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 "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25 #include "rdev-ops.h"
  26
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* returns ERR_PTR values */
  50 static struct wireless_dev *
  51 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  52 {
  53         struct cfg80211_registered_device *rdev;
  54         struct wireless_dev *result = NULL;
  55         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  56         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  57         u64 wdev_id;
  58         int wiphy_idx = -1;
  59         int ifidx = -1;
  60
  61         assert_cfg80211_lock();
  62
  63         if (!have_ifidx && !have_wdev_id)
  64                 return ERR_PTR(-EINVAL);
  65
  66         if (have_ifidx)
  67                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  68         if (have_wdev_id) {
  69                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  70                 wiphy_idx = wdev_id >> 32;
  71         }
  72
  73         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  74                 struct wireless_dev *wdev;
  75
  76                 if (wiphy_net(&rdev->wiphy) != netns)
  77                         continue;
  78
  79                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  80                         continue;
  81
  82                 mutex_lock(&rdev->devlist_mtx);
  83                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94                 mutex_unlock(&rdev->devlist_mtx);
  95
  96                 if (result)
  97                         break;
  98         }
  99
 100         if (result)
 101                 return result;
 102         return ERR_PTR(-ENODEV);
 103 }
 104
 105 static struct cfg80211_registered_device *
 106 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 107 {
 108         struct cfg80211_registered_device *rdev = NULL, *tmp;
 109         struct net_device *netdev;
 110
 111         assert_cfg80211_lock();
 112
 113         if (!attrs[NL80211_ATTR_WIPHY] &&
 114             !attrs[NL80211_ATTR_IFINDEX] &&
 115             !attrs[NL80211_ATTR_WDEV])
 116                 return ERR_PTR(-EINVAL);
 117
 118         if (attrs[NL80211_ATTR_WIPHY])
 119                 rdev = cfg80211_rdev_by_wiphy_idx(
 120                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 121
 122         if (attrs[NL80211_ATTR_WDEV]) {
 123                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 124                 struct wireless_dev *wdev;
 125                 bool found = false;
 126
 127                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 128                 if (tmp) {
 129                         /* make sure wdev exists */
 130                         mutex_lock(&tmp->devlist_mtx);
 131                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 132                                 if (wdev->identifier != (u32)wdev_id)
 133                                         continue;
 134                                 found = true;
 135                                 break;
 136                         }
 137                         mutex_unlock(&tmp->devlist_mtx);
 138
 139                         if (!found)
 140                                 tmp = NULL;
 141
 142                         if (rdev && tmp != rdev)
 143                                 return ERR_PTR(-EINVAL);
 144                         rdev = tmp;
 145                 }
 146         }
 147
 148         if (attrs[NL80211_ATTR_IFINDEX]) {
 149                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 150                 netdev = dev_get_by_index(netns, ifindex);
 151                 if (netdev) {
 152                         if (netdev->ieee80211_ptr)
 153                                 tmp = wiphy_to_dev(
 154                                                 netdev->ieee80211_ptr->wiphy);
 155                         else
 156                                 tmp = NULL;
 157
 158                         dev_put(netdev);
 159
 160                         /* not wireless device -- return error */
 161                         if (!tmp)
 162                                 return ERR_PTR(-EINVAL);
 163
 164                         /* mismatch -- return error */
 165                         if (rdev && tmp != rdev)
 166                                 return ERR_PTR(-EINVAL);
 167
 168                         rdev = tmp;
 169                 }
 170         }
 171
 172         if (!rdev)
 173                 return ERR_PTR(-ENODEV);
 174
 175         if (netns != wiphy_net(&rdev->wiphy))
 176                 return ERR_PTR(-ENODEV);
 177
 178         return rdev;
 179 }
 180
 181 /*
 182  * This function returns a pointer to the driver
 183  * that the genl_info item that is passed refers to.
 184  * If successful, it returns non-NULL and also locks
 185  * the driver's mutex!
 186  *
 187  * This means that you need to call cfg80211_unlock_rdev()
 188  * before being allowed to acquire &cfg80211_mutex!
 189  *
 190  * This is necessary because we need to lock the global
 191  * mutex to get an item off the list safely, and then
 192  * we lock the rdev mutex so it doesn't go away under us.
 193  *
 194  * We don't want to keep cfg80211_mutex locked
 195  * for all the time in order to allow requests on
 196  * other interfaces to go through at the same time.
 197  *
 198  * The result of this can be a PTR_ERR and hence must
 199  * be checked with IS_ERR() for errors.
 200  */
 201 static struct cfg80211_registered_device *
 202 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 203 {
 204         struct cfg80211_registered_device *rdev;
 205
 206         mutex_lock(&cfg80211_mutex);
 207         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 208
 209         /* if it is not an error we grab the lock on
 210          * it to assure it won't be going away while
 211          * we operate on it */
 212         if (!IS_ERR(rdev))
 213                 mutex_lock(&rdev->mtx);
 214
 215         mutex_unlock(&cfg80211_mutex);
 216
 217         return rdev;
 218 }
 219
 220 /* policy for the attributes */
 221 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 222         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 223         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 224                                       .len = 20-1 },
 225         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 226
 227         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 229         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 232
 233         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 234         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 236         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 238
 239         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 240         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 242
 243         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 244         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 245
 246         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 247         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 248                                     .len = WLAN_MAX_KEY_LEN },
 249         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 250         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 251         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 252         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 253         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 256         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 257         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 258                                        .len = IEEE80211_MAX_DATA_LEN },
 259         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 260                                        .len = IEEE80211_MAX_DATA_LEN },
 261         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 262         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 264         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 265                                                .len = NL80211_MAX_SUPP_RATES },
 266         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 267         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 268         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 269         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 270                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 271         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 272
 273         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 274         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 277         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 280                                            .len = NL80211_MAX_SUPP_RATES },
 281         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 282
 283         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 284         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 285
 286         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 287
 288         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 289         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 290                               .len = IEEE80211_MAX_DATA_LEN },
 291         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 292         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 293
 294         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 295                                 .len = IEEE80211_MAX_SSID_LEN },
 296         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 297         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 301         [NL80211_ATTR_STA_FLAGS2] = {
 302                 .len = sizeof(struct nl80211_sta_flag_update),
 303         },
 304         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 305         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 306         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 307         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 309         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 310         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 311         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 312         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 313                                  .len = WLAN_PMKID_LEN },
 314         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 315         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 316         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 317         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 318                                  .len = IEEE80211_MAX_DATA_LEN },
 319         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 320         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 321         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 322         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 323         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 326         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 327         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 330         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 332         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 334         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 335         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 336         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 338         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 339                                          .len = IEEE80211_MAX_DATA_LEN },
 340         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 341                                          .len = IEEE80211_MAX_DATA_LEN },
 342         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 344         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 346         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 352                                       .len = IEEE80211_MAX_DATA_LEN },
 353         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 354         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 355         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 356                 .len = NL80211_HT_CAPABILITY_LEN
 357         },
 358         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 359         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 360         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 361         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 362         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 363         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 364         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 365         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 366         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 367         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 368 };
 369
 370 /* policy for the key attributes */
 371 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 372         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 373         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 374         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 375         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 376         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 377         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 378         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 379         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 380 };
 381
 382 /* policy for the key default flags */
 383 static const struct nla_policy
 384 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 385         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 386         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 387 };
 388
 389 /* policy for WoWLAN attributes */
 390 static const struct nla_policy
 391 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 392         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 394         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 395         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 396         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 397         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 398         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 400 };
 401
 402 /* policy for GTK rekey offload attributes */
 403 static const struct nla_policy
 404 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 405         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 406         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 407         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 408 };
 409
 410 static const struct nla_policy
 411 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 412         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 413                                                  .len = IEEE80211_MAX_SSID_LEN },
 414         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 415 };
 416
 417 /* ifidx get helper */
 418 static int nl80211_get_ifidx(struct netlink_callback *cb)
 419 {
 420         int res;
 421
 422         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 423                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 424                           nl80211_policy);
 425         if (res)
 426                 return res;
 427
 428         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 429                 return -EINVAL;
 430
 431         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 432         if (!res)
 433                 return -EINVAL;
 434         return res;
 435 }
 436
 437 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 438                                        struct netlink_callback *cb,
 439                                        struct cfg80211_registered_device **rdev,
 440                                        struct net_device **dev)
 441 {
 442         int ifidx = cb->args[0];
 443         int err;
 444
 445         if (!ifidx)
 446                 ifidx = nl80211_get_ifidx(cb);
 447         if (ifidx < 0)
 448                 return ifidx;
 449
 450         cb->args[0] = ifidx;
 451
 452         rtnl_lock();
 453
 454         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 455         if (!*dev) {
 456                 err = -ENODEV;
 457                 goto out_rtnl;
 458         }
 459
 460         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 461         if (IS_ERR(*rdev)) {
 462                 err = PTR_ERR(*rdev);
 463                 goto out_rtnl;
 464         }
 465
 466         return 0;
 467  out_rtnl:
 468         rtnl_unlock();
 469         return err;
 470 }
 471
 472 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 473 {
 474         cfg80211_unlock_rdev(rdev);
 475         rtnl_unlock();
 476 }
 477
 478 /* IE validation */
 479 static bool is_valid_ie_attr(const struct nlattr *attr)
 480 {
 481         const u8 *pos;
 482         int len;
 483
 484         if (!attr)
 485                 return true;
 486
 487         pos = nla_data(attr);
 488         len = nla_len(attr);
 489
 490         while (len) {
 491                 u8 elemlen;
 492
 493                 if (len < 2)
 494                         return false;
 495                 len -= 2;
 496
 497                 elemlen = pos[1];
 498                 if (elemlen > len)
 499                         return false;
 500
 501                 len -= elemlen;
 502                 pos += 2 + elemlen;
 503         }
 504
 505         return true;
 506 }
 507
 508 /* message building helper */
 509 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 510                                    int flags, u8 cmd)
 511 {
 512         /* since there is no private header just add the generic one */
 513         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 514 }
 515
 516 static int nl80211_msg_put_channel(struct sk_buff *msg,
 517                                    struct ieee80211_channel *chan)
 518 {
 519         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 520                         chan->center_freq))
 521                 goto nla_put_failure;
 522
 523         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 524             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 525                 goto nla_put_failure;
 526         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 527             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 528                 goto nla_put_failure;
 529         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 530             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 531                 goto nla_put_failure;
 532         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 533             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 534                 goto nla_put_failure;
 535
 536         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 537                         DBM_TO_MBM(chan->max_power)))
 538                 goto nla_put_failure;
 539
 540         return 0;
 541
 542  nla_put_failure:
 543         return -ENOBUFS;
 544 }
 545
 546 /* netlink command implementations */
 547
 548 struct key_parse {
 549         struct key_params p;
 550         int idx;
 551         int type;
 552         bool def, defmgmt;
 553         bool def_uni, def_multi;
 554 };
 555
 556 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 557 {
 558         struct nlattr *tb[NL80211_KEY_MAX + 1];
 559         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 560                                    nl80211_key_policy);
 561         if (err)
 562                 return err;
 563
 564         k->def = !!tb[NL80211_KEY_DEFAULT];
 565         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 566
 567         if (k->def) {
 568                 k->def_uni = true;
 569                 k->def_multi = true;
 570         }
 571         if (k->defmgmt)
 572                 k->def_multi = true;
 573
 574         if (tb[NL80211_KEY_IDX])
 575                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 576
 577         if (tb[NL80211_KEY_DATA]) {
 578                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 579                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 580         }
 581
 582         if (tb[NL80211_KEY_SEQ]) {
 583                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 584                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 585         }
 586
 587         if (tb[NL80211_KEY_CIPHER])
 588                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 589
 590         if (tb[NL80211_KEY_TYPE]) {
 591                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 592                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 593                         return -EINVAL;
 594         }
 595
 596         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 597                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 598                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 599                                        tb[NL80211_KEY_DEFAULT_TYPES],
 600                                        nl80211_key_default_policy);
 601                 if (err)
 602                         return err;
 603
 604                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 605                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 606         }
 607
 608         return 0;
 609 }
 610
 611 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 612 {
 613         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 614                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 615                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 616         }
 617
 618         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 619                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 620                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 621         }
 622
 623         if (info->attrs[NL80211_ATTR_KEY_IDX])
 624                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 625
 626         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 627                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 628
 629         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 630         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 631
 632         if (k->def) {
 633                 k->def_uni = true;
 634                 k->def_multi = true;
 635         }
 636         if (k->defmgmt)
 637                 k->def_multi = true;
 638
 639         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 640                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 641                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 642                         return -EINVAL;
 643         }
 644
 645         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 646                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 647                 int err = nla_parse_nested(
 648                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 649                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 650                                 nl80211_key_default_policy);
 651                 if (err)
 652                         return err;
 653
 654                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 655                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 656         }
 657
 658         return 0;
 659 }
 660
 661 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 662 {
 663         int err;
 664
 665         memset(k, 0, sizeof(*k));
 666         k->idx = -1;
 667         k->type = -1;
 668
 669         if (info->attrs[NL80211_ATTR_KEY])
 670                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 671         else
 672                 err = nl80211_parse_key_old(info, k);
 673
 674         if (err)
 675                 return err;
 676
 677         if (k->def && k->defmgmt)
 678                 return -EINVAL;
 679
 680         if (k->defmgmt) {
 681                 if (k->def_uni || !k->def_multi)
 682                         return -EINVAL;
 683         }
 684
 685         if (k->idx != -1) {
 686                 if (k->defmgmt) {
 687                         if (k->idx < 4 || k->idx > 5)
 688                                 return -EINVAL;
 689                 } else if (k->def) {
 690                         if (k->idx < 0 || k->idx > 3)
 691                                 return -EINVAL;
 692                 } else {
 693                         if (k->idx < 0 || k->idx > 5)
 694                                 return -EINVAL;
 695                 }
 696         }
 697
 698         return 0;
 699 }
 700
 701 static struct cfg80211_cached_keys *
 702 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 703                        struct nlattr *keys, bool *no_ht)
 704 {
 705         struct key_parse parse;
 706         struct nlattr *key;
 707         struct cfg80211_cached_keys *result;
 708         int rem, err, def = 0;
 709
 710         result = kzalloc(sizeof(*result), GFP_KERNEL);
 711         if (!result)
 712                 return ERR_PTR(-ENOMEM);
 713
 714         result->def = -1;
 715         result->defmgmt = -1;
 716
 717         nla_for_each_nested(key, keys, rem) {
 718                 memset(&parse, 0, sizeof(parse));
 719                 parse.idx = -1;
 720
 721                 err = nl80211_parse_key_new(key, &parse);
 722                 if (err)
 723                         goto error;
 724                 err = -EINVAL;
 725                 if (!parse.p.key)
 726                         goto error;
 727                 if (parse.idx < 0 || parse.idx > 4)
 728                         goto error;
 729                 if (parse.def) {
 730                         if (def)
 731                                 goto error;
 732                         def = 1;
 733                         result->def = parse.idx;
 734                         if (!parse.def_uni || !parse.def_multi)
 735                                 goto error;
 736                 } else if (parse.defmgmt)
 737                         goto error;
 738                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 739                                                      parse.idx, false, NULL);
 740                 if (err)
 741                         goto error;
 742                 result->params[parse.idx].cipher = parse.p.cipher;
 743                 result->params[parse.idx].key_len = parse.p.key_len;
 744                 result->params[parse.idx].key = result->data[parse.idx];
 745                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 746
 747                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 748                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 749                         if (no_ht)
 750                                 *no_ht = true;
 751                 }
 752         }
 753
 754         return result;
 755  error:
 756         kfree(result);
 757         return ERR_PTR(err);
 758 }
 759
 760 static int nl80211_key_allowed(struct wireless_dev *wdev)
 761 {
 762         ASSERT_WDEV_LOCK(wdev);
 763
 764         switch (wdev->iftype) {
 765         case NL80211_IFTYPE_AP:
 766         case NL80211_IFTYPE_AP_VLAN:
 767         case NL80211_IFTYPE_P2P_GO:
 768         case NL80211_IFTYPE_MESH_POINT:
 769                 break;
 770         case NL80211_IFTYPE_ADHOC:
 771                 if (!wdev->current_bss)
 772                         return -ENOLINK;
 773                 break;
 774         case NL80211_IFTYPE_STATION:
 775         case NL80211_IFTYPE_P2P_CLIENT:
 776                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 777                         return -ENOLINK;
 778                 break;
 779         default:
 780                 return -EINVAL;
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 787 {
 788         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 789         int i;
 790
 791         if (!nl_modes)
 792                 goto nla_put_failure;
 793
 794         i = 0;
 795         while (ifmodes) {
 796                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 797                         goto nla_put_failure;
 798                 ifmodes >>= 1;
 799                 i++;
 800         }
 801
 802         nla_nest_end(msg, nl_modes);
 803         return 0;
 804
 805 nla_put_failure:
 806         return -ENOBUFS;
 807 }
 808
 809 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 810                                           struct sk_buff *msg)
 811 {
 812         struct nlattr *nl_combis;
 813         int i, j;
 814
 815         nl_combis = nla_nest_start(msg,
 816                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 817         if (!nl_combis)
 818                 goto nla_put_failure;
 819
 820         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 821                 const struct ieee80211_iface_combination *c;
 822                 struct nlattr *nl_combi, *nl_limits;
 823
 824                 c = &wiphy->iface_combinations[i];
 825
 826                 nl_combi = nla_nest_start(msg, i + 1);
 827                 if (!nl_combi)
 828                         goto nla_put_failure;
 829
 830                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 831                 if (!nl_limits)
 832                         goto nla_put_failure;
 833
 834                 for (j = 0; j < c->n_limits; j++) {
 835                         struct nlattr *nl_limit;
 836
 837                         nl_limit = nla_nest_start(msg, j + 1);
 838                         if (!nl_limit)
 839                                 goto nla_put_failure;
 840                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 841                                         c->limits[j].max))
 842                                 goto nla_put_failure;
 843                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 844                                                 c->limits[j].types))
 845                                 goto nla_put_failure;
 846                         nla_nest_end(msg, nl_limit);
 847                 }
 848
 849                 nla_nest_end(msg, nl_limits);
 850
 851                 if (c->beacon_int_infra_match &&
 852                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 853                         goto nla_put_failure;
 854                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 855                                 c->num_different_channels) ||
 856                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 857                                 c->max_interfaces))
 858                         goto nla_put_failure;
 859
 860                 nla_nest_end(msg, nl_combi);
 861         }
 862
 863         nla_nest_end(msg, nl_combis);
 864
 865         return 0;
 866 nla_put_failure:
 867         return -ENOBUFS;
 868 }
 869
 870 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 871                               struct cfg80211_registered_device *dev)
 872 {
 873         void *hdr;
 874         struct nlattr *nl_bands, *nl_band;
 875         struct nlattr *nl_freqs, *nl_freq;
 876         struct nlattr *nl_rates, *nl_rate;
 877         struct nlattr *nl_cmds;
 878         enum ieee80211_band band;
 879         struct ieee80211_channel *chan;
 880         struct ieee80211_rate *rate;
 881         int i;
 882         const struct ieee80211_txrx_stypes *mgmt_stypes =
 883                                 dev->wiphy.mgmt_stypes;
 884
 885         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 886         if (!hdr)
 887                 return -1;
 888
 889         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 890             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 891             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 892                         cfg80211_rdev_list_generation) ||
 893             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 894                        dev->wiphy.retry_short) ||
 895             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 896                        dev->wiphy.retry_long) ||
 897             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 898                         dev->wiphy.frag_threshold) ||
 899             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 900                         dev->wiphy.rts_threshold) ||
 901             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 902                        dev->wiphy.coverage_class) ||
 903             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 904                        dev->wiphy.max_scan_ssids) ||
 905             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 906                        dev->wiphy.max_sched_scan_ssids) ||
 907             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 908                         dev->wiphy.max_scan_ie_len) ||
 909             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 910                         dev->wiphy.max_sched_scan_ie_len) ||
 911             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 912                        dev->wiphy.max_match_sets))
 913                 goto nla_put_failure;
 914
 915         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 916             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 917                 goto nla_put_failure;
 918         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 919             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 920                 goto nla_put_failure;
 921         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 922             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 923                 goto nla_put_failure;
 924         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 925             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 926                 goto nla_put_failure;
 927         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 928             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 929                 goto nla_put_failure;
 930         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 931             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 932                 goto nla_put_failure;
 933
 934         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 935                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 936                     dev->wiphy.cipher_suites))
 937                 goto nla_put_failure;
 938
 939         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 940                        dev->wiphy.max_num_pmkids))
 941                 goto nla_put_failure;
 942
 943         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 944             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 945                 goto nla_put_failure;
 946
 947         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 948                         dev->wiphy.available_antennas_tx) ||
 949             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 950                         dev->wiphy.available_antennas_rx))
 951                 goto nla_put_failure;
 952
 953         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 954             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 955                         dev->wiphy.probe_resp_offload))
 956                 goto nla_put_failure;
 957
 958         if ((dev->wiphy.available_antennas_tx ||
 959              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 960                 u32 tx_ant = 0, rx_ant = 0;
 961                 int res;
 962                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 963                 if (!res) {
 964                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 965                                         tx_ant) ||
 966                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 967                                         rx_ant))
 968                                 goto nla_put_failure;
 969                 }
 970         }
 971
 972         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 973                                 dev->wiphy.interface_modes))
 974                 goto nla_put_failure;
 975
 976         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 977         if (!nl_bands)
 978                 goto nla_put_failure;
 979
 980         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 981                 if (!dev->wiphy.bands[band])
 982                         continue;
 983
 984                 nl_band = nla_nest_start(msg, band);
 985                 if (!nl_band)
 986                         goto nla_put_failure;
 987
 988                 /* add HT info */
 989                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 990                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 991                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 992                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 993                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 994                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 995                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 996                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 997                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 998                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 999                         goto nla_put_failure;
1000
1001                 /* add VHT info */
1002                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1003                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1004                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1005                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1006                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1007                                  dev->wiphy.bands[band]->vht_cap.cap)))
1008                         goto nla_put_failure;
1009
1010                 /* add frequencies */
1011                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1012                 if (!nl_freqs)
1013                         goto nla_put_failure;
1014
1015                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1016                         nl_freq = nla_nest_start(msg, i);
1017                         if (!nl_freq)
1018                                 goto nla_put_failure;
1019
1020                         chan = &dev->wiphy.bands[band]->channels[i];
1021
1022                         if (nl80211_msg_put_channel(msg, chan))
1023                                 goto nla_put_failure;
1024
1025                         nla_nest_end(msg, nl_freq);
1026                 }
1027
1028                 nla_nest_end(msg, nl_freqs);
1029
1030                 /* add bitrates */
1031                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1032                 if (!nl_rates)
1033                         goto nla_put_failure;
1034
1035                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1036                         nl_rate = nla_nest_start(msg, i);
1037                         if (!nl_rate)
1038                                 goto nla_put_failure;
1039
1040                         rate = &dev->wiphy.bands[band]->bitrates[i];
1041                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1042                                         rate->bitrate))
1043                                 goto nla_put_failure;
1044                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1045                             nla_put_flag(msg,
1046                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1047                                 goto nla_put_failure;
1048
1049                         nla_nest_end(msg, nl_rate);
1050                 }
1051
1052                 nla_nest_end(msg, nl_rates);
1053
1054                 nla_nest_end(msg, nl_band);
1055         }
1056         nla_nest_end(msg, nl_bands);
1057
1058         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1059         if (!nl_cmds)
1060                 goto nla_put_failure;
1061
1062         i = 0;
1063 #define CMD(op, n)                                              \
1064          do {                                                   \
1065                 if (dev->ops->op) {                             \
1066                         i++;                                    \
1067                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1068                                 goto nla_put_failure;           \
1069                 }                                               \
1070         } while (0)
1071
1072         CMD(add_virtual_intf, NEW_INTERFACE);
1073         CMD(change_virtual_intf, SET_INTERFACE);
1074         CMD(add_key, NEW_KEY);
1075         CMD(start_ap, START_AP);
1076         CMD(add_station, NEW_STATION);
1077         CMD(add_mpath, NEW_MPATH);
1078         CMD(update_mesh_config, SET_MESH_CONFIG);
1079         CMD(change_bss, SET_BSS);
1080         CMD(auth, AUTHENTICATE);
1081         CMD(assoc, ASSOCIATE);
1082         CMD(deauth, DEAUTHENTICATE);
1083         CMD(disassoc, DISASSOCIATE);
1084         CMD(join_ibss, JOIN_IBSS);
1085         CMD(join_mesh, JOIN_MESH);
1086         CMD(set_pmksa, SET_PMKSA);
1087         CMD(del_pmksa, DEL_PMKSA);
1088         CMD(flush_pmksa, FLUSH_PMKSA);
1089         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1090                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1091         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1092         CMD(mgmt_tx, FRAME);
1093         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1094         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1095                 i++;
1096                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1097                         goto nla_put_failure;
1098         }
1099         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1100             dev->ops->join_mesh) {
1101                 i++;
1102                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1103                         goto nla_put_failure;
1104         }
1105         CMD(set_wds_peer, SET_WDS_PEER);
1106         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1107                 CMD(tdls_mgmt, TDLS_MGMT);
1108                 CMD(tdls_oper, TDLS_OPER);
1109         }
1110         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1111                 CMD(sched_scan_start, START_SCHED_SCAN);
1112         CMD(probe_client, PROBE_CLIENT);
1113         CMD(set_noack_map, SET_NOACK_MAP);
1114         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1115                 i++;
1116                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1117                         goto nla_put_failure;
1118         }
1119         CMD(start_p2p_device, START_P2P_DEVICE);
1120         CMD(set_mcast_rate, SET_MCAST_RATE);
1121
1122 #ifdef CONFIG_NL80211_TESTMODE
1123         CMD(testmode_cmd, TESTMODE);
1124 #endif
1125
1126 #undef CMD
1127
1128         if (dev->ops->connect || dev->ops->auth) {
1129                 i++;
1130                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1131                         goto nla_put_failure;
1132         }
1133
1134         if (dev->ops->disconnect || dev->ops->deauth) {
1135                 i++;
1136                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1137                         goto nla_put_failure;
1138         }
1139
1140         nla_nest_end(msg, nl_cmds);
1141
1142         if (dev->ops->remain_on_channel &&
1143             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1144             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1145                         dev->wiphy.max_remain_on_channel_duration))
1146                 goto nla_put_failure;
1147
1148         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1149             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1150                 goto nla_put_failure;
1151
1152         if (mgmt_stypes) {
1153                 u16 stypes;
1154                 struct nlattr *nl_ftypes, *nl_ifs;
1155                 enum nl80211_iftype ift;
1156
1157                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1158                 if (!nl_ifs)
1159                         goto nla_put_failure;
1160
1161                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1162                         nl_ftypes = nla_nest_start(msg, ift);
1163                         if (!nl_ftypes)
1164                                 goto nla_put_failure;
1165                         i = 0;
1166                         stypes = mgmt_stypes[ift].tx;
1167                         while (stypes) {
1168                                 if ((stypes & 1) &&
1169                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1170                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1171                                         goto nla_put_failure;
1172                                 stypes >>= 1;
1173                                 i++;
1174                         }
1175                         nla_nest_end(msg, nl_ftypes);
1176                 }
1177
1178                 nla_nest_end(msg, nl_ifs);
1179
1180                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1181                 if (!nl_ifs)
1182                         goto nla_put_failure;
1183
1184                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1185                         nl_ftypes = nla_nest_start(msg, ift);
1186                         if (!nl_ftypes)
1187                                 goto nla_put_failure;
1188                         i = 0;
1189                         stypes = mgmt_stypes[ift].rx;
1190                         while (stypes) {
1191                                 if ((stypes & 1) &&
1192                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1193                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1194                                         goto nla_put_failure;
1195                                 stypes >>= 1;
1196                                 i++;
1197                         }
1198                         nla_nest_end(msg, nl_ftypes);
1199                 }
1200                 nla_nest_end(msg, nl_ifs);
1201         }
1202
1203 #ifdef CONFIG_PM
1204         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1205                 struct nlattr *nl_wowlan;
1206
1207                 nl_wowlan = nla_nest_start(msg,
1208                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1209                 if (!nl_wowlan)
1210                         goto nla_put_failure;
1211
1212                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1213                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1214                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1215                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1216                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1217                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1218                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1219                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1220                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1221                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1222                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1224                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1226                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1227                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1228                     goto nla_put_failure;
1229                 if (dev->wiphy.wowlan.n_patterns) {
1230                         struct nl80211_wowlan_pattern_support pat = {
1231                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1232                                 .min_pattern_len =
1233                                         dev->wiphy.wowlan.pattern_min_len,
1234                                 .max_pattern_len =
1235                                         dev->wiphy.wowlan.pattern_max_len,
1236                         };
1237                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1238                                     sizeof(pat), &pat))
1239                                 goto nla_put_failure;
1240                 }
1241
1242                 nla_nest_end(msg, nl_wowlan);
1243         }
1244 #endif
1245
1246         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1247                                 dev->wiphy.software_iftypes))
1248                 goto nla_put_failure;
1249
1250         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1251                 goto nla_put_failure;
1252
1253         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1254             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1255                         dev->wiphy.ap_sme_capa))
1256                 goto nla_put_failure;
1257
1258         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1259                         dev->wiphy.features))
1260                 goto nla_put_failure;
1261
1262         if (dev->wiphy.ht_capa_mod_mask &&
1263             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1264                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1265                     dev->wiphy.ht_capa_mod_mask))
1266                 goto nla_put_failure;
1267
1268         return genlmsg_end(msg, hdr);
1269
1270  nla_put_failure:
1271         genlmsg_cancel(msg, hdr);
1272         return -EMSGSIZE;
1273 }
1274
1275 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1276 {
1277         int idx = 0;
1278         int start = cb->args[0];
1279         struct cfg80211_registered_device *dev;
1280
1281         mutex_lock(&cfg80211_mutex);
1282         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1283                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1284                         continue;
1285                 if (++idx <= start)
1286                         continue;
1287                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1288                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1289                                        dev) < 0) {
1290                         idx--;
1291                         break;
1292                 }
1293         }
1294         mutex_unlock(&cfg80211_mutex);
1295
1296         cb->args[0] = idx;
1297
1298         return skb->len;
1299 }
1300
1301 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1302 {
1303         struct sk_buff *msg;
1304         struct cfg80211_registered_device *dev = info->user_ptr[0];
1305
1306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1307         if (!msg)
1308                 return -ENOMEM;
1309
1310         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1311                 nlmsg_free(msg);
1312                 return -ENOBUFS;
1313         }
1314
1315         return genlmsg_reply(msg, info);
1316 }
1317
1318 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1319         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1320         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1321         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1322         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1323         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1324 };
1325
1326 static int parse_txq_params(struct nlattr *tb[],
1327                             struct ieee80211_txq_params *txq_params)
1328 {
1329         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1330             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1331             !tb[NL80211_TXQ_ATTR_AIFS])
1332                 return -EINVAL;
1333
1334         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1335         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1336         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1337         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1338         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1339
1340         if (txq_params->ac >= NL80211_NUM_ACS)
1341                 return -EINVAL;
1342
1343         return 0;
1344 }
1345
1346 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1347 {
1348         /*
1349          * You can only set the channel explicitly for WDS interfaces,
1350          * all others have their channel managed via their respective
1351          * "establish a connection" command (connect, join, ...)
