdr;
3557         struct nlattr *sinfoattr, *bss_param;
3558
3559         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3560         if (!hdr)
3561                 return -1;
3562
3563         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3564             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3565             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3566                 goto nla_put_failure;
3567
3568         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3569         if (!sinfoattr)
3570                 goto nla_put_failure;
3571         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3572             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3573                         sinfo->connected_time))
3574                 goto nla_put_failure;
3575         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3576             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3577                         sinfo->inactive_time))
3578                 goto nla_put_failure;
3579         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3580                               STATION_INFO_RX_BYTES64)) &&
3581             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3582                         (u32)sinfo->rx_bytes))
3583                 goto nla_put_failure;
3584         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3585                               STATION_INFO_TX_BYTES64)) &&
3586             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3587                         (u32)sinfo->tx_bytes))
3588                 goto nla_put_failure;
3589         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3590             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3591                         sinfo->rx_bytes))
3592                 goto nla_put_failure;
3593         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3594             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3595                         sinfo->tx_bytes))
3596                 goto nla_put_failure;
3597         if ((sinfo->filled & STATION_INFO_LLID) &&
3598             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3599                 goto nla_put_failure;
3600         if ((sinfo->filled & STATION_INFO_PLID) &&
3601             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3602                 goto nla_put_failure;
3603         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3604             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3605                        sinfo->plink_state))
3606                 goto nla_put_failure;
3607         switch (rdev->wiphy.signal_type) {
3608         case CFG80211_SIGNAL_TYPE_MBM:
3609                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3610                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3611                                sinfo->signal))
3612                         goto nla_put_failure;
3613                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3614                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3615                                sinfo->signal_avg))
3616                         goto nla_put_failure;
3617                 break;
3618         default:
3619                 break;
3620         }
3621         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3622                 if (!nl80211_put_signal(msg, sinfo->chains,
3623                                         sinfo->chain_signal,
3624                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3625                         goto nla_put_failure;
3626         }
3627         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3628                 if (!nl80211_put_signal(msg, sinfo->chains,
3629                                         sinfo->chain_signal_avg,
3630                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3631                         goto nla_put_failure;
3632         }
3633         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3634                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3635                                           NL80211_STA_INFO_TX_BITRATE))
3636                         goto nla_put_failure;
3637         }
3638         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3639                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3640                                           NL80211_STA_INFO_RX_BITRATE))
3641                         goto nla_put_failure;
3642         }
3643         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3644             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3645                         sinfo->rx_packets))
3646                 goto nla_put_failure;
3647         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3648             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3649                         sinfo->tx_packets))
3650                 goto nla_put_failure;
3651         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3652             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3653                         sinfo->tx_retries))
3654                 goto nla_put_failure;
3655         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3656             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3657                         sinfo->tx_failed))
3658                 goto nla_put_failure;
3659         if ((sinfo->filled & STATION_INFO_EXPECTED_THROUGHPUT) &&
3660             nla_put_u32(msg, NL80211_STA_INFO_EXPECTED_THROUGHPUT,
3661                         sinfo->expected_throughput))
3662                 goto nla_put_failure;
3663         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3664             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3665                         sinfo->beacon_loss_count))
3666                 goto nla_put_failure;
3667         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3668             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3669                         sinfo->local_pm))
3670                 goto nla_put_failure;
3671         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3672             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3673                         sinfo->peer_pm))
3674                 goto nla_put_failure;
3675         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3676             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3677                         sinfo->nonpeer_pm))
3678                 goto nla_put_failure;
3679         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3680                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3681                 if (!bss_param)
3682                         goto nla_put_failure;
3683
3684                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3685                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3686                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3687                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3688                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3689                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3690                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3691                                sinfo->bss_param.dtim_period) ||
3692                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3693                                 sinfo->bss_param.beacon_interval))
3694                         goto nla_put_failure;
3695
3696                 nla_nest_end(msg, bss_param);
3697         }
3698         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3699             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3700                     sizeof(struct nl80211_sta_flag_update),
3701                     &sinfo->sta_flags))
3702                 goto nla_put_failure;
3703         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3704                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3705                             sinfo->t_offset))
3706                 goto nla_put_failure;
3707         nla_nest_end(msg, sinfoattr);
3708
3709         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3710             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3711                     sinfo->assoc_req_ies))
3712                 goto nla_put_failure;
3713
3714         return genlmsg_end(msg, hdr);
3715
3716  nla_put_failure:
3717         genlmsg_cancel(msg, hdr);
3718         return -EMSGSIZE;
3719 }
3720
3721 static int nl80211_dump_station(struct sk_buff *skb,
3722                                 struct netlink_callback *cb)
3723 {
3724         struct station_info sinfo;
3725         struct cfg80211_registered_device *rdev;
3726         struct wireless_dev *wdev;
3727         u8 mac_addr[ETH_ALEN];
3728         int sta_idx = cb->args[2];
3729         int err;
3730
3731         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3732         if (err)
3733                 return err;
3734
3735         if (!wdev->netdev) {
3736                 err = -EINVAL;
3737                 goto out_err;
3738         }
3739
3740         if (!rdev->ops->dump_station) {
3741                 err = -EOPNOTSUPP;
3742                 goto out_err;
3743         }
3744
3745         while (1) {
3746                 memset(&sinfo, 0, sizeof(sinfo));
3747                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3748                                         mac_addr, &sinfo);
3749                 if (err == -ENOENT)
3750                         break;
3751                 if (err)
3752                         goto out_err;
3753
3754                 if (nl80211_send_station(skb,
3755                                 NETLINK_CB(cb->skb).portid,
3756                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3757                                 rdev, wdev->netdev, mac_addr,
3758                                 &sinfo) < 0)
3759                         goto out;
3760
3761                 sta_idx++;
3762         }
3763
3764
3765  out:
3766         cb->args[2] = sta_idx;
3767         err = skb->len;
3768  out_err:
3769         nl80211_finish_wdev_dump(rdev);
3770
3771         return err;
3772 }
3773
3774 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3775 {
3776         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3777         struct net_device *dev = info->user_ptr[1];
3778         struct station_info sinfo;
3779         struct sk_buff *msg;
3780         u8 *mac_addr = NULL;
3781         int err;
3782
3783         memset(&sinfo, 0, sizeof(sinfo));
3784
3785         if (!info->attrs[NL80211_ATTR_MAC])
3786                 return -EINVAL;
3787
3788         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3789
3790         if (!rdev->ops->get_station)
3791                 return -EOPNOTSUPP;
3792
3793         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3794         if (err)
3795                 return err;
3796
3797         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3798         if (!msg)
3799                 return -ENOMEM;
3800
3801         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3802                                  rdev, dev, mac_addr, &sinfo) < 0) {
3803                 nlmsg_free(msg);
3804                 return -ENOBUFS;
3805         }
3806
3807         return genlmsg_reply(msg, info);
3808 }
3809
3810 int cfg80211_check_station_change(struct wiphy *wiphy,
3811                                   struct station_parameters *params,
3812                                   enum cfg80211_station_type statype)
3813 {
3814         if (params->listen_interval != -1)
3815                 return -EINVAL;
3816         if (params->aid)
3817                 return -EINVAL;
3818
3819         /* When you run into this, adjust the code below for the new flag */
3820         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3821
3822         switch (statype) {
3823         case CFG80211_STA_MESH_PEER_KERNEL:
3824         case CFG80211_STA_MESH_PEER_USER:
3825                 /*
3826                  * No ignoring the TDLS flag here -- the userspace mesh
3827                  * code doesn't have the bug of including TDLS in the
3828                  * mask everywhere.
3829                  */
3830                 if (params->sta_flags_mask &
3831                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3832                                   BIT(NL80211_STA_FLAG_MFP) |
3833                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3834                         return -EINVAL;
3835                 break;
3836         case CFG80211_STA_TDLS_PEER_SETUP:
3837         case CFG80211_STA_TDLS_PEER_ACTIVE:
3838                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3839                         return -EINVAL;
3840                 /* ignore since it can't change */
3841                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3842                 break;
3843         default:
3844                 /* disallow mesh-specific things */
3845                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3846                         return -EINVAL;
3847                 if (params->local_pm)
3848                         return -EINVAL;
3849                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3850                         return -EINVAL;
3851         }
3852
3853         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3854             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3855                 /* TDLS can't be set, ... */
3856                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3857                         return -EINVAL;
3858                 /*
3859                  * ... but don't bother the driver with it. This works around
3860                  * a hostapd/wpa_supplicant issue -- it always includes the
3861                  * TLDS_PEER flag in the mask even for AP mode.
3862                  */
3863                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3864         }
3865
3866         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3867                 /* reject other things that can't change */
3868                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3869                         return -EINVAL;
3870                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3871                         return -EINVAL;
3872                 if (params->supported_rates)
3873                         return -EINVAL;
3874                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3875                         return -EINVAL;
3876         }
3877
3878         if (statype != CFG80211_STA_AP_CLIENT) {
3879                 if (params->vlan)
3880                         return -EINVAL;
3881         }
3882
3883         switch (statype) {
3884         case CFG80211_STA_AP_MLME_CLIENT:
3885                 /* Use this only for authorizing/unauthorizing a station */
3886                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3887                         return -EOPNOTSUPP;
3888                 break;
3889         case CFG80211_STA_AP_CLIENT:
3890                 /* accept only the listed bits */
3891                 if (params->sta_flags_mask &
3892                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3893                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3894                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3895                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3896                                   BIT(NL80211_STA_FLAG_WME) |
3897                                   BIT(NL80211_STA_FLAG_MFP)))
3898                         return -EINVAL;
3899
3900                 /* but authenticated/associated only if driver handles it */
3901                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3902                     params->sta_flags_mask &
3903                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3904                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3905                         return -EINVAL;
3906                 break;
3907         case CFG80211_STA_IBSS:
3908         case CFG80211_STA_AP_STA:
3909                 /* reject any changes other than AUTHORIZED */
3910                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3911                         return -EINVAL;
3912                 break;
3913         case CFG80211_STA_TDLS_PEER_SETUP:
3914                 /* reject any changes other than AUTHORIZED or WME */
3915                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3916                                                BIT(NL80211_STA_FLAG_WME)))
3917                         return -EINVAL;
3918                 /* force (at least) rates when authorizing */
3919                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3920                     !params->supported_rates)
3921                         return -EINVAL;
3922                 break;
3923         case CFG80211_STA_TDLS_PEER_ACTIVE:
3924                 /* reject any changes */
3925                 return -EINVAL;
3926         case CFG80211_STA_MESH_PEER_KERNEL:
3927                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3928                         return -EINVAL;
3929                 break;
3930         case CFG80211_STA_MESH_PEER_USER:
3931                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3932                         return -EINVAL;
3933                 break;
3934         }
3935
3936         return 0;
3937 }
3938 EXPORT_SYMBOL(cfg80211_check_station_change);
3939
3940 /*
3941  * Get vlan interface making sure it is running and on the right wiphy.
3942  */
3943 static struct net_device *get_vlan(struct genl_info *info,
3944                                    struct cfg80211_registered_device *rdev)
3945 {
3946         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3947         struct net_device *v;
3948         int ret;
3949
3950         if (!vlanattr)
3951                 return NULL;
3952
3953         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3954         if (!v)
3955                 return ERR_PTR(-ENODEV);
3956
3957         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3958                 ret = -EINVAL;
3959                 goto error;
3960         }
3961
3962         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3963             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3964             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3965                 ret = -EINVAL;
3966                 goto error;
3967         }
3968
3969         if (!netif_running(v)) {
3970                 ret = -ENETDOWN;
3971                 goto error;
3972         }
3973
3974         return v;
3975  error:
3976         dev_put(v);
3977         return ERR_PTR(ret);
3978 }
3979
3980 static const struct nla_policy
3981 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
3982         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3983         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3984 };
3985
3986 static int nl80211_parse_sta_wme(struct genl_info *info,
3987                                  struct station_parameters *params)
3988 {
3989         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3990         struct nlattr *nla;
3991         int err;
3992
3993         /* parse WME attributes if present */
3994         if (!info->attrs[NL80211_ATTR_STA_WME])
3995                 return 0;
3996
3997         nla = info->attrs[NL80211_ATTR_STA_WME];
3998         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3999                                nl80211_sta_wme_policy);
4000         if (err)
4001                 return err;
4002
4003         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4004                 params->uapsd_queues = nla_get_u8(
4005                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4006         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4007                 return -EINVAL;
4008
4009         if (tb[NL80211_STA_WME_MAX_SP])
4010                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4011
4012         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4013                 return -EINVAL;
4014
4015         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4016
4017         return 0;
4018 }
4019
4020 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4021                                       struct station_parameters *params)
4022 {
4023         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4024                 params->supported_channels =
4025                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4026                 params->supported_channels_len =
4027                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4028                 /*
4029                  * Need to include at least one (first channel, number of
4030                  * channels) tuple for each subband, and must have proper
4031                  * tuples for the rest of the data as well.
4032                  */
4033                 if (params->supported_channels_len < 2)
4034                         return -EINVAL;
4035                 if (params->supported_channels_len % 2)
4036                         return -EINVAL;
4037         }
4038
4039         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4040                 params->supported_oper_classes =
4041                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4042                 params->supported_oper_classes_len =
4043                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4044                 /*
4045                  * The value of the Length field of the Supported Operating
4046                  * Classes element is between 2 and 253.
4047                  */
4048                 if (params->supported_oper_classes_len < 2 ||
4049                     params->supported_oper_classes_len > 253)
4050                         return -EINVAL;
4051         }
4052         return 0;
4053 }
4054
4055 static int nl80211_set_station_tdls(struct genl_info *info,
4056                                     struct station_parameters *params)
4057 {
4058         int err;
4059         /* Dummy STA entry gets updated once the peer capabilities are known */
4060         if (info->attrs[NL80211_ATTR_PEER_AID])
4061                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4062         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4063                 params->ht_capa =
4064                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4065         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4066                 params->vht_capa =
4067                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4068
4069         err = nl80211_parse_sta_channel_info(info, params);
4070         if (err)
4071                 return err;
4072
4073         return nl80211_parse_sta_wme(info, params);
4074 }
4075
4076 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4077 {
4078         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4079         struct net_device *dev = info->user_ptr[1];
4080         struct station_parameters params;
4081         u8 *mac_addr;
4082         int err;
4083
4084         memset(&params, 0, sizeof(params));
4085
4086         params.listen_interval = -1;
4087
4088         if (!rdev->ops->change_station)
4089                 return -EOPNOTSUPP;
4090
4091         if (info->attrs[NL80211_ATTR_STA_AID])
4092                 return -EINVAL;
4093
4094         if (!info->attrs[NL80211_ATTR_MAC])
4095                 return -EINVAL;
4096
4097         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4098
4099         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4100                 params.supported_rates =
4101                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4102                 params.supported_rates_len =
4103                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4104         }
4105
4106         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4107                 params.capability =
4108                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4109                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4110         }
4111
4112         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4113                 params.ext_capab =
4114                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4115                 params.ext_capab_len =
4116                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4117         }
4118
4119         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4120                 return -EINVAL;
4121
4122         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4123                 return -EINVAL;
4124
4125         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4126                 params.plink_action =
4127                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4128                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4129                         return -EINVAL;
4130         }
4131
4132         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4133                 params.plink_state =
4134                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4135                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4136                         return -EINVAL;
4137                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4138         }
4139
4140         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4141                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4142                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4143
4144                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4145                     pm > NL80211_MESH_POWER_MAX)
4146                         return -EINVAL;
4147
4148                 params.local_pm = pm;
4149         }
4150
4151         /* Include parameters for TDLS peer (will check later) */
4152         err = nl80211_set_station_tdls(info, &params);
4153         if (err)
4154                 return err;
4155
4156         params.vlan = get_vlan(info, rdev);
4157         if (IS_ERR(params.vlan))
4158                 return PTR_ERR(params.vlan);
4159
4160         switch (dev->ieee80211_ptr->iftype) {
4161         case NL80211_IFTYPE_AP:
4162         case NL80211_IFTYPE_AP_VLAN:
4163         case NL80211_IFTYPE_P2P_GO:
4164         case NL80211_IFTYPE_P2P_CLIENT:
4165         case NL80211_IFTYPE_STATION:
4166         case NL80211_IFTYPE_ADHOC:
4167         case NL80211_IFTYPE_MESH_POINT:
4168                 break;
4169         default:
4170                 err = -EOPNOTSUPP;
4171                 goto out_put_vlan;
4172         }
4173
4174         /* driver will call cfg80211_check_station_change() */
4175         err = rdev_change_station(rdev, dev, mac_addr, &params);
4176
4177  out_put_vlan:
4178         if (params.vlan)
4179                 dev_put(params.vlan);
4180
4181         return err;
4182 }
4183
4184 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4185 {
4186         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4187         int err;
4188         struct net_device *dev = info->user_ptr[1];
4189         struct station_parameters params;
4190         u8 *mac_addr = NULL;
4191
4192         memset(&params, 0, sizeof(params));
4193
4194         if (!rdev->ops->add_station)
4195                 return -EOPNOTSUPP;
4196
4197         if (!info->attrs[NL80211_ATTR_MAC])
4198                 return -EINVAL;
4199
4200         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4201                 return -EINVAL;
4202
4203         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4204                 return -EINVAL;
4205
4206         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4207             !info->attrs[NL80211_ATTR_PEER_AID])
4208                 return -EINVAL;
4209
4210         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4211         params.supported_rates =
4212                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4213         params.supported_rates_len =
4214                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4215         params.listen_interval =
4216                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4217
4218         if (info->attrs[NL80211_ATTR_PEER_AID])
4219                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4220         else
4221                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4222         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4223                 return -EINVAL;
4224
4225         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4226                 params.capability =
4227                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4228                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4229         }
4230
4231         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4232                 params.ext_capab =
4233                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4234                 params.ext_capab_len =
4235                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4236         }
4237
4238         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4239                 params.ht_capa =
4240                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4241
4242         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4243                 params.vht_capa =
4244                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4245
4246         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4247                 params.opmode_notif_used = true;
4248                 params.opmode_notif =
4249                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4250         }
4251
4252         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4253                 params.plink_action =
4254                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4255                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4256                         return -EINVAL;
4257         }
4258
4259         err = nl80211_parse_sta_channel_info(info, &params);
4260         if (err)
4261                 return err;
4262
4263         err = nl80211_parse_sta_wme(info, &params);
4264         if (err)
4265                 return err;
4266
4267         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4268                 return -EINVAL;
4269
4270         /* When you run into this, adjust the code below for the new flag */
4271         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4272
4273         switch (dev->ieee80211_ptr->iftype) {
4274         case NL80211_IFTYPE_AP:
4275         case NL80211_IFTYPE_AP_VLAN:
4276         case NL80211_IFTYPE_P2P_GO:
4277                 /* ignore WME attributes if iface/sta is not capable */
4278                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4279                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4280                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4281
4282                 /* TDLS peers cannot be added */
4283                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4284                     info->attrs[NL80211_ATTR_PEER_AID])
4285                         return -EINVAL;
4286                 /* but don't bother the driver with it */
4287                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4288
4289                 /* allow authenticated/associated only if driver handles it */
4290                 if (!(rdev->wiphy.features &
4291                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4292                     params.sta_flags_mask &
4293                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4294                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4295                         return -EINVAL;
4296
4297                 /* must be last in here for error handling */
4298                 params.vlan = get_vlan(info, rdev);
4299                 if (IS_ERR(params.vlan))
4300                         return PTR_ERR(params.vlan);
4301                 break;
4302         case NL80211_IFTYPE_MESH_POINT:
4303                 /* ignore uAPSD data */
4304                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4305
4306                 /* associated is disallowed */
4307                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4308                         return -EINVAL;
4309                 /* TDLS peers cannot be added */
4310                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4311                     info->attrs[NL80211_ATTR_PEER_AID])
4312                         return -EINVAL;
4313                 break;
4314         case NL80211_IFTYPE_STATION:
4315         case NL80211_IFTYPE_P2P_CLIENT:
4316                 /* ignore uAPSD data */
4317                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4318
4319                 /* these are disallowed */
4320                 if (params.sta_flags_mask &
4321                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4322                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4323                         return -EINVAL;
4324                 /* Only TDLS peers can be added */
4325                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4326                         return -EINVAL;
4327                 /* Can only add if TDLS ... */
4328                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4329                         return -EOPNOTSUPP;
4330                 /* ... with external setup is supported */
4331                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4332                         return -EOPNOTSUPP;
4333                 /*
4334                  * Older wpa_supplicant versions always mark the TDLS peer
4335                  * as authorized, but it shouldn't yet be.
4336                  */
4337                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4338                 break;
4339         default:
4340                 return -EOPNOTSUPP;
4341         }
4342
4343         /* be aware of params.vlan when changing code here */
4344
4345         err = rdev_add_station(rdev, dev, mac_addr, &params);
4346
4347         if (params.vlan)
4348                 dev_put(params.vlan);
4349         return err;
4350 }
4351
4352 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4353 {
4354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4355         struct net_device *dev = info->user_ptr[1];
4356         u8 *mac_addr = NULL;
4357
4358         if (info->attrs[NL80211_ATTR_MAC])
4359                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4360
4361         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4362             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4363             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4364             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4365                 return -EINVAL;
4366
4367         if (!rdev->ops->del_station)
4368                 return -EOPNOTSUPP;
4369
4370         return rdev_del_station(rdev, dev, mac_addr);
4371 }
4372
4373 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4374                                 int flags, struct net_device *dev,
4375                                 u8 *dst, u8 *next_hop,
4376                                 struct mpath_info *pinfo)
4377 {
4378         void *hdr;
4379         struct nlattr *pinfoattr;
4380
4381         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4382         if (!hdr)
4383                 return -1;
4384
4385         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4386             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4387             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4388             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4389                 goto nla_put_failure;
4390
4391         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4392         if (!pinfoattr)
4393                 goto nla_put_failure;
4394         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4395             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4396                         pinfo->frame_qlen))
4397                 goto nla_put_failure;
4398         if (((pinfo->filled & MPATH_INFO_SN) &&
4399              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4400             ((pinfo->filled & MPATH_INFO_METRIC) &&
4401              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4402                          pinfo->metric)) ||
4403             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4404              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4405                          pinfo->exptime)) ||
4406             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4407              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4408                         pinfo->flags)) ||
4409             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4410              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4411                          pinfo->discovery_timeout)) ||
4412             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4413              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4414                         pinfo->discovery_retries)))
4415                 goto nla_put_failure;
4416
4417         nla_nest_end(msg, pinfoattr);
4418
4419         return genlmsg_end(msg, hdr);
4420
4421  nla_put_failure:
4422         genlmsg_cancel(msg, hdr);
4423         return -EMSGSIZE;
4424 }
4425
4426 static int nl80211_dump_mpath(struct sk_buff *skb,
4427                               struct netlink_callback *cb)
4428 {
4429         struct mpath_info pinfo;
4430         struct cfg80211_registered_device *rdev;
4431         struct wireless_dev *wdev;
4432         u8 dst[ETH_ALEN];
4433         u8 next_hop[ETH_ALEN];
4434         int path_idx = cb->args[2];
4435         int err;
4436
4437         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4438         if (err)
4439                 return err;
4440
4441         if (!rdev->ops->dump_mpath) {
4442                 err = -EOPNOTSUPP;
4443                 goto out_err;
4444         }
4445
4446         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4447                 err = -EOPNOTSUPP;
4448                 goto out_err;
4449         }
4450
4451         while (1) {
4452                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4453                                       next_hop, &pinfo);
4454                 if (err == -ENOENT)
4455                         break;
4456                 if (err)
4457                         goto out_err;
4458
4459                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4460                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4461                                        wdev->netdev, dst, next_hop,
4462                                        &pinfo) < 0)
4463                         goto out;
4464
4465                 path_idx++;
4466         }
4467
4468
4469  out:
4470         cb->args[2] = path_idx;
4471         err = skb->len;
4472  out_err:
4473         nl80211_finish_wdev_dump(rdev);
4474         return err;
4475 }
4476
4477 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4478 {
4479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4480         int err;
4481         struct net_device *dev = info->user_ptr[1];
4482         struct mpath_info pinfo;
4483         struct sk_buff *msg;
4484         u8 *dst = NULL;
4485         u8 next_hop[ETH_ALEN];
4486
4487         memset(&pinfo, 0, sizeof(pinfo));
4488
4489         if (!info->attrs[NL80211_ATTR_MAC])
4490                 return -EINVAL;
4491
4492         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4493
4494         if (!rdev->ops->get_mpath)
4495                 return -EOPNOTSUPP;
4496
4497         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4498                 return -EOPNOTSUPP;
4499
4500         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4501         if (err)
4502                 return err;
4503
4504         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4505         if (!msg)
4506                 return -ENOMEM;
4507
4508         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4509                                  dev, dst, next_hop, &pinfo) < 0) {
4510                 nlmsg_free(msg);
4511                 return -ENOBUFS;
4512         }
4513
4514         return genlmsg_reply(msg, info);
4515 }
4516
4517 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4518 {
4519         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4520         struct net_device *dev = info->user_ptr[1];
4521         u8 *dst = NULL;
4522         u8 *next_hop = NULL;
4523
4524         if (!info->attrs[NL80211_ATTR_MAC])
4525                 return -EINVAL;
4526
4527         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4528                 return -EINVAL;
4529
4530         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4531         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4532
4533         if (!rdev->ops->change_mpath)
4534                 return -EOPNOTSUPP;
4535
4536         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4537                 return -EOPNOTSUPP;
4538
4539         return rdev_change_mpath(rdev, dev, dst, next_hop);
4540 }
4541
4542 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4543 {
4544         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4545         struct net_device *dev = info->user_ptr[1];
4546         u8 *dst = NULL;
4547         u8 *next_hop = NULL;
4548
4549         if (!info->attrs[NL80211_ATTR_MAC])
4550                 return -EINVAL;
4551
4552         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4553                 return -EINVAL;
4554
4555         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4556         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4557
4558         if (!rdev->ops->add_mpath)
4559                 return -EOPNOTSUPP;
4560
4561         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4562                 return -EOPNOTSUPP;
4563
4564         return rdev_add_mpath(rdev, dev, dst, next_hop);
4565 }
4566
4567 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4568 {
4569         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4570         struct net_device *dev = info->user_ptr[1];
4571         u8 *dst = NULL;
4572
4573         if (info->attrs[NL80211_ATTR_MAC])
4574                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4575
4576         if (!rdev->ops->del_mpath)
4577                 return -EOPNOTSUPP;
4578
4579         return rdev_del_mpath(rdev, dev, dst);
4580 }
4581
4582 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4583 {
4584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4585         struct net_device *dev = info->user_ptr[1];
4586         struct wireless_dev *wdev = dev->ieee80211_ptr;
4587         struct bss_parameters params;
4588         int err;
4589
4590         memset(&params, 0, sizeof(params));
4591         /* default to not changing parameters */
4592         params.use_cts_prot = -1;
4593         params.use_short_preamble = -1;
4594         params.use_short_slot_time = -1;
4595         params.ap_isolate = -1;
4596         params.ht_opmode = -1;
4597         params.p2p_ctwindow = -1;
4598         params.p2p_opp_ps = -1;
4599
4600         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4601                 params.use_cts_prot =
4602                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4603         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4604                 params.use_short_preamble =
4605                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4606         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4607                 params.use_short_slot_time =
4608                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4609         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4610                 params.basic_rates =
4611                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4612                 params.basic_rates_len =
4613                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4614         }
4615         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4616                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4617         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4618                 params.ht_opmode =
4619                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4620
4621         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4622                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4623                         return -EINVAL;
4624                 params.p2p_ctwindow =
4625                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4626                 if (params.p2p_ctwindow < 0)
4627                         return -EINVAL;
4628                 if (params.p2p_ctwindow != 0 &&
4629                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4630                         return -EINVAL;
4631         }
4632
4633         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4634                 u8 tmp;
4635
4636                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4637                         return -EINVAL;
4638                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4639                 if (tmp > 1)
4640                         return -EINVAL;
4641                 params.p2p_opp_ps = tmp;
4642                 if (params.p2p_opp_ps &&
4643                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4644                         return -EINVAL;
4645         }
4646
4647         if (!rdev->ops->change_bss)
4648                 return -EOPNOTSUPP;
4649
4650         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4651             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4652                 return -EOPNOTSUPP;
4653
4654         wdev_lock(wdev);
4655         err = rdev_change_bss(rdev, dev, &params);
4656         wdev_unlock(wdev);
4657
4658         return err;
4659 }
4660
4661 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4662         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4663         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4664         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4665         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4666         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4667         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4668         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
4669 };
4670
4671 static int parse_reg_rule(struct nlattr *tb[],
4672         struct ieee80211_reg_rule *reg_rule)
4673 {
4674         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4675         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4676
4677         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4678                 return -EINVAL;
4679         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4680                 return -EINVAL;
4681         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4682                 return -EINVAL;
4683         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4684                 return -EINVAL;
4685         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4686                 return -EINVAL;
4687
4688         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4689
4690         freq_range->start_freq_khz =
4691                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4692         freq_range->end_freq_khz =
4693                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4694         freq_range->max_bandwidth_khz =
4695                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4696
4697         power_rule->max_eirp =
4698                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4699
4700         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4701                 power_rule->max_antenna_gain =
4702                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4703
4704         if (tb[NL80211_ATTR_DFS_CAC_TIME])
4705                 reg_rule->dfs_cac_ms =
4706                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
4707
4708         return 0;
4709 }
4710
4711 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4712 {
4713         char *data = NULL;
4714         enum nl80211_user_reg_hint_type user_reg_hint_type;
4715
4716         /*
4717          * You should only get this when cfg80211 hasn't yet initialized
4718          * completely when built-in to the kernel right between the time
4719          * window between nl80211_init() and regulatory_init(), if that is
4720          * even possible.
