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 };
 367
 368 /* policy for the key attributes */
 369 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 370         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 371         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 372         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 373         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 374         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 375         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 376         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 377         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 378 };
 379
 380 /* policy for the key default flags */
 381 static const struct nla_policy
 382 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 383         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 384         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 385 };
 386
 387 /* policy for WoWLAN attributes */
 388 static const struct nla_policy
 389 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 390         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 391         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 392         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 394         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 395         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 396         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 397         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 398 };
 399
 400 /* policy for GTK rekey offload attributes */
 401 static const struct nla_policy
 402 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 403         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 404         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 405         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 406 };
 407
 408 static const struct nla_policy
 409 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 410         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 411                                                  .len = IEEE80211_MAX_SSID_LEN },
 412         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 413 };
 414
 415 /* ifidx get helper */
 416 static int nl80211_get_ifidx(struct netlink_callback *cb)
 417 {
 418         int res;
 419
 420         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 421                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 422                           nl80211_policy);
 423         if (res)
 424                 return res;
 425
 426         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 427                 return -EINVAL;
 428
 429         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 430         if (!res)
 431                 return -EINVAL;
 432         return res;
 433 }
 434
 435 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 436                                        struct netlink_callback *cb,
 437                                        struct cfg80211_registered_device **rdev,
 438                                        struct net_device **dev)
 439 {
 440         int ifidx = cb->args[0];
 441         int err;
 442
 443         if (!ifidx)
 444                 ifidx = nl80211_get_ifidx(cb);
 445         if (ifidx < 0)
 446                 return ifidx;
 447
 448         cb->args[0] = ifidx;
 449
 450         rtnl_lock();
 451
 452         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 453         if (!*dev) {
 454                 err = -ENODEV;
 455                 goto out_rtnl;
 456         }
 457
 458         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 459         if (IS_ERR(*rdev)) {
 460                 err = PTR_ERR(*rdev);
 461                 goto out_rtnl;
 462         }
 463
 464         return 0;
 465  out_rtnl:
 466         rtnl_unlock();
 467         return err;
 468 }
 469
 470 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 471 {
 472         cfg80211_unlock_rdev(rdev);
 473         rtnl_unlock();
 474 }
 475
 476 /* IE validation */
 477 static bool is_valid_ie_attr(const struct nlattr *attr)
 478 {
 479         const u8 *pos;
 480         int len;
 481
 482         if (!attr)
 483                 return true;
 484
 485         pos = nla_data(attr);
 486         len = nla_len(attr);
 487
 488         while (len) {
 489                 u8 elemlen;
 490
 491                 if (len < 2)
 492                         return false;
 493                 len -= 2;
 494
 495                 elemlen = pos[1];
 496                 if (elemlen > len)
 497                         return false;
 498
 499                 len -= elemlen;
 500                 pos += 2 + elemlen;
 501         }
 502
 503         return true;
 504 }
 505
 506 /* message building helper */
 507 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 508                                    int flags, u8 cmd)
 509 {
 510         /* since there is no private header just add the generic one */
 511         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 512 }
 513
 514 static int nl80211_msg_put_channel(struct sk_buff *msg,
 515                                    struct ieee80211_channel *chan)
 516 {
 517         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 518                         chan->center_freq))
 519                 goto nla_put_failure;
 520
 521         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 522             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 523                 goto nla_put_failure;
 524         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 525             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 526                 goto nla_put_failure;
 527         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 528             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 529                 goto nla_put_failure;
 530         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 531             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 532                 goto nla_put_failure;
 533
 534         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 535                         DBM_TO_MBM(chan->max_power)))
 536                 goto nla_put_failure;
 537
 538         return 0;
 539
 540  nla_put_failure:
 541         return -ENOBUFS;
 542 }
 543
 544 /* netlink command implementations */
 545
 546 struct key_parse {
 547         struct key_params p;
 548         int idx;
 549         int type;
 550         bool def, defmgmt;
 551         bool def_uni, def_multi;
 552 };
 553
 554 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 555 {
 556         struct nlattr *tb[NL80211_KEY_MAX + 1];
 557         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 558                                    nl80211_key_policy);
 559         if (err)
 560                 return err;
 561
 562         k->def = !!tb[NL80211_KEY_DEFAULT];
 563         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 564
 565         if (k->def) {
 566                 k->def_uni = true;
 567                 k->def_multi = true;
 568         }
 569         if (k->defmgmt)
 570                 k->def_multi = true;
 571
 572         if (tb[NL80211_KEY_IDX])
 573                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 574
 575         if (tb[NL80211_KEY_DATA]) {
 576                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 577                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 578         }
 579
 580         if (tb[NL80211_KEY_SEQ]) {
 581                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 582                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 583         }
 584
 585         if (tb[NL80211_KEY_CIPHER])
 586                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 587
 588         if (tb[NL80211_KEY_TYPE]) {
 589                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 590                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 591                         return -EINVAL;
 592         }
 593
 594         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 595                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 596                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 597                                        tb[NL80211_KEY_DEFAULT_TYPES],
 598                                        nl80211_key_default_policy);
 599                 if (err)
 600                         return err;
 601
 602                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 603                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 604         }
 605
 606         return 0;
 607 }
 608
 609 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 610 {
 611         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 612                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 613                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 614         }
 615
 616         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 617                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 618                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 619         }
 620
 621         if (info->attrs[NL80211_ATTR_KEY_IDX])
 622                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 623
 624         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 625                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 626
 627         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 628         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 629
 630         if (k->def) {
 631                 k->def_uni = true;
 632                 k->def_multi = true;
 633         }
 634         if (k->defmgmt)
 635                 k->def_multi = true;
 636
 637         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 638                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 639                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 640                         return -EINVAL;
 641         }
 642
 643         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 644                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 645                 int err = nla_parse_nested(
 646                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 647                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 648                                 nl80211_key_default_policy);
 649                 if (err)
 650                         return err;
 651
 652                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 653                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 654         }
 655
 656         return 0;
 657 }
 658
 659 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 660 {
 661         int err;
 662
 663         memset(k, 0, sizeof(*k));
 664         k->idx = -1;
 665         k->type = -1;
 666
 667         if (info->attrs[NL80211_ATTR_KEY])
 668                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 669         else
 670                 err = nl80211_parse_key_old(info, k);
 671
 672         if (err)
 673                 return err;
 674
 675         if (k->def && k->defmgmt)
 676                 return -EINVAL;
 677
 678         if (k->defmgmt) {
 679                 if (k->def_uni || !k->def_multi)
 680                         return -EINVAL;
 681         }
 682
 683         if (k->idx != -1) {
 684                 if (k->defmgmt) {
 685                         if (k->idx < 4 || k->idx > 5)
 686                                 return -EINVAL;
 687                 } else if (k->def) {
 688                         if (k->idx < 0 || k->idx > 3)
 689                                 return -EINVAL;
 690                 } else {
 691                         if (k->idx < 0 || k->idx > 5)
 692                                 return -EINVAL;
 693                 }
 694         }
 695
 696         return 0;
 697 }
 698
 699 static struct cfg80211_cached_keys *
 700 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 701                        struct nlattr *keys, bool *no_ht)
 702 {
 703         struct key_parse parse;
 704         struct nlattr *key;
 705         struct cfg80211_cached_keys *result;
 706         int rem, err, def = 0;
 707
 708         result = kzalloc(sizeof(*result), GFP_KERNEL);
 709         if (!result)
 710                 return ERR_PTR(-ENOMEM);
 711
 712         result->def = -1;
 713         result->defmgmt = -1;
 714
 715         nla_for_each_nested(key, keys, rem) {
 716                 memset(&parse, 0, sizeof(parse));
 717                 parse.idx = -1;
 718
 719                 err = nl80211_parse_key_new(key, &parse);
 720                 if (err)
 721                         goto error;
 722                 err = -EINVAL;
 723                 if (!parse.p.key)
 724                         goto error;
 725                 if (parse.idx < 0 || parse.idx > 4)
 726                         goto error;
 727                 if (parse.def) {
 728                         if (def)
 729                                 goto error;
 730                         def = 1;
 731                         result->def = parse.idx;
 732                         if (!parse.def_uni || !parse.def_multi)
 733                                 goto error;
 734                 } else if (parse.defmgmt)
 735                         goto error;
 736                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 737                                                      parse.idx, false, NULL);
 738                 if (err)
 739                         goto error;
 740                 result->params[parse.idx].cipher = parse.p.cipher;
 741                 result->params[parse.idx].key_len = parse.p.key_len;
 742                 result->params[parse.idx].key = result->data[parse.idx];
 743                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 744
 745                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 746                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 747                         if (no_ht)
 748                                 *no_ht = true;
 749                 }
 750         }
 751
 752         return result;
 753  error:
 754         kfree(result);
 755         return ERR_PTR(err);
 756 }
 757
 758 static int nl80211_key_allowed(struct wireless_dev *wdev)
 759 {
 760         ASSERT_WDEV_LOCK(wdev);
 761
 762         switch (wdev->iftype) {
 763         case NL80211_IFTYPE_AP:
 764         case NL80211_IFTYPE_AP_VLAN:
 765         case NL80211_IFTYPE_P2P_GO:
 766         case NL80211_IFTYPE_MESH_POINT:
 767                 break;
 768         case NL80211_IFTYPE_ADHOC:
 769                 if (!wdev->current_bss)
 770                         return -ENOLINK;
 771                 break;
 772         case NL80211_IFTYPE_STATION:
 773         case NL80211_IFTYPE_P2P_CLIENT:
 774                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 775                         return -ENOLINK;
 776                 break;
 777         default:
 778                 return -EINVAL;
 779         }
 780
 781         return 0;
 782 }
 783
 784 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 785 {
 786         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 787         int i;
 788
 789         if (!nl_modes)
 790                 goto nla_put_failure;
 791
 792         i = 0;
 793         while (ifmodes) {
 794                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 795                         goto nla_put_failure;
 796                 ifmodes >>= 1;
 797                 i++;
 798         }
 799
 800         nla_nest_end(msg, nl_modes);
 801         return 0;
 802
 803 nla_put_failure:
 804         return -ENOBUFS;
 805 }
 806
 807 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 808                                           struct sk_buff *msg)
 809 {
 810         struct nlattr *nl_combis;
 811         int i, j;
 812
 813         nl_combis = nla_nest_start(msg,
 814                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 815         if (!nl_combis)
 816                 goto nla_put_failure;
 817
 818         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 819                 const struct ieee80211_iface_combination *c;
 820                 struct nlattr *nl_combi, *nl_limits;
 821
 822                 c = &wiphy->iface_combinations[i];
 823
 824                 nl_combi = nla_nest_start(msg, i + 1);
 825                 if (!nl_combi)
 826                         goto nla_put_failure;
 827
 828                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 829                 if (!nl_limits)
 830                         goto nla_put_failure;
 831
 832                 for (j = 0; j < c->n_limits; j++) {
 833                         struct nlattr *nl_limit;
 834
 835                         nl_limit = nla_nest_start(msg, j + 1);
 836                         if (!nl_limit)
 837                                 goto nla_put_failure;
 838                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 839                                         c->limits[j].max))
 840                                 goto nla_put_failure;
 841                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 842                                                 c->limits[j].types))
 843                                 goto nla_put_failure;
 844                         nla_nest_end(msg, nl_limit);
 845                 }
 846
 847                 nla_nest_end(msg, nl_limits);
 848
 849                 if (c->beacon_int_infra_match &&
 850                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 851                         goto nla_put_failure;
 852                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 853                                 c->num_different_channels) ||
 854                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 855                                 c->max_interfaces))
 856                         goto nla_put_failure;
 857
 858                 nla_nest_end(msg, nl_combi);
 859         }
 860
 861         nla_nest_end(msg, nl_combis);
 862
 863         return 0;
 864 nla_put_failure:
 865         return -ENOBUFS;
 866 }
 867
 868 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 869                               struct cfg80211_registered_device *dev)
 870 {
 871         void *hdr;
 872         struct nlattr *nl_bands, *nl_band;
 873         struct nlattr *nl_freqs, *nl_freq;
 874         struct nlattr *nl_rates, *nl_rate;
 875         struct nlattr *nl_cmds;
 876         enum ieee80211_band band;
 877         struct ieee80211_channel *chan;
 878         struct ieee80211_rate *rate;
 879         int i;
 880         const struct ieee80211_txrx_stypes *mgmt_stypes =
 881                                 dev->wiphy.mgmt_stypes;
 882
 883         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 884         if (!hdr)
 885                 return -1;
 886
 887         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 888             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 889             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 890                         cfg80211_rdev_list_generation) ||
 891             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 892                        dev->wiphy.retry_short) ||
 893             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 894                        dev->wiphy.retry_long) ||
 895             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 896                         dev->wiphy.frag_threshold) ||
 897             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 898                         dev->wiphy.rts_threshold) ||
 899             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 900                        dev->wiphy.coverage_class) ||
 901             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 902                        dev->wiphy.max_scan_ssids) ||
 903             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 904                        dev->wiphy.max_sched_scan_ssids) ||
 905             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 906                         dev->wiphy.max_scan_ie_len) ||
 907             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 908                         dev->wiphy.max_sched_scan_ie_len) ||
 909             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 910                        dev->wiphy.max_match_sets))
 911                 goto nla_put_failure;
 912
 913         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 914             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 915                 goto nla_put_failure;
 916         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 917             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 918                 goto nla_put_failure;
 919         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 920             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 921                 goto nla_put_failure;
 922         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 923             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 924                 goto nla_put_failure;
 925         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 926             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 927                 goto nla_put_failure;
 928         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 929             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 930                 goto nla_put_failure;
 931
 932         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 933                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 934                     dev->wiphy.cipher_suites))
 935                 goto nla_put_failure;
 936
 937         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 938                        dev->wiphy.max_num_pmkids))
 939                 goto nla_put_failure;
 940
 941         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 942             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 943                 goto nla_put_failure;
 944
 945         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 946                         dev->wiphy.available_antennas_tx) ||
 947             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 948                         dev->wiphy.available_antennas_rx))
 949                 goto nla_put_failure;
 950
 951         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 952             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 953                         dev->wiphy.probe_resp_offload))
 954                 goto nla_put_failure;
 955
 956         if ((dev->wiphy.available_antennas_tx ||
 957              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 958                 u32 tx_ant = 0, rx_ant = 0;
 959                 int res;
 960                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 961                 if (!res) {
 962                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 963                                         tx_ant) ||
 964                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 965                                         rx_ant))
 966                                 goto nla_put_failure;
 967                 }
 968         }
 969
 970         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 971                                 dev->wiphy.interface_modes))
 972                 goto nla_put_failure;
 973
 974         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 975         if (!nl_bands)
 976                 goto nla_put_failure;
 977
 978         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 979                 if (!dev->wiphy.bands[band])
 980                         continue;
 981
 982                 nl_band = nla_nest_start(msg, band);
 983                 if (!nl_band)
 984                         goto nla_put_failure;
 985
 986                 /* add HT info */
 987                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 988                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 989                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 990                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 991                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 992                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 993                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 994                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 995                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 996                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 997                         goto nla_put_failure;
 998
 999                 /* add VHT info */
1000                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1001                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1002                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1003                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1004                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1005                                  dev->wiphy.bands[band]->vht_cap.cap)))
1006                         goto nla_put_failure;
1007
1008                 /* add frequencies */
1009                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1010                 if (!nl_freqs)
1011                         goto nla_put_failure;
1012
1013                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1014                         nl_freq = nla_nest_start(msg, i);
1015                         if (!nl_freq)
1016                                 goto nla_put_failure;
1017
1018                         chan = &dev->wiphy.bands[band]->channels[i];
1019
1020                         if (nl80211_msg_put_channel(msg, chan))
1021                                 goto nla_put_failure;
1022
1023                         nla_nest_end(msg, nl_freq);
1024                 }
1025
1026                 nla_nest_end(msg, nl_freqs);
1027
1028                 /* add bitrates */
1029                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1030                 if (!nl_rates)
1031                         goto nla_put_failure;
1032
1033                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1034                         nl_rate = nla_nest_start(msg, i);
1035                         if (!nl_rate)
1036                                 goto nla_put_failure;
1037
1038                         rate = &dev->wiphy.bands[band]->bitrates[i];
1039                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1040                                         rate->bitrate))
1041                                 goto nla_put_failure;
1042                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1043                             nla_put_flag(msg,
1044                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1045                                 goto nla_put_failure;
1046
1047                         nla_nest_end(msg, nl_rate);
1048                 }
1049
1050                 nla_nest_end(msg, nl_rates);
1051
1052                 nla_nest_end(msg, nl_band);
1053         }
1054         nla_nest_end(msg, nl_bands);
1055
1056         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1057         if (!nl_cmds)
1058                 goto nla_put_failure;
1059
1060         i = 0;
1061 #define CMD(op, n)                                              \
1062          do {                                                   \
1063                 if (dev->ops->op) {                             \
1064                         i++;                                    \
1065                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1066                                 goto nla_put_failure;           \
1067                 }                                               \
1068         } while (0)
1069
1070         CMD(add_virtual_intf, NEW_INTERFACE);
1071         CMD(change_virtual_intf, SET_INTERFACE);
1072         CMD(add_key, NEW_KEY);
1073         CMD(start_ap, START_AP);
1074         CMD(add_station, NEW_STATION);
1075         CMD(add_mpath, NEW_MPATH);
1076         CMD(update_mesh_config, SET_MESH_CONFIG);
1077         CMD(change_bss, SET_BSS);
1078         CMD(auth, AUTHENTICATE);
1079         CMD(assoc, ASSOCIATE);
1080         CMD(deauth, DEAUTHENTICATE);
1081         CMD(disassoc, DISASSOCIATE);
1082         CMD(join_ibss, JOIN_IBSS);
1083         CMD(join_mesh, JOIN_MESH);
1084         CMD(set_pmksa, SET_PMKSA);
1085         CMD(del_pmksa, DEL_PMKSA);
1086         CMD(flush_pmksa, FLUSH_PMKSA);
1087         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1088                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1089         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1090         CMD(mgmt_tx, FRAME);
1091         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1092         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1093                 i++;
1094                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1095                         goto nla_put_failure;
1096         }
1097         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1098             dev->ops->join_mesh) {
1099                 i++;
1100                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1101                         goto nla_put_failure;
1102         }
1103         CMD(set_wds_peer, SET_WDS_PEER);
1104         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1105                 CMD(tdls_mgmt, TDLS_MGMT);
1106                 CMD(tdls_oper, TDLS_OPER);
1107         }
1108         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1109                 CMD(sched_scan_start, START_SCHED_SCAN);
1110         CMD(probe_client, PROBE_CLIENT);
1111         CMD(set_noack_map, SET_NOACK_MAP);
1112         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1113                 i++;
1114                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1115                         goto nla_put_failure;
1116         }
1117         CMD(start_p2p_device, START_P2P_DEVICE);
1118         CMD(set_mcast_rate, SET_MCAST_RATE);
1119
1120 #ifdef CONFIG_NL80211_TESTMODE
1121         CMD(testmode_cmd, TESTMODE);
1122 #endif
1123
1124 #undef CMD
1125
1126         if (dev->ops->connect || dev->ops->auth) {
1127                 i++;
1128                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1129                         goto nla_put_failure;
1130         }
1131
1132         if (dev->ops->disconnect || dev->ops->deauth) {
1133                 i++;
1134                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1135                         goto nla_put_failure;
1136         }
1137
1138         nla_nest_end(msg, nl_cmds);
1139
1140         if (dev->ops->remain_on_channel &&
1141             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1142             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1143                         dev->wiphy.max_remain_on_channel_duration))
1144                 goto nla_put_failure;
1145
1146         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1147             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1148                 goto nla_put_failure;
1149
1150         if (mgmt_stypes) {
1151                 u16 stypes;
1152                 struct nlattr *nl_ftypes, *nl_ifs;
1153                 enum nl80211_iftype ift;
1154
1155                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1156                 if (!nl_ifs)
1157                         goto nla_put_failure;
1158
1159                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1160                         nl_ftypes = nla_nest_start(msg, ift);
1161                         if (!nl_ftypes)
1162                                 goto nla_put_failure;
1163                         i = 0;
1164                         stypes = mgmt_stypes[ift].tx;
1165                         while (stypes) {
1166                                 if ((stypes & 1) &&
1167                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1168                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1169                                         goto nla_put_failure;
1170                                 stypes >>= 1;
1171                                 i++;
1172                         }
1173                         nla_nest_end(msg, nl_ftypes);
1174                 }
1175
1176                 nla_nest_end(msg, nl_ifs);
1177
1178                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1179                 if (!nl_ifs)
1180                         goto nla_put_failure;
1181
1182                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1183                         nl_ftypes = nla_nest_start(msg, ift);
1184                         if (!nl_ftypes)
1185                                 goto nla_put_failure;
1186                         i = 0;
1187                         stypes = mgmt_stypes[ift].rx;
1188                         while (stypes) {
1189                                 if ((stypes & 1) &&
1190                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1191                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1192                                         goto nla_put_failure;
1193                                 stypes >>= 1;
1194                                 i++;
1195                         }
1196                         nla_nest_end(msg, nl_ftypes);
1197                 }
1198                 nla_nest_end(msg, nl_ifs);
1199         }
1200
1201 #ifdef CONFIG_PM
1202         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1203                 struct nlattr *nl_wowlan;
1204
1205                 nl_wowlan = nla_nest_start(msg,
1206                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1207                 if (!nl_wowlan)
1208                         goto nla_put_failure;
1209
1210                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1211                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1212                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1213                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1214                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1215                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1216                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1217                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1218                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1219                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1220                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1221                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1222                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1224                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1226                     goto nla_put_failure;
1227                 if (dev->wiphy.wowlan.n_patterns) {
1228                         struct nl80211_wowlan_pattern_support pat = {
1229                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1230                                 .min_pattern_len =
1231                                         dev->wiphy.wowlan.pattern_min_len,
1232                                 .max_pattern_len =
1233                                         dev->wiphy.wowlan.pattern_max_len,
1234                         };
1235                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1236                                     sizeof(pat), &pat))
1237                                 goto nla_put_failure;
1238                 }
1239
1240                 nla_nest_end(msg, nl_wowlan);
1241         }
1242 #endif
1243
1244         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1245                                 dev->wiphy.software_iftypes))
1246                 goto nla_put_failure;
1247
1248         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1249                 goto nla_put_failure;
1250
1251         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1252             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1253                         dev->wiphy.ap_sme_capa))
1254                 goto nla_put_failure;
1255
1256         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1257                         dev->wiphy.features))
1258                 goto nla_put_failure;
1259
1260         if (dev->wiphy.ht_capa_mod_mask &&
1261             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1262                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1263                     dev->wiphy.ht_capa_mod_mask))
1264                 goto nla_put_failure;
1265
1266         return genlmsg_end(msg, hdr);
1267
1268  nla_put_failure:
1269         genlmsg_cancel(msg, hdr);
1270         return -EMSGSIZE;
1271 }
1272
1273 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1274 {
1275         int idx = 0;
1276         int start = cb->args[0];
1277         struct cfg80211_registered_device *dev;
1278
1279         mutex_lock(&cfg80211_mutex);
1280         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1281                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1282                         continue;
1283                 if (++idx <= start)
1284                         continue;
1285                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1286                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1287                                        dev) < 0) {
1288                         idx--;
1289                         break;
1290                 }
1291         }
1292         mutex_unlock(&cfg80211_mutex);
1293
1294         cb->args[0] = idx;
1295
1296         return skb->len;
1297 }
1298
1299 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1300 {
1301         struct sk_buff *msg;
1302         struct cfg80211_registered_device *dev = info->user_ptr[0];
1303
1304         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1305         if (!msg)
1306                 return -ENOMEM;
1307
1308         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1309                 nlmsg_free(msg);
1310                 return -ENOBUFS;
1311         }
1312
1313         return genlmsg_reply(msg, info);
1314 }
1315
1316 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1317         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1318         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1319         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1320         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1321         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1322 };
1323
1324 static int parse_txq_params(struct nlattr *tb[],
1325                             struct ieee80211_txq_params *txq_params)
1326 {
1327         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1328             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1329             !tb[NL80211_TXQ_ATTR_AIFS])
1330                 return -EINVAL;
1331
1332         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1333         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1334         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1335         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1336         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1337
1338         if (txq_params->ac >= NL80211_NUM_ACS)
1339                 return -EINVAL;
1340
1341         return 0;
1342 }
1343
1344 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1345 {
1346         /*
1347          * You can only set the channel explicitly for WDS interfaces,
1348          * all others have their channel managed via their respective
1349          * "establish a connection" command (connect, join, ...)
1350          *
1351          * For AP/GO and mesh mode, the channel can be set with the
1352          * channel userspace API, but is only stored and passed to the
1353          * low-level driver when the AP starts or the mesh is joined.
1354          * This is for backward compatibility, userspace can also give
1355          * the channel in the start-ap or join-mesh commands instead.
1356          *
1357          * Monitors are special as they are normally slaved to
1358          * whatever else is going on, so they have their own special
1359          * operation to set the monitor channel if possible.
1360          */
1361         return !wdev ||
1362                 wdev->iftype == NL80211_IFTYPE_AP ||
1363                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1364                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1365                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1366 }
1367
1368 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1369                                  struct genl_info *info,
1370                                  struct cfg80211_chan_def *chandef)
1371 {
1372         struct ieee80211_sta_ht_cap *ht_cap;
1373         struct ieee80211_sta_vht_cap *vht_cap;
1374         u32 control_freq, width;
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         ht_cap = &rdev->wiphy.bands[chandef->chan->band]->ht_cap;
1421         vht_cap = &rdev->wiphy.bands[chandef->chan->band]->vht_cap;
1422
1423         if (!cfg80211_chan_def_valid(chandef))
1424                 return -EINVAL;
1425
1426         switch (chandef->width) {
1427         case NL80211_CHAN_WIDTH_20:
1428                 if (!ht_cap->ht_supported)
1429                         return -EINVAL;
1430         case NL80211_CHAN_WIDTH_20_NOHT:
1431                 width = 20;
1432                 break;
1433         case NL80211_CHAN_WIDTH_40:
1434                 width = 40;
1435                 /* quick early regulatory check */
1436                 if (chandef->center_freq1 < control_freq &&
1437                     chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
1438                         return -EINVAL;
1439                 if (chandef->center_freq1 > control_freq &&
1440                     chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
1441                         return -EINVAL;
1442                 if (!ht_cap->ht_supported)
1443                         return -EINVAL;
1444                 if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
1445                     ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
1446                         return -EINVAL;
1447                 break;
1448         case NL80211_CHAN_WIDTH_80:
1449                 width = 80;
1450                 if (!vht_cap->vht_supported)
1451                         return -EINVAL;
1452                 break;
1453         case NL80211_CHAN_WIDTH_80P80:
1454                 width = 80;
1455                 if (!vht_cap->vht_supported)
1456                         return -EINVAL;
1457                 if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))
1458                         return -EINVAL;
1459                 break;
1460         case NL80211_CHAN_WIDTH_160:
1461                 width = 160;
1462                 if (!vht_cap->vht_supported)
1463                         return -EINVAL;
1464                 if (!(vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ))
1465                         return -EINVAL;
1466                 break;
1467         default:
1468                 return -EINVAL;
1469         }
1470
1471         if (!cfg80211_secondary_chans_ok(&rdev->wiphy, chandef->center_freq1,
1472                                          width, IEEE80211_CHAN_DISABLED))
1473                 return -EINVAL;
1474         if (chandef->center_freq2 &&
1475             !cfg80211_secondary_chans_ok(&rdev->wiphy, chandef->center_freq2,
1476                                          width, IEEE80211_CHAN_DISABLED))
1477                 return -EINVAL;
1478
1479         /* TODO: missing regulatory check on bandwidth */
1480
1481         return 0;
1482 }
1483
1484 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1485                                  struct wireless_dev *wdev,
1486                                  struct genl_info *info)
1487 {
1488         struct cfg80211_chan_def chandef;
1489         int result;
1490         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1491
1492         if (wdev)
1493                 iftype = wdev->iftype;
1494
1495         if (!nl80211_can_set_dev_channel(wdev))
1496                 return -EOPNOTSUPP;
1497
1498         result = nl80211_parse_chandef(rdev, info, &chandef);
1499         if (result)
1500                 return result;
1501
1502         mutex_lock(&rdev->devlist_mtx);
1503         switch (iftype) {
1504         case NL80211_IFTYPE_AP:
1505         case NL80211_IFTYPE_P2P_GO:
1506                 if (wdev->beacon_interval) {
1507                         result = -EBUSY;
1508                         break;
1509                 }
1510                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1511                         result = -EINVAL;
1512                         break;
1513                 }
1514                 wdev->preset_chandef = chandef;
1515                 result = 0;
1516                 break;
1517         case NL80211_IFTYPE_MESH_POINT:
1518                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1519                 break;
1520         case NL80211_IFTYPE_MONITOR:
1521                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1522                 break;
1523         default:
1524                 result = -EINVAL;
1525         }
1526         mutex_unlock(&rdev->devlist_mtx);
1527
1528         return result;
1529 }
1530
1531 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1532 {
1533         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1534         struct net_device *netdev = info->user_ptr[1];
1535
1536         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1537 }
1538
1539 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1540 {
1541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1542         struct net_device *dev = info->user_ptr[1];
1543         struct wireless_dev *wdev = dev->ieee80211_ptr;
1544         const u8 *bssid;
1545
1546         if (!info->attrs[NL80211_ATTR_MAC])
1547                 return -EINVAL;
1548
1549         if (netif_running(dev))
1550                 return -EBUSY;
1551
1552         if (!rdev->ops->set_wds_peer)
1553                 return -EOPNOTSUPP;
1554
1555         if (wdev->iftype != NL80211_IFTYPE_WDS)
1556                 return -EOPNOTSUPP;
1557
1558         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1559         return rdev_set_wds_peer(rdev, dev, bssid);
1560 }
1561
1562
1563 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1564 {
1565         struct cfg80211_registered_device *rdev;
1566         struct net_device *netdev = NULL;
1567         struct wireless_dev *wdev;
1568         int result = 0, rem_txq_params = 0;
1569         struct nlattr *nl_txq_params;
1570         u32 changed;
1571         u8 retry_short = 0, retry_long = 0;
1572         u32 frag_threshold = 0, rts_threshold = 0;
1573         u8 coverage_class = 0;
1574
1575         /*
1576          * Try to find the wiphy and netdev. Normally this
1577          * function shouldn't need the netdev, but this is
1578          * done for backward compatibility -- previously
1579          * setting the channel was done per wiphy, but now
1580          * it is per netdev. Previous userland like hostapd
1581          * also passed a netdev to set_wiphy, so that it is
1582          * possible to let that go to the right netdev!
