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
  26 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  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 /* internal helper: get rdev and dev */
  50 static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs,
  51                                    struct cfg80211_registered_device **rdev,
  52                                    struct net_device **dev)
  53 {
  54         int ifindex;
  55
  56         if (!attrs[NL80211_ATTR_IFINDEX])
  57                 return -EINVAL;
  58
  59         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  60         *dev = dev_get_by_index(netns, ifindex);
  61         if (!*dev)
  62                 return -ENODEV;
  63
  64         *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  65         if (IS_ERR(*rdev)) {
  66                 dev_put(*dev);
  67                 return PTR_ERR(*rdev);
  68         }
  69
  70         return 0;
  71 }
  72
  73 /* policy for the attributes */
  74 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  75         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  77                                       .len = 20-1 },
  78         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  79         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  81         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  82         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  83         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  84         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  85         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  86
  87         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  88         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  89         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  90
  91         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
  92         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
  93
  94         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  95         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  96                                     .len = WLAN_MAX_KEY_LEN },
  97         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  98         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  99         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 100         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 101         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 102
 103         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 104         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 105         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 106                                        .len = IEEE80211_MAX_DATA_LEN },
 107         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 108                                        .len = IEEE80211_MAX_DATA_LEN },
 109         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 110         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 111         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 112         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 113                                                .len = NL80211_MAX_SUPP_RATES },
 114         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 115         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 116         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 117         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 118                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 119         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 120
 121         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 122         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 123
 124         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 125         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 126         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 127         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 128                                            .len = NL80211_MAX_SUPP_RATES },
 129         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 130
 131         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 132         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 133
 134         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 135
 136         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 137         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 138                               .len = IEEE80211_MAX_DATA_LEN },
 139         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 140         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 141
 142         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 143                                 .len = IEEE80211_MAX_SSID_LEN },
 144         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 145         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 146         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 147         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 149         [NL80211_ATTR_STA_FLAGS2] = {
 150                 .len = sizeof(struct nl80211_sta_flag_update),
 151         },
 152         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 153         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 154         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 155         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 156         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 157         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 158         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 159         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 160         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 161                                  .len = WLAN_PMKID_LEN },
 162         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 163         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 164         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 165         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 166                                  .len = IEEE80211_MAX_DATA_LEN },