4721          */
4722         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4723                 return -EINPROGRESS;
4724
4725         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4726                 user_reg_hint_type =
4727                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4728         else
4729                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4730
4731         switch (user_reg_hint_type) {
4732         case NL80211_USER_REG_HINT_USER:
4733         case NL80211_USER_REG_HINT_CELL_BASE:
4734                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4735                         return -EINVAL;
4736
4737                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4738                 return regulatory_hint_user(data, user_reg_hint_type);
4739         case NL80211_USER_REG_HINT_INDOOR:
4740                 return regulatory_hint_indoor_user();
4741         default:
4742                 return -EINVAL;
4743         }
4744 }
4745
4746 static int nl80211_get_mesh_config(struct sk_buff *skb,
4747                                    struct genl_info *info)
4748 {
4749         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4750         struct net_device *dev = info->user_ptr[1];
4751         struct wireless_dev *wdev = dev->ieee80211_ptr;
4752         struct mesh_config cur_params;
4753         int err = 0;
4754         void *hdr;
4755         struct nlattr *pinfoattr;
4756         struct sk_buff *msg;
4757
4758         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4759                 return -EOPNOTSUPP;
4760
4761         if (!rdev->ops->get_mesh_config)
4762                 return -EOPNOTSUPP;
4763
4764         wdev_lock(wdev);
4765         /* If not connected, get default parameters */
4766         if (!wdev->mesh_id_len)
4767                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4768         else
4769                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4770         wdev_unlock(wdev);
4771
4772         if (err)
4773                 return err;
4774
4775         /* Draw up a netlink message to send back */
4776         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4777         if (!msg)
4778                 return -ENOMEM;
4779         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4780                              NL80211_CMD_GET_MESH_CONFIG);
4781         if (!hdr)
4782                 goto out;
4783         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4784         if (!pinfoattr)
4785                 goto nla_put_failure;
4786         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4787             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4788                         cur_params.dot11MeshRetryTimeout) ||
4789             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4790                         cur_params.dot11MeshConfirmTimeout) ||
4791             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4792                         cur_params.dot11MeshHoldingTimeout) ||
4793             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4794                         cur_params.dot11MeshMaxPeerLinks) ||
4795             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4796                        cur_params.dot11MeshMaxRetries) ||
4797             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4798                        cur_params.dot11MeshTTL) ||
4799             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4800                        cur_params.element_ttl) ||
4801             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4802                        cur_params.auto_open_plinks) ||
4803             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4804                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4805             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4806                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4807             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4808                         cur_params.path_refresh_time) ||
4809             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4810                         cur_params.min_discovery_timeout) ||
4811             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4812                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4813             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4814                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4815             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4816                         cur_params.dot11MeshHWMPperrMinInterval) ||
4817             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4818                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4819             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4820                        cur_params.dot11MeshHWMPRootMode) ||
4821             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4822                         cur_params.dot11MeshHWMPRannInterval) ||
4823             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4824                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4825             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4826                        cur_params.dot11MeshForwarding) ||
4827             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4828                         cur_params.rssi_threshold) ||
4829             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4830                         cur_params.ht_opmode) ||
4831             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4832                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4833             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4834                         cur_params.dot11MeshHWMProotInterval) ||
4835             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4836                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4837             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4838                         cur_params.power_mode) ||
4839             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4840                         cur_params.dot11MeshAwakeWindowDuration) ||
4841             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4842                         cur_params.plink_timeout))
4843                 goto nla_put_failure;
4844         nla_nest_end(msg, pinfoattr);
4845         genlmsg_end(msg, hdr);
4846         return genlmsg_reply(msg, info);
4847
4848  nla_put_failure:
4849         genlmsg_cancel(msg, hdr);
4850  out:
4851         nlmsg_free(msg);
4852         return -ENOBUFS;
4853 }
4854
4855 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4856         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4857         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4858         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4859         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4860         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4861         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4862         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4863         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4864         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4865         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4866         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4867         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4868         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4869         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4870         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4871         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4872         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4873         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4874         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4875         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4876         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4877         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4878         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4879         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4880         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4881         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4882         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4883         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4884 };
4885
4886 static const struct nla_policy
4887         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4888         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4889         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4890         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4891         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4892         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4893         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4894         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4895                                     .len = IEEE80211_MAX_DATA_LEN },
4896         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4897 };
4898
4899 static int nl80211_parse_mesh_config(struct genl_info *info,
4900                                      struct mesh_config *cfg,
4901                                      u32 *mask_out)
4902 {
4903         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4904         u32 mask = 0;
4905
4906 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4907 do {                                                                        \
4908         if (tb[attr]) {                                                     \
4909                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4910                         return -EINVAL;                                     \
4911                 cfg->param = fn(tb[attr]);                                  \
4912                 mask |= (1 << (attr - 1));                                  \
4913         }                                                                   \
4914 } while (0)
4915
4916
4917         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4918                 return -EINVAL;
4919         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4920                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4921                              nl80211_meshconf_params_policy))
4922                 return -EINVAL;
4923
4924         /* This makes sure that there aren't more than 32 mesh config
4925          * parameters (otherwise our bitfield scheme would not work.) */
4926         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4927
4928         /* Fill in the params struct */
4929         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4930                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4931                                   nla_get_u16);
4932         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4933                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4934                                   nla_get_u16);
4935         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4936                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4937                                   nla_get_u16);
4938         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4939                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4940                                   nla_get_u16);
4941         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4942                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4943                                   nla_get_u8);
4944         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4945                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4946         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4947                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4948                                   nla_get_u8);
4949         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4950                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4951                                   nla_get_u8);
4952         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4953                                   1, 255, mask,
4954                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4955                                   nla_get_u32);
4956         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4957                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4958                                   nla_get_u8);
4959         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4960                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4961                                   nla_get_u32);
4962         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4963                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4964                                   nla_get_u16);
4965         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4966                                   1, 65535, mask,
4967                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4968                                   nla_get_u32);
4969         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4970                                   1, 65535, mask,
4971                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4972                                   nla_get_u16);
4973         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4974                                   1, 65535, mask,
4975                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4976                                   nla_get_u16);
4977         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4978                                   dot11MeshHWMPnetDiameterTraversalTime,
4979                                   1, 65535, mask,
4980                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4981                                   nla_get_u16);
4982         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4983                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4984                                   nla_get_u8);
4985         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4986                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4987                                   nla_get_u16);
4988         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4989                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4990                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4991                                   nla_get_u8);
4992         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4993                                   mask, NL80211_MESHCONF_FORWARDING,
4994                                   nla_get_u8);
4995         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4996                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4997                                   nla_get_s32);
4998         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4999                                   mask, NL80211_MESHCONF_HT_OPMODE,
5000                                   nla_get_u16);
5001         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5002                                   1, 65535, mask,
5003                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5004                                   nla_get_u32);
5005         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5006                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5007                                   nla_get_u16);
5008         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5009                                   dot11MeshHWMPconfirmationInterval,
5010                                   1, 65535, mask,
5011                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5012                                   nla_get_u16);
5013         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5014                                   NL80211_MESH_POWER_ACTIVE,
5015                                   NL80211_MESH_POWER_MAX,
5016                                   mask, NL80211_MESHCONF_POWER_MODE,
5017                                   nla_get_u32);
5018         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5019                                   0, 65535, mask,
5020                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5021         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
5022                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5023                                   nla_get_u32);
5024         if (mask_out)
5025                 *mask_out = mask;
5026
5027         return 0;
5028
5029 #undef FILL_IN_MESH_PARAM_IF_SET
5030 }
5031
5032 static int nl80211_parse_mesh_setup(struct genl_info *info,
5033                                      struct mesh_setup *setup)
5034 {
5035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5036         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5037
5038         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5039                 return -EINVAL;
5040         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5041                              info->attrs[NL80211_ATTR_MESH_SETUP],
5042                              nl80211_mesh_setup_params_policy))
5043                 return -EINVAL;
5044
5045         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5046                 setup->sync_method =
5047                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5048                  IEEE80211_SYNC_METHOD_VENDOR :
5049                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5050
5051         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5052                 setup->path_sel_proto =
5053                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5054                  IEEE80211_PATH_PROTOCOL_VENDOR :
5055                  IEEE80211_PATH_PROTOCOL_HWMP;
5056
5057         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5058                 setup->path_metric =
5059                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5060                  IEEE80211_PATH_METRIC_VENDOR :
5061                  IEEE80211_PATH_METRIC_AIRTIME;
5062
5063
5064         if (tb[NL80211_MESH_SETUP_IE]) {
5065                 struct nlattr *ieattr =
5066                         tb[NL80211_MESH_SETUP_IE];
5067                 if (!is_valid_ie_attr(ieattr))
5068                         return -EINVAL;
5069                 setup->ie = nla_data(ieattr);
5070                 setup->ie_len = nla_len(ieattr);
5071         }
5072         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5073             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5074                 return -EINVAL;
5075         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5076         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5077         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5078         if (setup->is_secure)
5079                 setup->user_mpm = true;
5080
5081         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5082                 if (!setup->user_mpm)
5083                         return -EINVAL;
5084                 setup->auth_id =
5085                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5086         }
5087
5088         return 0;
5089 }
5090
5091 static int nl80211_update_mesh_config(struct sk_buff *skb,
5092                                       struct genl_info *info)
5093 {
5094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5095         struct net_device *dev = info->user_ptr[1];
5096         struct wireless_dev *wdev = dev->ieee80211_ptr;
5097         struct mesh_config cfg;
5098         u32 mask;
5099         int err;
5100
5101         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5102                 return -EOPNOTSUPP;
5103
5104         if (!rdev->ops->update_mesh_config)
5105                 return -EOPNOTSUPP;
5106
5107         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5108         if (err)
5109                 return err;
5110
5111         wdev_lock(wdev);
5112         if (!wdev->mesh_id_len)
5113                 err = -ENOLINK;
5114
5115         if (!err)
5116                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5117
5118         wdev_unlock(wdev);
5119
5120         return err;
5121 }
5122
5123 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5124 {
5125         const struct ieee80211_regdomain *regdom;
5126         struct sk_buff *msg;
5127         void *hdr = NULL;
5128         struct nlattr *nl_reg_rules;
5129         unsigned int i;
5130
5131         if (!cfg80211_regdomain)
5132                 return -EINVAL;
5133
5134         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5135         if (!msg)
5136                 return -ENOBUFS;
5137
5138         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5139                              NL80211_CMD_GET_REG);
5140         if (!hdr)
5141                 goto put_failure;
5142
5143         if (reg_last_request_cell_base() &&
5144             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5145                         NL80211_USER_REG_HINT_CELL_BASE))
5146                 goto nla_put_failure;
5147
5148         rcu_read_lock();
5149         regdom = rcu_dereference(cfg80211_regdomain);
5150
5151         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5152             (regdom->dfs_region &&
5153              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5154                 goto nla_put_failure_rcu;
5155
5156         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5157         if (!nl_reg_rules)
5158                 goto nla_put_failure_rcu;
5159
5160         for (i = 0; i < regdom->n_reg_rules; i++) {
5161                 struct nlattr *nl_reg_rule;
5162                 const struct ieee80211_reg_rule *reg_rule;
5163                 const struct ieee80211_freq_range *freq_range;
5164                 const struct ieee80211_power_rule *power_rule;
5165                 unsigned int max_bandwidth_khz;
5166
5167                 reg_rule = &regdom->reg_rules[i];
5168                 freq_range = &reg_rule->freq_range;
5169                 power_rule = &reg_rule->power_rule;
5170
5171                 nl_reg_rule = nla_nest_start(msg, i);
5172                 if (!nl_reg_rule)
5173                         goto nla_put_failure_rcu;
5174
5175                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5176                 if (!max_bandwidth_khz)
5177                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5178                                                                   reg_rule);
5179
5180                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5181                                 reg_rule->flags) ||
5182                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5183                                 freq_range->start_freq_khz) ||
5184                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5185                                 freq_range->end_freq_khz) ||
5186                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5187                                 max_bandwidth_khz) ||
5188                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5189                                 power_rule->max_antenna_gain) ||
5190                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5191                                 power_rule->max_eirp) ||
5192                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5193                                 reg_rule->dfs_cac_ms))
5194                         goto nla_put_failure_rcu;
5195
5196                 nla_nest_end(msg, nl_reg_rule);
5197         }
5198         rcu_read_unlock();
5199
5200         nla_nest_end(msg, nl_reg_rules);
5201
5202         genlmsg_end(msg, hdr);
5203         return genlmsg_reply(msg, info);
5204
5205 nla_put_failure_rcu:
5206         rcu_read_unlock();
5207 nla_put_failure:
5208         genlmsg_cancel(msg, hdr);
5209 put_failure:
5210         nlmsg_free(msg);
5211         return -EMSGSIZE;
5212 }
5213
5214 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5215 {
5216         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5217         struct nlattr *nl_reg_rule;
5218         char *alpha2 = NULL;
5219         int rem_reg_rules = 0, r = 0;
5220         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5221         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5222         struct ieee80211_regdomain *rd = NULL;
5223
5224         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5225                 return -EINVAL;
5226
5227         if (!info->attrs[NL80211_ATTR_REG_RULES])
5228                 return -EINVAL;
5229
5230         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5231
5232         if (info->attrs[NL80211_ATTR_DFS_REGION])
5233                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5234
5235         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5236                             rem_reg_rules) {
5237                 num_rules++;
5238                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5239                         return -EINVAL;
5240         }
5241
5242         if (!reg_is_valid_request(alpha2))
5243                 return -EINVAL;
5244
5245         size_of_regd = sizeof(struct ieee80211_regdomain) +
5246                        num_rules * sizeof(struct ieee80211_reg_rule);
5247
5248         rd = kzalloc(size_of_regd, GFP_KERNEL);
5249         if (!rd)
5250                 return -ENOMEM;
5251
5252         rd->n_reg_rules = num_rules;
5253         rd->alpha2[0] = alpha2[0];
5254         rd->alpha2[1] = alpha2[1];
5255
5256         /*
5257          * Disable DFS master mode if the DFS region was
5258          * not supported or known on this kernel.
5259          */
5260         if (reg_supported_dfs_region(dfs_region))
5261                 rd->dfs_region = dfs_region;
5262
5263         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5264                             rem_reg_rules) {
5265                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5266                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5267                               reg_rule_policy);
5268                 if (r)
5269                         goto bad_reg;
5270                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5271                 if (r)
5272                         goto bad_reg;
5273
5274                 rule_idx++;
5275
5276                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5277                         r = -EINVAL;
5278                         goto bad_reg;
5279                 }
5280         }
5281
5282         r = set_regdom(rd);
5283         /* set_regdom took ownership */
5284         rd = NULL;
5285
5286  bad_reg:
5287         kfree(rd);
5288         return r;
5289 }
5290
5291 static int validate_scan_freqs(struct nlattr *freqs)
5292 {
5293         struct nlattr *attr1, *attr2;
5294         int n_channels = 0, tmp1, tmp2;
5295
5296         nla_for_each_nested(attr1, freqs, tmp1) {
5297                 n_channels++;
5298                 /*
5299                  * Some hardware has a limited channel list for
5300                  * scanning, and it is pretty much nonsensical
5301                  * to scan for a channel twice, so disallow that
5302                  * and don't require drivers to check that the
5303                  * channel list they get isn't longer than what
5304                  * they can scan, as long as they can scan all
5305                  * the channels they registered at once.
5306                  */
5307                 nla_for_each_nested(attr2, freqs, tmp2)
5308                         if (attr1 != attr2 &&
5309                             nla_get_u32(attr1) == nla_get_u32(attr2))
5310                                 return 0;
5311         }
5312
5313         return n_channels;
5314 }
5315
5316 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5317 {
5318         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5319         struct wireless_dev *wdev = info->user_ptr[1];
5320         struct cfg80211_scan_request *request;
5321         struct nlattr *attr;
5322         struct wiphy *wiphy;
5323         int err, tmp, n_ssids = 0, n_channels, i;
5324         size_t ie_len;
5325
5326         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5327                 return -EINVAL;
5328
5329         wiphy = &rdev->wiphy;
5330
5331         if (!rdev->ops->scan)
5332                 return -EOPNOTSUPP;
5333
5334         if (rdev->scan_req || rdev->scan_msg) {
5335                 err = -EBUSY;
5336                 goto unlock;
5337         }
5338
5339         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5340                 n_channels = validate_scan_freqs(
5341                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5342                 if (!n_channels) {
5343                         err = -EINVAL;
5344                         goto unlock;
5345                 }
5346         } else {
5347                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5348         }
5349
5350         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5351                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5352                         n_ssids++;
5353
5354         if (n_ssids > wiphy->max_scan_ssids) {
5355                 err = -EINVAL;
5356                 goto unlock;
5357         }
5358
5359         if (info->attrs[NL80211_ATTR_IE])
5360                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5361         else
5362                 ie_len = 0;
5363
5364         if (ie_len > wiphy->max_scan_ie_len) {
5365                 err = -EINVAL;
5366                 goto unlock;
5367         }
5368
5369         request = kzalloc(sizeof(*request)
5370                         + sizeof(*request->ssids) * n_ssids
5371                         + sizeof(*request->channels) * n_channels
5372                         + ie_len, GFP_KERNEL);
5373         if (!request) {
5374                 err = -ENOMEM;
5375                 goto unlock;
5376         }
5377
5378         if (n_ssids)
5379                 request->ssids = (void *)&request->channels[n_channels];
5380         request->n_ssids = n_ssids;
5381         if (ie_len) {
5382                 if (request->ssids)
5383                         request->ie = (void *)(request->ssids + n_ssids);
5384                 else
5385                         request->ie = (void *)(request->channels + n_channels);
5386         }
5387
5388         i = 0;
5389         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5390                 /* user specified, bail out if channel not found */
5391                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5392                         struct ieee80211_channel *chan;
5393
5394                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5395
5396                         if (!chan) {
5397                                 err = -EINVAL;
5398                                 goto out_free;
5399                         }
5400
5401                         /* ignore disabled channels */
5402                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5403                                 continue;
5404
5405                         request->channels[i] = chan;
5406                         i++;
5407                 }
5408         } else {
5409                 enum ieee80211_band band;
5410
5411                 /* all channels */
5412                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5413                         int j;
5414                         if (!wiphy->bands[band])
5415                                 continue;
5416                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5417                                 struct ieee80211_channel *chan;
5418
5419                                 chan = &wiphy->bands[band]->channels[j];
5420
5421                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5422                                         continue;
5423
5424                                 request->channels[i] = chan;
5425                                 i++;
5426                         }
5427                 }
5428         }
5429
5430         if (!i) {
5431                 err = -EINVAL;
5432                 goto out_free;
5433         }
5434
5435         request->n_channels = i;
5436
5437         i = 0;
5438         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5439                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5440                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5441                                 err = -EINVAL;
5442                                 goto out_free;
5443                         }
5444                         request->ssids[i].ssid_len = nla_len(attr);
5445                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5446                         i++;
5447                 }
5448         }
5449
5450         if (info->attrs[NL80211_ATTR_IE]) {
5451                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5452                 memcpy((void *)request->ie,
5453                        nla_data(info->attrs[NL80211_ATTR_IE]),
5454                        request->ie_len);
5455         }
5456
5457         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5458                 if (wiphy->bands[i])
5459                         request->rates[i] =
5460                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5461
5462         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5463                 nla_for_each_nested(attr,
5464                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5465                                     tmp) {
5466                         enum ieee80211_band band = nla_type(attr);
5467
5468                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5469                                 err = -EINVAL;
5470                                 goto out_free;
5471                         }
5472
5473                         if (!wiphy->bands[band])
5474                                 continue;
5475
5476                         err = ieee80211_get_ratemask(wiphy->bands[band],
5477                                                      nla_data(attr),
5478                                                      nla_len(attr),
5479                                                      &request->rates[band]);
5480                         if (err)
5481                                 goto out_free;
5482                 }
5483         }
5484
5485         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5486                 request->flags = nla_get_u32(
5487                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5488                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5489                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5490                         err = -EOPNOTSUPP;
5491                         goto out_free;
5492                 }
5493         }
5494
5495         request->no_cck =
5496                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5497
5498         request->wdev = wdev;
5499         request->wiphy = &rdev->wiphy;
5500         request->scan_start = jiffies;
5501
5502         rdev->scan_req = request;
5503         err = rdev_scan(rdev, request);
5504
5505         if (!err) {
5506                 nl80211_send_scan_start(rdev, wdev);
5507                 if (wdev->netdev)
5508                         dev_hold(wdev->netdev);
5509         } else {
5510  out_free:
5511                 rdev->scan_req = NULL;
5512                 kfree(request);
5513         }
5514
5515  unlock:
5516         return err;
5517 }
5518
5519 static int nl80211_start_sched_scan(struct sk_buff *skb,
5520                                     struct genl_info *info)
5521 {
5522         struct cfg80211_sched_scan_request *request;
5523         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5524         struct net_device *dev = info->user_ptr[1];
5525         struct nlattr *attr;
5526         struct wiphy *wiphy;
5527         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5528         u32 interval;
5529         enum ieee80211_band band;
5530         size_t ie_len;
5531         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5532         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
5533
5534         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5535             !rdev->ops->sched_scan_start)
5536                 return -EOPNOTSUPP;
5537
5538         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5539                 return -EINVAL;
5540
5541         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5542                 return -EINVAL;
5543
5544         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5545         if (interval == 0)
5546                 return -EINVAL;
5547
5548         wiphy = &rdev->wiphy;
5549
5550         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5551                 n_channels = validate_scan_freqs(
5552                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5553                 if (!n_channels)
5554                         return -EINVAL;
5555         } else {
5556                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5557         }
5558
5559         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5560                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5561                                     tmp)
5562                         n_ssids++;
5563
5564         if (n_ssids > wiphy->max_sched_scan_ssids)
5565                 return -EINVAL;
5566
5567         /*
5568          * First, count the number of 'real' matchsets. Due to an issue with
5569          * the old implementation, matchsets containing only the RSSI attribute
5570          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
5571          * RSSI for all matchsets, rather than their own matchset for reporting
5572          * all APs with a strong RSSI. This is needed to be compatible with
5573          * older userspace that treated a matchset with only the RSSI as the
5574          * global RSSI for all other matchsets - if there are other matchsets.
