net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25 #include "rdev-ops.h"
  26
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* returns ERR_PTR values */
  50 static struct wireless_dev *
  51 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  52 {
  53         struct cfg80211_registered_device *rdev;
  54         struct wireless_dev *result = NULL;
  55         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  56         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  57         u64 wdev_id;
  58         int wiphy_idx = -1;
  59         int ifidx = -1;
  60
  61         assert_cfg80211_lock();
  62
  63         if (!have_ifidx && !have_wdev_id)
  64                 return ERR_PTR(-EINVAL);
  65
  66         if (have_ifidx)
  67                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  68         if (have_wdev_id) {
  69                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  70                 wiphy_idx = wdev_id >> 32;
  71         }
  72
  73         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  74                 struct wireless_dev *wdev;
  75
  76                 if (wiphy_net(&rdev->wiphy) != netns)
  77                         continue;
  78
  79                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  80                         continue;
  81
  82                 mutex_lock(&rdev->devlist_mtx);
  83                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94                 mutex_unlock(&rdev->devlist_mtx);
  95
  96                 if (result)
  97                         break;
  98         }
  99
 100         if (result)
 101                 return result;
 102         return ERR_PTR(-ENODEV);
 103 }
 104
 105 static struct cfg80211_registered_device *
 106 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 107 {
 108         struct cfg80211_registered_device *rdev = NULL, *tmp;
 109         struct net_device *netdev;
 110
 111         assert_cfg80211_lock();
 112
 113         if (!attrs[NL80211_ATTR_WIPHY] &&
 114             !attrs[NL80211_ATTR_IFINDEX] &&
 115             !attrs[NL80211_ATTR_WDEV])
 116                 return ERR_PTR(-EINVAL);
 117
 118         if (attrs[NL80211_ATTR_WIPHY])
 119                 rdev = cfg80211_rdev_by_wiphy_idx(
 120                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 121
 122         if (attrs[NL80211_ATTR_WDEV]) {
 123                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 124                 struct wireless_dev *wdev;
 125                 bool found = false;
 126
 127                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 128                 if (tmp) {
 129                         /* make sure wdev exists */
 130                         mutex_lock(&tmp->devlist_mtx);
 131                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 132                                 if (wdev->identifier != (u32)wdev_id)
 133                                         continue;
 134                                 found = true;
 135                                 break;
 136                         }
 137                         mutex_unlock(&tmp->devlist_mtx);
 138
 139                         if (!found)
 140                                 tmp = NULL;
 141
 142                         if (rdev && tmp != rdev)
 143                                 return ERR_PTR(-EINVAL);
 144                         rdev = tmp;
 145                 }
 146         }
 147
 148         if (attrs[NL80211_ATTR_IFINDEX]) {
 149                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 150                 netdev = dev_get_by_index(netns, ifindex);
 151                 if (netdev) {
 152                         if (netdev->ieee80211_ptr)
 153                                 tmp = wiphy_to_dev(
 154                                                 netdev->ieee80211_ptr->wiphy);
 155                         else
 156                                 tmp = NULL;
 157
 158                         dev_put(netdev);
 159
 160                         /* not wireless device -- return error */
 161                         if (!tmp)
 162                                 return ERR_PTR(-EINVAL);
 163
 164                         /* mismatch -- return error */
 165                         if (rdev && tmp != rdev)
 166                                 return ERR_PTR(-EINVAL);
 167
 168                         rdev = tmp;
 169                 }
 170         }
 171
 172         if (!rdev)
 173                 return ERR_PTR(-ENODEV);
 174
 175         if (netns != wiphy_net(&rdev->wiphy))
 176                 return ERR_PTR(-ENODEV);
 177
 178         return rdev;
 179 }
 180
 181 /*
 182  * This function returns a pointer to the driver
 183  * that the genl_info item that is passed refers to.
 184  * If successful, it returns non-NULL and also locks
 185  * the driver's mutex!
 186  *
 187  * This means that you need to call cfg80211_unlock_rdev()
 188  * before being allowed to acquire &cfg80211_mutex!
 189  *
 190  * This is necessary because we need to lock the global
 191  * mutex to get an item off the list safely, and then
 192  * we lock the rdev mutex so it doesn't go away under us.
 193  *
 194  * We don't want to keep cfg80211_mutex locked
 195  * for all the time in order to allow requests on
 196  * other interfaces to go through at the same time.
 197  *
 198  * The result of this can be a PTR_ERR and hence must
 199  * be checked with IS_ERR() for errors.
 200  */
 201 static struct cfg80211_registered_device *
 202 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 203 {
 204         struct cfg80211_registered_device *rdev;
 205
 206         mutex_lock(&cfg80211_mutex);
 207         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 208
 209         /* if it is not an error we grab the lock on
 210          * it to assure it won't be going away while
 211          * we operate on it */
 212         if (!IS_ERR(rdev))
 213                 mutex_lock(&rdev->mtx);
 214
 215         mutex_unlock(&cfg80211_mutex);
 216
 217         return rdev;
 218 }
 219
 220 /* policy for the attributes */
 221 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 222         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 223         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 224                                       .len = 20-1 },
 225         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 226
 227         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 229         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 232
 233         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 234         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 236         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 238
 239         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 240         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 242
 243         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 244         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 245
 246         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 247         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 248                                     .len = WLAN_MAX_KEY_LEN },
 249         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 250         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 251         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 252         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 253         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 256         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 257         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 258                                        .len = IEEE80211_MAX_DATA_LEN },
 259         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 260                                        .len = IEEE80211_MAX_DATA_LEN },
 261         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 262         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 264         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 265                                                .len = NL80211_MAX_SUPP_RATES },
 266         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 267         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 268         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 269         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 270                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 271         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 272
 273         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 274         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 277         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 280                                            .len = NL80211_MAX_SUPP_RATES },
 281         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 282
 283         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 284         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 285
 286         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 287
 288         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 289         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 290                               .len = IEEE80211_MAX_DATA_LEN },
 291         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 292         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 293
 294         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 295                                 .len = IEEE80211_MAX_SSID_LEN },
 296         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 297         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 301         [NL80211_ATTR_STA_FLAGS2] = {
 302                 .len = sizeof(struct nl80211_sta_flag_update),
 303         },
 304         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 305         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 306         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 307         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 309         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 310         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 311         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 312         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 313                                  .len = WLAN_PMKID_LEN },
 314         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 315         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 316         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 317         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 318                                  .len = IEEE80211_MAX_DATA_LEN },
 319         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 320         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 321         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 322         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 323         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 326         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 327         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 330         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 332         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 334         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 335         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 336         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 338         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 339                                          .len = IEEE80211_MAX_DATA_LEN },
 340         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 341                                          .len = IEEE80211_MAX_DATA_LEN },
 342         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 344         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 346         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 352                                       .len = IEEE80211_MAX_DATA_LEN },
 353         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 354         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 355         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 356                 .len = NL80211_HT_CAPABILITY_LEN
 357         },
 358         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 359         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 360         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 361         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 362         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 363         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 364         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 365         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 366         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 367         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 368 };
 369
 370 /* policy for the key attributes */
 371 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 372         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 373         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 374         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 375         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 376         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 377         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 378         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 379         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 380 };
 381
 382 /* policy for the key default flags */
 383 static const struct nla_policy
 384 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 385         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 386         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 387 };
 388
 389 /* policy for WoWLAN attributes */
 390 static const struct nla_policy
 391 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 392         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 394         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 395         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 396         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 397         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 398         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 400 };
 401
 402 /* policy for GTK rekey offload attributes */
 403 static const struct nla_policy
 404 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 405         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 406         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 407         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 408 };
 409
 410 static const struct nla_policy
 411 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 412         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 413                                                  .len = IEEE80211_MAX_SSID_LEN },
 414         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 415 };
 416
 417 /* ifidx get helper */
 418 static int nl80211_get_ifidx(struct netlink_callback *cb)
 419 {
 420         int res;
 421
 422         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 423                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 424                           nl80211_policy);
 425         if (res)
 426                 return res;
 427
 428         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 429                 return -EINVAL;
 430
 431         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 432         if (!res)
 433                 return -EINVAL;
 434         return res;
 435 }
 436
 437 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 438                                        struct netlink_callback *cb,
 439                                        struct cfg80211_registered_device **rdev,
 440                                        struct net_device **dev)
 441 {
 442         int ifidx = cb->args[0];
 443         int err;
 444
 445         if (!ifidx)
 446                 ifidx = nl80211_get_ifidx(cb);
 447         if (ifidx < 0)
 448                 return ifidx;
 449
 450         cb->args[0] = ifidx;
 451
 452         rtnl_lock();
 453
 454         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 455         if (!*dev) {
 456                 err = -ENODEV;
 457                 goto out_rtnl;
 458         }
 459
 460         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 461         if (IS_ERR(*rdev)) {
 462                 err = PTR_ERR(*rdev);
 463                 goto out_rtnl;
 464         }
 465
 466         return 0;
 467  out_rtnl:
 468         rtnl_unlock();
 469         return err;
 470 }
 471
 472 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 473 {
 474         cfg80211_unlock_rdev(rdev);
 475         rtnl_unlock();
 476 }
 477
 478 /* IE validation */
 479 static bool is_valid_ie_attr(const struct nlattr *attr)
 480 {
 481         const u8 *pos;
 482         int len;
 483
 484         if (!attr)
 485                 return true;
 486
 487         pos = nla_data(attr);
 488         len = nla_len(attr);
 489
 490         while (len) {
 491                 u8 elemlen;
 492
 493                 if (len < 2)
 494                         return false;
 495                 len -= 2;
 496
 497                 elemlen = pos[1];
 498                 if (elemlen > len)
 499                         return false;
 500
 501                 len -= elemlen;
 502                 pos += 2 + elemlen;
 503         }
 504
 505         return true;
 506 }
 507
 508 /* message building helper */
 509 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 510                                    int flags, u8 cmd)
 511 {
 512         /* since there is no private header just add the generic one */
 513         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 514 }
 515
 516 static int nl80211_msg_put_channel(struct sk_buff *msg,
 517                                    struct ieee80211_channel *chan)
 518 {
 519         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 520                         chan->center_freq))
 521                 goto nla_put_failure;
 522
 523         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 524             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 525                 goto nla_put_failure;
 526         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 527             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 528                 goto nla_put_failure;
 529         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 530             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 531                 goto nla_put_failure;
 532         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 533             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 534                 goto nla_put_failure;
 535
 536         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 537                         DBM_TO_MBM(chan->max_power)))
 538                 goto nla_put_failure;
 539
 540         return 0;
 541
 542  nla_put_failure:
 543         return -ENOBUFS;
 544 }
 545
 546 /* netlink command implementations */
 547
 548 struct key_parse {
 549         struct key_params p;
 550         int idx;
 551         int type;
 552         bool def, defmgmt;
 553         bool def_uni, def_multi;
 554 };
 555
 556 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 557 {
 558         struct nlattr *tb[NL80211_KEY_MAX + 1];
 559         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 560                                    nl80211_key_policy);
 561         if (err)
 562                 return err;
 563
 564         k->def = !!tb[NL80211_KEY_DEFAULT];
 565         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 566
 567         if (k->def) {
 568                 k->def_uni = true;
 569                 k->def_multi = true;
 570         }
 571         if (k->defmgmt)
 572                 k->def_multi = true;
 573
 574         if (tb[NL80211_KEY_IDX])
 575                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 576
 577         if (tb[NL80211_KEY_DATA]) {
 578                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 579                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 580         }
 581
 582         if (tb[NL80211_KEY_SEQ]) {
 583                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 584                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 585         }
 586
 587         if (tb[NL80211_KEY_CIPHER])
 588                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 589
 590         if (tb[NL80211_KEY_TYPE]) {
 591                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 592                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 593                         return -EINVAL;
 594         }
 595
 596         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 597                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 598                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 599                                        tb[NL80211_KEY_DEFAULT_TYPES],
 600                                        nl80211_key_default_policy);
 601                 if (err)
 602                         return err;
 603
 604                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 605                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 606         }
 607
 608         return 0;
 609 }
 610
 611 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 612 {
 613         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 614                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 615                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 616         }
 617
 618         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 619                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 620                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 621         }
 622
 623         if (info->attrs[NL80211_ATTR_KEY_IDX])
 624                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 625
 626         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 627                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 628
 629         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 630         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 631
 632         if (k->def) {
 633                 k->def_uni = true;
 634                 k->def_multi = true;
 635         }
 636         if (k->defmgmt)
 637                 k->def_multi = true;
 638
 639         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 640                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 641                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 642                         return -EINVAL;
 643         }
 644
 645         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 646                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 647                 int err = nla_parse_nested(
 648                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 649                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 650                                 nl80211_key_default_policy);
 651                 if (err)
 652                         return err;
 653
 654                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 655                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 656         }
 657
 658         return 0;
 659 }
 660
 661 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 662 {
 663         int err;
 664
 665         memset(k, 0, sizeof(*k));
 666         k->idx = -1;
 667         k->type = -1;
 668
 669         if (info->attrs[NL80211_ATTR_KEY])
 670                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 671         else
 672                 err = nl80211_parse_key_old(info, k);
 673
 674         if (err)
 675                 return err;
 676
 677         if (k->def && k->defmgmt)
 678                 return -EINVAL;
 679
 680         if (k->defmgmt) {
 681                 if (k->def_uni || !k->def_multi)
 682                         return -EINVAL;
 683         }
 684
 685         if (k->idx != -1) {
 686                 if (k->defmgmt) {
 687                         if (k->idx < 4 || k->idx > 5)
 688                                 return -EINVAL;
 689                 } else if (k->def) {
 690                         if (k->idx < 0 || k->idx > 3)
 691                                 return -EINVAL;
 692                 } else {
 693                         if (k->idx < 0 || k->idx > 5)
 694                                 return -EINVAL;
 695                 }
 696         }
 697
 698         return 0;
 699 }
 700
 701 static struct cfg80211_cached_keys *
 702 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 703                        struct nlattr *keys, bool *no_ht)
 704 {
 705         struct key_parse parse;
 706         struct nlattr *key;
 707         struct cfg80211_cached_keys *result;
 708         int rem, err, def = 0;
 709
 710         result = kzalloc(sizeof(*result), GFP_KERNEL);
 711         if (!result)
 712                 return ERR_PTR(-ENOMEM);
 713
 714         result->def = -1;
 715         result->defmgmt = -1;
 716
 717         nla_for_each_nested(key, keys, rem) {
 718                 memset(&parse, 0, sizeof(parse));
 719                 parse.idx = -1;
 720
 721                 err = nl80211_parse_key_new(key, &parse);
 722                 if (err)
 723                         goto error;
 724                 err = -EINVAL;
 725                 if (!parse.p.key)
 726                         goto error;
 727                 if (parse.idx < 0 || parse.idx > 4)
 728                         goto error;
 729                 if (parse.def) {
 730                         if (def)
 731                                 goto error;
 732                         def = 1;
 733                         result->def = parse.idx;
 734                         if (!parse.def_uni || !parse.def_multi)
 735                                 goto error;
 736                 } else if (parse.defmgmt)
 737                         goto error;
 738                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 739                                                      parse.idx, false, NULL);
 740                 if (err)
 741                         goto error;
 742                 result->params[parse.idx].cipher = parse.p.cipher;
 743                 result->params[parse.idx].key_len = parse.p.key_len;
 744                 result->params[parse.idx].key = result->data[parse.idx];
 745                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 746
 747                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 748                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 749                         if (no_ht)
 750                                 *no_ht = true;
 751                 }
 752         }
 753
 754         return result;
 755  error:
 756         kfree(result);
 757         return ERR_PTR(err);
 758 }
 759
 760 static int nl80211_key_allowed(struct wireless_dev *wdev)
 761 {
 762         ASSERT_WDEV_LOCK(wdev);
 763
 764         switch (wdev->iftype) {
 765         case NL80211_IFTYPE_AP:
 766         case NL80211_IFTYPE_AP_VLAN:
 767         case NL80211_IFTYPE_P2P_GO:
 768         case NL80211_IFTYPE_MESH_POINT:
 769                 break;
 770         case NL80211_IFTYPE_ADHOC:
 771                 if (!wdev->current_bss)
 772                         return -ENOLINK;
 773                 break;
 774         case NL80211_IFTYPE_STATION:
 775         case NL80211_IFTYPE_P2P_CLIENT:
 776                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 777                         return -ENOLINK;
 778                 break;
 779         default:
 780                 return -EINVAL;
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 787 {
 788         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 789         int i;
 790
 791         if (!nl_modes)
 792                 goto nla_put_failure;
 793
 794         i = 0;
 795         while (ifmodes) {
 796                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 797                         goto nla_put_failure;
 798                 ifmodes >>= 1;
 799                 i++;
 800         }
 801
 802         nla_nest_end(msg, nl_modes);
 803         return 0;
 804
 805 nla_put_failure:
 806         return -ENOBUFS;
 807 }
 808
 809 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 810                                           struct sk_buff *msg)
 811 {
 812         struct nlattr *nl_combis;
 813         int i, j;
 814
 815         nl_combis = nla_nest_start(msg,
 816                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 817         if (!nl_combis)
 818                 goto nla_put_failure;
 819
 820         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 821                 const struct ieee80211_iface_combination *c;
 822                 struct nlattr *nl_combi, *nl_limits;
 823
 824                 c = &wiphy->iface_combinations[i];
 825
 826                 nl_combi = nla_nest_start(msg, i + 1);
 827                 if (!nl_combi)
 828                         goto nla_put_failure;
 829
 830                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 831                 if (!nl_limits)
 832                         goto nla_put_failure;
 833
 834                 for (j = 0; j < c->n_limits; j++) {
 835                         struct nlattr *nl_limit;
 836
 837                         nl_limit = nla_nest_start(msg, j + 1);
 838                         if (!nl_limit)
 839                                 goto nla_put_failure;
 840                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 841                                         c->limits[j].max))
 842                                 goto nla_put_failure;
 843                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 844                                                 c->limits[j].types))
 845                                 goto nla_put_failure;
 846                         nla_nest_end(msg, nl_limit);
 847                 }
 848
 849                 nla_nest_end(msg, nl_limits);
 850
 851                 if (c->beacon_int_infra_match &&
 852                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 853                         goto nla_put_failure;
 854                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 855                                 c->num_different_channels) ||
 856                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 857                                 c->max_interfaces))
 858                         goto nla_put_failure;
 859
 860                 nla_nest_end(msg, nl_combi);
 861         }
 862
 863         nla_nest_end(msg, nl_combis);
 864
 865         return 0;
 866 nla_put_failure:
 867         return -ENOBUFS;
 868 }
 869
 870 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 871                               struct cfg80211_registered_device *dev)
 872 {
 873         void *hdr;
 874         struct nlattr *nl_bands, *nl_band;
 875         struct nlattr *nl_freqs, *nl_freq;
 876         struct nlattr *nl_rates, *nl_rate;
 877         struct nlattr *nl_cmds;
 878         enum ieee80211_band band;
 879         struct ieee80211_channel *chan;
 880         struct ieee80211_rate *rate;
 881         int i;
 882         const struct ieee80211_txrx_stypes *mgmt_stypes =
 883                                 dev->wiphy.mgmt_stypes;
 884
 885         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 886         if (!hdr)
 887                 return -1;
 888
 889         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 890             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 891             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 892                         cfg80211_rdev_list_generation) ||
 893             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 894                        dev->wiphy.retry_short) ||
 895             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 896                        dev->wiphy.retry_long) ||
 897             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 898                         dev->wiphy.frag_threshold) ||
 899             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 900                         dev->wiphy.rts_threshold) ||
 901             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 902                        dev->wiphy.coverage_class) ||
 903             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 904                        dev->wiphy.max_scan_ssids) ||
 905             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 906                        dev->wiphy.max_sched_scan_ssids) ||
 907             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 908                         dev->wiphy.max_scan_ie_len) ||
 909             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 910                         dev->wiphy.max_sched_scan_ie_len) ||
 911             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 912                        dev->wiphy.max_match_sets))
 913                 goto nla_put_failure;
 914
 915         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 916             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 917                 goto nla_put_failure;
 918         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 919             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 920                 goto nla_put_failure;
 921         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 922             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 923                 goto nla_put_failure;