1583          */
1584         mutex_lock(&cfg80211_mutex);
1585
1586         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1587                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1588
1589                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1590                 if (netdev && netdev->ieee80211_ptr) {
1591                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1592                         mutex_lock(&rdev->mtx);
1593                 } else
1594                         netdev = NULL;
1595         }
1596
1597         if (!netdev) {
1598                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1599                                                   info->attrs);
1600                 if (IS_ERR(rdev)) {
1601                         mutex_unlock(&cfg80211_mutex);
1602                         return PTR_ERR(rdev);
1603                 }
1604                 wdev = NULL;
1605                 netdev = NULL;
1606                 result = 0;
1607
1608                 mutex_lock(&rdev->mtx);
1609         } else
1610                 wdev = netdev->ieee80211_ptr;
1611
1612         /*
1613          * end workaround code, by now the rdev is available
1614          * and locked, and wdev may or may not be NULL.
1615          */
1616
1617         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1618                 result = cfg80211_dev_rename(
1619                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1620
1621         mutex_unlock(&cfg80211_mutex);
1622
1623         if (result)
1624                 goto bad_res;
1625
1626         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1627                 struct ieee80211_txq_params txq_params;
1628                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1629
1630                 if (!rdev->ops->set_txq_params) {
1631                         result = -EOPNOTSUPP;
1632                         goto bad_res;
1633                 }
1634
1635                 if (!netdev) {
1636                         result = -EINVAL;
1637                         goto bad_res;
1638                 }
1639
1640                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1641                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1642                         result = -EINVAL;
1643                         goto bad_res;
1644                 }
1645
1646                 if (!netif_running(netdev)) {
1647                         result = -ENETDOWN;
1648                         goto bad_res;
1649                 }
1650
1651                 nla_for_each_nested(nl_txq_params,
1652                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1653                                     rem_txq_params) {
1654                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1655                                   nla_data(nl_txq_params),
1656                                   nla_len(nl_txq_params),
1657                                   txq_params_policy);
1658                         result = parse_txq_params(tb, &txq_params);
1659                         if (result)
1660                                 goto bad_res;
1661
1662                         result = rdev_set_txq_params(rdev, netdev,
1663                                                      &txq_params);
1664                         if (result)
1665                                 goto bad_res;
1666                 }
1667         }
1668
1669         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1670                 result = __nl80211_set_channel(rdev,
1671                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1672                                 info);
1673                 if (result)
1674                         goto bad_res;
1675         }
1676
1677         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1678                 struct wireless_dev *txp_wdev = wdev;
1679                 enum nl80211_tx_power_setting type;
1680                 int idx, mbm = 0;
1681
1682                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1683                         txp_wdev = NULL;
1684
1685                 if (!rdev->ops->set_tx_power) {
1686                         result = -EOPNOTSUPP;
1687                         goto bad_res;
1688                 }
1689
1690                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1691                 type = nla_get_u32(info->attrs[idx]);
1692
1693                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1694                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1695                         result = -EINVAL;
1696                         goto bad_res;
1697                 }
1698
1699                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1700                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1701                         mbm = nla_get_u32(info->attrs[idx]);
1702                 }
1703
1704                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1705                 if (result)
1706                         goto bad_res;
1707         }
1708
1709         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1710             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1711                 u32 tx_ant, rx_ant;
1712                 if ((!rdev->wiphy.available_antennas_tx &&
1713                      !rdev->wiphy.available_antennas_rx) ||
1714                     !rdev->ops->set_antenna) {
1715                         result = -EOPNOTSUPP;
1716                         goto bad_res;
1717                 }
1718
1719                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1720                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1721
1722                 /* reject antenna configurations which don't match the
1723                  * available antenna masks, except for the "all" mask */
1724                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1725                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1726                         result = -EINVAL;
1727                         goto bad_res;
1728                 }
1729
1730                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1731                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1732
1733                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1734                 if (result)
1735                         goto bad_res;
1736         }
1737
1738         changed = 0;
1739
1740         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1741                 retry_short = nla_get_u8(
1742                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1743                 if (retry_short == 0) {
1744                         result = -EINVAL;
1745                         goto bad_res;
1746                 }
1747                 changed |= WIPHY_PARAM_RETRY_SHORT;
1748         }
1749
1750         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1751                 retry_long = nla_get_u8(
1752                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1753                 if (retry_long == 0) {
1754                         result = -EINVAL;
1755                         goto bad_res;
1756                 }
1757                 changed |= WIPHY_PARAM_RETRY_LONG;
1758         }
1759
1760         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1761                 frag_threshold = nla_get_u32(
1762                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1763                 if (frag_threshold < 256) {
1764                         result = -EINVAL;
1765                         goto bad_res;
1766                 }
1767                 if (frag_threshold != (u32) -1) {
1768                         /*
1769                          * Fragments (apart from the last one) are required to
1770                          * have even length. Make the fragmentation code
1771                          * simpler by stripping LSB should someone try to use
1772                          * odd threshold value.
1773                          */
1774                         frag_threshold &= ~0x1;
1775                 }
1776                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1777         }
1778
1779         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1780                 rts_threshold = nla_get_u32(
1781                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1782                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1783         }
1784
1785         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1786                 coverage_class = nla_get_u8(
1787                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1788                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1789         }
1790
1791         if (changed) {
1792                 u8 old_retry_short, old_retry_long;
1793                 u32 old_frag_threshold, old_rts_threshold;
1794                 u8 old_coverage_class;
1795
1796                 if (!rdev->ops->set_wiphy_params) {
1797                         result = -EOPNOTSUPP;
1798                         goto bad_res;
1799                 }
1800
1801                 old_retry_short = rdev->wiphy.retry_short;
1802                 old_retry_long = rdev->wiphy.retry_long;
1803                 old_frag_threshold = rdev->wiphy.frag_threshold;
1804                 old_rts_threshold = rdev->wiphy.rts_threshold;
1805                 old_coverage_class = rdev->wiphy.coverage_class;
1806
1807                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1808                         rdev->wiphy.retry_short = retry_short;
1809                 if (changed & WIPHY_PARAM_RETRY_LONG)
1810                         rdev->wiphy.retry_long = retry_long;
1811                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1812                         rdev->wiphy.frag_threshold = frag_threshold;
1813                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1814                         rdev->wiphy.rts_threshold = rts_threshold;
1815                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1816                         rdev->wiphy.coverage_class = coverage_class;
1817
1818                 result = rdev_set_wiphy_params(rdev, changed);
1819                 if (result) {
1820                         rdev->wiphy.retry_short = old_retry_short;
1821                         rdev->wiphy.retry_long = old_retry_long;
1822                         rdev->wiphy.frag_threshold = old_frag_threshold;
1823                         rdev->wiphy.rts_threshold = old_rts_threshold;
1824                         rdev->wiphy.coverage_class = old_coverage_class;
1825                 }
1826         }
1827
1828  bad_res:
1829         mutex_unlock(&rdev->mtx);
1830         if (netdev)
1831                 dev_put(netdev);
1832         return result;
1833 }
1834
1835 static inline u64 wdev_id(struct wireless_dev *wdev)
1836 {
1837         return (u64)wdev->identifier |
1838                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1839 }
1840
1841 static int nl80211_send_chandef(struct sk_buff *msg,
1842                                  struct cfg80211_chan_def *chandef)
1843 {
1844         WARN_ON(!cfg80211_chan_def_valid(chandef));
1845
1846         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1847                         chandef->chan->center_freq))
1848                 return -ENOBUFS;
1849         switch (chandef->width) {
1850         case NL80211_CHAN_WIDTH_20_NOHT:
1851         case NL80211_CHAN_WIDTH_20:
1852         case NL80211_CHAN_WIDTH_40:
1853                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1854                                 cfg80211_get_chandef_type(chandef)))
1855                         return -ENOBUFS;
1856                 break;
1857         default:
1858                 break;
1859         }
1860         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1861                 return -ENOBUFS;
1862         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1863                 return -ENOBUFS;
1864         if (chandef->center_freq2 &&
1865             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1866                 return -ENOBUFS;
1867         return 0;
1868 }
1869
1870 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1871                               struct cfg80211_registered_device *rdev,
1872                               struct wireless_dev *wdev)
1873 {
1874         struct net_device *dev = wdev->netdev;
1875         void *hdr;
1876
1877         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1878         if (!hdr)
1879                 return -1;
1880
1881         if (dev &&
1882             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1883              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1884                 goto nla_put_failure;
1885
1886         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1887             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1888             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1889             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1890             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1891                         rdev->devlist_generation ^
1892                         (cfg80211_rdev_list_generation << 2)))
1893                 goto nla_put_failure;
1894
1895         if (rdev->ops->get_channel) {
1896                 int ret;
1897                 struct cfg80211_chan_def chandef;
1898
1899                 ret = rdev_get_channel(rdev, wdev, &chandef);
1900                 if (ret == 0) {
1901                         if (nl80211_send_chandef(msg, &chandef))
1902                                 goto nla_put_failure;
1903                 }
1904         }
1905
1906         if (wdev->ssid_len) {
1907                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1908                         goto nla_put_failure;
1909         }
1910
1911         return genlmsg_end(msg, hdr);
1912
1913  nla_put_failure:
1914         genlmsg_cancel(msg, hdr);
1915         return -EMSGSIZE;
1916 }
1917
1918 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1919 {
1920         int wp_idx = 0;
1921         int if_idx = 0;
1922         int wp_start = cb->args[0];
1923         int if_start = cb->args[1];
1924         struct cfg80211_registered_device *rdev;
1925         struct wireless_dev *wdev;
1926
1927         mutex_lock(&cfg80211_mutex);
1928         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1929                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1930                         continue;
1931                 if (wp_idx < wp_start) {
1932                         wp_idx++;
1933                         continue;
1934                 }
1935                 if_idx = 0;
1936
1937                 mutex_lock(&rdev->devlist_mtx);
1938                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1939                         if (if_idx < if_start) {
1940                                 if_idx++;
1941                                 continue;
1942                         }
1943                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1944                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1945                                                rdev, wdev) < 0) {
1946                                 mutex_unlock(&rdev->devlist_mtx);
1947                                 goto out;
1948                         }
1949                         if_idx++;
1950                 }
1951                 mutex_unlock(&rdev->devlist_mtx);
1952
1953                 wp_idx++;
1954         }
1955  out:
1956         mutex_unlock(&cfg80211_mutex);
1957
1958         cb->args[0] = wp_idx;
1959         cb->args[1] = if_idx;
1960
1961         return skb->len;
1962 }
1963
1964 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1965 {
1966         struct sk_buff *msg;
1967         struct cfg80211_registered_device *dev = info->user_ptr[0];
1968         struct wireless_dev *wdev = info->user_ptr[1];
1969
1970         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1971         if (!msg)
1972                 return -ENOMEM;
1973
1974         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1975                                dev, wdev) < 0) {
1976                 nlmsg_free(msg);
1977                 return -ENOBUFS;
1978         }
1979
1980         return genlmsg_reply(msg, info);
1981 }
1982
1983 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1984         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1985         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1986         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1987         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1988         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1989 };
1990
1991 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1992 {
1993         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1994         int flag;
1995
1996         *mntrflags = 0;
1997
1998         if (!nla)
1999                 return -EINVAL;
2000
2001         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2002                              nla, mntr_flags_policy))
2003                 return -EINVAL;
2004
2005         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2006                 if (flags[flag])
2007                         *mntrflags |= (1<<flag);
2008
2009         return 0;
2010 }
2011
2012 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2013                                struct net_device *netdev, u8 use_4addr,
2014                                enum nl80211_iftype iftype)
2015 {
2016         if (!use_4addr) {
2017                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2018                         return -EBUSY;
2019                 return 0;
2020         }
2021
2022         switch (iftype) {
2023         case NL80211_IFTYPE_AP_VLAN:
2024                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2025                         return 0;
2026                 break;
2027         case NL80211_IFTYPE_STATION:
2028                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2029                         return 0;
2030                 break;
2031         default:
2032                 break;
2033         }
2034
2035         return -EOPNOTSUPP;
2036 }
2037
2038 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2039 {
2040         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2041         struct vif_params params;
2042         int err;
2043         enum nl80211_iftype otype, ntype;
2044         struct net_device *dev = info->user_ptr[1];
2045         u32 _flags, *flags = NULL;
2046         bool change = false;
2047
2048         memset(&params, 0, sizeof(params));
2049
2050         otype = ntype = dev->ieee80211_ptr->iftype;
2051
2052         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2053                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2054                 if (otype != ntype)
2055                         change = true;
2056                 if (ntype > NL80211_IFTYPE_MAX)
2057                         return -EINVAL;
2058         }
2059
2060         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2061                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2062
2063                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2064                         return -EINVAL;
2065                 if (netif_running(dev))
2066                         return -EBUSY;
2067
2068                 wdev_lock(wdev);
2069                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2070                              IEEE80211_MAX_MESH_ID_LEN);
2071                 wdev->mesh_id_up_len =
2072                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2073                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2074                        wdev->mesh_id_up_len);
2075                 wdev_unlock(wdev);
2076         }
2077
2078         if (info->attrs[NL80211_ATTR_4ADDR]) {
2079                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2080                 change = true;
2081                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2082                 if (err)
2083                         return err;
2084         } else {
2085                 params.use_4addr = -1;
2086         }
2087
2088         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2089                 if (ntype != NL80211_IFTYPE_MONITOR)
2090                         return -EINVAL;
2091                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2092                                           &_flags);
2093                 if (err)
2094                         return err;
2095
2096                 flags = &_flags;
2097                 change = true;
2098         }
2099
2100         if (change)
2101                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2102         else
2103                 err = 0;
2104
2105         if (!err && params.use_4addr != -1)
2106                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2107
2108         return err;
2109 }
2110
2111 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2112 {
2113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2114         struct vif_params params;
2115         struct wireless_dev *wdev;
2116         struct sk_buff *msg;
2117         int err;
2118         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2119         u32 flags;
2120
2121         memset(&params, 0, sizeof(params));
2122
2123         if (!info->attrs[NL80211_ATTR_IFNAME])
2124                 return -EINVAL;
2125
2126         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2127                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2128                 if (type > NL80211_IFTYPE_MAX)
2129                         return -EINVAL;
2130         }
2131
2132         if (!rdev->ops->add_virtual_intf ||
2133             !(rdev->wiphy.interface_modes & (1 << type)))
2134                 return -EOPNOTSUPP;
2135
2136         if (info->attrs[NL80211_ATTR_4ADDR]) {
2137                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2138                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2139                 if (err)
2140                         return err;
2141         }
2142
2143         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2144         if (!msg)
2145                 return -ENOMEM;
2146
2147         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2148                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2149                                   &flags);
2150         wdev = rdev_add_virtual_intf(rdev,
2151                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2152                                 type, err ? NULL : &flags, &params);
2153         if (IS_ERR(wdev)) {
2154                 nlmsg_free(msg);
2155                 return PTR_ERR(wdev);
2156         }
2157
2158         switch (type) {
2159         case NL80211_IFTYPE_MESH_POINT:
2160                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2161                         break;
2162                 wdev_lock(wdev);
2163                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2164                              IEEE80211_MAX_MESH_ID_LEN);
2165                 wdev->mesh_id_up_len =
2166                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2167                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2168                        wdev->mesh_id_up_len);
2169                 wdev_unlock(wdev);
2170                 break;
2171         case NL80211_IFTYPE_P2P_DEVICE:
2172                 /*
2173                  * P2P Device doesn't have a netdev, so doesn't go
2174                  * through the netdev notifier and must be added here
2175                  */
2176                 mutex_init(&wdev->mtx);
2177                 INIT_LIST_HEAD(&wdev->event_list);
2178                 spin_lock_init(&wdev->event_lock);
2179                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2180                 spin_lock_init(&wdev->mgmt_registrations_lock);
2181
2182                 mutex_lock(&rdev->devlist_mtx);
2183                 wdev->identifier = ++rdev->wdev_id;
2184                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2185                 rdev->devlist_generation++;
2186                 mutex_unlock(&rdev->devlist_mtx);
2187                 break;
2188         default:
2189                 break;
2190         }
2191
2192         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2193                                rdev, wdev) < 0) {
2194                 nlmsg_free(msg);
2195                 return -ENOBUFS;
2196         }
2197
2198         return genlmsg_reply(msg, info);
2199 }
2200
2201 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2202 {
2203         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2204         struct wireless_dev *wdev = info->user_ptr[1];
2205
2206         if (!rdev->ops->del_virtual_intf)
2207                 return -EOPNOTSUPP;
2208
2209         /*
2210          * If we remove a wireless device without a netdev then clear
2211          * user_ptr[1] so that nl80211_post_doit won't dereference it
2212          * to check if it needs to do dev_put(). Otherwise it crashes
2213          * since the wdev has been freed, unlike with a netdev where
2214          * we need the dev_put() for the netdev to really be freed.
2215          */
2216         if (!wdev->netdev)
2217                 info->user_ptr[1] = NULL;
2218
2219         return rdev_del_virtual_intf(rdev, wdev);
2220 }
2221
2222 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2223 {
2224         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2225         struct net_device *dev = info->user_ptr[1];
2226         u16 noack_map;
2227
2228         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2229                 return -EINVAL;
2230
2231         if (!rdev->ops->set_noack_map)
2232                 return -EOPNOTSUPP;
2233
2234         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2235
2236         return rdev_set_noack_map(rdev, dev, noack_map);
2237 }
2238
2239 struct get_key_cookie {
2240         struct sk_buff *msg;
2241         int error;
2242         int idx;
2243 };
2244
2245 static void get_key_callback(void *c, struct key_params *params)
2246 {
2247         struct nlattr *key;
2248         struct get_key_cookie *cookie = c;
2249
2250         if ((params->key &&
2251              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2252                      params->key_len, params->key)) ||
2253             (params->seq &&
2254              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2255                      params->seq_len, params->seq)) ||
2256             (params->cipher &&
2257              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2258                          params->cipher)))
2259                 goto nla_put_failure;
2260
2261         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2262         if (!key)
2263                 goto nla_put_failure;
2264
2265         if ((params->key &&
2266              nla_put(cookie->msg, NL80211_KEY_DATA,
2267                      params->key_len, params->key)) ||
2268             (params->seq &&
2269              nla_put(cookie->msg, NL80211_KEY_SEQ,
2270                      params->seq_len, params->seq)) ||
2271             (params->cipher &&
2272              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2273                          params->cipher)))
2274                 goto nla_put_failure;
2275
2276         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2277                 goto nla_put_failure;
2278
2279         nla_nest_end(cookie->msg, key);
2280
2281         return;
2282  nla_put_failure:
2283         cookie->error = 1;
2284 }
2285
2286 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2287 {
2288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2289         int err;
2290         struct net_device *dev = info->user_ptr[1];
2291         u8 key_idx = 0;
2292         const u8 *mac_addr = NULL;
2293         bool pairwise;
2294         struct get_key_cookie cookie = {
2295                 .error = 0,
2296         };
2297         void *hdr;
2298         struct sk_buff *msg;
2299
2300         if (info->attrs[NL80211_ATTR_KEY_IDX])
2301                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2302
2303         if (key_idx > 5)
2304                 return -EINVAL;
2305
2306         if (info->attrs[NL80211_ATTR_MAC])
2307                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2308
2309         pairwise = !!mac_addr;
2310         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2311                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2312                 if (kt >= NUM_NL80211_KEYTYPES)
2313                         return -EINVAL;
2314                 if (kt != NL80211_KEYTYPE_GROUP &&
2315                     kt != NL80211_KEYTYPE_PAIRWISE)
2316                         return -EINVAL;
2317                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2318         }
2319
2320         if (!rdev->ops->get_key)
2321                 return -EOPNOTSUPP;
2322
2323         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2324         if (!msg)
2325                 return -ENOMEM;
2326
2327         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2328                              NL80211_CMD_NEW_KEY);
2329         if (IS_ERR(hdr))
2330                 return PTR_ERR(hdr);
2331
2332         cookie.msg = msg;
2333         cookie.idx = key_idx;
2334
2335         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2336             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2337                 goto nla_put_failure;
2338         if (mac_addr &&
2339             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2340                 goto nla_put_failure;
2341
2342         if (pairwise && mac_addr &&
2343             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2344                 return -ENOENT;
2345
2346         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2347                            get_key_callback);
2348
2349         if (err)
2350                 goto free_msg;
2351
2352         if (cookie.error)
2353                 goto nla_put_failure;
2354
2355         genlmsg_end(msg, hdr);
2356         return genlmsg_reply(msg, info);
2357
2358  nla_put_failure:
2359         err = -ENOBUFS;
2360  free_msg:
2361         nlmsg_free(msg);
2362         return err;
2363 }
2364
2365 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2366 {
2367         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2368         struct key_parse key;
2369         int err;
2370         struct net_device *dev = info->user_ptr[1];
2371
2372         err = nl80211_parse_key(info, &key);
2373         if (err)
2374                 return err;
2375
2376         if (key.idx < 0)
2377                 return -EINVAL;
2378
2379         /* only support setting default key */
2380         if (!key.def && !key.defmgmt)
2381                 return -EINVAL;
2382
2383         wdev_lock(dev->ieee80211_ptr);
2384
2385         if (key.def) {
2386                 if (!rdev->ops->set_default_key) {
2387                         err = -EOPNOTSUPP;
2388                         goto out;
2389                 }
2390
2391                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2392                 if (err)
2393                         goto out;
2394
2395                 err = rdev_set_default_key(rdev, dev, key.idx,
2396                                                  key.def_uni, key.def_multi);
2397
2398                 if (err)
2399                         goto out;
2400
2401 #ifdef CONFIG_CFG80211_WEXT
2402                 dev->ieee80211_ptr->wext.default_key = key.idx;
2403 #endif
2404         } else {
2405                 if (key.def_uni || !key.def_multi) {
2406                         err = -EINVAL;
2407                         goto out;
2408                 }
2409
2410                 if (!rdev->ops->set_default_mgmt_key) {
2411                         err = -EOPNOTSUPP;
2412                         goto out;
2413                 }
2414
2415                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2416                 if (err)
2417                         goto out;
2418
2419                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2420                 if (err)
2421                         goto out;
2422
2423 #ifdef CONFIG_CFG80211_WEXT
2424                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2425 #endif
2426         }
2427
2428  out:
2429         wdev_unlock(dev->ieee80211_ptr);
2430
2431         return err;
2432 }
2433
2434 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2435 {
2436         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2437         int err;
2438         struct net_device *dev = info->user_ptr[1];
2439         struct key_parse key;
2440         const u8 *mac_addr = NULL;
2441
2442         err = nl80211_parse_key(info, &key);
2443         if (err)
2444                 return err;
2445
2446         if (!key.p.key)
2447                 return -EINVAL;
2448
2449         if (info->attrs[NL80211_ATTR_MAC])
2450                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2451
2452         if (key.type == -1) {
2453                 if (mac_addr)
2454                         key.type = NL80211_KEYTYPE_PAIRWISE;
2455                 else
2456                         key.type = NL80211_KEYTYPE_GROUP;
2457         }
2458
2459         /* for now */
2460         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2461             key.type != NL80211_KEYTYPE_GROUP)
2462                 return -EINVAL;
2463
2464         if (!rdev->ops->add_key)
2465                 return -EOPNOTSUPP;
2466
2467         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2468                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2469                                            mac_addr))
2470                 return -EINVAL;
2471
2472         wdev_lock(dev->ieee80211_ptr);
2473         err = nl80211_key_allowed(dev->ieee80211_ptr);
2474         if (!err)
2475                 err = rdev_add_key(rdev, dev, key.idx,
2476                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2477                                     mac_addr, &key.p);
2478         wdev_unlock(dev->ieee80211_ptr);
2479
2480         return err;
2481 }
2482
2483 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2484 {
2485         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2486         int err;
2487         struct net_device *dev = info->user_ptr[1];
2488         u8 *mac_addr = NULL;
2489         struct key_parse key;
2490
2491         err = nl80211_parse_key(info, &key);
2492         if (err)
2493                 return err;
2494
2495         if (info->attrs[NL80211_ATTR_MAC])
2496                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2497
2498         if (key.type == -1) {
2499                 if (mac_addr)
2500                         key.type = NL80211_KEYTYPE_PAIRWISE;
2501                 else
2502                         key.type = NL80211_KEYTYPE_GROUP;
2503         }
2504
2505         /* for now */
2506         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2507             key.type != NL80211_KEYTYPE_GROUP)
2508                 return -EINVAL;
2509
2510         if (!rdev->ops->del_key)
2511                 return -EOPNOTSUPP;
2512
2513         wdev_lock(dev->ieee80211_ptr);
2514         err = nl80211_key_allowed(dev->ieee80211_ptr);
2515
2516         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2517             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2518                 err = -ENOENT;
2519
2520         if (!err)
2521                 err = rdev_del_key(rdev, dev, key.idx,
2522                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2523                                    mac_addr);
2524
2525 #ifdef CONFIG_CFG80211_WEXT
2526         if (!err) {
2527                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2528                         dev->ieee80211_ptr->wext.default_key = -1;
2529                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2530                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2531         }
2532 #endif
2533         wdev_unlock(dev->ieee80211_ptr);
2534
2535         return err;
2536 }
2537
2538 static int nl80211_parse_beacon(struct genl_info *info,
2539                                 struct cfg80211_beacon_data *bcn)
2540 {
2541         bool haveinfo = false;
2542
2543         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2544             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2545             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2546             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2547                 return -EINVAL;
2548
2549         memset(bcn, 0, sizeof(*bcn));
2550
2551         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2552                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2553                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2554                 if (!bcn->head_len)
2555                         return -EINVAL;
2556                 haveinfo = true;
2557         }
2558
2559         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2560                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2561                 bcn->tail_len =
2562                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2563                 haveinfo = true;
2564         }
2565
2566         if (!haveinfo)
2567                 return -EINVAL;
2568
2569         if (info->attrs[NL80211_ATTR_IE]) {
2570                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2571                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2572         }
2573
2574         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2575                 bcn->proberesp_ies =
2576                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2577                 bcn->proberesp_ies_len =
2578                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2579         }
2580
2581         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2582                 bcn->assocresp_ies =
2583                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2584                 bcn->assocresp_ies_len =
2585                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2586         }
2587
2588         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2589                 bcn->probe_resp =
2590                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2591                 bcn->probe_resp_len =
2592                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2593         }
2594
2595         return 0;
2596 }
2597
2598 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2599                                    struct cfg80211_ap_settings *params)
2600 {
2601         struct wireless_dev *wdev;
2602         bool ret = false;
2603
2604         mutex_lock(&rdev->devlist_mtx);
2605
2606         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2607                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2608                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2609                         continue;
2610
2611                 if (!wdev->preset_chandef.chan)
2612                         continue;
2613
2614                 params->chandef = wdev->preset_chandef;
2615                 ret = true;
2616                 break;
2617         }
2618
2619         mutex_unlock(&rdev->devlist_mtx);
2620
2621         return ret;
2622 }
2623
2624 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2625                                     enum nl80211_auth_type auth_type,
2626                                     enum nl80211_commands cmd)
2627 {
2628         if (auth_type > NL80211_AUTHTYPE_MAX)
2629                 return false;
2630
2631         switch (cmd) {
2632         case NL80211_CMD_AUTHENTICATE:
2633                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2634                     auth_type == NL80211_AUTHTYPE_SAE)
2635                         return false;
2636                 return true;
2637         case NL80211_CMD_CONNECT:
2638         case NL80211_CMD_START_AP:
2639                 /* SAE not supported yet */
2640                 if (auth_type == NL80211_AUTHTYPE_SAE)
2641                         return false;
2642                 return true;
2643         default:
2644                 return false;
2645         }
2646 }
2647
2648 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2649 {
2650         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2651         struct net_device *dev = info->user_ptr[1];
2652         struct wireless_dev *wdev = dev->ieee80211_ptr;
2653         struct cfg80211_ap_settings params;
2654         int err;
2655
2656         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2657             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2658                 return -EOPNOTSUPP;
2659
2660         if (!rdev->ops->start_ap)
2661                 return -EOPNOTSUPP;
2662
2663         if (wdev->beacon_interval)
2664                 return -EALREADY;
2665
2666         memset(&params, 0, sizeof(params));
2667
2668         /* these are required for START_AP */
2669         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2670             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2671             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2672                 return -EINVAL;
2673
2674         err = nl80211_parse_beacon(info, &params.beacon);
2675         if (err)
2676                 return err;
2677
2678         params.beacon_interval =
2679                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2680         params.dtim_period =
2681                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2682
2683         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2684         if (err)
2685                 return err;
2686
2687         /*
2688          * In theory, some of these attributes should be required here
2689          * but since they were not used when the command was originally
2690          * added, keep them optional for old user space programs to let
2691          * them continue to work with drivers that do not need the
2692          * additional information -- drivers must check!