5575          */
5576         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5577                 nla_for_each_nested(attr,
5578                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5579                                     tmp) {
5580                         struct nlattr *rssi;
5581
5582                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5583                                         nla_data(attr), nla_len(attr),
5584                                         nl80211_match_policy);
5585                         if (err)
5586                                 return err;
5587                         /* add other standalone attributes here */
5588                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
5589                                 n_match_sets++;
5590                                 continue;
5591                         }
5592                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5593                         if (rssi)
5594                                 default_match_rssi = nla_get_s32(rssi);
5595                 }
5596         }
5597
5598         /* However, if there's no other matchset, add the RSSI one */
5599         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
5600                 n_match_sets = 1;
5601
5602         if (n_match_sets > wiphy->max_match_sets)
5603                 return -EINVAL;
5604
5605         if (info->attrs[NL80211_ATTR_IE])
5606                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5607         else
5608                 ie_len = 0;
5609
5610         if (ie_len > wiphy->max_sched_scan_ie_len)
5611                 return -EINVAL;
5612
5613         if (rdev->sched_scan_req) {
5614                 err = -EINPROGRESS;
5615                 goto out;
5616         }
5617
5618         request = kzalloc(sizeof(*request)
5619                         + sizeof(*request->ssids) * n_ssids
5620                         + sizeof(*request->match_sets) * n_match_sets
5621                         + sizeof(*request->channels) * n_channels
5622                         + ie_len, GFP_KERNEL);
5623         if (!request) {
5624                 err = -ENOMEM;
5625                 goto out;
5626         }
5627
5628         if (n_ssids)
5629                 request->ssids = (void *)&request->channels[n_channels];
5630         request->n_ssids = n_ssids;
5631         if (ie_len) {
5632                 if (request->ssids)
5633                         request->ie = (void *)(request->ssids + n_ssids);
5634                 else
5635                         request->ie = (void *)(request->channels + n_channels);
5636         }
5637
5638         if (n_match_sets) {
5639                 if (request->ie)
5640                         request->match_sets = (void *)(request->ie + ie_len);
5641                 else if (request->ssids)
5642                         request->match_sets =
5643                                 (void *)(request->ssids + n_ssids);
5644                 else
5645                         request->match_sets =
5646                                 (void *)(request->channels + n_channels);
5647         }
5648         request->n_match_sets = n_match_sets;
5649
5650         i = 0;
5651         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5652                 /* user specified, bail out if channel not found */
5653                 nla_for_each_nested(attr,
5654                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5655                                     tmp) {
5656                         struct ieee80211_channel *chan;
5657
5658                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5659
5660                         if (!chan) {
5661                                 err = -EINVAL;
5662                                 goto out_free;
5663                         }
5664
5665                         /* ignore disabled channels */
5666                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5667                                 continue;
5668
5669                         request->channels[i] = chan;
5670                         i++;
5671                 }
5672         } else {
5673                 /* all channels */
5674                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5675                         int j;
5676                         if (!wiphy->bands[band])
5677                                 continue;
5678                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5679                                 struct ieee80211_channel *chan;
5680
5681                                 chan = &wiphy->bands[band]->channels[j];
5682
5683                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5684                                         continue;
5685
5686                                 request->channels[i] = chan;
5687                                 i++;
5688                         }
5689                 }
5690         }
5691
5692         if (!i) {
5693                 err = -EINVAL;
5694                 goto out_free;
5695         }
5696
5697         request->n_channels = i;
5698
5699         i = 0;
5700         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5701                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5702                                     tmp) {
5703                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5704                                 err = -EINVAL;
5705                                 goto out_free;
5706                         }
5707                         request->ssids[i].ssid_len = nla_len(attr);
5708                         memcpy(request->ssids[i].ssid, nla_data(attr),
5709                                nla_len(attr));
5710                         i++;
5711                 }
5712         }
5713
5714         i = 0;
5715         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5716                 nla_for_each_nested(attr,
5717                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5718                                     tmp) {
5719                         struct nlattr *ssid, *rssi;
5720
5721                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5722                                         nla_data(attr), nla_len(attr),
5723                                         nl80211_match_policy);
5724                         if (err)
5725                                 goto out_free;
5726                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5727                         if (ssid) {
5728                                 if (WARN_ON(i >= n_match_sets)) {
5729                                         /* this indicates a programming error,
5730                                          * the loop above should have verified
5731                                          * things properly
5732                                          */
5733                                         err = -EINVAL;
5734                                         goto out_free;
5735                                 }
5736
5737                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5738                                         err = -EINVAL;
5739                                         goto out_free;
5740                                 }
5741                                 memcpy(request->match_sets[i].ssid.ssid,
5742                                        nla_data(ssid), nla_len(ssid));
5743                                 request->match_sets[i].ssid.ssid_len =
5744                                         nla_len(ssid);
5745                                 /* special attribute - old implemenation w/a */
5746                                 request->match_sets[i].rssi_thold =
5747                                         default_match_rssi;
5748                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5749                                 if (rssi)
5750                                         request->match_sets[i].rssi_thold =
5751                                                 nla_get_s32(rssi);
5752                         }
5753                         i++;
5754                 }
5755
5756                 /* there was no other matchset, so the RSSI one is alone */
5757                 if (i == 0)
5758                         request->match_sets[0].rssi_thold = default_match_rssi;
5759
5760                 request->min_rssi_thold = INT_MAX;
5761                 for (i = 0; i < n_match_sets; i++)
5762                         request->min_rssi_thold =
5763                                 min(request->match_sets[i].rssi_thold,
5764                                     request->min_rssi_thold);
5765         } else {
5766                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
5767         }
5768
5769         if (ie_len) {
5770                 request->ie_len = ie_len;
5771                 memcpy((void *)request->ie,
5772                        nla_data(info->attrs[NL80211_ATTR_IE]),
5773                        request->ie_len);
5774         }
5775
5776         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5777                 request->flags = nla_get_u32(
5778                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5779                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5780                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5781                         err = -EOPNOTSUPP;
5782                         goto out_free;
5783                 }
5784         }
5785
5786         request->dev = dev;
5787         request->wiphy = &rdev->wiphy;
5788         request->interval = interval;
5789         request->scan_start = jiffies;
5790
5791         err = rdev_sched_scan_start(rdev, dev, request);
5792         if (!err) {
5793                 rdev->sched_scan_req = request;
5794                 nl80211_send_sched_scan(rdev, dev,
5795                                         NL80211_CMD_START_SCHED_SCAN);
5796                 goto out;
5797         }
5798
5799 out_free:
5800         kfree(request);
5801 out:
5802         return err;
5803 }
5804
5805 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5806                                    struct genl_info *info)
5807 {
5808         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5809
5810         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5811             !rdev->ops->sched_scan_stop)
5812                 return -EOPNOTSUPP;
5813
5814         return __cfg80211_stop_sched_scan(rdev, false);
5815 }
5816
5817 static int nl80211_start_radar_detection(struct sk_buff *skb,
5818                                          struct genl_info *info)
5819 {
5820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5821         struct net_device *dev = info->user_ptr[1];
5822         struct wireless_dev *wdev = dev->ieee80211_ptr;
5823         struct cfg80211_chan_def chandef;
5824         enum nl80211_dfs_regions dfs_region;
5825         unsigned int cac_time_ms;
5826         int err;
5827
5828         dfs_region = reg_get_dfs_region(wdev->wiphy);
5829         if (dfs_region == NL80211_DFS_UNSET)
5830                 return -EINVAL;
5831
5832         err = nl80211_parse_chandef(rdev, info, &chandef);
5833         if (err)
5834                 return err;
5835
5836         if (netif_carrier_ok(dev))
5837                 return -EBUSY;
5838
5839         if (wdev->cac_started)
5840                 return -EBUSY;
5841
5842         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
5843                                             wdev->iftype);
5844         if (err < 0)
5845                 return err;
5846
5847         if (err == 0)
5848                 return -EINVAL;
5849
5850         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
5851                 return -EINVAL;
5852
5853         if (!rdev->ops->start_radar_detection)
5854                 return -EOPNOTSUPP;
5855
5856         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
5857         if (WARN_ON(!cac_time_ms))
5858                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
5859
5860         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
5861                                                cac_time_ms);
5862         if (!err) {
5863                 wdev->chandef = chandef;
5864                 wdev->cac_started = true;
5865                 wdev->cac_start_time = jiffies;
5866                 wdev->cac_time_ms = cac_time_ms;
5867         }
5868         return err;
5869 }
5870
5871 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5872 {
5873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5874         struct net_device *dev = info->user_ptr[1];
5875         struct wireless_dev *wdev = dev->ieee80211_ptr;
5876         struct cfg80211_csa_settings params;
5877         /* csa_attrs is defined static to avoid waste of stack size - this
5878          * function is called under RTNL lock, so this should not be a problem.
5879          */
5880         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5881         u8 radar_detect_width = 0;
5882         int err;
5883         bool need_new_beacon = false;
5884         int len, i;
5885
5886         if (!rdev->ops->channel_switch ||
5887             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5888                 return -EOPNOTSUPP;
5889
5890         switch (dev->ieee80211_ptr->iftype) {
5891         case NL80211_IFTYPE_AP:
5892         case NL80211_IFTYPE_P2P_GO:
5893                 need_new_beacon = true;
5894
5895                 /* useless if AP is not running */
5896                 if (!wdev->beacon_interval)
5897                         return -ENOTCONN;
5898                 break;
5899         case NL80211_IFTYPE_ADHOC:
5900                 if (!wdev->ssid_len)
5901                         return -ENOTCONN;
5902                 break;
5903         case NL80211_IFTYPE_MESH_POINT:
5904                 if (!wdev->mesh_id_len)
5905                         return -ENOTCONN;
5906                 break;
5907         default:
5908                 return -EOPNOTSUPP;
5909         }
5910
5911         memset(&params, 0, sizeof(params));
5912
5913         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5914             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5915                 return -EINVAL;
5916
5917         /* only important for AP, IBSS and mesh create IEs internally */
5918         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
5919                 return -EINVAL;
5920
5921         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5922
5923         if (!need_new_beacon)
5924                 goto skip_beacons;
5925
5926         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5927         if (err)
5928                 return err;
5929
5930         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5931                                info->attrs[NL80211_ATTR_CSA_IES],
5932                                nl80211_policy);
5933         if (err)
5934                 return err;
5935
5936         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5937         if (err)
5938                 return err;
5939
5940         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5941                 return -EINVAL;
5942
5943         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5944         if (!len || (len % sizeof(u16)))
5945                 return -EINVAL;
5946
5947         params.n_counter_offsets_beacon = len / sizeof(u16);
5948         if (rdev->wiphy.max_num_csa_counters &&
5949             (params.n_counter_offsets_beacon >
5950              rdev->wiphy.max_num_csa_counters))
5951                 return -EINVAL;
5952
5953         params.counter_offsets_beacon =
5954                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5955
5956         /* sanity checks - counters should fit and be the same */
5957         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
5958                 u16 offset = params.counter_offsets_beacon[i];
5959
5960                 if (offset >= params.beacon_csa.tail_len)
5961                         return -EINVAL;
5962
5963                 if (params.beacon_csa.tail[offset] != params.count)
5964                         return -EINVAL;
5965         }
5966
5967         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5968                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5969                 if (!len || (len % sizeof(u16)))
5970                         return -EINVAL;
5971
5972                 params.n_counter_offsets_presp = len / sizeof(u16);
5973                 if (rdev->wiphy.max_num_csa_counters &&
5974                     (params.n_counter_offsets_beacon >
5975                      rdev->wiphy.max_num_csa_counters))
5976                         return -EINVAL;
5977
5978                 params.counter_offsets_presp =
5979                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5980
5981                 /* sanity checks - counters should fit and be the same */
5982                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
5983                         u16 offset = params.counter_offsets_presp[i];
5984
5985                         if (offset >= params.beacon_csa.probe_resp_len)
5986                                 return -EINVAL;
5987
5988                         if (params.beacon_csa.probe_resp[offset] !=
5989                             params.count)
5990                                 return -EINVAL;
5991                 }
5992         }
5993
5994 skip_beacons:
5995         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5996         if (err)
5997                 return err;
5998
5999         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
6000                                      wdev->iftype))
6001                 return -EINVAL;
6002
6003         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6004                                             &params.chandef,
6005                                             wdev->iftype);
6006         if (err < 0)
6007                 return err;
6008
6009         if (err > 0) {
6010                 radar_detect_width = BIT(params.chandef.width);
6011                 params.radar_required = true;
6012         }
6013
6014         /* TODO: I left this here for now.  With channel switch, the
6015          * verification is a bit more complicated, because we only do
6016          * it later when the channel switch really happens.
6017          */
6018         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
6019                                            params.chandef.chan,
6020                                            CHAN_MODE_SHARED,
6021                                            radar_detect_width);
6022         if (err)
6023                 return err;
6024
6025         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6026                 params.block_tx = true;
6027
6028         wdev_lock(wdev);
6029         err = rdev_channel_switch(rdev, dev, &params);
6030         wdev_unlock(wdev);
6031
6032         return err;
6033 }
6034
6035 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6036                             u32 seq, int flags,
6037                             struct cfg80211_registered_device *rdev,
6038                             struct wireless_dev *wdev,
6039                             struct cfg80211_internal_bss *intbss)
6040 {
6041         struct cfg80211_bss *res = &intbss->pub;
6042         const struct cfg80211_bss_ies *ies;
6043         void *hdr;
6044         struct nlattr *bss;
6045         bool tsf = false;
6046
6047         ASSERT_WDEV_LOCK(wdev);
6048
6049         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6050                              NL80211_CMD_NEW_SCAN_RESULTS);
6051         if (!hdr)
6052                 return -1;
6053
6054         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6055
6056         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6057                 goto nla_put_failure;
6058         if (wdev->netdev &&
6059             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6060                 goto nla_put_failure;
6061         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6062                 goto nla_put_failure;
6063
6064         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6065         if (!bss)
6066                 goto nla_put_failure;
6067         if ((!is_zero_ether_addr(res->bssid) &&
6068              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6069                 goto nla_put_failure;
6070
6071         rcu_read_lock();
6072         ies = rcu_dereference(res->ies);
6073         if (ies) {
6074                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6075                         goto fail_unlock_rcu;
6076                 tsf = true;
6077                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6078                                         ies->len, ies->data))
6079                         goto fail_unlock_rcu;
6080         }
6081         ies = rcu_dereference(res->beacon_ies);
6082         if (ies) {
6083                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6084                         goto fail_unlock_rcu;
6085                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6086                                         ies->len, ies->data))
6087                         goto fail_unlock_rcu;
6088         }
6089         rcu_read_unlock();
6090
6091         if (res->beacon_interval &&
6092             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6093                 goto nla_put_failure;
6094         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6095             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6096             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6097             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6098                         jiffies_to_msecs(jiffies - intbss->ts)))
6099                 goto nla_put_failure;
6100
6101         switch (rdev->wiphy.signal_type) {
6102         case CFG80211_SIGNAL_TYPE_MBM:
6103                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6104                         goto nla_put_failure;
6105                 break;
6106         case CFG80211_SIGNAL_TYPE_UNSPEC:
6107                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6108                         goto nla_put_failure;
6109                 break;
6110         default:
6111                 break;
6112         }
6113
6114         switch (wdev->iftype) {
6115         case NL80211_IFTYPE_P2P_CLIENT:
6116         case NL80211_IFTYPE_STATION:
6117                 if (intbss == wdev->current_bss &&
6118                     nla_put_u32(msg, NL80211_BSS_STATUS,
6119                                 NL80211_BSS_STATUS_ASSOCIATED))
6120                         goto nla_put_failure;
6121                 break;
6122         case NL80211_IFTYPE_ADHOC:
6123                 if (intbss == wdev->current_bss &&
6124                     nla_put_u32(msg, NL80211_BSS_STATUS,
6125                                 NL80211_BSS_STATUS_IBSS_JOINED))
6126                         goto nla_put_failure;
6127                 break;
6128         default:
6129                 break;
6130         }
6131
6132         nla_nest_end(msg, bss);
6133
6134         return genlmsg_end(msg, hdr);
6135
6136  fail_unlock_rcu:
6137         rcu_read_unlock();
6138  nla_put_failure:
6139         genlmsg_cancel(msg, hdr);
6140         return -EMSGSIZE;
6141 }
6142
6143 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6144 {
6145         struct cfg80211_registered_device *rdev;
6146         struct cfg80211_internal_bss *scan;
6147         struct wireless_dev *wdev;
6148         int start = cb->args[2], idx = 0;
6149         int err;
6150
6151         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6152         if (err)
6153                 return err;
6154
6155         wdev_lock(wdev);
6156         spin_lock_bh(&rdev->bss_lock);
6157         cfg80211_bss_expire(rdev);
6158
6159         cb->seq = rdev->bss_generation;
6160
6161         list_for_each_entry(scan, &rdev->bss_list, list) {
6162                 if (++idx <= start)
6163                         continue;
6164                 if (nl80211_send_bss(skb, cb,
6165                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6166                                 rdev, wdev, scan) < 0) {
6167                         idx--;
6168                         break;
6169                 }
6170         }
6171
6172         spin_unlock_bh(&rdev->bss_lock);
6173         wdev_unlock(wdev);
6174
6175         cb->args[2] = idx;
6176         nl80211_finish_wdev_dump(rdev);
6177
6178         return skb->len;
6179 }
6180
6181 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6182                                 int flags, struct net_device *dev,
6183                                 struct survey_info *survey)
6184 {
6185         void *hdr;
6186         struct nlattr *infoattr;
6187
6188         hdr = nl80211hdr_put(msg, portid, seq, flags,
6189                              NL80211_CMD_NEW_SURVEY_RESULTS);
6190         if (!hdr)
6191                 return -ENOMEM;
6192
6193         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6194                 goto nla_put_failure;
6195
6196         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6197         if (!infoattr)
6198                 goto nla_put_failure;
6199
6200         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6201                         survey->channel->center_freq))
6202                 goto nla_put_failure;
6203
6204         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6205             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6206                 goto nla_put_failure;
6207         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6208             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6209                 goto nla_put_failure;
6210         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6211             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6212                         survey->channel_time))
6213                 goto nla_put_failure;
6214         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6215             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6216                         survey->channel_time_busy))
6217                 goto nla_put_failure;
6218         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6219             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6220                         survey->channel_time_ext_busy))
6221                 goto nla_put_failure;
6222         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6223             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6224                         survey->channel_time_rx))
6225                 goto nla_put_failure;
6226         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6227             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6228                         survey->channel_time_tx))
6229                 goto nla_put_failure;
6230
6231         nla_nest_end(msg, infoattr);
6232
6233         return genlmsg_end(msg, hdr);
6234
6235  nla_put_failure:
6236         genlmsg_cancel(msg, hdr);
6237         return -EMSGSIZE;
6238 }
6239
6240 static int nl80211_dump_survey(struct sk_buff *skb,
6241                         struct netlink_callback *cb)
6242 {
6243         struct survey_info survey;
6244         struct cfg80211_registered_device *rdev;
6245         struct wireless_dev *wdev;
6246         int survey_idx = cb->args[2];
6247         int res;
6248
6249         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6250         if (res)
6251                 return res;
6252
6253         if (!wdev->netdev) {
6254                 res = -EINVAL;
6255                 goto out_err;
6256         }
6257
6258         if (!rdev->ops->dump_survey) {
6259                 res = -EOPNOTSUPP;
6260                 goto out_err;
6261         }
6262
6263         while (1) {
6264                 struct ieee80211_channel *chan;
6265
6266                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6267                 if (res == -ENOENT)
6268                         break;
6269                 if (res)
6270                         goto out_err;
6271
6272                 /* Survey without a channel doesn't make sense */
6273                 if (!survey.channel) {
6274                         res = -EINVAL;
6275                         goto out;
6276                 }
6277
6278                 chan = ieee80211_get_channel(&rdev->wiphy,
6279                                              survey.channel->center_freq);
6280                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6281                         survey_idx++;
6282                         continue;
6283                 }
6284
6285                 if (nl80211_send_survey(skb,
6286                                 NETLINK_CB(cb->skb).portid,
6287                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6288                                 wdev->netdev, &survey) < 0)
6289                         goto out;
6290                 survey_idx++;
6291         }
6292
6293  out:
6294         cb->args[2] = survey_idx;
6295         res = skb->len;
6296  out_err:
6297         nl80211_finish_wdev_dump(rdev);
6298         return res;
6299 }
6300
6301 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6302 {
6303         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6304                                   NL80211_WPA_VERSION_2));
6305 }
6306
6307 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6308 {
6309         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6310         struct net_device *dev = info->user_ptr[1];
6311         struct ieee80211_channel *chan;
6312         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6313         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6314         enum nl80211_auth_type auth_type;
6315         struct key_parse key;
6316         bool local_state_change;
6317
6318         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6319                 return -EINVAL;
6320
6321         if (!info->attrs[NL80211_ATTR_MAC])
6322                 return -EINVAL;
6323
6324         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6325                 return -EINVAL;
6326
6327         if (!info->attrs[NL80211_ATTR_SSID])
6328                 return -EINVAL;
6329
6330         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6331                 return -EINVAL;
6332
6333         err = nl80211_parse_key(info, &key);
6334         if (err)
6335                 return err;
6336
6337         if (key.idx >= 0) {
6338                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6339                         return -EINVAL;
6340                 if (!key.p.key || !key.p.key_len)
6341                         return -EINVAL;
6342                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6343                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6344                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6345                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6346                         return -EINVAL;
6347                 if (key.idx > 4)
6348                         return -EINVAL;
6349         } else {
6350                 key.p.key_len = 0;
6351                 key.p.key = NULL;
6352         }
6353
6354         if (key.idx >= 0) {
6355                 int i;
6356                 bool ok = false;
6357                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6358                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6359                                 ok = true;
6360                                 break;
6361                         }
6362                 }
6363                 if (!ok)
6364                         return -EINVAL;
6365         }
6366
6367         if (!rdev->ops->auth)
6368                 return -EOPNOTSUPP;
6369
6370         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6371             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6372                 return -EOPNOTSUPP;
6373
6374         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6375         chan = nl80211_get_valid_chan(&rdev->wiphy,
6376                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6377         if (!chan)
6378                 return -EINVAL;
6379
6380         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6381         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6382
6383         if (info->attrs[NL80211_ATTR_IE]) {
6384                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6385                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6386         }
6387
6388         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6389         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6390                 return -EINVAL;
6391
6392         if (auth_type == NL80211_AUTHTYPE_SAE &&
6393             !info->attrs[NL80211_ATTR_SAE_DATA])
6394                 return -EINVAL;
6395
6396         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6397                 if (auth_type != NL80211_AUTHTYPE_SAE)
6398                         return -EINVAL;
6399                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6400                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6401                 /* need to include at least Auth Transaction and Status Code */
6402                 if (sae_data_len < 4)
6403                         return -EINVAL;
6404         }
6405
6406         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6407
6408         /*
6409          * Since we no longer track auth state, ignore
6410          * requests to only change local state.