 924         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 925             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 926                 goto nla_put_failure;
 927         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 928             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 929                 goto nla_put_failure;
 930         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 931             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 932                 goto nla_put_failure;
 933
 934         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 935                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 936                     dev->wiphy.cipher_suites))
 937                 goto nla_put_failure;
 938
 939         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 940                        dev->wiphy.max_num_pmkids))
 941                 goto nla_put_failure;
 942
 943         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 944             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 945                 goto nla_put_failure;
 946
 947         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 948                         dev->wiphy.available_antennas_tx) ||
 949             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 950                         dev->wiphy.available_antennas_rx))
 951                 goto nla_put_failure;
 952
 953         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 954             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 955                         dev->wiphy.probe_resp_offload))
 956                 goto nla_put_failure;
 957
 958         if ((dev->wiphy.available_antennas_tx ||
 959              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 960                 u32 tx_ant = 0, rx_ant = 0;
 961                 int res;
 962                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 963                 if (!res) {
 964                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 965                                         tx_ant) ||
 966                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 967                                         rx_ant))
 968                                 goto nla_put_failure;
 969                 }
 970         }
 971
 972         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 973                                 dev->wiphy.interface_modes))
 974                 goto nla_put_failure;
 975
 976         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 977         if (!nl_bands)
 978                 goto nla_put_failure;
 979
 980         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 981                 if (!dev->wiphy.bands[band])
 982                         continue;
 983
 984                 nl_band = nla_nest_start(msg, band);
 985                 if (!nl_band)
 986                         goto nla_put_failure;
 987
 988                 /* add HT info */
 989                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 990                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 991                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 992                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 993                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 994                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 995                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 996                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 997                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 998                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 999                         goto nla_put_failure;
1000
1001                 /* add VHT info */
1002                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1003                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1004                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1005                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1006                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1007                                  dev->wiphy.bands[band]->vht_cap.cap)))
1008                         goto nla_put_failure;
1009
1010                 /* add frequencies */
1011                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1012                 if (!nl_freqs)
1013                         goto nla_put_failure;
1014
1015                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1016                         nl_freq = nla_nest_start(msg, i);
1017                         if (!nl_freq)
1018                                 goto nla_put_failure;
1019
1020                         chan = &dev->wiphy.bands[band]->channels[i];
1021
1022                         if (nl80211_msg_put_channel(msg, chan))
1023                                 goto nla_put_failure;
1024
1025                         nla_nest_end(msg, nl_freq);
1026                 }
1027
1028                 nla_nest_end(msg, nl_freqs);
1029
1030                 /* add bitrates */
1031                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1032                 if (!nl_rates)
1033                         goto nla_put_failure;
1034
1035                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1036                         nl_rate = nla_nest_start(msg, i);
1037                         if (!nl_rate)
1038                                 goto nla_put_failure;
1039
1040                         rate = &dev->wiphy.bands[band]->bitrates[i];
1041                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1042                                         rate->bitrate))
1043                                 goto nla_put_failure;
1044                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1045                             nla_put_flag(msg,
1046                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1047                                 goto nla_put_failure;
1048
1049                         nla_nest_end(msg, nl_rate);
1050                 }
1051
1052                 nla_nest_end(msg, nl_rates);
1053
1054                 nla_nest_end(msg, nl_band);
1055         }
1056         nla_nest_end(msg, nl_bands);
1057
1058         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1059         if (!nl_cmds)
1060                 goto nla_put_failure;
1061
1062         i = 0;
1063 #define CMD(op, n)                                              \
1064          do {                                                   \
1065                 if (dev->ops->op) {                             \
1066                         i++;                                    \
1067                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1068                                 goto nla_put_failure;           \
1069                 }                                               \
1070         } while (0)
1071
1072         CMD(add_virtual_intf, NEW_INTERFACE);
1073         CMD(change_virtual_intf, SET_INTERFACE);
1074         CMD(add_key, NEW_KEY);
1075         CMD(start_ap, START_AP);
1076         CMD(add_station, NEW_STATION);
1077         CMD(add_mpath, NEW_MPATH);
1078         CMD(update_mesh_config, SET_MESH_CONFIG);
1079         CMD(change_bss, SET_BSS);
1080         CMD(auth, AUTHENTICATE);
1081         CMD(assoc, ASSOCIATE);
1082         CMD(deauth, DEAUTHENTICATE);
1083         CMD(disassoc, DISASSOCIATE);
1084         CMD(join_ibss, JOIN_IBSS);
1085         CMD(join_mesh, JOIN_MESH);
1086         CMD(set_pmksa, SET_PMKSA);
1087         CMD(del_pmksa, DEL_PMKSA);
1088         CMD(flush_pmksa, FLUSH_PMKSA);
1089         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1090                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1091         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1092         CMD(mgmt_tx, FRAME);
1093         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1094         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1095                 i++;
1096                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1097                         goto nla_put_failure;
1098         }
1099         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1100             dev->ops->join_mesh) {
1101                 i++;
1102                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1103                         goto nla_put_failure;
1104         }
1105         CMD(set_wds_peer, SET_WDS_PEER);
1106         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1107                 CMD(tdls_mgmt, TDLS_MGMT);
1108                 CMD(tdls_oper, TDLS_OPER);
1109         }
1110         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1111                 CMD(sched_scan_start, START_SCHED_SCAN);
1112         CMD(probe_client, PROBE_CLIENT);
1113         CMD(set_noack_map, SET_NOACK_MAP);
1114         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1115                 i++;
1116                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1117                         goto nla_put_failure;
1118         }
1119         CMD(start_p2p_device, START_P2P_DEVICE);
1120         CMD(set_mcast_rate, SET_MCAST_RATE);
1121
1122 #ifdef CONFIG_NL80211_TESTMODE
1123         CMD(testmode_cmd, TESTMODE);
1124 #endif
1125
1126 #undef CMD
1127
1128         if (dev->ops->connect || dev->ops->auth) {
1129                 i++;
1130                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1131                         goto nla_put_failure;
1132         }
1133
1134         if (dev->ops->disconnect || dev->ops->deauth) {
1135                 i++;
1136                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1137                         goto nla_put_failure;
1138         }
1139
1140         nla_nest_end(msg, nl_cmds);
1141
1142         if (dev->ops->remain_on_channel &&
1143             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1144             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1145                         dev->wiphy.max_remain_on_channel_duration))
1146                 goto nla_put_failure;
1147
1148         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1149             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1150                 goto nla_put_failure;
1151
1152         if (mgmt_stypes) {
1153                 u16 stypes;
1154                 struct nlattr *nl_ftypes, *nl_ifs;
1155                 enum nl80211_iftype ift;
1156
1157                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1158                 if (!nl_ifs)
1159                         goto nla_put_failure;
1160
1161                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1162                         nl_ftypes = nla_nest_start(msg, ift);
1163                         if (!nl_ftypes)
1164                                 goto nla_put_failure;
1165                         i = 0;
1166                         stypes = mgmt_stypes[ift].tx;
1167                         while (stypes) {
1168                                 if ((stypes & 1) &&
1169                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1170                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1171                                         goto nla_put_failure;
1172                                 stypes >>= 1;
1173                                 i++;
1174                         }
1175                         nla_nest_end(msg, nl_ftypes);
1176                 }
1177
1178                 nla_nest_end(msg, nl_ifs);
1179
1180                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1181                 if (!nl_ifs)
1182                         goto nla_put_failure;
1183
1184                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1185                         nl_ftypes = nla_nest_start(msg, ift);
1186                         if (!nl_ftypes)
1187                                 goto nla_put_failure;
1188                         i = 0;
1189                         stypes = mgmt_stypes[ift].rx;
1190                         while (stypes) {
1191                                 if ((stypes & 1) &&
1192                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1193                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1194                                         goto nla_put_failure;
1195                                 stypes >>= 1;
1196                                 i++;
1197                         }
1198                         nla_nest_end(msg, nl_ftypes);
1199                 }
1200                 nla_nest_end(msg, nl_ifs);
1201         }
1202
1203 #ifdef CONFIG_PM
1204         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1205                 struct nlattr *nl_wowlan;
1206
1207                 nl_wowlan = nla_nest_start(msg,
1208                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1209                 if (!nl_wowlan)
1210                         goto nla_put_failure;
1211
1212                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1213                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1214                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1215                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1216                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1217                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1218                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1219                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1220                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1221                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1222                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1224                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1226                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1227                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1228                     goto nla_put_failure;
1229                 if (dev->wiphy.wowlan.n_patterns) {
1230                         struct nl80211_wowlan_pattern_support pat = {
1231                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1232                                 .min_pattern_len =
1233                                         dev->wiphy.wowlan.pattern_min_len,
1234                                 .max_pattern_len =
1235                                         dev->wiphy.wowlan.pattern_max_len,
1236                         };
1237                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1238                                     sizeof(pat), &pat))
1239                                 goto nla_put_failure;
1240                 }
1241
1242                 nla_nest_end(msg, nl_wowlan);
1243         }
1244 #endif
1245
1246         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1247                                 dev->wiphy.software_iftypes))
1248                 goto nla_put_failure;
1249
1250         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1251                 goto nla_put_failure;
1252
1253         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1254             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1255                         dev->wiphy.ap_sme_capa))
1256                 goto nla_put_failure;
1257
1258         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1259                         dev->wiphy.features))
1260                 goto nla_put_failure;
1261
1262         if (dev->wiphy.ht_capa_mod_mask &&
1263             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1264                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1265                     dev->wiphy.ht_capa_mod_mask))
1266                 goto nla_put_failure;
1267
1268         return genlmsg_end(msg, hdr);
1269
1270  nla_put_failure:
1271         genlmsg_cancel(msg, hdr);
1272         return -EMSGSIZE;
1273 }
1274
1275 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1276 {
1277         int idx = 0;
1278         int start = cb->args[0];
1279         struct cfg80211_registered_device *dev;
1280
1281         mutex_lock(&cfg80211_mutex);
1282         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1283                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1284                         continue;
1285                 if (++idx <= start)
1286                         continue;
1287                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1288                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1289                                        dev) < 0) {
1290                         idx--;
1291                         break;
1292                 }
1293         }
1294         mutex_unlock(&cfg80211_mutex);
1295
1296         cb->args[0] = idx;
1297
1298         return skb->len;
1299 }
1300
1301 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1302 {
1303         struct sk_buff *msg;
1304         struct cfg80211_registered_device *dev = info->user_ptr[0];
1305
1306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1307         if (!msg)
1308                 return -ENOMEM;
1309
1310         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1311                 nlmsg_free(msg);
1312                 return -ENOBUFS;
1313         }
1314
1315         return genlmsg_reply(msg, info);
1316 }
1317
1318 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1319         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1320         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1321         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1322         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1323         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1324 };
1325
1326 static int parse_txq_params(struct nlattr *tb[],
1327                             struct ieee80211_txq_params *txq_params)
1328 {
1329         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1330             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1331             !tb[NL80211_TXQ_ATTR_AIFS])
1332                 return -EINVAL;
1333
1334         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1335         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1336         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1337         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1338         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1339
1340         if (txq_params->ac >= NL80211_NUM_ACS)
1341                 return -EINVAL;
1342
1343         return 0;
1344 }
1345
1346 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1347 {
1348         /*
1349          * You can only set the channel explicitly for WDS interfaces,
1350          * all others have their channel managed via their respective
1351          * "establish a connection" command (connect, join, ...)
1352          *
1353          * For AP/GO and mesh mode, the channel can be set with the
1354          * channel userspace API, but is only stored and passed to the
1355          * low-level driver when the AP starts or the mesh is joined.
1356          * This is for backward compatibility, userspace can also give
1357          * the channel in the start-ap or join-mesh commands instead.
1358          *
1359          * Monitors are special as they are normally slaved to
1360          * whatever else is going on, so they have their own special
1361          * operation to set the monitor channel if possible.
1362          */
1363         return !wdev ||
1364                 wdev->iftype == NL80211_IFTYPE_AP ||
1365                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1366                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1367                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1368 }
1369
1370 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1371                                  struct genl_info *info,
1372                                  struct cfg80211_chan_def *chandef)
1373 {
1374         u32 control_freq;
1375
1376         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1377                 return -EINVAL;
1378
1379         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1380
1381         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1382         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1383         chandef->center_freq1 = control_freq;
1384         chandef->center_freq2 = 0;
1385
1386         /* Primary channel not allowed */
1387         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1388                 return -EINVAL;
1389
1390         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1391                 enum nl80211_channel_type chantype;
1392
1393                 chantype = nla_get_u32(
1394                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1395
1396                 switch (chantype) {
1397                 case NL80211_CHAN_NO_HT:
1398                 case NL80211_CHAN_HT20:
1399                 case NL80211_CHAN_HT40PLUS:
1400                 case NL80211_CHAN_HT40MINUS:
1401                         cfg80211_chandef_create(chandef, chandef->chan,
1402                                                 chantype);
1403                         break;
1404                 default:
1405                         return -EINVAL;
1406                 }
1407         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1408                 chandef->width =
1409                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1410                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1411                         chandef->center_freq1 =
1412                                 nla_get_u32(
1413                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1414                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1415                         chandef->center_freq2 =
1416                                 nla_get_u32(
1417                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1418         }
1419
1420         if (!cfg80211_chandef_valid(chandef))
1421                 return -EINVAL;
1422
1423         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1424                                      IEEE80211_CHAN_DISABLED))
1425                 return -EINVAL;
1426
1427         return 0;
1428 }
1429
1430 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1431                                  struct wireless_dev *wdev,
1432                                  struct genl_info *info)
1433 {
1434         struct cfg80211_chan_def chandef;
1435         int result;
1436         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1437
1438         if (wdev)
1439                 iftype = wdev->iftype;
1440
1441         if (!nl80211_can_set_dev_channel(wdev))
1442                 return -EOPNOTSUPP;
1443
1444         result = nl80211_parse_chandef(rdev, info, &chandef);
1445         if (result)
1446                 return result;
1447
1448         mutex_lock(&rdev->devlist_mtx);
1449         switch (iftype) {
1450         case NL80211_IFTYPE_AP:
1451         case NL80211_IFTYPE_P2P_GO:
1452                 if (wdev->beacon_interval) {
1453                         result = -EBUSY;
1454                         break;
1455                 }
1456                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1457                         result = -EINVAL;
1458                         break;
1459                 }
1460                 wdev->preset_chandef = chandef;
1461                 result = 0;
1462                 break;
1463         case NL80211_IFTYPE_MESH_POINT:
1464                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1465                 break;
1466         case NL80211_IFTYPE_MONITOR:
1467                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1468                 break;
1469         default:
1470                 result = -EINVAL;
1471         }
1472         mutex_unlock(&rdev->devlist_mtx);
1473
1474         return result;
1475 }
1476
1477 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1478 {
1479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1480         struct net_device *netdev = info->user_ptr[1];
1481
1482         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1483 }
1484
1485 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1486 {
1487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1488         struct net_device *dev = info->user_ptr[1];
1489         struct wireless_dev *wdev = dev->ieee80211_ptr;
1490         const u8 *bssid;
1491
1492         if (!info->attrs[NL80211_ATTR_MAC])
1493                 return -EINVAL;
1494
1495         if (netif_running(dev))
1496                 return -EBUSY;
1497
1498         if (!rdev->ops->set_wds_peer)
1499                 return -EOPNOTSUPP;
1500
1501         if (wdev->iftype != NL80211_IFTYPE_WDS)
1502                 return -EOPNOTSUPP;
1503
1504         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1505         return rdev_set_wds_peer(rdev, dev, bssid);
1506 }
1507
1508
1509 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1510 {
1511         struct cfg80211_registered_device *rdev;
1512         struct net_device *netdev = NULL;
1513         struct wireless_dev *wdev;
1514         int result = 0, rem_txq_params = 0;
1515         struct nlattr *nl_txq_params;
1516         u32 changed;
1517         u8 retry_short = 0, retry_long = 0;
1518         u32 frag_threshold = 0, rts_threshold = 0;
1519         u8 coverage_class = 0;
1520
1521         /*
1522          * Try to find the wiphy and netdev. Normally this
1523          * function shouldn't need the netdev, but this is
1524          * done for backward compatibility -- previously
1525          * setting the channel was done per wiphy, but now
1526          * it is per netdev. Previous userland like hostapd
1527          * also passed a netdev to set_wiphy, so that it is
1528          * possible to let that go to the right netdev!
1529          */
1530         mutex_lock(&cfg80211_mutex);
1531
1532         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1533                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1534
1535                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1536                 if (netdev && netdev->ieee80211_ptr) {
1537                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1538                         mutex_lock(&rdev->mtx);
1539                 } else
1540                         netdev = NULL;
1541         }
1542
1543         if (!netdev) {
1544                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1545                                                   info->attrs);
1546                 if (IS_ERR(rdev)) {
1547                         mutex_unlock(&cfg80211_mutex);
1548                         return PTR_ERR(rdev);
1549                 }
1550                 wdev = NULL;
1551                 netdev = NULL;
1552                 result = 0;
1553
1554                 mutex_lock(&rdev->mtx);
1555         } else
1556                 wdev = netdev->ieee80211_ptr;
1557
1558         /*
1559          * end workaround code, by now the rdev is available
1560          * and locked, and wdev may or may not be NULL.
1561          */
1562
1563         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1564                 result = cfg80211_dev_rename(
1565                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1566
1567         mutex_unlock(&cfg80211_mutex);
1568
1569         if (result)
1570                 goto bad_res;
1571
1572         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1573                 struct ieee80211_txq_params txq_params;
1574                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1575
1576                 if (!rdev->ops->set_txq_params) {
1577                         result = -EOPNOTSUPP;
1578                         goto bad_res;
1579                 }
1580
1581                 if (!netdev) {
1582                         result = -EINVAL;
1583                         goto bad_res;
1584                 }
1585
1586                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1587                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1588                         result = -EINVAL;
1589                         goto bad_res;
1590                 }
1591
1592                 if (!netif_running(netdev)) {
1593                         result = -ENETDOWN;
1594                         goto bad_res;
1595                 }
1596
1597                 nla_for_each_nested(nl_txq_params,
1598                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1599                                     rem_txq_params) {
1600                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1601                                   nla_data(nl_txq_params),
1602                                   nla_len(nl_txq_params),
1603                                   txq_params_policy);
1604                         result = parse_txq_params(tb, &txq_params);
1605                         if (result)
1606                                 goto bad_res;
1607
1608                         result = rdev_set_txq_params(rdev, netdev,
1609                                                      &txq_params);
1610                         if (result)
1611                                 goto bad_res;
1612                 }
1613         }
1614
1615         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1616                 result = __nl80211_set_channel(rdev,
1617                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1618                                 info);
1619                 if (result)
1620                         goto bad_res;
1621         }
1622
1623         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1624                 struct wireless_dev *txp_wdev = wdev;
1625                 enum nl80211_tx_power_setting type;
1626                 int idx, mbm = 0;
1627
1628                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1629                         txp_wdev = NULL;
1630
1631                 if (!rdev->ops->set_tx_power) {
1632                         result = -EOPNOTSUPP;
1633                         goto bad_res;
1634                 }
1635
1636                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1637                 type = nla_get_u32(info->attrs[idx]);
1638
1639                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1640                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1641                         result = -EINVAL;
1642                         goto bad_res;
1643                 }
1644
1645                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1646                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1647                         mbm = nla_get_u32(info->attrs[idx]);
1648                 }
1649
1650                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1651                 if (result)
1652                         goto bad_res;
1653         }
1654
1655         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1656             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1657                 u32 tx_ant, rx_ant;
1658                 if ((!rdev->wiphy.available_antennas_tx &&
1659                      !rdev->wiphy.available_antennas_rx) ||
1660                     !rdev->ops->set_antenna) {
1661                         result = -EOPNOTSUPP;
1662                         goto bad_res;
1663                 }
1664
1665                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1666                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1667
1668                 /* reject antenna configurations which don't match the
1669                  * available antenna masks, except for the "all" mask */
1670                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1671                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1672                         result = -EINVAL;
1673                         goto bad_res;
1674                 }
1675
1676                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1677                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1678
1679                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1680                 if (result)
1681                         goto bad_res;
1682         }
1683
1684         changed = 0;
1685
1686         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1687                 retry_short = nla_get_u8(
1688                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1689                 if (retry_short == 0) {
1690                         result = -EINVAL;
1691                         goto bad_res;
1692                 }
1693                 changed |= WIPHY_PARAM_RETRY_SHORT;
1694         }
1695
1696         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1697                 retry_long = nla_get_u8(
1698                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1699                 if (retry_long == 0) {
1700                         result = -EINVAL;
1701                         goto bad_res;
1702                 }
1703                 changed |= WIPHY_PARAM_RETRY_LONG;
1704         }
1705
1706         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1707                 frag_threshold = nla_get_u32(
1708                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1709                 if (frag_threshold < 256) {
1710                         result = -EINVAL;
1711                         goto bad_res;
1712                 }
1713                 if (frag_threshold != (u32) -1) {
1714                         /*
1715                          * Fragments (apart from the last one) are required to
1716                          * have even length. Make the fragmentation code
1717                          * simpler by stripping LSB should someone try to use
1718                          * odd threshold value.