1352          *
1353          * For AP/GO and mesh mode, the channel can be set with the
1354          * channel userspace API, but is only stored and passed to the
1355          * low-level driver when the AP starts or the mesh is joined.
1356          * This is for backward compatibility, userspace can also give
1357          * the channel in the start-ap or join-mesh commands instead.
1358          *
1359          * Monitors are special as they are normally slaved to
1360          * whatever else is going on, so they have their own special
1361          * operation to set the monitor channel if possible.
1362          */
1363         return !wdev ||
1364                 wdev->iftype == NL80211_IFTYPE_AP ||
1365                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1366                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1367                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1368 }
1369
1370 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1371                                  struct genl_info *info,
1372                                  struct cfg80211_chan_def *chandef)
1373 {
1374         u32 control_freq;
1375
1376         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1377                 return -EINVAL;
1378
1379         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1380
1381         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1382         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1383         chandef->center_freq1 = control_freq;
1384         chandef->center_freq2 = 0;
1385
1386         /* Primary channel not allowed */
1387         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1388                 return -EINVAL;
1389
1390         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1391                 enum nl80211_channel_type chantype;
1392
1393                 chantype = nla_get_u32(
1394                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1395
1396                 switch (chantype) {
1397                 case NL80211_CHAN_NO_HT:
1398                 case NL80211_CHAN_HT20:
1399                 case NL80211_CHAN_HT40PLUS:
1400                 case NL80211_CHAN_HT40MINUS:
1401                         cfg80211_chandef_create(chandef, chandef->chan,
1402                                                 chantype);
1403                         break;
1404                 default:
1405                         return -EINVAL;
1406                 }
1407         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1408                 chandef->width =
1409                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1410                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1411                         chandef->center_freq1 =
1412                                 nla_get_u32(
1413                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1414                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1415                         chandef->center_freq2 =
1416                                 nla_get_u32(
1417                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1418         }
1419
1420         if (!cfg80211_chandef_valid(chandef))
1421                 return -EINVAL;
1422
1423         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1424                                      IEEE80211_CHAN_DISABLED))
1425                 return -EINVAL;
1426
1427         return 0;
1428 }
1429
1430 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1431                                  struct wireless_dev *wdev,
1432                                  struct genl_info *info)
1433 {
1434         struct cfg80211_chan_def chandef;
1435         int result;
1436         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1437
1438         if (wdev)
1439                 iftype = wdev->iftype;
1440
1441         if (!nl80211_can_set_dev_channel(wdev))
1442                 return -EOPNOTSUPP;
1443
1444         result = nl80211_parse_chandef(rdev, info, &chandef);
1445         if (result)
1446                 return result;
1447
1448         mutex_lock(&rdev->devlist_mtx);
1449         switch (iftype) {
1450         case NL80211_IFTYPE_AP:
1451         case NL80211_IFTYPE_P2P_GO:
1452                 if (wdev->beacon_interval) {
1453                         result = -EBUSY;
1454                         break;
1455                 }
1456                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1457                         result = -EINVAL;
1458                         break;
1459                 }
1460                 wdev->preset_chandef = chandef;
1461                 result = 0;
1462                 break;
1463         case NL80211_IFTYPE_MESH_POINT:
1464                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1465                 break;
1466         case NL80211_IFTYPE_MONITOR:
1467                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1468                 break;
1469         default:
1470                 result = -EINVAL;
1471         }
1472         mutex_unlock(&rdev->devlist_mtx);
1473
1474         return result;
1475 }
1476
1477 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1478 {
1479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1480         struct net_device *netdev = info->user_ptr[1];
1481
1482         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1483 }
1484
1485 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1486 {
1487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1488         struct net_device *dev = info->user_ptr[1];
1489         struct wireless_dev *wdev = dev->ieee80211_ptr;
1490         const u8 *bssid;
1491
1492         if (!info->attrs[NL80211_ATTR_MAC])
1493                 return -EINVAL;
1494
1495         if (netif_running(dev))
1496                 return -EBUSY;
1497
1498         if (!rdev->ops->set_wds_peer)
1499                 return -EOPNOTSUPP;
1500
1501         if (wdev->iftype != NL80211_IFTYPE_WDS)
1502                 return -EOPNOTSUPP;
1503
1504         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1505         return rdev_set_wds_peer(rdev, dev, bssid);
1506 }
1507
1508
1509 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1510 {
1511         struct cfg80211_registered_device *rdev;
1512         struct net_device *netdev = NULL;
1513         struct wireless_dev *wdev;
1514         int result = 0, rem_txq_params = 0;
1515         struct nlattr *nl_txq_params;
1516         u32 changed;
1517         u8 retry_short = 0, retry_long = 0;
1518         u32 frag_threshold = 0, rts_threshold = 0;
1519         u8 coverage_class = 0;
1520
1521         /*
1522          * Try to find the wiphy and netdev. Normally this
1523          * function shouldn't need the netdev, but this is
1524          * done for backward compatibility -- previously
1525          * setting the channel was done per wiphy, but now
1526          * it is per netdev. Previous userland like hostapd
1527          * also passed a netdev to set_wiphy, so that it is
1528          * possible to let that go to the right netdev!
1529          */
1530         mutex_lock(&cfg80211_mutex);
1531
1532         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1533                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1534
1535                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1536                 if (netdev && netdev->ieee80211_ptr) {
1537                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1538                         mutex_lock(&rdev->mtx);
1539                 } else
1540                         netdev = NULL;
1541         }
1542
1543         if (!netdev) {
1544                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1545                                                   info->attrs);
1546                 if (IS_ERR(rdev)) {
1547                         mutex_unlock(&cfg80211_mutex);
1548                         return PTR_ERR(rdev);
1549                 }
1550                 wdev = NULL;
1551                 netdev = NULL;
1552                 result = 0;
1553
1554                 mutex_lock(&rdev->mtx);
1555         } else
1556                 wdev = netdev->ieee80211_ptr;
1557
1558         /*
1559          * end workaround code, by now the rdev is available
1560          * and locked, and wdev may or may not be NULL.
1561          */
1562
1563         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1564                 result = cfg80211_dev_rename(
1565                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1566
1567         mutex_unlock(&cfg80211_mutex);
1568
1569         if (result)
1570                 goto bad_res;
1571
1572         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1573                 struct ieee80211_txq_params txq_params;
1574                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1575
1576                 if (!rdev->ops->set_txq_params) {
1577                         result = -EOPNOTSUPP;
1578                         goto bad_res;
1579                 }
1580
1581                 if (!netdev) {
1582                         result = -EINVAL;
1583                         goto bad_res;
1584                 }
1585
1586                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1587                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1588                         result = -EINVAL;
1589                         goto bad_res;
1590                 }
1591
1592                 if (!netif_running(netdev)) {
1593                         result = -ENETDOWN;
1594                         goto bad_res;
1595                 }
1596
1597                 nla_for_each_nested(nl_txq_params,
1598                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1599                                     rem_txq_params) {
1600                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1601                                   nla_data(nl_txq_params),
1602                                   nla_len(nl_txq_params),
1603                                   txq_params_policy);
1604                         result = parse_txq_params(tb, &txq_params);
1605                         if (result)
1606                                 goto bad_res;
1607
1608                         result = rdev_set_txq_params(rdev, netdev,
1609                                                      &txq_params);
1610                         if (result)
1611                                 goto bad_res;
1612                 }
1613         }
1614
1615         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1616                 result = __nl80211_set_channel(rdev,
1617                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1618                                 info);
1619                 if (result)
1620                         goto bad_res;
1621         }
1622
1623         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1624                 struct wireless_dev *txp_wdev = wdev;
1625                 enum nl80211_tx_power_setting type;
1626                 int idx, mbm = 0;
1627
1628                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1629                         txp_wdev = NULL;
1630
1631                 if (!rdev->ops->set_tx_power) {
1632                         result = -EOPNOTSUPP;
1633                         goto bad_res;
1634                 }
1635
1636                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1637                 type = nla_get_u32(info->attrs[idx]);
1638
1639                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1640                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1641                         result = -EINVAL;
1642                         goto bad_res;
1643                 }
1644
1645                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1646                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1647                         mbm = nla_get_u32(info->attrs[idx]);
1648                 }
1649
1650                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1651                 if (result)
1652                         goto bad_res;
1653         }
1654
1655         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1656             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1657                 u32 tx_ant, rx_ant;
1658                 if ((!rdev->wiphy.available_antennas_tx &&
1659                      !rdev->wiphy.available_antennas_rx) ||
1660                     !rdev->ops->set_antenna) {
1661                         result = -EOPNOTSUPP;
1662                         goto bad_res;
1663                 }
1664
1665                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1666                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1667
1668                 /* reject antenna configurations which don't match the
1669                  * available antenna masks, except for the "all" mask */
1670                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1671                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1672                         result = -EINVAL;
1673                         goto bad_res;
1674                 }
1675
1676                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1677                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1678
1679                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1680                 if (result)
1681                         goto bad_res;
1682         }
1683
1684         changed = 0;
1685
1686         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1687                 retry_short = nla_get_u8(
1688                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1689                 if (retry_short == 0) {
1690                         result = -EINVAL;
1691                         goto bad_res;
1692                 }
1693                 changed |= WIPHY_PARAM_RETRY_SHORT;
1694         }
1695
1696         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1697                 retry_long = nla_get_u8(
1698                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1699                 if (retry_long == 0) {
1700                         result = -EINVAL;
1701                         goto bad_res;
1702                 }
1703                 changed |= WIPHY_PARAM_RETRY_LONG;
1704         }
1705
1706         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1707                 frag_threshold = nla_get_u32(
1708                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1709                 if (frag_threshold < 256) {
1710                         result = -EINVAL;
1711                         goto bad_res;
1712                 }
1713                 if (frag_threshold != (u32) -1) {
1714                         /*
1715                          * Fragments (apart from the last one) are required to
1716                          * have even length. Make the fragmentation code
1717                          * simpler by stripping LSB should someone try to use
1718                          * odd threshold value.
1719                          */
1720                         frag_threshold &= ~0x1;
1721                 }
1722                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1723         }
1724
1725         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1726                 rts_threshold = nla_get_u32(
1727                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1728                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1729         }
1730
1731         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1732                 coverage_class = nla_get_u8(
1733                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1734                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1735         }
1736
1737         if (changed) {
1738                 u8 old_retry_short, old_retry_long;
1739                 u32 old_frag_threshold, old_rts_threshold;
1740                 u8 old_coverage_class;
1741
1742                 if (!rdev->ops->set_wiphy_params) {
1743                         result = -EOPNOTSUPP;
1744                         goto bad_res;
1745                 }
1746
1747                 old_retry_short = rdev->wiphy.retry_short;
1748                 old_retry_long = rdev->wiphy.retry_long;
1749                 old_frag_threshold = rdev->wiphy.frag_threshold;
1750                 old_rts_threshold = rdev->wiphy.rts_threshold;
1751                 old_coverage_class = rdev->wiphy.coverage_class;
1752
1753                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1754                         rdev->wiphy.retry_short = retry_short;
1755                 if (changed & WIPHY_PARAM_RETRY_LONG)
1756                         rdev->wiphy.retry_long = retry_long;
1757                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1758                         rdev->wiphy.frag_threshold = frag_threshold;
1759                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1760                         rdev->wiphy.rts_threshold = rts_threshold;
1761                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1762                         rdev->wiphy.coverage_class = coverage_class;
1763
1764                 result = rdev_set_wiphy_params(rdev, changed);
1765                 if (result) {
1766                         rdev->wiphy.retry_short = old_retry_short;
1767                         rdev->wiphy.retry_long = old_retry_long;
1768                         rdev->wiphy.frag_threshold = old_frag_threshold;
1769                         rdev->wiphy.rts_threshold = old_rts_threshold;
1770                         rdev->wiphy.coverage_class = old_coverage_class;
1771                 }
1772         }
1773
1774  bad_res:
1775         mutex_unlock(&rdev->mtx);
1776         if (netdev)
1777                 dev_put(netdev);
1778         return result;
1779 }
1780
1781 static inline u64 wdev_id(struct wireless_dev *wdev)
1782 {
1783         return (u64)wdev->identifier |
1784                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1785 }
1786
1787 static int nl80211_send_chandef(struct sk_buff *msg,
1788                                  struct cfg80211_chan_def *chandef)
1789 {
1790         WARN_ON(!cfg80211_chandef_valid(chandef));
1791
1792         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1793                         chandef->chan->center_freq))
1794                 return -ENOBUFS;
1795         switch (chandef->width) {
1796         case NL80211_CHAN_WIDTH_20_NOHT:
1797         case NL80211_CHAN_WIDTH_20:
1798         case NL80211_CHAN_WIDTH_40:
1799                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1800                                 cfg80211_get_chandef_type(chandef)))
1801                         return -ENOBUFS;
1802                 break;
1803         default:
1804                 break;
1805         }
1806         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1807                 return -ENOBUFS;
1808         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1809                 return -ENOBUFS;
1810         if (chandef->center_freq2 &&
1811             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1812                 return -ENOBUFS;
1813         return 0;
1814 }
1815
1816 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1817                               struct cfg80211_registered_device *rdev,
1818                               struct wireless_dev *wdev)
1819 {
1820         struct net_device *dev = wdev->netdev;
1821         void *hdr;
1822
1823         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1824         if (!hdr)
1825                 return -1;
1826
1827         if (dev &&
1828             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1829              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1830                 goto nla_put_failure;
1831
1832         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1833             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1834             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1835             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1836             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1837                         rdev->devlist_generation ^
1838                         (cfg80211_rdev_list_generation << 2)))
1839                 goto nla_put_failure;
1840
1841         if (rdev->ops->get_channel) {
1842                 int ret;
1843                 struct cfg80211_chan_def chandef;
1844
1845                 ret = rdev_get_channel(rdev, wdev, &chandef);
1846                 if (ret == 0) {
1847                         if (nl80211_send_chandef(msg, &chandef))
1848                                 goto nla_put_failure;
1849                 }
1850         }
1851
1852         if (wdev->ssid_len) {
1853                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1854                         goto nla_put_failure;
1855         }
1856
1857         return genlmsg_end(msg, hdr);
1858
1859  nla_put_failure:
1860         genlmsg_cancel(msg, hdr);
1861         return -EMSGSIZE;
1862 }
1863
1864 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1865 {
1866         int wp_idx = 0;
1867         int if_idx = 0;
1868         int wp_start = cb->args[0];
1869         int if_start = cb->args[1];
1870         struct cfg80211_registered_device *rdev;
1871         struct wireless_dev *wdev;
1872
1873         mutex_lock(&cfg80211_mutex);
1874         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1875                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1876                         continue;
1877                 if (wp_idx < wp_start) {
1878                         wp_idx++;
1879                         continue;
1880                 }
1881                 if_idx = 0;
1882
1883                 mutex_lock(&rdev->devlist_mtx);
1884                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1885                         if (if_idx < if_start) {
1886                                 if_idx++;
1887                                 continue;
1888                         }
1889                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1890                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1891                                                rdev, wdev) < 0) {
1892                                 mutex_unlock(&rdev->devlist_mtx);
1893                                 goto out;
1894                         }
1895                         if_idx++;
1896                 }
1897                 mutex_unlock(&rdev->devlist_mtx);
1898
1899                 wp_idx++;
1900         }
1901  out:
1902         mutex_unlock(&cfg80211_mutex);
1903
1904         cb->args[0] = wp_idx;
1905         cb->args[1] = if_idx;
1906
1907         return skb->len;
1908 }
1909
1910 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1911 {
1912         struct sk_buff *msg;
1913         struct cfg80211_registered_device *dev = info->user_ptr[0];
1914         struct wireless_dev *wdev = info->user_ptr[1];
1915
1916         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1917         if (!msg)
1918                 return -ENOMEM;
1919
1920         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1921                                dev, wdev) < 0) {
1922                 nlmsg_free(msg);
1923                 return -ENOBUFS;
1924         }
1925
1926         return genlmsg_reply(msg, info);
1927 }
1928
1929 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1930         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1931         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1932         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1933         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1934         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1935 };
1936
1937 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1938 {
1939         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1940         int flag;
1941
1942         *mntrflags = 0;
1943
1944         if (!nla)
1945                 return -EINVAL;
1946
1947         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1948                              nla, mntr_flags_policy))
1949                 return -EINVAL;
1950
1951         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1952                 if (flags[flag])
1953                         *mntrflags |= (1<<flag);
1954
1955         return 0;
1956 }
1957
1958 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1959                                struct net_device *netdev, u8 use_4addr,
1960                                enum nl80211_iftype iftype)
1961 {
1962         if (!use_4addr) {
1963                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1964                         return -EBUSY;
1965                 return 0;
1966         }
1967
1968         switch (iftype) {
1969         case NL80211_IFTYPE_AP_VLAN:
1970                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1971                         return 0;
1972                 break;
1973         case NL80211_IFTYPE_STATION:
1974                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1975                         return 0;
1976                 break;
1977         default:
1978                 break;
1979         }
1980
1981         return -EOPNOTSUPP;
1982 }
1983
1984 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1985 {
1986         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1987         struct vif_params params;
1988         int err;
1989         enum nl80211_iftype otype, ntype;
1990         struct net_device *dev = info->user_ptr[1];
1991         u32 _flags, *flags = NULL;
1992         bool change = false;
1993
1994         memset(&params, 0, sizeof(params));
1995
1996         otype = ntype = dev->ieee80211_ptr->iftype;
1997
1998         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1999                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2000                 if (otype != ntype)
2001                         change = true;
2002                 if (ntype > NL80211_IFTYPE_MAX)
2003                         return -EINVAL;
2004         }
2005
2006         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2007                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2008
2009                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2010                         return -EINVAL;
2011                 if (netif_running(dev))
2012                         return -EBUSY;
2013
2014                 wdev_lock(wdev);
2015                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2016                              IEEE80211_MAX_MESH_ID_LEN);
2017                 wdev->mesh_id_up_len =
2018                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2019                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2020                        wdev->mesh_id_up_len);
2021                 wdev_unlock(wdev);
2022         }
2023
2024         if (info->attrs[NL80211_ATTR_4ADDR]) {
2025                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2026                 change = true;
2027                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2028                 if (err)
2029                         return err;
2030         } else {
2031                 params.use_4addr = -1;
2032         }
2033
2034         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2035                 if (ntype != NL80211_IFTYPE_MONITOR)
2036                         return -EINVAL;
2037                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2038                                           &_flags);
2039                 if (err)
2040                         return err;
2041
2042                 flags = &_flags;
2043                 change = true;
2044         }
2045
2046         if (change)
2047                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2048         else
2049                 err = 0;
2050
2051         if (!err && params.use_4addr != -1)
2052                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2053
2054         return err;
2055 }
2056
2057 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2058 {
2059         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2060         struct vif_params params;
2061         struct wireless_dev *wdev;
2062         struct sk_buff *msg;
2063         int err;
2064         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2065         u32 flags;
2066
2067         memset(&params, 0, sizeof(params));
2068
2069         if (!info->attrs[NL80211_ATTR_IFNAME])
2070                 return -EINVAL;
2071
2072         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2073                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2074                 if (type > NL80211_IFTYPE_MAX)
2075                         return -EINVAL;
2076         }
2077
2078         if (!rdev->ops->add_virtual_intf ||
2079             !(rdev->wiphy.interface_modes & (1 << type)))
2080                 return -EOPNOTSUPP;
2081
2082         if (info->attrs[NL80211_ATTR_4ADDR]) {
2083                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2084                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2085                 if (err)
2086                         return err;
2087         }
2088
2089         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2090         if (!msg)
2091                 return -ENOMEM;
2092
2093         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2094                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2095                                   &flags);
2096         wdev = rdev_add_virtual_intf(rdev,
2097                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2098                                 type, err ? NULL : &flags, &params);
2099         if (IS_ERR(wdev)) {
2100                 nlmsg_free(msg);
2101                 return PTR_ERR(wdev);
2102         }
2103
2104         switch (type) {
2105         case NL80211_IFTYPE_MESH_POINT:
2106                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2107                         break;
2108                 wdev_lock(wdev);
2109                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2110                              IEEE80211_MAX_MESH_ID_LEN);
2111                 wdev->mesh_id_up_len =
2112                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2113                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2114                        wdev->mesh_id_up_len);
2115                 wdev_unlock(wdev);
2116                 break;
2117         case NL80211_IFTYPE_P2P_DEVICE:
2118                 /*
2119                  * P2P Device doesn't have a netdev, so doesn't go
2120                  * through the netdev notifier and must be added here
2121                  */
2122                 mutex_init(&wdev->mtx);
2123                 INIT_LIST_HEAD(&wdev->event_list);
2124                 spin_lock_init(&wdev->event_lock);
2125                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2126                 spin_lock_init(&wdev->mgmt_registrations_lock);
2127
2128                 mutex_lock(&rdev->devlist_mtx);
2129                 wdev->identifier = ++rdev->wdev_id;
2130                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2131                 rdev->devlist_generation++;
2132                 mutex_unlock(&rdev->devlist_mtx);
2133                 break;
2134         default:
2135                 break;
2136         }
2137
2138         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2139                                rdev, wdev) < 0) {
2140                 nlmsg_free(msg);
2141                 return -ENOBUFS;
2142         }
2143
2144         return genlmsg_reply(msg, info);
2145 }
2146
2147 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2148 {
2149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2150         struct wireless_dev *wdev = info->user_ptr[1];
2151
2152         if (!rdev->ops->del_virtual_intf)
2153                 return -EOPNOTSUPP;
2154
2155         /*
2156          * If we remove a wireless device without a netdev then clear
2157          * user_ptr[1] so that nl80211_post_doit won't dereference it
2158          * to check if it needs to do dev_put(). Otherwise it crashes
2159          * since the wdev has been freed, unlike with a netdev where
2160          * we need the dev_put() for the netdev to really be freed.
2161          */
2162         if (!wdev->netdev)
2163                 info->user_ptr[1] = NULL;
2164
2165         return rdev_del_virtual_intf(rdev, wdev);
2166 }
2167
2168 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2169 {
2170         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2171         struct net_device *dev = info->user_ptr[1];
2172         u16 noack_map;
2173
2174         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2175                 return -EINVAL;
2176
2177         if (!rdev->ops->set_noack_map)
2178                 return -EOPNOTSUPP;
2179
2180         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2181
2182         return rdev_set_noack_map(rdev, dev, noack_map);
2183 }
2184
2185 struct get_key_cookie {
2186         struct sk_buff *msg;
2187         int error;
2188         int idx;
2189 };
2190
2191 static void get_key_callback(void *c, struct key_params *params)
2192 {
2193         struct nlattr *key;
2194         struct get_key_cookie *cookie = c;
2195
2196         if ((params->key &&
2197              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2198                      params->key_len, params->key)) ||
2199             (params->seq &&
2200              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2201                      params->seq_len, params->seq)) ||
2202             (params->cipher &&
2203              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2204                          params->cipher)))
2205                 goto nla_put_failure;
2206
2207         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2208         if (!key)
2209                 goto nla_put_failure;
2210
2211         if ((params->key &&
2212              nla_put(cookie->msg, NL80211_KEY_DATA,
2213                      params->key_len, params->key)) ||
2214             (params->seq &&
2215              nla_put(cookie->msg, NL80211_KEY_SEQ,
2216                      params->seq_len, params->seq)) ||
2217             (params->cipher &&
2218              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2219                          params->cipher)))
2220                 goto nla_put_failure;
2221
2222         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2223                 goto nla_put_failure;
2224
2225         nla_nest_end(cookie->msg, key);
2226
2227         return;
2228  nla_put_failure:
2229         cookie->error = 1;
2230 }
2231
2232 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2233 {
2234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2235         int err;
2236         struct net_device *dev = info->user_ptr[1];
2237         u8 key_idx = 0;
2238         const u8 *mac_addr = NULL;
2239         bool pairwise;
2240         struct get_key_cookie cookie = {
2241                 .error = 0,
2242         };
2243         void *hdr;
2244         struct sk_buff *msg;
2245
2246         if (info->attrs[NL80211_ATTR_KEY_IDX])
2247                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2248
2249         if (key_idx > 5)
2250                 return -EINVAL;
2251
2252         if (info->attrs[NL80211_ATTR_MAC])
2253                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2254
2255         pairwise = !!mac_addr;
2256         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2257                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2258                 if (kt >= NUM_NL80211_KEYTYPES)
2259                         return -EINVAL;
2260                 if (kt != NL80211_KEYTYPE_GROUP &&
2261                     kt != NL80211_KEYTYPE_PAIRWISE)
2262                         return -EINVAL;
2263                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2264         }
2265
2266         if (!rdev->ops->get_key)
2267                 return -EOPNOTSUPP;
2268
2269         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2270         if (!msg)
2271                 return -ENOMEM;
2272
2273         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2274                              NL80211_CMD_NEW_KEY);
2275         if (IS_ERR(hdr))
2276                 return PTR_ERR(hdr);
2277
2278         cookie.msg = msg;
2279         cookie.idx = key_idx;
2280
2281         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2282             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2283                 goto nla_put_failure;
2284         if (mac_addr &&
2285             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2286                 goto nla_put_failure;
2287
2288         if (pairwise && mac_addr &&
2289             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2290                 return -ENOENT;
2291
2292         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2293                            get_key_callback);
2294
2295         if (err)
2296                 goto free_msg;
2297
2298         if (cookie.error)
2299                 goto nla_put_failure;
2300
2301         genlmsg_end(msg, hdr);
2302         return genlmsg_reply(msg, info);
2303
2304  nla_put_failure:
2305         err = -ENOBUFS;
2306  free_msg:
2307         nlmsg_free(msg);
2308         return err;
2309 }
2310
2311 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2312 {
2313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2314         struct key_parse key;
2315         int err;
2316         struct net_device *dev = info->user_ptr[1];
2317
2318         err = nl80211_parse_key(info, &key);
2319         if (err)
2320                 return err;
2321
2322         if (key.idx < 0)
2323                 return -EINVAL;
2324
2325         /* only support setting default key */
2326         if (!key.def && !key.defmgmt)
2327                 return -EINVAL;
2328
2329         wdev_lock(dev->ieee80211_ptr);
2330
2331         if (key.def) {
2332                 if (!rdev->ops->set_default_key) {
2333                         err = -EOPNOTSUPP;
2334                         goto out;
2335                 }
2336
2337                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2338                 if (err)
2339                         goto out;
2340
2341                 err = rdev_set_default_key(rdev, dev, key.idx,
2342                                                  key.def_uni, key.def_multi);
2343
2344                 if (err)
2345                         goto out;
2346
2347 #ifdef CONFIG_CFG80211_WEXT
2348                 dev->ieee80211_ptr->wext.default_key = key.idx;
2349 #endif
2350         } else {
2351                 if (key.def_uni || !key.def_multi) {
2352                         err = -EINVAL;
2353                         goto out;
2354                 }
2355
2356                 if (!rdev->ops->set_default_mgmt_key) {
2357                         err = -EOPNOTSUPP;
2358                         goto out;
2359                 }
2360
2361                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2362                 if (err)
2363                         goto out;
2364
2365                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2366                 if (err)
2367                         goto out;
2368
2369 #ifdef CONFIG_CFG80211_WEXT
2370                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2371 #endif
2372         }
2373
2374  out:
2375         wdev_unlock(dev->ieee80211_ptr);
2376
2377         return err;
2378 }
2379
2380 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2381 {
2382         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2383         int err;
2384         struct net_device *dev = info->user_ptr[1];
2385         struct key_parse key;
2386         const u8 *mac_addr = NULL;
2387
2388         err = nl80211_parse_key(info, &key);
2389         if (err)
2390                 return err;
2391
2392         if (!key.p.key)
2393                 return -EINVAL;
2394
2395         if (info->attrs[NL80211_ATTR_MAC])
2396                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2397
2398         if (key.type == -1) {
2399                 if (mac_addr)
2400                         key.type = NL80211_KEYTYPE_PAIRWISE;
2401                 else
2402                         key.type = NL80211_KEYTYPE_GROUP;
2403         }
2404
2405         /* for now */
2406         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2407             key.type != NL80211_KEYTYPE_GROUP)
2408                 return -EINVAL;
2409
2410         if (!rdev->ops->add_key)
2411                 return -EOPNOTSUPP;
2412
2413         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2414                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2415                                            mac_addr))
2416                 return -EINVAL;
2417
2418         wdev_lock(dev->ieee80211_ptr);
2419         err = nl80211_key_allowed(dev->ieee80211_ptr);
2420         if (!err)
2421                 err = rdev_add_key(rdev, dev, key.idx,
2422                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2423                                     mac_addr, &key.p);
2424         wdev_unlock(dev->ieee80211_ptr);
2425
2426         return err;
2427 }
2428
2429 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2430 {
2431         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2432         int err;
2433         struct net_device *dev = info->user_ptr[1];
2434         u8 *mac_addr = NULL;
2435         struct key_parse key;
2436
2437         err = nl80211_parse_key(info, &key);
2438         if (err)
2439                 return err;
2440
2441         if (info->attrs[NL80211_ATTR_MAC])
2442                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2443
2444         if (key.type == -1) {
2445                 if (mac_addr)
2446                         key.type = NL80211_KEYTYPE_PAIRWISE;
2447                 else
2448                         key.type = NL80211_KEYTYPE_GROUP;
2449         }
2450
2451         /* for now */
2452         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2453             key.type != NL80211_KEYTYPE_GROUP)
2454                 return -EINVAL;
2455
2456         if (!rdev->ops->del_key)
2457                 return -EOPNOTSUPP;
2458
2459         wdev_lock(dev->ieee80211_ptr);
2460         err = nl80211_key_allowed(dev->ieee80211_ptr);
2461
2462         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2463             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2464                 err = -ENOENT;
2465
2466         if (!err)
2467                 err = rdev_del_key(rdev, dev, key.idx,
2468                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2469                                    mac_addr);
2470
2471 #ifdef CONFIG_CFG80211_WEXT
2472         if (!err) {
2473                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2474                         dev->ieee80211_ptr->wext.default_key = -1;
2475                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2476                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2477         }
2478 #endif
2479         wdev_unlock(dev->ieee80211_ptr);
2480
2481         return err;
2482 }
2483
2484 static int nl80211_parse_beacon(struct genl_info *info,
2485                                 struct cfg80211_beacon_data *bcn)
2486 {
2487         bool haveinfo = false;
2488
2489         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2490             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2491             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2492             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2493                 return -EINVAL;
2494
2495         memset(bcn, 0, sizeof(*bcn));
2496
2497         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2498                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2499                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2500                 if (!bcn->head_len)
2501                         return -EINVAL;
2502                 haveinfo = true;
2503         }
2504
2505         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2506                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2507                 bcn->tail_len =
2508                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2509                 haveinfo = true;
2510         }
2511
2512         if (!haveinfo)
2513                 return -EINVAL;
2514
2515         if (info->attrs[NL80211_ATTR_IE]) {
2516                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2517                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2518         }
2519
2520         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2521                 bcn->proberesp_ies =
2522                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2523                 bcn->proberesp_ies_len =
2524                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2525         }
2526
2527         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2528                 bcn->assocresp_ies =
2529                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2530                 bcn->assocresp_ies_len =
2531                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2532         }
2533
2534         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2535                 bcn->probe_resp =
2536                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2537                 bcn->probe_resp_len =
2538                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2539         }
2540
2541         return 0;
2542 }
2543
2544 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2545                                    struct cfg80211_ap_settings *params)
2546 {
2547         struct wireless_dev *wdev;
2548         bool ret = false;
2549
2550         mutex_lock(&rdev->devlist_mtx);
2551
2552         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2553                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2554                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2555                         continue;
2556
2557                 if (!wdev->preset_chandef.chan)
2558                         continue;
2559
2560                 params->chandef = wdev->preset_chandef;
2561                 ret = true;
2562                 break;
2563         }
2564
2565         mutex_unlock(&rdev->devlist_mtx);
2566
2567         return ret;
2568 }
2569
2570 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2571                                     enum nl80211_auth_type auth_type,
2572                                     enum nl80211_commands cmd)
2573 {
2574         if (auth_type > NL80211_AUTHTYPE_MAX)
2575                 return false;
2576
2577         switch (cmd) {
2578         case NL80211_CMD_AUTHENTICATE:
2579                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2580                     auth_type == NL80211_AUTHTYPE_SAE)
2581                         return false;
2582                 return true;
2583         case NL80211_CMD_CONNECT:
2584         case NL80211_CMD_START_AP:
2585                 /* SAE not supported yet */
2586                 if (auth_type == NL80211_AUTHTYPE_SAE)
2587                         return false;
2588                 return true;
2589         default:
2590                 return false;
2591         }
2592 }
2593
2594 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2595 {
2596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2597         struct net_device *dev = info->user_ptr[1];
2598         struct wireless_dev *wdev = dev->ieee80211_ptr;
2599         struct cfg80211_ap_settings params;
2600         int err;
2601
2602         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2603             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2604                 return -EOPNOTSUPP;
2605
2606         if (!rdev->ops->start_ap)
2607                 return -EOPNOTSUPP;
2608
2609         if (wdev->beacon_interval)
2610                 return -EALREADY;
2611
2612         memset(&params, 0, sizeof(params));
2613
2614         /* these are required for START_AP */
2615         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2616             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2617             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2618                 return -EINVAL;
2619
2620         err = nl80211_parse_beacon(info, &params.beacon);
2621         if (err)
2622                 return err;
2623
2624         params.beacon_interval =
2625                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2626         params.dtim_period =
2627                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2628
2629         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2630         if (err)
2631                 return err;
2632
2633         /*
2634          * In theory, some of these attributes should be required here
2635          * but since they were not used when the command was originally
2636          * added, keep them optional for old user space programs to let
2637          * them continue to work with drivers that do not need the
2638          * additional information -- drivers must check!