6411          */
6412         if (local_state_change)
6413                 return 0;
6414
6415         wdev_lock(dev->ieee80211_ptr);
6416         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6417                                  ssid, ssid_len, ie, ie_len,
6418                                  key.p.key, key.p.key_len, key.idx,
6419                                  sae_data, sae_data_len);
6420         wdev_unlock(dev->ieee80211_ptr);
6421         return err;
6422 }
6423
6424 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6425                                    struct genl_info *info,
6426                                    struct cfg80211_crypto_settings *settings,
6427                                    int cipher_limit)
6428 {
6429         memset(settings, 0, sizeof(*settings));
6430
6431         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6432
6433         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6434                 u16 proto;
6435                 proto = nla_get_u16(
6436                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6437                 settings->control_port_ethertype = cpu_to_be16(proto);
6438                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6439                     proto != ETH_P_PAE)
6440                         return -EINVAL;
6441                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6442                         settings->control_port_no_encrypt = true;
6443         } else
6444                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6445
6446         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6447                 void *data;
6448                 int len, i;
6449
6450                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6451                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6452                 settings->n_ciphers_pairwise = len / sizeof(u32);
6453
6454                 if (len % sizeof(u32))
6455                         return -EINVAL;
6456
6457                 if (settings->n_ciphers_pairwise > cipher_limit)
6458                         return -EINVAL;
6459
6460                 memcpy(settings->ciphers_pairwise, data, len);
6461
6462                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6463                         if (!cfg80211_supported_cipher_suite(
6464                                         &rdev->wiphy,
6465                                         settings->ciphers_pairwise[i]))
6466                                 return -EINVAL;
6467         }
6468
6469         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6470                 settings->cipher_group =
6471                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6472                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6473                                                      settings->cipher_group))
6474                         return -EINVAL;
6475         }
6476
6477         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6478                 settings->wpa_versions =
6479                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6480                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6481                         return -EINVAL;
6482         }
6483
6484         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6485                 void *data;
6486                 int len;
6487
6488                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6489                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6490                 settings->n_akm_suites = len / sizeof(u32);
6491
6492                 if (len % sizeof(u32))
6493                         return -EINVAL;
6494
6495                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6496                         return -EINVAL;
6497
6498                 memcpy(settings->akm_suites, data, len);
6499         }
6500
6501         return 0;
6502 }
6503
6504 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6505 {
6506         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6507         struct net_device *dev = info->user_ptr[1];
6508         struct ieee80211_channel *chan;
6509         struct cfg80211_assoc_request req = {};
6510         const u8 *bssid, *ssid;
6511         int err, ssid_len = 0;
6512
6513         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6514                 return -EINVAL;
6515
6516         if (!info->attrs[NL80211_ATTR_MAC] ||
6517             !info->attrs[NL80211_ATTR_SSID] ||
6518             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6519                 return -EINVAL;
6520
6521         if (!rdev->ops->assoc)
6522                 return -EOPNOTSUPP;
6523
6524         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6525             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6526                 return -EOPNOTSUPP;
6527
6528         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6529
6530         chan = nl80211_get_valid_chan(&rdev->wiphy,
6531                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6532         if (!chan)
6533                 return -EINVAL;
6534
6535         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6536         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6537
6538         if (info->attrs[NL80211_ATTR_IE]) {
6539                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6540                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6541         }
6542
6543         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6544                 enum nl80211_mfp mfp =
6545                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6546                 if (mfp == NL80211_MFP_REQUIRED)
6547                         req.use_mfp = true;
6548                 else if (mfp != NL80211_MFP_NO)
6549                         return -EINVAL;
6550         }
6551
6552         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6553                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6554
6555         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6556                 req.flags |= ASSOC_REQ_DISABLE_HT;
6557
6558         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6559                 memcpy(&req.ht_capa_mask,
6560                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6561                        sizeof(req.ht_capa_mask));
6562
6563         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6564                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6565                         return -EINVAL;
6566                 memcpy(&req.ht_capa,
6567                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6568                        sizeof(req.ht_capa));
6569         }
6570
6571         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6572                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6573
6574         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6575                 memcpy(&req.vht_capa_mask,
6576                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6577                        sizeof(req.vht_capa_mask));
6578
6579         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6580                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6581                         return -EINVAL;
6582                 memcpy(&req.vht_capa,
6583                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6584                        sizeof(req.vht_capa));
6585         }
6586
6587         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6588         if (!err) {
6589                 wdev_lock(dev->ieee80211_ptr);
6590                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6591                                           ssid, ssid_len, &req);
6592                 wdev_unlock(dev->ieee80211_ptr);
6593         }
6594
6595         return err;
6596 }
6597
6598 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6599 {
6600         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6601         struct net_device *dev = info->user_ptr[1];
6602         const u8 *ie = NULL, *bssid;
6603         int ie_len = 0, err;
6604         u16 reason_code;
6605         bool local_state_change;
6606
6607         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6608                 return -EINVAL;
6609
6610         if (!info->attrs[NL80211_ATTR_MAC])
6611                 return -EINVAL;
6612
6613         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6614                 return -EINVAL;
6615
6616         if (!rdev->ops->deauth)
6617                 return -EOPNOTSUPP;
6618
6619         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6620             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6621                 return -EOPNOTSUPP;
6622
6623         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6624
6625         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6626         if (reason_code == 0) {
6627                 /* Reason Code 0 is reserved */
6628                 return -EINVAL;
6629         }
6630
6631         if (info->attrs[NL80211_ATTR_IE]) {
6632                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6633                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6634         }
6635
6636         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6637
6638         wdev_lock(dev->ieee80211_ptr);
6639         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6640                                    local_state_change);
6641         wdev_unlock(dev->ieee80211_ptr);
6642         return err;
6643 }
6644
6645 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6646 {
6647         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6648         struct net_device *dev = info->user_ptr[1];
6649         const u8 *ie = NULL, *bssid;
6650         int ie_len = 0, err;
6651         u16 reason_code;
6652         bool local_state_change;
6653
6654         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6655                 return -EINVAL;
6656
6657         if (!info->attrs[NL80211_ATTR_MAC])
6658                 return -EINVAL;
6659
6660         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6661                 return -EINVAL;
6662
6663         if (!rdev->ops->disassoc)
6664                 return -EOPNOTSUPP;
6665
6666         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6667             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6668                 return -EOPNOTSUPP;
6669
6670         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6671
6672         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6673         if (reason_code == 0) {
6674                 /* Reason Code 0 is reserved */
6675                 return -EINVAL;
6676         }
6677
6678         if (info->attrs[NL80211_ATTR_IE]) {
6679                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6680                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6681         }
6682
6683         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6684
6685         wdev_lock(dev->ieee80211_ptr);
6686         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6687                                      local_state_change);
6688         wdev_unlock(dev->ieee80211_ptr);
6689         return err;
6690 }
6691
6692 static bool
6693 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6694                          int mcast_rate[IEEE80211_NUM_BANDS],
6695                          int rateval)
6696 {
6697         struct wiphy *wiphy = &rdev->wiphy;
6698         bool found = false;
6699         int band, i;
6700
6701         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6702                 struct ieee80211_supported_band *sband;
6703
6704                 sband = wiphy->bands[band];
6705                 if (!sband)
6706                         continue;
6707
6708                 for (i = 0; i < sband->n_bitrates; i++) {
6709                         if (sband->bitrates[i].bitrate == rateval) {
6710                                 mcast_rate[band] = i + 1;
6711                                 found = true;
6712                                 break;
6713                         }
6714                 }
6715         }
6716
6717         return found;
6718 }
6719
6720 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6721 {
6722         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6723         struct net_device *dev = info->user_ptr[1];
6724         struct cfg80211_ibss_params ibss;
6725         struct wiphy *wiphy;
6726         struct cfg80211_cached_keys *connkeys = NULL;
6727         int err;
6728
6729         memset(&ibss, 0, sizeof(ibss));
6730
6731         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6732                 return -EINVAL;
6733
6734         if (!info->attrs[NL80211_ATTR_SSID] ||
6735             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6736                 return -EINVAL;
6737
6738         ibss.beacon_interval = 100;
6739
6740         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6741                 ibss.beacon_interval =
6742                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6743                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6744                         return -EINVAL;
6745         }
6746
6747         if (!rdev->ops->join_ibss)
6748                 return -EOPNOTSUPP;
6749
6750         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6751                 return -EOPNOTSUPP;
6752
6753         wiphy = &rdev->wiphy;
6754
6755         if (info->attrs[NL80211_ATTR_MAC]) {
6756                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6757
6758                 if (!is_valid_ether_addr(ibss.bssid))
6759                         return -EINVAL;
6760         }
6761         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6762         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6763
6764         if (info->attrs[NL80211_ATTR_IE]) {
6765                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6766                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6767         }
6768
6769         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6770         if (err)
6771                 return err;
6772
6773         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
6774                                      NL80211_IFTYPE_ADHOC))
6775                 return -EINVAL;
6776
6777         switch (ibss.chandef.width) {
6778         case NL80211_CHAN_WIDTH_5:
6779         case NL80211_CHAN_WIDTH_10:
6780         case NL80211_CHAN_WIDTH_20_NOHT:
6781                 break;
6782         case NL80211_CHAN_WIDTH_20:
6783         case NL80211_CHAN_WIDTH_40:
6784                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6785                         break;
6786         default:
6787                 return -EINVAL;
6788         }
6789
6790         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6791         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6792
6793         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6794                 u8 *rates =
6795                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6796                 int n_rates =
6797                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6798                 struct ieee80211_supported_band *sband =
6799                         wiphy->bands[ibss.chandef.chan->band];
6800
6801                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6802                                              &ibss.basic_rates);
6803                 if (err)
6804                         return err;
6805         }
6806
6807         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6808                 memcpy(&ibss.ht_capa_mask,
6809                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6810                        sizeof(ibss.ht_capa_mask));
6811
6812         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6813                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6814                         return -EINVAL;
6815                 memcpy(&ibss.ht_capa,
6816                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6817                        sizeof(ibss.ht_capa));
6818         }
6819
6820         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6821             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6822                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6823                 return -EINVAL;
6824
6825         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6826                 bool no_ht = false;
6827
6828                 connkeys = nl80211_parse_connkeys(rdev,
6829                                           info->attrs[NL80211_ATTR_KEYS],
6830                                           &no_ht);
6831                 if (IS_ERR(connkeys))
6832                         return PTR_ERR(connkeys);
6833
6834                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6835                     no_ht) {
6836                         kfree(connkeys);
6837                         return -EINVAL;
6838                 }
6839         }
6840
6841         ibss.control_port =
6842                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6843
6844         ibss.userspace_handles_dfs =
6845                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6846
6847         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6848         if (err)
6849                 kfree(connkeys);
6850         return err;
6851 }
6852
6853 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6854 {
6855         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6856         struct net_device *dev = info->user_ptr[1];
6857
6858         if (!rdev->ops->leave_ibss)
6859                 return -EOPNOTSUPP;
6860
6861         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6862                 return -EOPNOTSUPP;
6863
6864         return cfg80211_leave_ibss(rdev, dev, false);
6865 }
6866
6867 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6868 {
6869         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6870         struct net_device *dev = info->user_ptr[1];
6871         int mcast_rate[IEEE80211_NUM_BANDS];
6872         u32 nla_rate;
6873         int err;
6874
6875         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6876             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6877                 return -EOPNOTSUPP;
6878
6879         if (!rdev->ops->set_mcast_rate)
6880                 return -EOPNOTSUPP;
6881
6882         memset(mcast_rate, 0, sizeof(mcast_rate));
6883
6884         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6885                 return -EINVAL;
6886
6887         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6888         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6889                 return -EINVAL;
6890
6891         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6892
6893         return err;
6894 }
6895
6896 static struct sk_buff *
6897 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
6898                             int approxlen, u32 portid, u32 seq,
6899                             enum nl80211_commands cmd,
6900                             enum nl80211_attrs attr,
6901                             const struct nl80211_vendor_cmd_info *info,
6902                             gfp_t gfp)
6903 {
6904         struct sk_buff *skb;
6905         void *hdr;
6906         struct nlattr *data;
6907
6908         skb = nlmsg_new(approxlen + 100, gfp);
6909         if (!skb)
6910                 return NULL;
6911
6912         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
6913         if (!hdr) {
6914                 kfree_skb(skb);
6915                 return NULL;
6916         }
6917
6918         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6919                 goto nla_put_failure;
6920
6921         if (info) {
6922                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
6923                                 info->vendor_id))
6924                         goto nla_put_failure;
6925                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
6926                                 info->subcmd))
6927                         goto nla_put_failure;
6928         }
6929
6930         data = nla_nest_start(skb, attr);
6931
6932         ((void **)skb->cb)[0] = rdev;
6933         ((void **)skb->cb)[1] = hdr;
6934         ((void **)skb->cb)[2] = data;
6935
6936         return skb;
6937
6938  nla_put_failure:
6939         kfree_skb(skb);
6940         return NULL;
6941 }
6942
6943 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
6944                                            enum nl80211_commands cmd,
6945                                            enum nl80211_attrs attr,
6946                                            int vendor_event_idx,
6947                                            int approxlen, gfp_t gfp)
6948 {
6949         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
6950         const struct nl80211_vendor_cmd_info *info;
6951
6952         switch (cmd) {
6953         case NL80211_CMD_TESTMODE:
6954                 if (WARN_ON(vendor_event_idx != -1))
6955                         return NULL;
6956                 info = NULL;
6957                 break;
6958         case NL80211_CMD_VENDOR:
6959                 if (WARN_ON(vendor_event_idx < 0 ||
6960                             vendor_event_idx >= wiphy->n_vendor_events))
6961                         return NULL;
6962                 info = &wiphy->vendor_events[vendor_event_idx];
6963                 break;
6964         default:
6965                 WARN_ON(1);
6966                 return NULL;
6967         }
6968
6969         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
6970                                            cmd, attr, info, gfp);
6971 }
6972 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
6973
6974 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
6975 {
6976         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6977         void *hdr = ((void **)skb->cb)[1];
6978         struct nlattr *data = ((void **)skb->cb)[2];
6979         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
6980
6981         nla_nest_end(skb, data);
6982         genlmsg_end(skb, hdr);
6983
6984         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
6985                 mcgrp = NL80211_MCGRP_VENDOR;
6986
6987         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
6988                                 mcgrp, gfp);
6989 }
6990 EXPORT_SYMBOL(__cfg80211_send_event_skb);
6991
6992 #ifdef CONFIG_NL80211_TESTMODE
6993 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6994 {
6995         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6996         struct wireless_dev *wdev =
6997                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6998         int err;
6999
7000         if (!rdev->ops->testmode_cmd)
7001                 return -EOPNOTSUPP;
7002
7003         if (IS_ERR(wdev)) {
7004                 err = PTR_ERR(wdev);
7005                 if (err != -EINVAL)
7006                         return err;
7007                 wdev = NULL;
7008         } else if (wdev->wiphy != &rdev->wiphy) {
7009                 return -EINVAL;
7010         }
7011
7012         if (!info->attrs[NL80211_ATTR_TESTDATA])
7013                 return -EINVAL;
7014
7015         rdev->cur_cmd_info = info;
7016         err = rdev_testmode_cmd(rdev, wdev,
7017                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7018                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7019         rdev->cur_cmd_info = NULL;
7020
7021         return err;
7022 }
7023
7024 static int nl80211_testmode_dump(struct sk_buff *skb,
7025                                  struct netlink_callback *cb)
7026 {
7027         struct cfg80211_registered_device *rdev;
7028         int err;
7029         long phy_idx;
7030         void *data = NULL;
7031         int data_len = 0;
7032
7033         rtnl_lock();
7034
7035         if (cb->args[0]) {
7036                 /*
7037                  * 0 is a valid index, but not valid for args[0],
7038                  * so we need to offset by 1.
7039                  */
7040                 phy_idx = cb->args[0] - 1;
7041         } else {
7042                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7043                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7044                                   nl80211_policy);
7045                 if (err)
7046                         goto out_err;
7047
7048                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7049                                                   nl80211_fam.attrbuf);
7050                 if (IS_ERR(rdev)) {
7051                         err = PTR_ERR(rdev);
7052                         goto out_err;
7053                 }
7054                 phy_idx = rdev->wiphy_idx;
7055                 rdev = NULL;
7056
7057                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7058                         cb->args[1] =
7059                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7060         }
7061
7062         if (cb->args[1]) {
7063                 data = nla_data((void *)cb->args[1]);
7064                 data_len = nla_len((void *)cb->args[1]);
7065         }
7066
7067         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7068         if (!rdev) {
7069                 err = -ENOENT;
7070                 goto out_err;
7071         }
7072
7073         if (!rdev->ops->testmode_dump) {
7074                 err = -EOPNOTSUPP;
7075                 goto out_err;
7076         }
7077
7078         while (1) {
7079                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7080                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7081                                            NL80211_CMD_TESTMODE);
7082                 struct nlattr *tmdata;
7083
7084                 if (!hdr)
7085                         break;
7086
7087                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7088                         genlmsg_cancel(skb, hdr);
7089                         break;
7090                 }
7091
7092                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7093                 if (!tmdata) {
7094                         genlmsg_cancel(skb, hdr);
7095                         break;
7096                 }
7097                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7098                 nla_nest_end(skb, tmdata);
7099
7100                 if (err == -ENOBUFS || err == -ENOENT) {
7101                         genlmsg_cancel(skb, hdr);
7102                         break;
7103                 } else if (err) {
7104                         genlmsg_cancel(skb, hdr);
7105                         goto out_err;
7106                 }
7107
7108                 genlmsg_end(skb, hdr);
7109         }
7110
7111         err = skb->len;
7112         /* see above */
7113         cb->args[0] = phy_idx + 1;
7114  out_err:
7115         rtnl_unlock();
7116         return err;
7117 }
7118 #endif
7119
7120 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7121 {
7122         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7123         struct net_device *dev = info->user_ptr[1];
7124         struct cfg80211_connect_params connect;
7125         struct wiphy *wiphy;
7126         struct cfg80211_cached_keys *connkeys = NULL;
7127         int err;
7128
7129         memset(&connect, 0, sizeof(connect));
7130
7131         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7132                 return -EINVAL;
7133
7134         if (!info->attrs[NL80211_ATTR_SSID] ||
7135             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7136                 return -EINVAL;
7137
7138         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7139                 connect.auth_type =
7140                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7141                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7142                                              NL80211_CMD_CONNECT))
7143                         return -EINVAL;
7144         } else
7145                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7146
7147         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7148
7149         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7150                                       NL80211_MAX_NR_CIPHER_SUITES);
7151         if (err)
7152                 return err;
7153
7154         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7155             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7156                 return -EOPNOTSUPP;
7157
7158         wiphy = &rdev->wiphy;
7159
7160         connect.bg_scan_period = -1;
7161         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7162                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7163                 connect.bg_scan_period =
7164                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7165         }
7166
7167         if (info->attrs[NL80211_ATTR_MAC])
7168                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7169         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7170                 connect.bssid_hint =
7171                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7172         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7173         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7174
7175         if (info->attrs[NL80211_ATTR_IE]) {
7176                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7177                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7178         }
7179
7180         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7181                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7182                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7183                     connect.mfp != NL80211_MFP_NO)
7184                         return -EINVAL;
7185         } else {
7186                 connect.mfp = NL80211_MFP_NO;
7187         }
7188
7189         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7190                 connect.channel = nl80211_get_valid_chan(
7191                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7192                 if (!connect.channel)
7193                         return -EINVAL;
7194         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7195                 connect.channel_hint = nl80211_get_valid_chan(
7196                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7197                 if (!connect.channel_hint)
7198                         return -EINVAL;
7199         }
7200
7201         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7202                 connkeys = nl80211_parse_connkeys(rdev,
7203                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7204                 if (IS_ERR(connkeys))
7205                         return PTR_ERR(connkeys);
7206         }
7207
7208         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7209                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7210
7211         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7212                 memcpy(&connect.ht_capa_mask,
7213                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7214                        sizeof(connect.ht_capa_mask));
7215
7216         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7217                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7218                         kfree(connkeys);
7219                         return -EINVAL;
7220                 }
7221                 memcpy(&connect.ht_capa,
7222                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7223                        sizeof(connect.ht_capa));
7224         }
7225
7226         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7227                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7228
7229         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7230                 memcpy(&connect.vht_capa_mask,
7231                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7232                        sizeof(connect.vht_capa_mask));
7233
7234         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7235                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7236                         kfree(connkeys);
7237                         return -EINVAL;
7238                 }
7239                 memcpy(&connect.vht_capa,
7240                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7241                        sizeof(connect.vht_capa));
7242         }
7243
7244         wdev_lock(dev->ieee80211_ptr);
7245         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7246         wdev_unlock(dev->ieee80211_ptr);
7247         if (err)
7248                 kfree(connkeys);
7249         return err;
7250 }
7251
7252 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7253 {
7254         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7255         struct net_device *dev = info->user_ptr[1];
7256         u16 reason;
7257         int ret;
7258
7259         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7260                 reason = WLAN_REASON_DEAUTH_LEAVING;
7261         else
7262                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7263
7264         if (reason == 0)
7265                 return -EINVAL;
7266
7267         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7268             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7269                 return -EOPNOTSUPP;
7270
7271         wdev_lock(dev->ieee80211_ptr);
7272         ret = cfg80211_disconnect(rdev, dev, reason, true);
7273         wdev_unlock(dev->ieee80211_ptr);
7274         return ret;
7275 }
7276
7277 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7278 {
7279         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7280         struct net *net;
7281         int err;
7282         u32 pid;
7283
7284         if (!info->attrs[NL80211_ATTR_PID])
7285                 return -EINVAL;
7286
7287         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7288
7289         net = get_net_ns_by_pid(pid);
7290         if (IS_ERR(net))
7291                 return PTR_ERR(net);
7292
7293         err = 0;
7294
7295         /* check if anything to do */
7296         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7297                 err = cfg80211_switch_netns(rdev, net);
7298
7299         put_net(net);
7300         return err;
7301 }
7302
7303 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7304 {
7305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7306         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7307                         struct cfg80211_pmksa *pmksa) = NULL;
7308         struct net_device *dev = info->user_ptr[1];
7309         struct cfg80211_pmksa pmksa;
7310
7311         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7312
7313         if (!info->attrs[NL80211_ATTR_MAC])
7314                 return -EINVAL;
7315
7316         if (!info->attrs[NL80211_ATTR_PMKID])
7317                 return -EINVAL;
7318
7319         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7320         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7321
7322         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7323             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7324                 return -EOPNOTSUPP;
7325
7326         switch (info->genlhdr->cmd) {
7327         case NL80211_CMD_SET_PMKSA:
7328                 rdev_ops = rdev->ops->set_pmksa;
7329                 break;
7330         case NL80211_CMD_DEL_PMKSA:
7331                 rdev_ops = rdev->ops->del_pmksa;
7332                 break;
7333         default:
7334                 WARN_ON(1);
7335                 break;
7336         }
7337
7338         if (!rdev_ops)
7339                 return -EOPNOTSUPP;
7340
7341         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7342 }
7343
7344 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7345 {
7346         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7347         struct net_device *dev = info->user_ptr[1];
7348
7349         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7350             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7351                 return -EOPNOTSUPP;
7352
7353         if (!rdev->ops->flush_pmksa)
7354                 return -EOPNOTSUPP;
7355
7356         return rdev_flush_pmksa(rdev, dev);
7357 }
7358
7359 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7360 {
7361         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7362         struct net_device *dev = info->user_ptr[1];
7363         u8 action_code, dialog_token;
7364         u32 peer_capability = 0;
7365         u16 status_code;
7366         u8 *peer;
7367
7368         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7369             !rdev->ops->tdls_mgmt)
7370                 return -EOPNOTSUPP;
7371
7372         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7373             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7374             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7375             !info->attrs[NL80211_ATTR_IE] ||
7376             !info->attrs[NL80211_ATTR_MAC])
7377                 return -EINVAL;
7378
7379         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7380         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7381         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7382         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7383         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
7384                 peer_capability =
7385                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
7386
7387         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7388                               dialog_token, status_code, peer_capability,
7389                               nla_data(info->attrs[NL80211_ATTR_IE]),
7390                               nla_len(info->attrs[NL80211_ATTR_IE]));
7391 }
7392
7393 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7394 {
7395         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7396         struct net_device *dev = info->user_ptr[1];
7397         enum nl80211_tdls_operation operation;
7398         u8 *peer;
7399
7400         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7401             !rdev->ops->tdls_oper)
7402                 return -EOPNOTSUPP;
7403
7404         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7405             !info->attrs[NL80211_ATTR_MAC])
7406                 return -EINVAL;
7407
7408         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7409         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7410
7411         return rdev_tdls_oper(rdev, dev, peer, operation);
7412 }
7413
7414 static int nl80211_remain_on_channel(struct sk_buff *skb,
7415                                      struct genl_info *info)
7416 {
7417         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7418         struct wireless_dev *wdev = info->user_ptr[1];
7419         struct cfg80211_chan_def chandef;
7420         struct sk_buff *msg;
7421         void *hdr;
7422         u64 cookie;
7423         u32 duration;
7424         int err;
7425
7426         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7427             !info->attrs[NL80211_ATTR_DURATION])
7428                 return -EINVAL;
7429
7430         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7431
7432         if (!rdev->ops->remain_on_channel ||
7433             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7434                 return -EOPNOTSUPP;
7435
7436         /*
7437          * We should be on that channel for at least a minimum amount of
7438          * time (10ms) but no longer than the driver supports.
7439          */
7440         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7441             duration > rdev->wiphy.max_remain_on_channel_duration)
7442                 return -EINVAL;
7443
7444         err = nl80211_parse_chandef(rdev, info, &chandef);
7445         if (err)
7446                 return err;
7447
7448         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7449         if (!msg)
7450                 return -ENOMEM;
7451
7452         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7453                              NL80211_CMD_REMAIN_ON_CHANNEL);
7454         if (!hdr) {
7455                 err = -ENOBUFS;
7456                 goto free_msg;
7457         }
7458
7459         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7460                                      duration, &cookie);
7461
7462         if (err)
7463                 goto free_msg;
7464
7465         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7466                 goto nla_put_failure;
7467
7468         genlmsg_end(msg, hdr);
7469
7470         return genlmsg_reply(msg, info);
7471
7472  nla_put_failure:
7473         err = -ENOBUFS;
7474  free_msg:
7475         nlmsg_free(msg);
7476         return err;
7477 }
7478
7479 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7480                                             struct genl_info *info)
7481 {
7482         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7483         struct wireless_dev *wdev = info->user_ptr[1];
7484         u64 cookie;
7485
7486         if (!info->attrs[NL80211_ATTR_COOKIE])
7487                 return -EINVAL;
7488
7489         if (!rdev->ops->cancel_remain_on_channel)
7490                 return -EOPNOTSUPP;
7491
7492         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7493
7494         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7495 }
7496
7497 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7498                            u8 *rates, u8 rates_len)
7499 {
7500         u8 i;
7501         u32 mask = 0;
7502
7503         for (i = 0; i < rates_len; i++) {
7504                 int rate = (rates[i] & 0x7f) * 5;
7505                 int ridx;
7506                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7507                         struct ieee80211_rate *srate =
7508                                 &sband->bitrates[ridx];
7509                         if (rate == srate->bitrate) {
7510                                 mask |= 1 << ridx;
7511                                 break;
7512                         }
7513                 }
7514                 if (ridx == sband->n_bitrates)
7515                         return 0; /* rate not found */
7516         }
7517
7518         return mask;
7519 }
7520
7521 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7522                                u8 *rates, u8 rates_len,
7523                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7524 {
7525         u8 i;
7526
7527         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7528
7529         for (i = 0; i < rates_len; i++) {
7530                 int ridx, rbit;
7531
7532                 ridx = rates[i] / 8;
7533                 rbit = BIT(rates[i] % 8);
7534
7535                 /* check validity */
7536                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7537                         return false;
7538
7539                 /* check availability */
7540                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7541                         mcs[ridx] |= rbit;
7542                 else
7543                         return false;
7544         }
7545
7546         return true;
7547 }
7548
7549 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
7550 {
7551         u16 mcs_mask = 0;
7552
7553         switch (vht_mcs_map) {
7554         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
7555                 break;
7556         case IEEE80211_VHT_MCS_SUPPORT_0_7:
7557                 mcs_mask = 0x00FF;
7558                 break;
7559         case IEEE80211_VHT_MCS_SUPPORT_0_8:
7560                 mcs_mask = 0x01FF;
7561                 break;
7562         case IEEE80211_VHT_MCS_SUPPORT_0_9:
7563                 mcs_mask = 0x03FF;
7564                 break;
7565         default:
7566                 break;
7567         }
7568
7569         return mcs_mask;
7570 }
7571
7572 static void vht_build_mcs_mask(u16 vht_mcs_map,
7573                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
7574 {
7575         u8 nss;
7576
7577         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
7578                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
7579                 vht_mcs_map >>= 2;
7580         }
7581 }
7582
7583 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
7584                              struct nl80211_txrate_vht *txrate,
7585                              u16 mcs[NL80211_VHT_NSS_MAX])
7586 {
7587         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7588         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
7589         u8 i;
7590
7591         if (!sband->vht_cap.vht_supported)
7592                 return false;
7593
7594         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
7595
7596         /* Build vht_mcs_mask from VHT capabilities */
7597         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
7598
7599         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
7600                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
7601                         mcs[i] = txrate->mcs[i];
7602                 else
7603                         return false;
7604         }
7605
7606         return true;
7607 }
7608
7609 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7610         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7611                                     .len = NL80211_MAX_SUPP_RATES },
7612         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
7613                                 .len = NL80211_MAX_SUPP_HT_RATES },
7614         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
7615         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
7616 };
7617
7618 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7619                                        struct genl_info *info)
7620 {
7621         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7622         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7623         struct cfg80211_bitrate_mask mask;
7624         int rem, i;
7625         struct net_device *dev = info->user_ptr[1];
7626         struct nlattr *tx_rates;
7627         struct ieee80211_supported_band *sband;
7628         u16 vht_tx_mcs_map;
7629
7630         if (!rdev->ops->set_bitrate_mask)
7631                 return -EOPNOTSUPP;
7632
7633         memset(&mask, 0, sizeof(mask));
7634         /* Default to all rates enabled */
7635         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7636                 sband = rdev->wiphy.bands[i];
7637
7638                 if (!sband)
7639                         continue;
7640
7641                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
7642                 memcpy(mask.control[i].ht_mcs,
7643                        sband->ht_cap.mcs.rx_mask,
7644                        sizeof(mask.control[i].ht_mcs));
7645
7646                 if (!sband->vht_cap.vht_supported)
7647                         continue;
7648
7649                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7650                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
7651         }
7652
7653         /* if no rates are given set it back to the defaults */
7654         if (!info->attrs[NL80211_ATTR_TX_RATES])
7655                 goto out;
7656
7657         /*
7658          * The nested attribute uses enum nl80211_band as the index. This maps
7659          * directly to the enum ieee80211_band values used in cfg80211.
7660          */
7661         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7662         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
7663                 enum ieee80211_band band = nla_type(tx_rates);
7664                 int err;
7665
7666                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7667                         return -EINVAL;
7668                 sband = rdev->wiphy.bands[band];
7669                 if (sband == NULL)
7670                         return -EINVAL;
7671                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7672                                 nla_len(tx_rates), nl80211_txattr_policy);
7673                 if (err)
7674                         return err;
7675                 if (tb[NL80211_TXRATE_LEGACY]) {
7676                         mask.control[band].legacy = rateset_to_mask(
7677                                 sband,
7678                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7679                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7680                         if ((mask.control[band].legacy == 0) &&
7681                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7682                                 return -EINVAL;
7683                 }
7684                 if (tb[NL80211_TXRATE_HT]) {
7685                         if (!ht_rateset_to_mask(
7686                                         sband,
7687                                         nla_data(tb[NL80211_TXRATE_HT]),
7688                                         nla_len(tb[NL80211_TXRATE_HT]),
7689                                         mask.control[band].ht_mcs))
7690                                 return -EINVAL;
7691                 }
7692                 if (tb[NL80211_TXRATE_VHT]) {
7693                         if (!vht_set_mcs_mask(
7694                                         sband,
7695                                         nla_data(tb[NL80211_TXRATE_VHT]),
7696                                         mask.control[band].vht_mcs))
7697                                 return -EINVAL;
7698                 }
7699                 if (tb[NL80211_TXRATE_GI]) {
7700                         mask.control[band].gi =
7701                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
7702                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
7703                                 return -EINVAL;
7704                 }
7705
7706                 if (mask.control[band].legacy == 0) {
7707                         /* don't allow empty legacy rates if HT or VHT
7708                          * are not even supported.
7709                          */
7710                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
7711                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
7712                                 return -EINVAL;
7713
7714                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7715                                 if (mask.control[band].ht_mcs[i])
7716                                         goto out;
7717
7718                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
7719                                 if (mask.control[band].vht_mcs[i])
7720                                         goto out;
7721
7722                         /* legacy and mcs rates may not be both empty */
7723                         return -EINVAL;
7724                 }
7725         }
7726
7727 out:
7728         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7729 }
7730
7731 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7732 {
7733         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7734         struct wireless_dev *wdev = info->user_ptr[1];
7735         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7736
7737         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7738                 return -EINVAL;
7739
7740         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7741                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7742
7743         switch (wdev->iftype) {
7744         case NL80211_IFTYPE_STATION:
7745         case NL80211_IFTYPE_ADHOC:
7746         case NL80211_IFTYPE_P2P_CLIENT:
7747         case NL80211_IFTYPE_AP:
7748         case NL80211_IFTYPE_AP_VLAN:
7749         case NL80211_IFTYPE_MESH_POINT:
7750         case NL80211_IFTYPE_P2P_GO:
7751         case NL80211_IFTYPE_P2P_DEVICE:
7752                 break;
7753         default:
7754                 return -EOPNOTSUPP;
7755         }
7756
7757         /* not much point in registering if we can't reply */
7758         if (!rdev->ops->mgmt_tx)
7759                 return -EOPNOTSUPP;
7760
7761         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7762                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7763                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7764 }
7765
7766 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7767 {
7768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7769         struct wireless_dev *wdev = info->user_ptr[1];
7770         struct cfg80211_chan_def chandef;
7771         int err;
7772         void *hdr = NULL;
7773         u64 cookie;
7774         struct sk_buff *msg = NULL;
7775         struct cfg80211_mgmt_tx_params params = {
7776                 .dont_wait_for_ack =
7777                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
7778         };
7779
7780         if (!info->attrs[NL80211_ATTR_FRAME])
7781                 return -EINVAL;
7782
7783         if (!rdev->ops->mgmt_tx)
7784                 return -EOPNOTSUPP;
7785
7786         switch (wdev->iftype) {
7787         case NL80211_IFTYPE_P2P_DEVICE:
7788                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7789                         return -EINVAL;
7790         case NL80211_IFTYPE_STATION:
7791         case NL80211_IFTYPE_ADHOC:
7792         case NL80211_IFTYPE_P2P_CLIENT:
7793         case NL80211_IFTYPE_AP:
7794         case NL80211_IFTYPE_AP_VLAN:
7795         case NL80211_IFTYPE_MESH_POINT:
7796         case NL80211_IFTYPE_P2P_GO:
7797                 break;
7798         default:
7799                 return -EOPNOTSUPP;
7800         }
7801
7802         if (info->attrs[NL80211_ATTR_DURATION]) {
7803                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7804                         return -EINVAL;
7805                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7806
7807                 /*
7808                  * We should wait on the channel for at least a minimum amount
7809                  * of time (10ms) but no longer than the driver supports.