2693          */
2694         if (info->attrs[NL80211_ATTR_SSID]) {
2695                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2696                 params.ssid_len =
2697                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2698                 if (params.ssid_len == 0 ||
2699                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2700                         return -EINVAL;
2701         }
2702
2703         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2704                 params.hidden_ssid = nla_get_u32(
2705                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2706                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2707                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2708                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2709                         return -EINVAL;
2710         }
2711
2712         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2713
2714         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2715                 params.auth_type = nla_get_u32(
2716                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2717                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2718                                              NL80211_CMD_START_AP))
2719                         return -EINVAL;
2720         } else
2721                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2722
2723         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2724                                       NL80211_MAX_NR_CIPHER_SUITES);
2725         if (err)
2726                 return err;
2727
2728         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2729                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2730                         return -EOPNOTSUPP;
2731                 params.inactivity_timeout = nla_get_u16(
2732                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2733         }
2734
2735         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2736                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2737                 if (err)
2738                         return err;
2739         } else if (wdev->preset_chandef.chan) {
2740                 params.chandef = wdev->preset_chandef;
2741         } else if (!nl80211_get_ap_channel(rdev, &params))
2742                 return -EINVAL;
2743
2744         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2745                 return -EINVAL;
2746
2747         mutex_lock(&rdev->devlist_mtx);
2748         err = cfg80211_can_use_chan(rdev, wdev, params.chandef.chan,
2749                                     CHAN_MODE_SHARED);
2750         mutex_unlock(&rdev->devlist_mtx);
2751
2752         if (err)
2753                 return err;
2754
2755         err = rdev_start_ap(rdev, dev, &params);
2756         if (!err) {
2757                 wdev->preset_chandef = params.chandef;
2758                 wdev->beacon_interval = params.beacon_interval;
2759                 wdev->channel = params.chandef.chan;
2760                 wdev->ssid_len = params.ssid_len;
2761                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2762         }
2763         return err;
2764 }
2765
2766 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2767 {
2768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2769         struct net_device *dev = info->user_ptr[1];
2770         struct wireless_dev *wdev = dev->ieee80211_ptr;
2771         struct cfg80211_beacon_data params;
2772         int err;
2773
2774         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2775             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2776                 return -EOPNOTSUPP;
2777
2778         if (!rdev->ops->change_beacon)
2779                 return -EOPNOTSUPP;
2780
2781         if (!wdev->beacon_interval)
2782                 return -EINVAL;
2783
2784         err = nl80211_parse_beacon(info, &params);
2785         if (err)
2786                 return err;
2787
2788         return rdev_change_beacon(rdev, dev, &params);
2789 }
2790
2791 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2792 {
2793         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2794         struct net_device *dev = info->user_ptr[1];
2795
2796         return cfg80211_stop_ap(rdev, dev);
2797 }
2798
2799 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2800         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2801         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2802         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2803         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2804         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2805         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2806 };
2807
2808 static int parse_station_flags(struct genl_info *info,
2809                                enum nl80211_iftype iftype,
2810                                struct station_parameters *params)
2811 {
2812         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2813         struct nlattr *nla;
2814         int flag;
2815
2816         /*
2817          * Try parsing the new attribute first so userspace
2818          * can specify both for older kernels.
2819          */
2820         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2821         if (nla) {
2822                 struct nl80211_sta_flag_update *sta_flags;
2823
2824                 sta_flags = nla_data(nla);
2825                 params->sta_flags_mask = sta_flags->mask;
2826                 params->sta_flags_set = sta_flags->set;
2827                 if ((params->sta_flags_mask |
2828                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2829                         return -EINVAL;
2830                 return 0;
2831         }
2832
2833         /* if present, parse the old attribute */
2834
2835         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2836         if (!nla)
2837                 return 0;
2838
2839         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2840                              nla, sta_flags_policy))
2841                 return -EINVAL;
2842
2843         /*
2844          * Only allow certain flags for interface types so that
2845          * other attributes are silently ignored. Remember that
2846          * this is backward compatibility code with old userspace
2847          * and shouldn't be hit in other cases anyway.
2848          */
2849         switch (iftype) {
2850         case NL80211_IFTYPE_AP:
2851         case NL80211_IFTYPE_AP_VLAN:
2852         case NL80211_IFTYPE_P2P_GO:
2853                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2854                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2855                                          BIT(NL80211_STA_FLAG_WME) |
2856                                          BIT(NL80211_STA_FLAG_MFP);
2857                 break;
2858         case NL80211_IFTYPE_P2P_CLIENT:
2859         case NL80211_IFTYPE_STATION:
2860                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2861                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2862                 break;
2863         case NL80211_IFTYPE_MESH_POINT:
2864                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2865                                          BIT(NL80211_STA_FLAG_MFP) |
2866                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2867         default:
2868                 return -EINVAL;
2869         }
2870
2871         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2872                 if (flags[flag]) {
2873                         params->sta_flags_set |= (1<<flag);
2874
2875                         /* no longer support new API additions in old API */
2876                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2877                                 return -EINVAL;
2878                 }
2879         }
2880
2881         return 0;
2882 }
2883
2884 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2885                                  int attr)
2886 {
2887         struct nlattr *rate;
2888         u32 bitrate;
2889         u16 bitrate_compat;
2890
2891         rate = nla_nest_start(msg, attr);
2892         if (!rate)
2893                 return false;
2894
2895         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2896         bitrate = cfg80211_calculate_bitrate(info);
2897         /* report 16-bit bitrate only if we can */
2898         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2899         if (bitrate > 0 &&
2900             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
2901                 return false;
2902         if (bitrate_compat > 0 &&
2903             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
2904                 return false;
2905
2906         if (info->flags & RATE_INFO_FLAGS_MCS) {
2907                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
2908                         return false;
2909                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2910                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2911                         return false;
2912                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2913                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2914                         return false;
2915         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
2916                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
2917                         return false;
2918                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
2919                         return false;
2920                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2921                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2922                         return false;
2923                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
2924                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
2925                         return false;
2926                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
2927                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
2928                         return false;
2929                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
2930                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
2931                         return false;
2932                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2933                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2934                         return false;
2935         }
2936
2937         nla_nest_end(msg, rate);
2938         return true;
2939 }
2940
2941 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
2942                                 int flags,
2943                                 struct cfg80211_registered_device *rdev,
2944                                 struct net_device *dev,
2945                                 const u8 *mac_addr, struct station_info *sinfo)
2946 {
2947         void *hdr;
2948         struct nlattr *sinfoattr, *bss_param;
2949
2950         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
2951         if (!hdr)
2952                 return -1;
2953
2954         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2955             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2956             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2957                 goto nla_put_failure;
2958
2959         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2960         if (!sinfoattr)
2961                 goto nla_put_failure;
2962         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2963             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2964                         sinfo->connected_time))
2965                 goto nla_put_failure;
2966         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2967             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2968                         sinfo->inactive_time))
2969                 goto nla_put_failure;
2970         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2971             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2972                         sinfo->rx_bytes))
2973                 goto nla_put_failure;
2974         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2975             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2976                         sinfo->tx_bytes))
2977                 goto nla_put_failure;
2978         if ((sinfo->filled & STATION_INFO_LLID) &&
2979             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2980                 goto nla_put_failure;
2981         if ((sinfo->filled & STATION_INFO_PLID) &&
2982             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2983                 goto nla_put_failure;
2984         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2985             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2986                        sinfo->plink_state))
2987                 goto nla_put_failure;
2988         switch (rdev->wiphy.signal_type) {
2989         case CFG80211_SIGNAL_TYPE_MBM:
2990                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2991                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2992                                sinfo->signal))
2993                         goto nla_put_failure;
2994                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2995                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2996                                sinfo->signal_avg))
2997                         goto nla_put_failure;
2998                 break;
2999         default:
3000                 break;
3001         }
3002         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3003                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3004                                           NL80211_STA_INFO_TX_BITRATE))
3005                         goto nla_put_failure;
3006         }
3007         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3008                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3009                                           NL80211_STA_INFO_RX_BITRATE))
3010                         goto nla_put_failure;
3011         }
3012         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3013             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3014                         sinfo->rx_packets))
3015                 goto nla_put_failure;
3016         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3017             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3018                         sinfo->tx_packets))
3019                 goto nla_put_failure;
3020         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3021             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3022                         sinfo->tx_retries))
3023                 goto nla_put_failure;
3024         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3025             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3026                         sinfo->tx_failed))
3027                 goto nla_put_failure;
3028         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3029             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3030                         sinfo->beacon_loss_count))
3031                 goto nla_put_failure;
3032         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3033                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3034                 if (!bss_param)
3035                         goto nla_put_failure;
3036
3037                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3038                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3039                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3040                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3041                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3042                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3043                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3044                                sinfo->bss_param.dtim_period) ||
3045                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3046                                 sinfo->bss_param.beacon_interval))
3047                         goto nla_put_failure;
3048
3049                 nla_nest_end(msg, bss_param);
3050         }
3051         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3052             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3053                     sizeof(struct nl80211_sta_flag_update),
3054                     &sinfo->sta_flags))
3055                 goto nla_put_failure;
3056         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3057                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3058                             sinfo->t_offset))
3059                 goto nla_put_failure;
3060         nla_nest_end(msg, sinfoattr);
3061
3062         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3063             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3064                     sinfo->assoc_req_ies))
3065                 goto nla_put_failure;
3066
3067         return genlmsg_end(msg, hdr);
3068
3069  nla_put_failure:
3070         genlmsg_cancel(msg, hdr);
3071         return -EMSGSIZE;
3072 }
3073
3074 static int nl80211_dump_station(struct sk_buff *skb,
3075                                 struct netlink_callback *cb)
3076 {
3077         struct station_info sinfo;
3078         struct cfg80211_registered_device *dev;
3079         struct net_device *netdev;
3080         u8 mac_addr[ETH_ALEN];
3081         int sta_idx = cb->args[1];
3082         int err;
3083
3084         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3085         if (err)
3086                 return err;
3087
3088         if (!dev->ops->dump_station) {
3089                 err = -EOPNOTSUPP;
3090                 goto out_err;
3091         }
3092
3093         while (1) {
3094                 memset(&sinfo, 0, sizeof(sinfo));
3095                 err = rdev_dump_station(dev, netdev, sta_idx,
3096                                         mac_addr, &sinfo);
3097                 if (err == -ENOENT)
3098                         break;
3099                 if (err)
3100                         goto out_err;
3101
3102                 if (nl80211_send_station(skb,
3103                                 NETLINK_CB(cb->skb).portid,
3104                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3105                                 dev, netdev, mac_addr,
3106                                 &sinfo) < 0)
3107                         goto out;
3108
3109                 sta_idx++;
3110         }
3111
3112
3113  out:
3114         cb->args[1] = sta_idx;
3115         err = skb->len;
3116  out_err:
3117         nl80211_finish_netdev_dump(dev);
3118
3119         return err;
3120 }
3121
3122 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3123 {
3124         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3125         struct net_device *dev = info->user_ptr[1];
3126         struct station_info sinfo;
3127         struct sk_buff *msg;
3128         u8 *mac_addr = NULL;
3129         int err;
3130
3131         memset(&sinfo, 0, sizeof(sinfo));
3132
3133         if (!info->attrs[NL80211_ATTR_MAC])
3134                 return -EINVAL;
3135
3136         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3137
3138         if (!rdev->ops->get_station)
3139                 return -EOPNOTSUPP;
3140
3141         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3142         if (err)
3143                 return err;
3144
3145         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3146         if (!msg)
3147                 return -ENOMEM;
3148
3149         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3150                                  rdev, dev, mac_addr, &sinfo) < 0) {
3151                 nlmsg_free(msg);
3152                 return -ENOBUFS;
3153         }
3154
3155         return genlmsg_reply(msg, info);
3156 }
3157
3158 /*
3159  * Get vlan interface making sure it is running and on the right wiphy.
3160  */
3161 static struct net_device *get_vlan(struct genl_info *info,
3162                                    struct cfg80211_registered_device *rdev)
3163 {
3164         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3165         struct net_device *v;
3166         int ret;
3167
3168         if (!vlanattr)
3169                 return NULL;
3170
3171         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3172         if (!v)
3173                 return ERR_PTR(-ENODEV);
3174
3175         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3176                 ret = -EINVAL;
3177                 goto error;
3178         }
3179
3180         if (!netif_running(v)) {
3181                 ret = -ENETDOWN;
3182                 goto error;
3183         }
3184
3185         return v;
3186  error:
3187         dev_put(v);
3188         return ERR_PTR(ret);
3189 }
3190
3191 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3192 {
3193         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3194         int err;
3195         struct net_device *dev = info->user_ptr[1];
3196         struct station_parameters params;
3197         u8 *mac_addr = NULL;
3198
3199         memset(&params, 0, sizeof(params));
3200
3201         params.listen_interval = -1;
3202         params.plink_state = -1;
3203
3204         if (info->attrs[NL80211_ATTR_STA_AID])
3205                 return -EINVAL;
3206
3207         if (!info->attrs[NL80211_ATTR_MAC])
3208                 return -EINVAL;
3209
3210         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3211
3212         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3213                 params.supported_rates =
3214                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3215                 params.supported_rates_len =
3216                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3217         }
3218
3219         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3220                 params.listen_interval =
3221                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3222
3223         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3224                 params.ht_capa =
3225                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3226
3227         if (!rdev->ops->change_station)
3228                 return -EOPNOTSUPP;
3229
3230         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3231                 return -EINVAL;
3232
3233         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3234                 params.plink_action =
3235                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3236
3237         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3238                 params.plink_state =
3239                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3240
3241         switch (dev->ieee80211_ptr->iftype) {
3242         case NL80211_IFTYPE_AP:
3243         case NL80211_IFTYPE_AP_VLAN:
3244         case NL80211_IFTYPE_P2P_GO:
3245                 /* disallow mesh-specific things */
3246                 if (params.plink_action)
3247                         return -EINVAL;
3248
3249                 /* TDLS can't be set, ... */
3250                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3251                         return -EINVAL;
3252                 /*
3253                  * ... but don't bother the driver with it. This works around
3254                  * a hostapd/wpa_supplicant issue -- it always includes the
3255                  * TLDS_PEER flag in the mask even for AP mode.
3256                  */
3257                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3258
3259                 /* accept only the listed bits */
3260                 if (params.sta_flags_mask &
3261                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3262                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3263                                   BIT(NL80211_STA_FLAG_WME) |
3264                                   BIT(NL80211_STA_FLAG_MFP)))
3265                         return -EINVAL;
3266
3267                 /* must be last in here for error handling */
3268                 params.vlan = get_vlan(info, rdev);
3269                 if (IS_ERR(params.vlan))
3270                         return PTR_ERR(params.vlan);
3271                 break;
3272         case NL80211_IFTYPE_P2P_CLIENT:
3273         case NL80211_IFTYPE_STATION:
3274                 /*
3275                  * Don't allow userspace to change the TDLS_PEER flag,
3276                  * but silently ignore attempts to change it since we
3277                  * don't have state here to verify that it doesn't try
3278                  * to change the flag.
3279                  */
3280                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3281                 /* fall through */
3282         case NL80211_IFTYPE_ADHOC:
3283                 /* disallow things sta doesn't support */
3284                 if (params.plink_action)
3285                         return -EINVAL;
3286                 if (params.ht_capa)
3287                         return -EINVAL;
3288                 if (params.listen_interval >= 0)
3289                         return -EINVAL;
3290                 /* reject any changes other than AUTHORIZED */
3291                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3292                         return -EINVAL;
3293                 break;
3294         case NL80211_IFTYPE_MESH_POINT:
3295                 /* disallow things mesh doesn't support */
3296                 if (params.vlan)
3297                         return -EINVAL;
3298                 if (params.ht_capa)
3299                         return -EINVAL;
3300                 if (params.listen_interval >= 0)
3301                         return -EINVAL;
3302                 /*
3303                  * No special handling for TDLS here -- the userspace
3304                  * mesh code doesn't have this bug.
3305                  */
3306                 if (params.sta_flags_mask &
3307                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3308                                   BIT(NL80211_STA_FLAG_MFP) |
3309                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3310                         return -EINVAL;
3311                 break;
3312         default:
3313                 return -EOPNOTSUPP;
3314         }
3315
3316         /* be aware of params.vlan when changing code here */
3317
3318         err = rdev_change_station(rdev, dev, mac_addr, &params);
3319
3320         if (params.vlan)
3321                 dev_put(params.vlan);
3322
3323         return err;
3324 }
3325
3326 static struct nla_policy
3327 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3328         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3329         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3330 };
3331
3332 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3333 {
3334         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3335         int err;
3336         struct net_device *dev = info->user_ptr[1];
3337         struct station_parameters params;
3338         u8 *mac_addr = NULL;
3339
3340         memset(&params, 0, sizeof(params));
3341
3342         if (!info->attrs[NL80211_ATTR_MAC])
3343                 return -EINVAL;
3344
3345         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3346                 return -EINVAL;
3347
3348         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3349                 return -EINVAL;
3350
3351         if (!info->attrs[NL80211_ATTR_STA_AID])
3352                 return -EINVAL;
3353
3354         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3355         params.supported_rates =
3356                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3357         params.supported_rates_len =
3358                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3359         params.listen_interval =
3360                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3361
3362         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3363         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3364                 return -EINVAL;
3365
3366         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3367                 params.ht_capa =
3368                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3369
3370         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3371                 params.vht_capa =
3372                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3373
3374         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3375                 params.plink_action =
3376                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3377
3378         if (!rdev->ops->add_station)
3379                 return -EOPNOTSUPP;
3380
3381         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3382                 return -EINVAL;
3383
3384         switch (dev->ieee80211_ptr->iftype) {
3385         case NL80211_IFTYPE_AP:
3386         case NL80211_IFTYPE_AP_VLAN:
3387         case NL80211_IFTYPE_P2P_GO:
3388                 /* parse WME attributes if sta is WME capable */
3389                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3390                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3391                     info->attrs[NL80211_ATTR_STA_WME]) {
3392                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3393                         struct nlattr *nla;
3394
3395                         nla = info->attrs[NL80211_ATTR_STA_WME];
3396                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3397                                                nl80211_sta_wme_policy);
3398                         if (err)
3399                                 return err;
3400
3401                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3402                                 params.uapsd_queues =
3403                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3404                         if (params.uapsd_queues &
3405                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3406                                 return -EINVAL;
3407
3408                         if (tb[NL80211_STA_WME_MAX_SP])
3409                                 params.max_sp =
3410                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3411
3412                         if (params.max_sp &
3413                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3414                                 return -EINVAL;
3415
3416                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3417                 }
3418                 /* TDLS peers cannot be added */
3419                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3420                         return -EINVAL;
3421                 /* but don't bother the driver with it */
3422                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3423
3424                 /* must be last in here for error handling */
3425                 params.vlan = get_vlan(info, rdev);
3426                 if (IS_ERR(params.vlan))
3427                         return PTR_ERR(params.vlan);
3428                 break;
3429         case NL80211_IFTYPE_MESH_POINT:
3430                 /* TDLS peers cannot be added */
3431                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3432                         return -EINVAL;
3433                 break;
3434         case NL80211_IFTYPE_STATION:
3435                 /* Only TDLS peers can be added */
3436                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3437                         return -EINVAL;
3438                 /* Can only add if TDLS ... */
3439                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3440                         return -EOPNOTSUPP;
3441                 /* ... with external setup is supported */
3442                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3443                         return -EOPNOTSUPP;
3444                 break;
3445         default:
3446                 return -EOPNOTSUPP;
3447         }
3448
3449         /* be aware of params.vlan when changing code here */
3450
3451         err = rdev_add_station(rdev, dev, mac_addr, &params);
3452
3453         if (params.vlan)
3454                 dev_put(params.vlan);
3455         return err;
3456 }
3457
3458 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3459 {
3460         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3461         struct net_device *dev = info->user_ptr[1];
3462         u8 *mac_addr = NULL;
3463
3464         if (info->attrs[NL80211_ATTR_MAC])
3465                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3466
3467         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3468             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3469             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3470             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3471                 return -EINVAL;
3472
3473         if (!rdev->ops->del_station)
3474                 return -EOPNOTSUPP;
3475
3476         return rdev_del_station(rdev, dev, mac_addr);
3477 }
3478
3479 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3480                                 int flags, struct net_device *dev,
3481                                 u8 *dst, u8 *next_hop,
3482                                 struct mpath_info *pinfo)
3483 {
3484         void *hdr;
3485         struct nlattr *pinfoattr;
3486
3487         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3488         if (!hdr)
3489                 return -1;
3490
3491         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3492             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3493             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3494             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3495                 goto nla_put_failure;
3496
3497         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3498         if (!pinfoattr)
3499                 goto nla_put_failure;
3500         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3501             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3502                         pinfo->frame_qlen))
3503                 goto nla_put_failure;
3504         if (((pinfo->filled & MPATH_INFO_SN) &&
3505              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3506             ((pinfo->filled & MPATH_INFO_METRIC) &&
3507              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3508                          pinfo->metric)) ||
3509             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3510              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3511                          pinfo->exptime)) ||
3512             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3513              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3514                         pinfo->flags)) ||
3515             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3516              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3517                          pinfo->discovery_timeout)) ||
3518             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3519              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3520                         pinfo->discovery_retries)))
3521                 goto nla_put_failure;
3522
3523         nla_nest_end(msg, pinfoattr);
3524
3525         return genlmsg_end(msg, hdr);
3526
3527  nla_put_failure:
3528         genlmsg_cancel(msg, hdr);
3529         return -EMSGSIZE;
3530 }
3531
3532 static int nl80211_dump_mpath(struct sk_buff *skb,
3533                               struct netlink_callback *cb)
3534 {
3535         struct mpath_info pinfo;
3536         struct cfg80211_registered_device *dev;
3537         struct net_device *netdev;
3538         u8 dst[ETH_ALEN];
3539         u8 next_hop[ETH_ALEN];
3540         int path_idx = cb->args[1];
3541         int err;
3542
3543         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3544         if (err)
3545                 return err;
3546
3547         if (!dev->ops->dump_mpath) {
3548                 err = -EOPNOTSUPP;
3549                 goto out_err;
3550         }
3551
3552         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3553                 err = -EOPNOTSUPP;
3554                 goto out_err;
3555         }
3556
3557         while (1) {
3558                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3559                                       &pinfo);
3560                 if (err == -ENOENT)
3561                         break;
3562                 if (err)
3563                         goto out_err;
3564
3565                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3566                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3567                                        netdev, dst, next_hop,
3568                                        &pinfo) < 0)
3569                         goto out;
3570
3571                 path_idx++;
3572         }
3573
3574
3575  out:
3576         cb->args[1] = path_idx;
3577         err = skb->len;
3578  out_err:
3579         nl80211_finish_netdev_dump(dev);
3580         return err;
3581 }
3582
3583 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3584 {
3585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3586         int err;
3587         struct net_device *dev = info->user_ptr[1];
3588         struct mpath_info pinfo;
3589         struct sk_buff *msg;
3590         u8 *dst = NULL;
3591         u8 next_hop[ETH_ALEN];
3592
3593         memset(&pinfo, 0, sizeof(pinfo));
3594
3595         if (!info->attrs[NL80211_ATTR_MAC])
3596                 return -EINVAL;
3597
3598         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3599
3600         if (!rdev->ops->get_mpath)
3601                 return -EOPNOTSUPP;
3602
3603         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3604                 return -EOPNOTSUPP;
3605
3606         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3607         if (err)
3608                 return err;
3609
3610         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3611         if (!msg)
3612                 return -ENOMEM;
3613
3614         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3615                                  dev, dst, next_hop, &pinfo) < 0) {
3616                 nlmsg_free(msg);
3617                 return -ENOBUFS;
3618         }
3619
3620         return genlmsg_reply(msg, info);
3621 }
3622
3623 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3624 {
3625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3626         struct net_device *dev = info->user_ptr[1];
3627         u8 *dst = NULL;
3628         u8 *next_hop = NULL;
3629
3630         if (!info->attrs[NL80211_ATTR_MAC])
3631                 return -EINVAL;
3632
3633         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3634                 return -EINVAL;
3635
3636         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3637         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3638
3639         if (!rdev->ops->change_mpath)
3640                 return -EOPNOTSUPP;
3641
3642         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3643                 return -EOPNOTSUPP;
3644
3645         return rdev_change_mpath(rdev, dev, dst, next_hop);
3646 }
3647
3648 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3649 {
3650         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3651         struct net_device *dev = info->user_ptr[1];
3652         u8 *dst = NULL;
3653         u8 *next_hop = NULL;
3654
3655         if (!info->attrs[NL80211_ATTR_MAC])
3656                 return -EINVAL;
3657
3658         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3659                 return -EINVAL;
3660
3661         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3662         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3663
3664         if (!rdev->ops->add_mpath)
3665                 return -EOPNOTSUPP;
3666
3667         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3668                 return -EOPNOTSUPP;
3669
3670         return rdev_add_mpath(rdev, dev, dst, next_hop);
3671 }
3672
3673 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3674 {
3675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3676         struct net_device *dev = info->user_ptr[1];
3677         u8 *dst = NULL;
3678
3679         if (info->attrs[NL80211_ATTR_MAC])
3680                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3681
3682         if (!rdev->ops->del_mpath)
3683                 return -EOPNOTSUPP;
3684
3685         return rdev_del_mpath(rdev, dev, dst);
3686 }
3687
3688 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3689 {
3690         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3691         struct net_device *dev = info->user_ptr[1];
3692         struct bss_parameters params;
3693
3694         memset(&params, 0, sizeof(params));
3695         /* default to not changing parameters */
3696         params.use_cts_prot = -1;
3697         params.use_short_preamble = -1;
3698         params.use_short_slot_time = -1;
3699         params.ap_isolate = -1;
3700         params.ht_opmode = -1;
3701
3702         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3703                 params.use_cts_prot =
3704                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3705         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3706                 params.use_short_preamble =
3707                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3708         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3709                 params.use_short_slot_time =
3710                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3711         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3712                 params.basic_rates =
3713                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3714                 params.basic_rates_len =
3715                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3716         }
3717         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3718                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3719         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3720                 params.ht_opmode =
3721                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3722
3723         if (!rdev->ops->change_bss)
3724                 return -EOPNOTSUPP;
3725
3726         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3727             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3728                 return -EOPNOTSUPP;
3729
3730         return rdev_change_bss(rdev, dev, &params);
3731 }
3732
3733 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3734         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3735         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3736         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3737         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3738         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3739         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3740 };
3741
3742 static int parse_reg_rule(struct nlattr *tb[],
3743         struct ieee80211_reg_rule *reg_rule)
3744 {
3745         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3746         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3747
3748         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3749                 return -EINVAL;
3750         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3751                 return -EINVAL;
3752         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3753                 return -EINVAL;
3754         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3755                 return -EINVAL;
3756         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3757                 return -EINVAL;
3758
3759         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3760
3761         freq_range->start_freq_khz =
3762                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3763         freq_range->end_freq_khz =
3764                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3765         freq_range->max_bandwidth_khz =
3766                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3767
3768         power_rule->max_eirp =
3769                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3770
3771         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3772                 power_rule->max_antenna_gain =
3773                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3774
3775         return 0;
3776 }
3777
3778 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3779 {
3780         int r;
3781         char *data = NULL;
3782         enum nl80211_user_reg_hint_type user_reg_hint_type;
3783
3784         /*
3785          * You should only get this when cfg80211 hasn't yet initialized
3786          * completely when built-in to the kernel right between the time
3787          * window between nl80211_init() and regulatory_init(), if that is
3788          * even possible.