1719                          */
1720                         frag_threshold &= ~0x1;
1721                 }
1722                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1723         }
1724
1725         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1726                 rts_threshold = nla_get_u32(
1727                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1728                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1729         }
1730
1731         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1732                 coverage_class = nla_get_u8(
1733                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1734                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1735         }
1736
1737         if (changed) {
1738                 u8 old_retry_short, old_retry_long;
1739                 u32 old_frag_threshold, old_rts_threshold;
1740                 u8 old_coverage_class;
1741
1742                 if (!rdev->ops->set_wiphy_params) {
1743                         result = -EOPNOTSUPP;
1744                         goto bad_res;
1745                 }
1746
1747                 old_retry_short = rdev->wiphy.retry_short;
1748                 old_retry_long = rdev->wiphy.retry_long;
1749                 old_frag_threshold = rdev->wiphy.frag_threshold;
1750                 old_rts_threshold = rdev->wiphy.rts_threshold;
1751                 old_coverage_class = rdev->wiphy.coverage_class;
1752
1753                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1754                         rdev->wiphy.retry_short = retry_short;
1755                 if (changed & WIPHY_PARAM_RETRY_LONG)
1756                         rdev->wiphy.retry_long = retry_long;
1757                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1758                         rdev->wiphy.frag_threshold = frag_threshold;
1759                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1760                         rdev->wiphy.rts_threshold = rts_threshold;
1761                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1762                         rdev->wiphy.coverage_class = coverage_class;
1763
1764                 result = rdev_set_wiphy_params(rdev, changed);
1765                 if (result) {
1766                         rdev->wiphy.retry_short = old_retry_short;
1767                         rdev->wiphy.retry_long = old_retry_long;
1768                         rdev->wiphy.frag_threshold = old_frag_threshold;
1769                         rdev->wiphy.rts_threshold = old_rts_threshold;
1770                         rdev->wiphy.coverage_class = old_coverage_class;
1771                 }
1772         }
1773
1774  bad_res:
1775         mutex_unlock(&rdev->mtx);
1776         if (netdev)
1777                 dev_put(netdev);
1778         return result;
1779 }
1780
1781 static inline u64 wdev_id(struct wireless_dev *wdev)
1782 {
1783         return (u64)wdev->identifier |
1784                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1785 }
1786
1787 static int nl80211_send_chandef(struct sk_buff *msg,
1788                                  struct cfg80211_chan_def *chandef)
1789 {
1790         WARN_ON(!cfg80211_chandef_valid(chandef));
1791
1792         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1793                         chandef->chan->center_freq))
1794                 return -ENOBUFS;
1795         switch (chandef->width) {
1796         case NL80211_CHAN_WIDTH_20_NOHT:
1797         case NL80211_CHAN_WIDTH_20:
1798         case NL80211_CHAN_WIDTH_40:
1799                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1800                                 cfg80211_get_chandef_type(chandef)))
1801                         return -ENOBUFS;
1802                 break;
1803         default:
1804                 break;
1805         }
1806         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1807                 return -ENOBUFS;
1808         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1809                 return -ENOBUFS;
1810         if (chandef->center_freq2 &&
1811             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1812                 return -ENOBUFS;
1813         return 0;
1814 }
1815
1816 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1817                               struct cfg80211_registered_device *rdev,
1818                               struct wireless_dev *wdev)
1819 {
1820         struct net_device *dev = wdev->netdev;
1821         void *hdr;
1822
1823         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1824         if (!hdr)
1825                 return -1;
1826
1827         if (dev &&
1828             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1829              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1830                 goto nla_put_failure;
1831
1832         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1833             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1834             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1835             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1836             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1837                         rdev->devlist_generation ^
1838                         (cfg80211_rdev_list_generation << 2)))
1839                 goto nla_put_failure;
1840
1841         if (rdev->ops->get_channel) {
1842                 int ret;
1843                 struct cfg80211_chan_def chandef;
1844
1845                 ret = rdev_get_channel(rdev, wdev, &chandef);
1846                 if (ret == 0) {
1847                         if (nl80211_send_chandef(msg, &chandef))
1848                                 goto nla_put_failure;
1849                 }
1850         }
1851
1852         if (wdev->ssid_len) {
1853                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1854                         goto nla_put_failure;
1855         }
1856
1857         return genlmsg_end(msg, hdr);
1858
1859  nla_put_failure:
1860         genlmsg_cancel(msg, hdr);
1861         return -EMSGSIZE;
1862 }
1863
1864 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1865 {
1866         int wp_idx = 0;
1867         int if_idx = 0;
1868         int wp_start = cb->args[0];
1869         int if_start = cb->args[1];
1870         struct cfg80211_registered_device *rdev;
1871         struct wireless_dev *wdev;
1872
1873         mutex_lock(&cfg80211_mutex);
1874         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1875                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1876                         continue;
1877                 if (wp_idx < wp_start) {
1878                         wp_idx++;
1879                         continue;
1880                 }
1881                 if_idx = 0;
1882
1883                 mutex_lock(&rdev->devlist_mtx);
1884                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1885                         if (if_idx < if_start) {
1886                                 if_idx++;
1887                                 continue;
1888                         }
1889                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1890                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1891                                                rdev, wdev) < 0) {
1892                                 mutex_unlock(&rdev->devlist_mtx);
1893                                 goto out;
1894                         }
1895                         if_idx++;
1896                 }
1897                 mutex_unlock(&rdev->devlist_mtx);
1898
1899                 wp_idx++;
1900         }
1901  out:
1902         mutex_unlock(&cfg80211_mutex);
1903
1904         cb->args[0] = wp_idx;
1905         cb->args[1] = if_idx;
1906
1907         return skb->len;
1908 }
1909
1910 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1911 {
1912         struct sk_buff *msg;
1913         struct cfg80211_registered_device *dev = info->user_ptr[0];
1914         struct wireless_dev *wdev = info->user_ptr[1];
1915
1916         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1917         if (!msg)
1918                 return -ENOMEM;
1919
1920         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1921                                dev, wdev) < 0) {
1922                 nlmsg_free(msg);
1923                 return -ENOBUFS;
1924         }
1925
1926         return genlmsg_reply(msg, info);
1927 }
1928
1929 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1930         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1931         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1932         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1933         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1934         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1935 };
1936
1937 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1938 {
1939         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1940         int flag;
1941
1942         *mntrflags = 0;
1943
1944         if (!nla)
1945                 return -EINVAL;
1946
1947         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1948                              nla, mntr_flags_policy))
1949                 return -EINVAL;
1950
1951         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1952                 if (flags[flag])
1953                         *mntrflags |= (1<<flag);
1954
1955         return 0;
1956 }
1957
1958 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1959                                struct net_device *netdev, u8 use_4addr,
1960                                enum nl80211_iftype iftype)
1961 {
1962         if (!use_4addr) {
1963                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1964                         return -EBUSY;
1965                 return 0;
1966         }
1967
1968         switch (iftype) {
1969         case NL80211_IFTYPE_AP_VLAN:
1970                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1971                         return 0;
1972                 break;
1973         case NL80211_IFTYPE_STATION:
1974                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1975                         return 0;
1976                 break;
1977         default:
1978                 break;
1979         }
1980
1981         return -EOPNOTSUPP;
1982 }
1983
1984 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1985 {
1986         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1987         struct vif_params params;
1988         int err;
1989         enum nl80211_iftype otype, ntype;
1990         struct net_device *dev = info->user_ptr[1];
1991         u32 _flags, *flags = NULL;
1992         bool change = false;
1993
1994         memset(&params, 0, sizeof(params));
1995
1996         otype = ntype = dev->ieee80211_ptr->iftype;
1997
1998         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1999                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2000                 if (otype != ntype)
2001                         change = true;
2002                 if (ntype > NL80211_IFTYPE_MAX)
2003                         return -EINVAL;
2004         }
2005
2006         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2007                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2008
2009                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2010                         return -EINVAL;
2011                 if (netif_running(dev))
2012                         return -EBUSY;
2013
2014                 wdev_lock(wdev);
2015                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2016                              IEEE80211_MAX_MESH_ID_LEN);
2017                 wdev->mesh_id_up_len =
2018                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2019                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2020                        wdev->mesh_id_up_len);
2021                 wdev_unlock(wdev);
2022         }
2023
2024         if (info->attrs[NL80211_ATTR_4ADDR]) {
2025                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2026                 change = true;
2027                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2028                 if (err)
2029                         return err;
2030         } else {
2031                 params.use_4addr = -1;
2032         }
2033
2034         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2035                 if (ntype != NL80211_IFTYPE_MONITOR)
2036                         return -EINVAL;
2037                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2038                                           &_flags);
2039                 if (err)
2040                         return err;
2041
2042                 flags = &_flags;
2043                 change = true;
2044         }
2045
2046         if (change)
2047                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2048         else
2049                 err = 0;
2050
2051         if (!err && params.use_4addr != -1)
2052                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2053
2054         return err;
2055 }
2056
2057 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2058 {
2059         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2060         struct vif_params params;
2061         struct wireless_dev *wdev;
2062         struct sk_buff *msg;
2063         int err;
2064         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2065         u32 flags;
2066
2067         memset(&params, 0, sizeof(params));
2068
2069         if (!info->attrs[NL80211_ATTR_IFNAME])
2070                 return -EINVAL;
2071
2072         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2073                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2074                 if (type > NL80211_IFTYPE_MAX)
2075                         return -EINVAL;
2076         }
2077
2078         if (!rdev->ops->add_virtual_intf ||
2079             !(rdev->wiphy.interface_modes & (1 << type)))
2080                 return -EOPNOTSUPP;
2081
2082         if (info->attrs[NL80211_ATTR_4ADDR]) {
2083                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2084                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2085                 if (err)
2086                         return err;
2087         }
2088
2089         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2090         if (!msg)
2091                 return -ENOMEM;
2092
2093         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2094                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2095                                   &flags);
2096         wdev = rdev_add_virtual_intf(rdev,
2097                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2098                                 type, err ? NULL : &flags, &params);
2099         if (IS_ERR(wdev)) {
2100                 nlmsg_free(msg);
2101                 return PTR_ERR(wdev);
2102         }
2103
2104         switch (type) {
2105         case NL80211_IFTYPE_MESH_POINT:
2106                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2107                         break;
2108                 wdev_lock(wdev);
2109                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2110                              IEEE80211_MAX_MESH_ID_LEN);
2111                 wdev->mesh_id_up_len =
2112                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2113                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2114                        wdev->mesh_id_up_len);
2115                 wdev_unlock(wdev);
2116                 break;
2117         case NL80211_IFTYPE_P2P_DEVICE:
2118                 /*
2119                  * P2P Device doesn't have a netdev, so doesn't go
2120                  * through the netdev notifier and must be added here
2121                  */
2122                 mutex_init(&wdev->mtx);
2123                 INIT_LIST_HEAD(&wdev->event_list);
2124                 spin_lock_init(&wdev->event_lock);
2125                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2126                 spin_lock_init(&wdev->mgmt_registrations_lock);
2127
2128                 mutex_lock(&rdev->devlist_mtx);
2129                 wdev->identifier = ++rdev->wdev_id;
2130                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2131                 rdev->devlist_generation++;
2132                 mutex_unlock(&rdev->devlist_mtx);
2133                 break;
2134         default:
2135                 break;
2136         }
2137
2138         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2139                                rdev, wdev) < 0) {
2140                 nlmsg_free(msg);
2141                 return -ENOBUFS;
2142         }
2143
2144         return genlmsg_reply(msg, info);
2145 }
2146
2147 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2148 {
2149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2150         struct wireless_dev *wdev = info->user_ptr[1];
2151
2152         if (!rdev->ops->del_virtual_intf)
2153                 return -EOPNOTSUPP;
2154
2155         /*
2156          * If we remove a wireless device without a netdev then clear
2157          * user_ptr[1] so that nl80211_post_doit won't dereference it
2158          * to check if it needs to do dev_put(). Otherwise it crashes
2159          * since the wdev has been freed, unlike with a netdev where
2160          * we need the dev_put() for the netdev to really be freed.
2161          */
2162         if (!wdev->netdev)
2163                 info->user_ptr[1] = NULL;
2164
2165         return rdev_del_virtual_intf(rdev, wdev);
2166 }
2167
2168 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2169 {
2170         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2171         struct net_device *dev = info->user_ptr[1];
2172         u16 noack_map;
2173
2174         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2175                 return -EINVAL;
2176
2177         if (!rdev->ops->set_noack_map)
2178                 return -EOPNOTSUPP;
2179
2180         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2181
2182         return rdev_set_noack_map(rdev, dev, noack_map);
2183 }
2184
2185 struct get_key_cookie {
2186         struct sk_buff *msg;
2187         int error;
2188         int idx;
2189 };
2190
2191 static void get_key_callback(void *c, struct key_params *params)
2192 {
2193         struct nlattr *key;
2194         struct get_key_cookie *cookie = c;
2195
2196         if ((params->key &&
2197              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2198                      params->key_len, params->key)) ||
2199             (params->seq &&
2200              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2201                      params->seq_len, params->seq)) ||
2202             (params->cipher &&
2203              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2204                          params->cipher)))
2205                 goto nla_put_failure;
2206
2207         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2208         if (!key)
2209                 goto nla_put_failure;
2210
2211         if ((params->key &&
2212              nla_put(cookie->msg, NL80211_KEY_DATA,
2213                      params->key_len, params->key)) ||
2214             (params->seq &&
2215              nla_put(cookie->msg, NL80211_KEY_SEQ,
2216                      params->seq_len, params->seq)) ||
2217             (params->cipher &&
2218              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2219                          params->cipher)))
2220                 goto nla_put_failure;
2221
2222         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2223                 goto nla_put_failure;
2224
2225         nla_nest_end(cookie->msg, key);
2226
2227         return;
2228  nla_put_failure:
2229         cookie->error = 1;
2230 }
2231
2232 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2233 {
2234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2235         int err;
2236         struct net_device *dev = info->user_ptr[1];
2237         u8 key_idx = 0;
2238         const u8 *mac_addr = NULL;
2239         bool pairwise;
2240         struct get_key_cookie cookie = {
2241                 .error = 0,
2242         };
2243         void *hdr;
2244         struct sk_buff *msg;
2245
2246         if (info->attrs[NL80211_ATTR_KEY_IDX])
2247                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2248
2249         if (key_idx > 5)
2250                 return -EINVAL;
2251
2252         if (info->attrs[NL80211_ATTR_MAC])
2253                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2254
2255         pairwise = !!mac_addr;
2256         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2257                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2258                 if (kt >= NUM_NL80211_KEYTYPES)
2259                         return -EINVAL;
2260                 if (kt != NL80211_KEYTYPE_GROUP &&
2261                     kt != NL80211_KEYTYPE_PAIRWISE)
2262                         return -EINVAL;
2263                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2264         }
2265
2266         if (!rdev->ops->get_key)
2267                 return -EOPNOTSUPP;
2268
2269         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2270         if (!msg)
2271                 return -ENOMEM;
2272
2273         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2274                              NL80211_CMD_NEW_KEY);
2275         if (IS_ERR(hdr))
2276                 return PTR_ERR(hdr);
2277
2278         cookie.msg = msg;
2279         cookie.idx = key_idx;
2280
2281         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2282             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2283                 goto nla_put_failure;
2284         if (mac_addr &&
2285             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2286                 goto nla_put_failure;
2287
2288         if (pairwise && mac_addr &&
2289             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2290                 return -ENOENT;
2291
2292         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2293                            get_key_callback);
2294
2295         if (err)
2296                 goto free_msg;
2297
2298         if (cookie.error)
2299                 goto nla_put_failure;
2300
2301         genlmsg_end(msg, hdr);
2302         return genlmsg_reply(msg, info);
2303
2304  nla_put_failure:
2305         err = -ENOBUFS;
2306  free_msg:
2307         nlmsg_free(msg);
2308         return err;
2309 }
2310
2311 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2312 {
2313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2314         struct key_parse key;
2315         int err;
2316         struct net_device *dev = info->user_ptr[1];
2317
2318         err = nl80211_parse_key(info, &key);
2319         if (err)
2320                 return err;
2321
2322         if (key.idx < 0)
2323                 return -EINVAL;
2324
2325         /* only support setting default key */
2326         if (!key.def && !key.defmgmt)
2327                 return -EINVAL;
2328
2329         wdev_lock(dev->ieee80211_ptr);
2330
2331         if (key.def) {
2332                 if (!rdev->ops->set_default_key) {
2333                         err = -EOPNOTSUPP;
2334                         goto out;
2335                 }
2336
2337                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2338                 if (err)
2339                         goto out;
2340
2341                 err = rdev_set_default_key(rdev, dev, key.idx,
2342                                                  key.def_uni, key.def_multi);
2343
2344                 if (err)
2345                         goto out;
2346
2347 #ifdef CONFIG_CFG80211_WEXT
2348                 dev->ieee80211_ptr->wext.default_key = key.idx;
2349 #endif
2350         } else {
2351                 if (key.def_uni || !key.def_multi) {
2352                         err = -EINVAL;
2353                         goto out;
2354                 }
2355
2356                 if (!rdev->ops->set_default_mgmt_key) {
2357                         err = -EOPNOTSUPP;
2358                         goto out;
2359                 }
2360
2361                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2362                 if (err)
2363                         goto out;
2364
2365                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2366                 if (err)
2367                         goto out;
2368
2369 #ifdef CONFIG_CFG80211_WEXT
2370                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2371 #endif
2372         }
2373
2374  out:
2375         wdev_unlock(dev->ieee80211_ptr);
2376
2377         return err;
2378 }
2379
2380 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2381 {
2382         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2383         int err;
2384         struct net_device *dev = info->user_ptr[1];
2385         struct key_parse key;
2386         const u8 *mac_addr = NULL;
2387
2388         err = nl80211_parse_key(info, &key);
2389         if (err)
2390                 return err;
2391
2392         if (!key.p.key)
2393                 return -EINVAL;
2394
2395         if (info->attrs[NL80211_ATTR_MAC])
2396                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2397
2398         if (key.type == -1) {
2399                 if (mac_addr)
2400                         key.type = NL80211_KEYTYPE_PAIRWISE;
2401                 else
2402                         key.type = NL80211_KEYTYPE_GROUP;
2403         }
2404
2405         /* for now */
2406         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2407             key.type != NL80211_KEYTYPE_GROUP)
2408                 return -EINVAL;
2409
2410         if (!rdev->ops->add_key)
2411                 return -EOPNOTSUPP;
2412
2413         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2414                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2415                                            mac_addr))
2416                 return -EINVAL;
2417
2418         wdev_lock(dev->ieee80211_ptr);
2419         err = nl80211_key_allowed(dev->ieee80211_ptr);
2420         if (!err)
2421                 err = rdev_add_key(rdev, dev, key.idx,
2422                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2423                                     mac_addr, &key.p);
2424         wdev_unlock(dev->ieee80211_ptr);
2425
2426         return err;
2427 }
2428
2429 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2430 {
2431         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2432         int err;
2433         struct net_device *dev = info->user_ptr[1];
2434         u8 *mac_addr = NULL;
2435         struct key_parse key;
2436
2437         err = nl80211_parse_key(info, &key);
2438         if (err)
2439                 return err;
2440
2441         if (info->attrs[NL80211_ATTR_MAC])
2442                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2443
2444         if (key.type == -1) {
2445                 if (mac_addr)
2446                         key.type = NL80211_KEYTYPE_PAIRWISE;
2447                 else
2448                         key.type = NL80211_KEYTYPE_GROUP;
2449         }
2450
2451         /* for now */
2452         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2453             key.type != NL80211_KEYTYPE_GROUP)
2454                 return -EINVAL;
2455
2456         if (!rdev->ops->del_key)
2457                 return -EOPNOTSUPP;
2458
2459         wdev_lock(dev->ieee80211_ptr);
2460         err = nl80211_key_allowed(dev->ieee80211_ptr);
2461
2462         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2463             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2464                 err = -ENOENT;
2465
2466         if (!err)
2467                 err = rdev_del_key(rdev, dev, key.idx,
2468                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2469                                    mac_addr);
2470
2471 #ifdef CONFIG_CFG80211_WEXT
2472         if (!err) {
2473                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2474                         dev->ieee80211_ptr->wext.default_key = -1;
2475                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2476                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2477         }
2478 #endif
2479         wdev_unlock(dev->ieee80211_ptr);
2480
2481         return err;
2482 }
2483
2484 static int nl80211_parse_beacon(struct genl_info *info,
2485                                 struct cfg80211_beacon_data *bcn)
2486 {
2487         bool haveinfo = false;
2488
2489         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2490             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2491             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2492             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2493                 return -EINVAL;
2494
2495         memset(bcn, 0, sizeof(*bcn));
2496
2497         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2498                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2499                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2500                 if (!bcn->head_len)
2501                         return -EINVAL;
2502                 haveinfo = true;
2503         }
2504
2505         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2506                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2507                 bcn->tail_len =
2508                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2509                 haveinfo = true;
2510         }
2511
2512         if (!haveinfo)
2513                 return -EINVAL;
2514
2515         if (info->attrs[NL80211_ATTR_IE]) {
2516                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2517                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2518         }
2519
2520         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2521                 bcn->proberesp_ies =
2522                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2523                 bcn->proberesp_ies_len =
2524                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2525         }
2526
2527         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2528                 bcn->assocresp_ies =
2529                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2530                 bcn->assocresp_ies_len =
2531                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2532         }
2533
2534         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2535                 bcn->probe_resp =
2536                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2537                 bcn->probe_resp_len =
2538                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2539         }
2540
2541         return 0;
2542 }
2543
2544 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2545                                    struct cfg80211_ap_settings *params)
2546 {
2547         struct wireless_dev *wdev;
2548         bool ret = false;
2549
2550         mutex_lock(&rdev->devlist_mtx);
2551
2552         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2553                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2554                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2555                         continue;
2556
2557                 if (!wdev->preset_chandef.chan)
2558                         continue;
2559
2560                 params->chandef = wdev->preset_chandef;
2561                 ret = true;
2562                 break;
2563         }
2564
2565         mutex_unlock(&rdev->devlist_mtx);
2566
2567         return ret;
2568 }
2569
2570 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2571                                     enum nl80211_auth_type auth_type,
2572                                     enum nl80211_commands cmd)
2573 {
2574         if (auth_type > NL80211_AUTHTYPE_MAX)
2575                 return false;
2576
2577         switch (cmd) {
2578         case NL80211_CMD_AUTHENTICATE:
2579                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2580                     auth_type == NL80211_AUTHTYPE_SAE)
2581                         return false;
2582                 return true;
2583         case NL80211_CMD_CONNECT:
2584         case NL80211_CMD_START_AP:
2585                 /* SAE not supported yet */
2586                 if (auth_type == NL80211_AUTHTYPE_SAE)
2587                         return false;
2588                 return true;
2589         default:
2590                 return false;
2591         }
2592 }
2593
2594 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2595 {
2596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2597         struct net_device *dev = info->user_ptr[1];
2598         struct wireless_dev *wdev = dev->ieee80211_ptr;
2599         struct cfg80211_ap_settings params;
2600         int err;
2601
2602         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2603             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2604                 return -EOPNOTSUPP;
2605
2606         if (!rdev->ops->start_ap)
2607                 return -EOPNOTSUPP;
2608
2609         if (wdev->beacon_interval)
2610                 return -EALREADY;
2611
2612         memset(&params, 0, sizeof(params));
2613
2614         /* these are required for START_AP */
2615         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2616             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2617             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2618                 return -EINVAL;
2619
2620         err = nl80211_parse_beacon(info, &params.beacon);
2621         if (err)
2622                 return err;
2623
2624         params.beacon_interval =
2625                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2626         params.dtim_period =
2627                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2628
2629         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2630         if (err)
2631                 return err;
2632
2633         /*
2634          * In theory, some of these attributes should be required here
2635          * but since they were not used when the command was originally
2636          * added, keep them optional for old user space programs to let
2637          * them continue to work with drivers that do not need the
2638          * additional information -- drivers must check!