7810                  */
7811                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7812                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
7813                         return -EINVAL;
7814
7815         }
7816
7817         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7818
7819         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7820                 return -EINVAL;
7821
7822         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7823
7824         /* get the channel if any has been specified, otherwise pass NULL to
7825          * the driver. The latter will use the current one
7826          */
7827         chandef.chan = NULL;
7828         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7829                 err = nl80211_parse_chandef(rdev, info, &chandef);
7830                 if (err)
7831                         return err;
7832         }
7833
7834         if (!chandef.chan && params.offchan)
7835                 return -EINVAL;
7836
7837         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
7838         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
7839
7840         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
7841                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
7842                 int i;
7843
7844                 if (len % sizeof(u16))
7845                         return -EINVAL;
7846
7847                 params.n_csa_offsets = len / sizeof(u16);
7848                 params.csa_offsets =
7849                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
7850
7851                 /* check that all the offsets fit the frame */
7852                 for (i = 0; i < params.n_csa_offsets; i++) {
7853                         if (params.csa_offsets[i] >= params.len)
7854                                 return -EINVAL;
7855                 }
7856         }
7857
7858         if (!params.dont_wait_for_ack) {
7859                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7860                 if (!msg)
7861                         return -ENOMEM;
7862
7863                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7864                                      NL80211_CMD_FRAME);
7865                 if (!hdr) {
7866                         err = -ENOBUFS;
7867                         goto free_msg;
7868                 }
7869         }
7870
7871         params.chan = chandef.chan;
7872         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
7873         if (err)
7874                 goto free_msg;
7875
7876         if (msg) {
7877                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7878                         goto nla_put_failure;
7879
7880                 genlmsg_end(msg, hdr);
7881                 return genlmsg_reply(msg, info);
7882         }
7883
7884         return 0;
7885
7886  nla_put_failure:
7887         err = -ENOBUFS;
7888  free_msg:
7889         nlmsg_free(msg);
7890         return err;
7891 }
7892
7893 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7894 {
7895         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7896         struct wireless_dev *wdev = info->user_ptr[1];
7897         u64 cookie;
7898
7899         if (!info->attrs[NL80211_ATTR_COOKIE])
7900                 return -EINVAL;
7901
7902         if (!rdev->ops->mgmt_tx_cancel_wait)
7903                 return -EOPNOTSUPP;
7904
7905         switch (wdev->iftype) {
7906         case NL80211_IFTYPE_STATION:
7907         case NL80211_IFTYPE_ADHOC:
7908         case NL80211_IFTYPE_P2P_CLIENT:
7909         case NL80211_IFTYPE_AP:
7910         case NL80211_IFTYPE_AP_VLAN:
7911         case NL80211_IFTYPE_P2P_GO:
7912         case NL80211_IFTYPE_P2P_DEVICE:
7913                 break;
7914         default:
7915                 return -EOPNOTSUPP;
7916         }
7917
7918         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7919
7920         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7921 }
7922
7923 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7924 {
7925         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7926         struct wireless_dev *wdev;
7927         struct net_device *dev = info->user_ptr[1];
7928         u8 ps_state;
7929         bool state;
7930         int err;
7931
7932         if (!info->attrs[NL80211_ATTR_PS_STATE])
7933                 return -EINVAL;
7934
7935         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7936
7937         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7938                 return -EINVAL;
7939
7940         wdev = dev->ieee80211_ptr;
7941
7942         if (!rdev->ops->set_power_mgmt)
7943                 return -EOPNOTSUPP;
7944
7945         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7946
7947         if (state == wdev->ps)
7948                 return 0;
7949
7950         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7951         if (!err)
7952                 wdev->ps = state;
7953         return err;
7954 }
7955
7956 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7957 {
7958         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7959         enum nl80211_ps_state ps_state;
7960         struct wireless_dev *wdev;
7961         struct net_device *dev = info->user_ptr[1];
7962         struct sk_buff *msg;
7963         void *hdr;
7964         int err;
7965
7966         wdev = dev->ieee80211_ptr;
7967
7968         if (!rdev->ops->set_power_mgmt)
7969                 return -EOPNOTSUPP;
7970
7971         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7972         if (!msg)
7973                 return -ENOMEM;
7974
7975         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7976                              NL80211_CMD_GET_POWER_SAVE);
7977         if (!hdr) {
7978                 err = -ENOBUFS;
7979                 goto free_msg;
7980         }
7981
7982         if (wdev->ps)
7983                 ps_state = NL80211_PS_ENABLED;
7984         else
7985                 ps_state = NL80211_PS_DISABLED;
7986
7987         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7988                 goto nla_put_failure;
7989
7990         genlmsg_end(msg, hdr);
7991         return genlmsg_reply(msg, info);
7992
7993  nla_put_failure:
7994         err = -ENOBUFS;
7995  free_msg:
7996         nlmsg_free(msg);
7997         return err;
7998 }
7999
8000 static const struct nla_policy
8001 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8002         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8003         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8004         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8005         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8006         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8007         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8008 };
8009
8010 static int nl80211_set_cqm_txe(struct genl_info *info,
8011                                u32 rate, u32 pkts, u32 intvl)
8012 {
8013         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8014         struct net_device *dev = info->user_ptr[1];
8015         struct wireless_dev *wdev = dev->ieee80211_ptr;
8016
8017         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8018                 return -EINVAL;
8019
8020         if (!rdev->ops->set_cqm_txe_config)
8021                 return -EOPNOTSUPP;
8022
8023         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8024             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8025                 return -EOPNOTSUPP;
8026
8027         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8028 }
8029
8030 static int nl80211_set_cqm_rssi(struct genl_info *info,
8031                                 s32 threshold, u32 hysteresis)
8032 {
8033         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8034         struct net_device *dev = info->user_ptr[1];
8035         struct wireless_dev *wdev = dev->ieee80211_ptr;
8036
8037         if (threshold > 0)
8038                 return -EINVAL;
8039
8040         /* disabling - hysteresis should also be zero then */
8041         if (threshold == 0)
8042                 hysteresis = 0;
8043
8044         if (!rdev->ops->set_cqm_rssi_config)
8045                 return -EOPNOTSUPP;
8046
8047         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8048             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8049                 return -EOPNOTSUPP;
8050
8051         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8052 }
8053
8054 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8055 {
8056         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8057         struct nlattr *cqm;
8058         int err;
8059
8060         cqm = info->attrs[NL80211_ATTR_CQM];
8061         if (!cqm)
8062                 return -EINVAL;
8063
8064         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8065                                nl80211_attr_cqm_policy);
8066         if (err)
8067                 return err;
8068
8069         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8070             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8071                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8072                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8073
8074                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8075         }
8076
8077         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8078             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8079             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8080                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8081                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8082                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8083
8084                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8085         }
8086
8087         return -EINVAL;
8088 }
8089
8090 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8091 {
8092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8093         struct net_device *dev = info->user_ptr[1];
8094         struct mesh_config cfg;
8095         struct mesh_setup setup;
8096         int err;
8097
8098         /* start with default */
8099         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8100         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8101
8102         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8103                 /* and parse parameters if given */
8104                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8105                 if (err)
8106                         return err;
8107         }
8108
8109         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8110             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8111                 return -EINVAL;
8112
8113         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8114         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8115
8116         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8117             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8118                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8119                         return -EINVAL;
8120
8121         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8122                 setup.beacon_interval =
8123                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8124                 if (setup.beacon_interval < 10 ||
8125                     setup.beacon_interval > 10000)
8126                         return -EINVAL;
8127         }
8128
8129         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8130                 setup.dtim_period =
8131                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8132                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8133                         return -EINVAL;
8134         }
8135
8136         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8137                 /* parse additional setup parameters if given */
8138                 err = nl80211_parse_mesh_setup(info, &setup);
8139                 if (err)
8140                         return err;
8141         }
8142
8143         if (setup.user_mpm)
8144                 cfg.auto_open_plinks = false;
8145
8146         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8147                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8148                 if (err)
8149                         return err;
8150         } else {
8151                 /* cfg80211_join_mesh() will sort it out */
8152                 setup.chandef.chan = NULL;
8153         }
8154
8155         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8156                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8157                 int n_rates =
8158                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8159                 struct ieee80211_supported_band *sband;
8160
8161                 if (!setup.chandef.chan)
8162                         return -EINVAL;
8163
8164                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8165
8166                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8167                                              &setup.basic_rates);
8168                 if (err)
8169                         return err;
8170         }
8171
8172         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8173 }
8174
8175 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8176 {
8177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8178         struct net_device *dev = info->user_ptr[1];
8179
8180         return cfg80211_leave_mesh(rdev, dev);
8181 }
8182
8183 #ifdef CONFIG_PM
8184 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8185                                         struct cfg80211_registered_device *rdev)
8186 {
8187         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8188         struct nlattr *nl_pats, *nl_pat;
8189         int i, pat_len;
8190
8191         if (!wowlan->n_patterns)
8192                 return 0;
8193
8194         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8195         if (!nl_pats)
8196                 return -ENOBUFS;
8197
8198         for (i = 0; i < wowlan->n_patterns; i++) {
8199                 nl_pat = nla_nest_start(msg, i + 1);
8200                 if (!nl_pat)
8201                         return -ENOBUFS;
8202                 pat_len = wowlan->patterns[i].pattern_len;
8203                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8204                             wowlan->patterns[i].mask) ||
8205                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8206                             wowlan->patterns[i].pattern) ||
8207                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8208                                 wowlan->patterns[i].pkt_offset))
8209                         return -ENOBUFS;
8210                 nla_nest_end(msg, nl_pat);
8211         }
8212         nla_nest_end(msg, nl_pats);
8213
8214         return 0;
8215 }
8216
8217 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8218                                    struct cfg80211_wowlan_tcp *tcp)
8219 {
8220         struct nlattr *nl_tcp;
8221
8222         if (!tcp)
8223                 return 0;
8224
8225         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8226         if (!nl_tcp)
8227                 return -ENOBUFS;
8228
8229         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8230             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8231             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8232             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8233             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8234             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8235                     tcp->payload_len, tcp->payload) ||
8236             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8237                         tcp->data_interval) ||
8238             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8239                     tcp->wake_len, tcp->wake_data) ||
8240             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8241                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8242                 return -ENOBUFS;
8243
8244         if (tcp->payload_seq.len &&
8245             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8246                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8247                 return -ENOBUFS;
8248
8249         if (tcp->payload_tok.len &&
8250             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8251                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8252                     &tcp->payload_tok))
8253                 return -ENOBUFS;
8254
8255         nla_nest_end(msg, nl_tcp);
8256
8257         return 0;
8258 }
8259
8260 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
8261 {
8262         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8263         struct sk_buff *msg;
8264         void *hdr;
8265         u32 size = NLMSG_DEFAULT_SIZE;
8266
8267         if (!rdev->wiphy.wowlan)
8268                 return -EOPNOTSUPP;
8269
8270         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
8271                 /* adjust size to have room for all the data */
8272                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
8273                         rdev->wiphy.wowlan_config->tcp->payload_len +
8274                         rdev->wiphy.wowlan_config->tcp->wake_len +
8275                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
8276         }
8277
8278         msg = nlmsg_new(size, GFP_KERNEL);
8279         if (!msg)
8280                 return -ENOMEM;
8281
8282         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8283                              NL80211_CMD_GET_WOWLAN);
8284         if (!hdr)
8285                 goto nla_put_failure;
8286
8287         if (rdev->wiphy.wowlan_config) {
8288                 struct nlattr *nl_wowlan;
8289
8290                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
8291                 if (!nl_wowlan)
8292                         goto nla_put_failure;
8293
8294                 if ((rdev->wiphy.wowlan_config->any &&
8295                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
8296                     (rdev->wiphy.wowlan_config->disconnect &&
8297                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
8298                     (rdev->wiphy.wowlan_config->magic_pkt &&
8299                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
8300                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
8301                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
8302                     (rdev->wiphy.wowlan_config->eap_identity_req &&
8303                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
8304                     (rdev->wiphy.wowlan_config->four_way_handshake &&
8305                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
8306                     (rdev->wiphy.wowlan_config->rfkill_release &&
8307                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
8308                         goto nla_put_failure;
8309
8310                 if (nl80211_send_wowlan_patterns(msg, rdev))
8311                         goto nla_put_failure;
8312
8313                 if (nl80211_send_wowlan_tcp(msg,
8314                                             rdev->wiphy.wowlan_config->tcp))
8315                         goto nla_put_failure;
8316
8317                 nla_nest_end(msg, nl_wowlan);
8318         }
8319
8320         genlmsg_end(msg, hdr);
8321         return genlmsg_reply(msg, info);
8322
8323 nla_put_failure:
8324         nlmsg_free(msg);
8325         return -ENOBUFS;
8326 }
8327
8328 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8329                                     struct nlattr *attr,
8330                                     struct cfg80211_wowlan *trig)
8331 {
8332         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8333         struct cfg80211_wowlan_tcp *cfg;
8334         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8335         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8336         u32 size;
8337         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8338         int err, port;
8339
8340         if (!rdev->wiphy.wowlan->tcp)
8341                 return -EINVAL;
8342
8343         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8344                         nla_data(attr), nla_len(attr),
8345                         nl80211_wowlan_tcp_policy);
8346         if (err)
8347                 return err;
8348
8349         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8350             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8351             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8352             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8353             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8354             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8355             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8356             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8357                 return -EINVAL;
8358
8359         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8360         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8361                 return -EINVAL;
8362
8363         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8364                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8365             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8366                 return -EINVAL;
8367
8368         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8369         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8370                 return -EINVAL;
8371
8372         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8373         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8374                 return -EINVAL;
8375
8376         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8377                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8378
8379                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8380                 tokens_size = tokln - sizeof(*tok);
8381
8382                 if (!tok->len || tokens_size % tok->len)
8383                         return -EINVAL;
8384                 if (!rdev->wiphy.wowlan->tcp->tok)
8385                         return -EINVAL;
8386                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8387                         return -EINVAL;
8388                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8389                         return -EINVAL;
8390                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8391                         return -EINVAL;
8392                 if (tok->offset + tok->len > data_size)
8393                         return -EINVAL;
8394         }
8395
8396         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8397                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8398                 if (!rdev->wiphy.wowlan->tcp->seq)
8399                         return -EINVAL;
8400                 if (seq->len == 0 || seq->len > 4)
8401                         return -EINVAL;
8402                 if (seq->len + seq->offset > data_size)
8403                         return -EINVAL;
8404         }
8405
8406         size = sizeof(*cfg);
8407         size += data_size;
8408         size += wake_size + wake_mask_size;
8409         size += tokens_size;
8410
8411         cfg = kzalloc(size, GFP_KERNEL);
8412         if (!cfg)
8413                 return -ENOMEM;
8414         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8415         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8416         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8417                ETH_ALEN);
8418         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8419                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8420         else
8421                 port = 0;
8422 #ifdef CONFIG_INET
8423         /* allocate a socket and port for it and use it */
8424         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8425                             IPPROTO_TCP, &cfg->sock, 1);
8426         if (err) {
8427                 kfree(cfg);
8428                 return err;
8429         }
8430         if (inet_csk_get_port(cfg->sock->sk, port)) {
8431                 sock_release(cfg->sock);
8432                 kfree(cfg);
8433                 return -EADDRINUSE;
8434         }
8435         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8436 #else
8437         if (!port) {
8438                 kfree(cfg);
8439                 return -EINVAL;
8440         }
8441         cfg->src_port = port;
8442 #endif
8443
8444         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8445         cfg->payload_len = data_size;
8446         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8447         memcpy((void *)cfg->payload,
8448                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8449                data_size);
8450         if (seq)
8451                 cfg->payload_seq = *seq;
8452         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8453         cfg->wake_len = wake_size;
8454         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8455         memcpy((void *)cfg->wake_data,
8456                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8457                wake_size);
8458         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8459                          data_size + wake_size;
8460         memcpy((void *)cfg->wake_mask,
8461                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8462                wake_mask_size);
8463         if (tok) {
8464                 cfg->tokens_size = tokens_size;
8465                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8466         }
8467
8468         trig->tcp = cfg;
8469
8470         return 0;
8471 }
8472
8473 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8474 {
8475         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8476         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8477         struct cfg80211_wowlan new_triggers = {};
8478         struct cfg80211_wowlan *ntrig;
8479         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8480         int err, i;
8481         bool prev_enabled = rdev->wiphy.wowlan_config;
8482
8483         if (!wowlan)
8484                 return -EOPNOTSUPP;
8485
8486         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8487                 cfg80211_rdev_free_wowlan(rdev);
8488                 rdev->wiphy.wowlan_config = NULL;
8489                 goto set_wakeup;
8490         }
8491
8492         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8493                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8494                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8495                         nl80211_wowlan_policy);
8496         if (err)
8497                 return err;
8498
8499         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8500                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8501                         return -EINVAL;
8502                 new_triggers.any = true;
8503         }
8504
8505         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8506                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8507                         return -EINVAL;
8508                 new_triggers.disconnect = true;
8509         }
8510
8511         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8512                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8513                         return -EINVAL;
8514                 new_triggers.magic_pkt = true;
8515         }
8516
8517         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8518                 return -EINVAL;
8519
8520         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8521                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8522                         return -EINVAL;
8523                 new_triggers.gtk_rekey_failure = true;
8524         }
8525
8526         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8527                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8528                         return -EINVAL;
8529                 new_triggers.eap_identity_req = true;
8530         }
8531
8532         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8533                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8534                         return -EINVAL;
8535                 new_triggers.four_way_handshake = true;
8536         }
8537
8538         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8539                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8540                         return -EINVAL;
8541                 new_triggers.rfkill_release = true;
8542         }
8543
8544         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8545                 struct nlattr *pat;
8546                 int n_patterns = 0;
8547                 int rem, pat_len, mask_len, pkt_offset;
8548                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8549
8550                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8551                                     rem)
8552                         n_patterns++;
8553                 if (n_patterns > wowlan->n_patterns)
8554                         return -EINVAL;
8555
8556                 new_triggers.patterns = kcalloc(n_patterns,
8557                                                 sizeof(new_triggers.patterns[0]),
8558                                                 GFP_KERNEL);
8559                 if (!new_triggers.patterns)
8560                         return -ENOMEM;
8561
8562                 new_triggers.n_patterns = n_patterns;
8563                 i = 0;
8564
8565                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8566                                     rem) {
8567                         u8 *mask_pat;
8568
8569                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8570                                   nla_len(pat), NULL);
8571                         err = -EINVAL;
8572                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8573                             !pat_tb[NL80211_PKTPAT_PATTERN])
8574                                 goto error;
8575                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8576                         mask_len = DIV_ROUND_UP(pat_len, 8);
8577                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8578                                 goto error;
8579                         if (pat_len > wowlan->pattern_max_len ||
8580                             pat_len < wowlan->pattern_min_len)
8581                                 goto error;
8582
8583                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8584                                 pkt_offset = 0;
8585                         else
8586                                 pkt_offset = nla_get_u32(
8587                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8588                         if (pkt_offset > wowlan->max_pkt_offset)
8589                                 goto error;
8590                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8591
8592                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
8593                         if (!mask_pat) {
8594                                 err = -ENOMEM;
8595                                 goto error;
8596                         }
8597                         new_triggers.patterns[i].mask = mask_pat;
8598                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8599                                mask_len);
8600                         mask_pat += mask_len;
8601                         new_triggers.patterns[i].pattern = mask_pat;
8602                         new_triggers.patterns[i].pattern_len = pat_len;
8603                         memcpy(mask_pat,
8604                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8605                                pat_len);
8606                         i++;
8607                 }
8608         }
8609
8610         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8611                 err = nl80211_parse_wowlan_tcp(
8612                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8613                         &new_triggers);
8614                 if (err)
8615                         goto error;
8616         }
8617
8618         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8619         if (!ntrig) {
8620                 err = -ENOMEM;
8621                 goto error;
8622         }
8623         cfg80211_rdev_free_wowlan(rdev);
8624         rdev->wiphy.wowlan_config = ntrig;
8625
8626  set_wakeup:
8627         if (rdev->ops->set_wakeup &&
8628             prev_enabled != !!rdev->wiphy.wowlan_config)
8629                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8630
8631         return 0;
8632  error:
8633         for (i = 0; i < new_triggers.n_patterns; i++)
8634                 kfree(new_triggers.patterns[i].mask);
8635         kfree(new_triggers.patterns);
8636         if (new_triggers.tcp && new_triggers.tcp->sock)
8637                 sock_release(new_triggers.tcp->sock);
8638         kfree(new_triggers.tcp);
8639         return err;
8640 }
8641 #endif
8642
8643 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8644                                        struct cfg80211_registered_device *rdev)
8645 {
8646         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8647         int i, j, pat_len;
8648         struct cfg80211_coalesce_rules *rule;
8649
8650         if (!rdev->coalesce->n_rules)
8651                 return 0;
8652
8653         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8654         if (!nl_rules)
8655                 return -ENOBUFS;
8656
8657         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8658                 nl_rule = nla_nest_start(msg, i + 1);
8659                 if (!nl_rule)
8660                         return -ENOBUFS;
8661
8662                 rule = &rdev->coalesce->rules[i];
8663                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8664                                 rule->delay))
8665                         return -ENOBUFS;
8666
8667                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8668                                 rule->condition))
8669                         return -ENOBUFS;
8670
8671                 nl_pats = nla_nest_start(msg,
8672                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8673                 if (!nl_pats)
8674                         return -ENOBUFS;
8675
8676                 for (j = 0; j < rule->n_patterns; j++) {
8677                         nl_pat = nla_nest_start(msg, j + 1);
8678                         if (!nl_pat)
8679                                 return -ENOBUFS;
8680                         pat_len = rule->patterns[j].pattern_len;
8681                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8682                                     DIV_ROUND_UP(pat_len, 8),
8683                                     rule->patterns[j].mask) ||
8684                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8685                                     rule->patterns[j].pattern) ||
8686                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8687                                         rule->patterns[j].pkt_offset))
8688                                 return -ENOBUFS;
8689                         nla_nest_end(msg, nl_pat);
8690                 }
8691                 nla_nest_end(msg, nl_pats);
8692                 nla_nest_end(msg, nl_rule);
8693         }
8694         nla_nest_end(msg, nl_rules);
8695
8696         return 0;
8697 }
8698
8699 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8700 {
8701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8702         struct sk_buff *msg;
8703         void *hdr;
8704
8705         if (!rdev->wiphy.coalesce)
8706                 return -EOPNOTSUPP;
8707
8708         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8709         if (!msg)
8710                 return -ENOMEM;
8711
8712         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8713                              NL80211_CMD_GET_COALESCE);
8714         if (!hdr)
8715                 goto nla_put_failure;
8716
8717         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8718                 goto nla_put_failure;
8719
8720         genlmsg_end(msg, hdr);
8721         return genlmsg_reply(msg, info);
8722
8723 nla_put_failure:
8724         nlmsg_free(msg);
8725         return -ENOBUFS;
8726 }
8727
8728 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8729 {
8730         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8731         int i, j;
8732         struct cfg80211_coalesce_rules *rule;
8733
8734         if (!coalesce)
8735                 return;
8736
8737         for (i = 0; i < coalesce->n_rules; i++) {
8738                 rule = &coalesce->rules[i];
8739                 for (j = 0; j < rule->n_patterns; j++)
8740                         kfree(rule->patterns[j].mask);
8741                 kfree(rule->patterns);
8742         }
8743         kfree(coalesce->rules);
8744         kfree(coalesce);
8745         rdev->coalesce = NULL;
8746 }
8747
8748 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8749                                        struct nlattr *rule,
8750                                        struct cfg80211_coalesce_rules *new_rule)
8751 {
8752         int err, i;
8753         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8754         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8755         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8756         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8757
8758         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8759                         nla_len(rule), nl80211_coalesce_policy);
8760         if (err)
8761                 return err;
8762
8763         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8764                 new_rule->delay =
8765                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8766         if (new_rule->delay > coalesce->max_delay)
8767                 return -EINVAL;
8768
8769         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8770                 new_rule->condition =
8771                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8772         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8773             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8774                 return -EINVAL;
8775
8776         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8777                 return -EINVAL;
8778
8779         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8780                             rem)
8781                 n_patterns++;
8782         if (n_patterns > coalesce->n_patterns)
8783                 return -EINVAL;
8784
8785         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8786                                      GFP_KERNEL);
8787         if (!new_rule->patterns)
8788                 return -ENOMEM;
8789
8790         new_rule->n_patterns = n_patterns;
8791         i = 0;
8792
8793         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8794                             rem) {
8795                 u8 *mask_pat;
8796
8797                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8798                           nla_len(pat), NULL);
8799                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8800                     !pat_tb[NL80211_PKTPAT_PATTERN])
8801                         return -EINVAL;
8802                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8803                 mask_len = DIV_ROUND_UP(pat_len, 8);
8804                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8805                         return -EINVAL;
8806                 if (pat_len > coalesce->pattern_max_len ||
8807                     pat_len < coalesce->pattern_min_len)
8808                         return -EINVAL;
8809
8810                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8811                         pkt_offset = 0;
8812                 else
8813                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8814                 if (pkt_offset > coalesce->max_pkt_offset)
8815                         return -EINVAL;