3789          */
3790         mutex_lock(&cfg80211_mutex);
3791         if (unlikely(!cfg80211_regdomain)) {
3792                 mutex_unlock(&cfg80211_mutex);
3793                 return -EINPROGRESS;
3794         }
3795         mutex_unlock(&cfg80211_mutex);
3796
3797         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3798                 return -EINVAL;
3799
3800         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3801
3802         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
3803                 user_reg_hint_type =
3804                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
3805         else
3806                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
3807
3808         switch (user_reg_hint_type) {
3809         case NL80211_USER_REG_HINT_USER:
3810         case NL80211_USER_REG_HINT_CELL_BASE:
3811                 break;
3812         default:
3813                 return -EINVAL;
3814         }
3815
3816         r = regulatory_hint_user(data, user_reg_hint_type);
3817
3818         return r;
3819 }
3820
3821 static int nl80211_get_mesh_config(struct sk_buff *skb,
3822                                    struct genl_info *info)
3823 {
3824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3825         struct net_device *dev = info->user_ptr[1];
3826         struct wireless_dev *wdev = dev->ieee80211_ptr;
3827         struct mesh_config cur_params;
3828         int err = 0;
3829         void *hdr;
3830         struct nlattr *pinfoattr;
3831         struct sk_buff *msg;
3832
3833         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3834                 return -EOPNOTSUPP;
3835
3836         if (!rdev->ops->get_mesh_config)
3837                 return -EOPNOTSUPP;
3838
3839         wdev_lock(wdev);
3840         /* If not connected, get default parameters */
3841         if (!wdev->mesh_id_len)
3842                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3843         else
3844                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
3845         wdev_unlock(wdev);
3846
3847         if (err)
3848                 return err;
3849
3850         /* Draw up a netlink message to send back */
3851         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3852         if (!msg)
3853                 return -ENOMEM;
3854         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3855                              NL80211_CMD_GET_MESH_CONFIG);
3856         if (!hdr)
3857                 goto out;
3858         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3859         if (!pinfoattr)
3860                 goto nla_put_failure;
3861         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3862             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3863                         cur_params.dot11MeshRetryTimeout) ||
3864             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3865                         cur_params.dot11MeshConfirmTimeout) ||
3866             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3867                         cur_params.dot11MeshHoldingTimeout) ||
3868             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3869                         cur_params.dot11MeshMaxPeerLinks) ||
3870             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3871                        cur_params.dot11MeshMaxRetries) ||
3872             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3873                        cur_params.dot11MeshTTL) ||
3874             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3875                        cur_params.element_ttl) ||
3876             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3877                        cur_params.auto_open_plinks) ||
3878             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3879                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3880             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3881                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3882             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3883                         cur_params.path_refresh_time) ||
3884             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3885                         cur_params.min_discovery_timeout) ||
3886             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3887                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3888             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3889                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3890             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3891                         cur_params.dot11MeshHWMPperrMinInterval) ||
3892             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3893                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3894             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3895                        cur_params.dot11MeshHWMPRootMode) ||
3896             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3897                         cur_params.dot11MeshHWMPRannInterval) ||
3898             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3899                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3900             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3901                        cur_params.dot11MeshForwarding) ||
3902             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3903                         cur_params.rssi_threshold) ||
3904             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3905                         cur_params.ht_opmode) ||
3906             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3907                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3908             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3909                         cur_params.dot11MeshHWMProotInterval) ||
3910             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3911                         cur_params.dot11MeshHWMPconfirmationInterval))
3912                 goto nla_put_failure;
3913         nla_nest_end(msg, pinfoattr);
3914         genlmsg_end(msg, hdr);
3915         return genlmsg_reply(msg, info);
3916
3917  nla_put_failure:
3918         genlmsg_cancel(msg, hdr);
3919  out:
3920         nlmsg_free(msg);
3921         return -ENOBUFS;
3922 }
3923
3924 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3925         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3926         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3927         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3928         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3929         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3930         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3931         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3932         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3933         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3934         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3935         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3936         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3937         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3938         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3939         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3940         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3941         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3942         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3943         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3944         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3945         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3946         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3947         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3948         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3949         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3950 };
3951
3952 static const struct nla_policy
3953         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3954         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3955         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3956         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3957         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3958         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3959                                     .len = IEEE80211_MAX_DATA_LEN },
3960         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3961 };
3962
3963 static int nl80211_parse_mesh_config(struct genl_info *info,
3964                                      struct mesh_config *cfg,
3965                                      u32 *mask_out)
3966 {
3967         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3968         u32 mask = 0;
3969
3970 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3971 do {\
3972         if (table[attr_num]) {\
3973                 cfg->param = nla_fn(table[attr_num]); \
3974                 mask |= (1 << (attr_num - 1)); \
3975         } \
3976 } while (0);\
3977
3978
3979         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3980                 return -EINVAL;
3981         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3982                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3983                              nl80211_meshconf_params_policy))
3984                 return -EINVAL;
3985
3986         /* This makes sure that there aren't more than 32 mesh config
3987          * parameters (otherwise our bitfield scheme would not work.) */
3988         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3989
3990         /* Fill in the params struct */
3991         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3992                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3993                                   nla_get_u16);
3994         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3995                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3996                                   nla_get_u16);
3997         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3998                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3999                                   nla_get_u16);
4000         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
4001                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4002                                   nla_get_u16);
4003         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
4004                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4005                                   nla_get_u8);
4006         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
4007                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4008         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
4009                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4010                                   nla_get_u8);
4011         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
4012                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4013                                   nla_get_u8);
4014         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
4015                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4016                                   nla_get_u32);
4017         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
4018                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4019                                   nla_get_u8);
4020         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
4021                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4022                                   nla_get_u32);
4023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
4024                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4025                                   nla_get_u16);
4026         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
4027                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4028                                   nla_get_u32);
4029         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4030                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4031                                   nla_get_u16);
4032         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4033                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4034                                   nla_get_u16);
4035         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4036                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
4037                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4038                                   nla_get_u16);
4039         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
4040                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
4041         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
4042                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4043                                   nla_get_u16);
4044         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4045                                   dot11MeshGateAnnouncementProtocol, mask,
4046                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4047                                   nla_get_u8);
4048         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
4049                                   mask, NL80211_MESHCONF_FORWARDING,
4050                                   nla_get_u8);
4051         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
4052                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4053                                   nla_get_u32);
4054         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
4055                                   mask, NL80211_MESHCONF_HT_OPMODE,
4056                                   nla_get_u16);
4057         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4058                                   mask,
4059                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4060                                   nla_get_u32);
4061         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
4062                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4063                                   nla_get_u16);
4064         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4065                                   dot11MeshHWMPconfirmationInterval, mask,
4066                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4067                                   nla_get_u16);
4068         if (mask_out)
4069                 *mask_out = mask;
4070
4071         return 0;
4072
4073 #undef FILL_IN_MESH_PARAM_IF_SET
4074 }
4075
4076 static int nl80211_parse_mesh_setup(struct genl_info *info,
4077                                      struct mesh_setup *setup)
4078 {
4079         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4080
4081         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4082                 return -EINVAL;
4083         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4084                              info->attrs[NL80211_ATTR_MESH_SETUP],
4085                              nl80211_mesh_setup_params_policy))
4086                 return -EINVAL;
4087
4088         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4089                 setup->sync_method =
4090                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4091                  IEEE80211_SYNC_METHOD_VENDOR :
4092                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4093
4094         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4095                 setup->path_sel_proto =
4096                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4097                  IEEE80211_PATH_PROTOCOL_VENDOR :
4098                  IEEE80211_PATH_PROTOCOL_HWMP;
4099
4100         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4101                 setup->path_metric =
4102                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4103                  IEEE80211_PATH_METRIC_VENDOR :
4104                  IEEE80211_PATH_METRIC_AIRTIME;
4105
4106
4107         if (tb[NL80211_MESH_SETUP_IE]) {
4108                 struct nlattr *ieattr =
4109                         tb[NL80211_MESH_SETUP_IE];
4110                 if (!is_valid_ie_attr(ieattr))
4111                         return -EINVAL;
4112                 setup->ie = nla_data(ieattr);
4113                 setup->ie_len = nla_len(ieattr);
4114         }
4115         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4116         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4117
4118         return 0;
4119 }
4120
4121 static int nl80211_update_mesh_config(struct sk_buff *skb,
4122                                       struct genl_info *info)
4123 {
4124         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4125         struct net_device *dev = info->user_ptr[1];
4126         struct wireless_dev *wdev = dev->ieee80211_ptr;
4127         struct mesh_config cfg;
4128         u32 mask;
4129         int err;
4130
4131         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4132                 return -EOPNOTSUPP;
4133
4134         if (!rdev->ops->update_mesh_config)
4135                 return -EOPNOTSUPP;
4136
4137         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4138         if (err)
4139                 return err;
4140
4141         wdev_lock(wdev);
4142         if (!wdev->mesh_id_len)
4143                 err = -ENOLINK;
4144
4145         if (!err)
4146                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4147
4148         wdev_unlock(wdev);
4149
4150         return err;
4151 }
4152
4153 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4154 {
4155         struct sk_buff *msg;
4156         void *hdr = NULL;
4157         struct nlattr *nl_reg_rules;
4158         unsigned int i;
4159         int err = -EINVAL;
4160
4161         mutex_lock(&cfg80211_mutex);
4162
4163         if (!cfg80211_regdomain)
4164                 goto out;
4165
4166         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4167         if (!msg) {
4168                 err = -ENOBUFS;
4169                 goto out;
4170         }
4171
4172         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4173                              NL80211_CMD_GET_REG);
4174         if (!hdr)
4175                 goto put_failure;
4176
4177         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
4178                            cfg80211_regdomain->alpha2) ||
4179             (cfg80211_regdomain->dfs_region &&
4180              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
4181                         cfg80211_regdomain->dfs_region)))
4182                 goto nla_put_failure;
4183
4184         if (reg_last_request_cell_base() &&
4185             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4186                         NL80211_USER_REG_HINT_CELL_BASE))
4187                 goto nla_put_failure;
4188
4189         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4190         if (!nl_reg_rules)
4191                 goto nla_put_failure;
4192
4193         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
4194                 struct nlattr *nl_reg_rule;
4195                 const struct ieee80211_reg_rule *reg_rule;
4196                 const struct ieee80211_freq_range *freq_range;
4197                 const struct ieee80211_power_rule *power_rule;
4198
4199                 reg_rule = &cfg80211_regdomain->reg_rules[i];
4200                 freq_range = &reg_rule->freq_range;
4201                 power_rule = &reg_rule->power_rule;
4202
4203                 nl_reg_rule = nla_nest_start(msg, i);
4204                 if (!nl_reg_rule)
4205                         goto nla_put_failure;
4206
4207                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4208                                 reg_rule->flags) ||
4209                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4210                                 freq_range->start_freq_khz) ||
4211                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4212                                 freq_range->end_freq_khz) ||
4213                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4214                                 freq_range->max_bandwidth_khz) ||
4215                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4216                                 power_rule->max_antenna_gain) ||
4217                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4218                                 power_rule->max_eirp))
4219                         goto nla_put_failure;
4220
4221                 nla_nest_end(msg, nl_reg_rule);
4222         }
4223
4224         nla_nest_end(msg, nl_reg_rules);
4225
4226         genlmsg_end(msg, hdr);
4227         err = genlmsg_reply(msg, info);
4228         goto out;
4229
4230 nla_put_failure:
4231         genlmsg_cancel(msg, hdr);
4232 put_failure:
4233         nlmsg_free(msg);
4234         err = -EMSGSIZE;
4235 out:
4236         mutex_unlock(&cfg80211_mutex);
4237         return err;
4238 }
4239
4240 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4241 {
4242         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4243         struct nlattr *nl_reg_rule;
4244         char *alpha2 = NULL;
4245         int rem_reg_rules = 0, r = 0;
4246         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4247         u8 dfs_region = 0;
4248         struct ieee80211_regdomain *rd = NULL;
4249
4250         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4251                 return -EINVAL;
4252
4253         if (!info->attrs[NL80211_ATTR_REG_RULES])
4254                 return -EINVAL;
4255
4256         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4257
4258         if (info->attrs[NL80211_ATTR_DFS_REGION])
4259                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4260
4261         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4262                         rem_reg_rules) {
4263                 num_rules++;
4264                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4265                         return -EINVAL;
4266         }
4267
4268         mutex_lock(&cfg80211_mutex);
4269
4270         if (!reg_is_valid_request(alpha2)) {
4271                 r = -EINVAL;
4272                 goto bad_reg;
4273         }
4274
4275         size_of_regd = sizeof(struct ieee80211_regdomain) +
4276                 (num_rules * sizeof(struct ieee80211_reg_rule));
4277
4278         rd = kzalloc(size_of_regd, GFP_KERNEL);
4279         if (!rd) {
4280                 r = -ENOMEM;
4281                 goto bad_reg;
4282         }
4283
4284         rd->n_reg_rules = num_rules;
4285         rd->alpha2[0] = alpha2[0];
4286         rd->alpha2[1] = alpha2[1];
4287
4288         /*
4289          * Disable DFS master mode if the DFS region was
4290          * not supported or known on this kernel.
4291          */
4292         if (reg_supported_dfs_region(dfs_region))
4293                 rd->dfs_region = dfs_region;
4294
4295         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4296                         rem_reg_rules) {
4297                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4298                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4299                         reg_rule_policy);
4300                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4301                 if (r)
4302                         goto bad_reg;
4303
4304                 rule_idx++;
4305
4306                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4307                         r = -EINVAL;
4308                         goto bad_reg;
4309                 }
4310         }
4311
4312         BUG_ON(rule_idx != num_rules);
4313
4314         r = set_regdom(rd);
4315
4316         mutex_unlock(&cfg80211_mutex);
4317
4318         return r;
4319
4320  bad_reg:
4321         mutex_unlock(&cfg80211_mutex);
4322         kfree(rd);
4323         return r;
4324 }
4325
4326 static int validate_scan_freqs(struct nlattr *freqs)
4327 {
4328         struct nlattr *attr1, *attr2;
4329         int n_channels = 0, tmp1, tmp2;
4330
4331         nla_for_each_nested(attr1, freqs, tmp1) {
4332                 n_channels++;
4333                 /*
4334                  * Some hardware has a limited channel list for
4335                  * scanning, and it is pretty much nonsensical
4336                  * to scan for a channel twice, so disallow that
4337                  * and don't require drivers to check that the
4338                  * channel list they get isn't longer than what
4339                  * they can scan, as long as they can scan all
4340                  * the channels they registered at once.
4341                  */
4342                 nla_for_each_nested(attr2, freqs, tmp2)
4343                         if (attr1 != attr2 &&
4344                             nla_get_u32(attr1) == nla_get_u32(attr2))
4345                                 return 0;
4346         }
4347
4348         return n_channels;
4349 }
4350
4351 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4352 {
4353         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4354         struct wireless_dev *wdev = info->user_ptr[1];
4355         struct cfg80211_scan_request *request;
4356         struct nlattr *attr;
4357         struct wiphy *wiphy;
4358         int err, tmp, n_ssids = 0, n_channels, i;
4359         size_t ie_len;
4360
4361         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4362                 return -EINVAL;
4363
4364         wiphy = &rdev->wiphy;
4365
4366         if (!rdev->ops->scan)
4367                 return -EOPNOTSUPP;
4368
4369         if (rdev->scan_req)
4370                 return -EBUSY;
4371
4372         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4373                 n_channels = validate_scan_freqs(
4374                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4375                 if (!n_channels)
4376                         return -EINVAL;
4377         } else {
4378                 enum ieee80211_band band;
4379                 n_channels = 0;
4380
4381                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4382                         if (wiphy->bands[band])
4383                                 n_channels += wiphy->bands[band]->n_channels;
4384         }
4385
4386         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4387                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4388                         n_ssids++;
4389
4390         if (n_ssids > wiphy->max_scan_ssids)
4391                 return -EINVAL;
4392
4393         if (info->attrs[NL80211_ATTR_IE])
4394                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4395         else
4396                 ie_len = 0;
4397
4398         if (ie_len > wiphy->max_scan_ie_len)
4399                 return -EINVAL;
4400
4401         request = kzalloc(sizeof(*request)
4402                         + sizeof(*request->ssids) * n_ssids
4403                         + sizeof(*request->channels) * n_channels
4404                         + ie_len, GFP_KERNEL);
4405         if (!request)
4406                 return -ENOMEM;
4407
4408         if (n_ssids)
4409                 request->ssids = (void *)&request->channels[n_channels];
4410         request->n_ssids = n_ssids;
4411         if (ie_len) {
4412                 if (request->ssids)
4413                         request->ie = (void *)(request->ssids + n_ssids);
4414                 else
4415                         request->ie = (void *)(request->channels + n_channels);
4416         }
4417
4418         i = 0;
4419         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4420                 /* user specified, bail out if channel not found */
4421                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4422                         struct ieee80211_channel *chan;
4423
4424                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4425
4426                         if (!chan) {
4427                                 err = -EINVAL;
4428                                 goto out_free;
4429                         }
4430
4431                         /* ignore disabled channels */
4432                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4433                                 continue;
4434
4435                         request->channels[i] = chan;
4436                         i++;
4437                 }
4438         } else {
4439                 enum ieee80211_band band;
4440
4441                 /* all channels */
4442                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4443                         int j;
4444                         if (!wiphy->bands[band])
4445                                 continue;
4446                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4447                                 struct ieee80211_channel *chan;
4448
4449                                 chan = &wiphy->bands[band]->channels[j];
4450
4451                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4452                                         continue;
4453
4454                                 request->channels[i] = chan;
4455                                 i++;
4456                         }
4457                 }
4458         }
4459
4460         if (!i) {
4461                 err = -EINVAL;
4462                 goto out_free;
4463         }
4464
4465         request->n_channels = i;
4466
4467         i = 0;
4468         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4469                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4470                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4471                                 err = -EINVAL;
4472                                 goto out_free;
4473                         }
4474                         request->ssids[i].ssid_len = nla_len(attr);
4475                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4476                         i++;
4477                 }
4478         }
4479
4480         if (info->attrs[NL80211_ATTR_IE]) {
4481                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4482                 memcpy((void *)request->ie,
4483                        nla_data(info->attrs[NL80211_ATTR_IE]),
4484                        request->ie_len);
4485         }
4486
4487         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4488                 if (wiphy->bands[i])
4489                         request->rates[i] =
4490                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4491
4492         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4493                 nla_for_each_nested(attr,
4494                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4495                                     tmp) {
4496                         enum ieee80211_band band = nla_type(attr);
4497
4498                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4499                                 err = -EINVAL;
4500                                 goto out_free;
4501                         }
4502                         err = ieee80211_get_ratemask(wiphy->bands[band],
4503                                                      nla_data(attr),
4504                                                      nla_len(attr),
4505                                                      &request->rates[band]);
4506                         if (err)
4507                                 goto out_free;
4508                 }
4509         }
4510
4511         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4512                 request->flags = nla_get_u32(
4513                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4514                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4515                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4516                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4517                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4518                         err = -EOPNOTSUPP;
4519                         goto out_free;
4520                 }
4521         }
4522
4523         request->no_cck =
4524                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4525
4526         request->wdev = wdev;
4527         request->wiphy = &rdev->wiphy;
4528         request->scan_start = jiffies;
4529
4530         rdev->scan_req = request;
4531         err = rdev_scan(rdev, request);
4532
4533         if (!err) {
4534                 nl80211_send_scan_start(rdev, wdev);
4535                 if (wdev->netdev)
4536                         dev_hold(wdev->netdev);
4537         } else {
4538  out_free:
4539                 rdev->scan_req = NULL;
4540                 kfree(request);
4541         }
4542
4543         return err;
4544 }
4545
4546 static int nl80211_start_sched_scan(struct sk_buff *skb,
4547                                     struct genl_info *info)
4548 {
4549         struct cfg80211_sched_scan_request *request;
4550         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4551         struct net_device *dev = info->user_ptr[1];
4552         struct nlattr *attr;
4553         struct wiphy *wiphy;
4554         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4555         u32 interval;
4556         enum ieee80211_band band;
4557         size_t ie_len;
4558         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4559
4560         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4561             !rdev->ops->sched_scan_start)
4562                 return -EOPNOTSUPP;
4563
4564         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4565                 return -EINVAL;
4566
4567         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4568                 return -EINVAL;
4569
4570         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4571         if (interval == 0)
4572                 return -EINVAL;
4573
4574         wiphy = &rdev->wiphy;
4575
4576         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4577                 n_channels = validate_scan_freqs(
4578                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4579                 if (!n_channels)
4580                         return -EINVAL;
4581         } else {
4582                 n_channels = 0;
4583
4584                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4585                         if (wiphy->bands[band])
4586                                 n_channels += wiphy->bands[band]->n_channels;
4587         }
4588
4589         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4590                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4591                                     tmp)
4592                         n_ssids++;
4593
4594         if (n_ssids > wiphy->max_sched_scan_ssids)
4595                 return -EINVAL;
4596
4597         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4598                 nla_for_each_nested(attr,
4599                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4600                                     tmp)
4601                         n_match_sets++;
4602
4603         if (n_match_sets > wiphy->max_match_sets)
4604                 return -EINVAL;
4605
4606         if (info->attrs[NL80211_ATTR_IE])
4607                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4608         else
4609                 ie_len = 0;
4610
4611         if (ie_len > wiphy->max_sched_scan_ie_len)
4612                 return -EINVAL;
4613
4614         mutex_lock(&rdev->sched_scan_mtx);
4615
4616         if (rdev->sched_scan_req) {
4617                 err = -EINPROGRESS;
4618                 goto out;
4619         }
4620
4621         request = kzalloc(sizeof(*request)
4622                         + sizeof(*request->ssids) * n_ssids
4623                         + sizeof(*request->match_sets) * n_match_sets
4624                         + sizeof(*request->channels) * n_channels
4625                         + ie_len, GFP_KERNEL);
4626         if (!request) {
4627                 err = -ENOMEM;
4628                 goto out;
4629         }
4630
4631         if (n_ssids)
4632                 request->ssids = (void *)&request->channels[n_channels];
4633         request->n_ssids = n_ssids;
4634         if (ie_len) {
4635                 if (request->ssids)
4636                         request->ie = (void *)(request->ssids + n_ssids);
4637                 else
4638                         request->ie = (void *)(request->channels + n_channels);
4639         }
4640
4641         if (n_match_sets) {
4642                 if (request->ie)
4643                         request->match_sets = (void *)(request->ie + ie_len);
4644                 else if (request->ssids)
4645                         request->match_sets =
4646                                 (void *)(request->ssids + n_ssids);
4647                 else
4648                         request->match_sets =
4649                                 (void *)(request->channels + n_channels);
4650         }
4651         request->n_match_sets = n_match_sets;
4652
4653         i = 0;
4654         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4655                 /* user specified, bail out if channel not found */
4656                 nla_for_each_nested(attr,
4657                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4658                                     tmp) {
4659                         struct ieee80211_channel *chan;
4660
4661                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4662
4663                         if (!chan) {
4664                                 err = -EINVAL;
4665                                 goto out_free;
4666                         }
4667
4668                         /* ignore disabled channels */
4669                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4670                                 continue;
4671
4672                         request->channels[i] = chan;
4673                         i++;
4674                 }
4675         } else {
4676                 /* all channels */
4677                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4678                         int j;
4679                         if (!wiphy->bands[band])
4680                                 continue;
4681                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4682                                 struct ieee80211_channel *chan;
4683
4684                                 chan = &wiphy->bands[band]->channels[j];
4685
4686                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4687                                         continue;
4688
4689                                 request->channels[i] = chan;
4690                                 i++;
4691                         }
4692                 }
4693         }
4694
4695         if (!i) {
4696                 err = -EINVAL;
4697                 goto out_free;
4698         }
4699
4700         request->n_channels = i;
4701
4702         i = 0;
4703         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4704                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4705                                     tmp) {
4706                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4707                                 err = -EINVAL;
4708                                 goto out_free;
4709                         }
4710                         request->ssids[i].ssid_len = nla_len(attr);
4711                         memcpy(request->ssids[i].ssid, nla_data(attr),
4712                                nla_len(attr));
4713                         i++;
4714                 }
4715         }
4716
4717         i = 0;
4718         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4719                 nla_for_each_nested(attr,
4720                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4721                                     tmp) {
4722                         struct nlattr *ssid, *rssi;
4723
4724                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4725                                   nla_data(attr), nla_len(attr),
4726                                   nl80211_match_policy);
4727                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4728                         if (ssid) {
4729                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4730                                         err = -EINVAL;
4731                                         goto out_free;
4732                                 }
4733                                 memcpy(request->match_sets[i].ssid.ssid,
4734                                        nla_data(ssid), nla_len(ssid));
4735                                 request->match_sets[i].ssid.ssid_len =
4736                                         nla_len(ssid);
4737                         }
4738                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4739                         if (rssi)
4740                                 request->rssi_thold = nla_get_u32(rssi);
4741                         else
4742                                 request->rssi_thold =
4743                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4744                         i++;
4745                 }
4746         }
4747
4748         if (info->attrs[NL80211_ATTR_IE]) {
4749                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4750                 memcpy((void *)request->ie,
4751                        nla_data(info->attrs[NL80211_ATTR_IE]),
4752                        request->ie_len);
4753         }
4754
4755         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4756                 request->flags = nla_get_u32(
4757                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4758                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4759                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4760                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4761                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4762                         err = -EOPNOTSUPP;
4763                         goto out_free;
4764                 }
4765         }
4766
4767         request->dev = dev;
4768         request->wiphy = &rdev->wiphy;
4769         request->interval = interval;
4770         request->scan_start = jiffies;
4771
4772         err = rdev_sched_scan_start(rdev, dev, request);
4773         if (!err) {
4774                 rdev->sched_scan_req = request;
4775                 nl80211_send_sched_scan(rdev, dev,
4776                                         NL80211_CMD_START_SCHED_SCAN);
4777                 goto out;
4778         }
4779
4780 out_free:
4781         kfree(request);
4782 out:
4783         mutex_unlock(&rdev->sched_scan_mtx);
4784         return err;
4785 }
4786
4787 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4788                                    struct genl_info *info)
4789 {
4790         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4791         int err;
4792
4793         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4794             !rdev->ops->sched_scan_stop)
4795                 return -EOPNOTSUPP;
4796
4797         mutex_lock(&rdev->sched_scan_mtx);
4798         err = __cfg80211_stop_sched_scan(rdev, false);
4799         mutex_unlock(&rdev->sched_scan_mtx);
4800
4801         return err;
4802 }
4803
4804 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4805                             u32 seq, int flags,
4806                             struct cfg80211_registered_device *rdev,
4807                             struct wireless_dev *wdev,
4808                             struct cfg80211_internal_bss *intbss)
4809 {
4810         struct cfg80211_bss *res = &intbss->pub;
4811         void *hdr;
4812         struct nlattr *bss;
4813
4814         ASSERT_WDEV_LOCK(wdev);
4815
4816         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
4817                              NL80211_CMD_NEW_SCAN_RESULTS);
4818         if (!hdr)
4819                 return -1;
4820
4821         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4822
4823         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4824             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4825                 goto nla_put_failure;
4826
4827         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4828         if (!bss)
4829                 goto nla_put_failure;
4830         if ((!is_zero_ether_addr(res->bssid) &&
4831              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4832             (res->information_elements && res->len_information_elements &&
4833              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4834                      res->len_information_elements,
4835                      res->information_elements)) ||
4836             (res->beacon_ies && res->len_beacon_ies &&
4837              res->beacon_ies != res->information_elements &&
4838              nla_put(msg, NL80211_BSS_BEACON_IES,
4839                      res->len_beacon_ies, res->beacon_ies)))
4840                 goto nla_put_failure;
4841         if (res->tsf &&
4842             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4843                 goto nla_put_failure;
4844         if (res->beacon_interval &&
4845             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4846                 goto nla_put_failure;
4847         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4848             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4849             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4850                         jiffies_to_msecs(jiffies - intbss->ts)))
4851                 goto nla_put_failure;
4852
4853         switch (rdev->wiphy.signal_type) {
4854         case CFG80211_SIGNAL_TYPE_MBM:
4855                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4856                         goto nla_put_failure;
4857                 break;
4858         case CFG80211_SIGNAL_TYPE_UNSPEC:
4859                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4860                         goto nla_put_failure;
4861                 break;
4862         default:
4863                 break;
4864         }
4865
4866         switch (wdev->iftype) {
4867         case NL80211_IFTYPE_P2P_CLIENT:
4868         case NL80211_IFTYPE_STATION:
4869                 if (intbss == wdev->current_bss &&
4870                     nla_put_u32(msg, NL80211_BSS_STATUS,
4871                                 NL80211_BSS_STATUS_ASSOCIATED))
4872                         goto nla_put_failure;
4873                 break;
4874         case NL80211_IFTYPE_ADHOC:
4875                 if (intbss == wdev->current_bss &&
4876                     nla_put_u32(msg, NL80211_BSS_STATUS,
4877                                 NL80211_BSS_STATUS_IBSS_JOINED))
4878                         goto nla_put_failure;
4879                 break;
4880         default:
4881                 break;
4882         }
4883
4884         nla_nest_end(msg, bss);
4885
4886         return genlmsg_end(msg, hdr);
4887
4888  nla_put_failure:
4889         genlmsg_cancel(msg, hdr);
4890         return -EMSGSIZE;
4891 }
4892
4893 static int nl80211_dump_scan(struct sk_buff *skb,
4894                              struct netlink_callback *cb)
4895 {
4896         struct cfg80211_registered_device *rdev;
4897         struct net_device *dev;
4898         struct cfg80211_internal_bss *scan;
4899         struct wireless_dev *wdev;
4900         int start = cb->args[1], idx = 0;
4901         int err;
4902
4903         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4904         if (err)
4905                 return err;
4906
4907         wdev = dev->ieee80211_ptr;
4908
4909         wdev_lock(wdev);
4910         spin_lock_bh(&rdev->bss_lock);
4911         cfg80211_bss_expire(rdev);
4912
4913         cb->seq = rdev->bss_generation;
4914
4915         list_for_each_entry(scan, &rdev->bss_list, list) {
4916                 if (++idx <= start)
4917                         continue;
4918                 if (nl80211_send_bss(skb, cb,
4919                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4920                                 rdev, wdev, scan) < 0) {
4921                         idx--;
4922                         break;
4923                 }
4924         }
4925
4926         spin_unlock_bh(&rdev->bss_lock);
4927         wdev_unlock(wdev);
4928
4929         cb->args[1] = idx;
4930         nl80211_finish_netdev_dump(rdev);
4931
4932         return skb->len;
4933 }
4934
4935 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
4936                                 int flags, struct net_device *dev,
4937                                 struct survey_info *survey)
4938 {
4939         void *hdr;
4940         struct nlattr *infoattr;
4941
4942         hdr = nl80211hdr_put(msg, portid, seq, flags,
4943                              NL80211_CMD_NEW_SURVEY_RESULTS);
4944         if (!hdr)
4945                 return -ENOMEM;
4946
4947         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4948                 goto nla_put_failure;
4949
4950         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4951         if (!infoattr)
4952                 goto nla_put_failure;
4953
4954         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4955                         survey->channel->center_freq))
4956                 goto nla_put_failure;
4957
4958         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4959             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4960                 goto nla_put_failure;
4961         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4962             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4963                 goto nla_put_failure;
4964         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4965             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4966                         survey->channel_time))
4967                 goto nla_put_failure;
4968         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4969             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4970                         survey->channel_time_busy))
4971                 goto nla_put_failure;
4972         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4973             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4974                         survey->channel_time_ext_busy))
4975                 goto nla_put_failure;
4976         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4977             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4978                         survey->channel_time_rx))
4979                 goto nla_put_failure;
4980         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4981             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4982                         survey->channel_time_tx))
4983                 goto nla_put_failure;
4984
4985         nla_nest_end(msg, infoattr);
4986
4987         return genlmsg_end(msg, hdr);
4988
4989  nla_put_failure:
4990         genlmsg_cancel(msg, hdr);
4991         return -EMSGSIZE;
4992 }
4993
4994 static int nl80211_dump_survey(struct sk_buff *skb,
4995                         struct netlink_callback *cb)
4996 {
4997         struct survey_info survey;
4998         struct cfg80211_registered_device *dev;
4999         struct net_device *netdev;
5000         int survey_idx = cb->args[1];
5001         int res;
5002
5003         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5004         if (res)
5005                 return res;
5006
5007         if (!dev->ops->dump_survey) {
5008                 res = -EOPNOTSUPP;
5009                 goto out_err;
5010         }
5011
5012         while (1) {
5013                 struct ieee80211_channel *chan;
5014
5015                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5016                 if (res == -ENOENT)
5017                         break;
5018                 if (res)
5019                         goto out_err;
5020
5021                 /* Survey without a channel doesn't make sense */
5022                 if (!survey.channel) {
5023                         res = -EINVAL;
5024                         goto out;
5025                 }
5026
5027                 chan = ieee80211_get_channel(&dev->wiphy,
5028                                              survey.channel->center_freq);
5029                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5030                         survey_idx++;
5031                         continue;
5032                 }
5033
5034                 if (nl80211_send_survey(skb,
5035                                 NETLINK_CB(cb->skb).portid,
5036                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5037                                 netdev,
5038                                 &survey) < 0)
5039                         goto out;
5040                 survey_idx++;
5041         }
5042
5043  out:
5044         cb->args[1] = survey_idx;
5045         res = skb->len;
5046  out_err:
5047         nl80211_finish_netdev_dump(dev);
5048         return res;
5049 }
5050
5051 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5052 {
5053         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5054                                   NL80211_WPA_VERSION_2));
5055 }
5056
5057 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5058 {
5059         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5060         struct net_device *dev = info->user_ptr[1];
5061         struct ieee80211_channel *chan;
5062         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5063         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5064         enum nl80211_auth_type auth_type;
5065         struct key_parse key;
5066         bool local_state_change;
5067
5068         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5069                 return -EINVAL;
5070
5071         if (!info->attrs[NL80211_ATTR_MAC])
5072                 return -EINVAL;
5073
5074         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5075                 return -EINVAL;
5076
5077         if (!info->attrs[NL80211_ATTR_SSID])
5078                 return -EINVAL;
5079
5080         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5081                 return -EINVAL;
5082
5083         err = nl80211_parse_key(info, &key);
5084         if (err)
5085                 return err;
5086
5087         if (key.idx >= 0) {
5088                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5089                         return -EINVAL;
5090                 if (!key.p.key || !key.p.key_len)
5091                         return -EINVAL;
5092                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5093                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5094                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5095                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5096                         return -EINVAL;
5097                 if (key.idx > 4)
5098                         return -EINVAL;
5099         } else {
5100                 key.p.key_len = 0;
5101                 key.p.key = NULL;
5102         }
5103
5104         if (key.idx >= 0) {
5105                 int i;
5106                 bool ok = false;
5107                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5108                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5109                                 ok = true;
5110                                 break;
5111                         }
5112                 }
5113                 if (!ok)
5114                         return -EINVAL;
5115         }
5116
5117         if (!rdev->ops->auth)
5118                 return -EOPNOTSUPP;
5119
5120         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5121             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5122                 return -EOPNOTSUPP;
5123
5124         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5125         chan = ieee80211_get_channel(&rdev->wiphy,
5126                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5127         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5128                 return -EINVAL;
5129
5130         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5131         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5132
5133         if (info->attrs[NL80211_ATTR_IE]) {
5134                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5135                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5136         }
5137
5138         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5139         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5140                 return -EINVAL;
5141
5142         if (auth_type == NL80211_AUTHTYPE_SAE &&
5143             !info->attrs[NL80211_ATTR_SAE_DATA])
5144                 return -EINVAL;
5145
5146         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5147                 if (auth_type != NL80211_AUTHTYPE_SAE)
5148                         return -EINVAL;
5149                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5150                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5151                 /* need to include at least Auth Transaction and Status Code */
5152                 if (sae_data_len < 4)
5153                         return -EINVAL;
5154         }
5155
5156         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5157
5158         /*
5159          * Since we no longer track auth state, ignore
5160          * requests to only change local state.