2639          */
2640         if (info->attrs[NL80211_ATTR_SSID]) {
2641                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2642                 params.ssid_len =
2643                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2644                 if (params.ssid_len == 0 ||
2645                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2646                         return -EINVAL;
2647         }
2648
2649         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2650                 params.hidden_ssid = nla_get_u32(
2651                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2652                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2653                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2654                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2655                         return -EINVAL;
2656         }
2657
2658         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2659
2660         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2661                 params.auth_type = nla_get_u32(
2662                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2663                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2664                                              NL80211_CMD_START_AP))
2665                         return -EINVAL;
2666         } else
2667                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2668
2669         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2670                                       NL80211_MAX_NR_CIPHER_SUITES);
2671         if (err)
2672                 return err;
2673
2674         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2675                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2676                         return -EOPNOTSUPP;
2677                 params.inactivity_timeout = nla_get_u16(
2678                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2679         }
2680
2681         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
2682                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2683                         return -EINVAL;
2684                 params.p2p_ctwindow =
2685                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
2686                 if (params.p2p_ctwindow > 127)
2687                         return -EINVAL;
2688                 if (params.p2p_ctwindow != 0 &&
2689                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
2690                         return -EINVAL;
2691         }
2692
2693         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
2694                 u8 tmp;
2695
2696                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2697                         return -EINVAL;
2698                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
2699                 if (tmp > 1)
2700                         return -EINVAL;
2701                 params.p2p_opp_ps = tmp;
2702                 if (params.p2p_opp_ps != 0 &&
2703                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
2704                         return -EINVAL;
2705         }
2706
2707         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2708                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2709                 if (err)
2710                         return err;
2711         } else if (wdev->preset_chandef.chan) {
2712                 params.chandef = wdev->preset_chandef;
2713         } else if (!nl80211_get_ap_channel(rdev, &params))
2714                 return -EINVAL;
2715
2716         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2717                 return -EINVAL;
2718
2719         mutex_lock(&rdev->devlist_mtx);
2720         err = cfg80211_can_use_chan(rdev, wdev, params.chandef.chan,
2721                                     CHAN_MODE_SHARED);
2722         mutex_unlock(&rdev->devlist_mtx);
2723
2724         if (err)
2725                 return err;
2726
2727         err = rdev_start_ap(rdev, dev, &params);
2728         if (!err) {
2729                 wdev->preset_chandef = params.chandef;
2730                 wdev->beacon_interval = params.beacon_interval;
2731                 wdev->channel = params.chandef.chan;
2732                 wdev->ssid_len = params.ssid_len;
2733                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2734         }
2735         return err;
2736 }
2737
2738 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2739 {
2740         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2741         struct net_device *dev = info->user_ptr[1];
2742         struct wireless_dev *wdev = dev->ieee80211_ptr;
2743         struct cfg80211_beacon_data params;
2744         int err;
2745
2746         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2747             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2748                 return -EOPNOTSUPP;
2749
2750         if (!rdev->ops->change_beacon)
2751                 return -EOPNOTSUPP;
2752
2753         if (!wdev->beacon_interval)
2754                 return -EINVAL;
2755
2756         err = nl80211_parse_beacon(info, &params);
2757         if (err)
2758                 return err;
2759
2760         return rdev_change_beacon(rdev, dev, &params);
2761 }
2762
2763 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2764 {
2765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2766         struct net_device *dev = info->user_ptr[1];
2767
2768         return cfg80211_stop_ap(rdev, dev);
2769 }
2770
2771 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2772         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2773         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2774         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2775         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2776         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2777         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2778 };
2779
2780 static int parse_station_flags(struct genl_info *info,
2781                                enum nl80211_iftype iftype,
2782                                struct station_parameters *params)
2783 {
2784         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2785         struct nlattr *nla;
2786         int flag;
2787
2788         /*
2789          * Try parsing the new attribute first so userspace
2790          * can specify both for older kernels.
2791          */
2792         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2793         if (nla) {
2794                 struct nl80211_sta_flag_update *sta_flags;
2795
2796                 sta_flags = nla_data(nla);
2797                 params->sta_flags_mask = sta_flags->mask;
2798                 params->sta_flags_set = sta_flags->set;
2799                 if ((params->sta_flags_mask |
2800                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2801                         return -EINVAL;
2802                 return 0;
2803         }
2804
2805         /* if present, parse the old attribute */
2806
2807         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2808         if (!nla)
2809                 return 0;
2810
2811         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2812                              nla, sta_flags_policy))
2813                 return -EINVAL;
2814
2815         /*
2816          * Only allow certain flags for interface types so that
2817          * other attributes are silently ignored. Remember that
2818          * this is backward compatibility code with old userspace
2819          * and shouldn't be hit in other cases anyway.
2820          */
2821         switch (iftype) {
2822         case NL80211_IFTYPE_AP:
2823         case NL80211_IFTYPE_AP_VLAN:
2824         case NL80211_IFTYPE_P2P_GO:
2825                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2826                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2827                                          BIT(NL80211_STA_FLAG_WME) |
2828                                          BIT(NL80211_STA_FLAG_MFP);
2829                 break;
2830         case NL80211_IFTYPE_P2P_CLIENT:
2831         case NL80211_IFTYPE_STATION:
2832                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2833                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2834                 break;
2835         case NL80211_IFTYPE_MESH_POINT:
2836                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2837                                          BIT(NL80211_STA_FLAG_MFP) |
2838                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2839         default:
2840                 return -EINVAL;
2841         }
2842
2843         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2844                 if (flags[flag]) {
2845                         params->sta_flags_set |= (1<<flag);
2846
2847                         /* no longer support new API additions in old API */
2848                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2849                                 return -EINVAL;
2850                 }
2851         }
2852
2853         return 0;
2854 }
2855
2856 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2857                                  int attr)
2858 {
2859         struct nlattr *rate;
2860         u32 bitrate;
2861         u16 bitrate_compat;
2862
2863         rate = nla_nest_start(msg, attr);
2864         if (!rate)
2865                 return false;
2866
2867         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2868         bitrate = cfg80211_calculate_bitrate(info);
2869         /* report 16-bit bitrate only if we can */
2870         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2871         if (bitrate > 0 &&
2872             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
2873                 return false;
2874         if (bitrate_compat > 0 &&
2875             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
2876                 return false;
2877
2878         if (info->flags & RATE_INFO_FLAGS_MCS) {
2879                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
2880                         return false;
2881                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2882                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2883                         return false;
2884                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2885                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2886                         return false;
2887         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
2888                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
2889                         return false;
2890                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
2891                         return false;
2892                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2893                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2894                         return false;
2895                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
2896                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
2897                         return false;
2898                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
2899                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
2900                         return false;
2901                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
2902                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
2903                         return false;
2904                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2905                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2906                         return false;
2907         }
2908
2909         nla_nest_end(msg, rate);
2910         return true;
2911 }
2912
2913 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
2914                                 int flags,
2915                                 struct cfg80211_registered_device *rdev,
2916                                 struct net_device *dev,
2917                                 const u8 *mac_addr, struct station_info *sinfo)
2918 {
2919         void *hdr;
2920         struct nlattr *sinfoattr, *bss_param;
2921
2922         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
2923         if (!hdr)
2924                 return -1;
2925
2926         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2927             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2928             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2929                 goto nla_put_failure;
2930
2931         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2932         if (!sinfoattr)
2933                 goto nla_put_failure;
2934         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2935             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2936                         sinfo->connected_time))
2937                 goto nla_put_failure;
2938         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2939             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2940                         sinfo->inactive_time))
2941                 goto nla_put_failure;
2942         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2943             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2944                         sinfo->rx_bytes))
2945                 goto nla_put_failure;
2946         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2947             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2948                         sinfo->tx_bytes))
2949                 goto nla_put_failure;
2950         if ((sinfo->filled & STATION_INFO_LLID) &&
2951             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2952                 goto nla_put_failure;
2953         if ((sinfo->filled & STATION_INFO_PLID) &&
2954             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2955                 goto nla_put_failure;
2956         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2957             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2958                        sinfo->plink_state))
2959                 goto nla_put_failure;
2960         switch (rdev->wiphy.signal_type) {
2961         case CFG80211_SIGNAL_TYPE_MBM:
2962                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2963                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2964                                sinfo->signal))
2965                         goto nla_put_failure;
2966                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2967                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2968                                sinfo->signal_avg))
2969                         goto nla_put_failure;
2970                 break;
2971         default:
2972                 break;
2973         }
2974         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2975                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2976                                           NL80211_STA_INFO_TX_BITRATE))
2977                         goto nla_put_failure;
2978         }
2979         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2980                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2981                                           NL80211_STA_INFO_RX_BITRATE))
2982                         goto nla_put_failure;
2983         }
2984         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2985             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2986                         sinfo->rx_packets))
2987                 goto nla_put_failure;
2988         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2989             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2990                         sinfo->tx_packets))
2991                 goto nla_put_failure;
2992         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2993             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2994                         sinfo->tx_retries))
2995                 goto nla_put_failure;
2996         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2997             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2998                         sinfo->tx_failed))
2999                 goto nla_put_failure;
3000         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3001             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3002                         sinfo->beacon_loss_count))
3003                 goto nla_put_failure;
3004         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3005                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3006                 if (!bss_param)
3007                         goto nla_put_failure;
3008
3009                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3010                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3011                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3012                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3013                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3014                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3015                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3016                                sinfo->bss_param.dtim_period) ||
3017                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3018                                 sinfo->bss_param.beacon_interval))
3019                         goto nla_put_failure;
3020
3021                 nla_nest_end(msg, bss_param);
3022         }
3023         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3024             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3025                     sizeof(struct nl80211_sta_flag_update),
3026                     &sinfo->sta_flags))
3027                 goto nla_put_failure;
3028         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3029                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3030                             sinfo->t_offset))
3031                 goto nla_put_failure;
3032         nla_nest_end(msg, sinfoattr);
3033
3034         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3035             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3036                     sinfo->assoc_req_ies))
3037                 goto nla_put_failure;
3038
3039         return genlmsg_end(msg, hdr);
3040
3041  nla_put_failure:
3042         genlmsg_cancel(msg, hdr);
3043         return -EMSGSIZE;
3044 }
3045
3046 static int nl80211_dump_station(struct sk_buff *skb,
3047                                 struct netlink_callback *cb)
3048 {
3049         struct station_info sinfo;
3050         struct cfg80211_registered_device *dev;
3051         struct net_device *netdev;
3052         u8 mac_addr[ETH_ALEN];
3053         int sta_idx = cb->args[1];
3054         int err;
3055
3056         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3057         if (err)
3058                 return err;
3059
3060         if (!dev->ops->dump_station) {
3061                 err = -EOPNOTSUPP;
3062                 goto out_err;
3063         }
3064
3065         while (1) {
3066                 memset(&sinfo, 0, sizeof(sinfo));
3067                 err = rdev_dump_station(dev, netdev, sta_idx,
3068                                         mac_addr, &sinfo);
3069                 if (err == -ENOENT)
3070                         break;
3071                 if (err)
3072                         goto out_err;
3073
3074                 if (nl80211_send_station(skb,
3075                                 NETLINK_CB(cb->skb).portid,
3076                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3077                                 dev, netdev, mac_addr,
3078                                 &sinfo) < 0)
3079                         goto out;
3080
3081                 sta_idx++;
3082         }
3083
3084
3085  out:
3086         cb->args[1] = sta_idx;
3087         err = skb->len;
3088  out_err:
3089         nl80211_finish_netdev_dump(dev);
3090
3091         return err;
3092 }
3093
3094 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3095 {
3096         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3097         struct net_device *dev = info->user_ptr[1];
3098         struct station_info sinfo;
3099         struct sk_buff *msg;
3100         u8 *mac_addr = NULL;
3101         int err;
3102
3103         memset(&sinfo, 0, sizeof(sinfo));
3104
3105         if (!info->attrs[NL80211_ATTR_MAC])
3106                 return -EINVAL;
3107
3108         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3109
3110         if (!rdev->ops->get_station)
3111                 return -EOPNOTSUPP;
3112
3113         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3114         if (err)
3115                 return err;
3116
3117         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3118         if (!msg)
3119                 return -ENOMEM;
3120
3121         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3122                                  rdev, dev, mac_addr, &sinfo) < 0) {
3123                 nlmsg_free(msg);
3124                 return -ENOBUFS;
3125         }
3126
3127         return genlmsg_reply(msg, info);
3128 }
3129
3130 /*
3131  * Get vlan interface making sure it is running and on the right wiphy.
3132  */
3133 static struct net_device *get_vlan(struct genl_info *info,
3134                                    struct cfg80211_registered_device *rdev)
3135 {
3136         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3137         struct net_device *v;
3138         int ret;
3139
3140         if (!vlanattr)
3141                 return NULL;
3142
3143         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3144         if (!v)
3145                 return ERR_PTR(-ENODEV);
3146
3147         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3148                 ret = -EINVAL;
3149                 goto error;
3150         }
3151
3152         if (!netif_running(v)) {
3153                 ret = -ENETDOWN;
3154                 goto error;
3155         }
3156
3157         return v;
3158  error:
3159         dev_put(v);
3160         return ERR_PTR(ret);
3161 }
3162
3163 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3164 {
3165         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3166         int err;
3167         struct net_device *dev = info->user_ptr[1];
3168         struct station_parameters params;
3169         u8 *mac_addr = NULL;
3170
3171         memset(&params, 0, sizeof(params));
3172
3173         params.listen_interval = -1;
3174         params.plink_state = -1;
3175
3176         if (info->attrs[NL80211_ATTR_STA_AID])
3177                 return -EINVAL;
3178
3179         if (!info->attrs[NL80211_ATTR_MAC])
3180                 return -EINVAL;
3181
3182         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3183
3184         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3185                 params.supported_rates =
3186                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3187                 params.supported_rates_len =
3188                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3189         }
3190
3191         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3192                 params.listen_interval =
3193                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3194
3195         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3196                 params.ht_capa =
3197                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3198
3199         if (!rdev->ops->change_station)
3200                 return -EOPNOTSUPP;
3201
3202         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3203                 return -EINVAL;
3204
3205         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3206                 params.plink_action =
3207                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3208
3209         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3210                 params.plink_state =
3211                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3212
3213         switch (dev->ieee80211_ptr->iftype) {
3214         case NL80211_IFTYPE_AP:
3215         case NL80211_IFTYPE_AP_VLAN:
3216         case NL80211_IFTYPE_P2P_GO:
3217                 /* disallow mesh-specific things */
3218                 if (params.plink_action)
3219                         return -EINVAL;
3220
3221                 /* TDLS can't be set, ... */
3222                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3223                         return -EINVAL;
3224                 /*
3225                  * ... but don't bother the driver with it. This works around
3226                  * a hostapd/wpa_supplicant issue -- it always includes the
3227                  * TLDS_PEER flag in the mask even for AP mode.
3228                  */
3229                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3230
3231                 /* accept only the listed bits */
3232                 if (params.sta_flags_mask &
3233                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3234                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3235                                   BIT(NL80211_STA_FLAG_WME) |
3236                                   BIT(NL80211_STA_FLAG_MFP)))
3237                         return -EINVAL;
3238
3239                 /* must be last in here for error handling */
3240                 params.vlan = get_vlan(info, rdev);
3241                 if (IS_ERR(params.vlan))
3242                         return PTR_ERR(params.vlan);
3243                 break;
3244         case NL80211_IFTYPE_P2P_CLIENT:
3245         case NL80211_IFTYPE_STATION:
3246                 /*
3247                  * Don't allow userspace to change the TDLS_PEER flag,
3248                  * but silently ignore attempts to change it since we
3249                  * don't have state here to verify that it doesn't try
3250                  * to change the flag.
3251                  */
3252                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3253                 /* fall through */
3254         case NL80211_IFTYPE_ADHOC:
3255                 /* disallow things sta doesn't support */
3256                 if (params.plink_action)
3257                         return -EINVAL;
3258                 if (params.ht_capa)
3259                         return -EINVAL;
3260                 if (params.listen_interval >= 0)
3261                         return -EINVAL;
3262                 /* reject any changes other than AUTHORIZED */
3263                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3264                         return -EINVAL;
3265                 break;
3266         case NL80211_IFTYPE_MESH_POINT:
3267                 /* disallow things mesh doesn't support */
3268                 if (params.vlan)
3269                         return -EINVAL;
3270                 if (params.ht_capa)
3271                         return -EINVAL;
3272                 if (params.listen_interval >= 0)
3273                         return -EINVAL;
3274                 /*
3275                  * No special handling for TDLS here -- the userspace
3276                  * mesh code doesn't have this bug.