8816                 new_rule->patterns[i].pkt_offset = pkt_offset;
8817
8818                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
8819                 if (!mask_pat)
8820                         return -ENOMEM;
8821
8822                 new_rule->patterns[i].mask = mask_pat;
8823                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8824                        mask_len);
8825
8826                 mask_pat += mask_len;
8827                 new_rule->patterns[i].pattern = mask_pat;
8828                 new_rule->patterns[i].pattern_len = pat_len;
8829                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8830                        pat_len);
8831                 i++;
8832         }
8833
8834         return 0;
8835 }
8836
8837 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8838 {
8839         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8840         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8841         struct cfg80211_coalesce new_coalesce = {};
8842         struct cfg80211_coalesce *n_coalesce;
8843         int err, rem_rule, n_rules = 0, i, j;
8844         struct nlattr *rule;
8845         struct cfg80211_coalesce_rules *tmp_rule;
8846
8847         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8848                 return -EOPNOTSUPP;
8849
8850         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8851                 cfg80211_rdev_free_coalesce(rdev);
8852                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8853                 return 0;
8854         }
8855
8856         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8857                             rem_rule)
8858                 n_rules++;
8859         if (n_rules > coalesce->n_rules)
8860                 return -EINVAL;
8861
8862         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8863                                      GFP_KERNEL);
8864         if (!new_coalesce.rules)
8865                 return -ENOMEM;
8866
8867         new_coalesce.n_rules = n_rules;
8868         i = 0;
8869
8870         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8871                             rem_rule) {
8872                 err = nl80211_parse_coalesce_rule(rdev, rule,
8873                                                   &new_coalesce.rules[i]);
8874                 if (err)
8875                         goto error;
8876
8877                 i++;
8878         }
8879
8880         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8881         if (err)
8882                 goto error;
8883
8884         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8885         if (!n_coalesce) {
8886                 err = -ENOMEM;
8887                 goto error;
8888         }
8889         cfg80211_rdev_free_coalesce(rdev);
8890         rdev->coalesce = n_coalesce;
8891
8892         return 0;
8893 error:
8894         for (i = 0; i < new_coalesce.n_rules; i++) {
8895                 tmp_rule = &new_coalesce.rules[i];
8896                 for (j = 0; j < tmp_rule->n_patterns; j++)
8897                         kfree(tmp_rule->patterns[j].mask);
8898                 kfree(tmp_rule->patterns);
8899         }
8900         kfree(new_coalesce.rules);
8901
8902         return err;
8903 }
8904
8905 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8906 {
8907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8908         struct net_device *dev = info->user_ptr[1];
8909         struct wireless_dev *wdev = dev->ieee80211_ptr;
8910         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8911         struct cfg80211_gtk_rekey_data rekey_data;
8912         int err;
8913
8914         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8915                 return -EINVAL;
8916
8917         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8918                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8919                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8920                         nl80211_rekey_policy);
8921         if (err)
8922                 return err;
8923
8924         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8925                 return -ERANGE;
8926         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8927                 return -ERANGE;
8928         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8929                 return -ERANGE;
8930
8931         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8932                NL80211_KEK_LEN);
8933         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8934                NL80211_KCK_LEN);
8935         memcpy(rekey_data.replay_ctr,
8936                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8937                NL80211_REPLAY_CTR_LEN);
8938
8939         wdev_lock(wdev);
8940         if (!wdev->current_bss) {
8941                 err = -ENOTCONN;
8942                 goto out;
8943         }
8944
8945         if (!rdev->ops->set_rekey_data) {
8946                 err = -EOPNOTSUPP;
8947                 goto out;
8948         }
8949
8950         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8951  out:
8952         wdev_unlock(wdev);
8953         return err;
8954 }
8955
8956 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8957                                              struct genl_info *info)
8958 {
8959         struct net_device *dev = info->user_ptr[1];
8960         struct wireless_dev *wdev = dev->ieee80211_ptr;
8961
8962         if (wdev->iftype != NL80211_IFTYPE_AP &&
8963             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8964                 return -EINVAL;
8965
8966         if (wdev->ap_unexpected_nlportid)
8967                 return -EBUSY;
8968
8969         wdev->ap_unexpected_nlportid = info->snd_portid;
8970         return 0;
8971 }
8972
8973 static int nl80211_probe_client(struct sk_buff *skb,
8974                                 struct genl_info *info)
8975 {
8976         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8977         struct net_device *dev = info->user_ptr[1];
8978         struct wireless_dev *wdev = dev->ieee80211_ptr;
8979         struct sk_buff *msg;
8980         void *hdr;
8981         const u8 *addr;
8982         u64 cookie;
8983         int err;
8984
8985         if (wdev->iftype != NL80211_IFTYPE_AP &&
8986             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8987                 return -EOPNOTSUPP;
8988
8989         if (!info->attrs[NL80211_ATTR_MAC])
8990                 return -EINVAL;
8991
8992         if (!rdev->ops->probe_client)
8993                 return -EOPNOTSUPP;
8994
8995         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8996         if (!msg)
8997                 return -ENOMEM;
8998
8999         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9000                              NL80211_CMD_PROBE_CLIENT);
9001         if (!hdr) {
9002                 err = -ENOBUFS;
9003                 goto free_msg;
9004         }
9005
9006         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9007
9008         err = rdev_probe_client(rdev, dev, addr, &cookie);
9009         if (err)
9010                 goto free_msg;
9011
9012         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9013                 goto nla_put_failure;
9014
9015         genlmsg_end(msg, hdr);
9016
9017         return genlmsg_reply(msg, info);
9018
9019  nla_put_failure:
9020         err = -ENOBUFS;
9021  free_msg:
9022         nlmsg_free(msg);
9023         return err;
9024 }
9025
9026 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9027 {
9028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9029         struct cfg80211_beacon_registration *reg, *nreg;
9030         int rv;
9031
9032         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9033                 return -EOPNOTSUPP;
9034
9035         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9036         if (!nreg)
9037                 return -ENOMEM;
9038
9039         /* First, check if already registered. */
9040         spin_lock_bh(&rdev->beacon_registrations_lock);
9041         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9042                 if (reg->nlportid == info->snd_portid) {
9043                         rv = -EALREADY;
9044                         goto out_err;
9045                 }
9046         }
9047         /* Add it to the list */
9048         nreg->nlportid = info->snd_portid;
9049         list_add(&nreg->list, &rdev->beacon_registrations);
9050
9051         spin_unlock_bh(&rdev->beacon_registrations_lock);
9052
9053         return 0;
9054 out_err:
9055         spin_unlock_bh(&rdev->beacon_registrations_lock);
9056         kfree(nreg);
9057         return rv;
9058 }
9059
9060 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9061 {
9062         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9063         struct wireless_dev *wdev = info->user_ptr[1];
9064         int err;
9065
9066         if (!rdev->ops->start_p2p_device)
9067                 return -EOPNOTSUPP;
9068
9069         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9070                 return -EOPNOTSUPP;
9071
9072         if (wdev->p2p_started)
9073                 return 0;
9074
9075         if (rfkill_blocked(rdev->rfkill))
9076                 return -ERFKILL;
9077
9078         err = rdev_start_p2p_device(rdev, wdev);
9079         if (err)
9080                 return err;
9081
9082         wdev->p2p_started = true;
9083         rdev->opencount++;
9084
9085         return 0;
9086 }
9087
9088 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9089 {
9090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9091         struct wireless_dev *wdev = info->user_ptr[1];
9092
9093         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9094                 return -EOPNOTSUPP;
9095
9096         if (!rdev->ops->stop_p2p_device)
9097                 return -EOPNOTSUPP;
9098
9099         cfg80211_stop_p2p_device(rdev, wdev);
9100
9101         return 0;
9102 }
9103
9104 static int nl80211_get_protocol_features(struct sk_buff *skb,
9105                                          struct genl_info *info)
9106 {
9107         void *hdr;
9108         struct sk_buff *msg;
9109
9110         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9111         if (!msg)
9112                 return -ENOMEM;
9113
9114         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9115                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9116         if (!hdr)
9117                 goto nla_put_failure;
9118
9119         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9120                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9121                 goto nla_put_failure;
9122
9123         genlmsg_end(msg, hdr);
9124         return genlmsg_reply(msg, info);
9125
9126  nla_put_failure:
9127         kfree_skb(msg);
9128         return -ENOBUFS;
9129 }
9130
9131 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9132 {
9133         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9134         struct cfg80211_update_ft_ies_params ft_params;
9135         struct net_device *dev = info->user_ptr[1];
9136
9137         if (!rdev->ops->update_ft_ies)
9138                 return -EOPNOTSUPP;
9139
9140         if (!info->attrs[NL80211_ATTR_MDID] ||
9141             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9142                 return -EINVAL;
9143
9144         memset(&ft_params, 0, sizeof(ft_params));
9145         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
9146         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9147         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9148
9149         return rdev_update_ft_ies(rdev, dev, &ft_params);
9150 }
9151
9152 static int nl80211_crit_protocol_start(struct sk_buff *skb,
9153                                        struct genl_info *info)
9154 {
9155         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9156         struct wireless_dev *wdev = info->user_ptr[1];
9157         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
9158         u16 duration;
9159         int ret;
9160
9161         if (!rdev->ops->crit_proto_start)
9162                 return -EOPNOTSUPP;
9163
9164         if (WARN_ON(!rdev->ops->crit_proto_stop))
9165                 return -EINVAL;
9166
9167         if (rdev->crit_proto_nlportid)
9168                 return -EBUSY;
9169
9170         /* determine protocol if provided */
9171         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
9172                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
9173
9174         if (proto >= NUM_NL80211_CRIT_PROTO)
9175                 return -EINVAL;
9176
9177         /* timeout must be provided */
9178         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
9179                 return -EINVAL;
9180
9181         duration =
9182                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
9183
9184         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
9185                 return -ERANGE;
9186
9187         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
9188         if (!ret)
9189                 rdev->crit_proto_nlportid = info->snd_portid;
9190
9191         return ret;
9192 }
9193
9194 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
9195                                       struct genl_info *info)
9196 {
9197         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9198         struct wireless_dev *wdev = info->user_ptr[1];
9199
9200         if (!rdev->ops->crit_proto_stop)
9201                 return -EOPNOTSUPP;
9202
9203         if (rdev->crit_proto_nlportid) {
9204                 rdev->crit_proto_nlportid = 0;
9205                 rdev_crit_proto_stop(rdev, wdev);
9206         }
9207         return 0;
9208 }
9209
9210 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
9211 {
9212         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9213         struct wireless_dev *wdev =
9214                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
9215         int i, err;
9216         u32 vid, subcmd;
9217
9218         if (!rdev->wiphy.vendor_commands)
9219                 return -EOPNOTSUPP;
9220
9221         if (IS_ERR(wdev)) {
9222                 err = PTR_ERR(wdev);
9223                 if (err != -EINVAL)
9224                         return err;
9225                 wdev = NULL;
9226         } else if (wdev->wiphy != &rdev->wiphy) {
9227                 return -EINVAL;
9228         }
9229
9230         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
9231             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
9232                 return -EINVAL;
9233
9234         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
9235         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
9236         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
9237                 const struct wiphy_vendor_command *vcmd;
9238                 void *data = NULL;
9239                 int len = 0;
9240
9241                 vcmd = &rdev->wiphy.vendor_commands[i];
9242
9243                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
9244                         continue;
9245
9246                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
9247                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
9248                         if (!wdev)
9249                                 return -EINVAL;
9250                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
9251                             !wdev->netdev)
9252                                 return -EINVAL;
9253
9254                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
9255                                 if (wdev->netdev &&
9256                                     !netif_running(wdev->netdev))
9257                                         return -ENETDOWN;
9258                                 if (!wdev->netdev && !wdev->p2p_started)
9259                                         return -ENETDOWN;
9260                         }
9261                 } else {
9262                         wdev = NULL;
9263                 }
9264
9265                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
9266                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9267                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9268                 }
9269
9270                 rdev->cur_cmd_info = info;
9271                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
9272                                                           data, len);
9273                 rdev->cur_cmd_info = NULL;
9274                 return err;
9275         }
9276
9277         return -EOPNOTSUPP;
9278 }
9279
9280 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
9281                                            enum nl80211_commands cmd,
9282                                            enum nl80211_attrs attr,
9283                                            int approxlen)
9284 {
9285         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
9286
9287         if (WARN_ON(!rdev->cur_cmd_info))
9288                 return NULL;
9289
9290         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
9291                                            rdev->cur_cmd_info->snd_portid,
9292                                            rdev->cur_cmd_info->snd_seq,
9293                                            cmd, attr, NULL, GFP_KERNEL);
9294 }
9295 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
9296
9297 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
9298 {
9299         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
9300         void *hdr = ((void **)skb->cb)[1];
9301         struct nlattr *data = ((void **)skb->cb)[2];
9302
9303         if (WARN_ON(!rdev->cur_cmd_info)) {
9304                 kfree_skb(skb);
9305                 return -EINVAL;
9306         }
9307
9308         nla_nest_end(skb, data);
9309         genlmsg_end(skb, hdr);
9310         return genlmsg_reply(skb, rdev->cur_cmd_info);
9311 }
9312 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
9313
9314
9315 static int nl80211_set_qos_map(struct sk_buff *skb,
9316                                struct genl_info *info)
9317 {
9318         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9319         struct cfg80211_qos_map *qos_map = NULL;
9320         struct net_device *dev = info->user_ptr[1];
9321         u8 *pos, len, num_des, des_len, des;
9322         int ret;
9323
9324         if (!rdev->ops->set_qos_map)
9325                 return -EOPNOTSUPP;
9326
9327         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
9328                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
9329                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
9330
9331                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
9332                     len > IEEE80211_QOS_MAP_LEN_MAX)
9333                         return -EINVAL;
9334
9335                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
9336                 if (!qos_map)
9337                         return -ENOMEM;
9338
9339                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
9340                 if (num_des) {
9341                         des_len = num_des *
9342                                 sizeof(struct cfg80211_dscp_exception);
9343                         memcpy(qos_map->dscp_exception, pos, des_len);
9344                         qos_map->num_des = num_des;
9345                         for (des = 0; des < num_des; des++) {
9346                                 if (qos_map->dscp_exception[des].up > 7) {
9347                                         kfree(qos_map);
9348                                         return -EINVAL;
9349                                 }
9350                         }
9351                         pos += des_len;
9352                 }
9353                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
9354         }
9355
9356         wdev_lock(dev->ieee80211_ptr);
9357         ret = nl80211_key_allowed(dev->ieee80211_ptr);
9358         if (!ret)
9359                 ret = rdev_set_qos_map(rdev, dev, qos_map);
9360         wdev_unlock(dev->ieee80211_ptr);
9361
9362         kfree(qos_map);
9363         return ret;
9364 }
9365
9366 #define NL80211_FLAG_NEED_WIPHY         0x01
9367 #define NL80211_FLAG_NEED_NETDEV        0x02
9368 #define NL80211_FLAG_NEED_RTNL          0x04
9369 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
9370 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
9371                                          NL80211_FLAG_CHECK_NETDEV_UP)
9372 #define NL80211_FLAG_NEED_WDEV          0x10
9373 /* If a netdev is associated, it must be UP, P2P must be started */
9374 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
9375                                          NL80211_FLAG_CHECK_NETDEV_UP)
9376
9377 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
9378                             struct genl_info *info)
9379 {
9380         struct cfg80211_registered_device *rdev;
9381         struct wireless_dev *wdev;
9382         struct net_device *dev;
9383         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
9384
9385         if (rtnl)
9386                 rtnl_lock();
9387
9388         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
9389                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
9390                 if (IS_ERR(rdev)) {
9391                         if (rtnl)
9392                                 rtnl_unlock();
9393                         return PTR_ERR(rdev);
9394                 }
9395                 info->user_ptr[0] = rdev;
9396         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
9397                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9398                 ASSERT_RTNL();
9399
9400                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
9401                                                   info->attrs);
9402                 if (IS_ERR(wdev)) {
9403                         if (rtnl)
9404                                 rtnl_unlock();
9405                         return PTR_ERR(wdev);
9406                 }
9407
9408                 dev = wdev->netdev;
9409                 rdev = wiphy_to_rdev(wdev->wiphy);
9410
9411                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
9412                         if (!dev) {
9413                                 if (rtnl)
9414                                         rtnl_unlock();
9415                                 return -EINVAL;
9416                         }
9417
9418                         info->user_ptr[1] = dev;
9419                 } else {
9420                         info->user_ptr[1] = wdev;
9421                 }
9422
9423                 if (dev) {
9424                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
9425                             !netif_running(dev)) {
9426                                 if (rtnl)
9427                                         rtnl_unlock();
9428                                 return -ENETDOWN;
9429                         }
9430
9431                         dev_hold(dev);
9432                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
9433                         if (!wdev->p2p_started) {
9434                                 if (rtnl)
9435                                         rtnl_unlock();
9436                                 return -ENETDOWN;
9437                         }
9438                 }
9439
9440                 info->user_ptr[0] = rdev;
9441         }
9442
9443         return 0;
9444 }
9445
9446 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
9447                               struct genl_info *info)
9448 {
9449         if (info->user_ptr[1]) {
9450                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9451                         struct wireless_dev *wdev = info->user_ptr[1];
9452
9453                         if (wdev->netdev)
9454                                 dev_put(wdev->netdev);
9455                 } else {
9456                         dev_put(info->user_ptr[1]);
9457                 }
9458         }
9459         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
9460                 rtnl_unlock();
9461 }
9462
9463 static const struct genl_ops nl80211_ops[] = {
9464         {
9465                 .cmd = NL80211_CMD_GET_WIPHY,
9466                 .doit = nl80211_get_wiphy,
9467                 .dumpit = nl80211_dump_wiphy,
9468                 .done = nl80211_dump_wiphy_done,
9469                 .policy = nl80211_policy,
9470                 /* can be retrieved by unprivileged users */
9471                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9472                                   NL80211_FLAG_NEED_RTNL,
9473         },
9474         {
9475                 .cmd = NL80211_CMD_SET_WIPHY,
9476                 .doit = nl80211_set_wiphy,
9477                 .policy = nl80211_policy,
9478                 .flags = GENL_ADMIN_PERM,
9479                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9480         },
9481         {
9482                 .cmd = NL80211_CMD_GET_INTERFACE,
9483                 .doit = nl80211_get_interface,
9484                 .dumpit = nl80211_dump_interface,
9485                 .policy = nl80211_policy,
9486                 /* can be retrieved by unprivileged users */
9487                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9488                                   NL80211_FLAG_NEED_RTNL,
9489         },
9490         {
9491                 .cmd = NL80211_CMD_SET_INTERFACE,
9492                 .doit = nl80211_set_interface,
9493                 .policy = nl80211_policy,
9494                 .flags = GENL_ADMIN_PERM,
9495                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9496                                   NL80211_FLAG_NEED_RTNL,
9497         },
9498         {
9499                 .cmd = NL80211_CMD_NEW_INTERFACE,
9500                 .doit = nl80211_new_interface,
9501                 .policy = nl80211_policy,
9502                 .flags = GENL_ADMIN_PERM,
9503                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9504                                   NL80211_FLAG_NEED_RTNL,
9505         },
9506         {
9507                 .cmd = NL80211_CMD_DEL_INTERFACE,
9508                 .doit = nl80211_del_interface,
9509                 .policy = nl80211_policy,
9510                 .flags = GENL_ADMIN_PERM,
9511                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9512                                   NL80211_FLAG_NEED_RTNL,
9513         },
9514         {
9515                 .cmd = NL80211_CMD_GET_KEY,
9516                 .doit = nl80211_get_key,
9517                 .policy = nl80211_policy,
9518                 .flags = GENL_ADMIN_PERM,
9519                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9520                                   NL80211_FLAG_NEED_RTNL,
9521         },
9522         {
9523                 .cmd = NL80211_CMD_SET_KEY,
9524                 .doit = nl80211_set_key,
9525                 .policy = nl80211_policy,
9526                 .flags = GENL_ADMIN_PERM,
9527                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9528                                   NL80211_FLAG_NEED_RTNL,
9529         },
9530         {
9531                 .cmd = NL80211_CMD_NEW_KEY,
9532                 .doit = nl80211_new_key,
9533                 .policy = nl80211_policy,
9534                 .flags = GENL_ADMIN_PERM,
9535                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9536                                   NL80211_FLAG_NEED_RTNL,
9537         },
9538         {
9539                 .cmd = NL80211_CMD_DEL_KEY,
9540                 .doit = nl80211_del_key,
9541                 .policy = nl80211_policy,
9542                 .flags = GENL_ADMIN_PERM,
9543                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9544                                   NL80211_FLAG_NEED_RTNL,
9545         },
9546         {
9547                 .cmd = NL80211_CMD_SET_BEACON,
9548                 .policy = nl80211_policy,
9549                 .flags = GENL_ADMIN_PERM,
9550                 .doit = nl80211_set_beacon,
9551                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9552                                   NL80211_FLAG_NEED_RTNL,
9553         },
9554         {
9555                 .cmd = NL80211_CMD_START_AP,
9556                 .policy = nl80211_policy,
9557                 .flags = GENL_ADMIN_PERM,
9558                 .doit = nl80211_start_ap,
9559                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9560                                   NL80211_FLAG_NEED_RTNL,
9561         },
9562         {
9563                 .cmd = NL80211_CMD_STOP_AP,
9564                 .policy = nl80211_policy,
9565                 .flags = GENL_ADMIN_PERM,
9566                 .doit = nl80211_stop_ap,
9567                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9568                                   NL80211_FLAG_NEED_RTNL,
9569         },
9570         {
9571                 .cmd = NL80211_CMD_GET_STATION,
9572                 .doit = nl80211_get_station,
9573                 .dumpit = nl80211_dump_station,
9574                 .policy = nl80211_policy,
9575                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9576                                   NL80211_FLAG_NEED_RTNL,
9577         },
9578         {
9579                 .cmd = NL80211_CMD_SET_STATION,
9580                 .doit = nl80211_set_station,
9581                 .policy = nl80211_policy,
9582                 .flags = GENL_ADMIN_PERM,
9583                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9584                                   NL80211_FLAG_NEED_RTNL,
9585         },
9586         {
9587                 .cmd = NL80211_CMD_NEW_STATION,
9588                 .doit = nl80211_new_station,
9589                 .policy = nl80211_policy,
9590                 .flags = GENL_ADMIN_PERM,
9591                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9592                                   NL80211_FLAG_NEED_RTNL,
9593         },
9594         {
9595                 .cmd = NL80211_CMD_DEL_STATION,
9596                 .doit = nl80211_del_station,
9597                 .policy = nl80211_policy,
9598                 .flags = GENL_ADMIN_PERM,
9599                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9600                                   NL80211_FLAG_NEED_RTNL,
9601         },
9602         {
9603                 .cmd = NL80211_CMD_GET_MPATH,
9604                 .doit = nl80211_get_mpath,
9605                 .dumpit = nl80211_dump_mpath,
9606                 .policy = nl80211_policy,
9607                 .flags = GENL_ADMIN_PERM,
9608                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9609                                   NL80211_FLAG_NEED_RTNL,
9610         },
9611         {
9612                 .cmd = NL80211_CMD_SET_MPATH,
9613                 .doit = nl80211_set_mpath,
9614                 .policy = nl80211_policy,
9615                 .flags = GENL_ADMIN_PERM,
9616                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9617                                   NL80211_FLAG_NEED_RTNL,
9618         },
9619         {
9620                 .cmd = NL80211_CMD_NEW_MPATH,
9621                 .doit = nl80211_new_mpath,
9622                 .policy = nl80211_policy,
9623                 .flags = GENL_ADMIN_PERM,
9624                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9625                                   NL80211_FLAG_NEED_RTNL,
9626         },
9627         {
9628                 .cmd = NL80211_CMD_DEL_MPATH,
9629                 .doit = nl80211_del_mpath,
9630                 .policy = nl80211_policy,
9631                 .flags = GENL_ADMIN_PERM,
9632                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9633                                   NL80211_FLAG_NEED_RTNL,
9634         },
9635         {
9636                 .cmd = NL80211_CMD_SET_BSS,
9637                 .doit = nl80211_set_bss,
9638                 .policy = nl80211_policy,
9639                 .flags = GENL_ADMIN_PERM,
9640                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9641                                   NL80211_FLAG_NEED_RTNL,
9642         },
9643         {
9644                 .cmd = NL80211_CMD_GET_REG,
9645                 .doit = nl80211_get_reg,
9646                 .policy = nl80211_policy,
9647                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9648                 /* can be retrieved by unprivileged users */
9649         },
9650         {
9651                 .cmd = NL80211_CMD_SET_REG,
9652                 .doit = nl80211_set_reg,
9653                 .policy = nl80211_policy,
9654                 .flags = GENL_ADMIN_PERM,
9655                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9656         },
9657         {
9658                 .cmd = NL80211_CMD_REQ_SET_REG,
9659                 .doit = nl80211_req_set_reg,
9660                 .policy = nl80211_policy,
9661                 .flags = GENL_ADMIN_PERM,
9662         },
9663         {
9664                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9665                 .doit = nl80211_get_mesh_config,
9666                 .policy = nl80211_policy,
9667                 /* can be retrieved by unprivileged users */
9668                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9669                                   NL80211_FLAG_NEED_RTNL,
9670         },
9671         {
9672                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9673                 .doit = nl80211_update_mesh_config,
9674                 .policy = nl80211_policy,
9675                 .flags = GENL_ADMIN_PERM,
9676                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9677                                   NL80211_FLAG_NEED_RTNL,
9678         },
9679         {
9680                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9681                 .doit = nl80211_trigger_scan,
9682                 .policy = nl80211_policy,
9683                 .flags = GENL_ADMIN_PERM,
9684                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9685                                   NL80211_FLAG_NEED_RTNL,
9686         },
9687         {
9688                 .cmd = NL80211_CMD_GET_SCAN,
9689                 .policy = nl80211_policy,
9690                 .dumpit = nl80211_dump_scan,
9691         },
9692         {
9693                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9694                 .doit = nl80211_start_sched_scan,
9695                 .policy = nl80211_policy,
9696                 .flags = GENL_ADMIN_PERM,
9697                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9698                                   NL80211_FLAG_NEED_RTNL,
9699         },
9700         {
9701                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9702                 .doit = nl80211_stop_sched_scan,
9703                 .policy = nl80211_policy,
9704                 .flags = GENL_ADMIN_PERM,
9705                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9706                                   NL80211_FLAG_NEED_RTNL,
9707         },
9708         {
9709                 .cmd = NL80211_CMD_AUTHENTICATE,
9710                 .doit = nl80211_authenticate,
9711                 .policy = nl80211_policy,
9712                 .flags = GENL_ADMIN_PERM,
9713                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9714                                   NL80211_FLAG_NEED_RTNL,
9715         },
9716         {
9717                 .cmd = NL80211_CMD_ASSOCIATE,
9718                 .doit = nl80211_associate,
9719                 .policy = nl80211_policy,
9720                 .flags = GENL_ADMIN_PERM,
9721                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9722                                   NL80211_FLAG_NEED_RTNL,
9723         },
9724         {
9725                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9726                 .doit = nl80211_deauthenticate,
9727                 .policy = nl80211_policy,
9728                 .flags = GENL_ADMIN_PERM,
9729                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9730                                   NL80211_FLAG_NEED_RTNL,
9731         },
9732         {
9733                 .cmd = NL80211_CMD_DISASSOCIATE,
9734                 .doit = nl80211_disassociate,
9735                 .policy = nl80211_policy,
9736                 .flags = GENL_ADMIN_PERM,
9737                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9738                                   NL80211_FLAG_NEED_RTNL,
9739         },
9740         {
9741                 .cmd = NL80211_CMD_JOIN_IBSS,
9742                 .doit = nl80211_join_ibss,
9743                 .policy = nl80211_policy,
9744                 .flags = GENL_ADMIN_PERM,
9745                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9746                                   NL80211_FLAG_NEED_RTNL,
9747         },
9748         {
9749                 .cmd = NL80211_CMD_LEAVE_IBSS,
9750                 .doit = nl80211_leave_ibss,
9751                 .policy = nl80211_policy,
9752                 .flags = GENL_ADMIN_PERM,
9753                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9754                                   NL80211_FLAG_NEED_RTNL,
9755         },
9756 #ifdef CONFIG_NL80211_TESTMODE
9757         {
9758                 .cmd = NL80211_CMD_TESTMODE,
9759                 .doit = nl80211_testmode_do,
9760                 .dumpit = nl80211_testmode_dump,
9761                 .policy = nl80211_policy,
9762                 .flags = GENL_ADMIN_PERM,
9763                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9764                                   NL80211_FLAG_NEED_RTNL,
9765         },
9766 #endif
9767         {
9768                 .cmd = NL80211_CMD_CONNECT,
9769                 .doit = nl80211_connect,
9770                 .policy = nl80211_policy,
9771                 .flags = GENL_ADMIN_PERM,
9772                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9773                                   NL80211_FLAG_NEED_RTNL,
9774         },
9775         {
9776                 .cmd = NL80211_CMD_DISCONNECT,
9777                 .doit = nl80211_disconnect,
9778                 .policy = nl80211_policy,
9779                 .flags = GENL_ADMIN_PERM,
9780                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9781                                   NL80211_FLAG_NEED_RTNL,
9782         },
9783         {
9784                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9785                 .doit = nl80211_wiphy_netns,
9786                 .policy = nl80211_policy,
9787                 .flags = GENL_ADMIN_PERM,
9788                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9789                                   NL80211_FLAG_NEED_RTNL,
9790         },
9791         {
9792                 .cmd = NL80211_CMD_GET_SURVEY,
9793                 .policy = nl80211_policy,
9794                 .dumpit = nl80211_dump_survey,
9795         },
9796         {
9797                 .cmd = NL80211_CMD_SET_PMKSA,
9798                 .doit = nl80211_setdel_pmksa,
9799                 .policy = nl80211_policy,
9800                 .flags = GENL_ADMIN_PERM,
9801                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9802                                   NL80211_FLAG_NEED_RTNL,
9803         },
9804         {
9805                 .cmd = NL80211_CMD_DEL_PMKSA,
9806                 .doit = nl80211_setdel_pmksa,
9807                 .policy = nl80211_policy,
9808                 .flags = GENL_ADMIN_PERM,
9809                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9810                                   NL80211_FLAG_NEED_RTNL,
9811         },
9812         {
9813                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9814                 .doit = nl80211_flush_pmksa,
9815                 .policy = nl80211_policy,
9816                 .flags = GENL_ADMIN_PERM,
9817                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9818                                   NL80211_FLAG_NEED_RTNL,
9819         },
9820         {
9821                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9822                 .doit = nl80211_remain_on_channel,
9823                 .policy = nl80211_policy,
9824                 .flags = GENL_ADMIN_PERM,
9825                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9826                                   NL80211_FLAG_NEED_RTNL,
9827         },
9828         {