5161          */
5162         if (local_state_change)
5163                 return 0;
5164
5165         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5166                                   ssid, ssid_len, ie, ie_len,
5167                                   key.p.key, key.p.key_len, key.idx,
5168                                   sae_data, sae_data_len);
5169 }
5170
5171 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5172                                    struct genl_info *info,
5173                                    struct cfg80211_crypto_settings *settings,
5174                                    int cipher_limit)
5175 {
5176         memset(settings, 0, sizeof(*settings));
5177
5178         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5179
5180         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5181                 u16 proto;
5182                 proto = nla_get_u16(
5183                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5184                 settings->control_port_ethertype = cpu_to_be16(proto);
5185                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5186                     proto != ETH_P_PAE)
5187                         return -EINVAL;
5188                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5189                         settings->control_port_no_encrypt = true;
5190         } else
5191                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5192
5193         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5194                 void *data;
5195                 int len, i;
5196
5197                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5198                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5199                 settings->n_ciphers_pairwise = len / sizeof(u32);
5200
5201                 if (len % sizeof(u32))
5202                         return -EINVAL;
5203
5204                 if (settings->n_ciphers_pairwise > cipher_limit)
5205                         return -EINVAL;
5206
5207                 memcpy(settings->ciphers_pairwise, data, len);
5208
5209                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5210                         if (!cfg80211_supported_cipher_suite(
5211                                         &rdev->wiphy,
5212                                         settings->ciphers_pairwise[i]))
5213                                 return -EINVAL;
5214         }
5215
5216         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5217                 settings->cipher_group =
5218                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5219                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5220                                                      settings->cipher_group))
5221                         return -EINVAL;
5222         }
5223
5224         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5225                 settings->wpa_versions =
5226                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5227                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5228                         return -EINVAL;
5229         }
5230
5231         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5232                 void *data;
5233                 int len;
5234
5235                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5236                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5237                 settings->n_akm_suites = len / sizeof(u32);
5238
5239                 if (len % sizeof(u32))
5240                         return -EINVAL;
5241
5242                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5243                         return -EINVAL;
5244
5245                 memcpy(settings->akm_suites, data, len);
5246         }
5247
5248         return 0;
5249 }
5250
5251 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5252 {
5253         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5254         struct net_device *dev = info->user_ptr[1];
5255         struct cfg80211_crypto_settings crypto;
5256         struct ieee80211_channel *chan;
5257         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5258         int err, ssid_len, ie_len = 0;
5259         bool use_mfp = false;
5260         u32 flags = 0;
5261         struct ieee80211_ht_cap *ht_capa = NULL;
5262         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5263
5264         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5265                 return -EINVAL;
5266
5267         if (!info->attrs[NL80211_ATTR_MAC] ||
5268             !info->attrs[NL80211_ATTR_SSID] ||
5269             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5270                 return -EINVAL;
5271
5272         if (!rdev->ops->assoc)
5273                 return -EOPNOTSUPP;
5274
5275         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5276             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5277                 return -EOPNOTSUPP;
5278
5279         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5280
5281         chan = ieee80211_get_channel(&rdev->wiphy,
5282                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5283         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5284                 return -EINVAL;
5285
5286         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5287         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5288
5289         if (info->attrs[NL80211_ATTR_IE]) {
5290                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5291                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5292         }
5293
5294         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5295                 enum nl80211_mfp mfp =
5296                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5297                 if (mfp == NL80211_MFP_REQUIRED)
5298                         use_mfp = true;
5299                 else if (mfp != NL80211_MFP_NO)
5300                         return -EINVAL;
5301         }
5302
5303         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5304                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5305
5306         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5307                 flags |= ASSOC_REQ_DISABLE_HT;
5308
5309         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5310                 ht_capa_mask =
5311                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5312
5313         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5314                 if (!ht_capa_mask)
5315                         return -EINVAL;
5316                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5317         }
5318
5319         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5320         if (!err)
5321                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5322                                           ssid, ssid_len, ie, ie_len, use_mfp,
5323                                           &crypto, flags, ht_capa,
5324                                           ht_capa_mask);
5325
5326         return err;
5327 }
5328
5329 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5330 {
5331         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5332         struct net_device *dev = info->user_ptr[1];
5333         const u8 *ie = NULL, *bssid;
5334         int ie_len = 0;
5335         u16 reason_code;
5336         bool local_state_change;
5337
5338         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5339                 return -EINVAL;
5340
5341         if (!info->attrs[NL80211_ATTR_MAC])
5342                 return -EINVAL;
5343
5344         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5345                 return -EINVAL;
5346
5347         if (!rdev->ops->deauth)
5348                 return -EOPNOTSUPP;
5349
5350         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5351             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5352                 return -EOPNOTSUPP;
5353
5354         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5355
5356         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5357         if (reason_code == 0) {
5358                 /* Reason Code 0 is reserved */
5359                 return -EINVAL;
5360         }
5361
5362         if (info->attrs[NL80211_ATTR_IE]) {
5363                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5364                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5365         }
5366
5367         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5368
5369         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5370                                     local_state_change);
5371 }
5372
5373 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5374 {
5375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5376         struct net_device *dev = info->user_ptr[1];
5377         const u8 *ie = NULL, *bssid;
5378         int ie_len = 0;
5379         u16 reason_code;
5380         bool local_state_change;
5381
5382         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5383                 return -EINVAL;
5384
5385         if (!info->attrs[NL80211_ATTR_MAC])
5386                 return -EINVAL;
5387
5388         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5389                 return -EINVAL;
5390
5391         if (!rdev->ops->disassoc)
5392                 return -EOPNOTSUPP;
5393
5394         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5395             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5396                 return -EOPNOTSUPP;
5397
5398         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5399
5400         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5401         if (reason_code == 0) {
5402                 /* Reason Code 0 is reserved */
5403                 return -EINVAL;
5404         }
5405
5406         if (info->attrs[NL80211_ATTR_IE]) {
5407                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5408                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5409         }
5410
5411         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5412
5413         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5414                                       local_state_change);
5415 }
5416
5417 static bool
5418 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5419                          int mcast_rate[IEEE80211_NUM_BANDS],
5420                          int rateval)
5421 {
5422         struct wiphy *wiphy = &rdev->wiphy;
5423         bool found = false;
5424         int band, i;
5425
5426         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5427                 struct ieee80211_supported_band *sband;
5428
5429                 sband = wiphy->bands[band];
5430                 if (!sband)
5431                         continue;
5432
5433                 for (i = 0; i < sband->n_bitrates; i++) {
5434                         if (sband->bitrates[i].bitrate == rateval) {
5435                                 mcast_rate[band] = i + 1;
5436                                 found = true;
5437                                 break;
5438                         }
5439                 }
5440         }
5441
5442         return found;
5443 }
5444
5445 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5446 {
5447         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5448         struct net_device *dev = info->user_ptr[1];
5449         struct cfg80211_ibss_params ibss;
5450         struct wiphy *wiphy;
5451         struct cfg80211_cached_keys *connkeys = NULL;
5452         int err;
5453
5454         memset(&ibss, 0, sizeof(ibss));
5455
5456         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5457                 return -EINVAL;
5458
5459         if (!info->attrs[NL80211_ATTR_SSID] ||
5460             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5461                 return -EINVAL;
5462
5463         ibss.beacon_interval = 100;
5464
5465         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5466                 ibss.beacon_interval =
5467                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5468                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5469                         return -EINVAL;
5470         }
5471
5472         if (!rdev->ops->join_ibss)
5473                 return -EOPNOTSUPP;
5474
5475         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5476                 return -EOPNOTSUPP;
5477
5478         wiphy = &rdev->wiphy;
5479
5480         if (info->attrs[NL80211_ATTR_MAC]) {
5481                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5482
5483                 if (!is_valid_ether_addr(ibss.bssid))
5484                         return -EINVAL;
5485         }
5486         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5487         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5488
5489         if (info->attrs[NL80211_ATTR_IE]) {
5490                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5491                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5492         }
5493
5494         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5495         if (err)
5496                 return err;
5497
5498         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5499                 return -EINVAL;
5500
5501         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5502                 return -EINVAL;
5503         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5504             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5505
5506         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5507         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5508
5509         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5510                 u8 *rates =
5511                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5512                 int n_rates =
5513                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5514                 struct ieee80211_supported_band *sband =
5515                         wiphy->bands[ibss.chandef.chan->band];
5516
5517                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5518                                              &ibss.basic_rates);
5519                 if (err)
5520                         return err;
5521         }
5522
5523         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5524             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5525                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5526                 return -EINVAL;
5527
5528         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5529                 bool no_ht = false;
5530
5531                 connkeys = nl80211_parse_connkeys(rdev,
5532                                           info->attrs[NL80211_ATTR_KEYS],
5533                                           &no_ht);
5534                 if (IS_ERR(connkeys))
5535                         return PTR_ERR(connkeys);
5536
5537                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5538                     no_ht) {
5539                         kfree(connkeys);
5540                         return -EINVAL;
5541                 }
5542         }
5543
5544         ibss.control_port =
5545                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5546
5547         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5548         if (err)
5549                 kfree(connkeys);
5550         return err;
5551 }
5552
5553 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5554 {
5555         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5556         struct net_device *dev = info->user_ptr[1];
5557
5558         if (!rdev->ops->leave_ibss)
5559                 return -EOPNOTSUPP;
5560
5561         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5562                 return -EOPNOTSUPP;
5563
5564         return cfg80211_leave_ibss(rdev, dev, false);
5565 }
5566
5567 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5568 {
5569         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5570         struct net_device *dev = info->user_ptr[1];
5571         int mcast_rate[IEEE80211_NUM_BANDS];
5572         u32 nla_rate;
5573         int err;
5574
5575         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5576             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5577                 return -EOPNOTSUPP;
5578
5579         if (!rdev->ops->set_mcast_rate)
5580                 return -EOPNOTSUPP;
5581
5582         memset(mcast_rate, 0, sizeof(mcast_rate));
5583
5584         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5585                 return -EINVAL;
5586
5587         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5588         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5589                 return -EINVAL;
5590
5591         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5592
5593         return err;
5594 }
5595
5596
5597 #ifdef CONFIG_NL80211_TESTMODE
5598 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5599         .name = "testmode",
5600 };
5601
5602 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5603 {
5604         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5605         int err;
5606
5607         if (!info->attrs[NL80211_ATTR_TESTDATA])
5608                 return -EINVAL;
5609
5610         err = -EOPNOTSUPP;
5611         if (rdev->ops->testmode_cmd) {
5612                 rdev->testmode_info = info;
5613                 err = rdev_testmode_cmd(rdev,
5614                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5615                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5616                 rdev->testmode_info = NULL;
5617         }
5618
5619         return err;
5620 }
5621
5622 static int nl80211_testmode_dump(struct sk_buff *skb,
5623                                  struct netlink_callback *cb)
5624 {
5625         struct cfg80211_registered_device *rdev;
5626         int err;
5627         long phy_idx;
5628         void *data = NULL;
5629         int data_len = 0;
5630
5631         if (cb->args[0]) {
5632                 /*
5633                  * 0 is a valid index, but not valid for args[0],
5634                  * so we need to offset by 1.
5635                  */
5636                 phy_idx = cb->args[0] - 1;
5637         } else {
5638                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5639                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5640                                   nl80211_policy);
5641                 if (err)
5642                         return err;
5643
5644                 mutex_lock(&cfg80211_mutex);
5645                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5646                                                   nl80211_fam.attrbuf);
5647                 if (IS_ERR(rdev)) {
5648                         mutex_unlock(&cfg80211_mutex);
5649                         return PTR_ERR(rdev);
5650                 }
5651                 phy_idx = rdev->wiphy_idx;
5652                 rdev = NULL;
5653                 mutex_unlock(&cfg80211_mutex);
5654
5655                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5656                         cb->args[1] =
5657                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5658         }
5659
5660         if (cb->args[1]) {
5661                 data = nla_data((void *)cb->args[1]);
5662                 data_len = nla_len((void *)cb->args[1]);
5663         }
5664
5665         mutex_lock(&cfg80211_mutex);
5666         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5667         if (!rdev) {
5668                 mutex_unlock(&cfg80211_mutex);
5669                 return -ENOENT;
5670         }
5671         cfg80211_lock_rdev(rdev);
5672         mutex_unlock(&cfg80211_mutex);
5673
5674         if (!rdev->ops->testmode_dump) {
5675                 err = -EOPNOTSUPP;
5676                 goto out_err;
5677         }
5678
5679         while (1) {
5680                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
5681                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5682                                            NL80211_CMD_TESTMODE);
5683                 struct nlattr *tmdata;
5684
5685                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5686                         genlmsg_cancel(skb, hdr);
5687                         break;
5688                 }
5689
5690                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5691                 if (!tmdata) {
5692                         genlmsg_cancel(skb, hdr);
5693                         break;
5694                 }
5695                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
5696                 nla_nest_end(skb, tmdata);
5697
5698                 if (err == -ENOBUFS || err == -ENOENT) {
5699                         genlmsg_cancel(skb, hdr);
5700                         break;
5701                 } else if (err) {
5702                         genlmsg_cancel(skb, hdr);
5703                         goto out_err;
5704                 }
5705
5706                 genlmsg_end(skb, hdr);
5707         }
5708
5709         err = skb->len;
5710         /* see above */
5711         cb->args[0] = phy_idx + 1;
5712  out_err:
5713         cfg80211_unlock_rdev(rdev);
5714         return err;
5715 }
5716
5717 static struct sk_buff *
5718 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5719                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
5720 {
5721         struct sk_buff *skb;
5722         void *hdr;
5723         struct nlattr *data;
5724
5725         skb = nlmsg_new(approxlen + 100, gfp);
5726         if (!skb)
5727                 return NULL;
5728
5729         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
5730         if (!hdr) {
5731                 kfree_skb(skb);
5732                 return NULL;
5733         }
5734
5735         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5736                 goto nla_put_failure;
5737         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5738
5739         ((void **)skb->cb)[0] = rdev;
5740         ((void **)skb->cb)[1] = hdr;
5741         ((void **)skb->cb)[2] = data;
5742
5743         return skb;
5744
5745  nla_put_failure:
5746         kfree_skb(skb);
5747         return NULL;
5748 }
5749
5750 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5751                                                   int approxlen)
5752 {
5753         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5754
5755         if (WARN_ON(!rdev->testmode_info))
5756                 return NULL;
5757
5758         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5759                                 rdev->testmode_info->snd_portid,
5760                                 rdev->testmode_info->snd_seq,
5761                                 GFP_KERNEL);
5762 }
5763 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5764
5765 int cfg80211_testmode_reply(struct sk_buff *skb)
5766 {
5767         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5768         void *hdr = ((void **)skb->cb)[1];
5769         struct nlattr *data = ((void **)skb->cb)[2];
5770
5771         if (WARN_ON(!rdev->testmode_info)) {
5772                 kfree_skb(skb);
5773                 return -EINVAL;
5774         }
5775
5776         nla_nest_end(skb, data);
5777         genlmsg_end(skb, hdr);
5778         return genlmsg_reply(skb, rdev->testmode_info);
5779 }
5780 EXPORT_SYMBOL(cfg80211_testmode_reply);
5781
5782 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5783                                                   int approxlen, gfp_t gfp)
5784 {
5785         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5786
5787         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5788 }
5789 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5790
5791 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5792 {
5793         void *hdr = ((void **)skb->cb)[1];
5794         struct nlattr *data = ((void **)skb->cb)[2];
5795
5796         nla_nest_end(skb, data);
5797         genlmsg_end(skb, hdr);
5798         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5799 }
5800 EXPORT_SYMBOL(cfg80211_testmode_event);
5801 #endif
5802
5803 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5804 {
5805         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5806         struct net_device *dev = info->user_ptr[1];
5807         struct cfg80211_connect_params connect;
5808         struct wiphy *wiphy;
5809         struct cfg80211_cached_keys *connkeys = NULL;
5810         int err;
5811
5812         memset(&connect, 0, sizeof(connect));
5813
5814         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5815                 return -EINVAL;
5816
5817         if (!info->attrs[NL80211_ATTR_SSID] ||
5818             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5819                 return -EINVAL;
5820
5821         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5822                 connect.auth_type =
5823                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5824                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
5825                                              NL80211_CMD_CONNECT))
5826                         return -EINVAL;
5827         } else
5828                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5829
5830         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5831
5832         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5833                                       NL80211_MAX_NR_CIPHER_SUITES);
5834         if (err)
5835                 return err;
5836
5837         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5838             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5839                 return -EOPNOTSUPP;
5840
5841         wiphy = &rdev->wiphy;
5842
5843         connect.bg_scan_period = -1;
5844         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5845                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5846                 connect.bg_scan_period =
5847                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5848         }
5849
5850         if (info->attrs[NL80211_ATTR_MAC])
5851                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5852         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5853         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5854
5855         if (info->attrs[NL80211_ATTR_IE]) {
5856                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5857                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5858         }
5859
5860         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5861                 connect.channel =
5862                         ieee80211_get_channel(wiphy,
5863                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5864                 if (!connect.channel ||
5865                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5866                         return -EINVAL;
5867         }
5868
5869         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5870                 connkeys = nl80211_parse_connkeys(rdev,
5871                                           info->attrs[NL80211_ATTR_KEYS], NULL);
5872                 if (IS_ERR(connkeys))
5873                         return PTR_ERR(connkeys);
5874         }
5875
5876         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5877                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5878
5879         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5880                 memcpy(&connect.ht_capa_mask,
5881                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5882                        sizeof(connect.ht_capa_mask));
5883
5884         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5885                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
5886                         kfree(connkeys);
5887                         return -EINVAL;
5888                 }
5889                 memcpy(&connect.ht_capa,
5890                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5891                        sizeof(connect.ht_capa));
5892         }
5893
5894         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5895         if (err)
5896                 kfree(connkeys);
5897         return err;
5898 }
5899
5900 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5901 {
5902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5903         struct net_device *dev = info->user_ptr[1];
5904         u16 reason;
5905
5906         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5907                 reason = WLAN_REASON_DEAUTH_LEAVING;
5908         else
5909                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5910
5911         if (reason == 0)
5912                 return -EINVAL;
5913
5914         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5915             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5916                 return -EOPNOTSUPP;
5917
5918         return cfg80211_disconnect(rdev, dev, reason, true);
5919 }
5920
5921 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5922 {
5923         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5924         struct net *net;
5925         int err;
5926         u32 pid;
5927
5928         if (!info->attrs[NL80211_ATTR_PID])
5929                 return -EINVAL;
5930
5931         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5932
5933         net = get_net_ns_by_pid(pid);
5934         if (IS_ERR(net))
5935                 return PTR_ERR(net);
5936
5937         err = 0;
5938
5939         /* check if anything to do */
5940         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5941                 err = cfg80211_switch_netns(rdev, net);
5942
5943         put_net(net);
5944         return err;
5945 }
5946
5947 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5948 {
5949         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5950         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5951                         struct cfg80211_pmksa *pmksa) = NULL;
5952         struct net_device *dev = info->user_ptr[1];
5953         struct cfg80211_pmksa pmksa;
5954
5955         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5956
5957         if (!info->attrs[NL80211_ATTR_MAC])
5958                 return -EINVAL;
5959
5960         if (!info->attrs[NL80211_ATTR_PMKID])
5961                 return -EINVAL;
5962
5963         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5964         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5965
5966         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5967             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5968                 return -EOPNOTSUPP;
5969
5970         switch (info->genlhdr->cmd) {
5971         case NL80211_CMD_SET_PMKSA:
5972                 rdev_ops = rdev->ops->set_pmksa;
5973                 break;
5974         case NL80211_CMD_DEL_PMKSA:
5975                 rdev_ops = rdev->ops->del_pmksa;
5976                 break;
5977         default:
5978                 WARN_ON(1);
5979                 break;
5980         }
5981
5982         if (!rdev_ops)
5983                 return -EOPNOTSUPP;
5984
5985         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5986 }
5987
5988 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5989 {
5990         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5991         struct net_device *dev = info->user_ptr[1];
5992
5993         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5994             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5995                 return -EOPNOTSUPP;
5996
5997         if (!rdev->ops->flush_pmksa)
5998                 return -EOPNOTSUPP;
5999
6000         return rdev_flush_pmksa(rdev, dev);
6001 }
6002
6003 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6004 {
6005         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6006         struct net_device *dev = info->user_ptr[1];
6007         u8 action_code, dialog_token;
6008         u16 status_code;
6009         u8 *peer;
6010
6011         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6012             !rdev->ops->tdls_mgmt)
6013                 return -EOPNOTSUPP;
6014
6015         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6016             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6017             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6018             !info->attrs[NL80211_ATTR_IE] ||
6019             !info->attrs[NL80211_ATTR_MAC])
6020                 return -EINVAL;
6021
6022         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6023         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6024         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6025         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6026
6027         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6028                               dialog_token, status_code,
6029                               nla_data(info->attrs[NL80211_ATTR_IE]),
6030                               nla_len(info->attrs[NL80211_ATTR_IE]));
6031 }
6032
6033 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6034 {
6035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6036         struct net_device *dev = info->user_ptr[1];
6037         enum nl80211_tdls_operation operation;
6038         u8 *peer;
6039
6040         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6041             !rdev->ops->tdls_oper)
6042                 return -EOPNOTSUPP;
6043
6044         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6045             !info->attrs[NL80211_ATTR_MAC])
6046                 return -EINVAL;
6047
6048         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6049         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6050
6051         return rdev_tdls_oper(rdev, dev, peer, operation);
6052 }
6053
6054 static int nl80211_remain_on_channel(struct sk_buff *skb,
6055                                      struct genl_info *info)
6056 {
6057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6058         struct wireless_dev *wdev = info->user_ptr[1];
6059         struct cfg80211_chan_def chandef;
6060         struct sk_buff *msg;
6061         void *hdr;
6062         u64 cookie;
6063         u32 duration;
6064         int err;
6065
6066         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6067             !info->attrs[NL80211_ATTR_DURATION])
6068                 return -EINVAL;
6069
6070         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6071
6072         if (!rdev->ops->remain_on_channel ||
6073             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6074                 return -EOPNOTSUPP;
6075
6076         /*
6077          * We should be on that channel for at least a minimum amount of
6078          * time (10ms) but no longer than the driver supports.