3277                  */
3278                 if (params.sta_flags_mask &
3279                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3280                                   BIT(NL80211_STA_FLAG_MFP) |
3281                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3282                         return -EINVAL;
3283                 break;
3284         default:
3285                 return -EOPNOTSUPP;
3286         }
3287
3288         /* be aware of params.vlan when changing code here */
3289
3290         err = rdev_change_station(rdev, dev, mac_addr, &params);
3291
3292         if (params.vlan)
3293                 dev_put(params.vlan);
3294
3295         return err;
3296 }
3297
3298 static struct nla_policy
3299 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3300         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3301         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3302 };
3303
3304 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3305 {
3306         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3307         int err;
3308         struct net_device *dev = info->user_ptr[1];
3309         struct station_parameters params;
3310         u8 *mac_addr = NULL;
3311
3312         memset(&params, 0, sizeof(params));
3313
3314         if (!info->attrs[NL80211_ATTR_MAC])
3315                 return -EINVAL;
3316
3317         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3318                 return -EINVAL;
3319
3320         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3321                 return -EINVAL;
3322
3323         if (!info->attrs[NL80211_ATTR_STA_AID])
3324                 return -EINVAL;
3325
3326         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3327         params.supported_rates =
3328                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3329         params.supported_rates_len =
3330                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3331         params.listen_interval =
3332                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3333
3334         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3335         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3336                 return -EINVAL;
3337
3338         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3339                 params.ht_capa =
3340                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3341
3342         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3343                 params.vht_capa =
3344                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3345
3346         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3347                 params.plink_action =
3348                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3349
3350         if (!rdev->ops->add_station)
3351                 return -EOPNOTSUPP;
3352
3353         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3354                 return -EINVAL;
3355
3356         switch (dev->ieee80211_ptr->iftype) {
3357         case NL80211_IFTYPE_AP:
3358         case NL80211_IFTYPE_AP_VLAN:
3359         case NL80211_IFTYPE_P2P_GO:
3360                 /* parse WME attributes if sta is WME capable */
3361                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3362                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3363                     info->attrs[NL80211_ATTR_STA_WME]) {
3364                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3365                         struct nlattr *nla;
3366
3367                         nla = info->attrs[NL80211_ATTR_STA_WME];
3368                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3369                                                nl80211_sta_wme_policy);
3370                         if (err)
3371                                 return err;
3372
3373                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3374                                 params.uapsd_queues =
3375                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3376                         if (params.uapsd_queues &
3377                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3378                                 return -EINVAL;
3379
3380                         if (tb[NL80211_STA_WME_MAX_SP])
3381                                 params.max_sp =
3382                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3383
3384                         if (params.max_sp &
3385                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3386                                 return -EINVAL;
3387
3388                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3389                 }
3390                 /* TDLS peers cannot be added */
3391                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3392                         return -EINVAL;
3393                 /* but don't bother the driver with it */
3394                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3395
3396                 /* must be last in here for error handling */
3397                 params.vlan = get_vlan(info, rdev);
3398                 if (IS_ERR(params.vlan))
3399                         return PTR_ERR(params.vlan);
3400                 break;
3401         case NL80211_IFTYPE_MESH_POINT:
3402                 /* TDLS peers cannot be added */
3403                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3404                         return -EINVAL;
3405                 break;
3406         case NL80211_IFTYPE_STATION:
3407                 /* Only TDLS peers can be added */
3408                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3409                         return -EINVAL;
3410                 /* Can only add if TDLS ... */
3411                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3412                         return -EOPNOTSUPP;
3413                 /* ... with external setup is supported */
3414                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3415                         return -EOPNOTSUPP;
3416                 break;
3417         default:
3418                 return -EOPNOTSUPP;
3419         }
3420
3421         /* be aware of params.vlan when changing code here */
3422
3423         err = rdev_add_station(rdev, dev, mac_addr, &params);
3424
3425         if (params.vlan)
3426                 dev_put(params.vlan);
3427         return err;
3428 }
3429
3430 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3431 {
3432         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3433         struct net_device *dev = info->user_ptr[1];
3434         u8 *mac_addr = NULL;
3435
3436         if (info->attrs[NL80211_ATTR_MAC])
3437                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3438
3439         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3440             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3441             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3442             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3443                 return -EINVAL;
3444
3445         if (!rdev->ops->del_station)
3446                 return -EOPNOTSUPP;
3447
3448         return rdev_del_station(rdev, dev, mac_addr);
3449 }
3450
3451 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3452                                 int flags, struct net_device *dev,
3453                                 u8 *dst, u8 *next_hop,
3454                                 struct mpath_info *pinfo)
3455 {
3456         void *hdr;
3457         struct nlattr *pinfoattr;
3458
3459         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3460         if (!hdr)
3461                 return -1;
3462
3463         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3464             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3465             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3466             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3467                 goto nla_put_failure;
3468
3469         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3470         if (!pinfoattr)
3471                 goto nla_put_failure;
3472         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3473             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3474                         pinfo->frame_qlen))
3475                 goto nla_put_failure;
3476         if (((pinfo->filled & MPATH_INFO_SN) &&
3477              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3478             ((pinfo->filled & MPATH_INFO_METRIC) &&
3479              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3480                          pinfo->metric)) ||
3481             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3482              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3483                          pinfo->exptime)) ||
3484             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3485              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3486                         pinfo->flags)) ||
3487             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3488              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3489                          pinfo->discovery_timeout)) ||
3490             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3491              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3492                         pinfo->discovery_retries)))
3493                 goto nla_put_failure;
3494
3495         nla_nest_end(msg, pinfoattr);
3496
3497         return genlmsg_end(msg, hdr);
3498
3499  nla_put_failure:
3500         genlmsg_cancel(msg, hdr);
3501         return -EMSGSIZE;
3502 }
3503
3504 static int nl80211_dump_mpath(struct sk_buff *skb,
3505                               struct netlink_callback *cb)
3506 {
3507         struct mpath_info pinfo;
3508         struct cfg80211_registered_device *dev;
3509         struct net_device *netdev;
3510         u8 dst[ETH_ALEN];
3511         u8 next_hop[ETH_ALEN];
3512         int path_idx = cb->args[1];
3513         int err;
3514
3515         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3516         if (err)
3517                 return err;
3518
3519         if (!dev->ops->dump_mpath) {
3520                 err = -EOPNOTSUPP;
3521                 goto out_err;
3522         }
3523
3524         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3525                 err = -EOPNOTSUPP;
3526                 goto out_err;
3527         }
3528
3529         while (1) {
3530                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3531                                       &pinfo);
3532                 if (err == -ENOENT)
3533                         break;
3534                 if (err)
3535                         goto out_err;
3536
3537                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3538                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3539                                        netdev, dst, next_hop,
3540                                        &pinfo) < 0)
3541                         goto out;
3542
3543                 path_idx++;
3544         }
3545
3546
3547  out:
3548         cb->args[1] = path_idx;
3549         err = skb->len;
3550  out_err:
3551         nl80211_finish_netdev_dump(dev);
3552         return err;
3553 }
3554
3555 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3556 {
3557         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3558         int err;
3559         struct net_device *dev = info->user_ptr[1];
3560         struct mpath_info pinfo;
3561         struct sk_buff *msg;
3562         u8 *dst = NULL;
3563         u8 next_hop[ETH_ALEN];
3564
3565         memset(&pinfo, 0, sizeof(pinfo));
3566
3567         if (!info->attrs[NL80211_ATTR_MAC])
3568                 return -EINVAL;
3569
3570         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3571
3572         if (!rdev->ops->get_mpath)
3573                 return -EOPNOTSUPP;
3574
3575         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3576                 return -EOPNOTSUPP;
3577
3578         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3579         if (err)
3580                 return err;
3581
3582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3583         if (!msg)
3584                 return -ENOMEM;
3585
3586         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3587                                  dev, dst, next_hop, &pinfo) < 0) {
3588                 nlmsg_free(msg);
3589                 return -ENOBUFS;
3590         }
3591
3592         return genlmsg_reply(msg, info);
3593 }
3594
3595 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3596 {
3597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3598         struct net_device *dev = info->user_ptr[1];
3599         u8 *dst = NULL;
3600         u8 *next_hop = NULL;
3601
3602         if (!info->attrs[NL80211_ATTR_MAC])
3603                 return -EINVAL;
3604
3605         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3606                 return -EINVAL;
3607
3608         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3609         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3610
3611         if (!rdev->ops->change_mpath)
3612                 return -EOPNOTSUPP;
3613
3614         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3615                 return -EOPNOTSUPP;
3616
3617         return rdev_change_mpath(rdev, dev, dst, next_hop);
3618 }
3619
3620 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3621 {
3622         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3623         struct net_device *dev = info->user_ptr[1];
3624         u8 *dst = NULL;
3625         u8 *next_hop = NULL;
3626
3627         if (!info->attrs[NL80211_ATTR_MAC])
3628                 return -EINVAL;
3629
3630         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3631                 return -EINVAL;
3632
3633         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3634         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3635
3636         if (!rdev->ops->add_mpath)
3637                 return -EOPNOTSUPP;
3638
3639         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3640                 return -EOPNOTSUPP;
3641
3642         return rdev_add_mpath(rdev, dev, dst, next_hop);
3643 }
3644
3645 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3646 {
3647         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3648         struct net_device *dev = info->user_ptr[1];
3649         u8 *dst = NULL;
3650
3651         if (info->attrs[NL80211_ATTR_MAC])
3652                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3653
3654         if (!rdev->ops->del_mpath)
3655                 return -EOPNOTSUPP;
3656
3657         return rdev_del_mpath(rdev, dev, dst);
3658 }
3659
3660 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3661 {
3662         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3663         struct net_device *dev = info->user_ptr[1];
3664         struct bss_parameters params;
3665
3666         memset(&params, 0, sizeof(params));
3667         /* default to not changing parameters */
3668         params.use_cts_prot = -1;
3669         params.use_short_preamble = -1;
3670         params.use_short_slot_time = -1;
3671         params.ap_isolate = -1;
3672         params.ht_opmode = -1;
3673         params.p2p_ctwindow = -1;
3674         params.p2p_opp_ps = -1;
3675
3676         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3677                 params.use_cts_prot =
3678                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3679         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3680                 params.use_short_preamble =
3681                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3682         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3683                 params.use_short_slot_time =
3684                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3685         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3686                 params.basic_rates =
3687                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3688                 params.basic_rates_len =
3689                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3690         }
3691         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3692                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3693         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3694                 params.ht_opmode =
3695                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3696
3697         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3698                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3699                         return -EINVAL;
3700                 params.p2p_ctwindow =
3701                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3702                 if (params.p2p_ctwindow < 0)
3703                         return -EINVAL;
3704                 if (params.p2p_ctwindow != 0 &&
3705                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3706                         return -EINVAL;
3707         }
3708
3709         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3710                 u8 tmp;
3711
3712                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3713                         return -EINVAL;
3714                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3715                 if (tmp > 1)
3716                         return -EINVAL;
3717                 params.p2p_opp_ps = tmp;
3718                 if (params.p2p_opp_ps &&
3719                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3720                         return -EINVAL;
3721         }
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 > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6539                 return -EINVAL;
6540
6541         wdev = dev->ieee80211_ptr;
6542
6543         if (!rdev->ops->set_cqm_txe_config)
6544                 return -EOPNOTSUPP;
6545
6546         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6547             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6548                 return -EOPNOTSUPP;
6549
6550         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6551 }
6552
6553 static int nl80211_set_cqm_rssi(struct genl_info *info,
6554                                 s32 threshold, u32 hysteresis)
6555 {
6556         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6557         struct wireless_dev *wdev;
6558         struct net_device *dev = info->user_ptr[1];
6559
6560         if (threshold > 0)
6561                 return -EINVAL;
6562
6563         wdev = dev->ieee80211_ptr;
6564
6565         if (!rdev->ops->set_cqm_rssi_config)
6566                 return -EOPNOTSUPP;
6567
6568         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6569             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6570                 return -EOPNOTSUPP;
6571
6572         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6573 }
6574
6575 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6576 {
6577         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6578         struct nlattr *cqm;
6579         int err;
6580
6581         cqm = info->attrs[NL80211_ATTR_CQM];
6582         if (!cqm) {
6583                 err = -EINVAL;
6584                 goto out;
6585         }
6586
6587         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6588                                nl80211_attr_cqm_policy);
6589         if (err)
6590                 goto out;
6591
6592         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6593             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6594                 s32 threshold;
6595                 u32 hysteresis;
6596                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6597                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6598                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6599         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
6600                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
6601                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
6602                 u32 rate, pkts, intvl;
6603                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
6604                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
6605                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
6606                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
6607         } else
6608                 err = -EINVAL;
6609
6610 out:
6611         return err;
6612 }
6613
6614 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6615 {
6616         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6617         struct net_device *dev = info->user_ptr[1];
6618         struct mesh_config cfg;
6619         struct mesh_setup setup;
6620         int err;
6621
6622         /* start with default */
6623         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6624         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6625
6626         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6627                 /* and parse parameters if given */
6628                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6629                 if (err)
6630                         return err;
6631         }
6632
6633         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6634             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6635                 return -EINVAL;
6636
6637         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6638         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6639
6640         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6641             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6642                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6643                         return -EINVAL;
6644
6645         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6646                 /* parse additional setup parameters if given */
6647                 err = nl80211_parse_mesh_setup(info, &setup);
6648                 if (err)
6649                         return err;
6650         }
6651
6652         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6653                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
6654                 if (err)
6655                         return err;
6656         } else {
6657                 /* cfg80211_join_mesh() will sort it out */
6658                 setup.chandef.chan = NULL;
6659         }
6660
6661         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6662 }
6663
6664 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6665 {
6666         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6667         struct net_device *dev = info->user_ptr[1];
6668
6669         return cfg80211_leave_mesh(rdev, dev);
6670 }
6671
6672 #ifdef CONFIG_PM
6673 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6674 {
6675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6676         struct sk_buff *msg;
6677         void *hdr;
6678
6679         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6680                 return -EOPNOTSUPP;
6681
6682         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6683         if (!msg)
6684                 return -ENOMEM;
6685
6686         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6687                              NL80211_CMD_GET_WOWLAN);
6688         if (!hdr)
6689                 goto nla_put_failure;
6690
6691         if (rdev->wowlan) {
6692                 struct nlattr *nl_wowlan;
6693
6694                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6695                 if (!nl_wowlan)
6696                         goto nla_put_failure;
6697
6698                 if ((rdev->wowlan->any &&
6699                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6700                     (rdev->wowlan->disconnect &&
6701                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6702                     (rdev->wowlan->magic_pkt &&
6703                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6704                     (rdev->wowlan->gtk_rekey_failure &&
6705                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6706                     (rdev->wowlan->eap_identity_req &&
6707                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6708                     (rdev->wowlan->four_way_handshake &&
6709                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6710                     (rdev->wowlan->rfkill_release &&
6711                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6712                         goto nla_put_failure;
6713                 if (rdev->wowlan->n_patterns) {
6714                         struct nlattr *nl_pats, *nl_pat;
6715                         int i, pat_len;
6716
6717                         nl_pats = nla_nest_start(msg,
6718                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6719                         if (!nl_pats)
6720                                 goto nla_put_failure;
6721
6722                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6723                                 nl_pat = nla_nest_start(msg, i + 1);
6724                                 if (!nl_pat)
6725                                         goto nla_put_failure;
6726                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6727                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6728                                             DIV_ROUND_UP(pat_len, 8),
6729                                             rdev->wowlan->patterns[i].mask) ||
6730                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6731                                             pat_len,
6732                                             rdev->wowlan->patterns[i].pattern))
6733                                         goto nla_put_failure;
6734                                 nla_nest_end(msg, nl_pat);
6735                         }
6736                         nla_nest_end(msg, nl_pats);
6737                 }
6738
6739                 nla_nest_end(msg, nl_wowlan);
6740         }
6741
6742         genlmsg_end(msg, hdr);
6743         return genlmsg_reply(msg, info);
6744
6745 nla_put_failure:
6746         nlmsg_free(msg);
6747         return -ENOBUFS;
6748 }
6749
6750 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6751 {
6752         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6753         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6754         struct cfg80211_wowlan new_triggers = {};
6755         struct cfg80211_wowlan *ntrig;
6756         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6757         int err, i;
6758         bool prev_enabled = rdev->wowlan;
6759
6760         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6761                 return -EOPNOTSUPP;
6762
6763         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
6764                 cfg80211_rdev_free_wowlan(rdev);
6765                 rdev->wowlan = NULL;
6766                 goto set_wakeup;
6767         }
6768
6769         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6770                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6771                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6772                         nl80211_wowlan_policy);
6773         if (err)
6774                 return err;
6775
6776         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6777                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6778                         return -EINVAL;
6779                 new_triggers.any = true;
6780         }
6781
6782         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6783                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6784                         return -EINVAL;
6785                 new_triggers.disconnect = true;
6786         }
6787
6788         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6789                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6790                         return -EINVAL;
6791                 new_triggers.magic_pkt = true;
6792         }
6793
6794         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6795                 return -EINVAL;
6796
6797         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6798                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6799                         return -EINVAL;
6800                 new_triggers.gtk_rekey_failure = true;
6801         }
6802
6803         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6804                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6805                         return -EINVAL;
6806                 new_triggers.eap_identity_req = true;
6807         }
6808
6809         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6810                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6811                         return -EINVAL;
6812                 new_triggers.four_way_handshake = true;
6813         }
6814
6815         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6816                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6817                         return -EINVAL;
6818                 new_triggers.rfkill_release = true;
6819         }
6820
6821         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6822                 struct nlattr *pat;
6823                 int n_patterns = 0;
6824                 int rem, pat_len, mask_len;
6825                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6826
6827                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6828                                     rem)
6829                         n_patterns++;
6830                 if (n_patterns > wowlan->n_patterns)
6831                         return -EINVAL;
6832
6833                 new_triggers.patterns = kcalloc(n_patterns,
6834                                                 sizeof(new_triggers.patterns[0]),
6835                                                 GFP_KERNEL);
6836                 if (!new_triggers.patterns)
6837                         return -ENOMEM;
6838
6839                 new_triggers.n_patterns = n_patterns;
6840                 i = 0;
6841