9829                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9830                 .doit = nl80211_cancel_remain_on_channel,
9831                 .policy = nl80211_policy,
9832                 .flags = GENL_ADMIN_PERM,
9833                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9834                                   NL80211_FLAG_NEED_RTNL,
9835         },
9836         {
9837                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9838                 .doit = nl80211_set_tx_bitrate_mask,
9839                 .policy = nl80211_policy,
9840                 .flags = GENL_ADMIN_PERM,
9841                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9842                                   NL80211_FLAG_NEED_RTNL,
9843         },
9844         {
9845                 .cmd = NL80211_CMD_REGISTER_FRAME,
9846                 .doit = nl80211_register_mgmt,
9847                 .policy = nl80211_policy,
9848                 .flags = GENL_ADMIN_PERM,
9849                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9850                                   NL80211_FLAG_NEED_RTNL,
9851         },
9852         {
9853                 .cmd = NL80211_CMD_FRAME,
9854                 .doit = nl80211_tx_mgmt,
9855                 .policy = nl80211_policy,
9856                 .flags = GENL_ADMIN_PERM,
9857                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9858                                   NL80211_FLAG_NEED_RTNL,
9859         },
9860         {
9861                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9862                 .doit = nl80211_tx_mgmt_cancel_wait,
9863                 .policy = nl80211_policy,
9864                 .flags = GENL_ADMIN_PERM,
9865                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9866                                   NL80211_FLAG_NEED_RTNL,
9867         },
9868         {
9869                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9870                 .doit = nl80211_set_power_save,
9871                 .policy = nl80211_policy,
9872                 .flags = GENL_ADMIN_PERM,
9873                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9874                                   NL80211_FLAG_NEED_RTNL,
9875         },
9876         {
9877                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9878                 .doit = nl80211_get_power_save,
9879                 .policy = nl80211_policy,
9880                 /* can be retrieved by unprivileged users */
9881                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9882                                   NL80211_FLAG_NEED_RTNL,
9883         },
9884         {
9885                 .cmd = NL80211_CMD_SET_CQM,
9886                 .doit = nl80211_set_cqm,
9887                 .policy = nl80211_policy,
9888                 .flags = GENL_ADMIN_PERM,
9889                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9890                                   NL80211_FLAG_NEED_RTNL,
9891         },
9892         {
9893                 .cmd = NL80211_CMD_SET_CHANNEL,
9894                 .doit = nl80211_set_channel,
9895                 .policy = nl80211_policy,
9896                 .flags = GENL_ADMIN_PERM,
9897                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9898                                   NL80211_FLAG_NEED_RTNL,
9899         },
9900         {
9901                 .cmd = NL80211_CMD_SET_WDS_PEER,
9902                 .doit = nl80211_set_wds_peer,
9903                 .policy = nl80211_policy,
9904                 .flags = GENL_ADMIN_PERM,
9905                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9906                                   NL80211_FLAG_NEED_RTNL,
9907         },
9908         {
9909                 .cmd = NL80211_CMD_JOIN_MESH,
9910                 .doit = nl80211_join_mesh,
9911                 .policy = nl80211_policy,
9912                 .flags = GENL_ADMIN_PERM,
9913                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9914                                   NL80211_FLAG_NEED_RTNL,
9915         },
9916         {
9917                 .cmd = NL80211_CMD_LEAVE_MESH,
9918                 .doit = nl80211_leave_mesh,
9919                 .policy = nl80211_policy,
9920                 .flags = GENL_ADMIN_PERM,
9921                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9922                                   NL80211_FLAG_NEED_RTNL,
9923         },
9924 #ifdef CONFIG_PM
9925         {
9926                 .cmd = NL80211_CMD_GET_WOWLAN,
9927                 .doit = nl80211_get_wowlan,
9928                 .policy = nl80211_policy,
9929                 /* can be retrieved by unprivileged users */
9930                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9931                                   NL80211_FLAG_NEED_RTNL,
9932         },
9933         {
9934                 .cmd = NL80211_CMD_SET_WOWLAN,
9935                 .doit = nl80211_set_wowlan,
9936                 .policy = nl80211_policy,
9937                 .flags = GENL_ADMIN_PERM,
9938                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9939                                   NL80211_FLAG_NEED_RTNL,
9940         },
9941 #endif
9942         {
9943                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9944                 .doit = nl80211_set_rekey_data,
9945                 .policy = nl80211_policy,
9946                 .flags = GENL_ADMIN_PERM,
9947                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9948                                   NL80211_FLAG_NEED_RTNL,
9949         },
9950         {
9951                 .cmd = NL80211_CMD_TDLS_MGMT,
9952                 .doit = nl80211_tdls_mgmt,
9953                 .policy = nl80211_policy,
9954                 .flags = GENL_ADMIN_PERM,
9955                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9956                                   NL80211_FLAG_NEED_RTNL,
9957         },
9958         {
9959                 .cmd = NL80211_CMD_TDLS_OPER,
9960                 .doit = nl80211_tdls_oper,
9961                 .policy = nl80211_policy,
9962                 .flags = GENL_ADMIN_PERM,
9963                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9964                                   NL80211_FLAG_NEED_RTNL,
9965         },
9966         {
9967                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9968                 .doit = nl80211_register_unexpected_frame,
9969                 .policy = nl80211_policy,
9970                 .flags = GENL_ADMIN_PERM,
9971                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9972                                   NL80211_FLAG_NEED_RTNL,
9973         },
9974         {
9975                 .cmd = NL80211_CMD_PROBE_CLIENT,
9976                 .doit = nl80211_probe_client,
9977                 .policy = nl80211_policy,
9978                 .flags = GENL_ADMIN_PERM,
9979                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9980                                   NL80211_FLAG_NEED_RTNL,
9981         },
9982         {
9983                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9984                 .doit = nl80211_register_beacons,
9985                 .policy = nl80211_policy,
9986                 .flags = GENL_ADMIN_PERM,
9987                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9988                                   NL80211_FLAG_NEED_RTNL,
9989         },
9990         {
9991                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9992                 .doit = nl80211_set_noack_map,
9993                 .policy = nl80211_policy,
9994                 .flags = GENL_ADMIN_PERM,
9995                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9996                                   NL80211_FLAG_NEED_RTNL,
9997         },
9998         {
9999                 .cmd = NL80211_CMD_START_P2P_DEVICE,
10000                 .doit = nl80211_start_p2p_device,
10001                 .policy = nl80211_policy,
10002                 .flags = GENL_ADMIN_PERM,
10003                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10004                                   NL80211_FLAG_NEED_RTNL,
10005         },
10006         {
10007                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
10008                 .doit = nl80211_stop_p2p_device,
10009                 .policy = nl80211_policy,
10010                 .flags = GENL_ADMIN_PERM,
10011                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10012                                   NL80211_FLAG_NEED_RTNL,
10013         },
10014         {
10015                 .cmd = NL80211_CMD_SET_MCAST_RATE,
10016                 .doit = nl80211_set_mcast_rate,
10017                 .policy = nl80211_policy,
10018                 .flags = GENL_ADMIN_PERM,
10019                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10020                                   NL80211_FLAG_NEED_RTNL,
10021         },
10022         {
10023                 .cmd = NL80211_CMD_SET_MAC_ACL,
10024                 .doit = nl80211_set_mac_acl,
10025                 .policy = nl80211_policy,
10026                 .flags = GENL_ADMIN_PERM,
10027                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10028                                   NL80211_FLAG_NEED_RTNL,
10029         },
10030         {
10031                 .cmd = NL80211_CMD_RADAR_DETECT,
10032                 .doit = nl80211_start_radar_detection,
10033                 .policy = nl80211_policy,
10034                 .flags = GENL_ADMIN_PERM,
10035                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10036                                   NL80211_FLAG_NEED_RTNL,
10037         },
10038         {
10039                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
10040                 .doit = nl80211_get_protocol_features,
10041                 .policy = nl80211_policy,
10042         },
10043         {
10044                 .cmd = NL80211_CMD_UPDATE_FT_IES,
10045                 .doit = nl80211_update_ft_ies,
10046                 .policy = nl80211_policy,
10047                 .flags = GENL_ADMIN_PERM,
10048                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10049                                   NL80211_FLAG_NEED_RTNL,
10050         },
10051         {
10052                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
10053                 .doit = nl80211_crit_protocol_start,
10054                 .policy = nl80211_policy,
10055                 .flags = GENL_ADMIN_PERM,
10056                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10057                                   NL80211_FLAG_NEED_RTNL,
10058         },
10059         {
10060                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
10061                 .doit = nl80211_crit_protocol_stop,
10062                 .policy = nl80211_policy,
10063                 .flags = GENL_ADMIN_PERM,
10064                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10065                                   NL80211_FLAG_NEED_RTNL,
10066         },
10067         {
10068                 .cmd = NL80211_CMD_GET_COALESCE,
10069                 .doit = nl80211_get_coalesce,
10070                 .policy = nl80211_policy,
10071                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10072                                   NL80211_FLAG_NEED_RTNL,
10073         },
10074         {
10075                 .cmd = NL80211_CMD_SET_COALESCE,
10076                 .doit = nl80211_set_coalesce,
10077                 .policy = nl80211_policy,
10078                 .flags = GENL_ADMIN_PERM,
10079                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10080                                   NL80211_FLAG_NEED_RTNL,
10081         },
10082         {
10083                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
10084                 .doit = nl80211_channel_switch,
10085                 .policy = nl80211_policy,
10086                 .flags = GENL_ADMIN_PERM,
10087                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10088                                   NL80211_FLAG_NEED_RTNL,
10089         },
10090         {
10091                 .cmd = NL80211_CMD_VENDOR,
10092                 .doit = nl80211_vendor_cmd,
10093                 .policy = nl80211_policy,
10094                 .flags = GENL_ADMIN_PERM,
10095                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10096                                   NL80211_FLAG_NEED_RTNL,
10097         },
10098         {
10099                 .cmd = NL80211_CMD_SET_QOS_MAP,
10100                 .doit = nl80211_set_qos_map,
10101                 .policy = nl80211_policy,
10102                 .flags = GENL_ADMIN_PERM,
10103                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10104                                   NL80211_FLAG_NEED_RTNL,
10105         },
10106 };
10107
10108 /* notification functions */
10109
10110 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
10111                           enum nl80211_commands cmd)
10112 {
10113         struct sk_buff *msg;
10114         struct nl80211_dump_wiphy_state state = {};
10115
10116         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
10117                 cmd != NL80211_CMD_DEL_WIPHY);
10118
10119         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10120         if (!msg)
10121                 return;
10122
10123         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
10124                 nlmsg_free(msg);
10125                 return;
10126         }
10127
10128         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10129                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
10130 }
10131
10132 static int nl80211_add_scan_req(struct sk_buff *msg,
10133                                 struct cfg80211_registered_device *rdev)
10134 {
10135         struct cfg80211_scan_request *req = rdev->scan_req;
10136         struct nlattr *nest;
10137         int i;
10138
10139         if (WARN_ON(!req))
10140                 return 0;
10141
10142         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
10143         if (!nest)
10144                 goto nla_put_failure;
10145         for (i = 0; i < req->n_ssids; i++) {
10146                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
10147                         goto nla_put_failure;
10148         }
10149         nla_nest_end(msg, nest);
10150
10151         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10152         if (!nest)
10153                 goto nla_put_failure;
10154         for (i = 0; i < req->n_channels; i++) {
10155                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10156                         goto nla_put_failure;
10157         }
10158         nla_nest_end(msg, nest);
10159
10160         if (req->ie &&
10161             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
10162                 goto nla_put_failure;
10163
10164         if (req->flags &&
10165             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
10166                 goto nla_put_failure;
10167
10168         return 0;
10169  nla_put_failure:
10170         return -ENOBUFS;
10171 }
10172
10173 static int nl80211_send_scan_msg(struct sk_buff *msg,
10174                                  struct cfg80211_registered_device *rdev,
10175                                  struct wireless_dev *wdev,
10176                                  u32 portid, u32 seq, int flags,
10177                                  u32 cmd)
10178 {
10179         void *hdr;
10180
10181         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10182         if (!hdr)
10183                 return -1;
10184
10185         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10186             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10187                                          wdev->netdev->ifindex)) ||
10188             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10189                 goto nla_put_failure;
10190
10191         /* ignore errors and send incomplete event anyway */
10192         nl80211_add_scan_req(msg, rdev);
10193
10194         return genlmsg_end(msg, hdr);
10195
10196  nla_put_failure:
10197         genlmsg_cancel(msg, hdr);
10198         return -EMSGSIZE;
10199 }
10200
10201 static int
10202 nl80211_send_sched_scan_msg(struct sk_buff *msg,
10203                             struct cfg80211_registered_device *rdev,
10204                             struct net_device *netdev,
10205                             u32 portid, u32 seq, int flags, u32 cmd)
10206 {
10207         void *hdr;
10208
10209         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10210         if (!hdr)
10211                 return -1;
10212
10213         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10214             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10215                 goto nla_put_failure;
10216
10217         return genlmsg_end(msg, hdr);
10218
10219  nla_put_failure:
10220         genlmsg_cancel(msg, hdr);
10221         return -EMSGSIZE;
10222 }
10223
10224 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
10225                              struct wireless_dev *wdev)
10226 {
10227         struct sk_buff *msg;
10228
10229         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10230         if (!msg)
10231                 return;
10232
10233         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10234                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
10235                 nlmsg_free(msg);
10236                 return;
10237         }
10238
10239         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10240                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10241 }
10242
10243 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
10244                                        struct wireless_dev *wdev, bool aborted)
10245 {
10246         struct sk_buff *msg;
10247
10248         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10249         if (!msg)
10250                 return NULL;
10251
10252         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10253                                   aborted ? NL80211_CMD_SCAN_ABORTED :
10254                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
10255                 nlmsg_free(msg);
10256                 return NULL;
10257         }
10258
10259         return msg;
10260 }
10261
10262 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
10263                               struct sk_buff *msg)
10264 {
10265         if (!msg)
10266                 return;
10267
10268         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10269                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10270 }
10271
10272 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
10273                                      struct net_device *netdev)
10274 {
10275         struct sk_buff *msg;
10276
10277         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10278         if (!msg)
10279                 return;
10280
10281         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
10282                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
10283                 nlmsg_free(msg);
10284                 return;
10285         }
10286
10287         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10288                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10289 }
10290
10291 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
10292                              struct net_device *netdev, u32 cmd)
10293 {
10294         struct sk_buff *msg;
10295
10296         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10297         if (!msg)
10298                 return;
10299
10300         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
10301                 nlmsg_free(msg);
10302                 return;
10303         }
10304
10305         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10306                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10307 }
10308
10309 /*
10310  * This can happen on global regulatory changes or device specific settings
10311  * based on custom world regulatory domains.
10312  */
10313 void nl80211_send_reg_change_event(struct regulatory_request *request)
10314 {
10315         struct sk_buff *msg;
10316         void *hdr;
10317
10318         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10319         if (!msg)
10320                 return;
10321
10322         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
10323         if (!hdr) {
10324                 nlmsg_free(msg);
10325                 return;
10326         }
10327
10328         /* Userspace can always count this one always being set */
10329         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
10330                 goto nla_put_failure;
10331
10332         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
10333                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10334                                NL80211_REGDOM_TYPE_WORLD))
10335                         goto nla_put_failure;
10336         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
10337                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10338                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
10339                         goto nla_put_failure;
10340         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
10341                    request->intersect) {
10342                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10343                                NL80211_REGDOM_TYPE_INTERSECTION))
10344                         goto nla_put_failure;
10345         } else {
10346                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10347                                NL80211_REGDOM_TYPE_COUNTRY) ||
10348                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
10349                                    request->alpha2))
10350                         goto nla_put_failure;
10351         }
10352
10353         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
10354             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
10355                 goto nla_put_failure;
10356
10357         genlmsg_end(msg, hdr);
10358
10359         rcu_read_lock();
10360         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10361                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10362         rcu_read_unlock();
10363
10364         return;
10365
10366 nla_put_failure:
10367         genlmsg_cancel(msg, hdr);
10368         nlmsg_free(msg);
10369 }
10370
10371 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
10372                                     struct net_device *netdev,
10373                                     const u8 *buf, size_t len,
10374                                     enum nl80211_commands cmd, gfp_t gfp)
10375 {
10376         struct sk_buff *msg;
10377         void *hdr;
10378
10379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10380         if (!msg)
10381                 return;
10382
10383         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10384         if (!hdr) {
10385                 nlmsg_free(msg);
10386                 return;
10387         }
10388
10389         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10390             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10391             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10392                 goto nla_put_failure;
10393
10394         genlmsg_end(msg, hdr);
10395
10396         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10397                                 NL80211_MCGRP_MLME, gfp);
10398         return;
10399
10400  nla_put_failure:
10401         genlmsg_cancel(msg, hdr);
10402         nlmsg_free(msg);
10403 }
10404
10405 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
10406                           struct net_device *netdev, const u8 *buf,
10407                           size_t len, gfp_t gfp)
10408 {
10409         nl80211_send_mlme_event(rdev, netdev, buf, len,
10410                                 NL80211_CMD_AUTHENTICATE, gfp);
10411 }
10412
10413 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
10414                            struct net_device *netdev, const u8 *buf,
10415                            size_t len, gfp_t gfp)
10416 {
10417         nl80211_send_mlme_event(rdev, netdev, buf, len,
10418                                 NL80211_CMD_ASSOCIATE, gfp);
10419 }
10420
10421 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
10422                          struct net_device *netdev, const u8 *buf,
10423                          size_t len, gfp_t gfp)
10424 {
10425         nl80211_send_mlme_event(rdev, netdev, buf, len,
10426                                 NL80211_CMD_DEAUTHENTICATE, gfp);
10427 }
10428
10429 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
10430                            struct net_device *netdev, const u8 *buf,
10431                            size_t len, gfp_t gfp)
10432 {
10433         nl80211_send_mlme_event(rdev, netdev, buf, len,
10434                                 NL80211_CMD_DISASSOCIATE, gfp);
10435 }
10436
10437 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
10438                                   size_t len)
10439 {
10440         struct wireless_dev *wdev = dev->ieee80211_ptr;
10441         struct wiphy *wiphy = wdev->wiphy;
10442         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10443         const struct ieee80211_mgmt *mgmt = (void *)buf;
10444         u32 cmd;
10445
10446         if (WARN_ON(len < 2))
10447                 return;
10448
10449         if (ieee80211_is_deauth(mgmt->frame_control))
10450                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
10451         else
10452                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
10453
10454         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
10455         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
10456 }
10457 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
10458
10459 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
10460                                       struct net_device *netdev, int cmd,
10461                                       const u8 *addr, gfp_t gfp)
10462 {
10463         struct sk_buff *msg;
10464         void *hdr;
10465
10466         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10467         if (!msg)
10468                 return;
10469
10470         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10471         if (!hdr) {
10472                 nlmsg_free(msg);
10473                 return;
10474         }
10475
10476         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10477             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10478             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
10479             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10480                 goto nla_put_failure;
10481
10482         genlmsg_end(msg, hdr);
10483
10484         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10485                                 NL80211_MCGRP_MLME, gfp);
10486         return;
10487
10488  nla_put_failure:
10489         genlmsg_cancel(msg, hdr);
10490         nlmsg_free(msg);
10491 }
10492
10493 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
10494                                struct net_device *netdev, const u8 *addr,
10495                                gfp_t gfp)
10496 {
10497         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
10498                                   addr, gfp);
10499 }
10500
10501 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
10502                                 struct net_device *netdev, const u8 *addr,
10503                                 gfp_t gfp)
10504 {
10505         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
10506                                   addr, gfp);
10507 }
10508
10509 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
10510                                  struct net_device *netdev, const u8 *bssid,
10511                                  const u8 *req_ie, size_t req_ie_len,
10512                                  const u8 *resp_ie, size_t resp_ie_len,
10513                                  u16 status, gfp_t gfp)
10514 {
10515         struct sk_buff *msg;
10516         void *hdr;
10517
10518         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10519         if (!msg)
10520                 return;
10521
10522         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10523         if (!hdr) {
10524                 nlmsg_free(msg);
10525                 return;
10526         }
10527
10528         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10529             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10530             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10531             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10532             (req_ie &&
10533              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10534             (resp_ie &&
10535              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10536                 goto nla_put_failure;
10537
10538         genlmsg_end(msg, hdr);
10539
10540         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10541                                 NL80211_MCGRP_MLME, gfp);
10542         return;
10543
10544  nla_put_failure:
10545         genlmsg_cancel(msg, hdr);
10546         nlmsg_free(msg);
10547
10548 }
10549
10550 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10551                          struct net_device *netdev, const u8 *bssid,
10552                          const u8 *req_ie, size_t req_ie_len,
10553                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10554 {
10555         struct sk_buff *msg;
10556         void *hdr;
10557
10558         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10559         if (!msg)
10560                 return;
10561
10562         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10563         if (!hdr) {
10564                 nlmsg_free(msg);
10565                 return;
10566         }
10567
10568         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10569             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10570             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10571             (req_ie &&
10572              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10573             (resp_ie &&
10574              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10575                 goto nla_put_failure;
10576
10577         genlmsg_end(msg, hdr);
10578
10579         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10580                                 NL80211_MCGRP_MLME, gfp);
10581         return;
10582
10583  nla_put_failure:
10584         genlmsg_cancel(msg, hdr);
10585         nlmsg_free(msg);
10586
10587 }
10588
10589 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10590                                struct net_device *netdev, u16 reason,
10591                                const u8 *ie, size_t ie_len, bool from_ap)
10592 {
10593         struct sk_buff *msg;
10594         void *hdr;
10595
10596         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10597         if (!msg)
10598                 return;
10599
10600         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10601         if (!hdr) {
10602                 nlmsg_free(msg);
10603                 return;
10604         }
10605
10606         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10607             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10608             (from_ap && reason &&
10609              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10610             (from_ap &&
10611              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10612             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10613                 goto nla_put_failure;
10614
10615         genlmsg_end(msg, hdr);
10616
10617         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10618                                 NL80211_MCGRP_MLME, GFP_KERNEL);
10619         return;
10620
10621  nla_put_failure:
10622         genlmsg_cancel(msg, hdr);
10623         nlmsg_free(msg);
10624
10625 }
10626
10627 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10628                              struct net_device *netdev, const u8 *bssid,
10629                              gfp_t gfp)
10630 {
10631         struct sk_buff *msg;
10632         void *hdr;
10633
10634         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10635         if (!msg)
10636                 return;
10637
10638         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10639         if (!hdr) {
10640                 nlmsg_free(msg);
10641                 return;
10642         }
10643
10644         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10645             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10646             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10647                 goto nla_put_failure;
10648
10649         genlmsg_end(msg, hdr);
10650
10651         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10652                                 NL80211_MCGRP_MLME, gfp);
10653         return;
10654
10655  nla_put_failure:
10656         genlmsg_cancel(msg, hdr);
10657         nlmsg_free(msg);
10658 }
10659
10660 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10661                                         const u8* ie, u8 ie_len, gfp_t gfp)
10662 {
10663         struct wireless_dev *wdev = dev->ieee80211_ptr;
10664         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
10665         struct sk_buff *msg;
10666         void *hdr;
10667
10668         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10669                 return;
10670
10671         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10672
10673         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10674         if (!msg)
10675                 return;
10676
10677         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10678         if (!hdr) {
10679                 nlmsg_free(msg);
10680                 return;
10681         }
10682
10683         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10684             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10685             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10686             (ie_len && ie &&
10687              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10688                 goto nla_put_failure;
10689
10690         genlmsg_end(msg, hdr);
10691
10692         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10693                                 NL80211_MCGRP_MLME, gfp);
10694         return;
10695
10696  nla_put_failure:
10697         genlmsg_cancel(msg, hdr);
10698         nlmsg_free(msg);
10699 }
10700 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10701
10702 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10703                                  struct net_device *netdev, const u8 *addr,
10704                                  enum nl80211_key_type key_type, int key_id,
10705                                  const u8 *tsc, gfp_t gfp)
10706 {
10707         struct sk_buff *msg;
10708         void *hdr;
10709
10710         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10711         if (!msg)
10712                 return;
10713
10714         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10715         if (!hdr) {
10716                 nlmsg_free(msg);
10717                 return;
10718         }
10719
10720         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10721             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10722             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10723             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10724             (key_id != -1 &&
10725              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10726             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10727                 goto nla_put_failure;
10728
10729         genlmsg_end(msg, hdr);
10730
10731         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10732                                 NL80211_MCGRP_MLME, gfp);
10733         return;
10734
10735  nla_put_failure:
10736         genlmsg_cancel(msg, hdr);
10737         nlmsg_free(msg);
10738 }
10739
10740 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10741                                     struct ieee80211_channel *channel_before,
10742                                     struct ieee80211_channel *channel_after)
10743 {
10744         struct sk_buff *msg;
10745         void *hdr;
10746         struct nlattr *nl_freq;
10747
10748         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10749         if (!msg)
10750                 return;
10751
10752         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10753         if (!hdr) {
10754                 nlmsg_free(msg);
10755                 return;
10756         }
10757
10758         /*
10759          * Since we are applying the beacon hint to a wiphy we know its
10760          * wiphy_idx is valid
10761          */
10762         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10763                 goto nla_put_failure;
10764
10765         /* Before */
10766         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10767         if (!nl_freq)
10768                 goto nla_put_failure;
10769         if (nl80211_msg_put_channel(msg, channel_before, false))
10770                 goto nla_put_failure;
10771         nla_nest_end(msg, nl_freq);
10772
10773         /* After */
10774         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10775         if (!nl_freq)
10776                 goto nla_put_failure;
10777         if (nl80211_msg_put_channel(msg, channel_after, false))
10778                 goto nla_put_failure;
10779         nla_nest_end(msg, nl_freq);
10780
10781         genlmsg_end(msg, hdr);
10782
10783         rcu_read_lock();
10784         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10785                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10786         rcu_read_unlock();
10787
10788         return;
10789
10790 nla_put_failure:
10791         genlmsg_cancel(msg, hdr);
10792         nlmsg_free(msg);
10793 }
10794
10795 static void nl80211_send_remain_on_chan_event(
10796         int cmd, struct cfg80211_registered_device *rdev,
10797         struct wireless_dev *wdev, u64 cookie,
10798         struct ieee80211_channel *chan,
10799         unsigned int duration, gfp_t gfp)
10800 {
10801         struct sk_buff *msg;
10802         void *hdr;
10803
10804         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10805         if (!msg)
10806                 return;
10807
10808         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10809         if (!hdr) {
10810                 nlmsg_free(msg);
10811                 return;
10812         }
10813
10814         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10815             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10816                                          wdev->netdev->ifindex)) ||
10817             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10818             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10819             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10820                         NL80211_CHAN_NO_HT) ||
10821             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10822                 goto nla_put_failure;
10823
10824         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10825             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10826                 goto nla_put_failure;
10827
10828         genlmsg_end(msg, hdr);
10829
10830         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10831                                 NL80211_MCGRP_MLME, gfp);
10832         return;
10833
10834  nla_put_failure:
10835         genlmsg_cancel(msg, hdr);
10836         nlmsg_free(msg);
10837 }
10838
10839 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10840                                struct ieee80211_channel *chan,
10841                                unsigned int duration, gfp_t gfp)
10842 {
10843         struct wiphy *wiphy = wdev->wiphy;
10844         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10845
10846         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10847         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10848                                           rdev, wdev, cookie, chan,