6079          */
6080         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6081             duration > rdev->wiphy.max_remain_on_channel_duration)
6082                 return -EINVAL;
6083
6084         err = nl80211_parse_chandef(rdev, info, &chandef);
6085         if (err)
6086                 return err;
6087
6088         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6089         if (!msg)
6090                 return -ENOMEM;
6091
6092         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6093                              NL80211_CMD_REMAIN_ON_CHANNEL);
6094
6095         if (IS_ERR(hdr)) {
6096                 err = PTR_ERR(hdr);
6097                 goto free_msg;
6098         }
6099
6100         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6101                                      duration, &cookie);
6102
6103         if (err)
6104                 goto free_msg;
6105
6106         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6107                 goto nla_put_failure;
6108
6109         genlmsg_end(msg, hdr);
6110
6111         return genlmsg_reply(msg, info);
6112
6113  nla_put_failure:
6114         err = -ENOBUFS;
6115  free_msg:
6116         nlmsg_free(msg);
6117         return err;
6118 }
6119
6120 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6121                                             struct genl_info *info)
6122 {
6123         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6124         struct wireless_dev *wdev = info->user_ptr[1];
6125         u64 cookie;
6126
6127         if (!info->attrs[NL80211_ATTR_COOKIE])
6128                 return -EINVAL;
6129
6130         if (!rdev->ops->cancel_remain_on_channel)
6131                 return -EOPNOTSUPP;
6132
6133         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6134
6135         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6136 }
6137
6138 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6139                            u8 *rates, u8 rates_len)
6140 {
6141         u8 i;
6142         u32 mask = 0;
6143
6144         for (i = 0; i < rates_len; i++) {
6145                 int rate = (rates[i] & 0x7f) * 5;
6146                 int ridx;
6147                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6148                         struct ieee80211_rate *srate =
6149                                 &sband->bitrates[ridx];
6150                         if (rate == srate->bitrate) {
6151                                 mask |= 1 << ridx;
6152                                 break;
6153                         }
6154                 }
6155                 if (ridx == sband->n_bitrates)
6156                         return 0; /* rate not found */
6157         }
6158
6159         return mask;
6160 }
6161
6162 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6163                                u8 *rates, u8 rates_len,
6164                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6165 {
6166         u8 i;
6167
6168         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6169
6170         for (i = 0; i < rates_len; i++) {
6171                 int ridx, rbit;
6172
6173                 ridx = rates[i] / 8;
6174                 rbit = BIT(rates[i] % 8);
6175
6176                 /* check validity */
6177                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6178                         return false;
6179
6180                 /* check availability */
6181                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6182                         mcs[ridx] |= rbit;
6183                 else
6184                         return false;
6185         }
6186
6187         return true;
6188 }
6189
6190 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6191         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6192                                     .len = NL80211_MAX_SUPP_RATES },
6193         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6194                                  .len = NL80211_MAX_SUPP_HT_RATES },
6195 };
6196
6197 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6198                                        struct genl_info *info)
6199 {
6200         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6201         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6202         struct cfg80211_bitrate_mask mask;
6203         int rem, i;
6204         struct net_device *dev = info->user_ptr[1];
6205         struct nlattr *tx_rates;
6206         struct ieee80211_supported_band *sband;
6207
6208         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6209                 return -EINVAL;
6210
6211         if (!rdev->ops->set_bitrate_mask)
6212                 return -EOPNOTSUPP;
6213
6214         memset(&mask, 0, sizeof(mask));
6215         /* Default to all rates enabled */
6216         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6217                 sband = rdev->wiphy.bands[i];
6218                 mask.control[i].legacy =
6219                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6220                 if (sband)
6221                         memcpy(mask.control[i].mcs,
6222                                sband->ht_cap.mcs.rx_mask,
6223                                sizeof(mask.control[i].mcs));
6224                 else
6225                         memset(mask.control[i].mcs, 0,
6226                                sizeof(mask.control[i].mcs));
6227         }
6228
6229         /*
6230          * The nested attribute uses enum nl80211_band as the index. This maps
6231          * directly to the enum ieee80211_band values used in cfg80211.
6232          */
6233         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6234         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6235         {
6236                 enum ieee80211_band band = nla_type(tx_rates);
6237                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6238                         return -EINVAL;
6239                 sband = rdev->wiphy.bands[band];
6240                 if (sband == NULL)
6241                         return -EINVAL;
6242                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6243                           nla_len(tx_rates), nl80211_txattr_policy);
6244                 if (tb[NL80211_TXRATE_LEGACY]) {
6245                         mask.control[band].legacy = rateset_to_mask(
6246                                 sband,
6247                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6248                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6249                         if ((mask.control[band].legacy == 0) &&
6250                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6251                                 return -EINVAL;
6252                 }
6253                 if (tb[NL80211_TXRATE_MCS]) {
6254                         if (!ht_rateset_to_mask(
6255                                         sband,
6256                                         nla_data(tb[NL80211_TXRATE_MCS]),
6257                                         nla_len(tb[NL80211_TXRATE_MCS]),
6258                                         mask.control[band].mcs))
6259                                 return -EINVAL;
6260                 }
6261
6262                 if (mask.control[band].legacy == 0) {
6263                         /* don't allow empty legacy rates if HT
6264                          * is not even supported. */
6265                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6266                                 return -EINVAL;
6267
6268                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6269                                 if (mask.control[band].mcs[i])
6270                                         break;
6271
6272                         /* legacy and mcs rates may not be both empty */
6273                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6274                                 return -EINVAL;
6275                 }
6276         }
6277
6278         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6279 }
6280
6281 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6282 {
6283         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6284         struct wireless_dev *wdev = info->user_ptr[1];
6285         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6286
6287         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6288                 return -EINVAL;
6289
6290         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6291                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6292
6293         switch (wdev->iftype) {
6294         case NL80211_IFTYPE_STATION:
6295         case NL80211_IFTYPE_ADHOC:
6296         case NL80211_IFTYPE_P2P_CLIENT:
6297         case NL80211_IFTYPE_AP:
6298         case NL80211_IFTYPE_AP_VLAN:
6299         case NL80211_IFTYPE_MESH_POINT:
6300         case NL80211_IFTYPE_P2P_GO:
6301         case NL80211_IFTYPE_P2P_DEVICE:
6302                 break;
6303         default:
6304                 return -EOPNOTSUPP;
6305         }
6306
6307         /* not much point in registering if we can't reply */
6308         if (!rdev->ops->mgmt_tx)
6309                 return -EOPNOTSUPP;
6310
6311         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6312                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6313                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6314 }
6315
6316 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6317 {
6318         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6319         struct wireless_dev *wdev = info->user_ptr[1];
6320         struct cfg80211_chan_def chandef;
6321         int err;
6322         void *hdr = NULL;
6323         u64 cookie;
6324         struct sk_buff *msg = NULL;
6325         unsigned int wait = 0;
6326         bool offchan, no_cck, dont_wait_for_ack;
6327
6328         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6329
6330         if (!info->attrs[NL80211_ATTR_FRAME])
6331                 return -EINVAL;
6332
6333         if (!rdev->ops->mgmt_tx)
6334                 return -EOPNOTSUPP;
6335
6336         switch (wdev->iftype) {
6337         case NL80211_IFTYPE_STATION:
6338         case NL80211_IFTYPE_ADHOC:
6339         case NL80211_IFTYPE_P2P_CLIENT:
6340         case NL80211_IFTYPE_AP:
6341         case NL80211_IFTYPE_AP_VLAN:
6342         case NL80211_IFTYPE_MESH_POINT:
6343         case NL80211_IFTYPE_P2P_GO:
6344         case NL80211_IFTYPE_P2P_DEVICE:
6345                 break;
6346         default:
6347                 return -EOPNOTSUPP;
6348         }
6349
6350         if (info->attrs[NL80211_ATTR_DURATION]) {
6351                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6352                         return -EINVAL;
6353                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6354
6355                 /*
6356                  * We should wait on the channel for at least a minimum amount
6357                  * of time (10ms) but no longer than the driver supports.
6358                  */
6359                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6360                     wait > rdev->wiphy.max_remain_on_channel_duration)
6361                         return -EINVAL;
6362
6363         }
6364
6365         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6366
6367         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6368                 return -EINVAL;
6369
6370         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6371
6372         err = nl80211_parse_chandef(rdev, info, &chandef);
6373         if (err)
6374                 return err;
6375
6376         if (!dont_wait_for_ack) {
6377                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6378                 if (!msg)
6379                         return -ENOMEM;
6380
6381                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6382                                      NL80211_CMD_FRAME);
6383
6384                 if (IS_ERR(hdr)) {
6385                         err = PTR_ERR(hdr);
6386                         goto free_msg;
6387                 }
6388         }
6389
6390         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6391                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6392                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6393                                     no_cck, dont_wait_for_ack, &cookie);
6394         if (err)
6395                 goto free_msg;
6396
6397         if (msg) {
6398                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6399                         goto nla_put_failure;
6400
6401                 genlmsg_end(msg, hdr);
6402                 return genlmsg_reply(msg, info);
6403         }
6404
6405         return 0;
6406
6407  nla_put_failure:
6408         err = -ENOBUFS;
6409  free_msg:
6410         nlmsg_free(msg);
6411         return err;
6412 }
6413
6414 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6415 {
6416         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6417         struct wireless_dev *wdev = info->user_ptr[1];
6418         u64 cookie;
6419
6420         if (!info->attrs[NL80211_ATTR_COOKIE])
6421                 return -EINVAL;
6422
6423         if (!rdev->ops->mgmt_tx_cancel_wait)
6424                 return -EOPNOTSUPP;
6425
6426         switch (wdev->iftype) {
6427         case NL80211_IFTYPE_STATION:
6428         case NL80211_IFTYPE_ADHOC:
6429         case NL80211_IFTYPE_P2P_CLIENT:
6430         case NL80211_IFTYPE_AP:
6431         case NL80211_IFTYPE_AP_VLAN:
6432         case NL80211_IFTYPE_P2P_GO:
6433         case NL80211_IFTYPE_P2P_DEVICE:
6434                 break;
6435         default:
6436                 return -EOPNOTSUPP;
6437         }
6438
6439         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6440
6441         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6442 }
6443
6444 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6445 {
6446         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6447         struct wireless_dev *wdev;
6448         struct net_device *dev = info->user_ptr[1];
6449         u8 ps_state;
6450         bool state;
6451         int err;
6452
6453         if (!info->attrs[NL80211_ATTR_PS_STATE])
6454                 return -EINVAL;
6455
6456         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6457
6458         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6459                 return -EINVAL;
6460
6461         wdev = dev->ieee80211_ptr;
6462
6463         if (!rdev->ops->set_power_mgmt)
6464                 return -EOPNOTSUPP;
6465
6466         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6467
6468         if (state == wdev->ps)
6469                 return 0;
6470
6471         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6472         if (!err)
6473                 wdev->ps = state;
6474         return err;
6475 }
6476
6477 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6478 {
6479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6480         enum nl80211_ps_state ps_state;
6481         struct wireless_dev *wdev;
6482         struct net_device *dev = info->user_ptr[1];
6483         struct sk_buff *msg;
6484         void *hdr;
6485         int err;
6486
6487         wdev = dev->ieee80211_ptr;
6488
6489         if (!rdev->ops->set_power_mgmt)
6490                 return -EOPNOTSUPP;
6491
6492         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6493         if (!msg)
6494                 return -ENOMEM;
6495
6496         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6497                              NL80211_CMD_GET_POWER_SAVE);
6498         if (!hdr) {
6499                 err = -ENOBUFS;
6500                 goto free_msg;
6501         }
6502
6503         if (wdev->ps)
6504                 ps_state = NL80211_PS_ENABLED;
6505         else
6506                 ps_state = NL80211_PS_DISABLED;
6507
6508         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6509                 goto nla_put_failure;
6510
6511         genlmsg_end(msg, hdr);
6512         return genlmsg_reply(msg, info);
6513
6514  nla_put_failure:
6515         err = -ENOBUFS;
6516  free_msg:
6517         nlmsg_free(msg);
6518         return err;
6519 }
6520
6521 static struct nla_policy
6522 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6523         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6524         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6525         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6526         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6527         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6528         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6529 };
6530
6531 static int nl80211_set_cqm_txe(struct genl_info *info,
6532                                 u32 rate, u32 pkts, u32 intvl)
6533 {
6534         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6535         struct wireless_dev *wdev;
6536         struct net_device *dev = info->user_ptr[1];
6537
6538         if ((rate < 0 || rate > 100) ||
6539             (intvl < 0 || intvl > NL80211_CQM_TXE_MAX_INTVL))
6540                 return -EINVAL;
6541
6542         wdev = dev->ieee80211_ptr;
6543
6544         if (!rdev->ops->set_cqm_txe_config)
6545                 return -EOPNOTSUPP;
6546
6547         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6548             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6549                 return -EOPNOTSUPP;
6550
6551         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6552 }
6553
6554 static int nl80211_set_cqm_rssi(struct genl_info *info,
6555                                 s32 threshold, u32 hysteresis)
6556 {
6557         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6558         struct wireless_dev *wdev;
6559         struct net_device *dev = info->user_ptr[1];
6560
6561         if (threshold > 0)
6562                 return -EINVAL;
6563
6564         wdev = dev->ieee80211_ptr;
6565
6566         if (!rdev->ops->set_cqm_rssi_config)
6567                 return -EOPNOTSUPP;
6568
6569         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6570             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6571                 return -EOPNOTSUPP;
6572
6573         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6574 }
6575
6576 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6577 {
6578         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6579         struct nlattr *cqm;
6580         int err;
6581
6582         cqm = info->attrs[NL80211_ATTR_CQM];
6583         if (!cqm) {
6584                 err = -EINVAL;
6585                 goto out;
6586         }
6587
6588         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6589                                nl80211_attr_cqm_policy);
6590         if (err)
6591                 goto out;
6592
6593         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6594             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6595                 s32 threshold;
6596                 u32 hysteresis;
6597                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6598                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6599                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6600         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
6601                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
6602                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
6603                 u32 rate, pkts, intvl;
6604                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
6605                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
6606                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
6607                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
6608         } else
6609                 err = -EINVAL;
6610
6611 out:
6612         return err;
6613 }
6614
6615 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6616 {
6617         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6618         struct net_device *dev = info->user_ptr[1];
6619         struct mesh_config cfg;
6620         struct mesh_setup setup;
6621         int err;
6622
6623         /* start with default */
6624         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6625         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6626
6627         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6628                 /* and parse parameters if given */
6629                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6630                 if (err)
6631                         return err;
6632         }
6633
6634         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6635             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6636                 return -EINVAL;
6637
6638         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6639         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6640
6641         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6642             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6643                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6644                         return -EINVAL;
6645
6646         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6647                 /* parse additional setup parameters if given */
6648                 err = nl80211_parse_mesh_setup(info, &setup);
6649                 if (err)
6650                         return err;
6651         }
6652
6653         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6654                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
6655                 if (err)
6656                         return err;
6657         } else {
6658                 /* cfg80211_join_mesh() will sort it out */
6659                 setup.chandef.chan = NULL;
6660         }
6661
6662         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6663 }
6664
6665 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6666 {
6667         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6668         struct net_device *dev = info->user_ptr[1];
6669
6670         return cfg80211_leave_mesh(rdev, dev);
6671 }
6672
6673 #ifdef CONFIG_PM
6674 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6675 {
6676         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6677         struct sk_buff *msg;
6678         void *hdr;
6679
6680         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6681                 return -EOPNOTSUPP;
6682
6683         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6684         if (!msg)
6685                 return -ENOMEM;
6686
6687         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6688                              NL80211_CMD_GET_WOWLAN);
6689         if (!hdr)
6690                 goto nla_put_failure;
6691
6692         if (rdev->wowlan) {
6693                 struct nlattr *nl_wowlan;
6694
6695                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6696                 if (!nl_wowlan)
6697                         goto nla_put_failure;
6698
6699                 if ((rdev->wowlan->any &&
6700                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6701                     (rdev->wowlan->disconnect &&
6702                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6703                     (rdev->wowlan->magic_pkt &&
6704                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6705                     (rdev->wowlan->gtk_rekey_failure &&
6706                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6707                     (rdev->wowlan->eap_identity_req &&
6708                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6709                     (rdev->wowlan->four_way_handshake &&
6710                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6711                     (rdev->wowlan->rfkill_release &&
6712                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6713                         goto nla_put_failure;
6714                 if (rdev->wowlan->n_patterns) {
6715                         struct nlattr *nl_pats, *nl_pat;
6716                         int i, pat_len;
6717
6718                         nl_pats = nla_nest_start(msg,
6719                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6720                         if (!nl_pats)
6721                                 goto nla_put_failure;
6722
6723                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6724                                 nl_pat = nla_nest_start(msg, i + 1);
6725                                 if (!nl_pat)
6726                                         goto nla_put_failure;
6727                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6728                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6729                                             DIV_ROUND_UP(pat_len, 8),
6730                                             rdev->wowlan->patterns[i].mask) ||
6731                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6732                                             pat_len,
6733                                             rdev->wowlan->patterns[i].pattern))
6734                                         goto nla_put_failure;
6735                                 nla_nest_end(msg, nl_pat);
6736                         }
6737                         nla_nest_end(msg, nl_pats);
6738                 }
6739
6740                 nla_nest_end(msg, nl_wowlan);
6741         }
6742
6743         genlmsg_end(msg, hdr);
6744         return genlmsg_reply(msg, info);
6745
6746 nla_put_failure:
6747         nlmsg_free(msg);
6748         return -ENOBUFS;
6749 }
6750
6751 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6752 {
6753         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6754         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6755         struct cfg80211_wowlan new_triggers = {};
6756         struct cfg80211_wowlan *ntrig;
6757         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6758         int err, i;
6759         bool prev_enabled = rdev->wowlan;
6760
6761         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6762                 return -EOPNOTSUPP;
6763
6764         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
6765                 cfg80211_rdev_free_wowlan(rdev);
6766                 rdev->wowlan = NULL;
6767                 goto set_wakeup;
6768         }
6769
6770         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6771                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6772                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6773                         nl80211_wowlan_policy);
6774         if (err)
6775                 return err;
6776
6777         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6778                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6779                         return -EINVAL;
6780                 new_triggers.any = true;
6781         }
6782
6783         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6784                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6785                         return -EINVAL;
6786                 new_triggers.disconnect = true;
6787         }
6788
6789         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6790                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6791                         return -EINVAL;
6792                 new_triggers.magic_pkt = true;
6793         }
6794
6795         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6796                 return -EINVAL;
6797
6798         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6799                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6800                         return -EINVAL;
6801                 new_triggers.gtk_rekey_failure = true;
6802         }
6803
6804         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6805                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6806                         return -EINVAL;
6807                 new_triggers.eap_identity_req = true;
6808         }
6809
6810         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6811                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6812                         return -EINVAL;
6813                 new_triggers.four_way_handshake = true;
6814         }
6815
6816         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6817                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6818                         return -EINVAL;
6819                 new_triggers.rfkill_release = true;
6820         }
6821
6822         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6823                 struct nlattr *pat;
6824                 int n_patterns = 0;
6825                 int rem, pat_len, mask_len;
6826                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6827
6828                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6829                                     rem)
6830                         n_patterns++;
6831                 if (n_patterns > wowlan->n_patterns)
6832                         return -EINVAL;
6833
6834                 new_triggers.patterns = kcalloc(n_patterns,
6835                                                 sizeof(new_triggers.patterns[0]),
6836                                                 GFP_KERNEL);
6837                 if (!new_triggers.patterns)
6838                         return -ENOMEM;
6839
6840                 new_triggers.n_patterns = n_patterns;
6841                 i = 0;
6842
6843                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6844                                     rem) {
6845                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6846                                   nla_data(pat), nla_len(pat), NULL);
6847                         err = -EINVAL;
6848                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6849                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6850                                 goto error;
6851                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6852                         mask_len = DIV_ROUND_UP(pat_len, 8);
6853                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6854                             mask_len)
6855                                 goto error;
6856                         if (pat_len > wowlan->pattern_max_len ||
6857                             pat_len < wowlan->pattern_min_len)
6858                                 goto error;
6859
6860                         new_triggers.patterns[i].mask =
6861                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6862                         if (!new_triggers.patterns[i].mask) {
6863                                 err = -ENOMEM;
6864                                 goto error;
6865                         }
6866                         new_triggers.patterns[i].pattern =
6867                                 new_triggers.patterns[i].mask + mask_len;
6868                         memcpy(new_triggers.patterns[i].mask,
6869                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6870                                mask_len);
6871                         new_triggers.patterns[i].pattern_len = pat_len;
6872                         memcpy(new_triggers.patterns[i].pattern,
6873                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6874                                pat_len);
6875                         i++;
6876                 }
6877         }
6878
6879         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
6880         if (!ntrig) {
6881                 err = -ENOMEM;
6882                 goto error;
6883         }
6884         cfg80211_rdev_free_wowlan(rdev);
6885         rdev->wowlan = ntrig;
6886
6887  set_wakeup:
6888         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6889                 rdev_set_wakeup(rdev, rdev->wowlan);
6890
6891         return 0;
6892  error:
6893         for (i = 0; i < new_triggers.n_patterns; i++)
6894                 kfree(new_triggers.patterns[i].mask);
6895         kfree(new_triggers.patterns);
6896         return err;
6897 }
6898 #endif
6899
6900 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6901 {
6902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6903         struct net_device *dev = info->user_ptr[1];
6904         struct wireless_dev *wdev = dev->ieee80211_ptr;
6905         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6906         struct cfg80211_gtk_rekey_data rekey_data;
6907         int err;
6908
6909         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6910                 return -EINVAL;
6911
6912         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6913                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6914                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6915                         nl80211_rekey_policy);
6916         if (err)
6917                 return err;
6918
6919         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6920                 return -ERANGE;
6921         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6922                 return -ERANGE;
6923         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6924                 return -ERANGE;
6925
6926         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6927                NL80211_KEK_LEN);
6928         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6929                NL80211_KCK_LEN);
6930         memcpy(rekey_data.replay_ctr,
6931                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6932                NL80211_REPLAY_CTR_LEN);
6933
6934         wdev_lock(wdev);
6935         if (!wdev->current_bss) {
6936                 err = -ENOTCONN;
6937                 goto out;
6938         }
6939
6940         if (!rdev->ops->set_rekey_data) {
6941                 err = -EOPNOTSUPP;
6942                 goto out;
6943         }
6944
6945         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
6946  out:
6947         wdev_unlock(wdev);
6948         return err;
6949 }
6950
6951 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6952                                              struct genl_info *info)
6953 {
6954         struct net_device *dev = info->user_ptr[1];
6955         struct wireless_dev *wdev = dev->ieee80211_ptr;
6956
6957         if (wdev->iftype != NL80211_IFTYPE_AP &&
6958             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6959                 return -EINVAL;
6960
6961         if (wdev->ap_unexpected_nlportid)
6962                 return -EBUSY;
6963
6964         wdev->ap_unexpected_nlportid = info->snd_portid;
6965         return 0;
6966 }
6967
6968 static int nl80211_probe_client(struct sk_buff *skb,
6969                                 struct genl_info *info)
6970 {
6971         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6972         struct net_device *dev = info->user_ptr[1];
6973         struct wireless_dev *wdev = dev->ieee80211_ptr;
6974         struct sk_buff *msg;
6975         void *hdr;
6976         const u8 *addr;
6977         u64 cookie;
6978         int err;
6979
6980         if (wdev->iftype != NL80211_IFTYPE_AP &&
6981             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6982                 return -EOPNOTSUPP;
6983
6984         if (!info->attrs[NL80211_ATTR_MAC])
6985                 return -EINVAL;
6986
6987         if (!rdev->ops->probe_client)
6988                 return -EOPNOTSUPP;
6989
6990         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6991         if (!msg)
6992                 return -ENOMEM;
6993
6994         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6995                              NL80211_CMD_PROBE_CLIENT);
6996
6997         if (IS_ERR(hdr)) {
6998                 err = PTR_ERR(hdr);
6999                 goto free_msg;
7000         }
7001
7002         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7003
7004         err = rdev_probe_client(rdev, dev, addr, &cookie);
7005         if (err)
7006                 goto free_msg;
7007
7008         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7009                 goto nla_put_failure;
7010
7011         genlmsg_end(msg, hdr);
7012
7013         return genlmsg_reply(msg, info);
7014
7015  nla_put_failure:
7016         err = -ENOBUFS;
7017  free_msg:
7018         nlmsg_free(msg);
7019         return err;
7020 }
7021
7022 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7023 {
7024         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7025         struct cfg80211_beacon_registration *reg, *nreg;
7026         int rv;
7027
7028         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7029                 return -EOPNOTSUPP;
7030
7031         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7032         if (!nreg)
7033                 return -ENOMEM;
7034
7035         /* First, check if already registered. */
7036         spin_lock_bh(&rdev->beacon_registrations_lock);
7037         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7038                 if (reg->nlportid == info->snd_portid) {
7039                         rv = -EALREADY;
7040                         goto out_err;
7041                 }
7042         }
7043         /* Add it to the list */
7044         nreg->nlportid = info->snd_portid;
7045         list_add(&nreg->list, &rdev->beacon_registrations);
7046
7047         spin_unlock_bh(&rdev->beacon_registrations_lock);
7048
7049         return 0;
7050 out_err:
7051         spin_unlock_bh(&rdev->beacon_registrations_lock);
7052         kfree(nreg);
7053         return rv;
7054 }
7055
7056 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7057 {
7058         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7059         struct wireless_dev *wdev = info->user_ptr[1];
7060         int err;
7061
7062         if (!rdev->ops->start_p2p_device)