6842                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6843                                     rem) {
6844                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6845                                   nla_data(pat), nla_len(pat), NULL);
6846                         err = -EINVAL;
6847                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6848                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6849                                 goto error;
6850                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6851                         mask_len = DIV_ROUND_UP(pat_len, 8);
6852                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6853                             mask_len)
6854                                 goto error;
6855                         if (pat_len > wowlan->pattern_max_len ||
6856                             pat_len < wowlan->pattern_min_len)
6857                                 goto error;
6858
6859                         new_triggers.patterns[i].mask =
6860                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6861                         if (!new_triggers.patterns[i].mask) {
6862                                 err = -ENOMEM;
6863                                 goto error;
6864                         }
6865                         new_triggers.patterns[i].pattern =
6866                                 new_triggers.patterns[i].mask + mask_len;
6867                         memcpy(new_triggers.patterns[i].mask,
6868                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6869                                mask_len);
6870                         new_triggers.patterns[i].pattern_len = pat_len;
6871                         memcpy(new_triggers.patterns[i].pattern,
6872                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6873                                pat_len);
6874                         i++;
6875                 }
6876         }
6877
6878         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
6879         if (!ntrig) {
6880                 err = -ENOMEM;
6881                 goto error;
6882         }
6883         cfg80211_rdev_free_wowlan(rdev);
6884         rdev->wowlan = ntrig;
6885
6886  set_wakeup:
6887         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6888                 rdev_set_wakeup(rdev, rdev->wowlan);
6889
6890         return 0;
6891  error:
6892         for (i = 0; i < new_triggers.n_patterns; i++)
6893                 kfree(new_triggers.patterns[i].mask);
6894         kfree(new_triggers.patterns);
6895         return err;
6896 }
6897 #endif
6898
6899 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6900 {
6901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6902         struct net_device *dev = info->user_ptr[1];
6903         struct wireless_dev *wdev = dev->ieee80211_ptr;
6904         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6905         struct cfg80211_gtk_rekey_data rekey_data;
6906         int err;
6907
6908         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6909                 return -EINVAL;
6910
6911         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6912                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6913                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6914                         nl80211_rekey_policy);
6915         if (err)
6916                 return err;
6917
6918         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6919                 return -ERANGE;
6920         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6921                 return -ERANGE;
6922         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6923                 return -ERANGE;
6924
6925         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6926                NL80211_KEK_LEN);
6927         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6928                NL80211_KCK_LEN);
6929         memcpy(rekey_data.replay_ctr,
6930                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6931                NL80211_REPLAY_CTR_LEN);
6932
6933         wdev_lock(wdev);
6934         if (!wdev->current_bss) {
6935                 err = -ENOTCONN;
6936                 goto out;
6937         }
6938
6939         if (!rdev->ops->set_rekey_data) {
6940                 err = -EOPNOTSUPP;
6941                 goto out;
6942         }
6943
6944         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
6945  out:
6946         wdev_unlock(wdev);
6947         return err;
6948 }
6949
6950 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6951                                              struct genl_info *info)
6952 {
6953         struct net_device *dev = info->user_ptr[1];
6954         struct wireless_dev *wdev = dev->ieee80211_ptr;
6955
6956         if (wdev->iftype != NL80211_IFTYPE_AP &&
6957             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6958                 return -EINVAL;
6959
6960         if (wdev->ap_unexpected_nlportid)
6961                 return -EBUSY;
6962
6963         wdev->ap_unexpected_nlportid = info->snd_portid;
6964         return 0;
6965 }
6966
6967 static int nl80211_probe_client(struct sk_buff *skb,
6968                                 struct genl_info *info)
6969 {
6970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6971         struct net_device *dev = info->user_ptr[1];
6972         struct wireless_dev *wdev = dev->ieee80211_ptr;
6973         struct sk_buff *msg;
6974         void *hdr;
6975         const u8 *addr;
6976         u64 cookie;
6977         int err;
6978
6979         if (wdev->iftype != NL80211_IFTYPE_AP &&
6980             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6981                 return -EOPNOTSUPP;
6982
6983         if (!info->attrs[NL80211_ATTR_MAC])
6984                 return -EINVAL;
6985
6986         if (!rdev->ops->probe_client)
6987                 return -EOPNOTSUPP;
6988
6989         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6990         if (!msg)
6991                 return -ENOMEM;
6992
6993         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6994                              NL80211_CMD_PROBE_CLIENT);
6995
6996         if (IS_ERR(hdr)) {
6997                 err = PTR_ERR(hdr);
6998                 goto free_msg;
6999         }
7000
7001         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7002
7003         err = rdev_probe_client(rdev, dev, addr, &cookie);
7004         if (err)
7005                 goto free_msg;
7006
7007         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7008                 goto nla_put_failure;
7009
7010         genlmsg_end(msg, hdr);
7011
7012         return genlmsg_reply(msg, info);
7013
7014  nla_put_failure:
7015         err = -ENOBUFS;
7016  free_msg:
7017         nlmsg_free(msg);
7018         return err;
7019 }
7020
7021 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7022 {
7023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7024         struct cfg80211_beacon_registration *reg, *nreg;
7025         int rv;
7026
7027         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7028                 return -EOPNOTSUPP;
7029
7030         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7031         if (!nreg)
7032                 return -ENOMEM;
7033
7034         /* First, check if already registered. */
7035         spin_lock_bh(&rdev->beacon_registrations_lock);
7036         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7037                 if (reg->nlportid == info->snd_portid) {
7038                         rv = -EALREADY;
7039                         goto out_err;
7040                 }
7041         }
7042         /* Add it to the list */
7043         nreg->nlportid = info->snd_portid;
7044         list_add(&nreg->list, &rdev->beacon_registrations);
7045
7046         spin_unlock_bh(&rdev->beacon_registrations_lock);
7047
7048         return 0;
7049 out_err:
7050         spin_unlock_bh(&rdev->beacon_registrations_lock);
7051         kfree(nreg);
7052         return rv;
7053 }
7054
7055 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7056 {
7057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7058         struct wireless_dev *wdev = info->user_ptr[1];
7059         int err;
7060
7061         if (!rdev->ops->start_p2p_device)
7062                 return -EOPNOTSUPP;
7063
7064         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7065                 return -EOPNOTSUPP;
7066
7067         if (wdev->p2p_started)
7068                 return 0;
7069
7070         mutex_lock(&rdev->devlist_mtx);
7071         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7072         mutex_unlock(&rdev->devlist_mtx);
7073         if (err)
7074                 return err;
7075
7076         err = rdev_start_p2p_device(rdev, wdev);
7077         if (err)
7078                 return err;
7079
7080         wdev->p2p_started = true;
7081         mutex_lock(&rdev->devlist_mtx);
7082         rdev->opencount++;
7083         mutex_unlock(&rdev->devlist_mtx);
7084
7085         return 0;
7086 }
7087
7088 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7089 {
7090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7091         struct wireless_dev *wdev = info->user_ptr[1];
7092
7093         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7094                 return -EOPNOTSUPP;
7095
7096         if (!rdev->ops->stop_p2p_device)
7097                 return -EOPNOTSUPP;
7098
7099         if (!wdev->p2p_started)
7100                 return 0;
7101
7102         rdev_stop_p2p_device(rdev, wdev);
7103         wdev->p2p_started = false;
7104
7105         mutex_lock(&rdev->devlist_mtx);
7106         rdev->opencount--;
7107         mutex_unlock(&rdev->devlist_mtx);
7108
7109         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7110                 rdev->scan_req->aborted = true;
7111                 ___cfg80211_scan_done(rdev, true);
7112         }
7113
7114         return 0;
7115 }
7116
7117 #define NL80211_FLAG_NEED_WIPHY         0x01
7118 #define NL80211_FLAG_NEED_NETDEV        0x02
7119 #define NL80211_FLAG_NEED_RTNL          0x04
7120 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7121 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7122                                          NL80211_FLAG_CHECK_NETDEV_UP)
7123 #define NL80211_FLAG_NEED_WDEV          0x10
7124 /* If a netdev is associated, it must be UP, P2P must be started */
7125 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7126                                          NL80211_FLAG_CHECK_NETDEV_UP)
7127
7128 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7129                             struct genl_info *info)
7130 {
7131         struct cfg80211_registered_device *rdev;
7132         struct wireless_dev *wdev;
7133         struct net_device *dev;
7134         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7135
7136         if (rtnl)
7137                 rtnl_lock();
7138
7139         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7140                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7141                 if (IS_ERR(rdev)) {
7142                         if (rtnl)
7143                                 rtnl_unlock();
7144                         return PTR_ERR(rdev);
7145                 }
7146                 info->user_ptr[0] = rdev;
7147         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7148                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7149                 mutex_lock(&cfg80211_mutex);
7150                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7151                                                   info->attrs);
7152                 if (IS_ERR(wdev)) {
7153                         mutex_unlock(&cfg80211_mutex);
7154                         if (rtnl)
7155                                 rtnl_unlock();
7156                         return PTR_ERR(wdev);
7157                 }
7158
7159                 dev = wdev->netdev;
7160                 rdev = wiphy_to_dev(wdev->wiphy);
7161
7162                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7163                         if (!dev) {
7164                                 mutex_unlock(&cfg80211_mutex);
7165                                 if (rtnl)
7166                                         rtnl_unlock();
7167                                 return -EINVAL;
7168                         }
7169
7170                         info->user_ptr[1] = dev;
7171                 } else {
7172                         info->user_ptr[1] = wdev;
7173                 }
7174
7175                 if (dev) {
7176                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7177                             !netif_running(dev)) {
7178                                 mutex_unlock(&cfg80211_mutex);
7179                                 if (rtnl)
7180                                         rtnl_unlock();
7181                                 return -ENETDOWN;
7182                         }
7183
7184                         dev_hold(dev);
7185                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7186                         if (!wdev->p2p_started) {
7187                                 mutex_unlock(&cfg80211_mutex);
7188                                 if (rtnl)
7189                                         rtnl_unlock();
7190                                 return -ENETDOWN;
7191                         }
7192                 }
7193
7194                 cfg80211_lock_rdev(rdev);
7195
7196                 mutex_unlock(&cfg80211_mutex);
7197
7198                 info->user_ptr[0] = rdev;
7199         }
7200
7201         return 0;
7202 }
7203
7204 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7205                               struct genl_info *info)
7206 {
7207         if (info->user_ptr[0])
7208                 cfg80211_unlock_rdev(info->user_ptr[0]);
7209         if (info->user_ptr[1]) {
7210                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7211                         struct wireless_dev *wdev = info->user_ptr[1];
7212
7213                         if (wdev->netdev)
7214                                 dev_put(wdev->netdev);
7215                 } else {
7216                         dev_put(info->user_ptr[1]);
7217                 }
7218         }
7219         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7220                 rtnl_unlock();
7221 }
7222
7223 static struct genl_ops nl80211_ops[] = {
7224         {
7225                 .cmd = NL80211_CMD_GET_WIPHY,
7226                 .doit = nl80211_get_wiphy,
7227                 .dumpit = nl80211_dump_wiphy,
7228                 .policy = nl80211_policy,
7229                 /* can be retrieved by unprivileged users */
7230                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7231         },
7232         {
7233                 .cmd = NL80211_CMD_SET_WIPHY,
7234                 .doit = nl80211_set_wiphy,
7235                 .policy = nl80211_policy,
7236                 .flags = GENL_ADMIN_PERM,
7237                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7238         },
7239         {
7240                 .cmd = NL80211_CMD_GET_INTERFACE,
7241                 .doit = nl80211_get_interface,
7242                 .dumpit = nl80211_dump_interface,
7243                 .policy = nl80211_policy,
7244                 /* can be retrieved by unprivileged users */
7245                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7246         },
7247         {
7248                 .cmd = NL80211_CMD_SET_INTERFACE,
7249                 .doit = nl80211_set_interface,
7250                 .policy = nl80211_policy,
7251                 .flags = GENL_ADMIN_PERM,
7252                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7253                                   NL80211_FLAG_NEED_RTNL,
7254         },
7255         {
7256                 .cmd = NL80211_CMD_NEW_INTERFACE,
7257                 .doit = nl80211_new_interface,
7258                 .policy = nl80211_policy,
7259                 .flags = GENL_ADMIN_PERM,
7260                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7261                                   NL80211_FLAG_NEED_RTNL,
7262         },
7263         {
7264                 .cmd = NL80211_CMD_DEL_INTERFACE,
7265                 .doit = nl80211_del_interface,
7266                 .policy = nl80211_policy,
7267                 .flags = GENL_ADMIN_PERM,
7268                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7269                                   NL80211_FLAG_NEED_RTNL,
7270         },
7271         {
7272                 .cmd = NL80211_CMD_GET_KEY,
7273                 .doit = nl80211_get_key,
7274                 .policy = nl80211_policy,
7275                 .flags = GENL_ADMIN_PERM,
7276                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7277                                   NL80211_FLAG_NEED_RTNL,
7278         },
7279         {
7280                 .cmd = NL80211_CMD_SET_KEY,
7281                 .doit = nl80211_set_key,
7282                 .policy = nl80211_policy,
7283                 .flags = GENL_ADMIN_PERM,
7284                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7285                                   NL80211_FLAG_NEED_RTNL,
7286         },
7287         {
7288                 .cmd = NL80211_CMD_NEW_KEY,
7289                 .doit = nl80211_new_key,
7290                 .policy = nl80211_policy,
7291                 .flags = GENL_ADMIN_PERM,
7292                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7293                                   NL80211_FLAG_NEED_RTNL,
7294         },
7295         {
7296                 .cmd = NL80211_CMD_DEL_KEY,
7297                 .doit = nl80211_del_key,
7298                 .policy = nl80211_policy,
7299                 .flags = GENL_ADMIN_PERM,
7300                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7301                                   NL80211_FLAG_NEED_RTNL,
7302         },
7303         {
7304                 .cmd = NL80211_CMD_SET_BEACON,
7305                 .policy = nl80211_policy,
7306                 .flags = GENL_ADMIN_PERM,
7307                 .doit = nl80211_set_beacon,
7308                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7309                                   NL80211_FLAG_NEED_RTNL,
7310         },
7311         {
7312                 .cmd = NL80211_CMD_START_AP,
7313                 .policy = nl80211_policy,
7314                 .flags = GENL_ADMIN_PERM,
7315                 .doit = nl80211_start_ap,
7316                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7317                                   NL80211_FLAG_NEED_RTNL,
7318         },
7319         {
7320                 .cmd = NL80211_CMD_STOP_AP,
7321                 .policy = nl80211_policy,
7322                 .flags = GENL_ADMIN_PERM,
7323                 .doit = nl80211_stop_ap,
7324                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7325                                   NL80211_FLAG_NEED_RTNL,
7326         },
7327         {
7328                 .cmd = NL80211_CMD_GET_STATION,
7329                 .doit = nl80211_get_station,
7330                 .dumpit = nl80211_dump_station,
7331                 .policy = nl80211_policy,
7332                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7333                                   NL80211_FLAG_NEED_RTNL,
7334         },
7335         {
7336                 .cmd = NL80211_CMD_SET_STATION,
7337                 .doit = nl80211_set_station,
7338                 .policy = nl80211_policy,
7339                 .flags = GENL_ADMIN_PERM,
7340                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7341                                   NL80211_FLAG_NEED_RTNL,
7342         },
7343         {
7344                 .cmd = NL80211_CMD_NEW_STATION,
7345                 .doit = nl80211_new_station,
7346                 .policy = nl80211_policy,
7347                 .flags = GENL_ADMIN_PERM,
7348                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7349                                   NL80211_FLAG_NEED_RTNL,
7350         },
7351         {
7352                 .cmd = NL80211_CMD_DEL_STATION,
7353                 .doit = nl80211_del_station,
7354                 .policy = nl80211_policy,
7355                 .flags = GENL_ADMIN_PERM,
7356                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7357                                   NL80211_FLAG_NEED_RTNL,
7358         },
7359         {
7360                 .cmd = NL80211_CMD_GET_MPATH,
7361                 .doit = nl80211_get_mpath,
7362                 .dumpit = nl80211_dump_mpath,
7363                 .policy = nl80211_policy,
7364                 .flags = GENL_ADMIN_PERM,
7365                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7366                                   NL80211_FLAG_NEED_RTNL,
7367         },
7368         {
7369                 .cmd = NL80211_CMD_SET_MPATH,
7370                 .doit = nl80211_set_mpath,
7371                 .policy = nl80211_policy,
7372                 .flags = GENL_ADMIN_PERM,
7373                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7374                                   NL80211_FLAG_NEED_RTNL,
7375         },
7376         {
7377                 .cmd = NL80211_CMD_NEW_MPATH,
7378                 .doit = nl80211_new_mpath,
7379                 .policy = nl80211_policy,
7380                 .flags = GENL_ADMIN_PERM,
7381                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7382                                   NL80211_FLAG_NEED_RTNL,
7383         },
7384         {
7385                 .cmd = NL80211_CMD_DEL_MPATH,
7386                 .doit = nl80211_del_mpath,
7387                 .policy = nl80211_policy,
7388                 .flags = GENL_ADMIN_PERM,
7389                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7390                                   NL80211_FLAG_NEED_RTNL,
7391         },
7392         {
7393                 .cmd = NL80211_CMD_SET_BSS,
7394                 .doit = nl80211_set_bss,
7395                 .policy = nl80211_policy,
7396                 .flags = GENL_ADMIN_PERM,
7397                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7398                                   NL80211_FLAG_NEED_RTNL,
7399         },
7400         {
7401                 .cmd = NL80211_CMD_GET_REG,
7402                 .doit = nl80211_get_reg,
7403                 .policy = nl80211_policy,
7404                 /* can be retrieved by unprivileged users */
7405         },
7406         {
7407                 .cmd = NL80211_CMD_SET_REG,
7408                 .doit = nl80211_set_reg,
7409                 .policy = nl80211_policy,
7410                 .flags = GENL_ADMIN_PERM,
7411         },
7412         {
7413                 .cmd = NL80211_CMD_REQ_SET_REG,
7414                 .doit = nl80211_req_set_reg,
7415                 .policy = nl80211_policy,
7416                 .flags = GENL_ADMIN_PERM,
7417         },
7418         {
7419                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7420                 .doit = nl80211_get_mesh_config,
7421                 .policy = nl80211_policy,
7422                 /* can be retrieved by unprivileged users */
7423                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7424                                   NL80211_FLAG_NEED_RTNL,
7425         },
7426         {
7427                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7428                 .doit = nl80211_update_mesh_config,
7429                 .policy = nl80211_policy,
7430                 .flags = GENL_ADMIN_PERM,
7431                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7432                                   NL80211_FLAG_NEED_RTNL,
7433         },
7434         {
7435                 .cmd = NL80211_CMD_TRIGGER_SCAN,
7436                 .doit = nl80211_trigger_scan,
7437                 .policy = nl80211_policy,
7438                 .flags = GENL_ADMIN_PERM,
7439                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7440                                   NL80211_FLAG_NEED_RTNL,
7441         },
7442         {
7443                 .cmd = NL80211_CMD_GET_SCAN,
7444                 .policy = nl80211_policy,
7445                 .dumpit = nl80211_dump_scan,
7446         },
7447         {
7448                 .cmd = NL80211_CMD_START_SCHED_SCAN,
7449                 .doit = nl80211_start_sched_scan,
7450                 .policy = nl80211_policy,
7451                 .flags = GENL_ADMIN_PERM,
7452                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7453                                   NL80211_FLAG_NEED_RTNL,
7454         },
7455         {
7456                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7457                 .doit = nl80211_stop_sched_scan,
7458                 .policy = nl80211_policy,
7459                 .flags = GENL_ADMIN_PERM,
7460                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7461                                   NL80211_FLAG_NEED_RTNL,
7462         },
7463         {
7464                 .cmd = NL80211_CMD_AUTHENTICATE,
7465                 .doit = nl80211_authenticate,
7466                 .policy = nl80211_policy,
7467                 .flags = GENL_ADMIN_PERM,
7468                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7469                                   NL80211_FLAG_NEED_RTNL,
7470         },
7471         {
7472                 .cmd = NL80211_CMD_ASSOCIATE,
7473                 .doit = nl80211_associate,
7474                 .policy = nl80211_policy,
7475                 .flags = GENL_ADMIN_PERM,
7476                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7477                                   NL80211_FLAG_NEED_RTNL,
7478         },
7479         {
7480                 .cmd = NL80211_CMD_DEAUTHENTICATE,
7481                 .doit = nl80211_deauthenticate,
7482                 .policy = nl80211_policy,
7483                 .flags = GENL_ADMIN_PERM,
7484                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7485                                   NL80211_FLAG_NEED_RTNL,
7486         },
7487         {
7488                 .cmd = NL80211_CMD_DISASSOCIATE,
7489                 .doit = nl80211_disassociate,
7490                 .policy = nl80211_policy,
7491                 .flags = GENL_ADMIN_PERM,
7492                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7493                                   NL80211_FLAG_NEED_RTNL,
7494         },
7495         {
7496                 .cmd = NL80211_CMD_JOIN_IBSS,
7497                 .doit = nl80211_join_ibss,
7498                 .policy = nl80211_policy,
7499                 .flags = GENL_ADMIN_PERM,
7500                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7501                                   NL80211_FLAG_NEED_RTNL,
7502         },
7503         {
7504                 .cmd = NL80211_CMD_LEAVE_IBSS,
7505                 .doit = nl80211_leave_ibss,
7506                 .policy = nl80211_policy,
7507                 .flags = GENL_ADMIN_PERM,
7508                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7509                                   NL80211_FLAG_NEED_RTNL,
7510         },
7511 #ifdef CONFIG_NL80211_TESTMODE
7512         {
7513                 .cmd = NL80211_CMD_TESTMODE,
7514                 .doit = nl80211_testmode_do,
7515                 .dumpit = nl80211_testmode_dump,
7516                 .policy = nl80211_policy,
7517                 .flags = GENL_ADMIN_PERM,
7518                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7519                                   NL80211_FLAG_NEED_RTNL,
7520         },
7521 #endif
7522         {
7523                 .cmd = NL80211_CMD_CONNECT,
7524                 .doit = nl80211_connect,
7525                 .policy = nl80211_policy,
7526                 .flags = GENL_ADMIN_PERM,
7527                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7528                                   NL80211_FLAG_NEED_RTNL,
7529         },
7530         {
7531                 .cmd = NL80211_CMD_DISCONNECT,
7532                 .doit = nl80211_disconnect,
7533                 .policy = nl80211_policy,
7534                 .flags = GENL_ADMIN_PERM,
7535                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7536                                   NL80211_FLAG_NEED_RTNL,
7537         },
7538         {
7539                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7540                 .doit = nl80211_wiphy_netns,
7541                 .policy = nl80211_policy,
7542                 .flags = GENL_ADMIN_PERM,
7543                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7544                                   NL80211_FLAG_NEED_RTNL,
7545         },
7546         {
7547                 .cmd = NL80211_CMD_GET_SURVEY,
7548                 .policy = nl80211_policy,
7549                 .dumpit = nl80211_dump_survey,
7550         },
7551         {
7552                 .cmd = NL80211_CMD_SET_PMKSA,
7553                 .doit = nl80211_setdel_pmksa,
7554                 .policy = nl80211_policy,
7555                 .flags = GENL_ADMIN_PERM,
7556                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7557                                   NL80211_FLAG_NEED_RTNL,
7558         },
7559         {
7560                 .cmd = NL80211_CMD_DEL_PMKSA,
7561                 .doit = nl80211_setdel_pmksa,
7562                 .policy = nl80211_policy,
7563                 .flags = GENL_ADMIN_PERM,
7564                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7565                                   NL80211_FLAG_NEED_RTNL,
7566         },
7567         {
7568                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7569                 .doit = nl80211_flush_pmksa,
7570                 .policy = nl80211_policy,
7571                 .flags = GENL_ADMIN_PERM,
7572                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7573                                   NL80211_FLAG_NEED_RTNL,
7574         },
7575         {
7576                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7577                 .doit = nl80211_remain_on_channel,
7578                 .policy = nl80211_policy,
7579                 .flags = GENL_ADMIN_PERM,
7580                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7581                                   NL80211_FLAG_NEED_RTNL,
7582         },