2639          */
2640         if (info->attrs[NL80211_ATTR_SSID]) {
2641                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2642                 params.ssid_len =
2643                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2644                 if (params.ssid_len == 0 ||
2645                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2646                         return -EINVAL;
2647         }
2648
2649         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2650                 params.hidden_ssid = nla_get_u32(
2651                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2652                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2653                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2654                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2655                         return -EINVAL;
2656         }
2657
2658         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2659
2660         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2661                 params.auth_type = nla_get_u32(
2662                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2663                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2664                                              NL80211_CMD_START_AP))
2665                         return -EINVAL;
2666         } else
2667                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2668
2669         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2670                                       NL80211_MAX_NR_CIPHER_SUITES);
2671         if (err)
2672                 return err;
2673
2674         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2675                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2676                         return -EOPNOTSUPP;
2677                 params.inactivity_timeout = nla_get_u16(
2678                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2679         }
2680
2681         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
2682                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2683                         return -EINVAL;
2684                 params.p2p_ctwindow =
2685                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
2686                 if (params.p2p_ctwindow > 127)
2687                         return -EINVAL;
2688                 if (params.p2p_ctwindow != 0 &&
2689                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
2690                         return -EINVAL;
2691         }
2692
2693         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
2694                 u8 tmp;
2695
2696                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2697                         return -EINVAL;
2698                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
2699                 if (tmp > 1)
2700                         return -EINVAL;
2701                 params.p2p_opp_ps = tmp;
2702                 if (params.p2p_opp_ps != 0 &&
2703                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
2704                         return -EINVAL;
2705         }
2706
2707         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2708                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2709                 if (err)
2710                         return err;
2711         } else if (wdev->preset_chandef.chan) {
2712                 params.chandef = wdev->preset_chandef;
2713         } else if (!nl80211_get_ap_channel(rdev, &params))
2714                 return -EINVAL;
2715
2716         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2717                 return -EINVAL;
2718
2719         mutex_lock(&rdev->devlist_mtx);
2720         err = cfg80211_can_use_chan(rdev, wdev, params.chandef.chan,
2721                                     CHAN_MODE_SHARED);
2722         mutex_unlock(&rdev->devlist_mtx);
2723
2724         if (err)
2725                 return err;
2726
2727         err = rdev_start_ap(rdev, dev, &params);
2728         if (!err) {
2729                 wdev->preset_chandef = params.chandef;
2730                 wdev->beacon_interval = params.beacon_interval;
2731                 wdev->channel = params.chandef.chan;
2732                 wdev->ssid_len = params.ssid_len;
2733                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2734         }
2735         return err;
2736 }
2737
2738 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2739 {
2740         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2741         struct net_device *dev = info->user_ptr[1];
2742         struct wireless_dev *wdev = dev->ieee80211_ptr;
2743         struct cfg80211_beacon_data params;
2744         int err;
2745
2746         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2747             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2748                 return -EOPNOTSUPP;
2749
2750         if (!rdev->ops->change_beacon)
2751                 return -EOPNOTSUPP;
2752
2753         if (!wdev->beacon_interval)
2754                 return -EINVAL;
2755
2756         err = nl80211_parse_beacon(info, &params);
2757         if (err)
2758                 return err;
2759
2760         return rdev_change_beacon(rdev, dev, &params);
2761 }
2762
2763 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2764 {
2765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2766         struct net_device *dev = info->user_ptr[1];
2767
2768         return cfg80211_stop_ap(rdev, dev);
2769 }
2770
2771 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2772         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2773         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2774         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2775         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2776         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2777         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2778 };
2779
2780 static int parse_station_flags(struct genl_info *info,
2781                                enum nl80211_iftype iftype,
2782                                struct station_parameters *params)
2783 {
2784         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2785         struct nlattr *nla;
2786         int flag;
2787
2788         /*
2789          * Try parsing the new attribute first so userspace
2790          * can specify both for older kernels.
2791          */
2792         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2793         if (nla) {
2794                 struct nl80211_sta_flag_update *sta_flags;
2795
2796                 sta_flags = nla_data(nla);
2797                 params->sta_flags_mask = sta_flags->mask;
2798                 params->sta_flags_set = sta_flags->set;
2799                 if ((params->sta_flags_mask |
2800                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2801                         return -EINVAL;
2802                 return 0;
2803         }
2804
2805         /* if present, parse the old attribute */
2806
2807         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2808         if (!nla)
2809                 return 0;
2810
2811         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2812                              nla, sta_flags_policy))
2813                 return -EINVAL;
2814
2815         /*
2816          * Only allow certain flags for interface types so that
2817          * other attributes are silently ignored. Remember that
2818          * this is backward compatibility code with old userspace
2819          * and shouldn't be hit in other cases anyway.
2820          */
2821         switch (iftype) {
2822         case NL80211_IFTYPE_AP:
2823         case NL80211_IFTYPE_AP_VLAN:
2824         case NL80211_IFTYPE_P2P_GO:
2825                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2826                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2827                                          BIT(NL80211_STA_FLAG_WME) |
2828                                          BIT(NL80211_STA_FLAG_MFP);
2829                 break;
2830         case NL80211_IFTYPE_P2P_CLIENT:
2831         case NL80211_IFTYPE_STATION:
2832                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2833                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2834                 break;
2835         case NL80211_IFTYPE_MESH_POINT:
2836                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2837                                          BIT(NL80211_STA_FLAG_MFP) |
2838                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2839         default:
2840                 return -EINVAL;
2841         }
2842
2843         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2844                 if (flags[flag]) {
2845                         params->sta_flags_set |= (1<<flag);
2846
2847                         /* no longer support new API additions in old API */
2848                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2849                                 return -EINVAL;
2850                 }
2851         }
2852
2853         return 0;
2854 }
2855
2856 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2857                                  int attr)
2858 {
2859         struct nlattr *rate;
2860         u32 bitrate;
2861         u16 bitrate_compat;
2862
2863         rate = nla_nest_start(msg, attr);
2864         if (!rate)
2865                 return false;
2866
2867         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2868         bitrate = cfg80211_calculate_bitrate(info);
2869         /* report 16-bit bitrate only if we can */
2870         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2871         if (bitrate > 0 &&
2872             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
2873                 return false;
2874         if (bitrate_compat > 0 &&
2875             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
2876                 return false;
2877
2878         if (info->flags & RATE_INFO_FLAGS_MCS) {
2879                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
2880                         return false;
2881                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2882                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2883                         return false;
2884                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2885                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2886                         return false;
2887         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
2888                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
2889                         return false;
2890                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
2891                         return false;
2892                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2893                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2894                         return false;
2895                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
2896                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
2897                         return false;
2898                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
2899                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
2900                         return false;
2901                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
2902                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
2903                         return false;
2904                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2905                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2906                         return false;
2907         }
2908
2909         nla_nest_end(msg, rate);
2910         return true;
2911 }
2912
2913 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
2914                                 int flags,
2915                                 struct cfg80211_registered_device *rdev,
2916                                 struct net_device *dev,
2917                                 const u8 *mac_addr, struct station_info *sinfo)
2918 {
2919         void *hdr;
2920         struct nlattr *sinfoattr, *bss_param;
2921
2922         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
2923         if (!hdr)
2924                 return -1;
2925
2926         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2927             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2928             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2929                 goto nla_put_failure;
2930
2931         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2932         if (!sinfoattr)
2933                 goto nla_put_failure;
2934         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2935             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2936                         sinfo->connected_time))
2937                 goto nla_put_failure;
2938         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2939             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2940                         sinfo->inactive_time))
2941                 goto nla_put_failure;
2942         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2943             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2944                         sinfo->rx_bytes))
2945                 goto nla_put_failure;
2946         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2947             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2948                         sinfo->tx_bytes))
2949                 goto nla_put_failure;
2950         if ((sinfo->filled & STATION_INFO_LLID) &&
2951             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2952                 goto nla_put_failure;
2953         if ((sinfo->filled & STATION_INFO_PLID) &&
2954             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2955                 goto nla_put_failure;
2956         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2957             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2958                        sinfo->plink_state))
2959                 goto nla_put_failure;
2960         switch (rdev->wiphy.signal_type) {
2961         case CFG80211_SIGNAL_TYPE_MBM:
2962                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2963                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2964                                sinfo->signal))
2965                         goto nla_put_failure;
2966                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2967                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2968                                sinfo->signal_avg))
2969                         goto nla_put_failure;
2970                 break;
2971         default:
2972                 break;
2973         }
2974         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2975                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2976                                           NL80211_STA_INFO_TX_BITRATE))
2977                         goto nla_put_failure;
2978         }
2979         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2980                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2981                                           NL80211_STA_INFO_RX_BITRATE))
2982                         goto nla_put_failure;
2983         }
2984         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2985             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2986                         sinfo->rx_packets))
2987                 goto nla_put_failure;
2988         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2989             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2990                         sinfo->tx_packets))
2991                 goto nla_put_failure;
2992         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2993             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2994                         sinfo->tx_retries))
2995                 goto nla_put_failure;
2996         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2997             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2998                         sinfo->tx_failed))
2999                 goto nla_put_failure;
3000         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3001             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3002                         sinfo->beacon_loss_count))
3003                 goto nla_put_failure;
3004         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3005                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3006                 if (!bss_param)
3007                         goto nla_put_failure;
3008
3009                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3010                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3011                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3012                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3013                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3014                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3015                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3016                                sinfo->bss_param.dtim_period) ||
3017                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3018                                 sinfo->bss_param.beacon_interval))
3019                         goto nla_put_failure;
3020
3021                 nla_nest_end(msg, bss_param);
3022         }
3023         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3024             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3025                     sizeof(struct nl80211_sta_flag_update),
3026                     &sinfo->sta_flags))
3027                 goto nla_put_failure;
3028         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3029                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3030                             sinfo->t_offset))
3031                 goto nla_put_failure;
3032         nla_nest_end(msg, sinfoattr);
3033
3034         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3035             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3036                     sinfo->assoc_req_ies))
3037                 goto nla_put_failure;
3038
3039         return genlmsg_end(msg, hdr);
3040
3041  nla_put_failure:
3042         genlmsg_cancel(msg, hdr);
3043         return -EMSGSIZE;
3044 }
3045
3046 static int nl80211_dump_station(struct sk_buff *skb,
3047                                 struct netlink_callback *cb)
3048 {
3049         struct station_info sinfo;
3050         struct cfg80211_registered_device *dev;
3051         struct net_device *netdev;
3052         u8 mac_addr[ETH_ALEN];
3053         int sta_idx = cb->args[1];
3054         int err;
3055
3056         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3057         if (err)
3058                 return err;
3059
3060         if (!dev->ops->dump_station) {
3061                 err = -EOPNOTSUPP;
3062                 goto out_err;
3063         }
3064
3065         while (1) {
3066                 memset(&sinfo, 0, sizeof(sinfo));
3067                 err = rdev_dump_station(dev, netdev, sta_idx,
3068                                         mac_addr, &sinfo);
3069                 if (err == -ENOENT)
3070                         break;
3071                 if (err)
3072                         goto out_err;
3073
3074                 if (nl80211_send_station(skb,
3075                                 NETLINK_CB(cb->skb).portid,
3076                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3077                                 dev, netdev, mac_addr,
3078                                 &sinfo) < 0)
3079                         goto out;
3080
3081                 sta_idx++;
3082         }
3083
3084
3085  out:
3086         cb->args[1] = sta_idx;
3087         err = skb->len;
3088  out_err:
3089         nl80211_finish_netdev_dump(dev);
3090
3091         return err;
3092 }
3093
3094 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3095 {
3096         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3097         struct net_device *dev = info->user_ptr[1];
3098         struct station_info sinfo;
3099         struct sk_buff *msg;
3100         u8 *mac_addr = NULL;
3101         int err;
3102
3103         memset(&sinfo, 0, sizeof(sinfo));
3104
3105         if (!info->attrs[NL80211_ATTR_MAC])
3106                 return -EINVAL;
3107
3108         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3109
3110         if (!rdev->ops->get_station)
3111                 return -EOPNOTSUPP;
3112
3113         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3114         if (err)
3115                 return err;
3116
3117         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3118         if (!msg)
3119                 return -ENOMEM;
3120
3121         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3122                                  rdev, dev, mac_addr, &sinfo) < 0) {
3123                 nlmsg_free(msg);
3124                 return -ENOBUFS;
3125         }
3126
3127         return genlmsg_reply(msg, info);
3128 }
3129
3130 /*
3131  * Get vlan interface making sure it is running and on the right wiphy.
3132  */
3133 static struct net_device *get_vlan(struct genl_info *info,
3134                                    struct cfg80211_registered_device *rdev)
3135 {
3136         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3137         struct net_device *v;
3138         int ret;
3139
3140         if (!vlanattr)
3141                 return NULL;
3142
3143         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3144         if (!v)
3145                 return ERR_PTR(-ENODEV);
3146
3147         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3148                 ret = -EINVAL;
3149                 goto error;
3150         }
3151
3152         if (!netif_running(v)) {
3153                 ret = -ENETDOWN;
3154                 goto error;
3155         }
3156
3157         return v;
3158  error:
3159         dev_put(v);
3160         return ERR_PTR(ret);
3161 }
3162
3163 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3164 {
3165         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3166         int err;
3167         struct net_device *dev = info->user_ptr[1];
3168         struct station_parameters params;
3169         u8 *mac_addr = NULL;
3170
3171         memset(&params, 0, sizeof(params));
3172
3173         params.listen_interval = -1;
3174         params.plink_state = -1;
3175
3176         if (info->attrs[NL80211_ATTR_STA_AID])
3177                 return -EINVAL;
3178
3179         if (!info->attrs[NL80211_ATTR_MAC])
3180                 return -EINVAL;
3181
3182         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3183
3184         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3185                 params.supported_rates =
3186                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3187                 params.supported_rates_len =
3188                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3189         }
3190
3191         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL] ||
3192             info->attrs[NL80211_ATTR_HT_CAPABILITY])
3193                 return -EINVAL;
3194
3195         if (!rdev->ops->change_station)
3196                 return -EOPNOTSUPP;
3197
3198         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3199                 return -EINVAL;
3200
3201         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3202                 params.plink_action =
3203                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3204
3205         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3206                 params.plink_state =
3207                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3208
3209         switch (dev->ieee80211_ptr->iftype) {
3210         case NL80211_IFTYPE_AP:
3211         case NL80211_IFTYPE_AP_VLAN:
3212         case NL80211_IFTYPE_P2P_GO:
3213                 /* disallow mesh-specific things */
3214                 if (params.plink_action)
3215                         return -EINVAL;
3216
3217                 /* TDLS can't be set, ... */
3218                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3219                         return -EINVAL;
3220                 /*
3221                  * ... but don't bother the driver with it. This works around
3222                  * a hostapd/wpa_supplicant issue -- it always includes the
3223                  * TLDS_PEER flag in the mask even for AP mode.
3224                  */
3225                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3226
3227                 /* accept only the listed bits */
3228                 if (params.sta_flags_mask &
3229                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3230                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3231                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3232                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3233                                   BIT(NL80211_STA_FLAG_WME) |
3234                                   BIT(NL80211_STA_FLAG_MFP)))
3235                         return -EINVAL;
3236
3237                 /* but authenticated/associated only if driver handles it */
3238                 if (!(rdev->wiphy.features &
3239                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3240                     params.sta_flags_mask &
3241                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3242                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3243                         return -EINVAL;
3244
3245                 /* reject other things that can't change */
3246                 if (params.supported_rates)
3247                         return -EINVAL;
3248
3249                 /* must be last in here for error handling */
3250                 params.vlan = get_vlan(info, rdev);
3251                 if (IS_ERR(params.vlan))
3252                         return PTR_ERR(params.vlan);
3253                 break;
3254         case NL80211_IFTYPE_P2P_CLIENT:
3255         case NL80211_IFTYPE_STATION:
3256                 /*
3257                  * Don't allow userspace to change the TDLS_PEER flag,
3258                  * but silently ignore attempts to change it since we
3259                  * don't have state here to verify that it doesn't try
3260                  * to change the flag.
3261                  */
3262                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3263                 /* fall through */
3264         case NL80211_IFTYPE_ADHOC:
3265                 /* disallow things sta doesn't support */
3266                 if (params.plink_action)
3267                         return -EINVAL;
3268                 /* reject any changes other than AUTHORIZED */
3269                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3270                         return -EINVAL;
3271                 break;
3272         case NL80211_IFTYPE_MESH_POINT:
3273                 /* disallow things mesh doesn't support */
3274                 if (params.vlan)
3275                         return -EINVAL;
3276                 if (params.supported_rates)
3277                         return -EINVAL;
3278                 /*
3279                  * No special handling for TDLS here -- the userspace
3280                  * mesh code doesn't have this bug.
3281                  */
3282                 if (params.sta_flags_mask &
3283                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3284                                   BIT(NL80211_STA_FLAG_MFP) |
3285                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3286                         return -EINVAL;
3287                 break;
3288         default:
3289                 return -EOPNOTSUPP;
3290         }
3291
3292         /* be aware of params.vlan when changing code here */
3293
3294         err = rdev_change_station(rdev, dev, mac_addr, &params);
3295
3296         if (params.vlan)
3297                 dev_put(params.vlan);
3298
3299         return err;
3300 }
3301
3302 static struct nla_policy
3303 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3304         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3305         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3306 };
3307
3308 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3309 {
3310         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3311         int err;
3312         struct net_device *dev = info->user_ptr[1];
3313         struct station_parameters params;
3314         u8 *mac_addr = NULL;
3315
3316         memset(&params, 0, sizeof(params));
3317
3318         if (!info->attrs[NL80211_ATTR_MAC])
3319                 return -EINVAL;
3320
3321         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3322                 return -EINVAL;
3323
3324         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3325                 return -EINVAL;
3326
3327         if (!info->attrs[NL80211_ATTR_STA_AID])
3328                 return -EINVAL;
3329
3330         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3331         params.supported_rates =
3332                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3333         params.supported_rates_len =
3334                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3335         params.listen_interval =
3336                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3337
3338         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3339         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3340                 return -EINVAL;
3341
3342         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3343                 params.ht_capa =
3344                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3345
3346         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3347                 params.vht_capa =
3348                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3349
3350         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3351                 params.plink_action =
3352                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3353
3354         if (!rdev->ops->add_station)
3355                 return -EOPNOTSUPP;
3356
3357         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3358                 return -EINVAL;
3359
3360         switch (dev->ieee80211_ptr->iftype) {
3361         case NL80211_IFTYPE_AP:
3362         case NL80211_IFTYPE_AP_VLAN:
3363         case NL80211_IFTYPE_P2P_GO:
3364                 /* parse WME attributes if sta is WME capable */
3365                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3366                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3367                     info->attrs[NL80211_ATTR_STA_WME]) {
3368                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3369                         struct nlattr *nla;
3370
3371                         nla = info->attrs[NL80211_ATTR_STA_WME];
3372                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3373                                                nl80211_sta_wme_policy);
3374                         if (err)
3375                                 return err;
3376
3377                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3378                                 params.uapsd_queues =
3379                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3380                         if (params.uapsd_queues &
3381                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3382                                 return -EINVAL;
3383
3384                         if (tb[NL80211_STA_WME_MAX_SP])
3385                                 params.max_sp =
3386                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3387
3388                         if (params.max_sp &
3389                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3390                                 return -EINVAL;
3391
3392                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3393                 }
3394                 /* TDLS peers cannot be added */
3395                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3396                         return -EINVAL;
3397                 /* but don't bother the driver with it */
3398                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3399
3400                 /* allow authenticated/associated only if driver handles it */
3401                 if (!(rdev->wiphy.features &
3402                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3403                     params.sta_flags_mask &
3404                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3405                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3406                         return -EINVAL;
3407
3408                 /* must be last in here for error handling */
3409                 params.vlan = get_vlan(info, rdev);
3410                 if (IS_ERR(params.vlan))
3411                         return PTR_ERR(params.vlan);
3412                 break;
3413         case NL80211_IFTYPE_MESH_POINT:
3414                 /* associated is disallowed */
3415                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3416                         return -EINVAL;
3417                 /* TDLS peers cannot be added */
3418                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3419                         return -EINVAL;
3420                 break;
3421         case NL80211_IFTYPE_STATION:
3422                 /* associated is disallowed */
3423                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3424                         return -EINVAL;
3425                 /* Only TDLS peers can be added */
3426                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3427                         return -EINVAL;
3428                 /* Can only add if TDLS ... */
3429                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3430                         return -EOPNOTSUPP;
3431                 /* ... with external setup is supported */
3432                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3433                         return -EOPNOTSUPP;
3434                 break;
3435         default:
3436                 return -EOPNOTSUPP;
3437         }
3438
3439         /* be aware of params.vlan when changing code here */
3440
3441         err = rdev_add_station(rdev, dev, mac_addr, &params);
3442
3443         if (params.vlan)
3444                 dev_put(params.vlan);
3445         return err;
3446 }
3447
3448 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3449 {
3450         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3451         struct net_device *dev = info->user_ptr[1];
3452         u8 *mac_addr = NULL;
3453
3454         if (info->attrs[NL80211_ATTR_MAC])
3455                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3456
3457         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3458             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3459             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3460             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3461                 return -EINVAL;
3462
3463         if (!rdev->ops->del_station)
3464                 return -EOPNOTSUPP;
3465
3466         return rdev_del_station(rdev, dev, mac_addr);
3467 }
3468
3469 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3470                                 int flags, struct net_device *dev,
3471                                 u8 *dst, u8 *next_hop,
3472                                 struct mpath_info *pinfo)
3473 {
3474         void *hdr;
3475         struct nlattr *pinfoattr;
3476
3477         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3478         if (!hdr)
3479                 return -1;
3480
3481         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3482             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3483             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3484             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3485                 goto nla_put_failure;
3486
3487         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3488         if (!pinfoattr)
3489                 goto nla_put_failure;
3490         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3491             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3492                         pinfo->frame_qlen))
3493                 goto nla_put_failure;
3494         if (((pinfo->filled & MPATH_INFO_SN) &&
3495              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3496             ((pinfo->filled & MPATH_INFO_METRIC) &&
3497              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3498                          pinfo->metric)) ||
3499             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3500              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3501                          pinfo->exptime)) ||
3502             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3503              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3504                         pinfo->flags)) ||
3505             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3506              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3507                          pinfo->discovery_timeout)) ||
3508             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3509              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3510                         pinfo->discovery_retries)))
3511                 goto nla_put_failure;
3512
3513         nla_nest_end(msg, pinfoattr);
3514
3515         return genlmsg_end(msg, hdr);
3516
3517  nla_put_failure:
3518         genlmsg_cancel(msg, hdr);
3519         return -EMSGSIZE;
3520 }
3521
3522 static int nl80211_dump_mpath(struct sk_buff *skb,
3523                               struct netlink_callback *cb)
3524 {
3525         struct mpath_info pinfo;
3526         struct cfg80211_registered_device *dev;
3527         struct net_device *netdev;
3528         u8 dst[ETH_ALEN];
3529         u8 next_hop[ETH_ALEN];
3530         int path_idx = cb->args[1];
3531         int err;
3532
3533         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3534         if (err)
3535                 return err;
3536
3537         if (!dev->ops->dump_mpath) {
3538                 err = -EOPNOTSUPP;
3539                 goto out_err;
3540         }
3541
3542         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3543                 err = -EOPNOTSUPP;
3544                 goto out_err;
3545         }
3546
3547         while (1) {
3548                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3549                                       &pinfo);
3550                 if (err == -ENOENT)
3551                         break;
3552                 if (err)
3553                         goto out_err;
3554
3555                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3556                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3557                                        netdev, dst, next_hop,
3558                                        &pinfo) < 0)
3559                         goto out;
3560
3561                 path_idx++;
3562         }
3563
3564
3565  out:
3566         cb->args[1] = path_idx;
3567         err = skb->len;
3568  out_err:
3569         nl80211_finish_netdev_dump(dev);
3570         return err;
3571 }
3572
3573 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3574 {
3575         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3576         int err;
3577         struct net_device *dev = info->user_ptr[1];
3578         struct mpath_info pinfo;
3579         struct sk_buff *msg;
3580         u8 *dst = NULL;
3581         u8 next_hop[ETH_ALEN];
3582
3583         memset(&pinfo, 0, sizeof(pinfo));
3584
3585         if (!info->attrs[NL80211_ATTR_MAC])
3586                 return -EINVAL;
3587
3588         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3589
3590         if (!rdev->ops->get_mpath)
3591                 return -EOPNOTSUPP;
3592
3593         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3594                 return -EOPNOTSUPP;
3595
3596         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3597         if (err)
3598                 return err;
3599
3600         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3601         if (!msg)
3602                 return -ENOMEM;
3603
3604         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3605                                  dev, dst, next_hop, &pinfo) < 0) {
3606                 nlmsg_free(msg);
3607                 return -ENOBUFS;
3608         }
3609
3610         return genlmsg_reply(msg, info);
3611 }
3612
3613 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3614 {
3615         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3616         struct net_device *dev = info->user_ptr[1];
3617         u8 *dst = NULL;
3618         u8 *next_hop = NULL;
3619
3620         if (!info->attrs[NL80211_ATTR_MAC])
3621                 return -EINVAL;
3622
3623         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3624                 return -EINVAL;
3625
3626         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3627         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3628
3629         if (!rdev->ops->change_mpath)
3630                 return -EOPNOTSUPP;
3631
3632         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3633                 return -EOPNOTSUPP;
3634
3635         return rdev_change_mpath(rdev, dev, dst, next_hop);
3636 }
3637
3638 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3639 {
3640         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3641         struct net_device *dev = info->user_ptr[1];
3642         u8 *dst = NULL;
3643         u8 *next_hop = NULL;
3644
3645         if (!info->attrs[NL80211_ATTR_MAC])
3646                 return -EINVAL;
3647
3648         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3649                 return -EINVAL;
3650
3651         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3652         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3653
3654         if (!rdev->ops->add_mpath)
3655                 return -EOPNOTSUPP;
3656
3657         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3658                 return -EOPNOTSUPP;
3659
3660         return rdev_add_mpath(rdev, dev, dst, next_hop);
3661 }
3662
3663 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3664 {
3665         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3666         struct net_device *dev = info->user_ptr[1];
3667         u8 *dst = NULL;
3668
3669         if (info->attrs[NL80211_ATTR_MAC])
3670                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3671
3672         if (!rdev->ops->del_mpath)
3673                 return -EOPNOTSUPP;
3674
3675         return rdev_del_mpath(rdev, dev, dst);
3676 }
3677
3678 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3679 {
3680         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3681         struct net_device *dev = info->user_ptr[1];
3682         struct bss_parameters params;
3683
3684         memset(&params, 0, sizeof(params));
3685         /* default to not changing parameters */
3686         params.use_cts_prot = -1;
3687         params.use_short_preamble = -1;
3688         params.use_short_slot_time = -1;
3689         params.ap_isolate = -1;
3690         params.ht_opmode = -1;
3691         params.p2p_ctwindow = -1;
3692         params.p2p_opp_ps = -1;
3693
3694         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3695                 params.use_cts_prot =
3696                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3697         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3698                 params.use_short_preamble =
3699                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3700         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3701                 params.use_short_slot_time =
3702                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3703         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3704                 params.basic_rates =
3705                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3706                 params.basic_rates_len =
3707                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3708         }
3709         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3710                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3711         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3712                 params.ht_opmode =
3713                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3714
3715         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3716                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3717                         return -EINVAL;
3718                 params.p2p_ctwindow =
3719                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3720                 if (params.p2p_ctwindow < 0)
3721                         return -EINVAL;
3722                 if (params.p2p_ctwindow != 0 &&
3723                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3724                         return -EINVAL;
3725         }
3726
3727         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3728                 u8 tmp;
3729
3730                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3731                         return -EINVAL;
3732                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3733                 if (tmp > 1)
3734                         return -EINVAL;
3735                 params.p2p_opp_ps = tmp;
3736                 if (params.p2p_opp_ps &&
3737                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3738                         return -EINVAL;
3739         }
3740
3741         if (!rdev->ops->change_bss)
3742                 return -EOPNOTSUPP;
3743
3744         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3745             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3746                 return -EOPNOTSUPP;
3747
3748         return rdev_change_bss(rdev, dev, &params);
3749 }
3750
3751 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3752         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3753         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3754         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3755         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3756         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3757         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3758 };
3759
3760 static int parse_reg_rule(struct nlattr *tb[],
3761         struct ieee80211_reg_rule *reg_rule)
3762 {
3763         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3764         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3765
3766         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3767                 return -EINVAL;
3768         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3769                 return -EINVAL;
3770         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3771                 return -EINVAL;
3772         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3773                 return -EINVAL;
3774         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3775                 return -EINVAL;
3776
3777         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3778
3779         freq_range->start_freq_khz =
3780                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3781         freq_range->end_freq_khz =
3782                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3783         freq_range->max_bandwidth_khz =
3784                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3785
3786         power_rule->max_eirp =
3787                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3788
3789         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3790                 power_rule->max_antenna_gain =
3791                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3792
3793         return 0;
3794 }
3795
3796 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3797 {
3798         int r;
3799         char *data = NULL;
3800         enum nl80211_user_reg_hint_type user_reg_hint_type;
3801
3802         /*
3803          * You should only get this when cfg80211 hasn't yet initialized
3804          * completely when built-in to the kernel right between the time
3805          * window between nl80211_init() and regulatory_init(), if that is
3806          * even possible.