 167         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 168         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 170         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 171         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 172         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 174         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 175         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 176         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 178         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 179         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 180         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 181         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 182         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 183         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 184         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 185         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 186         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 187                                          .len = IEEE80211_MAX_DATA_LEN },
 188         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 189                                          .len = IEEE80211_MAX_DATA_LEN },
 190         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 191         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 192         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 193         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 194         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 195         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 196         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 197         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 198         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 199         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 200                                       .len = IEEE80211_MAX_DATA_LEN },
 201         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 202         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 203         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 204                 .len = NL80211_HT_CAPABILITY_LEN
 205         },
 206         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 207         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 208         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 209 };
 210
 211 /* policy for the key attributes */
 212 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 213         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 214         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 215         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 216         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 217         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 218         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 219         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 220         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 221 };
 222
 223 /* policy for the key default flags */
 224 static const struct nla_policy
 225 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 226         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 227         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 228 };
 229
 230 /* policy for WoWLAN attributes */
 231 static const struct nla_policy
 232 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 233         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 234         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 235         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 236         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 237         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 238         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 239         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 240         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 241 };
 242
 243 /* policy for GTK rekey offload attributes */
 244 static const struct nla_policy
 245 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 246         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 247         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 248         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 249 };
 250
 251 static const struct nla_policy
 252 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 253         [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
 254                                                  .len = IEEE80211_MAX_SSID_LEN },
 255 };
 256
 257 /* ifidx get helper */
 258 static int nl80211_get_ifidx(struct netlink_callback *cb)
 259 {
 260         int res;
 261
 262         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 263                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 264                           nl80211_policy);
 265         if (res)
 266                 return res;
 267
 268         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 269                 return -EINVAL;
 270
 271         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 272         if (!res)
 273                 return -EINVAL;
 274         return res;
 275 }
 276
 277 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 278                                        struct netlink_callback *cb,
 279                                        struct cfg80211_registered_device **rdev,
 280                                        struct net_device **dev)
 281 {
 282         int ifidx = cb->args[0];
 283         int err;
 284
 285         if (!ifidx)
 286                 ifidx = nl80211_get_ifidx(cb);
 287         if (ifidx < 0)
 288                 return ifidx;
 289
 290         cb->args[0] = ifidx;
 291
 292         rtnl_lock();
 293
 294         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 295         if (!*dev) {
 296                 err = -ENODEV;
 297                 goto out_rtnl;
 298         }
 299
 300         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 301         if (IS_ERR(*rdev)) {
 302                 err = PTR_ERR(*rdev);
 303                 goto out_rtnl;
 304         }
 305
 306         return 0;
 307  out_rtnl:
 308         rtnl_unlock();
 309         return err;
 310 }
 311
 312 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 313 {
 314         cfg80211_unlock_rdev(rdev);
 315         rtnl_unlock();
 316 }
 317
 318 /* IE validation */
 319 static bool is_valid_ie_attr(const struct nlattr *attr)
 320 {
 321         const u8 *pos;
 322         int len;
 323
 324         if (!attr)
 325                 return true;
 326
 327         pos = nla_data(attr);
 328         len = nla_len(attr);
 329
 330         while (len) {
 331                 u8 elemlen;
 332
 333                 if (len < 2)
 334                         return false;
 335                 len -= 2;
 336