7583         {
7584                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7585                 .doit = nl80211_cancel_remain_on_channel,
7586                 .policy = nl80211_policy,
7587                 .flags = GENL_ADMIN_PERM,
7588                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7589                                   NL80211_FLAG_NEED_RTNL,
7590         },
7591         {
7592                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7593                 .doit = nl80211_set_tx_bitrate_mask,
7594                 .policy = nl80211_policy,
7595                 .flags = GENL_ADMIN_PERM,
7596                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7597                                   NL80211_FLAG_NEED_RTNL,
7598         },
7599         {
7600                 .cmd = NL80211_CMD_REGISTER_FRAME,
7601                 .doit = nl80211_register_mgmt,
7602                 .policy = nl80211_policy,
7603                 .flags = GENL_ADMIN_PERM,
7604                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7605                                   NL80211_FLAG_NEED_RTNL,
7606         },
7607         {
7608                 .cmd = NL80211_CMD_FRAME,
7609                 .doit = nl80211_tx_mgmt,
7610                 .policy = nl80211_policy,
7611                 .flags = GENL_ADMIN_PERM,
7612                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7613                                   NL80211_FLAG_NEED_RTNL,
7614         },
7615         {
7616                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7617                 .doit = nl80211_tx_mgmt_cancel_wait,
7618                 .policy = nl80211_policy,
7619                 .flags = GENL_ADMIN_PERM,
7620                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7621                                   NL80211_FLAG_NEED_RTNL,
7622         },
7623         {
7624                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7625                 .doit = nl80211_set_power_save,
7626                 .policy = nl80211_policy,
7627                 .flags = GENL_ADMIN_PERM,
7628                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7629                                   NL80211_FLAG_NEED_RTNL,
7630         },
7631         {
7632                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7633                 .doit = nl80211_get_power_save,
7634                 .policy = nl80211_policy,
7635                 /* can be retrieved by unprivileged users */
7636                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7637                                   NL80211_FLAG_NEED_RTNL,
7638         },
7639         {
7640                 .cmd = NL80211_CMD_SET_CQM,
7641                 .doit = nl80211_set_cqm,
7642                 .policy = nl80211_policy,
7643                 .flags = GENL_ADMIN_PERM,
7644                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7645                                   NL80211_FLAG_NEED_RTNL,
7646         },
7647         {
7648                 .cmd = NL80211_CMD_SET_CHANNEL,
7649                 .doit = nl80211_set_channel,
7650                 .policy = nl80211_policy,
7651                 .flags = GENL_ADMIN_PERM,
7652                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7653                                   NL80211_FLAG_NEED_RTNL,
7654         },
7655         {
7656                 .cmd = NL80211_CMD_SET_WDS_PEER,
7657                 .doit = nl80211_set_wds_peer,
7658                 .policy = nl80211_policy,
7659                 .flags = GENL_ADMIN_PERM,
7660                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7661                                   NL80211_FLAG_NEED_RTNL,
7662         },
7663         {
7664                 .cmd = NL80211_CMD_JOIN_MESH,
7665                 .doit = nl80211_join_mesh,
7666                 .policy = nl80211_policy,
7667                 .flags = GENL_ADMIN_PERM,
7668                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7669                                   NL80211_FLAG_NEED_RTNL,
7670         },
7671         {
7672                 .cmd = NL80211_CMD_LEAVE_MESH,
7673                 .doit = nl80211_leave_mesh,
7674                 .policy = nl80211_policy,
7675                 .flags = GENL_ADMIN_PERM,
7676                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7677                                   NL80211_FLAG_NEED_RTNL,
7678         },
7679 #ifdef CONFIG_PM
7680         {
7681                 .cmd = NL80211_CMD_GET_WOWLAN,
7682                 .doit = nl80211_get_wowlan,
7683                 .policy = nl80211_policy,
7684                 /* can be retrieved by unprivileged users */
7685                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7686                                   NL80211_FLAG_NEED_RTNL,
7687         },
7688         {
7689                 .cmd = NL80211_CMD_SET_WOWLAN,
7690                 .doit = nl80211_set_wowlan,
7691                 .policy = nl80211_policy,
7692                 .flags = GENL_ADMIN_PERM,
7693                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7694                                   NL80211_FLAG_NEED_RTNL,
7695         },
7696 #endif
7697         {
7698                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7699                 .doit = nl80211_set_rekey_data,
7700                 .policy = nl80211_policy,
7701                 .flags = GENL_ADMIN_PERM,
7702                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7703                                   NL80211_FLAG_NEED_RTNL,
7704         },
7705         {
7706                 .cmd = NL80211_CMD_TDLS_MGMT,
7707                 .doit = nl80211_tdls_mgmt,
7708                 .policy = nl80211_policy,
7709                 .flags = GENL_ADMIN_PERM,
7710                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7711                                   NL80211_FLAG_NEED_RTNL,
7712         },
7713         {
7714                 .cmd = NL80211_CMD_TDLS_OPER,
7715                 .doit = nl80211_tdls_oper,
7716                 .policy = nl80211_policy,
7717                 .flags = GENL_ADMIN_PERM,
7718                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7719                                   NL80211_FLAG_NEED_RTNL,
7720         },
7721         {
7722                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7723                 .doit = nl80211_register_unexpected_frame,
7724                 .policy = nl80211_policy,
7725                 .flags = GENL_ADMIN_PERM,
7726                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7727                                   NL80211_FLAG_NEED_RTNL,
7728         },
7729         {
7730                 .cmd = NL80211_CMD_PROBE_CLIENT,
7731                 .doit = nl80211_probe_client,
7732                 .policy = nl80211_policy,
7733                 .flags = GENL_ADMIN_PERM,
7734                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7735                                   NL80211_FLAG_NEED_RTNL,
7736         },
7737         {
7738                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7739                 .doit = nl80211_register_beacons,
7740                 .policy = nl80211_policy,
7741                 .flags = GENL_ADMIN_PERM,
7742                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7743                                   NL80211_FLAG_NEED_RTNL,
7744         },
7745         {
7746                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7747                 .doit = nl80211_set_noack_map,
7748                 .policy = nl80211_policy,
7749                 .flags = GENL_ADMIN_PERM,
7750                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7751                                   NL80211_FLAG_NEED_RTNL,
7752         },
7753         {
7754                 .cmd = NL80211_CMD_START_P2P_DEVICE,
7755                 .doit = nl80211_start_p2p_device,
7756                 .policy = nl80211_policy,
7757                 .flags = GENL_ADMIN_PERM,
7758                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7759                                   NL80211_FLAG_NEED_RTNL,
7760         },
7761         {
7762                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
7763                 .doit = nl80211_stop_p2p_device,
7764                 .policy = nl80211_policy,
7765                 .flags = GENL_ADMIN_PERM,
7766                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7767                                   NL80211_FLAG_NEED_RTNL,
7768         },
7769         {
7770                 .cmd = NL80211_CMD_SET_MCAST_RATE,
7771                 .doit = nl80211_set_mcast_rate,
7772                 .policy = nl80211_policy,
7773                 .flags = GENL_ADMIN_PERM,
7774                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7775                                   NL80211_FLAG_NEED_RTNL,
7776         },
7777 };
7778
7779 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7780         .name = "mlme",
7781 };
7782
7783 /* multicast groups */
7784 static struct genl_multicast_group nl80211_config_mcgrp = {
7785         .name = "config",
7786 };
7787 static struct genl_multicast_group nl80211_scan_mcgrp = {
7788         .name = "scan",
7789 };
7790 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7791         .name = "regulatory",
7792 };
7793
7794 /* notification functions */
7795
7796 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7797 {
7798         struct sk_buff *msg;
7799
7800         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7801         if (!msg)
7802                 return;
7803
7804         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7805                 nlmsg_free(msg);
7806                 return;
7807         }
7808
7809         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7810                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7811 }
7812
7813 static int nl80211_add_scan_req(struct sk_buff *msg,
7814                                 struct cfg80211_registered_device *rdev)
7815 {
7816         struct cfg80211_scan_request *req = rdev->scan_req;
7817         struct nlattr *nest;
7818         int i;
7819
7820         ASSERT_RDEV_LOCK(rdev);
7821
7822         if (WARN_ON(!req))
7823                 return 0;
7824
7825         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7826         if (!nest)
7827                 goto nla_put_failure;
7828         for (i = 0; i < req->n_ssids; i++) {
7829                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7830                         goto nla_put_failure;
7831         }
7832         nla_nest_end(msg, nest);
7833
7834         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7835         if (!nest)
7836                 goto nla_put_failure;
7837         for (i = 0; i < req->n_channels; i++) {
7838                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7839                         goto nla_put_failure;
7840         }
7841         nla_nest_end(msg, nest);
7842
7843         if (req->ie &&
7844             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7845                 goto nla_put_failure;
7846
7847         if (req->flags)
7848                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
7849
7850         return 0;
7851  nla_put_failure:
7852         return -ENOBUFS;
7853 }
7854
7855 static int nl80211_send_scan_msg(struct sk_buff *msg,
7856                                  struct cfg80211_registered_device *rdev,
7857                                  struct wireless_dev *wdev,
7858                                  u32 portid, u32 seq, int flags,
7859                                  u32 cmd)
7860 {
7861         void *hdr;
7862
7863         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7864         if (!hdr)
7865                 return -1;
7866
7867         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7868             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
7869                                          wdev->netdev->ifindex)) ||
7870             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
7871                 goto nla_put_failure;
7872
7873         /* ignore errors and send incomplete event anyway */
7874         nl80211_add_scan_req(msg, rdev);
7875
7876         return genlmsg_end(msg, hdr);
7877
7878  nla_put_failure:
7879         genlmsg_cancel(msg, hdr);
7880         return -EMSGSIZE;
7881 }
7882
7883 static int
7884 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7885                             struct cfg80211_registered_device *rdev,
7886                             struct net_device *netdev,
7887                             u32 portid, u32 seq, int flags, u32 cmd)
7888 {
7889         void *hdr;
7890
7891         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7892         if (!hdr)
7893                 return -1;
7894
7895         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7896             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7897                 goto nla_put_failure;
7898
7899         return genlmsg_end(msg, hdr);
7900
7901  nla_put_failure:
7902         genlmsg_cancel(msg, hdr);
7903         return -EMSGSIZE;
7904 }
7905
7906 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7907                              struct wireless_dev *wdev)
7908 {
7909         struct sk_buff *msg;
7910
7911         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7912         if (!msg)
7913                 return;
7914
7915         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7916                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7917                 nlmsg_free(msg);
7918                 return;
7919         }
7920
7921         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7922                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7923 }
7924
7925 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7926                             struct wireless_dev *wdev)
7927 {
7928         struct sk_buff *msg;
7929
7930         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7931         if (!msg)
7932                 return;
7933
7934         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7935                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7936                 nlmsg_free(msg);
7937                 return;
7938         }
7939
7940         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7941                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7942 }
7943
7944 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7945                                struct wireless_dev *wdev)
7946 {
7947         struct sk_buff *msg;
7948
7949         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7950         if (!msg)
7951                 return;
7952
7953         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7954                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7955                 nlmsg_free(msg);
7956                 return;
7957         }
7958
7959         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7960                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7961 }
7962
7963 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7964                                      struct net_device *netdev)
7965 {
7966         struct sk_buff *msg;
7967
7968         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7969         if (!msg)
7970                 return;
7971
7972         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7973                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7974                 nlmsg_free(msg);
7975                 return;
7976         }
7977
7978         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7979                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7980 }
7981
7982 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7983                              struct net_device *netdev, u32 cmd)
7984 {
7985         struct sk_buff *msg;
7986
7987         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7988         if (!msg)
7989                 return;
7990
7991         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7992                 nlmsg_free(msg);
7993                 return;
7994         }
7995
7996         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7997                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7998 }
7999
8000 /*
8001  * This can happen on global regulatory changes or device specific settings
8002  * based on custom world regulatory domains.
8003  */
8004 void nl80211_send_reg_change_event(struct regulatory_request *request)
8005 {
8006         struct sk_buff *msg;
8007         void *hdr;
8008
8009         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8010         if (!msg)
8011                 return;
8012
8013         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8014         if (!hdr) {
8015                 nlmsg_free(msg);
8016                 return;
8017         }
8018
8019         /* Userspace can always count this one always being set */
8020         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8021                 goto nla_put_failure;
8022
8023         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8024                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8025                                NL80211_REGDOM_TYPE_WORLD))
8026                         goto nla_put_failure;
8027         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8028                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8029                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8030                         goto nla_put_failure;
8031         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8032                    request->intersect) {
8033                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8034                                NL80211_REGDOM_TYPE_INTERSECTION))
8035                         goto nla_put_failure;
8036         } else {
8037                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8038                                NL80211_REGDOM_TYPE_COUNTRY) ||
8039                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8040                                    request->alpha2))
8041                         goto nla_put_failure;
8042         }
8043
8044         if (wiphy_idx_valid(request->wiphy_idx) &&
8045             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8046                 goto nla_put_failure;
8047
8048         genlmsg_end(msg, hdr);
8049
8050         rcu_read_lock();
8051         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8052                                 GFP_ATOMIC);
8053         rcu_read_unlock();
8054
8055         return;
8056
8057 nla_put_failure:
8058         genlmsg_cancel(msg, hdr);
8059         nlmsg_free(msg);
8060 }
8061
8062 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8063                                     struct net_device *netdev,
8064                                     const u8 *buf, size_t len,
8065                                     enum nl80211_commands cmd, gfp_t gfp)
8066 {
8067         struct sk_buff *msg;
8068         void *hdr;
8069
8070         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8071         if (!msg)
8072                 return;
8073
8074         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8075         if (!hdr) {
8076                 nlmsg_free(msg);
8077                 return;
8078         }
8079
8080         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8081             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8082             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8083                 goto nla_put_failure;
8084
8085         genlmsg_end(msg, hdr);
8086
8087         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8088                                 nl80211_mlme_mcgrp.id, gfp);
8089         return;
8090
8091  nla_put_failure:
8092         genlmsg_cancel(msg, hdr);
8093         nlmsg_free(msg);
8094 }
8095
8096 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8097                           struct net_device *netdev, const u8 *buf,
8098                           size_t len, gfp_t gfp)
8099 {
8100         nl80211_send_mlme_event(rdev, netdev, buf, len,
8101                                 NL80211_CMD_AUTHENTICATE, gfp);
8102 }
8103
8104 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8105                            struct net_device *netdev, const u8 *buf,
8106                            size_t len, gfp_t gfp)
8107 {
8108         nl80211_send_mlme_event(rdev, netdev, buf, len,
8109                                 NL80211_CMD_ASSOCIATE, gfp);
8110 }
8111
8112 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8113                          struct net_device *netdev, const u8 *buf,
8114                          size_t len, gfp_t gfp)
8115 {
8116         nl80211_send_mlme_event(rdev, netdev, buf, len,
8117                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8118 }
8119
8120 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8121                            struct net_device *netdev, const u8 *buf,
8122                            size_t len, gfp_t gfp)
8123 {
8124         nl80211_send_mlme_event(rdev, netdev, buf, len,
8125                                 NL80211_CMD_DISASSOCIATE, gfp);
8126 }
8127
8128 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8129                                 struct net_device *netdev, const u8 *buf,
8130                                 size_t len, gfp_t gfp)
8131 {
8132         nl80211_send_mlme_event(rdev, netdev, buf, len,
8133                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8134 }
8135
8136 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8137                                   struct net_device *netdev, const u8 *buf,
8138                                   size_t len, gfp_t gfp)
8139 {
8140         nl80211_send_mlme_event(rdev, netdev, buf, len,
8141                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8142 }
8143
8144 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8145                                       struct net_device *netdev, int cmd,
8146                                       const u8 *addr, gfp_t gfp)
8147 {
8148         struct sk_buff *msg;
8149         void *hdr;
8150
8151         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8152         if (!msg)
8153                 return;
8154
8155         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8156         if (!hdr) {
8157                 nlmsg_free(msg);
8158                 return;
8159         }
8160
8161         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8162             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8163             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8164             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8165                 goto nla_put_failure;
8166
8167         genlmsg_end(msg, hdr);
8168
8169         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8170                                 nl80211_mlme_mcgrp.id, gfp);
8171         return;
8172
8173  nla_put_failure:
8174         genlmsg_cancel(msg, hdr);
8175         nlmsg_free(msg);
8176 }
8177
8178 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8179                                struct net_device *netdev, const u8 *addr,
8180                                gfp_t gfp)
8181 {
8182         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8183                                   addr, gfp);
8184 }
8185
8186 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8187                                 struct net_device *netdev, const u8 *addr,
8188                                 gfp_t gfp)
8189 {
8190         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8191                                   addr, gfp);
8192 }
8193
8194 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8195                                  struct net_device *netdev, const u8 *bssid,
8196                                  const u8 *req_ie, size_t req_ie_len,
8197                                  const u8 *resp_ie, size_t resp_ie_len,
8198                                  u16 status, gfp_t gfp)
8199 {
8200         struct sk_buff *msg;
8201         void *hdr;
8202
8203         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8204         if (!msg)
8205                 return;
8206
8207         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8208         if (!hdr) {
8209                 nlmsg_free(msg);
8210                 return;
8211         }
8212
8213         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8214             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8215             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8216             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8217             (req_ie &&
8218              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8219             (resp_ie &&
8220              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8221                 goto nla_put_failure;
8222
8223         genlmsg_end(msg, hdr);
8224
8225         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8226                                 nl80211_mlme_mcgrp.id, gfp);
8227         return;
8228
8229  nla_put_failure:
8230         genlmsg_cancel(msg, hdr);
8231         nlmsg_free(msg);
8232
8233 }
8234
8235 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8236                          struct net_device *netdev, const u8 *bssid,
8237                          const u8 *req_ie, size_t req_ie_len,
8238                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8239 {
8240         struct sk_buff *msg;
8241         void *hdr;
8242
8243         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8244         if (!msg)
8245                 return;
8246
8247         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8248         if (!hdr) {
8249                 nlmsg_free(msg);
8250                 return;
8251         }
8252
8253         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8254             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8255             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8256             (req_ie &&
8257              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8258             (resp_ie &&
8259              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8260                 goto nla_put_failure;
8261
8262         genlmsg_end(msg, hdr);
8263
8264         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8265                                 nl80211_mlme_mcgrp.id, gfp);
8266         return;
8267
8268  nla_put_failure:
8269         genlmsg_cancel(msg, hdr);
8270         nlmsg_free(msg);
8271
8272 }
8273
8274 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8275                                struct net_device *netdev, u16 reason,
8276                                const u8 *ie, size_t ie_len, bool from_ap)
8277 {
8278         struct sk_buff *msg;
8279         void *hdr;
8280
8281         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8282         if (!msg)
8283                 return;
8284
8285         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8286         if (!hdr) {
8287                 nlmsg_free(msg);
8288                 return;
8289         }
8290
8291         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8292             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8293             (from_ap && reason &&
8294              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8295             (from_ap &&
8296              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8297             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8298                 goto nla_put_failure;
8299
8300         genlmsg_end(msg, hdr);
8301
8302         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8303                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8304         return;
8305
8306  nla_put_failure:
8307         genlmsg_cancel(msg, hdr);
8308         nlmsg_free(msg);
8309
8310 }
8311
8312 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8313                              struct net_device *netdev, const u8 *bssid,
8314                              gfp_t gfp)
8315 {
8316         struct sk_buff *msg;
8317         void *hdr;
8318
8319         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8320         if (!msg)
8321                 return;
8322
8323         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8324         if (!hdr) {
8325                 nlmsg_free(msg);
8326                 return;
8327         }
8328
8329         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8330             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8331             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8332                 goto nla_put_failure;
8333
8334         genlmsg_end(msg, hdr);
8335
8336         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8337                                 nl80211_mlme_mcgrp.id, gfp);
8338         return;
8339
8340  nla_put_failure:
8341         genlmsg_cancel(msg, hdr);
8342         nlmsg_free(msg);
8343 }
8344
8345 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
8346                 struct net_device *netdev,
8347                 const u8 *macaddr, const u8* ie, u8 ie_len,
8348                 gfp_t gfp)
8349 {
8350         struct sk_buff *msg;
8351         void *hdr;
8352
8353         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8354         if (!msg)
8355                 return;
8356
8357         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
8358         if (!hdr) {
8359                 nlmsg_free(msg);
8360                 return;
8361         }
8362
8363         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8364             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8365             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
8366             (ie_len && ie &&
8367              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
8368                 goto nla_put_failure;
8369
8370         genlmsg_end(msg, hdr);
8371
8372         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8373                                 nl80211_mlme_mcgrp.id, gfp);
8374         return;
8375