3807          */
3808         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
3809                 return -EINPROGRESS;
3810
3811         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3812                 return -EINVAL;
3813
3814         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3815
3816         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
3817                 user_reg_hint_type =
3818                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
3819         else
3820                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
3821
3822         switch (user_reg_hint_type) {
3823         case NL80211_USER_REG_HINT_USER:
3824         case NL80211_USER_REG_HINT_CELL_BASE:
3825                 break;
3826         default:
3827                 return -EINVAL;
3828         }
3829
3830         r = regulatory_hint_user(data, user_reg_hint_type);
3831
3832         return r;
3833 }
3834
3835 static int nl80211_get_mesh_config(struct sk_buff *skb,
3836                                    struct genl_info *info)
3837 {
3838         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3839         struct net_device *dev = info->user_ptr[1];
3840         struct wireless_dev *wdev = dev->ieee80211_ptr;
3841         struct mesh_config cur_params;
3842         int err = 0;
3843         void *hdr;
3844         struct nlattr *pinfoattr;
3845         struct sk_buff *msg;
3846
3847         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3848                 return -EOPNOTSUPP;
3849
3850         if (!rdev->ops->get_mesh_config)
3851                 return -EOPNOTSUPP;
3852
3853         wdev_lock(wdev);
3854         /* If not connected, get default parameters */
3855         if (!wdev->mesh_id_len)
3856                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3857         else
3858                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
3859         wdev_unlock(wdev);
3860
3861         if (err)
3862                 return err;
3863
3864         /* Draw up a netlink message to send back */
3865         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3866         if (!msg)
3867                 return -ENOMEM;
3868         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3869                              NL80211_CMD_GET_MESH_CONFIG);
3870         if (!hdr)
3871                 goto out;
3872         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3873         if (!pinfoattr)
3874                 goto nla_put_failure;
3875         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3876             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3877                         cur_params.dot11MeshRetryTimeout) ||
3878             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3879                         cur_params.dot11MeshConfirmTimeout) ||
3880             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3881                         cur_params.dot11MeshHoldingTimeout) ||
3882             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3883                         cur_params.dot11MeshMaxPeerLinks) ||
3884             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3885                        cur_params.dot11MeshMaxRetries) ||
3886             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3887                        cur_params.dot11MeshTTL) ||
3888             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3889                        cur_params.element_ttl) ||
3890             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3891                        cur_params.auto_open_plinks) ||
3892             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3893                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3894             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3895                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3896             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3897                         cur_params.path_refresh_time) ||
3898             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3899                         cur_params.min_discovery_timeout) ||
3900             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3901                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3902             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3903                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3904             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3905                         cur_params.dot11MeshHWMPperrMinInterval) ||
3906             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3907                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3908             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3909                        cur_params.dot11MeshHWMPRootMode) ||
3910             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3911                         cur_params.dot11MeshHWMPRannInterval) ||
3912             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3913                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3914             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3915                        cur_params.dot11MeshForwarding) ||
3916             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3917                         cur_params.rssi_threshold) ||
3918             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3919                         cur_params.ht_opmode) ||
3920             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3921                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3922             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3923                         cur_params.dot11MeshHWMProotInterval) ||
3924             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3925                         cur_params.dot11MeshHWMPconfirmationInterval))
3926                 goto nla_put_failure;
3927         nla_nest_end(msg, pinfoattr);
3928         genlmsg_end(msg, hdr);
3929         return genlmsg_reply(msg, info);
3930
3931  nla_put_failure:
3932         genlmsg_cancel(msg, hdr);
3933  out:
3934         nlmsg_free(msg);
3935         return -ENOBUFS;
3936 }
3937
3938 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3939         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3940         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3941         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3942         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3943         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3944         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3945         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3946         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3947         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3948         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3949         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3950         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3951         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3952         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3953         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3954         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3955         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3956         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3957         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3958         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3959         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3960         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3961         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3962         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3963         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3964 };
3965
3966 static const struct nla_policy
3967         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3968         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3969         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3970         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3971         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3972         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3973                                     .len = IEEE80211_MAX_DATA_LEN },
3974         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3975 };
3976
3977 static int nl80211_parse_mesh_config(struct genl_info *info,
3978                                      struct mesh_config *cfg,
3979                                      u32 *mask_out)
3980 {
3981         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3982         u32 mask = 0;
3983
3984 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
3985 do {                                                                        \
3986         if (tb[attr]) {                                                     \
3987                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
3988                         return -EINVAL;                                     \
3989                 cfg->param = fn(tb[attr]);                                  \
3990                 mask |= (1 << (attr - 1));                                  \
3991         }                                                                   \
3992 } while (0)
3993
3994
3995         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3996                 return -EINVAL;
3997         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3998                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3999                              nl80211_meshconf_params_policy))
4000                 return -EINVAL;
4001
4002         /* This makes sure that there aren't more than 32 mesh config
4003          * parameters (otherwise our bitfield scheme would not work.) */
4004         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4005
4006         /* Fill in the params struct */
4007         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4008                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4009                                   nla_get_u16);
4010         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4011                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4012                                   nla_get_u16);
4013         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4014                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4015                                   nla_get_u16);
4016         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4017                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4018                                   nla_get_u16);
4019         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4020                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4021                                   nla_get_u8);
4022         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4023                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4024         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4025                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4026                                   nla_get_u8);
4027         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4028                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4029                                   nla_get_u8);
4030         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4031                                   1, 255, mask,
4032                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4033                                   nla_get_u32);
4034         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4035                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4036                                   nla_get_u8);
4037         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4038                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4039                                   nla_get_u32);
4040         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4041                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4042                                   nla_get_u16);
4043         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4044                                   1, 65535, mask,
4045                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4046                                   nla_get_u32);
4047         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4048                                   1, 65535, mask,
4049                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4050                                   nla_get_u16);
4051         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4052                                   1, 65535, mask,
4053                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4054                                   nla_get_u16);
4055         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4056                                   dot11MeshHWMPnetDiameterTraversalTime,
4057                                   1, 65535, mask,
4058                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4059                                   nla_get_u16);
4060         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4061                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4062                                   nla_get_u8);
4063         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4064                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4065                                   nla_get_u16);
4066         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4067                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4068                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4069                                   nla_get_u8);
4070         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4071                                   mask, NL80211_MESHCONF_FORWARDING,
4072                                   nla_get_u8);
4073         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4074                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4075                                   nla_get_u32);
4076         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4077                                   mask, NL80211_MESHCONF_HT_OPMODE,
4078                                   nla_get_u16);
4079         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4080                                   1, 65535, mask,
4081                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4082                                   nla_get_u32);
4083         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4084                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4085                                   nla_get_u16);
4086         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4087                                   dot11MeshHWMPconfirmationInterval,
4088                                   1, 65535, mask,
4089                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4090                                   nla_get_u16);
4091         if (mask_out)
4092                 *mask_out = mask;
4093
4094         return 0;
4095
4096 #undef FILL_IN_MESH_PARAM_IF_SET
4097 }
4098
4099 static int nl80211_parse_mesh_setup(struct genl_info *info,
4100                                      struct mesh_setup *setup)
4101 {
4102         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4103
4104         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4105                 return -EINVAL;
4106         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4107                              info->attrs[NL80211_ATTR_MESH_SETUP],
4108                              nl80211_mesh_setup_params_policy))
4109                 return -EINVAL;
4110
4111         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4112                 setup->sync_method =
4113                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4114                  IEEE80211_SYNC_METHOD_VENDOR :
4115                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4116
4117         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4118                 setup->path_sel_proto =
4119                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4120                  IEEE80211_PATH_PROTOCOL_VENDOR :
4121                  IEEE80211_PATH_PROTOCOL_HWMP;
4122
4123         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4124                 setup->path_metric =
4125                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4126                  IEEE80211_PATH_METRIC_VENDOR :
4127                  IEEE80211_PATH_METRIC_AIRTIME;
4128
4129
4130         if (tb[NL80211_MESH_SETUP_IE]) {
4131                 struct nlattr *ieattr =
4132                         tb[NL80211_MESH_SETUP_IE];
4133                 if (!is_valid_ie_attr(ieattr))
4134                         return -EINVAL;
4135                 setup->ie = nla_data(ieattr);
4136                 setup->ie_len = nla_len(ieattr);
4137         }
4138         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4139         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4140
4141         return 0;
4142 }
4143
4144 static int nl80211_update_mesh_config(struct sk_buff *skb,
4145                                       struct genl_info *info)
4146 {
4147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4148         struct net_device *dev = info->user_ptr[1];
4149         struct wireless_dev *wdev = dev->ieee80211_ptr;
4150         struct mesh_config cfg;
4151         u32 mask;
4152         int err;
4153
4154         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4155                 return -EOPNOTSUPP;
4156
4157         if (!rdev->ops->update_mesh_config)
4158                 return -EOPNOTSUPP;
4159
4160         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4161         if (err)
4162                 return err;
4163
4164         wdev_lock(wdev);
4165         if (!wdev->mesh_id_len)
4166                 err = -ENOLINK;
4167
4168         if (!err)
4169                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4170
4171         wdev_unlock(wdev);
4172
4173         return err;
4174 }
4175
4176 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4177 {
4178         const struct ieee80211_regdomain *regdom;
4179         struct sk_buff *msg;
4180         void *hdr = NULL;
4181         struct nlattr *nl_reg_rules;
4182         unsigned int i;
4183         int err = -EINVAL;
4184
4185         mutex_lock(&cfg80211_mutex);
4186
4187         if (!cfg80211_regdomain)
4188                 goto out;
4189
4190         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4191         if (!msg) {
4192                 err = -ENOBUFS;
4193                 goto out;
4194         }
4195
4196         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4197                              NL80211_CMD_GET_REG);
4198         if (!hdr)
4199                 goto put_failure;
4200
4201         if (reg_last_request_cell_base() &&
4202             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4203                         NL80211_USER_REG_HINT_CELL_BASE))
4204                 goto nla_put_failure;
4205
4206         rcu_read_lock();
4207         regdom = rcu_dereference(cfg80211_regdomain);
4208
4209         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4210             (regdom->dfs_region &&
4211              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4212                 goto nla_put_failure_rcu;
4213
4214         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4215         if (!nl_reg_rules)
4216                 goto nla_put_failure_rcu;
4217
4218         for (i = 0; i < regdom->n_reg_rules; i++) {
4219                 struct nlattr *nl_reg_rule;
4220                 const struct ieee80211_reg_rule *reg_rule;
4221                 const struct ieee80211_freq_range *freq_range;
4222                 const struct ieee80211_power_rule *power_rule;
4223
4224                 reg_rule = &regdom->reg_rules[i];
4225                 freq_range = &reg_rule->freq_range;
4226                 power_rule = &reg_rule->power_rule;
4227
4228                 nl_reg_rule = nla_nest_start(msg, i);
4229                 if (!nl_reg_rule)
4230                         goto nla_put_failure_rcu;
4231
4232                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4233                                 reg_rule->flags) ||
4234                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4235                                 freq_range->start_freq_khz) ||
4236                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4237                                 freq_range->end_freq_khz) ||
4238                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4239                                 freq_range->max_bandwidth_khz) ||
4240                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4241                                 power_rule->max_antenna_gain) ||
4242                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4243                                 power_rule->max_eirp))
4244                         goto nla_put_failure_rcu;
4245
4246                 nla_nest_end(msg, nl_reg_rule);
4247         }
4248         rcu_read_unlock();
4249
4250         nla_nest_end(msg, nl_reg_rules);
4251
4252         genlmsg_end(msg, hdr);
4253         err = genlmsg_reply(msg, info);
4254         goto out;
4255
4256 nla_put_failure_rcu:
4257         rcu_read_unlock();
4258 nla_put_failure:
4259         genlmsg_cancel(msg, hdr);
4260 put_failure:
4261         nlmsg_free(msg);
4262         err = -EMSGSIZE;
4263 out:
4264         mutex_unlock(&cfg80211_mutex);
4265         return err;
4266 }
4267
4268 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4269 {
4270         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4271         struct nlattr *nl_reg_rule;
4272         char *alpha2 = NULL;
4273         int rem_reg_rules = 0, r = 0;
4274         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4275         u8 dfs_region = 0;
4276         struct ieee80211_regdomain *rd = NULL;
4277
4278         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4279                 return -EINVAL;
4280
4281         if (!info->attrs[NL80211_ATTR_REG_RULES])
4282                 return -EINVAL;
4283
4284         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4285
4286         if (info->attrs[NL80211_ATTR_DFS_REGION])
4287                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4288
4289         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4290                             rem_reg_rules) {
4291                 num_rules++;
4292                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4293                         return -EINVAL;
4294         }
4295
4296         size_of_regd = sizeof(struct ieee80211_regdomain) +
4297                        num_rules * sizeof(struct ieee80211_reg_rule);
4298
4299         rd = kzalloc(size_of_regd, GFP_KERNEL);
4300         if (!rd)
4301                 return -ENOMEM;
4302
4303         rd->n_reg_rules = num_rules;
4304         rd->alpha2[0] = alpha2[0];
4305         rd->alpha2[1] = alpha2[1];
4306
4307         /*
4308          * Disable DFS master mode if the DFS region was
4309          * not supported or known on this kernel.
4310          */
4311         if (reg_supported_dfs_region(dfs_region))
4312                 rd->dfs_region = dfs_region;
4313
4314         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4315                             rem_reg_rules) {
4316                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4317                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4318                           reg_rule_policy);
4319                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4320                 if (r)
4321                         goto bad_reg;
4322
4323                 rule_idx++;
4324
4325                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4326                         r = -EINVAL;
4327                         goto bad_reg;
4328                 }
4329         }
4330
4331         mutex_lock(&cfg80211_mutex);
4332
4333         r = set_regdom(rd);
4334         /* set_regdom took ownership */
4335         rd = NULL;
4336         mutex_unlock(&cfg80211_mutex);
4337
4338  bad_reg:
4339         kfree(rd);
4340         return r;
4341 }
4342
4343 static int validate_scan_freqs(struct nlattr *freqs)
4344 {
4345         struct nlattr *attr1, *attr2;
4346         int n_channels = 0, tmp1, tmp2;
4347
4348         nla_for_each_nested(attr1, freqs, tmp1) {
4349                 n_channels++;
4350                 /*
4351                  * Some hardware has a limited channel list for
4352                  * scanning, and it is pretty much nonsensical
4353                  * to scan for a channel twice, so disallow that
4354                  * and don't require drivers to check that the
4355                  * channel list they get isn't longer than what
4356                  * they can scan, as long as they can scan all
4357                  * the channels they registered at once.
4358                  */
4359                 nla_for_each_nested(attr2, freqs, tmp2)
4360                         if (attr1 != attr2 &&
4361                             nla_get_u32(attr1) == nla_get_u32(attr2))
4362                                 return 0;
4363         }
4364
4365         return n_channels;
4366 }
4367
4368 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4369 {
4370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4371         struct wireless_dev *wdev = info->user_ptr[1];
4372         struct cfg80211_scan_request *request;
4373         struct nlattr *attr;
4374         struct wiphy *wiphy;
4375         int err, tmp, n_ssids = 0, n_channels, i;
4376         size_t ie_len;
4377
4378         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4379                 return -EINVAL;
4380
4381         wiphy = &rdev->wiphy;
4382
4383         if (!rdev->ops->scan)
4384                 return -EOPNOTSUPP;
4385
4386         if (rdev->scan_req)
4387                 return -EBUSY;
4388
4389         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4390                 n_channels = validate_scan_freqs(
4391                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4392                 if (!n_channels)
4393                         return -EINVAL;
4394         } else {
4395                 enum ieee80211_band band;
4396                 n_channels = 0;
4397
4398                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4399                         if (wiphy->bands[band])
4400                                 n_channels += wiphy->bands[band]->n_channels;
4401         }
4402
4403         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4404                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4405                         n_ssids++;
4406
4407         if (n_ssids > wiphy->max_scan_ssids)
4408                 return -EINVAL;
4409
4410         if (info->attrs[NL80211_ATTR_IE])
4411                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4412         else
4413                 ie_len = 0;
4414
4415         if (ie_len > wiphy->max_scan_ie_len)
4416                 return -EINVAL;
4417
4418         request = kzalloc(sizeof(*request)
4419                         + sizeof(*request->ssids) * n_ssids
4420                         + sizeof(*request->channels) * n_channels
4421                         + ie_len, GFP_KERNEL);
4422         if (!request)
4423                 return -ENOMEM;
4424
4425         if (n_ssids)
4426                 request->ssids = (void *)&request->channels[n_channels];
4427         request->n_ssids = n_ssids;
4428         if (ie_len) {
4429                 if (request->ssids)
4430                         request->ie = (void *)(request->ssids + n_ssids);
4431                 else
4432                         request->ie = (void *)(request->channels + n_channels);
4433         }
4434
4435         i = 0;
4436         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4437                 /* user specified, bail out if channel not found */
4438                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4439                         struct ieee80211_channel *chan;
4440
4441                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4442
4443                         if (!chan) {
4444                                 err = -EINVAL;
4445                                 goto out_free;
4446                         }
4447
4448                         /* ignore disabled channels */
4449                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4450                                 continue;
4451
4452                         request->channels[i] = chan;
4453                         i++;
4454                 }
4455         } else {
4456                 enum ieee80211_band band;
4457
4458                 /* all channels */
4459                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4460                         int j;
4461                         if (!wiphy->bands[band])
4462                                 continue;
4463                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4464                                 struct ieee80211_channel *chan;
4465
4466                                 chan = &wiphy->bands[band]->channels[j];
4467
4468                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4469                                         continue;
4470
4471                                 request->channels[i] = chan;
4472                                 i++;
4473                         }
4474                 }
4475         }
4476
4477         if (!i) {
4478                 err = -EINVAL;
4479                 goto out_free;
4480         }
4481
4482         request->n_channels = i;
4483
4484         i = 0;
4485         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4486                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4487                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4488                                 err = -EINVAL;
4489                                 goto out_free;
4490                         }
4491                         request->ssids[i].ssid_len = nla_len(attr);
4492                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4493                         i++;
4494                 }
4495         }
4496
4497         if (info->attrs[NL80211_ATTR_IE]) {
4498                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4499                 memcpy((void *)request->ie,
4500                        nla_data(info->attrs[NL80211_ATTR_IE]),
4501                        request->ie_len);
4502         }
4503
4504         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4505                 if (wiphy->bands[i])
4506                         request->rates[i] =
4507                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4508
4509         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4510                 nla_for_each_nested(attr,
4511                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4512                                     tmp) {
4513                         enum ieee80211_band band = nla_type(attr);
4514
4515                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4516                                 err = -EINVAL;
4517                                 goto out_free;
4518                         }
4519                         err = ieee80211_get_ratemask(wiphy->bands[band],
4520                                                      nla_data(attr),
4521                                                      nla_len(attr),
4522                                                      &request->rates[band]);
4523                         if (err)
4524                                 goto out_free;
4525                 }
4526         }
4527
4528         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4529                 request->flags = nla_get_u32(
4530                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4531                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4532                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4533                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4534                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4535                         err = -EOPNOTSUPP;
4536                         goto out_free;
4537                 }
4538         }
4539
4540         request->no_cck =
4541                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4542
4543         request->wdev = wdev;
4544         request->wiphy = &rdev->wiphy;
4545         request->scan_start = jiffies;
4546
4547         rdev->scan_req = request;
4548         err = rdev_scan(rdev, request);
4549
4550         if (!err) {
4551                 nl80211_send_scan_start(rdev, wdev);
4552                 if (wdev->netdev)
4553                         dev_hold(wdev->netdev);
4554         } else {
4555  out_free:
4556                 rdev->scan_req = NULL;
4557                 kfree(request);
4558         }
4559
4560         return err;
4561 }
4562
4563 static int nl80211_start_sched_scan(struct sk_buff *skb,
4564                                     struct genl_info *info)
4565 {
4566         struct cfg80211_sched_scan_request *request;
4567         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4568         struct net_device *dev = info->user_ptr[1];
4569         struct nlattr *attr;
4570         struct wiphy *wiphy;
4571         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4572         u32 interval;
4573         enum ieee80211_band band;
4574         size_t ie_len;
4575         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4576
4577         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4578             !rdev->ops->sched_scan_start)
4579                 return -EOPNOTSUPP;
4580
4581         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4582                 return -EINVAL;
4583
4584         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4585                 return -EINVAL;
4586
4587         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4588         if (interval == 0)
4589                 return -EINVAL;
4590
4591         wiphy = &rdev->wiphy;
4592
4593         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4594                 n_channels = validate_scan_freqs(
4595                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4596                 if (!n_channels)
4597                         return -EINVAL;
4598         } else {
4599                 n_channels = 0;
4600
4601                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4602                         if (wiphy->bands[band])
4603                                 n_channels += wiphy->bands[band]->n_channels;
4604         }
4605
4606         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4607                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4608                                     tmp)
4609                         n_ssids++;
4610
4611         if (n_ssids > wiphy->max_sched_scan_ssids)
4612                 return -EINVAL;
4613
4614         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4615                 nla_for_each_nested(attr,
4616                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4617                                     tmp)
4618                         n_match_sets++;
4619
4620         if (n_match_sets > wiphy->max_match_sets)
4621                 return -EINVAL;
4622
4623         if (info->attrs[NL80211_ATTR_IE])
4624                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4625         else
4626                 ie_len = 0;
4627
4628         if (ie_len > wiphy->max_sched_scan_ie_len)
4629                 return -EINVAL;
4630
4631         mutex_lock(&rdev->sched_scan_mtx);
4632
4633         if (rdev->sched_scan_req) {
4634                 err = -EINPROGRESS;
4635                 goto out;
4636         }
4637
4638         request = kzalloc(sizeof(*request)
4639                         + sizeof(*request->ssids) * n_ssids
4640                         + sizeof(*request->match_sets) * n_match_sets
4641                         + sizeof(*request->channels) * n_channels
4642                         + ie_len, GFP_KERNEL);
4643         if (!request) {
4644                 err = -ENOMEM;
4645                 goto out;
4646         }
4647
4648         if (n_ssids)
4649                 request->ssids = (void *)&request->channels[n_channels];
4650         request->n_ssids = n_ssids;
4651         if (ie_len) {
4652                 if (request->ssids)
4653                         request->ie = (void *)(request->ssids + n_ssids);
4654                 else
4655                         request->ie = (void *)(request->channels + n_channels);
4656         }
4657
4658         if (n_match_sets) {
4659                 if (request->ie)
4660                         request->match_sets = (void *)(request->ie + ie_len);
4661                 else if (request->ssids)
4662                         request->match_sets =
4663                                 (void *)(request->ssids + n_ssids);
4664                 else
4665                         request->match_sets =
4666                                 (void *)(request->channels + n_channels);
4667         }
4668         request->n_match_sets = n_match_sets;
4669
4670         i = 0;
4671         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4672                 /* user specified, bail out if channel not found */
4673                 nla_for_each_nested(attr,
4674                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4675                                     tmp) {
4676                         struct ieee80211_channel *chan;
4677
4678                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4679
4680                         if (!chan) {
4681                                 err = -EINVAL;
4682                                 goto out_free;
4683                         }
4684
4685                         /* ignore disabled channels */
4686                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4687                                 continue;
4688
4689                         request->channels[i] = chan;
4690                         i++;
4691                 }
4692         } else {
4693                 /* all channels */
4694                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4695                         int j;
4696                         if (!wiphy->bands[band])
4697                                 continue;
4698                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4699                                 struct ieee80211_channel *chan;
4700
4701                                 chan = &wiphy->bands[band]->channels[j];
4702
4703                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4704                                         continue;
4705
4706                                 request->channels[i] = chan;
4707                                 i++;
4708                         }
4709                 }
4710         }
4711
4712         if (!i) {
4713                 err = -EINVAL;
4714                 goto out_free;
4715         }
4716
4717         request->n_channels = i;
4718
4719         i = 0;
4720         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4721                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4722                                     tmp) {
4723                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4724                                 err = -EINVAL;
4725                                 goto out_free;
4726                         }
4727                         request->ssids[i].ssid_len = nla_len(attr);
4728                         memcpy(request->ssids[i].ssid, nla_data(attr),
4729                                nla_len(attr));
4730                         i++;
4731                 }
4732         }
4733
4734         i = 0;
4735         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4736                 nla_for_each_nested(attr,
4737                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4738                                     tmp) {
4739                         struct nlattr *ssid, *rssi;
4740
4741                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4742                                   nla_data(attr), nla_len(attr),
4743                                   nl80211_match_policy);
4744                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4745                         if (ssid) {
4746                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4747                                         err = -EINVAL;
4748                                         goto out_free;
4749                                 }
4750                                 memcpy(request->match_sets[i].ssid.ssid,
4751                                        nla_data(ssid), nla_len(ssid));
4752                                 request->match_sets[i].ssid.ssid_len =
4753                                         nla_len(ssid);
4754                         }
4755                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4756                         if (rssi)
4757                                 request->rssi_thold = nla_get_u32(rssi);
4758                         else
4759                                 request->rssi_thold =
4760                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4761                         i++;
4762                 }
4763         }
4764
4765         if (info->attrs[NL80211_ATTR_IE]) {
4766                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4767                 memcpy((void *)request->ie,
4768                        nla_data(info->attrs[NL80211_ATTR_IE]),
4769                        request->ie_len);
4770         }
4771
4772         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4773                 request->flags = nla_get_u32(
4774                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4775                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4776                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4777                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4778                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4779                         err = -EOPNOTSUPP;
4780                         goto out_free;
4781                 }
4782         }
4783
4784         request->dev = dev;
4785         request->wiphy = &rdev->wiphy;
4786         request->interval = interval;
4787         request->scan_start = jiffies;
4788
4789         err = rdev_sched_scan_start(rdev, dev, request);
4790         if (!err) {
4791                 rdev->sched_scan_req = request;
4792                 nl80211_send_sched_scan(rdev, dev,
4793                                         NL80211_CMD_START_SCHED_SCAN);
4794                 goto out;
4795         }
4796
4797 out_free:
4798         kfree(request);
4799 out:
4800         mutex_unlock(&rdev->sched_scan_mtx);
4801         return err;
4802 }
4803
4804 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4805                                    struct genl_info *info)
4806 {
4807         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4808         int err;
4809
4810         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4811             !rdev->ops->sched_scan_stop)
4812                 return -EOPNOTSUPP;
4813
4814         mutex_lock(&rdev->sched_scan_mtx);
4815         err = __cfg80211_stop_sched_scan(rdev, false);
4816         mutex_unlock(&rdev->sched_scan_mtx);
4817
4818         return err;
4819 }
4820
4821 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4822                             u32 seq, int flags,
4823                             struct cfg80211_registered_device *rdev,
4824                             struct wireless_dev *wdev,
4825                             struct cfg80211_internal_bss *intbss)
4826 {
4827         struct cfg80211_bss *res = &intbss->pub;
4828         const struct cfg80211_bss_ies *ies;
4829         void *hdr;
4830         struct nlattr *bss;
4831
4832         ASSERT_WDEV_LOCK(wdev);
4833
4834         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
4835                              NL80211_CMD_NEW_SCAN_RESULTS);
4836         if (!hdr)
4837                 return -1;
4838
4839         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4840
4841         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4842             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4843                 goto nla_put_failure;
4844
4845         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4846         if (!bss)
4847                 goto nla_put_failure;
4848         if ((!is_zero_ether_addr(res->bssid) &&
4849              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
4850                 goto nla_put_failure;
4851
4852         rcu_read_lock();
4853         ies = rcu_dereference(res->ies);
4854         if (ies && ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4855                                        ies->len, ies->data)) {
4856                 rcu_read_unlock();
4857                 goto nla_put_failure;
4858         }
4859         ies = rcu_dereference(res->beacon_ies);
4860         if (ies && ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
4861                                        ies->len, ies->data)) {
4862                 rcu_read_unlock();
4863                 goto nla_put_failure;
4864         }
4865         rcu_read_unlock();
4866
4867         if (res->tsf &&
4868             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4869                 goto nla_put_failure;
4870         if (res->beacon_interval &&
4871             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4872                 goto nla_put_failure;
4873         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4874             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4875             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4876                         jiffies_to_msecs(jiffies - intbss->ts)))
4877                 goto nla_put_failure;
4878
4879         switch (rdev->wiphy.signal_type) {
4880         case CFG80211_SIGNAL_TYPE_MBM:
4881                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4882                         goto nla_put_failure;
4883                 break;
4884         case CFG80211_SIGNAL_TYPE_UNSPEC:
4885                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4886                         goto nla_put_failure;
4887                 break;
4888         default:
4889                 break;
4890         }
4891
4892         switch (wdev->iftype) {
4893         case NL80211_IFTYPE_P2P_CLIENT:
4894         case NL80211_IFTYPE_STATION:
4895                 if (intbss == wdev->current_bss &&
4896                     nla_put_u32(msg, NL80211_BSS_STATUS,
4897                                 NL80211_BSS_STATUS_ASSOCIATED))
4898                         goto nla_put_failure;
4899                 break;
4900         case NL80211_IFTYPE_ADHOC:
4901                 if (intbss == wdev->current_bss &&
4902                     nla_put_u32(msg, NL80211_BSS_STATUS,
4903                                 NL80211_BSS_STATUS_IBSS_JOINED))
4904                         goto nla_put_failure;
4905                 break;
4906         default:
4907                 break;
4908         }
4909
4910         nla_nest_end(msg, bss);
4911
4912         return genlmsg_end(msg, hdr);
4913
4914  nla_put_failure:
4915         genlmsg_cancel(msg, hdr);
4916         return -EMSGSIZE;
4917 }
4918
4919 static int nl80211_dump_scan(struct sk_buff *skb,
4920                              struct netlink_callback *cb)
4921 {
4922         struct cfg80211_registered_device *rdev;
4923         struct net_device *dev;
4924         struct cfg80211_internal_bss *scan;
4925         struct wireless_dev *wdev;
4926         int start = cb->args[1], idx = 0;
4927         int err;
4928
4929         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4930         if (err)
4931                 return err;
4932
4933         wdev = dev->ieee80211_ptr;
4934
4935         wdev_lock(wdev);
4936         spin_lock_bh(&rdev->bss_lock);
4937         cfg80211_bss_expire(rdev);
4938
4939         cb->seq = rdev->bss_generation;
4940
4941         list_for_each_entry(scan, &rdev->bss_list, list) {
4942                 if (++idx <= start)
4943                         continue;
4944                 if (nl80211_send_bss(skb, cb,
4945                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4946                                 rdev, wdev, scan) < 0) {
4947                         idx--;
4948                         break;
4949                 }
4950         }
4951
4952         spin_unlock_bh(&rdev->bss_lock);
4953         wdev_unlock(wdev);
4954
4955         cb->args[1] = idx;
4956         nl80211_finish_netdev_dump(rdev);
4957
4958         return skb->len;
4959 }
4960
4961 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
4962                                 int flags, struct net_device *dev,
4963                                 struct survey_info *survey)
4964 {
4965         void *hdr;
4966         struct nlattr *infoattr;
4967
4968         hdr = nl80211hdr_put(msg, portid, seq, flags,
4969                              NL80211_CMD_NEW_SURVEY_RESULTS);
4970         if (!hdr)
4971                 return -ENOMEM;
4972
4973         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4974                 goto nla_put_failure;
4975
4976         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4977         if (!infoattr)
4978                 goto nla_put_failure;
4979
4980         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4981                         survey->channel->center_freq))
4982                 goto nla_put_failure;
4983
4984         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4985             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4986                 goto nla_put_failure;
4987         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4988             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4989                 goto nla_put_failure;
4990         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4991             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4992                         survey->channel_time))
4993                 goto nla_put_failure;
4994         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4995             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4996                         survey->channel_time_busy))
4997                 goto nla_put_failure;
4998         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4999             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5000                         survey->channel_time_ext_busy))
5001                 goto nla_put_failure;
5002         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5003             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5004                         survey->channel_time_rx))
5005                 goto nla_put_failure;
5006         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5007             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5008                         survey->channel_time_tx))
5009                 goto nla_put_failure;
5010
5011         nla_nest_end(msg, infoattr);
5012
5013         return genlmsg_end(msg, hdr);
5014
5015  nla_put_failure:
5016         genlmsg_cancel(msg, hdr);
5017         return -EMSGSIZE;
5018 }
5019
5020 static int nl80211_dump_survey(struct sk_buff *skb,
5021                         struct netlink_callback *cb)
5022 {
5023         struct survey_info survey;
5024         struct cfg80211_registered_device *dev;
5025         struct net_device *netdev;
5026         int survey_idx = cb->args[1];
5027         int res;
5028
5029         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5030         if (res)
5031                 return res;
5032
5033         if (!dev->ops->dump_survey) {
5034                 res = -EOPNOTSUPP;
5035                 goto out_err;
5036         }
5037
5038         while (1) {
5039                 struct ieee80211_channel *chan;
5040
5041                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5042                 if (res == -ENOENT)
5043                         break;
5044                 if (res)
5045                         goto out_err;
5046
5047                 /* Survey without a channel doesn't make sense */
5048                 if (!survey.channel) {
5049                         res = -EINVAL;
5050                         goto out;
5051                 }
5052
5053                 chan = ieee80211_get_channel(&dev->wiphy,
5054                                              survey.channel->center_freq);
5055                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5056                         survey_idx++;
5057                         continue;
5058                 }
5059
5060                 if (nl80211_send_survey(skb,
5061                                 NETLINK_CB(cb->skb).portid,
5062                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5063                                 netdev,
5064                                 &survey) < 0)
5065                         goto out;
5066                 survey_idx++;
5067         }
5068
5069  out:
5070         cb->args[1] = survey_idx;
5071         res = skb->len;
5072  out_err:
5073         nl80211_finish_netdev_dump(dev);
5074         return res;
5075 }
5076
5077 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5078 {
5079         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5080                                   NL80211_WPA_VERSION_2));
5081 }
5082
5083 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5084 {
5085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5086         struct net_device *dev = info->user_ptr[1];
5087         struct ieee80211_channel *chan;
5088         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5089         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5090         enum nl80211_auth_type auth_type;
5091         struct key_parse key;
5092         bool local_state_change;
5093
5094         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5095                 return -EINVAL;
5096
5097         if (!info->attrs[NL80211_ATTR_MAC])
5098                 return -EINVAL;
5099
5100         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5101                 return -EINVAL;
5102
5103         if (!info->attrs[NL80211_ATTR_SSID])
5104                 return -EINVAL;
5105
5106         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5107                 return -EINVAL;
5108
5109         err = nl80211_parse_key(info, &key);
5110         if (err)
5111                 return err;
5112
5113         if (key.idx >= 0) {
5114                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5115                         return -EINVAL;
5116                 if (!key.p.key || !key.p.key_len)
5117                         return -EINVAL;
5118                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5119                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5120                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5121                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5122                         return -EINVAL;
5123                 if (key.idx > 4)
5124                         return -EINVAL;
5125         } else {
5126                 key.p.key_len = 0;
5127                 key.p.key = NULL;
5128         }
5129
5130         if (key.idx >= 0) {
5131                 int i;
5132                 bool ok = false;
5133                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5134                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5135                                 ok = true;
5136                                 break;
5137                         }
5138                 }
5139                 if (!ok)
5140                         return -EINVAL;
5141         }
5142
5143         if (!rdev->ops->auth)
5144                 return -EOPNOTSUPP;
5145
5146         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5147             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5148                 return -EOPNOTSUPP;
5149
5150         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5151         chan = ieee80211_get_channel(&rdev->wiphy,
5152                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5153         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5154                 return -EINVAL;
5155
5156         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5157         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5158
5159         if (info->attrs[NL80211_ATTR_IE]) {
5160                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5161                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5162         }
5163
5164         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5165         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5166                 return -EINVAL;
5167
5168         if (auth_type == NL80211_AUTHTYPE_SAE &&
5169             !info->attrs[NL80211_ATTR_SAE_DATA])
5170                 return -EINVAL;
5171
5172         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5173                 if (auth_type != NL80211_AUTHTYPE_SAE)
5174                         return -EINVAL;
5175                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5176                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5177                 /* need to include at least Auth Transaction and Status Code */
5178                 if (sae_data_len < 4)
5179                         return -EINVAL;
5180         }
5181
5182         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5183
5184         /*
5185          * Since we no longer track auth state, ignore
5186          * requests to only change local state.
5187          */
5188         if (local_state_change)
5189                 return 0;
5190
5191         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5192                                   ssid, ssid_len, ie, ie_len,
5193                                   key.p.key, key.p.key_len, key.idx,
5194                                   sae_data, sae_data_len);
5195 }
5196
5197 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5198                                    struct genl_info *info,
5199                                    struct cfg80211_crypto_settings *settings,
5200                                    int cipher_limit)
5201 {
5202         memset(settings, 0, sizeof(*settings));
5203
5204         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5205
5206         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5207                 u16 proto;
5208                 proto = nla_get_u16(
5209                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5210                 settings->control_port_ethertype = cpu_to_be16(proto);
5211                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5212                     proto != ETH_P_PAE)
5213                         return -EINVAL;
5214                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5215                         settings->control_port_no_encrypt = true;
5216         } else
5217                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5218
5219         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5220                 void *data;
5221                 int len, i;
5222
5223                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5224                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5225                 settings->n_ciphers_pairwise = len / sizeof(u32);
5226
5227                 if (len % sizeof(u32))
5228                         return -EINVAL;
5229
5230                 if (settings->n_ciphers_pairwise > cipher_limit)
5231                         return -EINVAL;
5232
5233                 memcpy(settings->ciphers_pairwise, data, len);
5234
5235                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5236                         if (!cfg80211_supported_cipher_suite(
5237                                         &rdev->wiphy,
5238                                         settings->ciphers_pairwise[i]))
5239                                 return -EINVAL;
5240         }
5241
5242         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5243                 settings->cipher_group =
5244                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5245                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5246                                                      settings->cipher_group))
5247                         return -EINVAL;
5248         }
5249
5250         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5251                 settings->wpa_versions =
5252                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5253                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5254                         return -EINVAL;
5255         }
5256
5257         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5258                 void *data;
5259                 int len;
5260
5261                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5262                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5263                 settings->n_akm_suites = len / sizeof(u32);
5264
5265                 if (len % sizeof(u32))
5266                         return -EINVAL;
5267
5268                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5269                         return -EINVAL;
5270
5271                 memcpy(settings->akm_suites, data, len);
5272         }
5273
5274         return 0;
5275 }
5276
5277 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5278 {
5279         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5280         struct net_device *dev = info->user_ptr[1];
5281         struct cfg80211_crypto_settings crypto;
5282         struct ieee80211_channel *chan;
5283         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5284         int err, ssid_len, ie_len = 0;
5285         bool use_mfp = false;
5286         u32 flags = 0;
5287         struct ieee80211_ht_cap *ht_capa = NULL;
5288         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5289
5290         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5291                 return -EINVAL;
5292
5293         if (!info->attrs[NL80211_ATTR_MAC] ||
5294             !info->attrs[NL80211_ATTR_SSID] ||
5295             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5296                 return -EINVAL;
5297
5298         if (!rdev->ops->assoc)
5299                 return -EOPNOTSUPP;
5300
5301         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5303                 return -EOPNOTSUPP;
5304
5305         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5306
5307         chan = ieee80211_get_channel(&rdev->wiphy,
5308                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5309         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5310                 return -EINVAL;
5311
5312         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5313         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5314
5315         if (info->attrs[NL80211_ATTR_IE]) {
5316                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5317                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5318         }
5319
5320         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5321                 enum nl80211_mfp mfp =
5322                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5323                 if (mfp == NL80211_MFP_REQUIRED)
5324                         use_mfp = true;
5325                 else if (mfp != NL80211_MFP_NO)
5326                         return -EINVAL;
5327         }
5328
5329         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5330                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5331
5332         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5333                 flags |= ASSOC_REQ_DISABLE_HT;
5334
5335         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5336                 ht_capa_mask =
5337                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5338
5339         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5340                 if (!ht_capa_mask)
5341                         return -EINVAL;
5342                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5343         }
5344
5345         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5346         if (!err)
5347                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5348                                           ssid, ssid_len, ie, ie_len, use_mfp,
5349                                           &crypto, flags, ht_capa,
5350                                           ht_capa_mask);
5351
5352         return err;
5353 }
5354
5355 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5356 {
5357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5358         struct net_device *dev = info->user_ptr[1];
5359         const u8 *ie = NULL, *bssid;
5360         int ie_len = 0;
5361         u16 reason_code;
5362         bool local_state_change;
5363
5364         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5365                 return -EINVAL;
5366
5367         if (!info->attrs[NL80211_ATTR_MAC])
5368                 return -EINVAL;
5369
5370         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5371                 return -EINVAL;
5372
5373         if (!rdev->ops->deauth)
5374                 return -EOPNOTSUPP;
5375
5376         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5377             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5378                 return -EOPNOTSUPP;
5379
5380         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5381
5382         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5383         if (reason_code == 0) {
5384                 /* Reason Code 0 is reserved */
5385                 return -EINVAL;
5386         }
5387
5388         if (info->attrs[NL80211_ATTR_IE]) {
5389                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5390                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5391         }
5392
5393         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5394
5395         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5396                                     local_state_change);
5397 }
5398
5399 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5400 {
5401         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5402         struct net_device *dev = info->user_ptr[1];
5403         const u8 *ie = NULL, *bssid;
5404         int ie_len = 0;
5405         u16 reason_code;
5406         bool local_state_change;
5407
5408         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5409                 return -EINVAL;
5410
5411         if (!info->attrs[NL80211_ATTR_MAC])
5412                 return -EINVAL;
5413
5414         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5415                 return -EINVAL;
5416
5417         if (!rdev->ops->disassoc)
5418                 return -EOPNOTSUPP;
5419
5420         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5421             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5422                 return -EOPNOTSUPP;
5423
5424         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5425
5426         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5427         if (reason_code == 0) {
5428                 /* Reason Code 0 is reserved */
5429                 return -EINVAL;
5430         }
5431
5432         if (info->attrs[NL80211_ATTR_IE]) {
5433                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5434                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5435         }
5436
5437         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5438
5439         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5440                                       local_state_change);
5441 }
5442
5443 static bool
5444 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5445                          int mcast_rate[IEEE80211_NUM_BANDS],
5446                          int rateval)
5447 {
5448         struct wiphy *wiphy = &rdev->wiphy;
5449         bool found = false;
5450         int band, i;
5451
5452         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5453                 struct ieee80211_supported_band *sband;
5454
5455                 sband = wiphy->bands[band];
5456                 if (!sband)
5457                         continue;
5458
5459                 for (i = 0; i < sband->n_bitrates; i++) {
5460                         if (sband->bitrates[i].bitrate == rateval) {
5461                                 mcast_rate[band] = i + 1;
5462                                 found = true;
5463                                 break;
5464                         }
5465                 }
5466         }
5467
5468         return found;
5469 }
5470
5471 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5472 {
5473         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5474         struct net_device *dev = info->user_ptr[1];
5475         struct cfg80211_ibss_params ibss;
5476         struct wiphy *wiphy;
5477         struct cfg80211_cached_keys *connkeys = NULL;
5478         int err;
5479
5480         memset(&ibss, 0, sizeof(ibss));
5481
5482         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5483                 return -EINVAL;
5484
5485         if (!info->attrs[NL80211_ATTR_SSID] ||
5486             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5487                 return -EINVAL;
5488
5489         ibss.beacon_interval = 100;
5490
5491         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5492                 ibss.beacon_interval =
5493                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5494                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5495                         return -EINVAL;
5496         }
5497
5498         if (!rdev->ops->join_ibss)
5499                 return -EOPNOTSUPP;
5500
5501         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5502                 return -EOPNOTSUPP;
5503
5504         wiphy = &rdev->wiphy;
5505
5506         if (info->attrs[NL80211_ATTR_MAC]) {
5507                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5508
5509                 if (!is_valid_ether_addr(ibss.bssid))
5510                         return -EINVAL;
5511         }
5512         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5513         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5514
5515         if (info->attrs[NL80211_ATTR_IE]) {
5516                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5517                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5518         }
5519
5520         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5521         if (err)
5522                 return err;
5523
5524         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5525                 return -EINVAL;
5526
5527         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5528                 return -EINVAL;
5529         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5530             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5531                 return -EINVAL;
5532
5533         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5534         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5535
5536         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5537                 u8 *rates =
5538                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5539                 int n_rates =
5540                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5541                 struct ieee80211_supported_band *sband =
5542                         wiphy->bands[ibss.chandef.chan->band];
5543
5544                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5545                                              &ibss.basic_rates);
5546                 if (err)
5547                         return err;
5548         }
5549
5550         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5551             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5552                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5553                 return -EINVAL;
5554
5555         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5556                 bool no_ht = false;
5557
5558                 connkeys = nl80211_parse_connkeys(rdev,
5559                                           info->attrs[NL80211_ATTR_KEYS],
5560                                           &no_ht);
5561                 if (IS_ERR(connkeys))
5562                         return PTR_ERR(connkeys);
5563
5564                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5565                     no_ht) {
5566                         kfree(connkeys);
5567                         return -EINVAL;
5568                 }
5569         }
5570
5571         ibss.control_port =
5572                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5573
5574         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5575         if (err)
5576                 kfree(connkeys);
5577         return err;
5578 }
5579
5580 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5581 {
5582         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5583         struct net_device *dev = info->user_ptr[1];
5584
5585         if (!rdev->ops->leave_ibss)
5586                 return -EOPNOTSUPP;
5587
5588         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5589                 return -EOPNOTSUPP;
5590
5591         return cfg80211_leave_ibss(rdev, dev, false);
5592 }
5593
5594 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5595 {
5596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5597         struct net_device *dev = info->user_ptr[1];
5598         int mcast_rate[IEEE80211_NUM_BANDS];
5599         u32 nla_rate;
5600         int err;
5601
5602         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5603             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5604                 return -EOPNOTSUPP;
5605
5606         if (!rdev->ops->set_mcast_rate)
5607                 return -EOPNOTSUPP;
5608
5609         memset(mcast_rate, 0, sizeof(mcast_rate));
5610
5611         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5612                 return -EINVAL;
5613
5614         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5615         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5616                 return -EINVAL;
5617
5618         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5619
5620         return err;
5621 }
5622
5623
5624 #ifdef CONFIG_NL80211_TESTMODE
5625 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5626         .name = "testmode",
5627 };
5628
5629 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5630 {
5631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5632         int err;
5633
5634         if (!info->attrs[NL80211_ATTR_TESTDATA])
5635                 return -EINVAL;
5636
5637         err = -EOPNOTSUPP;
5638         if (rdev->ops->testmode_cmd) {
5639                 rdev->testmode_info = info;
5640                 err = rdev_testmode_cmd(rdev,
5641                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5642                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5643                 rdev->testmode_info = NULL;
5644         }
5645
5646         return err;
5647 }
5648
5649 static int nl80211_testmode_dump(struct sk_buff *skb,
5650                                  struct netlink_callback *cb)
5651 {
5652         struct cfg80211_registered_device *rdev;
5653         int err;
5654         long phy_idx;
5655         void *data = NULL;
5656         int data_len = 0;
5657
5658         if (cb->args[0]) {
5659                 /*
5660                  * 0 is a valid index, but not valid for args[0],
5661                  * so we need to offset by 1.
5662                  */
5663                 phy_idx = cb->args[0] - 1;
5664         } else {
5665                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5666                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5667                                   nl80211_policy);
5668                 if (err)
5669                         return err;
5670
5671                 mutex_lock(&cfg80211_mutex);
5672                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5673                                                   nl80211_fam.attrbuf);
5674                 if (IS_ERR(rdev)) {
5675                         mutex_unlock(&cfg80211_mutex);
5676                         return PTR_ERR(rdev);
5677                 }
5678                 phy_idx = rdev->wiphy_idx;
5679                 rdev = NULL;
5680                 mutex_unlock(&cfg80211_mutex);
5681
5682                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5683                         cb->args[1] =
5684                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5685         }
5686
5687         if (cb->args[1]) {
5688                 data = nla_data((void *)cb->args[1]);
5689                 data_len = nla_len((void *)cb->args[1]);
5690         }
5691
5692         mutex_lock(&cfg80211_mutex);
5693         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5694         if (!rdev) {
5695                 mutex_unlock(&cfg80211_mutex);
5696                 return -ENOENT;
5697         }
5698         cfg80211_lock_rdev(rdev);
5699         mutex_unlock(&cfg80211_mutex);
5700
5701         if (!rdev->ops->testmode_dump) {
5702                 err = -EOPNOTSUPP;
5703                 goto out_err;
5704         }
5705
5706         while (1) {
5707                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
5708                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5709                                            NL80211_CMD_TESTMODE);
5710                 struct nlattr *tmdata;
5711
5712                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5713                         genlmsg_cancel(skb, hdr);
5714                         break;
5715                 }
5716
5717                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5718                 if (!tmdata) {
5719                         genlmsg_cancel(skb, hdr);
5720                         break;
5721                 }
5722                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
5723                 nla_nest_end(skb, tmdata);
5724
5725                 if (err == -ENOBUFS || err == -ENOENT) {
5726                         genlmsg_cancel(skb, hdr);
5727                         break;
5728                 } else if (err) {
5729                         genlmsg_cancel(skb, hdr);
5730                         goto out_err;
5731                 }
5732
5733                 genlmsg_end(skb, hdr);
5734         }
5735
5736         err = skb->len;
5737         /* see above */
5738         cb->args[0] = phy_idx + 1;
5739  out_err:
5740         cfg80211_unlock_rdev(rdev);
5741         return err;
5742 }
5743
5744 static struct sk_buff *
5745 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5746                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
5747 {
5748         struct sk_buff *skb;
5749         void *hdr;
5750         struct nlattr *data;
5751
5752         skb = nlmsg_new(approxlen + 100, gfp);
5753         if (!skb)
5754                 return NULL;
5755
5756         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
5757         if (!hdr) {
5758                 kfree_skb(skb);
5759                 return NULL;
5760         }
5761
5762         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5763                 goto nla_put_failure;
5764         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5765
5766         ((void **)skb->cb)[0] = rdev;
5767         ((void **)skb->cb)[1] = hdr;
5768         ((void **)skb->cb)[2] = data;
5769
5770         return skb;
5771
5772  nla_put_failure:
5773         kfree_skb(skb);
5774         return NULL;
5775 }
5776
5777 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5778                                                   int approxlen)
5779 {
5780         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5781
5782         if (WARN_ON(!rdev->testmode_info))
5783                 return NULL;
5784
5785         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5786                                 rdev->testmode_info->snd_portid,
5787                                 rdev->testmode_info->snd_seq,
5788                                 GFP_KERNEL);
5789 }
5790 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5791
5792 int cfg80211_testmode_reply(struct sk_buff *skb)
5793 {
5794         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5795         void *hdr = ((void **)skb->cb)[1];
5796         struct nlattr *data = ((void **)skb->cb)[2];
5797
5798         if (WARN_ON(!rdev->testmode_info)) {
5799                 kfree_skb(skb);
5800                 return -EINVAL;
5801         }
5802
5803         nla_nest_end(skb, data);
5804         genlmsg_end(skb, hdr);
5805         return genlmsg_reply(skb, rdev->testmode_info);
5806 }
5807 EXPORT_SYMBOL(cfg80211_testmode_reply);
5808
5809 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5810                                                   int approxlen, gfp_t gfp)
5811 {
5812         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5813
5814         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5815 }
5816 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5817
5818 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5819 {
5820         void *hdr = ((void **)skb->cb)[1];
5821         struct nlattr *data = ((void **)skb->cb)[2];
5822
5823         nla_nest_end(skb, data);
5824         genlmsg_end(skb, hdr);
5825         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5826 }
5827 EXPORT_SYMBOL(cfg80211_testmode_event);
5828 #endif
5829
5830 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5831 {
5832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5833         struct net_device *dev = info->user_ptr[1];
5834         struct cfg80211_connect_params connect;
5835         struct wiphy *wiphy;
5836         struct cfg80211_cached_keys *connkeys = NULL;
5837         int err;
5838
5839         memset(&connect, 0, sizeof(connect));
5840
5841         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5842                 return -EINVAL;
5843
5844         if (!info->attrs[NL80211_ATTR_SSID] ||
5845             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5846                 return -EINVAL;
5847
5848         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5849                 connect.auth_type =
5850                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5851                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
5852                                              NL80211_CMD_CONNECT))
5853                         return -EINVAL;
5854         } else
5855                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5856
5857         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5858
5859         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5860                                       NL80211_MAX_NR_CIPHER_SUITES);
5861         if (err)
5862                 return err;
5863
5864         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5865             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5866                 return -EOPNOTSUPP;
5867
5868         wiphy = &rdev->wiphy;
5869
5870         connect.bg_scan_period = -1;
5871         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5872                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5873                 connect.bg_scan_period =
5874                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5875         }
5876
5877         if (info->attrs[NL80211_ATTR_MAC])
5878                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5879         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5880         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5881
5882         if (info->attrs[NL80211_ATTR_IE]) {
5883                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5884                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5885         }
5886
5887         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5888                 connect.channel =
5889                         ieee80211_get_channel(wiphy,
5890                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5891                 if (!connect.channel ||
5892                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5893                         return -EINVAL;
5894         }
5895
5896         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5897                 connkeys = nl80211_parse_connkeys(rdev,
5898                                           info->attrs[NL80211_ATTR_KEYS], NULL);
5899                 if (IS_ERR(connkeys))
5900                         return PTR_ERR(connkeys);
5901         }
5902
5903         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5904                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5905
5906         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5907                 memcpy(&connect.ht_capa_mask,
5908                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5909                        sizeof(connect.ht_capa_mask));
5910
5911         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5912                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
5913                         kfree(connkeys);
5914                         return -EINVAL;
5915                 }
5916                 memcpy(&connect.ht_capa,
5917                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5918                        sizeof(connect.ht_capa));
5919         }
5920
5921         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5922         if (err)
5923                 kfree(connkeys);
5924         return err;
5925 }
5926
5927 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5928 {
5929         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5930         struct net_device *dev = info->user_ptr[1];
5931         u16 reason;
5932
5933         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5934                 reason = WLAN_REASON_DEAUTH_LEAVING;
5935         else
5936                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5937
5938         if (reason == 0)
5939                 return -EINVAL;
5940
5941         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5942             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5943                 return -EOPNOTSUPP;
5944
5945         return cfg80211_disconnect(rdev, dev, reason, true);
5946 }
5947
5948 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5949 {
5950         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5951         struct net *net;
5952         int err;
5953         u32 pid;
5954
5955         if (!info->attrs[NL80211_ATTR_PID])
5956                 return -EINVAL;
5957
5958         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5959
5960         net = get_net_ns_by_pid(pid);
5961         if (IS_ERR(net))
5962                 return PTR_ERR(net);
5963
5964         err = 0;
5965
5966         /* check if anything to do */
5967         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5968                 err = cfg80211_switch_netns(rdev, net);
5969
5970         put_net(net);
5971         return err;
5972 }
5973
5974 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5975 {
5976         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5977         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5978                         struct cfg80211_pmksa *pmksa) = NULL;
5979         struct net_device *dev = info->user_ptr[1];
5980         struct cfg80211_pmksa pmksa;
5981
5982         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5983
5984         if (!info->attrs[NL80211_ATTR_MAC])
5985                 return -EINVAL;
5986
5987         if (!info->attrs[NL80211_ATTR_PMKID])
5988                 return -EINVAL;
5989
5990         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5991         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5992
5993         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5994             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5995                 return -EOPNOTSUPP;
5996
5997         switch (info->genlhdr->cmd) {
5998         case NL80211_CMD_SET_PMKSA:
5999                 rdev_ops = rdev->ops->set_pmksa;
6000                 break;
6001         case NL80211_CMD_DEL_PMKSA:
6002                 rdev_ops = rdev->ops->del_pmksa;
6003                 break;
6004         default:
6005                 WARN_ON(1);
6006                 break;
6007         }
6008
6009         if (!rdev_ops)
6010                 return -EOPNOTSUPP;
6011
6012         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6013 }
6014
6015 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6016 {
6017         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6018         struct net_device *dev = info->user_ptr[1];
6019
6020         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6021             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6022                 return -EOPNOTSUPP;
6023
6024         if (!rdev->ops->flush_pmksa)
6025                 return -EOPNOTSUPP;
6026
6027         return rdev_flush_pmksa(rdev, dev);
6028 }
6029
6030 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6031 {
6032         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6033         struct net_device *dev = info->user_ptr[1];
6034         u8 action_code, dialog_token;
6035         u16 status_code;
6036         u8 *peer;
6037
6038         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6039             !rdev->ops->tdls_mgmt)
6040                 return -EOPNOTSUPP;
6041
6042         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6043             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6044             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6045             !info->attrs[NL80211_ATTR_IE] ||
6046             !info->attrs[NL80211_ATTR_MAC])
6047                 return -EINVAL;
6048
6049         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6050         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6051         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6052         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6053
6054         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6055                               dialog_token, status_code,
6056                               nla_data(info->attrs[NL80211_ATTR_IE]),
6057                               nla_len(info->attrs[NL80211_ATTR_IE]));
6058 }
6059
6060 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6061 {
6062         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6063         struct net_device *dev = info->user_ptr[1];
6064         enum nl80211_tdls_operation operation;
6065         u8 *peer;
6066
6067         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6068             !rdev->ops->tdls_oper)
6069                 return -EOPNOTSUPP;
6070
6071         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6072             !info->attrs[NL80211_ATTR_MAC])
6073                 return -EINVAL;
6074
6075         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6076         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6077
6078         return rdev_tdls_oper(rdev, dev, peer, operation);
6079 }
6080
6081 static int nl80211_remain_on_channel(struct sk_buff *skb,
6082                                      struct genl_info *info)
6083 {
6084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6085         struct wireless_dev *wdev = info->user_ptr[1];
6086         struct cfg80211_chan_def chandef;
6087         struct sk_buff *msg;
6088         void *hdr;
6089         u64 cookie;
6090         u32 duration;
6091         int err;
6092
6093         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6094             !info->attrs[NL80211_ATTR_DURATION])
6095                 return -EINVAL;
6096
6097         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6098
6099         if (!rdev->ops->remain_on_channel ||
6100             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6101                 return -EOPNOTSUPP;
6102
6103         /*
6104          * We should be on that channel for at least a minimum amount of
6105          * time (10ms) but no longer than the driver supports.