 337                 elemlen = pos[1];
 338                 if (elemlen > len)
 339                         return false;
 340
 341                 len -= elemlen;
 342                 pos += 2 + elemlen;
 343         }
 344
 345         return true;
 346 }
 347
 348 /* message building helper */
 349 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 350                                    int flags, u8 cmd)
 351 {
 352         /* since there is no private header just add the generic one */
 353         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 354 }
 355
 356 static int nl80211_msg_put_channel(struct sk_buff *msg,
 357                                    struct ieee80211_channel *chan)
 358 {
 359         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 360                     chan->center_freq);
 361
 362         if (chan->flags & IEEE80211_CHAN_DISABLED)
 363                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 364         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 365                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 366         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 367                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 368         if (chan->flags & IEEE80211_CHAN_RADAR)
 369                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 370
 371         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 372                     DBM_TO_MBM(chan->max_power));
 373
 374         return 0;
 375
 376  nla_put_failure:
 377         return -ENOBUFS;
 378 }
 379
 380 /* netlink command implementations */
 381
 382 struct key_parse {
 383         struct key_params p;
 384         int idx;
 385         int type;
 386         bool def, defmgmt;
 387         bool def_uni, def_multi;
 388 };
 389
 390 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 391 {
 392         struct nlattr *tb[NL80211_KEY_MAX + 1];
 393         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 394                                    nl80211_key_policy);
 395         if (err)
 396                 return err;
 397
 398         k->def = !!tb[NL80211_KEY_DEFAULT];
 399         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 400
 401         if (k->def) {
 402                 k->def_uni = true;
 403                 k->def_multi = true;
 404         }
 405         if (k->defmgmt)
 406                 k->def_multi = true;
 407
 408         if (tb[NL80211_KEY_IDX])
 409                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 410
 411         if (tb[NL80211_KEY_DATA]) {
 412                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 413                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 414         }
 415
 416         if (tb[NL80211_KEY_SEQ]) {
 417                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 418                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 419         }
 420
 421         if (tb[NL80211_KEY_CIPHER])
 422                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 423
 424         if (tb[NL80211_KEY_TYPE]) {
 425                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 426                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 427                         return -EINVAL;
 428         }
 429
 430         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 431                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 432                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 433                                        tb[NL80211_KEY_DEFAULT_TYPES],
 434                                        nl80211_key_default_policy);
 435                 if (err)
 436                         return err;
 437
 438                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 439                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 446 {
 447         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 448                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 449                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 450         }
 451
 452         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 453                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 454                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 455         }
 456
 457         if (info->attrs[NL80211_ATTR_KEY_IDX])
 458                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 459
 460         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 461                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 462
 463         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 464         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 465
 466         if (k->def) {
 467                 k->def_uni = true;
 468                 k->def_multi = true;
 469         }
 470         if (k->defmgmt)
 471                 k->def_multi = true;
 472
 473         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 474                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 475                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 476                         return -EINVAL;
 477         }
 478
 479         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 480                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 481                 int err = nla_parse_nested(
 482                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 483                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 484                                 nl80211_key_default_policy);
 485                 if (err)
 486                         return err;
 487
 488                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 489                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 490         }
 491
 492         return 0;
 493 }
 494
 495 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 496 {
 497         int err;
 498
 499         memset(k, 0, sizeof(*k));
 500         k->idx = -1;
 501         k->type = -1;
 502
 503         if (info->attrs[NL80211_ATTR_KEY])
 504                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 505         else
 506                 err = nl80211_parse_key_old(info, k);
 507
 508         if (err)
 509                 return err;
 510
 511         if (k->def && k->defmgmt)
 512                 return -EINVAL;
 513
 514         if (k->defmgmt) {
 515                 if (k->def_uni || !k->def_multi)
 516                         return -EINVAL;
 517         }
 518
 519         if (k->idx != -1) {
 520                 if (k->defmgmt) {