7063                 return -EOPNOTSUPP;
7064
7065         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7066                 return -EOPNOTSUPP;
7067
7068         if (wdev->p2p_started)
7069                 return 0;
7070
7071         mutex_lock(&rdev->devlist_mtx);
7072         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7073         mutex_unlock(&rdev->devlist_mtx);
7074         if (err)
7075                 return err;
7076
7077         err = rdev_start_p2p_device(rdev, wdev);
7078         if (err)
7079                 return err;
7080
7081         wdev->p2p_started = true;
7082         mutex_lock(&rdev->devlist_mtx);
7083         rdev->opencount++;
7084         mutex_unlock(&rdev->devlist_mtx);
7085
7086         return 0;
7087 }
7088
7089 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7090 {
7091         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7092         struct wireless_dev *wdev = info->user_ptr[1];
7093
7094         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7095                 return -EOPNOTSUPP;
7096
7097         if (!rdev->ops->stop_p2p_device)
7098                 return -EOPNOTSUPP;
7099
7100         if (!wdev->p2p_started)
7101                 return 0;
7102
7103         rdev_stop_p2p_device(rdev, wdev);
7104         wdev->p2p_started = false;
7105
7106         mutex_lock(&rdev->devlist_mtx);
7107         rdev->opencount--;
7108         mutex_unlock(&rdev->devlist_mtx);
7109
7110         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7111                 rdev->scan_req->aborted = true;
7112                 ___cfg80211_scan_done(rdev, true);
7113         }
7114
7115         return 0;
7116 }
7117
7118 #define NL80211_FLAG_NEED_WIPHY         0x01
7119 #define NL80211_FLAG_NEED_NETDEV        0x02
7120 #define NL80211_FLAG_NEED_RTNL          0x04
7121 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7122 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7123                                          NL80211_FLAG_CHECK_NETDEV_UP)
7124 #define NL80211_FLAG_NEED_WDEV          0x10
7125 /* If a netdev is associated, it must be UP, P2P must be started */
7126 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7127                                          NL80211_FLAG_CHECK_NETDEV_UP)
7128
7129 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7130                             struct genl_info *info)
7131 {
7132         struct cfg80211_registered_device *rdev;
7133         struct wireless_dev *wdev;
7134         struct net_device *dev;
7135         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7136
7137         if (rtnl)
7138                 rtnl_lock();
7139
7140         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7141                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7142                 if (IS_ERR(rdev)) {
7143                         if (rtnl)
7144                                 rtnl_unlock();
7145                         return PTR_ERR(rdev);
7146                 }
7147                 info->user_ptr[0] = rdev;
7148         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7149                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7150                 mutex_lock(&cfg80211_mutex);
7151                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7152                                                   info->attrs);
7153                 if (IS_ERR(wdev)) {
7154                         mutex_unlock(&cfg80211_mutex);
7155                         if (rtnl)
7156                                 rtnl_unlock();
7157                         return PTR_ERR(wdev);
7158                 }
7159
7160                 dev = wdev->netdev;
7161                 rdev = wiphy_to_dev(wdev->wiphy);
7162
7163                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7164                         if (!dev) {
7165                                 mutex_unlock(&cfg80211_mutex);
7166                                 if (rtnl)
7167                                         rtnl_unlock();
7168                                 return -EINVAL;
7169                         }
7170
7171                         info->user_ptr[1] = dev;
7172                 } else {
7173                         info->user_ptr[1] = wdev;
7174                 }
7175
7176                 if (dev) {
7177                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7178                             !netif_running(dev)) {
7179                                 mutex_unlock(&cfg80211_mutex);
7180                                 if (rtnl)
7181                                         rtnl_unlock();
7182                                 return -ENETDOWN;
7183                         }
7184
7185                         dev_hold(dev);
7186                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7187                         if (!wdev->p2p_started) {
7188                                 mutex_unlock(&cfg80211_mutex);
7189                                 if (rtnl)
7190                                         rtnl_unlock();
7191                                 return -ENETDOWN;
7192                         }
7193                 }
7194
7195                 cfg80211_lock_rdev(rdev);
7196
7197                 mutex_unlock(&cfg80211_mutex);
7198
7199                 info->user_ptr[0] = rdev;
7200         }
7201
7202         return 0;
7203 }
7204
7205 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7206                               struct genl_info *info)
7207 {
7208         if (info->user_ptr[0])
7209                 cfg80211_unlock_rdev(info->user_ptr[0]);
7210         if (info->user_ptr[1]) {
7211                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7212                         struct wireless_dev *wdev = info->user_ptr[1];
7213
7214                         if (wdev->netdev)
7215                                 dev_put(wdev->netdev);
7216                 } else {
7217                         dev_put(info->user_ptr[1]);
7218                 }
7219         }
7220         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7221                 rtnl_unlock();
7222 }
7223
7224 static struct genl_ops nl80211_ops[] = {
7225         {
7226                 .cmd = NL80211_CMD_GET_WIPHY,
7227                 .doit = nl80211_get_wiphy,
7228                 .dumpit = nl80211_dump_wiphy,
7229                 .policy = nl80211_policy,
7230                 /* can be retrieved by unprivileged users */
7231                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7232         },
7233         {
7234                 .cmd = NL80211_CMD_SET_WIPHY,
7235                 .doit = nl80211_set_wiphy,
7236                 .policy = nl80211_policy,
7237                 .flags = GENL_ADMIN_PERM,
7238                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7239         },
7240         {
7241                 .cmd = NL80211_CMD_GET_INTERFACE,
7242                 .doit = nl80211_get_interface,
7243                 .dumpit = nl80211_dump_interface,
7244                 .policy = nl80211_policy,
7245                 /* can be retrieved by unprivileged users */
7246                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7247         },
7248         {
7249                 .cmd = NL80211_CMD_SET_INTERFACE,
7250                 .doit = nl80211_set_interface,
7251                 .policy = nl80211_policy,
7252                 .flags = GENL_ADMIN_PERM,
7253                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7254                                   NL80211_FLAG_NEED_RTNL,
7255         },
7256         {
7257                 .cmd = NL80211_CMD_NEW_INTERFACE,
7258                 .doit = nl80211_new_interface,
7259                 .policy = nl80211_policy,
7260                 .flags = GENL_ADMIN_PERM,
7261                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7262                                   NL80211_FLAG_NEED_RTNL,
7263         },
7264         {
7265                 .cmd = NL80211_CMD_DEL_INTERFACE,
7266                 .doit = nl80211_del_interface,
7267                 .policy = nl80211_policy,
7268                 .flags = GENL_ADMIN_PERM,
7269                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7270                                   NL80211_FLAG_NEED_RTNL,
7271         },
7272         {
7273                 .cmd = NL80211_CMD_GET_KEY,
7274                 .doit = nl80211_get_key,
7275                 .policy = nl80211_policy,
7276                 .flags = GENL_ADMIN_PERM,
7277                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7278                                   NL80211_FLAG_NEED_RTNL,
7279         },
7280         {
7281                 .cmd = NL80211_CMD_SET_KEY,
7282                 .doit = nl80211_set_key,
7283                 .policy = nl80211_policy,
7284                 .flags = GENL_ADMIN_PERM,
7285                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7286                                   NL80211_FLAG_NEED_RTNL,
7287         },
7288         {
7289                 .cmd = NL80211_CMD_NEW_KEY,
7290                 .doit = nl80211_new_key,
7291                 .policy = nl80211_policy,
7292                 .flags = GENL_ADMIN_PERM,
7293                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7294                                   NL80211_FLAG_NEED_RTNL,
7295         },
7296         {
7297                 .cmd = NL80211_CMD_DEL_KEY,
7298                 .doit = nl80211_del_key,
7299                 .policy = nl80211_policy,
7300                 .flags = GENL_ADMIN_PERM,
7301                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7302                                   NL80211_FLAG_NEED_RTNL,
7303         },
7304         {
7305                 .cmd = NL80211_CMD_SET_BEACON,
7306                 .policy = nl80211_policy,
7307                 .flags = GENL_ADMIN_PERM,
7308                 .doit = nl80211_set_beacon,
7309                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7310                                   NL80211_FLAG_NEED_RTNL,
7311         },
7312         {
7313                 .cmd = NL80211_CMD_START_AP,
7314                 .policy = nl80211_policy,
7315                 .flags = GENL_ADMIN_PERM,
7316                 .doit = nl80211_start_ap,
7317                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7318                                   NL80211_FLAG_NEED_RTNL,
7319         },
7320         {
7321                 .cmd = NL80211_CMD_STOP_AP,
7322                 .policy = nl80211_policy,
7323                 .flags = GENL_ADMIN_PERM,
7324                 .doit = nl80211_stop_ap,
7325                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7326                                   NL80211_FLAG_NEED_RTNL,
7327         },
7328         {
7329                 .cmd = NL80211_CMD_GET_STATION,
7330                 .doit = nl80211_get_station,
7331                 .dumpit = nl80211_dump_station,
7332                 .policy = nl80211_policy,
7333                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7334                                   NL80211_FLAG_NEED_RTNL,
7335         },
7336         {
7337                 .cmd = NL80211_CMD_SET_STATION,
7338                 .doit = nl80211_set_station,
7339                 .policy = nl80211_policy,
7340                 .flags = GENL_ADMIN_PERM,
7341                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7342                                   NL80211_FLAG_NEED_RTNL,
7343         },
7344         {
7345                 .cmd = NL80211_CMD_NEW_STATION,
7346                 .doit = nl80211_new_station,
7347                 .policy = nl80211_policy,
7348                 .flags = GENL_ADMIN_PERM,
7349                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7350                                   NL80211_FLAG_NEED_RTNL,
7351         },
7352         {
7353                 .cmd = NL80211_CMD_DEL_STATION,
7354                 .doit = nl80211_del_station,
7355                 .policy = nl80211_policy,
7356                 .flags = GENL_ADMIN_PERM,
7357                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7358                                   NL80211_FLAG_NEED_RTNL,
7359         },
7360         {
7361                 .cmd = NL80211_CMD_GET_MPATH,
7362                 .doit = nl80211_get_mpath,
7363                 .dumpit = nl80211_dump_mpath,
7364                 .policy = nl80211_policy,
7365                 .flags = GENL_ADMIN_PERM,
7366                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7367                                   NL80211_FLAG_NEED_RTNL,
7368         },
7369         {
7370                 .cmd = NL80211_CMD_SET_MPATH,
7371                 .doit = nl80211_set_mpath,
7372                 .policy = nl80211_policy,
7373                 .flags = GENL_ADMIN_PERM,
7374                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7375                                   NL80211_FLAG_NEED_RTNL,
7376         },
7377         {
7378                 .cmd = NL80211_CMD_NEW_MPATH,
7379                 .doit = nl80211_new_mpath,
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_DEL_MPATH,
7387                 .doit = nl80211_del_mpath,
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_SET_BSS,
7395                 .doit = nl80211_set_bss,
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_REG,
7403                 .doit = nl80211_get_reg,
7404                 .policy = nl80211_policy,
7405                 /* can be retrieved by unprivileged users */
7406         },
7407         {
7408                 .cmd = NL80211_CMD_SET_REG,
7409                 .doit = nl80211_set_reg,
7410                 .policy = nl80211_policy,
7411                 .flags = GENL_ADMIN_PERM,
7412         },
7413         {
7414                 .cmd = NL80211_CMD_REQ_SET_REG,
7415                 .doit = nl80211_req_set_reg,
7416                 .policy = nl80211_policy,
7417                 .flags = GENL_ADMIN_PERM,
7418         },
7419         {
7420                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7421                 .doit = nl80211_get_mesh_config,
7422                 .policy = nl80211_policy,
7423                 /* can be retrieved by unprivileged users */
7424                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7425                                   NL80211_FLAG_NEED_RTNL,
7426         },
7427         {
7428                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7429                 .doit = nl80211_update_mesh_config,
7430                 .policy = nl80211_policy,
7431                 .flags = GENL_ADMIN_PERM,
7432                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7433                                   NL80211_FLAG_NEED_RTNL,
7434         },
7435         {
7436                 .cmd = NL80211_CMD_TRIGGER_SCAN,
7437                 .doit = nl80211_trigger_scan,
7438                 .policy = nl80211_policy,
7439                 .flags = GENL_ADMIN_PERM,
7440                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7441                                   NL80211_FLAG_NEED_RTNL,
7442         },
7443         {
7444                 .cmd = NL80211_CMD_GET_SCAN,
7445                 .policy = nl80211_policy,
7446                 .dumpit = nl80211_dump_scan,
7447         },
7448         {
7449                 .cmd = NL80211_CMD_START_SCHED_SCAN,
7450                 .doit = nl80211_start_sched_scan,
7451                 .policy = nl80211_policy,
7452                 .flags = GENL_ADMIN_PERM,
7453                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7454                                   NL80211_FLAG_NEED_RTNL,
7455         },
7456         {
7457                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7458                 .doit = nl80211_stop_sched_scan,
7459                 .policy = nl80211_policy,
7460                 .flags = GENL_ADMIN_PERM,
7461                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7462                                   NL80211_FLAG_NEED_RTNL,
7463         },
7464         {
7465                 .cmd = NL80211_CMD_AUTHENTICATE,
7466                 .doit = nl80211_authenticate,
7467                 .policy = nl80211_policy,
7468                 .flags = GENL_ADMIN_PERM,
7469                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7470                                   NL80211_FLAG_NEED_RTNL,
7471         },
7472         {
7473                 .cmd = NL80211_CMD_ASSOCIATE,
7474                 .doit = nl80211_associate,
7475                 .policy = nl80211_policy,
7476                 .flags = GENL_ADMIN_PERM,
7477                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7478                                   NL80211_FLAG_NEED_RTNL,
7479         },
7480         {
7481                 .cmd = NL80211_CMD_DEAUTHENTICATE,
7482                 .doit = nl80211_deauthenticate,
7483                 .policy = nl80211_policy,
7484                 .flags = GENL_ADMIN_PERM,
7485                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7486                                   NL80211_FLAG_NEED_RTNL,
7487         },
7488         {
7489                 .cmd = NL80211_CMD_DISASSOCIATE,
7490                 .doit = nl80211_disassociate,
7491                 .policy = nl80211_policy,
7492                 .flags = GENL_ADMIN_PERM,
7493                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7494                                   NL80211_FLAG_NEED_RTNL,
7495         },
7496         {
7497                 .cmd = NL80211_CMD_JOIN_IBSS,
7498                 .doit = nl80211_join_ibss,
7499                 .policy = nl80211_policy,
7500                 .flags = GENL_ADMIN_PERM,
7501                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7502                                   NL80211_FLAG_NEED_RTNL,
7503         },
7504         {
7505                 .cmd = NL80211_CMD_LEAVE_IBSS,
7506                 .doit = nl80211_leave_ibss,
7507                 .policy = nl80211_policy,
7508                 .flags = GENL_ADMIN_PERM,
7509                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7510                                   NL80211_FLAG_NEED_RTNL,
7511         },
7512 #ifdef CONFIG_NL80211_TESTMODE
7513         {
7514                 .cmd = NL80211_CMD_TESTMODE,
7515                 .doit = nl80211_testmode_do,
7516                 .dumpit = nl80211_testmode_dump,
7517                 .policy = nl80211_policy,
7518                 .flags = GENL_ADMIN_PERM,
7519                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7520                                   NL80211_FLAG_NEED_RTNL,
7521         },
7522 #endif
7523         {
7524                 .cmd = NL80211_CMD_CONNECT,
7525                 .doit = nl80211_connect,
7526                 .policy = nl80211_policy,
7527                 .flags = GENL_ADMIN_PERM,
7528                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7529                                   NL80211_FLAG_NEED_RTNL,
7530         },
7531         {
7532                 .cmd = NL80211_CMD_DISCONNECT,
7533                 .doit = nl80211_disconnect,
7534                 .policy = nl80211_policy,
7535                 .flags = GENL_ADMIN_PERM,
7536                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7537                                   NL80211_FLAG_NEED_RTNL,
7538         },
7539         {
7540                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7541                 .doit = nl80211_wiphy_netns,
7542                 .policy = nl80211_policy,
7543                 .flags = GENL_ADMIN_PERM,
7544                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7545                                   NL80211_FLAG_NEED_RTNL,
7546         },
7547         {
7548                 .cmd = NL80211_CMD_GET_SURVEY,
7549                 .policy = nl80211_policy,
7550                 .dumpit = nl80211_dump_survey,
7551         },
7552         {
7553                 .cmd = NL80211_CMD_SET_PMKSA,
7554                 .doit = nl80211_setdel_pmksa,
7555                 .policy = nl80211_policy,
7556                 .flags = GENL_ADMIN_PERM,
7557                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7558                                   NL80211_FLAG_NEED_RTNL,
7559         },
7560         {
7561                 .cmd = NL80211_CMD_DEL_PMKSA,
7562                 .doit = nl80211_setdel_pmksa,
7563                 .policy = nl80211_policy,
7564                 .flags = GENL_ADMIN_PERM,
7565                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7566                                   NL80211_FLAG_NEED_RTNL,
7567         },
7568         {
7569                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7570                 .doit = nl80211_flush_pmksa,
7571                 .policy = nl80211_policy,
7572                 .flags = GENL_ADMIN_PERM,
7573                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7574                                   NL80211_FLAG_NEED_RTNL,
7575         },
7576         {
7577                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7578                 .doit = nl80211_remain_on_channel,
7579                 .policy = nl80211_policy,
7580                 .flags = GENL_ADMIN_PERM,
7581                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7582                                   NL80211_FLAG_NEED_RTNL,
7583         },
7584         {
7585                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7586                 .doit = nl80211_cancel_remain_on_channel,
7587                 .policy = nl80211_policy,
7588                 .flags = GENL_ADMIN_PERM,
7589                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7590                                   NL80211_FLAG_NEED_RTNL,
7591         },
7592         {
7593                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7594                 .doit = nl80211_set_tx_bitrate_mask,
7595                 .policy = nl80211_policy,
7596                 .flags = GENL_ADMIN_PERM,
7597                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7598                                   NL80211_FLAG_NEED_RTNL,
7599         },
7600         {
7601                 .cmd = NL80211_CMD_REGISTER_FRAME,
7602                 .doit = nl80211_register_mgmt,
7603                 .policy = nl80211_policy,
7604                 .flags = GENL_ADMIN_PERM,
7605                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7606                                   NL80211_FLAG_NEED_RTNL,
7607         },
7608         {
7609                 .cmd = NL80211_CMD_FRAME,
7610                 .doit = nl80211_tx_mgmt,
7611                 .policy = nl80211_policy,
7612                 .flags = GENL_ADMIN_PERM,
7613                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7614                                   NL80211_FLAG_NEED_RTNL,
7615         },
7616         {
7617                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7618                 .doit = nl80211_tx_mgmt_cancel_wait,
7619                 .policy = nl80211_policy,
7620                 .flags = GENL_ADMIN_PERM,
7621                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7622                                   NL80211_FLAG_NEED_RTNL,
7623         },
7624         {
7625                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7626                 .doit = nl80211_set_power_save,
7627                 .policy = nl80211_policy,
7628                 .flags = GENL_ADMIN_PERM,
7629                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7630                                   NL80211_FLAG_NEED_RTNL,
7631         },
7632         {
7633                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7634                 .doit = nl80211_get_power_save,
7635                 .policy = nl80211_policy,
7636                 /* can be retrieved by unprivileged users */
7637                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7638                                   NL80211_FLAG_NEED_RTNL,
7639         },
7640         {
7641                 .cmd = NL80211_CMD_SET_CQM,
7642                 .doit = nl80211_set_cqm,
7643                 .policy = nl80211_policy,
7644                 .flags = GENL_ADMIN_PERM,
7645                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7646                                   NL80211_FLAG_NEED_RTNL,
7647         },
7648         {
7649                 .cmd = NL80211_CMD_SET_CHANNEL,
7650                 .doit = nl80211_set_channel,
7651                 .policy = nl80211_policy,
7652                 .flags = GENL_ADMIN_PERM,
7653                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7654                                   NL80211_FLAG_NEED_RTNL,
7655         },
7656         {
7657                 .cmd = NL80211_CMD_SET_WDS_PEER,
7658                 .doit = nl80211_set_wds_peer,
7659                 .policy = nl80211_policy,
7660                 .flags = GENL_ADMIN_PERM,
7661                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7662                                   NL80211_FLAG_NEED_RTNL,
7663         },
7664         {
7665                 .cmd = NL80211_CMD_JOIN_MESH,
7666                 .doit = nl80211_join_mesh,
7667                 .policy = nl80211_policy,
7668                 .flags = GENL_ADMIN_PERM,
7669                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7670                                   NL80211_FLAG_NEED_RTNL,
7671         },
7672         {
7673                 .cmd = NL80211_CMD_LEAVE_MESH,
7674                 .doit = nl80211_leave_mesh,
7675                 .policy = nl80211_policy,
7676                 .flags = GENL_ADMIN_PERM,
7677                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7678                                   NL80211_FLAG_NEED_RTNL,
7679         },
7680 #ifdef CONFIG_PM
7681         {
7682                 .cmd = NL80211_CMD_GET_WOWLAN,
7683                 .doit = nl80211_get_wowlan,
7684                 .policy = nl80211_policy,
7685                 /* can be retrieved by unprivileged users */
7686                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7687                                   NL80211_FLAG_NEED_RTNL,
7688         },
7689         {
7690                 .cmd = NL80211_CMD_SET_WOWLAN,
7691                 .doit = nl80211_set_wowlan,
7692                 .policy = nl80211_policy,
7693                 .flags = GENL_ADMIN_PERM,
7694                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7695                                   NL80211_FLAG_NEED_RTNL,
7696         },
7697 #endif
7698         {
7699                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7700                 .doit = nl80211_set_rekey_data,
7701                 .policy = nl80211_policy,
7702                 .flags = GENL_ADMIN_PERM,
7703                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7704                                   NL80211_FLAG_NEED_RTNL,
7705         },
7706         {
7707                 .cmd = NL80211_CMD_TDLS_MGMT,
7708                 .doit = nl80211_tdls_mgmt,
7709                 .policy = nl80211_policy,
7710                 .flags = GENL_ADMIN_PERM,
7711                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7712                                   NL80211_FLAG_NEED_RTNL,
7713         },
7714         {
7715                 .cmd = NL80211_CMD_TDLS_OPER,
7716                 .doit = nl80211_tdls_oper,
7717                 .policy = nl80211_policy,
7718                 .flags = GENL_ADMIN_PERM,
7719                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7720                                   NL80211_FLAG_NEED_RTNL,
7721         },
7722         {
7723                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7724                 .doit = nl80211_register_unexpected_frame,
7725                 .policy = nl80211_policy,
7726                 .flags = GENL_ADMIN_PERM,
7727                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7728                                   NL80211_FLAG_NEED_RTNL,
7729         },
7730         {
7731                 .cmd = NL80211_CMD_PROBE_CLIENT,
7732                 .doit = nl80211_probe_client,
7733                 .policy = nl80211_policy,
7734                 .flags = GENL_ADMIN_PERM,
7735                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7736                                   NL80211_FLAG_NEED_RTNL,
7737         },
7738         {
7739                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7740                 .doit = nl80211_register_beacons,
7741                 .policy = nl80211_policy,
7742                 .flags = GENL_ADMIN_PERM,
7743                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7744                                   NL80211_FLAG_NEED_RTNL,
7745         },
7746         {
7747                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7748                 .doit = nl80211_set_noack_map,
7749                 .policy = nl80211_policy,
7750                 .flags = GENL_ADMIN_PERM,
7751                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7752                                   NL80211_FLAG_NEED_RTNL,
7753         },
7754         {
7755                 .cmd = NL80211_CMD_START_P2P_DEVICE,
7756                 .doit = nl80211_start_p2p_device,
7757                 .policy = nl80211_policy,
7758                 .flags = GENL_ADMIN_PERM,
7759                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7760                                   NL80211_FLAG_NEED_RTNL,
7761         },
7762         {
7763                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
7764                 .doit = nl80211_stop_p2p_device,
7765                 .policy = nl80211_policy,
7766                 .flags = GENL_ADMIN_PERM,
7767                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7768                                   NL80211_FLAG_NEED_RTNL,
7769         },
7770         {
7771                 .cmd = NL80211_CMD_SET_MCAST_RATE,
7772                 .doit = nl80211_set_mcast_rate,
7773                 .policy = nl80211_policy,
7774                 .flags = GENL_ADMIN_PERM,
7775                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7776                                   NL80211_FLAG_NEED_RTNL,
7777         },
7778 };
7779
7780 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7781         .name = "mlme",
7782 };
7783
7784 /* multicast groups */
7785 static struct genl_multicast_group nl80211_config_mcgrp = {
7786         .name = "config",
7787 };
7788 static struct genl_multicast_group nl80211_scan_mcgrp = {
7789         .name = "scan",
7790 };
7791 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7792         .name = "regulatory",
7793 };
7794
7795 /* notification functions */
7796
7797 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7798 {
7799         struct sk_buff *msg;
7800
7801         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7802         if (!msg)
7803                 return;
7804
7805         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7806                 nlmsg_free(msg);
7807                 return;
7808         }
7809
7810         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7811                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7812 }
7813
7814 static int nl80211_add_scan_req(struct sk_buff *msg,
7815                                 struct cfg80211_registered_device *rdev)
7816 {
7817         struct cfg80211_scan_request *req = rdev->scan_req;
7818         struct nlattr *nest;
7819         int i;
7820
7821         ASSERT_RDEV_LOCK(rdev);
7822
7823         if (WARN_ON(!req))
7824                 return 0;
7825
7826         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7827         if (!nest)
7828                 goto nla_put_failure;
7829         for (i = 0; i < req->n_ssids; i++) {
7830                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7831                         goto nla_put_failure;
7832         }
7833         nla_nest_end(msg, nest);
7834
7835         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7836         if (!nest)
7837                 goto nla_put_failure;
7838         for (i = 0; i < req->n_channels; i++) {
7839                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7840                         goto nla_put_failure;
7841         }
7842         nla_nest_end(msg, nest);
7843
7844         if (req->ie &&
7845             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7846                 goto nla_put_failure;
7847
7848         if (req->flags)
7849                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
7850
7851         return 0;
7852  nla_put_failure:
7853         return -ENOBUFS;
7854 }
7855
7856 static int nl80211_send_scan_msg(struct sk_buff *msg,
7857                                  struct cfg80211_registered_device *rdev,
7858                                  struct wireless_dev *wdev,
7859                                  u32 portid, u32 seq, int flags,
7860                                  u32 cmd)
7861 {
7862         void *hdr;
7863
7864         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7865         if (!hdr)
7866                 return -1;
7867
7868         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7869             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
7870                                          wdev->netdev->ifindex)) ||
7871             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
7872                 goto nla_put_failure;
7873
7874         /* ignore errors and send incomplete event anyway */
7875         nl80211_add_scan_req(msg, rdev);
7876
7877         return genlmsg_end(msg, hdr);
7878
7879  nla_put_failure:
7880         genlmsg_cancel(msg, hdr);
7881         return -EMSGSIZE;
7882 }
7883
7884 static int
7885 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7886                             struct cfg80211_registered_device *rdev,
7887                             struct net_device *netdev,
7888                             u32 portid, u32 seq, int flags, u32 cmd)
7889 {
7890         void *hdr;
7891
7892         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7893         if (!hdr)
7894                 return -1;
7895
7896         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7897             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7898                 goto nla_put_failure;
7899
7900         return genlmsg_end(msg, hdr);
7901
7902  nla_put_failure:
7903         genlmsg_cancel(msg, hdr);
7904         return -EMSGSIZE;
7905 }
7906
7907 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7908                              struct wireless_dev *wdev)
7909 {
7910         struct sk_buff *msg;
7911
7912         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7913         if (!msg)
7914                 return;
7915
7916         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7917                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7918                 nlmsg_free(msg);
7919                 return;
7920         }
7921
7922         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7923                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7924 }
7925
7926 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7927                             struct wireless_dev *wdev)
7928 {
7929         struct sk_buff *msg;
7930
7931         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7932         if (!msg)
7933                 return;
7934
7935         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7936                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7937                 nlmsg_free(msg);
7938                 return;
7939         }
7940
7941         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7942                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7943 }
7944
7945 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7946                                struct wireless_dev *wdev)
7947 {
7948         struct sk_buff *msg;
7949
7950         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7951         if (!msg)
7952                 return;
7953
7954         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7955                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7956                 nlmsg_free(msg);
7957                 return;
7958         }
7959
7960         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7961                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7962 }
7963
7964 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7965                                      struct net_device *netdev)
7966 {
7967         struct sk_buff *msg;
7968
7969         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7970         if (!msg)
7971                 return;
7972
7973         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7974                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7975                 nlmsg_free(msg);
7976                 return;
7977         }
7978
7979         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7980                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7981 }
7982
7983 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7984                              struct net_device *netdev, u32 cmd)
7985 {
7986         struct sk_buff *msg;
7987
7988         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7989         if (!msg)
7990                 return;
7991
7992         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7993                 nlmsg_free(msg);
7994                 return;
7995         }
7996
7997         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7998                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7999 }
8000
8001 /*
8002  * This can happen on global regulatory changes or device specific settings
8003  * based on custom world regulatory domains.