6106          */
6107         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6108             duration > rdev->wiphy.max_remain_on_channel_duration)
6109                 return -EINVAL;
6110
6111         err = nl80211_parse_chandef(rdev, info, &chandef);
6112         if (err)
6113                 return err;
6114
6115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6116         if (!msg)
6117                 return -ENOMEM;
6118
6119         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6120                              NL80211_CMD_REMAIN_ON_CHANNEL);
6121
6122         if (IS_ERR(hdr)) {
6123                 err = PTR_ERR(hdr);
6124                 goto free_msg;
6125         }
6126
6127         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6128                                      duration, &cookie);
6129
6130         if (err)
6131                 goto free_msg;
6132
6133         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6134                 goto nla_put_failure;
6135
6136         genlmsg_end(msg, hdr);
6137
6138         return genlmsg_reply(msg, info);
6139
6140  nla_put_failure:
6141         err = -ENOBUFS;
6142  free_msg:
6143         nlmsg_free(msg);
6144         return err;
6145 }
6146
6147 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6148                                             struct genl_info *info)
6149 {
6150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6151         struct wireless_dev *wdev = info->user_ptr[1];
6152         u64 cookie;
6153
6154         if (!info->attrs[NL80211_ATTR_COOKIE])
6155                 return -EINVAL;
6156
6157         if (!rdev->ops->cancel_remain_on_channel)
6158                 return -EOPNOTSUPP;
6159
6160         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6161
6162         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6163 }
6164
6165 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6166                            u8 *rates, u8 rates_len)
6167 {
6168         u8 i;
6169         u32 mask = 0;
6170
6171         for (i = 0; i < rates_len; i++) {
6172                 int rate = (rates[i] & 0x7f) * 5;
6173                 int ridx;
6174                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6175                         struct ieee80211_rate *srate =
6176                                 &sband->bitrates[ridx];
6177                         if (rate == srate->bitrate) {
6178                                 mask |= 1 << ridx;
6179                                 break;
6180                         }
6181                 }
6182                 if (ridx == sband->n_bitrates)
6183                         return 0; /* rate not found */
6184         }
6185
6186         return mask;
6187 }
6188
6189 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6190                                u8 *rates, u8 rates_len,
6191                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6192 {
6193         u8 i;
6194
6195         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6196
6197         for (i = 0; i < rates_len; i++) {
6198                 int ridx, rbit;
6199
6200                 ridx = rates[i] / 8;
6201                 rbit = BIT(rates[i] % 8);
6202
6203                 /* check validity */
6204                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6205                         return false;
6206
6207                 /* check availability */
6208                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6209                         mcs[ridx] |= rbit;
6210                 else
6211                         return false;
6212         }
6213
6214         return true;
6215 }
6216
6217 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6218         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6219                                     .len = NL80211_MAX_SUPP_RATES },
6220         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6221                                  .len = NL80211_MAX_SUPP_HT_RATES },
6222 };
6223
6224 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6225                                        struct genl_info *info)
6226 {
6227         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6229         struct cfg80211_bitrate_mask mask;
6230         int rem, i;
6231         struct net_device *dev = info->user_ptr[1];
6232         struct nlattr *tx_rates;
6233         struct ieee80211_supported_band *sband;
6234
6235         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6236                 return -EINVAL;
6237
6238         if (!rdev->ops->set_bitrate_mask)
6239                 return -EOPNOTSUPP;
6240
6241         memset(&mask, 0, sizeof(mask));
6242         /* Default to all rates enabled */
6243         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6244                 sband = rdev->wiphy.bands[i];
6245                 mask.control[i].legacy =
6246                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6247                 if (sband)
6248                         memcpy(mask.control[i].mcs,
6249                                sband->ht_cap.mcs.rx_mask,
6250                                sizeof(mask.control[i].mcs));
6251                 else
6252                         memset(mask.control[i].mcs, 0,
6253                                sizeof(mask.control[i].mcs));
6254         }
6255
6256         /*
6257          * The nested attribute uses enum nl80211_band as the index. This maps
6258          * directly to the enum ieee80211_band values used in cfg80211.
6259          */
6260         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6261         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6262         {
6263                 enum ieee80211_band band = nla_type(tx_rates);
6264                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6265                         return -EINVAL;
6266                 sband = rdev->wiphy.bands[band];
6267                 if (sband == NULL)
6268                         return -EINVAL;
6269                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6270                           nla_len(tx_rates), nl80211_txattr_policy);
6271                 if (tb[NL80211_TXRATE_LEGACY]) {
6272                         mask.control[band].legacy = rateset_to_mask(
6273                                 sband,
6274                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6275                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6276                         if ((mask.control[band].legacy == 0) &&
6277                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6278                                 return -EINVAL;
6279                 }
6280                 if (tb[NL80211_TXRATE_MCS]) {
6281                         if (!ht_rateset_to_mask(
6282                                         sband,
6283                                         nla_data(tb[NL80211_TXRATE_MCS]),
6284                                         nla_len(tb[NL80211_TXRATE_MCS]),
6285                                         mask.control[band].mcs))
6286                                 return -EINVAL;
6287                 }
6288
6289                 if (mask.control[band].legacy == 0) {
6290                         /* don't allow empty legacy rates if HT
6291                          * is not even supported. */
6292                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6293                                 return -EINVAL;
6294
6295                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6296                                 if (mask.control[band].mcs[i])
6297                                         break;
6298
6299                         /* legacy and mcs rates may not be both empty */
6300                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6301                                 return -EINVAL;
6302                 }
6303         }
6304
6305         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6306 }
6307
6308 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6309 {
6310         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6311         struct wireless_dev *wdev = info->user_ptr[1];
6312         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6313
6314         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6315                 return -EINVAL;
6316
6317         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6318                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6319
6320         switch (wdev->iftype) {
6321         case NL80211_IFTYPE_STATION:
6322         case NL80211_IFTYPE_ADHOC:
6323         case NL80211_IFTYPE_P2P_CLIENT:
6324         case NL80211_IFTYPE_AP:
6325         case NL80211_IFTYPE_AP_VLAN:
6326         case NL80211_IFTYPE_MESH_POINT:
6327         case NL80211_IFTYPE_P2P_GO:
6328         case NL80211_IFTYPE_P2P_DEVICE:
6329                 break;
6330         default:
6331                 return -EOPNOTSUPP;
6332         }
6333
6334         /* not much point in registering if we can't reply */
6335         if (!rdev->ops->mgmt_tx)
6336                 return -EOPNOTSUPP;
6337
6338         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6339                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6340                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6341 }
6342
6343 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6344 {
6345         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6346         struct wireless_dev *wdev = info->user_ptr[1];
6347         struct cfg80211_chan_def chandef;
6348         int err;
6349         void *hdr = NULL;
6350         u64 cookie;
6351         struct sk_buff *msg = NULL;
6352         unsigned int wait = 0;
6353         bool offchan, no_cck, dont_wait_for_ack;
6354
6355         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6356
6357         if (!info->attrs[NL80211_ATTR_FRAME])
6358                 return -EINVAL;
6359
6360         if (!rdev->ops->mgmt_tx)
6361                 return -EOPNOTSUPP;
6362
6363         switch (wdev->iftype) {
6364         case NL80211_IFTYPE_STATION:
6365         case NL80211_IFTYPE_ADHOC:
6366         case NL80211_IFTYPE_P2P_CLIENT:
6367         case NL80211_IFTYPE_AP:
6368         case NL80211_IFTYPE_AP_VLAN:
6369         case NL80211_IFTYPE_MESH_POINT:
6370         case NL80211_IFTYPE_P2P_GO:
6371         case NL80211_IFTYPE_P2P_DEVICE:
6372                 break;
6373         default:
6374                 return -EOPNOTSUPP;
6375         }
6376
6377         if (info->attrs[NL80211_ATTR_DURATION]) {
6378                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6379                         return -EINVAL;
6380                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6381
6382                 /*
6383                  * We should wait on the channel for at least a minimum amount
6384                  * of time (10ms) but no longer than the driver supports.
6385                  */
6386                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6387                     wait > rdev->wiphy.max_remain_on_channel_duration)
6388                         return -EINVAL;
6389
6390         }
6391
6392         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6393
6394         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6395                 return -EINVAL;
6396
6397         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6398
6399         err = nl80211_parse_chandef(rdev, info, &chandef);
6400         if (err)
6401                 return err;
6402
6403         if (!dont_wait_for_ack) {
6404                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6405                 if (!msg)
6406                         return -ENOMEM;
6407
6408                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6409                                      NL80211_CMD_FRAME);
6410
6411                 if (IS_ERR(hdr)) {
6412                         err = PTR_ERR(hdr);
6413                         goto free_msg;
6414                 }
6415         }
6416
6417         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6418                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6419                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6420                                     no_cck, dont_wait_for_ack, &cookie);
6421         if (err)
6422                 goto free_msg;
6423
6424         if (msg) {
6425                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6426                         goto nla_put_failure;
6427
6428                 genlmsg_end(msg, hdr);
6429                 return genlmsg_reply(msg, info);
6430         }
6431
6432         return 0;
6433
6434  nla_put_failure:
6435         err = -ENOBUFS;
6436  free_msg:
6437         nlmsg_free(msg);
6438         return err;
6439 }
6440
6441 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6442 {
6443         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6444         struct wireless_dev *wdev = info->user_ptr[1];
6445         u64 cookie;
6446
6447         if (!info->attrs[NL80211_ATTR_COOKIE])
6448                 return -EINVAL;
6449
6450         if (!rdev->ops->mgmt_tx_cancel_wait)
6451                 return -EOPNOTSUPP;
6452
6453         switch (wdev->iftype) {
6454         case NL80211_IFTYPE_STATION:
6455         case NL80211_IFTYPE_ADHOC:
6456         case NL80211_IFTYPE_P2P_CLIENT:
6457         case NL80211_IFTYPE_AP:
6458         case NL80211_IFTYPE_AP_VLAN:
6459         case NL80211_IFTYPE_P2P_GO:
6460         case NL80211_IFTYPE_P2P_DEVICE:
6461                 break;
6462         default:
6463                 return -EOPNOTSUPP;
6464         }
6465
6466         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6467
6468         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6469 }
6470
6471 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6472 {
6473         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6474         struct wireless_dev *wdev;
6475         struct net_device *dev = info->user_ptr[1];
6476         u8 ps_state;
6477         bool state;
6478         int err;
6479
6480         if (!info->attrs[NL80211_ATTR_PS_STATE])
6481                 return -EINVAL;
6482
6483         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6484
6485         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6486                 return -EINVAL;
6487
6488         wdev = dev->ieee80211_ptr;
6489
6490         if (!rdev->ops->set_power_mgmt)
6491                 return -EOPNOTSUPP;
6492
6493         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6494
6495         if (state == wdev->ps)
6496                 return 0;
6497
6498         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6499         if (!err)
6500                 wdev->ps = state;
6501         return err;
6502 }
6503
6504 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6505 {
6506         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6507         enum nl80211_ps_state ps_state;
6508         struct wireless_dev *wdev;
6509         struct net_device *dev = info->user_ptr[1];
6510         struct sk_buff *msg;
6511         void *hdr;
6512         int err;
6513
6514         wdev = dev->ieee80211_ptr;
6515
6516         if (!rdev->ops->set_power_mgmt)
6517                 return -EOPNOTSUPP;
6518
6519         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6520         if (!msg)
6521                 return -ENOMEM;
6522
6523         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6524                              NL80211_CMD_GET_POWER_SAVE);
6525         if (!hdr) {
6526                 err = -ENOBUFS;
6527                 goto free_msg;
6528         }
6529
6530         if (wdev->ps)
6531                 ps_state = NL80211_PS_ENABLED;
6532         else
6533                 ps_state = NL80211_PS_DISABLED;
6534
6535         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6536                 goto nla_put_failure;
6537
6538         genlmsg_end(msg, hdr);
6539         return genlmsg_reply(msg, info);
6540
6541  nla_put_failure:
6542         err = -ENOBUFS;
6543  free_msg:
6544         nlmsg_free(msg);
6545         return err;
6546 }
6547
6548 static struct nla_policy
6549 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6550         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6551         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6552         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6553         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6554         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6555         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6556 };
6557
6558 static int nl80211_set_cqm_txe(struct genl_info *info,
6559                                u32 rate, u32 pkts, u32 intvl)
6560 {
6561         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6562         struct wireless_dev *wdev;
6563         struct net_device *dev = info->user_ptr[1];
6564
6565         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6566                 return -EINVAL;
6567
6568         wdev = dev->ieee80211_ptr;
6569
6570         if (!rdev->ops->set_cqm_txe_config)
6571                 return -EOPNOTSUPP;
6572
6573         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6574             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6575                 return -EOPNOTSUPP;
6576
6577         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6578 }
6579
6580 static int nl80211_set_cqm_rssi(struct genl_info *info,
6581                                 s32 threshold, u32 hysteresis)
6582 {
6583         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6584         struct wireless_dev *wdev;
6585         struct net_device *dev = info->user_ptr[1];
6586
6587         if (threshold > 0)
6588                 return -EINVAL;
6589
6590         wdev = dev->ieee80211_ptr;
6591
6592         if (!rdev->ops->set_cqm_rssi_config)
6593                 return -EOPNOTSUPP;
6594
6595         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6596             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6597                 return -EOPNOTSUPP;
6598
6599         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6600 }
6601
6602 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6603 {
6604         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6605         struct nlattr *cqm;
6606         int err;
6607
6608         cqm = info->attrs[NL80211_ATTR_CQM];
6609         if (!cqm) {
6610                 err = -EINVAL;
6611                 goto out;
6612         }
6613
6614         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6615                                nl80211_attr_cqm_policy);
6616         if (err)
6617                 goto out;
6618
6619         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6620             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6621                 s32 threshold;
6622                 u32 hysteresis;
6623                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6624                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6625                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6626         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
6627                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
6628                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
6629                 u32 rate, pkts, intvl;
6630                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
6631                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
6632                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
6633                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
6634         } else
6635                 err = -EINVAL;
6636
6637 out:
6638         return err;
6639 }
6640
6641 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6642 {
6643         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6644         struct net_device *dev = info->user_ptr[1];
6645         struct mesh_config cfg;
6646         struct mesh_setup setup;
6647         int err;
6648
6649         /* start with default */
6650         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6651         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6652
6653         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6654                 /* and parse parameters if given */
6655                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6656                 if (err)
6657                         return err;
6658         }
6659
6660         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6661             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6662                 return -EINVAL;
6663
6664         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6665         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6666
6667         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6668             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6669                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6670                         return -EINVAL;
6671
6672         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6673                 setup.beacon_interval =
6674                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6675                 if (setup.beacon_interval < 10 ||
6676                     setup.beacon_interval > 10000)
6677                         return -EINVAL;
6678         }
6679
6680         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
6681                 setup.dtim_period =
6682                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
6683                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
6684                         return -EINVAL;
6685         }
6686
6687         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6688                 /* parse additional setup parameters if given */
6689                 err = nl80211_parse_mesh_setup(info, &setup);
6690                 if (err)
6691                         return err;
6692         }
6693
6694         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6695                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
6696                 if (err)
6697                         return err;
6698         } else {
6699                 /* cfg80211_join_mesh() will sort it out */
6700                 setup.chandef.chan = NULL;
6701         }
6702
6703         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6704 }
6705
6706 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6707 {
6708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6709         struct net_device *dev = info->user_ptr[1];
6710
6711         return cfg80211_leave_mesh(rdev, dev);
6712 }
6713
6714 #ifdef CONFIG_PM
6715 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6716 {
6717         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6718         struct sk_buff *msg;
6719         void *hdr;
6720
6721         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6722                 return -EOPNOTSUPP;
6723
6724         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6725         if (!msg)
6726                 return -ENOMEM;
6727
6728         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6729                              NL80211_CMD_GET_WOWLAN);
6730         if (!hdr)
6731                 goto nla_put_failure;
6732
6733         if (rdev->wowlan) {
6734                 struct nlattr *nl_wowlan;
6735
6736                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6737                 if (!nl_wowlan)
6738                         goto nla_put_failure;
6739
6740                 if ((rdev->wowlan->any &&
6741                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6742                     (rdev->wowlan->disconnect &&
6743                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6744                     (rdev->wowlan->magic_pkt &&
6745                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6746                     (rdev->wowlan->gtk_rekey_failure &&
6747                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6748                     (rdev->wowlan->eap_identity_req &&
6749                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6750                     (rdev->wowlan->four_way_handshake &&
6751                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6752                     (rdev->wowlan->rfkill_release &&
6753                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6754                         goto nla_put_failure;
6755                 if (rdev->wowlan->n_patterns) {
6756                         struct nlattr *nl_pats, *nl_pat;
6757                         int i, pat_len;
6758
6759                         nl_pats = nla_nest_start(msg,
6760                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6761                         if (!nl_pats)
6762                                 goto nla_put_failure;
6763
6764                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6765                                 nl_pat = nla_nest_start(msg, i + 1);
6766                                 if (!nl_pat)
6767                                         goto nla_put_failure;
6768                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6769                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6770                                             DIV_ROUND_UP(pat_len, 8),
6771                                             rdev->wowlan->patterns[i].mask) ||
6772                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6773                                             pat_len,
6774                                             rdev->wowlan->patterns[i].pattern))
6775                                         goto nla_put_failure;
6776                                 nla_nest_end(msg, nl_pat);
6777                         }
6778                         nla_nest_end(msg, nl_pats);
6779                 }
6780
6781                 nla_nest_end(msg, nl_wowlan);
6782         }
6783
6784         genlmsg_end(msg, hdr);
6785         return genlmsg_reply(msg, info);
6786
6787 nla_put_failure:
6788         nlmsg_free(msg);
6789         return -ENOBUFS;
6790 }
6791
6792 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6793 {
6794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6795         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6796         struct cfg80211_wowlan new_triggers = {};
6797         struct cfg80211_wowlan *ntrig;
6798         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6799         int err, i;
6800         bool prev_enabled = rdev->wowlan;
6801
6802         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6803                 return -EOPNOTSUPP;
6804
6805         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
6806                 cfg80211_rdev_free_wowlan(rdev);
6807                 rdev->wowlan = NULL;
6808                 goto set_wakeup;
6809         }
6810
6811         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6812                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6813                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6814                         nl80211_wowlan_policy);
6815         if (err)
6816                 return err;
6817
6818         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6819                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6820                         return -EINVAL;
6821                 new_triggers.any = true;
6822         }
6823
6824         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6825                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6826                         return -EINVAL;
6827                 new_triggers.disconnect = true;
6828         }
6829
6830         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6831                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6832                         return -EINVAL;
6833                 new_triggers.magic_pkt = true;
6834         }
6835
6836         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6837                 return -EINVAL;
6838
6839         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6840                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6841                         return -EINVAL;
6842                 new_triggers.gtk_rekey_failure = true;
6843         }
6844
6845         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6846                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6847                         return -EINVAL;
6848                 new_triggers.eap_identity_req = true;
6849         }
6850
6851         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6852                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6853                         return -EINVAL;
6854                 new_triggers.four_way_handshake = true;
6855         }
6856
6857         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6858                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6859                         return -EINVAL;
6860                 new_triggers.rfkill_release = true;
6861         }
6862
6863         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6864                 struct nlattr *pat;
6865                 int n_patterns = 0;
6866                 int rem, pat_len, mask_len;
6867                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6868
6869                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6870                                     rem)
6871                         n_patterns++;
6872                 if (n_patterns > wowlan->n_patterns)
6873                         return -EINVAL;
6874
6875                 new_triggers.patterns = kcalloc(n_patterns,
6876                                                 sizeof(new_triggers.patterns[0]),
6877                                                 GFP_KERNEL);
6878                 if (!new_triggers.patterns)
6879                         return -ENOMEM;
6880
6881                 new_triggers.n_patterns = n_patterns;
6882                 i = 0;
6883
6884                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6885                                     rem) {
6886                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6887                                   nla_data(pat), nla_len(pat), NULL);
6888                         err = -EINVAL;
6889                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6890                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6891                                 goto error;
6892                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6893                         mask_len = DIV_ROUND_UP(pat_len, 8);
6894                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6895                             mask_len)
6896                                 goto error;
6897                         if (pat_len > wowlan->pattern_max_len ||
6898                             pat_len < wowlan->pattern_min_len)
6899                                 goto error;
6900
6901                         new_triggers.patterns[i].mask =
6902                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6903                         if (!new_triggers.patterns[i].mask) {
6904                                 err = -ENOMEM;
6905                                 goto error;
6906                         }
6907                         new_triggers.patterns[i].pattern =
6908                                 new_triggers.patterns[i].mask + mask_len;
6909                         memcpy(new_triggers.patterns[i].mask,
6910                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6911                                mask_len);
6912                         new_triggers.patterns[i].pattern_len = pat_len;
6913                         memcpy(new_triggers.patterns[i].pattern,
6914                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6915                                pat_len);
6916                         i++;
6917                 }
6918         }
6919
6920         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
6921         if (!ntrig) {
6922                 err = -ENOMEM;
6923                 goto error;
6924         }
6925         cfg80211_rdev_free_wowlan(rdev);
6926         rdev->wowlan = ntrig;
6927
6928  set_wakeup:
6929         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6930                 rdev_set_wakeup(rdev, rdev->wowlan);
6931
6932         return 0;
6933  error:
6934         for (i = 0; i < new_triggers.n_patterns; i++)
6935                 kfree(new_triggers.patterns[i].mask);
6936         kfree(new_triggers.patterns);
6937         return err;
6938 }
6939 #endif
6940
6941 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6942 {
6943         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6944         struct net_device *dev = info->user_ptr[1];
6945         struct wireless_dev *wdev = dev->ieee80211_ptr;
6946         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6947         struct cfg80211_gtk_rekey_data rekey_data;
6948         int err;
6949
6950         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6951                 return -EINVAL;
6952
6953         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6954                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6955                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6956                         nl80211_rekey_policy);
6957         if (err)
6958                 return err;
6959
6960         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6961                 return -ERANGE;
6962         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6963                 return -ERANGE;
6964         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6965                 return -ERANGE;
6966
6967         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6968                NL80211_KEK_LEN);
6969         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6970                NL80211_KCK_LEN);
6971         memcpy(rekey_data.replay_ctr,
6972                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6973                NL80211_REPLAY_CTR_LEN);
6974
6975         wdev_lock(wdev);
6976         if (!wdev->current_bss) {
6977                 err = -ENOTCONN;
6978                 goto out;
6979         }
6980
6981         if (!rdev->ops->set_rekey_data) {
6982                 err = -EOPNOTSUPP;
6983                 goto out;
6984         }
6985
6986         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
6987  out:
6988         wdev_unlock(wdev);
6989         return err;
6990 }
6991
6992 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6993                                              struct genl_info *info)
6994 {
6995         struct net_device *dev = info->user_ptr[1];
6996         struct wireless_dev *wdev = dev->ieee80211_ptr;
6997
6998         if (wdev->iftype != NL80211_IFTYPE_AP &&
6999             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7000                 return -EINVAL;
7001
7002         if (wdev->ap_unexpected_nlportid)
7003                 return -EBUSY;
7004
7005         wdev->ap_unexpected_nlportid = info->snd_portid;
7006         return 0;
7007 }
7008
7009 static int nl80211_probe_client(struct sk_buff *skb,
7010                                 struct genl_info *info)
7011 {
7012         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7013         struct net_device *dev = info->user_ptr[1];
7014         struct wireless_dev *wdev = dev->ieee80211_ptr;
7015         struct sk_buff *msg;
7016         void *hdr;
7017         const u8 *addr;
7018         u64 cookie;
7019         int err;
7020
7021         if (wdev->iftype != NL80211_IFTYPE_AP &&
7022             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7023                 return -EOPNOTSUPP;
7024
7025         if (!info->attrs[NL80211_ATTR_MAC])
7026                 return -EINVAL;
7027
7028         if (!rdev->ops->probe_client)
7029                 return -EOPNOTSUPP;
7030
7031         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7032         if (!msg)
7033                 return -ENOMEM;
7034
7035         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7036                              NL80211_CMD_PROBE_CLIENT);
7037
7038         if (IS_ERR(hdr)) {
7039                 err = PTR_ERR(hdr);
7040                 goto free_msg;
7041         }
7042
7043         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7044
7045         err = rdev_probe_client(rdev, dev, addr, &cookie);
7046         if (err)
7047                 goto free_msg;
7048
7049         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7050                 goto nla_put_failure;
7051
7052         genlmsg_end(msg, hdr);
7053
7054         return genlmsg_reply(msg, info);
7055
7056  nla_put_failure:
7057         err = -ENOBUFS;
7058  free_msg:
7059         nlmsg_free(msg);
7060         return err;
7061 }
7062
7063 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7064 {
7065         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7066         struct cfg80211_beacon_registration *reg, *nreg;
7067         int rv;
7068
7069         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7070                 return -EOPNOTSUPP;
7071
7072         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7073         if (!nreg)
7074                 return -ENOMEM;
7075
7076         /* First, check if already registered. */
7077         spin_lock_bh(&rdev->beacon_registrations_lock);
7078         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7079                 if (reg->nlportid == info->snd_portid) {
7080                         rv = -EALREADY;
7081                         goto out_err;
7082                 }
7083         }
7084         /* Add it to the list */
7085         nreg->nlportid = info->snd_portid;
7086         list_add(&nreg->list, &rdev->beacon_registrations);
7087
7088         spin_unlock_bh(&rdev->beacon_registrations_lock);
7089
7090         return 0;
7091 out_err:
7092         spin_unlock_bh(&rdev->beacon_registrations_lock);
7093         kfree(nreg);
7094         return rv;
7095 }
7096
7097 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7098 {
7099         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7100         struct wireless_dev *wdev = info->user_ptr[1];
7101         int err;
7102
7103         if (!rdev->ops->start_p2p_device)
7104                 return -EOPNOTSUPP;
7105