 521                         if (k->idx < 4 || k->idx > 5)
 522                                 return -EINVAL;
 523                 } else if (k->def) {
 524                         if (k->idx < 0 || k->idx > 3)
 525                                 return -EINVAL;
 526                 } else {
 527                         if (k->idx < 0 || k->idx > 5)
 528                                 return -EINVAL;
 529                 }
 530         }
 531
 532         return 0;
 533 }
 534
 535 static struct cfg80211_cached_keys *
 536 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 537                        struct nlattr *keys)
 538 {
 539         struct key_parse parse;
 540         struct nlattr *key;
 541         struct cfg80211_cached_keys *result;
 542         int rem, err, def = 0;
 543
 544         result = kzalloc(sizeof(*result), GFP_KERNEL);
 545         if (!result)
 546                 return ERR_PTR(-ENOMEM);
 547
 548         result->def = -1;
 549         result->defmgmt = -1;
 550
 551         nla_for_each_nested(key, keys, rem) {
 552                 memset(&parse, 0, sizeof(parse));
 553                 parse.idx = -1;
 554
 555                 err = nl80211_parse_key_new(key, &parse);
 556                 if (err)
 557                         goto error;
 558                 err = -EINVAL;
 559                 if (!parse.p.key)
 560                         goto error;
 561                 if (parse.idx < 0 || parse.idx > 4)
 562                         goto error;
 563                 if (parse.def) {
 564                         if (def)
 565                                 goto error;
 566                         def = 1;
 567                         result->def = parse.idx;
 568                         if (!parse.def_uni || !parse.def_multi)
 569                                 goto error;
 570                 } else if (parse.defmgmt)
 571                         goto error;
 572                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 573                                                      parse.idx, false, NULL);
 574                 if (err)
 575                         goto error;
 576                 result->params[parse.idx].cipher = parse.p.cipher;
 577                 result->params[parse.idx].key_len = parse.p.key_len;
 578                 result->params[parse.idx].key = result->data[parse.idx];
 579                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 580         }
 581
 582         return result;
 583  error:
 584         kfree(result);
 585         return ERR_PTR(err);
 586 }
 587
 588 static int nl80211_key_allowed(struct wireless_dev *wdev)
 589 {
 590         ASSERT_WDEV_LOCK(wdev);
 591
 592         switch (wdev->iftype) {
 593         case NL80211_IFTYPE_AP:
 594         case NL80211_IFTYPE_AP_VLAN:
 595         case NL80211_IFTYPE_P2P_GO:
 596         case NL80211_IFTYPE_MESH_POINT:
 597                 break;
 598         case NL80211_IFTYPE_ADHOC:
 599                 if (!wdev->current_bss)
 600                         return -ENOLINK;
 601                 break;
 602         case NL80211_IFTYPE_STATION:
 603         case NL80211_IFTYPE_P2P_CLIENT:
 604                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 605                         return -ENOLINK;
 606                 break;
 607         default:
 608                 return -EINVAL;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 615 {
 616         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 617         int i;
 618
 619         if (!nl_modes)
 620                 goto nla_put_failure;
 621
 622         i = 0;
 623         while (ifmodes) {
 624                 if (ifmodes & 1)
 625                         NLA_PUT_FLAG(msg, i);
 626                 ifmodes >>= 1;
 627                 i++;
 628         }
 629
 630         nla_nest_end(msg, nl_modes);
 631         return 0;
 632
 633 nla_put_failure:
 634         return -ENOBUFS;
 635 }
 636
 637 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 638                                           struct sk_buff *msg)
 639 {
 640         struct nlattr *nl_combis;
 641         int i, j;
 642
 643         nl_combis = nla_nest_start(msg,
 644                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 645         if (!nl_combis)
 646                 goto nla_put_failure;
 647
 648         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 649                 const struct ieee80211_iface_combination *c;
 650                 struct nlattr *nl_combi, *nl_limits;
 651
 652                 c = &wiphy->iface_combinations[i];
 653
 654                 nl_combi = nla_nest_start(msg, i + 1);
 655                 if (!nl_combi)
 656                         goto nla_put_failure;
 657
 658                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 659                 if (!nl_limits)
 660                         goto nla_put_failure;
 661
 662                 for (j = 0; j < c->n_limits; j++) {
 663                         struct nlattr *nl_limit;
 664
 665                         nl_limit = nla_nest_start(msg, j + 1);
 666                         if (!nl_limit)
 667                                 goto nla_put_failure;
 668                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 669                                     c->limits[j].max);
 670                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 671                                                 c->limits[j].types))
 672                                 goto nla_put_failure;
 673                         nla_nest_end(msg, nl_limit);
 674                 }
 675
 676                 nla_nest_end(msg, nl_limits);
 677
 678                 if (c->beacon_int_infra_match)
 679                         NLA_PUT_FLAG(msg,
 680                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 681                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 682                             c->num_different_channels);
 683                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 684                             c->max_interfaces);
 685
 686                 nla_nest_end(msg, nl_combi);
 687         }
 688
 689         nla_nest_end(msg, nl_combis);
 690
 691         return 0;
 692 nla_put_failure:
 693         return -ENOBUFS;
 694 }
 695
 696 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 697                               struct cfg80211_registered_device *dev)
 698 {
 699         void *hdr;
 700         struct nlattr *nl_bands, *nl_band;
 701         struct nlattr *nl_freqs, *nl_freq;
 702         struct nlattr *nl_rates, *nl_rate;
 703         struct nlattr *nl_cmds;
 704         enum ieee80211_band band;