10849                                           duration, gfp);
10850 }
10851 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10852
10853 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10854                                         struct ieee80211_channel *chan,
10855                                         gfp_t gfp)
10856 {
10857         struct wiphy *wiphy = wdev->wiphy;
10858         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10859
10860         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10861         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10862                                           rdev, wdev, cookie, chan, 0, gfp);
10863 }
10864 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10865
10866 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10867                       struct station_info *sinfo, gfp_t gfp)
10868 {
10869         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10870         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10871         struct sk_buff *msg;
10872
10873         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10874
10875         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10876         if (!msg)
10877                 return;
10878
10879         if (nl80211_send_station(msg, 0, 0, 0,
10880                                  rdev, dev, mac_addr, sinfo) < 0) {
10881                 nlmsg_free(msg);
10882                 return;
10883         }
10884
10885         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10886                                 NL80211_MCGRP_MLME, gfp);
10887 }
10888 EXPORT_SYMBOL(cfg80211_new_sta);
10889
10890 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10891 {
10892         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10893         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10894         struct sk_buff *msg;
10895         void *hdr;
10896
10897         trace_cfg80211_del_sta(dev, mac_addr);
10898
10899         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10900         if (!msg)
10901                 return;
10902
10903         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10904         if (!hdr) {
10905                 nlmsg_free(msg);
10906                 return;
10907         }
10908
10909         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10910             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10911                 goto nla_put_failure;
10912
10913         genlmsg_end(msg, hdr);
10914
10915         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10916                                 NL80211_MCGRP_MLME, gfp);
10917         return;
10918
10919  nla_put_failure:
10920         genlmsg_cancel(msg, hdr);
10921         nlmsg_free(msg);
10922 }
10923 EXPORT_SYMBOL(cfg80211_del_sta);
10924
10925 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10926                           enum nl80211_connect_failed_reason reason,
10927                           gfp_t gfp)
10928 {
10929         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10930         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10931         struct sk_buff *msg;
10932         void *hdr;
10933
10934         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10935         if (!msg)
10936                 return;
10937
10938         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10939         if (!hdr) {
10940                 nlmsg_free(msg);
10941                 return;
10942         }
10943
10944         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10945             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10946             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10947                 goto nla_put_failure;
10948
10949         genlmsg_end(msg, hdr);
10950
10951         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10952                                 NL80211_MCGRP_MLME, gfp);
10953         return;
10954
10955  nla_put_failure:
10956         genlmsg_cancel(msg, hdr);
10957         nlmsg_free(msg);
10958 }
10959 EXPORT_SYMBOL(cfg80211_conn_failed);
10960
10961 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10962                                        const u8 *addr, gfp_t gfp)
10963 {
10964         struct wireless_dev *wdev = dev->ieee80211_ptr;
10965         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
10966         struct sk_buff *msg;
10967         void *hdr;
10968         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10969
10970         if (!nlportid)
10971                 return false;
10972
10973         msg = nlmsg_new(100, gfp);
10974         if (!msg)
10975                 return true;
10976
10977         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10978         if (!hdr) {
10979                 nlmsg_free(msg);
10980                 return true;
10981         }
10982
10983         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10984             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10985             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10986                 goto nla_put_failure;
10987
10988         genlmsg_end(msg, hdr);
10989         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10990         return true;
10991
10992  nla_put_failure:
10993         genlmsg_cancel(msg, hdr);
10994         nlmsg_free(msg);
10995         return true;
10996 }
10997
10998 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10999                                 const u8 *addr, gfp_t gfp)
11000 {
11001         struct wireless_dev *wdev = dev->ieee80211_ptr;
11002         bool ret;
11003
11004         trace_cfg80211_rx_spurious_frame(dev, addr);
11005
11006         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11007                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
11008                 trace_cfg80211_return_bool(false);
11009                 return false;
11010         }
11011         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
11012                                          addr, gfp);
11013         trace_cfg80211_return_bool(ret);
11014         return ret;
11015 }
11016 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
11017
11018 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
11019                                         const u8 *addr, gfp_t gfp)
11020 {
11021         struct wireless_dev *wdev = dev->ieee80211_ptr;
11022         bool ret;
11023
11024         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
11025
11026         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11027                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11028                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
11029                 trace_cfg80211_return_bool(false);
11030                 return false;
11031         }
11032         ret = __nl80211_unexpected_frame(dev,
11033                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
11034                                          addr, gfp);
11035         trace_cfg80211_return_bool(ret);
11036         return ret;
11037 }
11038 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
11039
11040 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
11041                       struct wireless_dev *wdev, u32 nlportid,
11042                       int freq, int sig_dbm,
11043                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
11044 {
11045         struct net_device *netdev = wdev->netdev;
11046         struct sk_buff *msg;
11047         void *hdr;
11048
11049         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11050         if (!msg)
11051                 return -ENOMEM;
11052
11053         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11054         if (!hdr) {
11055                 nlmsg_free(msg);
11056                 return -ENOMEM;
11057         }
11058
11059         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11060             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11061                                         netdev->ifindex)) ||
11062             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11063             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
11064             (sig_dbm &&
11065              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11066             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11067             (flags &&
11068              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
11069                 goto nla_put_failure;
11070
11071         genlmsg_end(msg, hdr);
11072
11073         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11074
11075  nla_put_failure:
11076         genlmsg_cancel(msg, hdr);
11077         nlmsg_free(msg);
11078         return -ENOBUFS;
11079 }
11080
11081 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
11082                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
11083 {
11084         struct wiphy *wiphy = wdev->wiphy;
11085         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11086         struct net_device *netdev = wdev->netdev;
11087         struct sk_buff *msg;
11088         void *hdr;
11089
11090         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
11091
11092         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11093         if (!msg)
11094                 return;
11095
11096         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
11097         if (!hdr) {
11098                 nlmsg_free(msg);
11099                 return;
11100         }
11101
11102         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11103             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11104                                    netdev->ifindex)) ||
11105             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11106             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11107             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11108             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
11109                 goto nla_put_failure;
11110
11111         genlmsg_end(msg, hdr);
11112
11113         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11114                                 NL80211_MCGRP_MLME, gfp);
11115         return;
11116
11117  nla_put_failure:
11118         genlmsg_cancel(msg, hdr);
11119         nlmsg_free(msg);
11120 }
11121 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
11122
11123 void cfg80211_cqm_rssi_notify(struct net_device *dev,
11124                               enum nl80211_cqm_rssi_threshold_event rssi_event,
11125                               gfp_t gfp)
11126 {
11127         struct wireless_dev *wdev = dev->ieee80211_ptr;
11128         struct wiphy *wiphy = wdev->wiphy;
11129         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11130         struct sk_buff *msg;
11131         struct nlattr *pinfoattr;
11132         void *hdr;
11133
11134         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
11135
11136         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11137         if (!msg)
11138                 return;
11139
11140         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11141         if (!hdr) {
11142                 nlmsg_free(msg);
11143                 return;
11144         }
11145
11146         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11147             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
11148                 goto nla_put_failure;
11149
11150         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11151         if (!pinfoattr)
11152                 goto nla_put_failure;
11153
11154         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
11155                         rssi_event))
11156                 goto nla_put_failure;
11157
11158         nla_nest_end(msg, pinfoattr);
11159
11160         genlmsg_end(msg, hdr);
11161
11162         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11163                                 NL80211_MCGRP_MLME, gfp);
11164         return;
11165
11166  nla_put_failure:
11167         genlmsg_cancel(msg, hdr);
11168         nlmsg_free(msg);
11169 }
11170 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
11171
11172 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
11173                                      struct net_device *netdev, const u8 *bssid,
11174                                      const u8 *replay_ctr, gfp_t gfp)
11175 {
11176         struct sk_buff *msg;
11177         struct nlattr *rekey_attr;
11178         void *hdr;
11179
11180         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11181         if (!msg)
11182                 return;
11183
11184         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
11185         if (!hdr) {
11186                 nlmsg_free(msg);
11187                 return;
11188         }
11189
11190         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11191             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11192             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11193                 goto nla_put_failure;
11194
11195         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
11196         if (!rekey_attr)
11197                 goto nla_put_failure;
11198
11199         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
11200                     NL80211_REPLAY_CTR_LEN, replay_ctr))
11201                 goto nla_put_failure;
11202
11203         nla_nest_end(msg, rekey_attr);
11204
11205         genlmsg_end(msg, hdr);
11206
11207         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11208                                 NL80211_MCGRP_MLME, gfp);
11209         return;
11210
11211  nla_put_failure:
11212         genlmsg_cancel(msg, hdr);
11213         nlmsg_free(msg);
11214 }
11215
11216 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
11217                                const u8 *replay_ctr, gfp_t gfp)
11218 {
11219         struct wireless_dev *wdev = dev->ieee80211_ptr;
11220         struct wiphy *wiphy = wdev->wiphy;
11221         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11222
11223         trace_cfg80211_gtk_rekey_notify(dev, bssid);
11224         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
11225 }
11226 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
11227
11228 static void
11229 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
11230                                struct net_device *netdev, int index,
11231                                const u8 *bssid, bool preauth, gfp_t gfp)
11232 {
11233         struct sk_buff *msg;
11234         struct nlattr *attr;
11235         void *hdr;
11236
11237         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11238         if (!msg)
11239                 return;
11240
11241         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
11242         if (!hdr) {
11243                 nlmsg_free(msg);
11244                 return;
11245         }
11246
11247         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11248             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11249                 goto nla_put_failure;
11250
11251         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
11252         if (!attr)
11253                 goto nla_put_failure;
11254
11255         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
11256             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
11257             (preauth &&
11258              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
11259                 goto nla_put_failure;
11260
11261         nla_nest_end(msg, attr);
11262
11263         genlmsg_end(msg, hdr);
11264
11265         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11266                                 NL80211_MCGRP_MLME, gfp);
11267         return;
11268
11269  nla_put_failure:
11270         genlmsg_cancel(msg, hdr);
11271         nlmsg_free(msg);
11272 }
11273
11274 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
11275                                      const u8 *bssid, bool preauth, gfp_t gfp)
11276 {
11277         struct wireless_dev *wdev = dev->ieee80211_ptr;
11278         struct wiphy *wiphy = wdev->wiphy;
11279         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11280
11281         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
11282         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
11283 }
11284 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
11285
11286 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
11287                                      struct net_device *netdev,
11288                                      struct cfg80211_chan_def *chandef,
11289                                      gfp_t gfp)
11290 {
11291         struct sk_buff *msg;
11292         void *hdr;
11293
11294         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11295         if (!msg)
11296                 return;
11297
11298         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
11299         if (!hdr) {
11300                 nlmsg_free(msg);
11301                 return;
11302         }
11303
11304         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11305                 goto nla_put_failure;
11306
11307         if (nl80211_send_chandef(msg, chandef))
11308                 goto nla_put_failure;
11309
11310         genlmsg_end(msg, hdr);
11311
11312         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11313                                 NL80211_MCGRP_MLME, gfp);
11314         return;
11315
11316  nla_put_failure:
11317         genlmsg_cancel(msg, hdr);
11318         nlmsg_free(msg);
11319 }
11320
11321 void cfg80211_ch_switch_notify(struct net_device *dev,
11322                                struct cfg80211_chan_def *chandef)
11323 {
11324         struct wireless_dev *wdev = dev->ieee80211_ptr;
11325         struct wiphy *wiphy = wdev->wiphy;
11326         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11327
11328         ASSERT_WDEV_LOCK(wdev);
11329
11330         trace_cfg80211_ch_switch_notify(dev, chandef);
11331
11332         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11333                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11334                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
11335                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
11336                 return;
11337
11338         wdev->chandef = *chandef;
11339         wdev->preset_chandef = *chandef;
11340         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
11341 }
11342 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
11343
11344 void cfg80211_cqm_txe_notify(struct net_device *dev,
11345                              const u8 *peer, u32 num_packets,
11346                              u32 rate, u32 intvl, gfp_t gfp)
11347 {
11348         struct wireless_dev *wdev = dev->ieee80211_ptr;
11349         struct wiphy *wiphy = wdev->wiphy;
11350         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11351         struct sk_buff *msg;
11352         struct nlattr *pinfoattr;
11353         void *hdr;
11354
11355         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
11356         if (!msg)
11357                 return;
11358
11359         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11360         if (!hdr) {
11361                 nlmsg_free(msg);
11362                 return;
11363         }
11364
11365         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11366             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11367             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11368                 goto nla_put_failure;
11369
11370         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11371         if (!pinfoattr)
11372                 goto nla_put_failure;
11373
11374         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
11375                 goto nla_put_failure;
11376
11377         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
11378                 goto nla_put_failure;
11379
11380         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
11381                 goto nla_put_failure;
11382
11383         nla_nest_end(msg, pinfoattr);
11384
11385         genlmsg_end(msg, hdr);
11386
11387         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11388                                 NL80211_MCGRP_MLME, gfp);
11389         return;
11390
11391  nla_put_failure:
11392         genlmsg_cancel(msg, hdr);
11393         nlmsg_free(msg);
11394 }
11395 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
11396
11397 void
11398 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
11399                      const struct cfg80211_chan_def *chandef,
11400                      enum nl80211_radar_event event,
11401                      struct net_device *netdev, gfp_t gfp)
11402 {
11403         struct sk_buff *msg;
11404         void *hdr;
11405
11406         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11407         if (!msg)
11408                 return;
11409
11410         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
11411         if (!hdr) {
11412                 nlmsg_free(msg);
11413                 return;
11414         }
11415
11416         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
11417                 goto nla_put_failure;
11418
11419         /* NOP and radar events don't need a netdev parameter */
11420         if (netdev) {
11421                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
11422
11423                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11424                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11425                         goto nla_put_failure;
11426         }
11427
11428         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
11429                 goto nla_put_failure;
11430
11431         if (nl80211_send_chandef(msg, chandef))
11432                 goto nla_put_failure;
11433
11434         genlmsg_end(msg, hdr);
11435
11436         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11437                                 NL80211_MCGRP_MLME, gfp);
11438         return;
11439
11440  nla_put_failure:
11441         genlmsg_cancel(msg, hdr);
11442         nlmsg_free(msg);
11443 }
11444
11445 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
11446                                  const u8 *peer, u32 num_packets, gfp_t gfp)
11447 {
11448         struct wireless_dev *wdev = dev->ieee80211_ptr;
11449         struct wiphy *wiphy = wdev->wiphy;
11450         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11451         struct sk_buff *msg;
11452         struct nlattr *pinfoattr;
11453         void *hdr;
11454
11455         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
11456
11457         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11458         if (!msg)
11459                 return;
11460
11461         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11462         if (!hdr) {
11463                 nlmsg_free(msg);
11464                 return;
11465         }
11466
11467         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11468             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11469             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11470                 goto nla_put_failure;
11471
11472         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11473         if (!pinfoattr)
11474                 goto nla_put_failure;
11475
11476         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
11477                 goto nla_put_failure;
11478
11479         nla_nest_end(msg, pinfoattr);
11480
11481         genlmsg_end(msg, hdr);
11482
11483         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11484                                 NL80211_MCGRP_MLME, gfp);
11485         return;
11486
11487  nla_put_failure:
11488         genlmsg_cancel(msg, hdr);
11489         nlmsg_free(msg);
11490 }
11491 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
11492
11493 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
11494                            u64 cookie, bool acked, gfp_t gfp)
11495 {
11496         struct wireless_dev *wdev = dev->ieee80211_ptr;
11497         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11498         struct sk_buff *msg;
11499         void *hdr;
11500
11501         trace_cfg80211_probe_status(dev, addr, cookie, acked);
11502
11503         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11504
11505         if (!msg)
11506                 return;
11507
11508         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
11509         if (!hdr) {
11510                 nlmsg_free(msg);
11511                 return;
11512         }
11513
11514         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11515             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11516             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11517             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11518             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11519                 goto nla_put_failure;
11520
11521         genlmsg_end(msg, hdr);
11522
11523         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11524                                 NL80211_MCGRP_MLME, gfp);
11525         return;
11526
11527  nla_put_failure:
11528         genlmsg_cancel(msg, hdr);
11529         nlmsg_free(msg);
11530 }
11531 EXPORT_SYMBOL(cfg80211_probe_status);
11532
11533 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11534                                  const u8 *frame, size_t len,
11535                                  int freq, int sig_dbm)
11536 {
11537         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11538         struct sk_buff *msg;
11539         void *hdr;
11540         struct cfg80211_beacon_registration *reg;
11541
11542         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11543
11544         spin_lock_bh(&rdev->beacon_registrations_lock);
11545         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11546                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11547                 if (!msg) {
11548                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11549                         return;
11550                 }
11551
11552                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11553                 if (!hdr)
11554                         goto nla_put_failure;
11555
11556                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11557                     (freq &&
11558                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11559                     (sig_dbm &&
11560                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11561                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11562                         goto nla_put_failure;
11563
11564                 genlmsg_end(msg, hdr);
11565
11566                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11567         }
11568         spin_unlock_bh(&rdev->beacon_registrations_lock);
11569         return;
11570
11571  nla_put_failure:
11572         spin_unlock_bh(&rdev->beacon_registrations_lock);
11573         if (hdr)
11574                 genlmsg_cancel(msg, hdr);
11575         nlmsg_free(msg);
11576 }
11577 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11578
11579 #ifdef CONFIG_PM
11580 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11581                                    struct cfg80211_wowlan_wakeup *wakeup,
11582                                    gfp_t gfp)
11583 {
11584         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11585         struct sk_buff *msg;
11586         void *hdr;
11587         int size = 200;
11588
11589         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11590
11591         if (wakeup)
11592                 size += wakeup->packet_present_len;
11593
11594         msg = nlmsg_new(size, gfp);
11595         if (!msg)
11596                 return;
11597
11598         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11599         if (!hdr)
11600                 goto free_msg;
11601
11602         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11603             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11604                 goto free_msg;
11605
11606         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11607                                         wdev->netdev->ifindex))
11608                 goto free_msg;
11609
11610         if (wakeup) {
11611                 struct nlattr *reasons;
11612
11613                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11614                 if (!reasons)
11615                         goto free_msg;
11616
11617                 if (wakeup->disconnect &&
11618                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11619                         goto free_msg;
11620                 if (wakeup->magic_pkt &&
11621                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11622                         goto free_msg;
11623                 if (wakeup->gtk_rekey_failure &&
11624                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11625                         goto free_msg;
11626                 if (wakeup->eap_identity_req &&
11627                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11628                         goto free_msg;
11629                 if (wakeup->four_way_handshake &&
11630                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11631                         goto free_msg;
11632                 if (wakeup->rfkill_release &&
11633                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11634                         goto free_msg;
11635
11636                 if (wakeup->pattern_idx >= 0 &&
11637                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11638                                 wakeup->pattern_idx))
11639                         goto free_msg;
11640
11641                 if (wakeup->tcp_match &&
11642                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
11643                         goto free_msg;
11644
11645                 if (wakeup->tcp_connlost &&
11646                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
11647                         goto free_msg;
11648
11649                 if (wakeup->tcp_nomoretokens &&
11650                     nla_put_flag(msg,
11651                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
11652                         goto free_msg;
11653
11654                 if (wakeup->packet) {
11655                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11656                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11657
11658                         if (!wakeup->packet_80211) {
11659                                 pkt_attr =
11660                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11661                                 len_attr =
11662                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11663                         }
11664
11665                         if (wakeup->packet_len &&
11666                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11667                                 goto free_msg;
11668
11669                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11670                                     wakeup->packet))
11671                                 goto free_msg;
11672                 }
11673
11674                 nla_nest_end(msg, reasons);
11675         }
11676
11677         genlmsg_end(msg, hdr);
11678
11679         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11680                                 NL80211_MCGRP_MLME, gfp);
11681         return;
11682
11683  free_msg:
11684         nlmsg_free(msg);
11685 }
11686 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11687 #endif
11688
11689 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11690                                 enum nl80211_tdls_operation oper,
11691                                 u16 reason_code, gfp_t gfp)
11692 {
11693         struct wireless_dev *wdev = dev->ieee80211_ptr;
11694         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11695         struct sk_buff *msg;
11696         void *hdr;
11697
11698         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11699                                          reason_code);
11700
11701         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11702         if (!msg)
11703                 return;
11704
11705         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11706         if (!hdr) {
11707                 nlmsg_free(msg);
11708                 return;
11709         }
11710
11711         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11712             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11713             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11714             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11715             (reason_code > 0 &&
11716              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11717                 goto nla_put_failure;
11718
11719         genlmsg_end(msg, hdr);
11720
11721         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11722                                 NL80211_MCGRP_MLME, gfp);
11723         return;
11724
11725  nla_put_failure:
11726         genlmsg_cancel(msg, hdr);
11727         nlmsg_free(msg);
11728 }
11729 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11730
11731 static int nl80211_netlink_notify(struct notifier_block * nb,
11732                                   unsigned long state,
11733                                   void *_notify)
11734 {
11735         struct netlink_notify *notify = _notify;
11736         struct cfg80211_registered_device *rdev;
11737         struct wireless_dev *wdev;
11738         struct cfg80211_beacon_registration *reg, *tmp;
11739
11740         if (state != NETLINK_URELEASE)
11741                 return NOTIFY_DONE;
11742
11743         rcu_read_lock();
11744
11745         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11746                 bool schedule_destroy_work = false;
11747
11748                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
11749                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11750
11751                         if (wdev->owner_nlportid == notify->portid)
11752                                 schedule_destroy_work = true;
11753                 }
11754
11755                 spin_lock_bh(&rdev->beacon_registrations_lock);
11756                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11757                                          list) {
11758                         if (reg->nlportid == notify->portid) {
11759                                 list_del(&reg->list);
11760                                 kfree(reg);
11761                                 break;
11762                         }
11763                 }
11764                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11765
11766                 if (schedule_destroy_work) {
11767                         struct cfg80211_iface_destroy *destroy;
11768
11769                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
11770                         if (destroy) {
11771                                 destroy->nlportid = notify->portid;
11772                                 spin_lock(&rdev->destroy_list_lock);
11773                                 list_add(&destroy->list, &rdev->destroy_list);
11774                                 spin_unlock(&rdev->destroy_list_lock);
11775                                 schedule_work(&rdev->destroy_work);
11776                         }
11777                 }
11778         }
11779
11780         rcu_read_unlock();
11781
11782         return NOTIFY_OK;
11783 }
11784
11785 static struct notifier_block nl80211_netlink_notifier = {
11786         .notifier_call = nl80211_netlink_notify,
11787 };
11788
11789 void cfg80211_ft_event(struct net_device *netdev,
11790                        struct cfg80211_ft_event_params *ft_event)
11791 {
11792         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11793         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11794         struct sk_buff *msg;
11795         void *hdr;
11796
11797         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11798
11799         if (!ft_event->target_ap)
11800                 return;
11801
11802         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11803         if (!msg)
11804                 return;
11805
11806         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11807         if (!hdr)
11808                 goto out;
11809
11810         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11811             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11812             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
11813                 goto out;
11814
11815         if (ft_event->ies &&
11816             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
11817                 goto out;
11818         if (ft_event->ric_ies &&
11819             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11820                     ft_event->ric_ies))
11821                 goto out;
11822
11823         genlmsg_end(msg, hdr);
11824
11825         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11826                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11827         return;
11828  out:
11829         nlmsg_free(msg);
11830 }
11831 EXPORT_SYMBOL(cfg80211_ft_event);
11832
11833 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11834 {
11835         struct cfg80211_registered_device *rdev;
11836         struct sk_buff *msg;
11837         void *hdr;
11838         u32 nlportid;
11839
11840         rdev = wiphy_to_rdev(wdev->wiphy);
11841         if (!rdev->crit_proto_nlportid)
11842                 return;
11843
11844         nlportid = rdev->crit_proto_nlportid;
11845         rdev->crit_proto_nlportid = 0;
11846
11847         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11848         if (!msg)
11849                 return;
11850
11851         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11852         if (!hdr)
11853                 goto nla_put_failure;
11854
11855         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11856             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11857                 goto nla_put_failure;
11858
11859         genlmsg_end(msg, hdr);
11860
11861         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11862         return;
11863
11864  nla_put_failure:
11865         if (hdr)
11866                 genlmsg_cancel(msg, hdr);
11867         nlmsg_free(msg);
11868
11869 }
11870 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11871
11872 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
11873 {
11874         struct wiphy *wiphy = wdev->wiphy;
11875         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11876         struct sk_buff *msg;
11877         void *hdr;
11878
11879         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11880         if (!msg)
11881                 return;
11882
11883         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
11884         if (!hdr)
11885                 goto out;
11886
11887         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11888             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
11889             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11890                 goto out;
11891
11892         genlmsg_end(msg, hdr);
11893
11894         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
11895                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11896         return;
11897  out:
11898         nlmsg_free(msg);
11899 }
11900
11901 /* initialisation/exit functions */
11902
11903 int nl80211_init(void)
11904 {
11905         int err;
11906
11907         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
11908                                                    nl80211_mcgrps);
11909         if (err)
11910                 return err;
11911
11912         err = netlink_register_notifier(&nl80211_netlink_notifier);
11913         if (err)
11914                 goto err_out;
11915
11916         return 0;
11917  err_out:
11918         genl_unregister_family(&nl80211_fam);
11919         return err;
11920 }
11921
11922 void nl80211_exit(void)
11923 {
11924         netlink_unregister_notifier(&nl80211_netlink_notifier);
11925         genl_unregister_family(&nl80211_fam);
11926 }