8376  nla_put_failure:
8377         genlmsg_cancel(msg, hdr);
8378         nlmsg_free(msg);
8379 }
8380
8381 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
8382                                  struct net_device *netdev, const u8 *addr,
8383                                  enum nl80211_key_type key_type, int key_id,
8384                                  const u8 *tsc, gfp_t gfp)
8385 {
8386         struct sk_buff *msg;
8387         void *hdr;
8388
8389         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8390         if (!msg)
8391                 return;
8392
8393         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
8394         if (!hdr) {
8395                 nlmsg_free(msg);
8396                 return;
8397         }
8398
8399         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8400             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8401             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
8402             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
8403             (key_id != -1 &&
8404              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
8405             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
8406                 goto nla_put_failure;
8407
8408         genlmsg_end(msg, hdr);
8409
8410         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8411                                 nl80211_mlme_mcgrp.id, gfp);
8412         return;
8413
8414  nla_put_failure:
8415         genlmsg_cancel(msg, hdr);
8416         nlmsg_free(msg);
8417 }
8418
8419 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8420                                     struct ieee80211_channel *channel_before,
8421                                     struct ieee80211_channel *channel_after)
8422 {
8423         struct sk_buff *msg;
8424         void *hdr;
8425         struct nlattr *nl_freq;
8426
8427         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8428         if (!msg)
8429                 return;
8430
8431         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8432         if (!hdr) {
8433                 nlmsg_free(msg);
8434                 return;
8435         }
8436
8437         /*
8438          * Since we are applying the beacon hint to a wiphy we know its
8439          * wiphy_idx is valid
8440          */
8441         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8442                 goto nla_put_failure;
8443
8444         /* Before */
8445         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8446         if (!nl_freq)
8447                 goto nla_put_failure;
8448         if (nl80211_msg_put_channel(msg, channel_before))
8449                 goto nla_put_failure;
8450         nla_nest_end(msg, nl_freq);
8451
8452         /* After */
8453         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8454         if (!nl_freq)
8455                 goto nla_put_failure;
8456         if (nl80211_msg_put_channel(msg, channel_after))
8457                 goto nla_put_failure;
8458         nla_nest_end(msg, nl_freq);
8459
8460         genlmsg_end(msg, hdr);
8461
8462         rcu_read_lock();
8463         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8464                                 GFP_ATOMIC);
8465         rcu_read_unlock();
8466
8467         return;
8468
8469 nla_put_failure:
8470         genlmsg_cancel(msg, hdr);
8471         nlmsg_free(msg);
8472 }
8473
8474 static void nl80211_send_remain_on_chan_event(
8475         int cmd, struct cfg80211_registered_device *rdev,
8476         struct wireless_dev *wdev, u64 cookie,
8477         struct ieee80211_channel *chan,
8478         unsigned int duration, gfp_t gfp)
8479 {
8480         struct sk_buff *msg;
8481         void *hdr;
8482
8483         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8484         if (!msg)
8485                 return;
8486
8487         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8488         if (!hdr) {
8489                 nlmsg_free(msg);
8490                 return;
8491         }
8492
8493         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8494             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8495                                          wdev->netdev->ifindex)) ||
8496             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8497             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8498             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
8499                         NL80211_CHAN_NO_HT) ||
8500             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8501                 goto nla_put_failure;
8502
8503         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8504             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8505                 goto nla_put_failure;
8506
8507         genlmsg_end(msg, hdr);
8508
8509         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8510                                 nl80211_mlme_mcgrp.id, gfp);
8511         return;
8512
8513  nla_put_failure:
8514         genlmsg_cancel(msg, hdr);
8515         nlmsg_free(msg);
8516 }
8517
8518 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8519                                     struct wireless_dev *wdev, u64 cookie,
8520                                     struct ieee80211_channel *chan,
8521                                     unsigned int duration, gfp_t gfp)
8522 {
8523         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8524                                           rdev, wdev, cookie, chan,
8525                                           duration, gfp);
8526 }
8527
8528 void nl80211_send_remain_on_channel_cancel(
8529         struct cfg80211_registered_device *rdev,
8530         struct wireless_dev *wdev,
8531         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
8532 {
8533         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8534                                           rdev, wdev, cookie, chan, 0, gfp);
8535 }
8536
8537 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8538                             struct net_device *dev, const u8 *mac_addr,
8539                             struct station_info *sinfo, gfp_t gfp)
8540 {
8541         struct sk_buff *msg;
8542
8543         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8544         if (!msg)
8545                 return;
8546
8547         if (nl80211_send_station(msg, 0, 0, 0,
8548                                  rdev, dev, mac_addr, sinfo) < 0) {
8549                 nlmsg_free(msg);
8550                 return;
8551         }
8552
8553         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8554                                 nl80211_mlme_mcgrp.id, gfp);
8555 }
8556
8557 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8558                                 struct net_device *dev, const u8 *mac_addr,
8559                                 gfp_t gfp)
8560 {
8561         struct sk_buff *msg;
8562         void *hdr;
8563
8564         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8565         if (!msg)
8566                 return;
8567
8568         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8569         if (!hdr) {
8570                 nlmsg_free(msg);
8571                 return;
8572         }
8573
8574         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8575             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8576                 goto nla_put_failure;
8577
8578         genlmsg_end(msg, hdr);
8579
8580         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8581                                 nl80211_mlme_mcgrp.id, gfp);
8582         return;
8583
8584  nla_put_failure:
8585         genlmsg_cancel(msg, hdr);
8586         nlmsg_free(msg);
8587 }
8588
8589 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
8590                                     struct net_device *dev, const u8 *mac_addr,
8591                                     enum nl80211_connect_failed_reason reason,
8592                                     gfp_t gfp)
8593 {
8594         struct sk_buff *msg;
8595         void *hdr;
8596
8597         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8598         if (!msg)
8599                 return;
8600
8601         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
8602         if (!hdr) {
8603                 nlmsg_free(msg);
8604                 return;
8605         }
8606
8607         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8608             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
8609             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
8610                 goto nla_put_failure;
8611
8612         genlmsg_end(msg, hdr);
8613
8614         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8615                                 nl80211_mlme_mcgrp.id, gfp);
8616         return;
8617
8618  nla_put_failure:
8619         genlmsg_cancel(msg, hdr);
8620         nlmsg_free(msg);
8621 }
8622
8623 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8624                                        const u8 *addr, gfp_t gfp)
8625 {
8626         struct wireless_dev *wdev = dev->ieee80211_ptr;
8627         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8628         struct sk_buff *msg;
8629         void *hdr;
8630         int err;
8631         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
8632
8633         if (!nlportid)
8634                 return false;
8635
8636         msg = nlmsg_new(100, gfp);
8637         if (!msg)
8638                 return true;
8639
8640         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8641         if (!hdr) {
8642                 nlmsg_free(msg);
8643                 return true;
8644         }
8645
8646         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8647             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8648             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8649                 goto nla_put_failure;
8650
8651         err = genlmsg_end(msg, hdr);
8652         if (err < 0) {
8653                 nlmsg_free(msg);
8654                 return true;
8655         }
8656
8657         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8658         return true;
8659
8660  nla_put_failure:
8661         genlmsg_cancel(msg, hdr);
8662         nlmsg_free(msg);
8663         return true;
8664 }
8665
8666 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8667 {
8668         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8669                                           addr, gfp);
8670 }
8671
8672 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8673                                     const u8 *addr, gfp_t gfp)
8674 {
8675         return __nl80211_unexpected_frame(dev,
8676                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8677                                           addr, gfp);
8678 }
8679
8680 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8681                       struct wireless_dev *wdev, u32 nlportid,
8682                       int freq, int sig_dbm,
8683                       const u8 *buf, size_t len, gfp_t gfp)
8684 {
8685         struct net_device *netdev = wdev->netdev;
8686         struct sk_buff *msg;
8687         void *hdr;
8688
8689         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8690         if (!msg)
8691                 return -ENOMEM;
8692
8693         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8694         if (!hdr) {
8695                 nlmsg_free(msg);
8696                 return -ENOMEM;
8697         }
8698
8699         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8700             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8701                                         netdev->ifindex)) ||
8702             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8703             (sig_dbm &&
8704              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8705             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8706                 goto nla_put_failure;
8707
8708         genlmsg_end(msg, hdr);
8709
8710         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8711
8712  nla_put_failure:
8713         genlmsg_cancel(msg, hdr);
8714         nlmsg_free(msg);
8715         return -ENOBUFS;
8716 }
8717
8718 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8719                                  struct wireless_dev *wdev, u64 cookie,
8720                                  const u8 *buf, size_t len, bool ack,
8721                                  gfp_t gfp)
8722 {
8723         struct net_device *netdev = wdev->netdev;
8724         struct sk_buff *msg;
8725         void *hdr;
8726
8727         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8728         if (!msg)
8729                 return;
8730
8731         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8732         if (!hdr) {
8733                 nlmsg_free(msg);
8734                 return;
8735         }
8736
8737         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8738             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8739                                    netdev->ifindex)) ||
8740             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8741             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8742             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8743                 goto nla_put_failure;
8744
8745         genlmsg_end(msg, hdr);
8746
8747         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8748         return;
8749
8750  nla_put_failure:
8751         genlmsg_cancel(msg, hdr);
8752         nlmsg_free(msg);
8753 }
8754
8755 void
8756 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8757                              struct net_device *netdev,
8758                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8759                              gfp_t gfp)
8760 {
8761         struct sk_buff *msg;
8762         struct nlattr *pinfoattr;
8763         void *hdr;
8764
8765         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8766         if (!msg)
8767                 return;
8768
8769         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8770         if (!hdr) {
8771                 nlmsg_free(msg);
8772                 return;
8773         }
8774
8775         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8776             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8777                 goto nla_put_failure;
8778
8779         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8780         if (!pinfoattr)
8781                 goto nla_put_failure;
8782
8783         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8784                         rssi_event))
8785                 goto nla_put_failure;
8786
8787         nla_nest_end(msg, pinfoattr);
8788
8789         genlmsg_end(msg, hdr);
8790
8791         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8792                                 nl80211_mlme_mcgrp.id, gfp);
8793         return;
8794
8795  nla_put_failure:
8796         genlmsg_cancel(msg, hdr);
8797         nlmsg_free(msg);
8798 }
8799
8800 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8801                               struct net_device *netdev, const u8 *bssid,
8802                               const u8 *replay_ctr, gfp_t gfp)
8803 {
8804         struct sk_buff *msg;
8805         struct nlattr *rekey_attr;
8806         void *hdr;
8807
8808         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8809         if (!msg)
8810                 return;
8811
8812         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8813         if (!hdr) {
8814                 nlmsg_free(msg);
8815                 return;
8816         }
8817
8818         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8819             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8820             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8821                 goto nla_put_failure;
8822
8823         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8824         if (!rekey_attr)
8825                 goto nla_put_failure;
8826
8827         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8828                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8829                 goto nla_put_failure;
8830
8831         nla_nest_end(msg, rekey_attr);
8832
8833         genlmsg_end(msg, hdr);
8834
8835         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8836                                 nl80211_mlme_mcgrp.id, gfp);
8837         return;
8838
8839  nla_put_failure:
8840         genlmsg_cancel(msg, hdr);
8841         nlmsg_free(msg);
8842 }
8843
8844 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8845                                     struct net_device *netdev, int index,
8846                                     const u8 *bssid, bool preauth, gfp_t gfp)
8847 {
8848         struct sk_buff *msg;
8849         struct nlattr *attr;
8850         void *hdr;
8851
8852         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8853         if (!msg)
8854                 return;
8855
8856         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8857         if (!hdr) {
8858                 nlmsg_free(msg);
8859                 return;
8860         }
8861
8862         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8863             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8864                 goto nla_put_failure;
8865
8866         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8867         if (!attr)
8868                 goto nla_put_failure;
8869
8870         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8871             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8872             (preauth &&
8873              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8874                 goto nla_put_failure;
8875
8876         nla_nest_end(msg, attr);
8877
8878         genlmsg_end(msg, hdr);
8879
8880         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8881                                 nl80211_mlme_mcgrp.id, gfp);
8882         return;
8883
8884  nla_put_failure:
8885         genlmsg_cancel(msg, hdr);
8886         nlmsg_free(msg);
8887 }
8888
8889 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8890                               struct net_device *netdev,
8891                               struct cfg80211_chan_def *chandef, gfp_t gfp)
8892 {
8893         struct sk_buff *msg;
8894         void *hdr;
8895
8896         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8897         if (!msg)
8898                 return;
8899
8900         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8901         if (!hdr) {
8902                 nlmsg_free(msg);
8903                 return;
8904         }
8905
8906         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8907                 goto nla_put_failure;
8908
8909         if (nl80211_send_chandef(msg, chandef))
8910                 goto nla_put_failure;
8911
8912         genlmsg_end(msg, hdr);
8913
8914         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8915                                 nl80211_mlme_mcgrp.id, gfp);
8916         return;
8917
8918  nla_put_failure:
8919         genlmsg_cancel(msg, hdr);
8920         nlmsg_free(msg);
8921 }
8922
8923 void
8924 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
8925                             struct net_device *netdev, const u8 *peer,
8926                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
8927 {
8928         struct sk_buff *msg;
8929         struct nlattr *pinfoattr;
8930         void *hdr;
8931
8932         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8933         if (!msg)
8934                 return;
8935
8936         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8937         if (!hdr) {
8938                 nlmsg_free(msg);
8939                 return;
8940         }
8941
8942         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8943             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8944             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8945                 goto nla_put_failure;
8946
8947         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8948         if (!pinfoattr)
8949                 goto nla_put_failure;
8950
8951         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
8952                 goto nla_put_failure;
8953
8954         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
8955                 goto nla_put_failure;
8956
8957         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
8958                 goto nla_put_failure;
8959
8960         nla_nest_end(msg, pinfoattr);
8961
8962         genlmsg_end(msg, hdr);
8963
8964         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8965                                 nl80211_mlme_mcgrp.id, gfp);
8966         return;
8967
8968  nla_put_failure:
8969         genlmsg_cancel(msg, hdr);
8970         nlmsg_free(msg);
8971 }
8972
8973 void
8974 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8975                                 struct net_device *netdev, const u8 *peer,
8976                                 u32 num_packets, gfp_t gfp)
8977 {
8978         struct sk_buff *msg;
8979         struct nlattr *pinfoattr;
8980         void *hdr;
8981
8982         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8983         if (!msg)
8984                 return;
8985
8986         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8987         if (!hdr) {
8988                 nlmsg_free(msg);
8989                 return;
8990         }
8991
8992         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8993             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8994             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8995                 goto nla_put_failure;
8996
8997         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8998         if (!pinfoattr)
8999                 goto nla_put_failure;
9000
9001         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9002                 goto nla_put_failure;
9003
9004         nla_nest_end(msg, pinfoattr);
9005
9006         genlmsg_end(msg, hdr);
9007
9008         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9009                                 nl80211_mlme_mcgrp.id, gfp);
9010         return;
9011
9012  nla_put_failure:
9013         genlmsg_cancel(msg, hdr);
9014         nlmsg_free(msg);
9015 }
9016
9017 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9018                            u64 cookie, bool acked, gfp_t gfp)
9019 {
9020         struct wireless_dev *wdev = dev->ieee80211_ptr;
9021         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9022         struct sk_buff *msg;
9023         void *hdr;
9024         int err;
9025
9026         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9027
9028         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9029
9030         if (!msg)
9031                 return;
9032
9033         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9034         if (!hdr) {
9035                 nlmsg_free(msg);
9036                 return;
9037         }
9038
9039         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9040             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9041             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9042             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9043             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9044                 goto nla_put_failure;
9045
9046         err = genlmsg_end(msg, hdr);
9047         if (err < 0) {
9048                 nlmsg_free(msg);
9049                 return;
9050         }
9051
9052         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9053                                 nl80211_mlme_mcgrp.id, gfp);
9054         return;
9055
9056  nla_put_failure:
9057         genlmsg_cancel(msg, hdr);
9058         nlmsg_free(msg);
9059 }
9060 EXPORT_SYMBOL(cfg80211_probe_status);
9061
9062 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9063                                  const u8 *frame, size_t len,
9064                                  int freq, int sig_dbm)
9065 {
9066         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9067         struct sk_buff *msg;
9068         void *hdr;
9069         struct cfg80211_beacon_registration *reg;
9070
9071         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9072
9073         spin_lock_bh(&rdev->beacon_registrations_lock);
9074         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9075                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9076                 if (!msg) {
9077                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9078                         return;
9079                 }
9080
9081                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9082                 if (!hdr)
9083                         goto nla_put_failure;
9084
9085                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9086                     (freq &&
9087                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9088                     (sig_dbm &&
9089                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9090                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9091                         goto nla_put_failure;
9092
9093                 genlmsg_end(msg, hdr);
9094
9095                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9096         }
9097         spin_unlock_bh(&rdev->beacon_registrations_lock);
9098         return;
9099
9100  nla_put_failure:
9101         spin_unlock_bh(&rdev->beacon_registrations_lock);
9102         if (hdr)
9103                 genlmsg_cancel(msg, hdr);
9104         nlmsg_free(msg);
9105 }
9106 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9107
9108 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9109                                 enum nl80211_tdls_operation oper,
9110                                 u16 reason_code, gfp_t gfp)
9111 {
9112         struct wireless_dev *wdev = dev->ieee80211_ptr;
9113         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9114         struct sk_buff *msg;
9115         void *hdr;
9116         int err;
9117
9118         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9119                                          reason_code);
9120
9121         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9122         if (!msg)
9123                 return;
9124
9125         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9126         if (!hdr) {
9127                 nlmsg_free(msg);
9128                 return;
9129         }
9130
9131         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9132             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9133             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9134             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9135             (reason_code > 0 &&
9136              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9137                 goto nla_put_failure;
9138
9139         err = genlmsg_end(msg, hdr);
9140         if (err < 0) {
9141                 nlmsg_free(msg);
9142                 return;
9143         }
9144
9145         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9146                                 nl80211_mlme_mcgrp.id, gfp);
9147         return;
9148
9149  nla_put_failure:
9150         genlmsg_cancel(msg, hdr);
9151         nlmsg_free(msg);
9152 }
9153 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9154
9155 static int nl80211_netlink_notify(struct notifier_block * nb,
9156                                   unsigned long state,
9157                                   void *_notify)
9158 {
9159         struct netlink_notify *notify = _notify;
9160         struct cfg80211_registered_device *rdev;
9161         struct wireless_dev *wdev;
9162         struct cfg80211_beacon_registration *reg, *tmp;
9163
9164         if (state != NETLINK_URELEASE)
9165                 return NOTIFY_DONE;
9166
9167         rcu_read_lock();
9168
9169         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9170                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9171                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
9172
9173                 spin_lock_bh(&rdev->beacon_registrations_lock);
9174                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
9175                                          list) {
9176                         if (reg->nlportid == notify->portid) {
9177                                 list_del(&reg->list);
9178                                 kfree(reg);
9179                                 break;
9180                         }
9181                 }
9182                 spin_unlock_bh(&rdev->beacon_registrations_lock);
9183         }
9184
9185         rcu_read_unlock();
9186
9187         return NOTIFY_DONE;
9188 }
9189
9190 static struct notifier_block nl80211_netlink_notifier = {
9191         .notifier_call = nl80211_netlink_notify,
9192 };
9193
9194 /* initialisation/exit functions */
9195
9196 int nl80211_init(void)
9197 {
9198         int err;
9199
9200         err = genl_register_family_with_ops(&nl80211_fam,
9201                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
9202         if (err)
9203                 return err;
9204
9205         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
9206         if (err)
9207                 goto err_out;
9208
9209         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
9210         if (err)
9211                 goto err_out;
9212
9213         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
9214         if (err)
9215                 goto err_out;
9216
9217         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
9218         if (err)
9219                 goto err_out;
9220
9221 #ifdef CONFIG_NL80211_TESTMODE
9222         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
9223         if (err)
9224                 goto err_out;
9225 #endif
9226
9227         err = netlink_register_notifier(&nl80211_netlink_notifier);
9228         if (err)
9229                 goto err_out;
9230
9231         return 0;
9232  err_out:
9233         genl_unregister_family(&nl80211_fam);
9234         return err;
9235 }
9236
9237 void nl80211_exit(void)
9238 {
9239         netlink_unregister_notifier(&nl80211_netlink_notifier);
9240         genl_unregister_family(&nl80211_fam);
9241 }