 705         struct ieee80211_channel *chan;
 706         struct ieee80211_rate *rate;
 707         int i;
 708         const struct ieee80211_txrx_stypes *mgmt_stypes =
 709                                 dev->wiphy.mgmt_stypes;
 710
 711         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 712         if (!hdr)
 713                 return -1;
 714
 715         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 716         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 717
 718         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 719                     cfg80211_rdev_list_generation);
 720
 721         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 722                    dev->wiphy.retry_short);
 723         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 724                    dev->wiphy.retry_long);
 725         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 726                     dev->wiphy.frag_threshold);
 727         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 728                     dev->wiphy.rts_threshold);
 729         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 730                     dev->wiphy.coverage_class);
 731         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 732                    dev->wiphy.max_scan_ssids);
 733         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 734                    dev->wiphy.max_sched_scan_ssids);
 735         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 736                     dev->wiphy.max_scan_ie_len);
 737         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 738                     dev->wiphy.max_sched_scan_ie_len);
 739         NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 740                    dev->wiphy.max_match_sets);
 741
 742         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 743                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 744         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 745                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 746         if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
 747                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
 748         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 749                 NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
 750         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
 751                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
 752         if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
 753                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
 754
 755         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 756                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 757                 dev->wiphy.cipher_suites);
 758
 759         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 760                    dev->wiphy.max_num_pmkids);
 761
 762         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 763                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 764
 765         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 766                     dev->wiphy.available_antennas_tx);
 767         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 768                     dev->wiphy.available_antennas_rx);
 769
 770         if (dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD)
 771                 NLA_PUT_U32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 772                             dev->wiphy.probe_resp_offload);
 773
 774         if ((dev->wiphy.available_antennas_tx ||
 775              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 776                 u32 tx_ant = 0, rx_ant = 0;
 777                 int res;
 778                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 779                 if (!res) {
 780                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 781                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 782                 }
 783         }
 784
 785         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 786                                 dev->wiphy.interface_modes))
 787                 goto nla_put_failure;
 788
 789         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 790         if (!nl_bands)
 791                 goto nla_put_failure;
 792
 793         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 794                 if (!dev->wiphy.bands[band])
 795                         continue;
 796
 797                 nl_band = nla_nest_start(msg, band);
 798                 if (!nl_band)
 799                         goto nla_put_failure;
 800
 801                 /* add HT info */
 802                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 803                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 804                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 805                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 806                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 807                                 dev->wiphy.bands[band]->ht_cap.cap);
 808                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 809                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 810                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 811                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 812                 }
 813
 814                 /* add frequencies */
 815                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 816                 if (!nl_freqs)
 817                         goto nla_put_failure;
 818
 819                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 820                         nl_freq = nla_nest_start(msg, i);
 821                         if (!nl_freq)
 822                                 goto nla_put_failure;
 823
 824                         chan = &dev->wiphy.bands[band]->channels[i];
 825
 826                         if (nl80211_msg_put_channel(msg, chan))
 827                                 goto nla_put_failure;
 828
 829                         nla_nest_end(msg, nl_freq);
 830                 }
 831
 832                 nla_nest_end(msg, nl_freqs);
 833
 834                 /* add bitrates */
 835                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 836                 if (!nl_rates)
 837                         goto nla_put_failure;
 838
 839                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 840                         nl_rate = nla_nest_start(msg, i);