8004  */
8005 void nl80211_send_reg_change_event(struct regulatory_request *request)
8006 {
8007         struct sk_buff *msg;
8008         void *hdr;
8009
8010         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8011         if (!msg)
8012                 return;
8013
8014         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8015         if (!hdr) {
8016                 nlmsg_free(msg);
8017                 return;
8018         }
8019
8020         /* Userspace can always count this one always being set */
8021         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8022                 goto nla_put_failure;
8023
8024         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8025                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8026                                NL80211_REGDOM_TYPE_WORLD))
8027                         goto nla_put_failure;
8028         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8029                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8030                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8031                         goto nla_put_failure;
8032         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8033                    request->intersect) {
8034                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8035                                NL80211_REGDOM_TYPE_INTERSECTION))
8036                         goto nla_put_failure;
8037         } else {
8038                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8039                                NL80211_REGDOM_TYPE_COUNTRY) ||
8040                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8041                                    request->alpha2))
8042                         goto nla_put_failure;
8043         }
8044
8045         if (wiphy_idx_valid(request->wiphy_idx) &&
8046             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8047                 goto nla_put_failure;
8048
8049         genlmsg_end(msg, hdr);
8050
8051         rcu_read_lock();
8052         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8053                                 GFP_ATOMIC);
8054         rcu_read_unlock();
8055
8056         return;
8057
8058 nla_put_failure:
8059         genlmsg_cancel(msg, hdr);
8060         nlmsg_free(msg);
8061 }
8062
8063 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8064                                     struct net_device *netdev,
8065                                     const u8 *buf, size_t len,
8066                                     enum nl80211_commands cmd, gfp_t gfp)
8067 {
8068         struct sk_buff *msg;
8069         void *hdr;
8070
8071         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8072         if (!msg)
8073                 return;
8074
8075         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8076         if (!hdr) {
8077                 nlmsg_free(msg);
8078                 return;
8079         }
8080
8081         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8082             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8083             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8084                 goto nla_put_failure;
8085
8086         genlmsg_end(msg, hdr);
8087
8088         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8089                                 nl80211_mlme_mcgrp.id, gfp);
8090         return;
8091
8092  nla_put_failure:
8093         genlmsg_cancel(msg, hdr);
8094         nlmsg_free(msg);
8095 }
8096
8097 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8098                           struct net_device *netdev, const u8 *buf,
8099                           size_t len, gfp_t gfp)
8100 {
8101         nl80211_send_mlme_event(rdev, netdev, buf, len,
8102                                 NL80211_CMD_AUTHENTICATE, gfp);
8103 }
8104
8105 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8106                            struct net_device *netdev, const u8 *buf,
8107                            size_t len, gfp_t gfp)
8108 {
8109         nl80211_send_mlme_event(rdev, netdev, buf, len,
8110                                 NL80211_CMD_ASSOCIATE, gfp);
8111 }
8112
8113 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8114                          struct net_device *netdev, const u8 *buf,
8115                          size_t len, gfp_t gfp)
8116 {
8117         nl80211_send_mlme_event(rdev, netdev, buf, len,
8118                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8119 }
8120
8121 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8122                            struct net_device *netdev, const u8 *buf,
8123                            size_t len, gfp_t gfp)
8124 {
8125         nl80211_send_mlme_event(rdev, netdev, buf, len,
8126                                 NL80211_CMD_DISASSOCIATE, gfp);
8127 }
8128
8129 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8130                                 struct net_device *netdev, const u8 *buf,
8131                                 size_t len, gfp_t gfp)
8132 {
8133         nl80211_send_mlme_event(rdev, netdev, buf, len,
8134                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8135 }
8136
8137 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8138                                   struct net_device *netdev, const u8 *buf,
8139                                   size_t len, gfp_t gfp)
8140 {
8141         nl80211_send_mlme_event(rdev, netdev, buf, len,
8142                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8143 }
8144
8145 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8146                                       struct net_device *netdev, int cmd,
8147                                       const u8 *addr, gfp_t gfp)
8148 {
8149         struct sk_buff *msg;
8150         void *hdr;
8151
8152         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8153         if (!msg)
8154                 return;
8155
8156         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8157         if (!hdr) {
8158                 nlmsg_free(msg);
8159                 return;
8160         }
8161
8162         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8163             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8164             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8165             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8166                 goto nla_put_failure;
8167
8168         genlmsg_end(msg, hdr);
8169
8170         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8171                                 nl80211_mlme_mcgrp.id, gfp);
8172         return;
8173
8174  nla_put_failure:
8175         genlmsg_cancel(msg, hdr);
8176         nlmsg_free(msg);
8177 }
8178
8179 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8180                                struct net_device *netdev, const u8 *addr,
8181                                gfp_t gfp)
8182 {
8183         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8184                                   addr, gfp);
8185 }
8186
8187 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8188                                 struct net_device *netdev, const u8 *addr,
8189                                 gfp_t gfp)
8190 {
8191         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8192                                   addr, gfp);
8193 }
8194
8195 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8196                                  struct net_device *netdev, const u8 *bssid,
8197                                  const u8 *req_ie, size_t req_ie_len,
8198                                  const u8 *resp_ie, size_t resp_ie_len,
8199                                  u16 status, gfp_t gfp)
8200 {
8201         struct sk_buff *msg;
8202         void *hdr;
8203
8204         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8205         if (!msg)
8206                 return;
8207
8208         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8209         if (!hdr) {
8210                 nlmsg_free(msg);
8211                 return;
8212         }
8213
8214         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8215             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8216             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8217             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8218             (req_ie &&
8219              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8220             (resp_ie &&
8221              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8222                 goto nla_put_failure;
8223
8224         genlmsg_end(msg, hdr);
8225
8226         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8227                                 nl80211_mlme_mcgrp.id, gfp);
8228         return;
8229
8230  nla_put_failure:
8231         genlmsg_cancel(msg, hdr);
8232         nlmsg_free(msg);
8233
8234 }
8235
8236 void nl80211_send_roamed(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, gfp_t gfp)
8240 {
8241         struct sk_buff *msg;
8242         void *hdr;
8243
8244         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8245         if (!msg)
8246                 return;
8247
8248         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8249         if (!hdr) {
8250                 nlmsg_free(msg);
8251                 return;
8252         }
8253
8254         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8255             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8256             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8257             (req_ie &&
8258              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8259             (resp_ie &&
8260              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8261                 goto nla_put_failure;
8262
8263         genlmsg_end(msg, hdr);
8264
8265         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8266                                 nl80211_mlme_mcgrp.id, gfp);
8267         return;
8268
8269  nla_put_failure:
8270         genlmsg_cancel(msg, hdr);
8271         nlmsg_free(msg);
8272
8273 }
8274
8275 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8276                                struct net_device *netdev, u16 reason,
8277                                const u8 *ie, size_t ie_len, bool from_ap)
8278 {
8279         struct sk_buff *msg;
8280         void *hdr;
8281
8282         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8283         if (!msg)
8284                 return;
8285
8286         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8287         if (!hdr) {
8288                 nlmsg_free(msg);
8289                 return;
8290         }
8291
8292         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8293             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8294             (from_ap && reason &&
8295              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8296             (from_ap &&
8297              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8298             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8299                 goto nla_put_failure;
8300
8301         genlmsg_end(msg, hdr);
8302
8303         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8304                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8305         return;
8306
8307  nla_put_failure:
8308         genlmsg_cancel(msg, hdr);
8309         nlmsg_free(msg);
8310
8311 }
8312
8313 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8314                              struct net_device *netdev, const u8 *bssid,
8315                              gfp_t gfp)
8316 {
8317         struct sk_buff *msg;
8318         void *hdr;
8319
8320         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8321         if (!msg)
8322                 return;
8323
8324         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8325         if (!hdr) {
8326                 nlmsg_free(msg);
8327                 return;
8328         }
8329
8330         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8331             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8332             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8333                 goto nla_put_failure;
8334
8335         genlmsg_end(msg, hdr);
8336
8337         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8338                                 nl80211_mlme_mcgrp.id, gfp);
8339         return;
8340
8341  nla_put_failure:
8342         genlmsg_cancel(msg, hdr);
8343         nlmsg_free(msg);
8344 }
8345
8346 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
8347                 struct net_device *netdev,
8348                 const u8 *macaddr, const u8* ie, u8 ie_len,
8349                 gfp_t gfp)
8350 {
8351         struct sk_buff *msg;
8352         void *hdr;
8353
8354         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8355         if (!msg)
8356                 return;
8357
8358         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
8359         if (!hdr) {
8360                 nlmsg_free(msg);
8361                 return;
8362         }
8363
8364         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8365             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8366             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
8367             (ie_len && ie &&
8368              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
8369                 goto nla_put_failure;
8370
8371         genlmsg_end(msg, hdr);
8372
8373         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8374                                 nl80211_mlme_mcgrp.id, gfp);
8375         return;
8376
8377  nla_put_failure:
8378         genlmsg_cancel(msg, hdr);
8379         nlmsg_free(msg);
8380 }
8381
8382 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
8383                                  struct net_device *netdev, const u8 *addr,
8384                                  enum nl80211_key_type key_type, int key_id,
8385                                  const u8 *tsc, gfp_t gfp)
8386 {
8387         struct sk_buff *msg;
8388         void *hdr;
8389
8390         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8391         if (!msg)
8392                 return;
8393
8394         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
8395         if (!hdr) {
8396                 nlmsg_free(msg);
8397                 return;
8398         }
8399
8400         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8401             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8402             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
8403             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
8404             (key_id != -1 &&
8405              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
8406             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
8407                 goto nla_put_failure;
8408
8409         genlmsg_end(msg, hdr);
8410
8411         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8412                                 nl80211_mlme_mcgrp.id, gfp);
8413         return;
8414
8415  nla_put_failure:
8416         genlmsg_cancel(msg, hdr);
8417         nlmsg_free(msg);
8418 }
8419
8420 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8421                                     struct ieee80211_channel *channel_before,
8422                                     struct ieee80211_channel *channel_after)
8423 {
8424         struct sk_buff *msg;
8425         void *hdr;
8426         struct nlattr *nl_freq;
8427
8428         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8429         if (!msg)
8430                 return;
8431
8432         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8433         if (!hdr) {
8434                 nlmsg_free(msg);
8435                 return;
8436         }
8437
8438         /*
8439          * Since we are applying the beacon hint to a wiphy we know its
8440          * wiphy_idx is valid
8441          */
8442         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8443                 goto nla_put_failure;
8444
8445         /* Before */
8446         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8447         if (!nl_freq)
8448                 goto nla_put_failure;
8449         if (nl80211_msg_put_channel(msg, channel_before))
8450                 goto nla_put_failure;
8451         nla_nest_end(msg, nl_freq);
8452
8453         /* After */
8454         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8455         if (!nl_freq)
8456                 goto nla_put_failure;
8457         if (nl80211_msg_put_channel(msg, channel_after))
8458                 goto nla_put_failure;
8459         nla_nest_end(msg, nl_freq);
8460
8461         genlmsg_end(msg, hdr);
8462
8463         rcu_read_lock();
8464         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8465                                 GFP_ATOMIC);
8466         rcu_read_unlock();
8467
8468         return;
8469
8470 nla_put_failure:
8471         genlmsg_cancel(msg, hdr);
8472         nlmsg_free(msg);
8473 }
8474
8475 static void nl80211_send_remain_on_chan_event(
8476         int cmd, struct cfg80211_registered_device *rdev,
8477         struct wireless_dev *wdev, u64 cookie,
8478         struct ieee80211_channel *chan,
8479         unsigned int duration, gfp_t gfp)
8480 {
8481         struct sk_buff *msg;
8482         void *hdr;
8483
8484         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8485         if (!msg)
8486                 return;
8487
8488         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8489         if (!hdr) {
8490                 nlmsg_free(msg);
8491                 return;
8492         }
8493
8494         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8495             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8496                                          wdev->netdev->ifindex)) ||
8497             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8498             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8499             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
8500                         NL80211_CHAN_NO_HT) ||
8501             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8502                 goto nla_put_failure;
8503
8504         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8505             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8506                 goto nla_put_failure;
8507
8508         genlmsg_end(msg, hdr);
8509
8510         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8511                                 nl80211_mlme_mcgrp.id, gfp);
8512         return;
8513
8514  nla_put_failure:
8515         genlmsg_cancel(msg, hdr);
8516         nlmsg_free(msg);
8517 }
8518
8519 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8520                                     struct wireless_dev *wdev, u64 cookie,
8521                                     struct ieee80211_channel *chan,
8522                                     unsigned int duration, gfp_t gfp)
8523 {
8524         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8525                                           rdev, wdev, cookie, chan,
8526                                           duration, gfp);
8527 }
8528
8529 void nl80211_send_remain_on_channel_cancel(
8530         struct cfg80211_registered_device *rdev,
8531         struct wireless_dev *wdev,
8532         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
8533 {
8534         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8535                                           rdev, wdev, cookie, chan, 0, gfp);
8536 }
8537
8538 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8539                             struct net_device *dev, const u8 *mac_addr,
8540                             struct station_info *sinfo, gfp_t gfp)
8541 {
8542         struct sk_buff *msg;
8543
8544         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8545         if (!msg)
8546                 return;
8547
8548         if (nl80211_send_station(msg, 0, 0, 0,
8549                                  rdev, dev, mac_addr, sinfo) < 0) {
8550                 nlmsg_free(msg);
8551                 return;
8552         }
8553
8554         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8555                                 nl80211_mlme_mcgrp.id, gfp);
8556 }
8557
8558 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8559                                 struct net_device *dev, const u8 *mac_addr,
8560                                 gfp_t gfp)
8561 {
8562         struct sk_buff *msg;
8563         void *hdr;
8564
8565         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8566         if (!msg)
8567                 return;
8568
8569         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8570         if (!hdr) {
8571                 nlmsg_free(msg);
8572                 return;
8573         }
8574
8575         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8576             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8577                 goto nla_put_failure;
8578
8579         genlmsg_end(msg, hdr);
8580
8581         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8582                                 nl80211_mlme_mcgrp.id, gfp);
8583         return;
8584
8585  nla_put_failure:
8586         genlmsg_cancel(msg, hdr);
8587         nlmsg_free(msg);
8588 }
8589
8590 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
8591                                     struct net_device *dev, const u8 *mac_addr,
8592                                     enum nl80211_connect_failed_reason reason,
8593                                     gfp_t gfp)
8594 {
8595         struct sk_buff *msg;
8596         void *hdr;
8597
8598         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8599         if (!msg)
8600                 return;
8601
8602         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
8603         if (!hdr) {
8604                 nlmsg_free(msg);
8605                 return;
8606         }
8607
8608         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8609             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
8610             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
8611                 goto nla_put_failure;
8612
8613         genlmsg_end(msg, hdr);
8614
8615         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8616                                 nl80211_mlme_mcgrp.id, gfp);
8617         return;
8618
8619  nla_put_failure:
8620         genlmsg_cancel(msg, hdr);
8621         nlmsg_free(msg);
8622 }
8623
8624 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8625                                        const u8 *addr, gfp_t gfp)
8626 {
8627         struct wireless_dev *wdev = dev->ieee80211_ptr;
8628         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8629         struct sk_buff *msg;
8630         void *hdr;
8631         int err;
8632         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
8633
8634         if (!nlportid)
8635                 return false;
8636
8637         msg = nlmsg_new(100, gfp);
8638         if (!msg)
8639                 return true;
8640
8641         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8642         if (!hdr) {
8643                 nlmsg_free(msg);
8644                 return true;
8645         }
8646
8647         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8648             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8649             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8650                 goto nla_put_failure;
8651
8652         err = genlmsg_end(msg, hdr);
8653         if (err < 0) {
8654                 nlmsg_free(msg);
8655                 return true;
8656         }
8657
8658         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8659         return true;
8660
8661  nla_put_failure:
8662         genlmsg_cancel(msg, hdr);
8663         nlmsg_free(msg);
8664         return true;
8665 }
8666
8667 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8668 {
8669         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8670                                           addr, gfp);
8671 }
8672
8673 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8674                                     const u8 *addr, gfp_t gfp)
8675 {
8676         return __nl80211_unexpected_frame(dev,
8677                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8678                                           addr, gfp);
8679 }
8680
8681 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8682                       struct wireless_dev *wdev, u32 nlportid,
8683                       int freq, int sig_dbm,
8684                       const u8 *buf, size_t len, gfp_t gfp)
8685 {
8686         struct net_device *netdev = wdev->netdev;
8687         struct sk_buff *msg;
8688         void *hdr;
8689
8690         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8691         if (!msg)
8692                 return -ENOMEM;
8693
8694         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8695         if (!hdr) {
8696                 nlmsg_free(msg);
8697                 return -ENOMEM;
8698         }
8699
8700         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8701             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8702                                         netdev->ifindex)) ||
8703             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8704             (sig_dbm &&
8705              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8706             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8707                 goto nla_put_failure;
8708
8709         genlmsg_end(msg, hdr);
8710
8711         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8712
8713  nla_put_failure:
8714         genlmsg_cancel(msg, hdr);
8715         nlmsg_free(msg);
8716         return -ENOBUFS;
8717 }
8718
8719 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8720                                  struct wireless_dev *wdev, u64 cookie,
8721                                  const u8 *buf, size_t len, bool ack,
8722                                  gfp_t gfp)
8723 {
8724         struct net_device *netdev = wdev->netdev;
8725         struct sk_buff *msg;
8726         void *hdr;
8727
8728         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8729         if (!msg)
8730                 return;
8731
8732         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8733         if (!hdr) {
8734                 nlmsg_free(msg);
8735                 return;
8736         }
8737
8738         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8739             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8740                                    netdev->ifindex)) ||
8741             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8742             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8743             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8744                 goto nla_put_failure;
8745
8746         genlmsg_end(msg, hdr);
8747
8748         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8749         return;
8750
8751  nla_put_failure:
8752         genlmsg_cancel(msg, hdr);
8753         nlmsg_free(msg);
8754 }
8755
8756 void
8757 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8758                              struct net_device *netdev,
8759                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8760                              gfp_t gfp)
8761 {
8762         struct sk_buff *msg;
8763         struct nlattr *pinfoattr;
8764         void *hdr;
8765
8766         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8767         if (!msg)
8768                 return;
8769
8770         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8771         if (!hdr) {
8772                 nlmsg_free(msg);
8773                 return;
8774         }
8775
8776         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8777             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8778                 goto nla_put_failure;
8779
8780         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8781         if (!pinfoattr)
8782                 goto nla_put_failure;
8783
8784         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8785                         rssi_event))
8786                 goto nla_put_failure;
8787
8788         nla_nest_end(msg, pinfoattr);
8789
8790         genlmsg_end(msg, hdr);
8791
8792         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8793                                 nl80211_mlme_mcgrp.id, gfp);
8794         return;
8795
8796  nla_put_failure:
8797         genlmsg_cancel(msg, hdr);
8798         nlmsg_free(msg);
8799 }
8800
8801 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8802                               struct net_device *netdev, const u8 *bssid,
8803                               const u8 *replay_ctr, gfp_t gfp)
8804 {
8805         struct sk_buff *msg;
8806         struct nlattr *rekey_attr;
8807         void *hdr;
8808
8809         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8810         if (!msg)
8811                 return;
8812
8813         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8814         if (!hdr) {
8815                 nlmsg_free(msg);
8816                 return;
8817         }
8818
8819         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8820             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8821             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8822                 goto nla_put_failure;
8823
8824         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8825         if (!rekey_attr)
8826                 goto nla_put_failure;
8827
8828         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8829                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8830                 goto nla_put_failure;
8831
8832         nla_nest_end(msg, rekey_attr);
8833
8834         genlmsg_end(msg, hdr);
8835
8836         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8837                                 nl80211_mlme_mcgrp.id, gfp);
8838         return;
8839
8840  nla_put_failure:
8841         genlmsg_cancel(msg, hdr);
8842         nlmsg_free(msg);
8843 }
8844
8845 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8846                                     struct net_device *netdev, int index,
8847                                     const u8 *bssid, bool preauth, gfp_t gfp)
8848 {
8849         struct sk_buff *msg;
8850         struct nlattr *attr;
8851         void *hdr;
8852
8853         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8854         if (!msg)
8855                 return;
8856
8857         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8858         if (!hdr) {
8859                 nlmsg_free(msg);
8860                 return;
8861         }
8862
8863         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8864             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8865                 goto nla_put_failure;
8866
8867         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8868         if (!attr)
8869                 goto nla_put_failure;
8870
8871         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8872             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8873             (preauth &&
8874              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8875                 goto nla_put_failure;
8876
8877         nla_nest_end(msg, attr);
8878
8879         genlmsg_end(msg, hdr);
8880
8881         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8882                                 nl80211_mlme_mcgrp.id, gfp);
8883         return;
8884
8885  nla_put_failure:
8886         genlmsg_cancel(msg, hdr);
8887         nlmsg_free(msg);
8888 }
8889
8890 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8891                               struct net_device *netdev,
8892                               struct cfg80211_chan_def *chandef, gfp_t gfp)
8893 {
8894         struct sk_buff *msg;
8895         void *hdr;
8896
8897         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8898         if (!msg)
8899                 return;
8900
8901         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8902         if (!hdr) {
8903                 nlmsg_free(msg);
8904                 return;
8905         }
8906
8907         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8908                 goto nla_put_failure;
8909
8910         if (nl80211_send_chandef(msg, chandef))
8911                 goto nla_put_failure;
8912
8913         genlmsg_end(msg, hdr);
8914
8915         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8916                                 nl80211_mlme_mcgrp.id, gfp);
8917         return;
8918
8919  nla_put_failure:
8920         genlmsg_cancel(msg, hdr);
8921         nlmsg_free(msg);
8922 }
8923
8924 void
8925 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
8926                             struct net_device *netdev, const u8 *peer,
8927                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
8928 {
8929         struct sk_buff *msg;
8930         struct nlattr *pinfoattr;
8931         void *hdr;
8932
8933         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8934         if (!msg)
8935                 return;
8936
8937         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8938         if (!hdr) {
8939                 nlmsg_free(msg);
8940                 return;
8941         }
8942
8943         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8944             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8945             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8946                 goto nla_put_failure;
8947
8948         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8949         if (!pinfoattr)
8950                 goto nla_put_failure;
8951
8952         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
8953                 goto nla_put_failure;
8954
8955         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
8956                 goto nla_put_failure;
8957
8958         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
8959                 goto nla_put_failure;
8960
8961         nla_nest_end(msg, pinfoattr);
8962
8963         genlmsg_end(msg, hdr);
8964
8965         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8966                                 nl80211_mlme_mcgrp.id, gfp);
8967         return;
8968
8969  nla_put_failure:
8970         genlmsg_cancel(msg, hdr);
8971         nlmsg_free(msg);
8972 }
8973
8974 void
8975 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8976                                 struct net_device *netdev, const u8 *peer,
8977                                 u32 num_packets, gfp_t gfp)
8978 {
8979         struct sk_buff *msg;
8980         struct nlattr *pinfoattr;
8981         void *hdr;
8982
8983         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8984         if (!msg)
8985                 return;
8986
8987         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8988         if (!hdr) {
8989                 nlmsg_free(msg);
8990                 return;
8991         }
8992
8993         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8994             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8995             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8996                 goto nla_put_failure;
8997
8998         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8999         if (!pinfoattr)
9000                 goto nla_put_failure;
9001
9002         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9003                 goto nla_put_failure;
9004
9005         nla_nest_end(msg, pinfoattr);
9006
9007         genlmsg_end(msg, hdr);
9008
9009         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9010                                 nl80211_mlme_mcgrp.id, gfp);
9011         return;
9012
9013  nla_put_failure:
9014         genlmsg_cancel(msg, hdr);
9015         nlmsg_free(msg);
9016 }
9017
9018 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9019                            u64 cookie, bool acked, gfp_t gfp)
9020 {
9021         struct wireless_dev *wdev = dev->ieee80211_ptr;
9022         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9023         struct sk_buff *msg;
9024         void *hdr;
9025         int err;
9026
9027         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9028
9029         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9030
9031         if (!msg)
9032                 return;
9033
9034         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9035         if (!hdr) {
9036                 nlmsg_free(msg);
9037                 return;
9038         }
9039
9040         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9041             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9042             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9043             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9044             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9045                 goto nla_put_failure;
9046
9047         err = genlmsg_end(msg, hdr);
9048         if (err < 0) {
9049                 nlmsg_free(msg);
9050                 return;
9051         }
9052
9053         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9054                                 nl80211_mlme_mcgrp.id, gfp);
9055         return;
9056
9057  nla_put_failure:
9058         genlmsg_cancel(msg, hdr);
9059         nlmsg_free(msg);
9060 }
9061 EXPORT_SYMBOL(cfg80211_probe_status);
9062
9063 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9064                                  const u8 *frame, size_t len,
9065                                  int freq, int sig_dbm)
9066 {
9067         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9068         struct sk_buff *msg;
9069         void *hdr;
9070         struct cfg80211_beacon_registration *reg;
9071
9072         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9073
9074         spin_lock_bh(&rdev->beacon_registrations_lock);
9075         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9076                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9077                 if (!msg) {
9078                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9079                         return;
9080                 }
9081
9082                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9083                 if (!hdr)
9084                         goto nla_put_failure;
9085
9086                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9087                     (freq &&
9088                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9089                     (sig_dbm &&
9090                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9091                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9092                         goto nla_put_failure;
9093
9094                 genlmsg_end(msg, hdr);
9095
9096                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9097         }
9098         spin_unlock_bh(&rdev->beacon_registrations_lock);
9099         return;
9100
9101  nla_put_failure:
9102         spin_unlock_bh(&rdev->beacon_registrations_lock);
9103         if (hdr)
9104                 genlmsg_cancel(msg, hdr);
9105         nlmsg_free(msg);
9106 }
9107 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9108
9109 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9110                                 enum nl80211_tdls_operation oper,
9111                                 u16 reason_code, gfp_t gfp)
9112 {
9113         struct wireless_dev *wdev = dev->ieee80211_ptr;
9114         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9115         struct sk_buff *msg;
9116         void *hdr;
9117         int err;
9118
9119         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9120                                          reason_code);
9121
9122         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9123         if (!msg)
9124                 return;
9125
9126         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9127         if (!hdr) {
9128                 nlmsg_free(msg);
9129                 return;
9130         }
9131
9132         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9133             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9134             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9135             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9136             (reason_code > 0 &&
9137              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9138                 goto nla_put_failure;
9139
9140         err = genlmsg_end(msg, hdr);
9141         if (err < 0) {
9142                 nlmsg_free(msg);
9143                 return;
9144         }
9145
9146         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9147                                 nl80211_mlme_mcgrp.id, gfp);
9148         return;
9149
9150  nla_put_failure:
9151         genlmsg_cancel(msg, hdr);
9152         nlmsg_free(msg);
9153 }
9154 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9155
9156 static int nl80211_netlink_notify(struct notifier_block * nb,
9157                                   unsigned long state,
9158                                   void *_notify)
9159 {
9160         struct netlink_notify *notify = _notify;
9161         struct cfg80211_registered_device *rdev;
9162         struct wireless_dev *wdev;
9163         struct cfg80211_beacon_registration *reg, *tmp;
9164
9165         if (state != NETLINK_URELEASE)
9166                 return NOTIFY_DONE;
9167
9168         rcu_read_lock();
9169
9170         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9171                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9172                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
9173
9174                 spin_lock_bh(&rdev->beacon_registrations_lock);
9175                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
9176                                          list) {
9177                         if (reg->nlportid == notify->portid) {
9178                                 list_del(&reg->list);
9179                                 kfree(reg);
9180                                 break;
9181                         }
9182                 }
9183                 spin_unlock_bh(&rdev->beacon_registrations_lock);
9184         }
9185
9186         rcu_read_unlock();
9187
9188         return NOTIFY_DONE;
9189 }
9190
9191 static struct notifier_block nl80211_netlink_notifier = {
9192         .notifier_call = nl80211_netlink_notify,
9193 };
9194
9195 /* initialisation/exit functions */
9196
9197 int nl80211_init(void)
9198 {
9199         int err;
9200
9201         err = genl_register_family_with_ops(&nl80211_fam,
9202                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
9203         if (err)
9204                 return err;
9205
9206         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
9207         if (err)
9208                 goto err_out;
9209
9210         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
9211         if (err)
9212                 goto err_out;
9213
9214         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
9215         if (err)
9216                 goto err_out;
9217
9218         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
9219         if (err)
9220                 goto err_out;
9221
9222 #ifdef CONFIG_NL80211_TESTMODE
9223         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
9224         if (err)
9225                 goto err_out;
9226 #endif
9227
9228         err = netlink_register_notifier(&nl80211_netlink_notifier);
9229         if (err)
9230                 goto err_out;
9231
9232         return 0;
9233  err_out:
9234         genl_unregister_family(&nl80211_fam);
9235         return err;
9236 }
9237
9238 void nl80211_exit(void)
9239 {
9240         netlink_unregister_notifier(&nl80211_netlink_notifier);
9241         genl_unregister_family(&nl80211_fam);
9242 }