7106         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7107                 return -EOPNOTSUPP;
7108
7109         if (wdev->p2p_started)
7110                 return 0;
7111
7112         mutex_lock(&rdev->devlist_mtx);
7113         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7114         mutex_unlock(&rdev->devlist_mtx);
7115         if (err)
7116                 return err;
7117
7118         err = rdev_start_p2p_device(rdev, wdev);
7119         if (err)
7120                 return err;
7121
7122         wdev->p2p_started = true;
7123         mutex_lock(&rdev->devlist_mtx);
7124         rdev->opencount++;
7125         mutex_unlock(&rdev->devlist_mtx);
7126
7127         return 0;
7128 }
7129
7130 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7131 {
7132         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7133         struct wireless_dev *wdev = info->user_ptr[1];
7134
7135         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7136                 return -EOPNOTSUPP;
7137
7138         if (!rdev->ops->stop_p2p_device)
7139                 return -EOPNOTSUPP;
7140
7141         if (!wdev->p2p_started)
7142                 return 0;
7143
7144         rdev_stop_p2p_device(rdev, wdev);
7145         wdev->p2p_started = false;
7146
7147         mutex_lock(&rdev->devlist_mtx);
7148         rdev->opencount--;
7149         mutex_unlock(&rdev->devlist_mtx);
7150
7151         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7152                 rdev->scan_req->aborted = true;
7153                 ___cfg80211_scan_done(rdev, true);
7154         }
7155
7156         return 0;
7157 }
7158
7159 #define NL80211_FLAG_NEED_WIPHY         0x01
7160 #define NL80211_FLAG_NEED_NETDEV        0x02
7161 #define NL80211_FLAG_NEED_RTNL          0x04
7162 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7163 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7164                                          NL80211_FLAG_CHECK_NETDEV_UP)
7165 #define NL80211_FLAG_NEED_WDEV          0x10
7166 /* If a netdev is associated, it must be UP, P2P must be started */
7167 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7168                                          NL80211_FLAG_CHECK_NETDEV_UP)
7169
7170 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7171                             struct genl_info *info)
7172 {
7173         struct cfg80211_registered_device *rdev;
7174         struct wireless_dev *wdev;
7175         struct net_device *dev;
7176         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7177
7178         if (rtnl)
7179                 rtnl_lock();
7180
7181         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7182                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7183                 if (IS_ERR(rdev)) {
7184                         if (rtnl)
7185                                 rtnl_unlock();
7186                         return PTR_ERR(rdev);
7187                 }
7188                 info->user_ptr[0] = rdev;
7189         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7190                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7191                 mutex_lock(&cfg80211_mutex);
7192                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7193                                                   info->attrs);
7194                 if (IS_ERR(wdev)) {
7195                         mutex_unlock(&cfg80211_mutex);
7196                         if (rtnl)
7197                                 rtnl_unlock();
7198                         return PTR_ERR(wdev);
7199                 }
7200
7201                 dev = wdev->netdev;
7202                 rdev = wiphy_to_dev(wdev->wiphy);
7203
7204                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7205                         if (!dev) {
7206                                 mutex_unlock(&cfg80211_mutex);
7207                                 if (rtnl)
7208                                         rtnl_unlock();
7209                                 return -EINVAL;
7210                         }
7211
7212                         info->user_ptr[1] = dev;
7213                 } else {
7214                         info->user_ptr[1] = wdev;
7215                 }
7216
7217                 if (dev) {
7218                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7219                             !netif_running(dev)) {
7220                                 mutex_unlock(&cfg80211_mutex);
7221                                 if (rtnl)
7222                                         rtnl_unlock();
7223                                 return -ENETDOWN;
7224                         }
7225
7226                         dev_hold(dev);
7227                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7228                         if (!wdev->p2p_started) {
7229                                 mutex_unlock(&cfg80211_mutex);
7230                                 if (rtnl)
7231                                         rtnl_unlock();
7232                                 return -ENETDOWN;
7233                         }
7234                 }
7235
7236                 cfg80211_lock_rdev(rdev);
7237
7238                 mutex_unlock(&cfg80211_mutex);
7239
7240                 info->user_ptr[0] = rdev;
7241         }
7242
7243         return 0;
7244 }
7245
7246 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7247                               struct genl_info *info)
7248 {
7249         if (info->user_ptr[0])
7250                 cfg80211_unlock_rdev(info->user_ptr[0]);
7251         if (info->user_ptr[1]) {
7252                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7253                         struct wireless_dev *wdev = info->user_ptr[1];
7254
7255                         if (wdev->netdev)
7256                                 dev_put(wdev->netdev);
7257                 } else {
7258                         dev_put(info->user_ptr[1]);
7259                 }
7260         }
7261         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7262                 rtnl_unlock();
7263 }
7264
7265 static struct genl_ops nl80211_ops[] = {
7266         {
7267                 .cmd = NL80211_CMD_GET_WIPHY,
7268                 .doit = nl80211_get_wiphy,
7269                 .dumpit = nl80211_dump_wiphy,
7270                 .policy = nl80211_policy,
7271                 /* can be retrieved by unprivileged users */
7272                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7273         },
7274         {
7275                 .cmd = NL80211_CMD_SET_WIPHY,
7276                 .doit = nl80211_set_wiphy,
7277                 .policy = nl80211_policy,
7278                 .flags = GENL_ADMIN_PERM,
7279                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7280         },
7281         {
7282                 .cmd = NL80211_CMD_GET_INTERFACE,
7283                 .doit = nl80211_get_interface,
7284                 .dumpit = nl80211_dump_interface,
7285                 .policy = nl80211_policy,
7286                 /* can be retrieved by unprivileged users */
7287                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7288         },
7289         {
7290                 .cmd = NL80211_CMD_SET_INTERFACE,
7291                 .doit = nl80211_set_interface,
7292                 .policy = nl80211_policy,
7293                 .flags = GENL_ADMIN_PERM,
7294                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7295                                   NL80211_FLAG_NEED_RTNL,
7296         },
7297         {
7298                 .cmd = NL80211_CMD_NEW_INTERFACE,
7299                 .doit = nl80211_new_interface,
7300                 .policy = nl80211_policy,
7301                 .flags = GENL_ADMIN_PERM,
7302                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7303                                   NL80211_FLAG_NEED_RTNL,
7304         },
7305         {
7306                 .cmd = NL80211_CMD_DEL_INTERFACE,
7307                 .doit = nl80211_del_interface,
7308                 .policy = nl80211_policy,
7309                 .flags = GENL_ADMIN_PERM,
7310                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7311                                   NL80211_FLAG_NEED_RTNL,
7312         },
7313         {
7314                 .cmd = NL80211_CMD_GET_KEY,
7315                 .doit = nl80211_get_key,
7316                 .policy = nl80211_policy,
7317                 .flags = GENL_ADMIN_PERM,
7318                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7319                                   NL80211_FLAG_NEED_RTNL,
7320         },
7321         {
7322                 .cmd = NL80211_CMD_SET_KEY,
7323                 .doit = nl80211_set_key,
7324                 .policy = nl80211_policy,
7325                 .flags = GENL_ADMIN_PERM,
7326                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7327                                   NL80211_FLAG_NEED_RTNL,
7328         },
7329         {
7330                 .cmd = NL80211_CMD_NEW_KEY,
7331                 .doit = nl80211_new_key,
7332                 .policy = nl80211_policy,
7333                 .flags = GENL_ADMIN_PERM,
7334                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7335                                   NL80211_FLAG_NEED_RTNL,
7336         },
7337         {
7338                 .cmd = NL80211_CMD_DEL_KEY,
7339                 .doit = nl80211_del_key,
7340                 .policy = nl80211_policy,
7341                 .flags = GENL_ADMIN_PERM,
7342                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7343                                   NL80211_FLAG_NEED_RTNL,
7344         },
7345         {
7346                 .cmd = NL80211_CMD_SET_BEACON,
7347                 .policy = nl80211_policy,
7348                 .flags = GENL_ADMIN_PERM,
7349                 .doit = nl80211_set_beacon,
7350                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7351                                   NL80211_FLAG_NEED_RTNL,
7352         },
7353         {
7354                 .cmd = NL80211_CMD_START_AP,
7355                 .policy = nl80211_policy,
7356                 .flags = GENL_ADMIN_PERM,
7357                 .doit = nl80211_start_ap,
7358                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7359                                   NL80211_FLAG_NEED_RTNL,
7360         },
7361         {
7362                 .cmd = NL80211_CMD_STOP_AP,
7363                 .policy = nl80211_policy,
7364                 .flags = GENL_ADMIN_PERM,
7365                 .doit = nl80211_stop_ap,
7366                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7367                                   NL80211_FLAG_NEED_RTNL,
7368         },
7369         {
7370                 .cmd = NL80211_CMD_GET_STATION,
7371                 .doit = nl80211_get_station,
7372                 .dumpit = nl80211_dump_station,
7373                 .policy = nl80211_policy,
7374                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7375                                   NL80211_FLAG_NEED_RTNL,
7376         },
7377         {
7378                 .cmd = NL80211_CMD_SET_STATION,
7379                 .doit = nl80211_set_station,
7380                 .policy = nl80211_policy,
7381                 .flags = GENL_ADMIN_PERM,
7382                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7383                                   NL80211_FLAG_NEED_RTNL,
7384         },
7385         {
7386                 .cmd = NL80211_CMD_NEW_STATION,
7387                 .doit = nl80211_new_station,
7388                 .policy = nl80211_policy,
7389                 .flags = GENL_ADMIN_PERM,
7390                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7391                                   NL80211_FLAG_NEED_RTNL,
7392         },
7393         {
7394                 .cmd = NL80211_CMD_DEL_STATION,
7395                 .doit = nl80211_del_station,
7396                 .policy = nl80211_policy,
7397                 .flags = GENL_ADMIN_PERM,
7398                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7399                                   NL80211_FLAG_NEED_RTNL,
7400         },
7401         {
7402                 .cmd = NL80211_CMD_GET_MPATH,
7403                 .doit = nl80211_get_mpath,
7404                 .dumpit = nl80211_dump_mpath,
7405                 .policy = nl80211_policy,
7406                 .flags = GENL_ADMIN_PERM,
7407                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7408                                   NL80211_FLAG_NEED_RTNL,
7409         },
7410         {
7411                 .cmd = NL80211_CMD_SET_MPATH,
7412                 .doit = nl80211_set_mpath,
7413                 .policy = nl80211_policy,
7414                 .flags = GENL_ADMIN_PERM,
7415                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7416                                   NL80211_FLAG_NEED_RTNL,
7417         },
7418         {
7419                 .cmd = NL80211_CMD_NEW_MPATH,
7420                 .doit = nl80211_new_mpath,
7421                 .policy = nl80211_policy,
7422                 .flags = GENL_ADMIN_PERM,
7423                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7424                                   NL80211_FLAG_NEED_RTNL,
7425         },
7426         {
7427                 .cmd = NL80211_CMD_DEL_MPATH,
7428                 .doit = nl80211_del_mpath,
7429                 .policy = nl80211_policy,
7430                 .flags = GENL_ADMIN_PERM,
7431                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7432                                   NL80211_FLAG_NEED_RTNL,
7433         },
7434         {
7435                 .cmd = NL80211_CMD_SET_BSS,
7436                 .doit = nl80211_set_bss,
7437                 .policy = nl80211_policy,
7438                 .flags = GENL_ADMIN_PERM,
7439                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7440                                   NL80211_FLAG_NEED_RTNL,
7441         },
7442         {
7443                 .cmd = NL80211_CMD_GET_REG,
7444                 .doit = nl80211_get_reg,
7445                 .policy = nl80211_policy,
7446                 /* can be retrieved by unprivileged users */
7447         },
7448         {
7449                 .cmd = NL80211_CMD_SET_REG,
7450                 .doit = nl80211_set_reg,
7451                 .policy = nl80211_policy,
7452                 .flags = GENL_ADMIN_PERM,
7453         },
7454         {
7455                 .cmd = NL80211_CMD_REQ_SET_REG,
7456                 .doit = nl80211_req_set_reg,
7457                 .policy = nl80211_policy,
7458                 .flags = GENL_ADMIN_PERM,
7459         },
7460         {
7461                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7462                 .doit = nl80211_get_mesh_config,
7463                 .policy = nl80211_policy,
7464                 /* can be retrieved by unprivileged users */
7465                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7466                                   NL80211_FLAG_NEED_RTNL,
7467         },
7468         {
7469                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7470                 .doit = nl80211_update_mesh_config,
7471                 .policy = nl80211_policy,
7472                 .flags = GENL_ADMIN_PERM,
7473                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7474                                   NL80211_FLAG_NEED_RTNL,
7475         },
7476         {
7477                 .cmd = NL80211_CMD_TRIGGER_SCAN,
7478                 .doit = nl80211_trigger_scan,
7479                 .policy = nl80211_policy,
7480                 .flags = GENL_ADMIN_PERM,
7481                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7482                                   NL80211_FLAG_NEED_RTNL,
7483         },
7484         {
7485                 .cmd = NL80211_CMD_GET_SCAN,
7486                 .policy = nl80211_policy,
7487                 .dumpit = nl80211_dump_scan,
7488         },
7489         {
7490                 .cmd = NL80211_CMD_START_SCHED_SCAN,
7491                 .doit = nl80211_start_sched_scan,
7492                 .policy = nl80211_policy,
7493                 .flags = GENL_ADMIN_PERM,
7494                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7495                                   NL80211_FLAG_NEED_RTNL,
7496         },
7497         {
7498                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7499                 .doit = nl80211_stop_sched_scan,
7500                 .policy = nl80211_policy,
7501                 .flags = GENL_ADMIN_PERM,
7502                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7503                                   NL80211_FLAG_NEED_RTNL,
7504         },
7505         {
7506                 .cmd = NL80211_CMD_AUTHENTICATE,
7507                 .doit = nl80211_authenticate,
7508                 .policy = nl80211_policy,
7509                 .flags = GENL_ADMIN_PERM,
7510                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7511                                   NL80211_FLAG_NEED_RTNL,
7512         },
7513         {
7514                 .cmd = NL80211_CMD_ASSOCIATE,
7515                 .doit = nl80211_associate,
7516                 .policy = nl80211_policy,
7517                 .flags = GENL_ADMIN_PERM,
7518                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7519                                   NL80211_FLAG_NEED_RTNL,
7520         },
7521         {
7522                 .cmd = NL80211_CMD_DEAUTHENTICATE,
7523                 .doit = nl80211_deauthenticate,
7524                 .policy = nl80211_policy,
7525                 .flags = GENL_ADMIN_PERM,
7526                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7527                                   NL80211_FLAG_NEED_RTNL,
7528         },
7529         {
7530                 .cmd = NL80211_CMD_DISASSOCIATE,
7531                 .doit = nl80211_disassociate,
7532                 .policy = nl80211_policy,
7533                 .flags = GENL_ADMIN_PERM,
7534                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7535                                   NL80211_FLAG_NEED_RTNL,
7536         },
7537         {
7538                 .cmd = NL80211_CMD_JOIN_IBSS,
7539                 .doit = nl80211_join_ibss,
7540                 .policy = nl80211_policy,
7541                 .flags = GENL_ADMIN_PERM,
7542                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7543                                   NL80211_FLAG_NEED_RTNL,
7544         },
7545         {
7546                 .cmd = NL80211_CMD_LEAVE_IBSS,
7547                 .doit = nl80211_leave_ibss,
7548                 .policy = nl80211_policy,
7549                 .flags = GENL_ADMIN_PERM,
7550                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7551                                   NL80211_FLAG_NEED_RTNL,
7552         },
7553 #ifdef CONFIG_NL80211_TESTMODE
7554         {
7555                 .cmd = NL80211_CMD_TESTMODE,
7556                 .doit = nl80211_testmode_do,
7557                 .dumpit = nl80211_testmode_dump,
7558                 .policy = nl80211_policy,
7559                 .flags = GENL_ADMIN_PERM,
7560                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7561                                   NL80211_FLAG_NEED_RTNL,
7562         },
7563 #endif
7564         {
7565                 .cmd = NL80211_CMD_CONNECT,
7566                 .doit = nl80211_connect,
7567                 .policy = nl80211_policy,
7568                 .flags = GENL_ADMIN_PERM,
7569                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7570                                   NL80211_FLAG_NEED_RTNL,
7571         },
7572         {
7573                 .cmd = NL80211_CMD_DISCONNECT,
7574                 .doit = nl80211_disconnect,
7575                 .policy = nl80211_policy,
7576                 .flags = GENL_ADMIN_PERM,
7577                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7578                                   NL80211_FLAG_NEED_RTNL,
7579         },
7580         {
7581                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7582                 .doit = nl80211_wiphy_netns,
7583                 .policy = nl80211_policy,
7584                 .flags = GENL_ADMIN_PERM,
7585                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7586                                   NL80211_FLAG_NEED_RTNL,
7587         },
7588         {
7589                 .cmd = NL80211_CMD_GET_SURVEY,
7590                 .policy = nl80211_policy,
7591                 .dumpit = nl80211_dump_survey,
7592         },
7593         {
7594                 .cmd = NL80211_CMD_SET_PMKSA,
7595                 .doit = nl80211_setdel_pmksa,
7596                 .policy = nl80211_policy,
7597                 .flags = GENL_ADMIN_PERM,
7598                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7599                                   NL80211_FLAG_NEED_RTNL,
7600         },
7601         {
7602                 .cmd = NL80211_CMD_DEL_PMKSA,
7603                 .doit = nl80211_setdel_pmksa,
7604                 .policy = nl80211_policy,
7605                 .flags = GENL_ADMIN_PERM,
7606                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7607                                   NL80211_FLAG_NEED_RTNL,
7608         },
7609         {
7610                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7611                 .doit = nl80211_flush_pmksa,
7612                 .policy = nl80211_policy,
7613                 .flags = GENL_ADMIN_PERM,
7614                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7615                                   NL80211_FLAG_NEED_RTNL,
7616         },
7617         {
7618                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7619                 .doit = nl80211_remain_on_channel,
7620                 .policy = nl80211_policy,
7621                 .flags = GENL_ADMIN_PERM,
7622                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7623                                   NL80211_FLAG_NEED_RTNL,
7624         },
7625         {
7626                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7627                 .doit = nl80211_cancel_remain_on_channel,
7628                 .policy = nl80211_policy,
7629                 .flags = GENL_ADMIN_PERM,
7630                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7631                                   NL80211_FLAG_NEED_RTNL,
7632         },
7633         {
7634                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7635                 .doit = nl80211_set_tx_bitrate_mask,
7636                 .policy = nl80211_policy,
7637                 .flags = GENL_ADMIN_PERM,
7638                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7639                                   NL80211_FLAG_NEED_RTNL,
7640         },
7641         {
7642                 .cmd = NL80211_CMD_REGISTER_FRAME,
7643                 .doit = nl80211_register_mgmt,
7644                 .policy = nl80211_policy,
7645                 .flags = GENL_ADMIN_PERM,
7646                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7647                                   NL80211_FLAG_NEED_RTNL,
7648         },
7649         {
7650                 .cmd = NL80211_CMD_FRAME,
7651                 .doit = nl80211_tx_mgmt,
7652                 .policy = nl80211_policy,
7653                 .flags = GENL_ADMIN_PERM,
7654                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7655                                   NL80211_FLAG_NEED_RTNL,
7656         },
7657         {
7658                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7659                 .doit = nl80211_tx_mgmt_cancel_wait,
7660                 .policy = nl80211_policy,
7661                 .flags = GENL_ADMIN_PERM,
7662                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7663                                   NL80211_FLAG_NEED_RTNL,
7664         },
7665         {
7666                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7667                 .doit = nl80211_set_power_save,
7668                 .policy = nl80211_policy,
7669                 .flags = GENL_ADMIN_PERM,
7670                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7671                                   NL80211_FLAG_NEED_RTNL,
7672         },
7673         {
7674                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7675                 .doit = nl80211_get_power_save,
7676                 .policy = nl80211_policy,
7677                 /* can be retrieved by unprivileged users */
7678                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7679                                   NL80211_FLAG_NEED_RTNL,
7680         },
7681         {
7682                 .cmd = NL80211_CMD_SET_CQM,
7683                 .doit = nl80211_set_cqm,
7684                 .policy = nl80211_policy,
7685                 .flags = GENL_ADMIN_PERM,
7686                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7687                                   NL80211_FLAG_NEED_RTNL,
7688         },
7689         {
7690                 .cmd = NL80211_CMD_SET_CHANNEL,
7691                 .doit = nl80211_set_channel,
7692                 .policy = nl80211_policy,
7693                 .flags = GENL_ADMIN_PERM,
7694                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7695                                   NL80211_FLAG_NEED_RTNL,
7696         },
7697         {
7698                 .cmd = NL80211_CMD_SET_WDS_PEER,
7699                 .doit = nl80211_set_wds_peer,
7700                 .policy = nl80211_policy,
7701                 .flags = GENL_ADMIN_PERM,
7702                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7703                                   NL80211_FLAG_NEED_RTNL,
7704         },
7705         {
7706                 .cmd = NL80211_CMD_JOIN_MESH,
7707                 .doit = nl80211_join_mesh,
7708                 .policy = nl80211_policy,
7709                 .flags = GENL_ADMIN_PERM,
7710                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7711                                   NL80211_FLAG_NEED_RTNL,
7712         },
7713         {
7714                 .cmd = NL80211_CMD_LEAVE_MESH,
7715                 .doit = nl80211_leave_mesh,
7716                 .policy = nl80211_policy,
7717                 .flags = GENL_ADMIN_PERM,
7718                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7719                                   NL80211_FLAG_NEED_RTNL,
7720         },
7721 #ifdef CONFIG_PM
7722         {
7723                 .cmd = NL80211_CMD_GET_WOWLAN,
7724                 .doit = nl80211_get_wowlan,
7725                 .policy = nl80211_policy,
7726                 /* can be retrieved by unprivileged users */
7727                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7728                                   NL80211_FLAG_NEED_RTNL,
7729         },
7730         {
7731                 .cmd = NL80211_CMD_SET_WOWLAN,
7732                 .doit = nl80211_set_wowlan,
7733                 .policy = nl80211_policy,
7734                 .flags = GENL_ADMIN_PERM,
7735                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7736                                   NL80211_FLAG_NEED_RTNL,
7737         },
7738 #endif
7739         {
7740                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7741                 .doit = nl80211_set_rekey_data,
7742                 .policy = nl80211_policy,
7743                 .flags = GENL_ADMIN_PERM,
7744                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7745                                   NL80211_FLAG_NEED_RTNL,
7746         },
7747         {
7748                 .cmd = NL80211_CMD_TDLS_MGMT,
7749                 .doit = nl80211_tdls_mgmt,
7750                 .policy = nl80211_policy,
7751                 .flags = GENL_ADMIN_PERM,
7752                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7753                                   NL80211_FLAG_NEED_RTNL,
7754         },
7755         {
7756                 .cmd = NL80211_CMD_TDLS_OPER,
7757                 .doit = nl80211_tdls_oper,
7758                 .policy = nl80211_policy,
7759                 .flags = GENL_ADMIN_PERM,
7760                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7761                                   NL80211_FLAG_NEED_RTNL,
7762         },
7763         {
7764                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7765                 .doit = nl80211_register_unexpected_frame,
7766                 .policy = nl80211_policy,
7767                 .flags = GENL_ADMIN_PERM,
7768                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7769                                   NL80211_FLAG_NEED_RTNL,
7770         },
7771         {
7772                 .cmd = NL80211_CMD_PROBE_CLIENT,
7773                 .doit = nl80211_probe_client,
7774                 .policy = nl80211_policy,
7775                 .flags = GENL_ADMIN_PERM,
7776                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7777                                   NL80211_FLAG_NEED_RTNL,
7778         },
7779         {
7780                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7781                 .doit = nl80211_register_beacons,
7782                 .policy = nl80211_policy,
7783                 .flags = GENL_ADMIN_PERM,
7784                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7785                                   NL80211_FLAG_NEED_RTNL,
7786         },
7787         {
7788                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7789                 .doit = nl80211_set_noack_map,
7790                 .policy = nl80211_policy,
7791                 .flags = GENL_ADMIN_PERM,
7792                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7793                                   NL80211_FLAG_NEED_RTNL,
7794         },
7795         {
7796                 .cmd = NL80211_CMD_START_P2P_DEVICE,
7797                 .doit = nl80211_start_p2p_device,
7798                 .policy = nl80211_policy,
7799                 .flags = GENL_ADMIN_PERM,
7800                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7801                                   NL80211_FLAG_NEED_RTNL,
7802         },
7803         {
7804                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
7805                 .doit = nl80211_stop_p2p_device,
7806                 .policy = nl80211_policy,
7807                 .flags = GENL_ADMIN_PERM,
7808                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7809                                   NL80211_FLAG_NEED_RTNL,
7810         },
7811         {
7812                 .cmd = NL80211_CMD_SET_MCAST_RATE,
7813                 .doit = nl80211_set_mcast_rate,
7814                 .policy = nl80211_policy,
7815                 .flags = GENL_ADMIN_PERM,
7816                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7817                                   NL80211_FLAG_NEED_RTNL,
7818         },
7819 };
7820
7821 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7822         .name = "mlme",
7823 };
7824
7825 /* multicast groups */
7826 static struct genl_multicast_group nl80211_config_mcgrp = {
7827         .name = "config",
7828 };
7829 static struct genl_multicast_group nl80211_scan_mcgrp = {
7830         .name = "scan",
7831 };
7832 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7833         .name = "regulatory",
7834 };
7835
7836 /* notification functions */
7837
7838 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7839 {
7840         struct sk_buff *msg;
7841
7842         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7843         if (!msg)
7844                 return;
7845
7846         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7847                 nlmsg_free(msg);
7848                 return;
7849         }
7850
7851         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7852                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7853 }
7854
7855 static int nl80211_add_scan_req(struct sk_buff *msg,
7856                                 struct cfg80211_registered_device *rdev)
7857 {
7858         struct cfg80211_scan_request *req = rdev->scan_req;
7859         struct nlattr *nest;
7860         int i;
7861
7862         ASSERT_RDEV_LOCK(rdev);
7863
7864         if (WARN_ON(!req))
7865                 return 0;
7866
7867         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7868         if (!nest)
7869                 goto nla_put_failure;
7870         for (i = 0; i < req->n_ssids; i++) {
7871                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7872                         goto nla_put_failure;
7873         }
7874         nla_nest_end(msg, nest);
7875
7876         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7877         if (!nest)
7878                 goto nla_put_failure;
7879         for (i = 0; i < req->n_channels; i++) {
7880                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7881                         goto nla_put_failure;
7882         }
7883         nla_nest_end(msg, nest);
7884
7885         if (req->ie &&
7886             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7887                 goto nla_put_failure;
7888
7889         if (req->flags)
7890                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
7891
7892         return 0;
7893  nla_put_failure:
7894         return -ENOBUFS;
7895 }
7896
7897 static int nl80211_send_scan_msg(struct sk_buff *msg,
7898                                  struct cfg80211_registered_device *rdev,
7899                                  struct wireless_dev *wdev,
7900                                  u32 portid, u32 seq, int flags,
7901                                  u32 cmd)
7902 {
7903         void *hdr;
7904
7905         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7906         if (!hdr)
7907                 return -1;
7908
7909         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7910             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
7911                                          wdev->netdev->ifindex)) ||
7912             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
7913                 goto nla_put_failure;
7914
7915         /* ignore errors and send incomplete event anyway */
7916         nl80211_add_scan_req(msg, rdev);
7917
7918         return genlmsg_end(msg, hdr);
7919
7920  nla_put_failure:
7921         genlmsg_cancel(msg, hdr);
7922         return -EMSGSIZE;
7923 }
7924
7925 static int
7926 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7927                             struct cfg80211_registered_device *rdev,
7928                             struct net_device *netdev,
7929                             u32 portid, u32 seq, int flags, u32 cmd)
7930 {
7931         void *hdr;
7932
7933         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7934         if (!hdr)
7935                 return -1;
7936
7937         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7938             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7939                 goto nla_put_failure;
7940
7941         return genlmsg_end(msg, hdr);
7942
7943  nla_put_failure:
7944         genlmsg_cancel(msg, hdr);
7945         return -EMSGSIZE;
7946 }
7947
7948 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7949                              struct wireless_dev *wdev)
7950 {
7951         struct sk_buff *msg;
7952
7953         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7954         if (!msg)
7955                 return;
7956
7957         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7958                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7959                 nlmsg_free(msg);
7960                 return;
7961         }
7962
7963         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7964                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7965 }
7966
7967 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7968                             struct wireless_dev *wdev)
7969 {
7970         struct sk_buff *msg;
7971
7972         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7973         if (!msg)
7974                 return;
7975
7976         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7977                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7978                 nlmsg_free(msg);
7979                 return;
7980         }
7981
7982         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7983                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7984 }
7985
7986 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7987                                struct wireless_dev *wdev)
7988 {
7989         struct sk_buff *msg;
7990
7991         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7992         if (!msg)
7993                 return;
7994
7995         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7996                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7997                 nlmsg_free(msg);
7998                 return;
7999         }
8000
8001         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8002                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8003 }
8004
8005 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
8006                                      struct net_device *netdev)
8007 {
8008         struct sk_buff *msg;
8009
8010         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8011         if (!msg)
8012                 return;
8013
8014         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
8015                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
8016                 nlmsg_free(msg);
8017                 return;
8018         }
8019
8020         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8021                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8022 }
8023
8024 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
8025                              struct net_device *netdev, u32 cmd)
8026 {
8027         struct sk_buff *msg;
8028
8029         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8030         if (!msg)
8031                 return;
8032
8033         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
8034                 nlmsg_free(msg);
8035                 return;
8036         }
8037
8038         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8039                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8040 }
8041
8042 /*
8043  * This can happen on global regulatory changes or device specific settings
8044  * based on custom world regulatory domains.