 841                         if (!nl_rate)
 842                                 goto nla_put_failure;
 843
 844                         rate = &dev->wiphy.bands[band]->bitrates[i];
 845                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 846                                     rate->bitrate);
 847                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 848                                 NLA_PUT_FLAG(msg,
 849                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 850
 851                         nla_nest_end(msg, nl_rate);
 852                 }
 853
 854                 nla_nest_end(msg, nl_rates);
 855
 856                 nla_nest_end(msg, nl_band);
 857         }
 858         nla_nest_end(msg, nl_bands);
 859
 860         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 861         if (!nl_cmds)
 862                 goto nla_put_failure;
 863
 864         i = 0;
 865 #define CMD(op, n)                                              \
 866          do {                                                   \
 867                 if (dev->ops->op) {                             \
 868                         i++;                                    \
 869                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 870                 }                                               \
 871         } while (0)
 872
 873         CMD(add_virtual_intf, NEW_INTERFACE);
 874         CMD(change_virtual_intf, SET_INTERFACE);
 875         CMD(add_key, NEW_KEY);
 876         CMD(start_ap, START_AP);
 877         CMD(add_station, NEW_STATION);
 878         CMD(add_mpath, NEW_MPATH);
 879         CMD(update_mesh_config, SET_MESH_CONFIG);
 880         CMD(change_bss, SET_BSS);
 881         CMD(auth, AUTHENTICATE);
 882         CMD(assoc, ASSOCIATE);
 883         CMD(deauth, DEAUTHENTICATE);
 884         CMD(disassoc, DISASSOCIATE);
 885         CMD(join_ibss, JOIN_IBSS);
 886         CMD(join_mesh, JOIN_MESH);
 887         CMD(set_pmksa, SET_PMKSA);
 888         CMD(del_pmksa, DEL_PMKSA);
 889         CMD(flush_pmksa, FLUSH_PMKSA);
 890         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 891                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 892         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 893         CMD(mgmt_tx, FRAME);
 894         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 895         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 896                 i++;
 897                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 898         }
 899         CMD(set_channel, SET_CHANNEL);
 900         CMD(set_wds_peer, SET_WDS_PEER);
 901         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 902                 CMD(tdls_mgmt, TDLS_MGMT);
 903                 CMD(tdls_oper, TDLS_OPER);
 904         }
 905         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 906                 CMD(sched_scan_start, START_SCHED_SCAN);
 907         CMD(probe_client, PROBE_CLIENT);
 908         CMD(set_noack_map, SET_NOACK_MAP);
 909         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 910                 i++;
 911                 NLA_PUT_U32(msg, i, NL80211_CMD_REGISTER_BEACONS);
 912         }
 913
 914 #ifdef CONFIG_NL80211_TESTMODE
 915         CMD(testmode_cmd, TESTMODE);
 916 #endif
 917
 918 #undef CMD
 919
 920         if (dev->ops->connect || dev->ops->auth) {
 921                 i++;
 922                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 923         }
 924
 925         if (dev->ops->disconnect || dev->ops->deauth) {
 926                 i++;
 927                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 928         }
 929
 930         nla_nest_end(msg, nl_cmds);
 931
 932         if (dev->ops->remain_on_channel &&
 933             dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 934                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 935                             dev->wiphy.max_remain_on_channel_duration);
 936
 937         if (dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX)
 938                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 939
 940         if (mgmt_stypes) {
 941                 u16 stypes;
 942                 struct nlattr *nl_ftypes, *nl_ifs;
 943                 enum nl80211_iftype ift;
 944
 945                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 946                 if (!nl_ifs)
 947                         goto nla_put_failure;
 948
 949                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 950                         nl_ftypes = nla_nest_start(msg, ift);
 951                         if (!nl_ftypes)
 952                                 goto nla_put_failure;
 953                         i = 0;
 954                         stypes = mgmt_stypes[ift].tx;
 955                         while (stypes) {
 956                                 if (stypes & 1)
 957                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 958                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 959                                 stypes >>= 1;
 960                                 i++;
 961                         }
 962                         nla_nest_end(msg, nl_ftypes);
 963                 }
 964
 965                 nla_nest_end(msg, nl_ifs);
 966
 967                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 968                 if (!nl_ifs)
 969                         goto nla_put_failure;
 970
 971                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 972                         nl_ftypes = nla_nest_start(msg, ift);
 973                         if (!nl_ftypes)
 974                                 goto nla_put_failure;
 975                         i = 0;
 976                         stypes = mgmt_stypes[ift].rx;
 977                         while (stypes) {
 978                                 if (stypes & 1)
 979                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 980                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 981                                 stypes >>= 1;
 982                                 i++;
 983                         }
 984                         nla_nest_end(msg, nl_ftypes);
 985                 }
 986                 nla_nest_end(msg, nl_ifs);
 987         }
 988
 989         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 990                 struct nlattr *nl_wowlan;
 991
 992                 nl_wowlan = nla_nest_start(msg,
 993                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 994                 if (!nl_wowlan)