8045  */
8046 void nl80211_send_reg_change_event(struct regulatory_request *request)
8047 {
8048         struct sk_buff *msg;
8049         void *hdr;
8050
8051         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8052         if (!msg)
8053                 return;
8054
8055         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8056         if (!hdr) {
8057                 nlmsg_free(msg);
8058                 return;
8059         }
8060
8061         /* Userspace can always count this one always being set */
8062         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8063                 goto nla_put_failure;
8064
8065         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8066                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8067                                NL80211_REGDOM_TYPE_WORLD))
8068                         goto nla_put_failure;
8069         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8070                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8071                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8072                         goto nla_put_failure;
8073         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8074                    request->intersect) {
8075                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8076                                NL80211_REGDOM_TYPE_INTERSECTION))
8077                         goto nla_put_failure;
8078         } else {
8079                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8080                                NL80211_REGDOM_TYPE_COUNTRY) ||
8081                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8082                                    request->alpha2))
8083                         goto nla_put_failure;
8084         }
8085
8086         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
8087             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8088                 goto nla_put_failure;
8089
8090         genlmsg_end(msg, hdr);
8091
8092         rcu_read_lock();
8093         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8094                                 GFP_ATOMIC);
8095         rcu_read_unlock();
8096
8097         return;
8098
8099 nla_put_failure:
8100         genlmsg_cancel(msg, hdr);
8101         nlmsg_free(msg);
8102 }
8103
8104 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8105                                     struct net_device *netdev,
8106                                     const u8 *buf, size_t len,
8107                                     enum nl80211_commands cmd, gfp_t gfp)
8108 {
8109         struct sk_buff *msg;
8110         void *hdr;
8111
8112         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8113         if (!msg)
8114                 return;
8115
8116         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8117         if (!hdr) {
8118                 nlmsg_free(msg);
8119                 return;
8120         }
8121
8122         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8123             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8124             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8125                 goto nla_put_failure;
8126
8127         genlmsg_end(msg, hdr);
8128
8129         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8130                                 nl80211_mlme_mcgrp.id, gfp);
8131         return;
8132
8133  nla_put_failure:
8134         genlmsg_cancel(msg, hdr);
8135         nlmsg_free(msg);
8136 }
8137
8138 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8139                           struct net_device *netdev, const u8 *buf,
8140                           size_t len, gfp_t gfp)
8141 {
8142         nl80211_send_mlme_event(rdev, netdev, buf, len,
8143                                 NL80211_CMD_AUTHENTICATE, gfp);
8144 }
8145
8146 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8147                            struct net_device *netdev, const u8 *buf,
8148                            size_t len, gfp_t gfp)
8149 {
8150         nl80211_send_mlme_event(rdev, netdev, buf, len,
8151                                 NL80211_CMD_ASSOCIATE, gfp);
8152 }
8153
8154 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8155                          struct net_device *netdev, const u8 *buf,
8156                          size_t len, gfp_t gfp)
8157 {
8158         nl80211_send_mlme_event(rdev, netdev, buf, len,
8159                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8160 }
8161
8162 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8163                            struct net_device *netdev, const u8 *buf,
8164                            size_t len, gfp_t gfp)
8165 {
8166         nl80211_send_mlme_event(rdev, netdev, buf, len,
8167                                 NL80211_CMD_DISASSOCIATE, gfp);
8168 }
8169
8170 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8171                                 struct net_device *netdev, const u8 *buf,
8172                                 size_t len, gfp_t gfp)
8173 {
8174         nl80211_send_mlme_event(rdev, netdev, buf, len,
8175                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8176 }
8177
8178 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8179                                   struct net_device *netdev, const u8 *buf,
8180                                   size_t len, gfp_t gfp)
8181 {
8182         nl80211_send_mlme_event(rdev, netdev, buf, len,
8183                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8184 }
8185
8186 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8187                                       struct net_device *netdev, int cmd,
8188                                       const u8 *addr, gfp_t gfp)
8189 {
8190         struct sk_buff *msg;
8191         void *hdr;
8192
8193         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8194         if (!msg)
8195                 return;
8196
8197         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8198         if (!hdr) {
8199                 nlmsg_free(msg);
8200                 return;
8201         }
8202
8203         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8204             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8205             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8206             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8207                 goto nla_put_failure;
8208
8209         genlmsg_end(msg, hdr);
8210
8211         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8212                                 nl80211_mlme_mcgrp.id, gfp);
8213         return;
8214
8215  nla_put_failure:
8216         genlmsg_cancel(msg, hdr);
8217         nlmsg_free(msg);
8218 }
8219
8220 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8221                                struct net_device *netdev, const u8 *addr,
8222                                gfp_t gfp)
8223 {
8224         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8225                                   addr, gfp);
8226 }
8227
8228 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8229                                 struct net_device *netdev, const u8 *addr,
8230                                 gfp_t gfp)
8231 {
8232         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8233                                   addr, gfp);
8234 }
8235
8236 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8237                                  struct net_device *netdev, const u8 *bssid,
8238                                  const u8 *req_ie, size_t req_ie_len,
8239                                  const u8 *resp_ie, size_t resp_ie_len,
8240                                  u16 status, gfp_t gfp)
8241 {
8242         struct sk_buff *msg;
8243         void *hdr;
8244
8245         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8246         if (!msg)
8247                 return;
8248
8249         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8250         if (!hdr) {
8251                 nlmsg_free(msg);
8252                 return;
8253         }
8254
8255         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8256             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8257             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8258             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8259             (req_ie &&
8260              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8261             (resp_ie &&
8262              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8263                 goto nla_put_failure;
8264
8265         genlmsg_end(msg, hdr);
8266
8267         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8268                                 nl80211_mlme_mcgrp.id, gfp);
8269         return;
8270
8271  nla_put_failure:
8272         genlmsg_cancel(msg, hdr);
8273         nlmsg_free(msg);
8274
8275 }
8276
8277 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8278                          struct net_device *netdev, const u8 *bssid,
8279                          const u8 *req_ie, size_t req_ie_len,
8280                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8281 {
8282         struct sk_buff *msg;
8283         void *hdr;
8284
8285         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8286         if (!msg)
8287                 return;
8288
8289         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8290         if (!hdr) {
8291                 nlmsg_free(msg);
8292                 return;
8293         }
8294
8295         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8296             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8297             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8298             (req_ie &&
8299              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8300             (resp_ie &&
8301              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8302                 goto nla_put_failure;
8303
8304         genlmsg_end(msg, hdr);
8305
8306         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8307                                 nl80211_mlme_mcgrp.id, gfp);
8308         return;
8309
8310  nla_put_failure:
8311         genlmsg_cancel(msg, hdr);
8312         nlmsg_free(msg);
8313
8314 }
8315
8316 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8317                                struct net_device *netdev, u16 reason,
8318                                const u8 *ie, size_t ie_len, bool from_ap)
8319 {
8320         struct sk_buff *msg;
8321         void *hdr;
8322
8323         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8324         if (!msg)
8325                 return;
8326
8327         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8328         if (!hdr) {
8329                 nlmsg_free(msg);
8330                 return;
8331         }
8332
8333         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8334             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8335             (from_ap && reason &&
8336              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8337             (from_ap &&
8338              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8339             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8340                 goto nla_put_failure;
8341
8342         genlmsg_end(msg, hdr);
8343
8344         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8345                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8346         return;
8347
8348  nla_put_failure:
8349         genlmsg_cancel(msg, hdr);
8350         nlmsg_free(msg);
8351
8352 }
8353
8354 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8355                              struct net_device *netdev, const u8 *bssid,
8356                              gfp_t gfp)
8357 {
8358         struct sk_buff *msg;
8359         void *hdr;
8360
8361         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8362         if (!msg)
8363                 return;
8364
8365         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8366         if (!hdr) {
8367                 nlmsg_free(msg);
8368                 return;
8369         }
8370
8371         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8372             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8373             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8374                 goto nla_put_failure;
8375
8376         genlmsg_end(msg, hdr);
8377
8378         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8379                                 nl80211_mlme_mcgrp.id, gfp);
8380         return;
8381
8382  nla_put_failure:
8383         genlmsg_cancel(msg, hdr);
8384         nlmsg_free(msg);
8385 }
8386
8387 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
8388                 struct net_device *netdev,
8389                 const u8 *macaddr, const u8* ie, u8 ie_len,
8390                 gfp_t gfp)
8391 {
8392         struct sk_buff *msg;
8393         void *hdr;
8394
8395         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8396         if (!msg)
8397                 return;
8398
8399         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
8400         if (!hdr) {
8401                 nlmsg_free(msg);
8402                 return;
8403         }
8404
8405         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8406             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8407             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
8408             (ie_len && ie &&
8409              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
8410                 goto nla_put_failure;
8411
8412         genlmsg_end(msg, hdr);
8413
8414         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8415                                 nl80211_mlme_mcgrp.id, gfp);
8416         return;
8417
8418  nla_put_failure:
8419         genlmsg_cancel(msg, hdr);
8420         nlmsg_free(msg);
8421 }
8422
8423 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
8424                                  struct net_device *netdev, const u8 *addr,
8425                                  enum nl80211_key_type key_type, int key_id,
8426                                  const u8 *tsc, gfp_t gfp)
8427 {
8428         struct sk_buff *msg;
8429         void *hdr;
8430
8431         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8432         if (!msg)
8433                 return;
8434
8435         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
8436         if (!hdr) {
8437                 nlmsg_free(msg);
8438                 return;
8439         }
8440
8441         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8442             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8443             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
8444             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
8445             (key_id != -1 &&
8446              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
8447             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
8448                 goto nla_put_failure;
8449
8450         genlmsg_end(msg, hdr);
8451
8452         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8453                                 nl80211_mlme_mcgrp.id, gfp);
8454         return;
8455
8456  nla_put_failure:
8457         genlmsg_cancel(msg, hdr);
8458         nlmsg_free(msg);
8459 }
8460
8461 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8462                                     struct ieee80211_channel *channel_before,
8463                                     struct ieee80211_channel *channel_after)
8464 {
8465         struct sk_buff *msg;
8466         void *hdr;
8467         struct nlattr *nl_freq;
8468
8469         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8470         if (!msg)
8471                 return;
8472
8473         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8474         if (!hdr) {
8475                 nlmsg_free(msg);
8476                 return;
8477         }
8478
8479         /*
8480          * Since we are applying the beacon hint to a wiphy we know its
8481          * wiphy_idx is valid
8482          */
8483         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8484                 goto nla_put_failure;
8485
8486         /* Before */
8487         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8488         if (!nl_freq)
8489                 goto nla_put_failure;
8490         if (nl80211_msg_put_channel(msg, channel_before))
8491                 goto nla_put_failure;
8492         nla_nest_end(msg, nl_freq);
8493
8494         /* After */
8495         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8496         if (!nl_freq)
8497                 goto nla_put_failure;
8498         if (nl80211_msg_put_channel(msg, channel_after))
8499                 goto nla_put_failure;
8500         nla_nest_end(msg, nl_freq);
8501
8502         genlmsg_end(msg, hdr);
8503
8504         rcu_read_lock();
8505         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8506                                 GFP_ATOMIC);
8507         rcu_read_unlock();
8508
8509         return;
8510
8511 nla_put_failure:
8512         genlmsg_cancel(msg, hdr);
8513         nlmsg_free(msg);
8514 }
8515
8516 static void nl80211_send_remain_on_chan_event(
8517         int cmd, struct cfg80211_registered_device *rdev,
8518         struct wireless_dev *wdev, u64 cookie,
8519         struct ieee80211_channel *chan,
8520         unsigned int duration, gfp_t gfp)
8521 {
8522         struct sk_buff *msg;
8523         void *hdr;
8524
8525         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8526         if (!msg)
8527                 return;
8528
8529         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8530         if (!hdr) {
8531                 nlmsg_free(msg);
8532                 return;
8533         }
8534
8535         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8536             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8537                                          wdev->netdev->ifindex)) ||
8538             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8539             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8540             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
8541                         NL80211_CHAN_NO_HT) ||
8542             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8543                 goto nla_put_failure;
8544
8545         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8546             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8547                 goto nla_put_failure;
8548
8549         genlmsg_end(msg, hdr);
8550
8551         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8552                                 nl80211_mlme_mcgrp.id, gfp);
8553         return;
8554
8555  nla_put_failure:
8556         genlmsg_cancel(msg, hdr);
8557         nlmsg_free(msg);
8558 }
8559
8560 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8561                                     struct wireless_dev *wdev, u64 cookie,
8562                                     struct ieee80211_channel *chan,
8563                                     unsigned int duration, gfp_t gfp)
8564 {
8565         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8566                                           rdev, wdev, cookie, chan,
8567                                           duration, gfp);
8568 }
8569
8570 void nl80211_send_remain_on_channel_cancel(
8571         struct cfg80211_registered_device *rdev,
8572         struct wireless_dev *wdev,
8573         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
8574 {
8575         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8576                                           rdev, wdev, cookie, chan, 0, gfp);
8577 }
8578
8579 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8580                             struct net_device *dev, const u8 *mac_addr,
8581                             struct station_info *sinfo, gfp_t gfp)
8582 {
8583         struct sk_buff *msg;
8584
8585         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8586         if (!msg)
8587                 return;
8588
8589         if (nl80211_send_station(msg, 0, 0, 0,
8590                                  rdev, dev, mac_addr, sinfo) < 0) {
8591                 nlmsg_free(msg);
8592                 return;
8593         }
8594
8595         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8596                                 nl80211_mlme_mcgrp.id, gfp);
8597 }
8598
8599 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8600                                 struct net_device *dev, const u8 *mac_addr,
8601                                 gfp_t gfp)
8602 {
8603         struct sk_buff *msg;
8604         void *hdr;
8605
8606         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8607         if (!msg)
8608                 return;
8609
8610         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8611         if (!hdr) {
8612                 nlmsg_free(msg);
8613                 return;
8614         }
8615
8616         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8617             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8618                 goto nla_put_failure;
8619
8620         genlmsg_end(msg, hdr);
8621
8622         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8623                                 nl80211_mlme_mcgrp.id, gfp);
8624         return;
8625
8626  nla_put_failure:
8627         genlmsg_cancel(msg, hdr);
8628         nlmsg_free(msg);
8629 }
8630
8631 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
8632                                     struct net_device *dev, const u8 *mac_addr,
8633                                     enum nl80211_connect_failed_reason reason,
8634                                     gfp_t gfp)
8635 {
8636         struct sk_buff *msg;
8637         void *hdr;
8638
8639         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8640         if (!msg)
8641                 return;
8642
8643         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
8644         if (!hdr) {
8645                 nlmsg_free(msg);
8646                 return;
8647         }
8648
8649         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8650             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
8651             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
8652                 goto nla_put_failure;
8653
8654         genlmsg_end(msg, hdr);
8655
8656         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8657                                 nl80211_mlme_mcgrp.id, gfp);
8658         return;
8659
8660  nla_put_failure:
8661         genlmsg_cancel(msg, hdr);
8662         nlmsg_free(msg);
8663 }
8664
8665 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8666                                        const u8 *addr, gfp_t gfp)
8667 {
8668         struct wireless_dev *wdev = dev->ieee80211_ptr;
8669         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8670         struct sk_buff *msg;
8671         void *hdr;
8672         int err;
8673         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
8674
8675         if (!nlportid)
8676                 return false;
8677
8678         msg = nlmsg_new(100, gfp);
8679         if (!msg)
8680                 return true;
8681
8682         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8683         if (!hdr) {
8684                 nlmsg_free(msg);
8685                 return true;
8686         }
8687
8688         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8689             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8690             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8691                 goto nla_put_failure;
8692
8693         err = genlmsg_end(msg, hdr);
8694         if (err < 0) {
8695                 nlmsg_free(msg);
8696                 return true;
8697         }
8698
8699         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8700         return true;
8701
8702  nla_put_failure:
8703         genlmsg_cancel(msg, hdr);
8704         nlmsg_free(msg);
8705         return true;
8706 }
8707
8708 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8709 {
8710         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8711                                           addr, gfp);
8712 }
8713
8714 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8715                                     const u8 *addr, gfp_t gfp)
8716 {
8717         return __nl80211_unexpected_frame(dev,
8718                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8719                                           addr, gfp);
8720 }
8721
8722 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8723                       struct wireless_dev *wdev, u32 nlportid,
8724                       int freq, int sig_dbm,
8725                       const u8 *buf, size_t len, gfp_t gfp)
8726 {
8727         struct net_device *netdev = wdev->netdev;
8728         struct sk_buff *msg;
8729         void *hdr;
8730
8731         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8732         if (!msg)
8733                 return -ENOMEM;
8734
8735         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8736         if (!hdr) {
8737                 nlmsg_free(msg);
8738                 return -ENOMEM;
8739         }
8740
8741         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8742             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8743                                         netdev->ifindex)) ||
8744             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8745             (sig_dbm &&
8746              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8747             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8748                 goto nla_put_failure;
8749
8750         genlmsg_end(msg, hdr);
8751
8752         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8753
8754  nla_put_failure:
8755         genlmsg_cancel(msg, hdr);
8756         nlmsg_free(msg);
8757         return -ENOBUFS;
8758 }
8759
8760 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8761                                  struct wireless_dev *wdev, u64 cookie,
8762                                  const u8 *buf, size_t len, bool ack,
8763                                  gfp_t gfp)
8764 {
8765         struct net_device *netdev = wdev->netdev;
8766         struct sk_buff *msg;
8767         void *hdr;
8768
8769         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8770         if (!msg)
8771                 return;
8772
8773         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8774         if (!hdr) {
8775                 nlmsg_free(msg);
8776                 return;
8777         }
8778
8779         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8780             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8781                                    netdev->ifindex)) ||
8782             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8783             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8784             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8785                 goto nla_put_failure;
8786
8787         genlmsg_end(msg, hdr);
8788
8789         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8790         return;
8791
8792  nla_put_failure:
8793         genlmsg_cancel(msg, hdr);
8794         nlmsg_free(msg);
8795 }
8796
8797 void
8798 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8799                              struct net_device *netdev,
8800                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8801                              gfp_t gfp)
8802 {
8803         struct sk_buff *msg;
8804         struct nlattr *pinfoattr;
8805         void *hdr;
8806
8807         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8808         if (!msg)
8809                 return;
8810
8811         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8812         if (!hdr) {
8813                 nlmsg_free(msg);
8814                 return;
8815         }
8816
8817         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8818             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8819                 goto nla_put_failure;
8820
8821         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8822         if (!pinfoattr)
8823                 goto nla_put_failure;
8824
8825         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8826                         rssi_event))
8827                 goto nla_put_failure;
8828
8829         nla_nest_end(msg, pinfoattr);
8830
8831         genlmsg_end(msg, hdr);
8832
8833         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8834                                 nl80211_mlme_mcgrp.id, gfp);
8835         return;
8836
8837  nla_put_failure:
8838         genlmsg_cancel(msg, hdr);
8839         nlmsg_free(msg);
8840 }
8841
8842 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8843                               struct net_device *netdev, const u8 *bssid,
8844                               const u8 *replay_ctr, gfp_t gfp)
8845 {
8846         struct sk_buff *msg;
8847         struct nlattr *rekey_attr;
8848         void *hdr;
8849
8850         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8851         if (!msg)
8852                 return;
8853
8854         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8855         if (!hdr) {
8856                 nlmsg_free(msg);
8857                 return;
8858         }
8859
8860         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8861             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8862             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8863                 goto nla_put_failure;
8864
8865         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8866         if (!rekey_attr)
8867                 goto nla_put_failure;
8868
8869         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8870                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8871                 goto nla_put_failure;
8872
8873         nla_nest_end(msg, rekey_attr);
8874
8875         genlmsg_end(msg, hdr);
8876
8877         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8878                                 nl80211_mlme_mcgrp.id, gfp);
8879         return;
8880
8881  nla_put_failure:
8882         genlmsg_cancel(msg, hdr);
8883         nlmsg_free(msg);
8884 }
8885
8886 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8887                                     struct net_device *netdev, int index,
8888                                     const u8 *bssid, bool preauth, gfp_t gfp)
8889 {
8890         struct sk_buff *msg;
8891         struct nlattr *attr;
8892         void *hdr;
8893
8894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8895         if (!msg)
8896                 return;
8897
8898         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8899         if (!hdr) {
8900                 nlmsg_free(msg);
8901                 return;
8902         }
8903
8904         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8905             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8906                 goto nla_put_failure;
8907
8908         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8909         if (!attr)
8910                 goto nla_put_failure;
8911
8912         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8913             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8914             (preauth &&
8915              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8916                 goto nla_put_failure;
8917
8918         nla_nest_end(msg, attr);
8919
8920         genlmsg_end(msg, hdr);
8921
8922         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8923                                 nl80211_mlme_mcgrp.id, gfp);
8924         return;
8925
8926  nla_put_failure:
8927         genlmsg_cancel(msg, hdr);
8928         nlmsg_free(msg);
8929 }
8930
8931 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8932                               struct net_device *netdev,
8933                               struct cfg80211_chan_def *chandef, gfp_t gfp)
8934 {
8935         struct sk_buff *msg;
8936         void *hdr;
8937
8938         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8939         if (!msg)
8940                 return;
8941
8942         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8943         if (!hdr) {
8944                 nlmsg_free(msg);
8945                 return;
8946         }
8947
8948         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8949                 goto nla_put_failure;
8950
8951         if (nl80211_send_chandef(msg, chandef))
8952                 goto nla_put_failure;
8953
8954         genlmsg_end(msg, hdr);
8955
8956         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8957                                 nl80211_mlme_mcgrp.id, gfp);
8958         return;
8959
8960  nla_put_failure:
8961         genlmsg_cancel(msg, hdr);
8962         nlmsg_free(msg);
8963 }
8964
8965 void
8966 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
8967                             struct net_device *netdev, const u8 *peer,
8968                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
8969 {
8970         struct sk_buff *msg;
8971         struct nlattr *pinfoattr;
8972         void *hdr;
8973
8974         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8975         if (!msg)
8976                 return;
8977
8978         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8979         if (!hdr) {
8980                 nlmsg_free(msg);
8981                 return;
8982         }
8983
8984         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8985             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8986             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8987                 goto nla_put_failure;
8988
8989         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8990         if (!pinfoattr)
8991                 goto nla_put_failure;
8992
8993         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
8994                 goto nla_put_failure;
8995
8996         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
8997                 goto nla_put_failure;
8998
8999         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
9000                 goto nla_put_failure;
9001
9002         nla_nest_end(msg, pinfoattr);
9003
9004         genlmsg_end(msg, hdr);
9005
9006         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9007                                 nl80211_mlme_mcgrp.id, gfp);
9008         return;
9009
9010  nla_put_failure:
9011         genlmsg_cancel(msg, hdr);
9012         nlmsg_free(msg);
9013 }
9014
9015 void
9016 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
9017                                 struct net_device *netdev, const u8 *peer,
9018                                 u32 num_packets, gfp_t gfp)
9019 {
9020         struct sk_buff *msg;
9021         struct nlattr *pinfoattr;
9022         void *hdr;
9023
9024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9025         if (!msg)
9026                 return;
9027
9028         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9029         if (!hdr) {
9030                 nlmsg_free(msg);
9031                 return;
9032         }
9033
9034         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9035             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9036             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9037                 goto nla_put_failure;
9038
9039         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9040         if (!pinfoattr)
9041                 goto nla_put_failure;
9042
9043         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9044                 goto nla_put_failure;
9045
9046         nla_nest_end(msg, pinfoattr);
9047
9048         genlmsg_end(msg, hdr);
9049
9050         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9051                                 nl80211_mlme_mcgrp.id, gfp);
9052         return;
9053
9054  nla_put_failure:
9055         genlmsg_cancel(msg, hdr);
9056         nlmsg_free(msg);
9057 }
9058
9059 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9060                            u64 cookie, bool acked, gfp_t gfp)
9061 {
9062         struct wireless_dev *wdev = dev->ieee80211_ptr;
9063         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9064         struct sk_buff *msg;
9065         void *hdr;
9066         int err;
9067
9068         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9069
9070         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9071
9072         if (!msg)
9073                 return;
9074
9075         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9076         if (!hdr) {
9077                 nlmsg_free(msg);
9078                 return;
9079         }
9080
9081         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9082             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9083             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9084             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9085             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9086                 goto nla_put_failure;
9087
9088         err = genlmsg_end(msg, hdr);
9089         if (err < 0) {
9090                 nlmsg_free(msg);
9091                 return;
9092         }
9093
9094         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9095                                 nl80211_mlme_mcgrp.id, gfp);
9096         return;
9097
9098  nla_put_failure:
9099         genlmsg_cancel(msg, hdr);
9100         nlmsg_free(msg);
9101 }
9102 EXPORT_SYMBOL(cfg80211_probe_status);
9103
9104 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9105                                  const u8 *frame, size_t len,
9106                                  int freq, int sig_dbm)
9107 {
9108         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9109         struct sk_buff *msg;
9110         void *hdr;
9111         struct cfg80211_beacon_registration *reg;
9112
9113         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9114
9115         spin_lock_bh(&rdev->beacon_registrations_lock);
9116         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9117                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9118                 if (!msg) {
9119                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9120                         return;
9121                 }
9122
9123                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9124                 if (!hdr)
9125                         goto nla_put_failure;
9126
9127                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9128                     (freq &&
9129                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9130                     (sig_dbm &&
9131                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9132                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9133                         goto nla_put_failure;
9134
9135                 genlmsg_end(msg, hdr);
9136
9137                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9138         }
9139         spin_unlock_bh(&rdev->beacon_registrations_lock);
9140         return;
9141
9142  nla_put_failure:
9143         spin_unlock_bh(&rdev->beacon_registrations_lock);
9144         if (hdr)
9145                 genlmsg_cancel(msg, hdr);
9146         nlmsg_free(msg);
9147 }
9148 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9149
9150 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9151                                 enum nl80211_tdls_operation oper,
9152                                 u16 reason_code, gfp_t gfp)
9153 {
9154         struct wireless_dev *wdev = dev->ieee80211_ptr;
9155         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9156         struct sk_buff *msg;
9157         void *hdr;
9158         int err;
9159
9160         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9161                                          reason_code);
9162
9163         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9164         if (!msg)
9165                 return;
9166
9167         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9168         if (!hdr) {
9169                 nlmsg_free(msg);
9170                 return;
9171         }
9172
9173         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9174             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9175             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9176             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9177             (reason_code > 0 &&
9178              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9179                 goto nla_put_failure;
9180
9181         err = genlmsg_end(msg, hdr);
9182         if (err < 0) {
9183                 nlmsg_free(msg);
9184                 return;
9185         }
9186
9187         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9188                                 nl80211_mlme_mcgrp.id, gfp);
9189         return;
9190
9191  nla_put_failure:
9192         genlmsg_cancel(msg, hdr);
9193         nlmsg_free(msg);
9194 }
9195 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9196
9197 static int nl80211_netlink_notify(struct notifier_block * nb,
9198                                   unsigned long state,
9199                                   void *_notify)
9200 {
9201         struct netlink_notify *notify = _notify;
9202         struct cfg80211_registered_device *rdev;
9203         struct wireless_dev *wdev;
9204         struct cfg80211_beacon_registration *reg, *tmp;
9205
9206         if (state != NETLINK_URELEASE)
9207                 return NOTIFY_DONE;
9208
9209         rcu_read_lock();
9210
9211         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9212                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9213                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
9214
9215                 spin_lock_bh(&rdev->beacon_registrations_lock);
9216                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
9217                                          list) {
9218                         if (reg->nlportid == notify->portid) {
9219                                 list_del(&reg->list);
9220                                 kfree(reg);
9221                                 break;
9222                         }
9223                 }
9224                 spin_unlock_bh(&rdev->beacon_registrations_lock);
9225         }
9226
9227         rcu_read_unlock();
9228
9229         return NOTIFY_DONE;
9230 }
9231
9232 static struct notifier_block nl80211_netlink_notifier = {
9233         .notifier_call = nl80211_netlink_notify,
9234 };
9235
9236 /* initialisation/exit functions */
9237
9238 int nl80211_init(void)
9239 {
9240         int err;
9241
9242         err = genl_register_family_with_ops(&nl80211_fam,
9243                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
9244         if (err)
9245                 return err;
9246
9247         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
9248         if (err)
9249                 goto err_out;
9250
9251         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
9252         if (err)
9253                 goto err_out;
9254
9255         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
9256         if (err)
9257                 goto err_out;
9258
9259         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
9260         if (err)
9261                 goto err_out;
9262
9263 #ifdef CONFIG_NL80211_TESTMODE
9264         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
9265         if (err)
9266                 goto err_out;
9267 #endif
9268
9269         err = netlink_register_notifier(&nl80211_netlink_notifier);
9270         if (err)
9271                 goto err_out;
9272
9273         return 0;
9274  err_out:
9275         genl_unregister_family(&nl80211_fam);
9276         return err;
9277 }
9278
9279 void nl80211_exit(void)
9280 {
9281         netlink_unregister_notifier(&nl80211_netlink_notifier);
9282         genl_unregister_family(&nl80211_fam);
9283 }