 995                         goto nla_put_failure;
 996
 997                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 998                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 999                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
1000                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
1001                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
1002                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
1003                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
1004                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
1005                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
1006                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
1007                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
1008                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
1009                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
1010                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
1011                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
1012                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
1013                 if (dev->wiphy.wowlan.n_patterns) {
1014                         struct nl80211_wowlan_pattern_support pat = {
1015                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1016                                 .min_pattern_len =
1017                                         dev->wiphy.wowlan.pattern_min_len,
1018                                 .max_pattern_len =
1019                                         dev->wiphy.wowlan.pattern_max_len,
1020                         };
1021                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1022                                 sizeof(pat), &pat);
1023                 }
1024
1025                 nla_nest_end(msg, nl_wowlan);
1026         }
1027
1028         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1029                                 dev->wiphy.software_iftypes))
1030                 goto nla_put_failure;
1031
1032         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1033                 goto nla_put_failure;
1034
1035         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME)
1036                 NLA_PUT_U32(msg, NL80211_ATTR_DEVICE_AP_SME,
1037                             dev->wiphy.ap_sme_capa);
1038
1039         NLA_PUT_U32(msg, NL80211_ATTR_FEATURE_FLAGS, dev->wiphy.features);
1040
1041         if (dev->wiphy.ht_capa_mod_mask)
1042                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1043                         sizeof(*dev->wiphy.ht_capa_mod_mask),
1044                         dev->wiphy.ht_capa_mod_mask);
1045
1046         return genlmsg_end(msg, hdr);
1047
1048  nla_put_failure:
1049         genlmsg_cancel(msg, hdr);
1050         return -EMSGSIZE;
1051 }
1052
1053 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1054 {
1055         int idx = 0;
1056         int start = cb->args[0];
1057         struct cfg80211_registered_device *dev;
1058
1059         mutex_lock(&cfg80211_mutex);
1060         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1061                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1062                         continue;
1063                 if (++idx <= start)
1064                         continue;
1065                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1066                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1067                                        dev) < 0) {
1068                         idx--;
1069                         break;
1070                 }
1071         }
1072         mutex_unlock(&cfg80211_mutex);
1073
1074         cb->args[0] = idx;
1075
1076         return skb->len;
1077 }
1078
1079 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1080 {
1081         struct sk_buff *msg;
1082         struct cfg80211_registered_device *dev = info->user_ptr[0];
1083
1084         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1085         if (!msg)
1086                 return -ENOMEM;
1087
1088         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1089                 nlmsg_free(msg);
1090                 return -ENOBUFS;
1091         }
1092
1093         return genlmsg_reply(msg, info);
1094 }
1095
1096 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1097         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1098         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1099         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1100         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1101         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1102 };
1103
1104 static int parse_txq_params(struct nlattr *tb[],
1105                             struct ieee80211_txq_params *txq_params)
1106 {
1107         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1108             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1109             !tb[NL80211_TXQ_ATTR_AIFS])
1110                 return -EINVAL;
1111
1112         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1113         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1114         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1115         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1116         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1117
1118         if (txq_params->ac >= NL80211_NUM_ACS)
1119                 return -EINVAL;
1120
1121         return 0;
1122 }
1123
1124 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1125 {
1126         /*
1127          * You can only set the channel explicitly for AP, mesh
1128          * and WDS type interfaces; all others have their channel
1129          * managed via their respective "establish a connection"
1130          * command (connect, join, ...)
1131          *
1132          * Monitors are special as they are normally slaved to
1133          * whatever else is going on, so they behave as though
1134          * you tried setting the wiphy channel itself.
1135          */
1136         return !wdev ||
1137                 wdev->iftype == NL80211_IFTYPE_AP ||
1138                 wdev->iftype == NL80211_IFTYPE_WDS ||
1139                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1140                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1141                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1142 }
1143
1144 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1145                                  struct wireless_dev *wdev,
1146                                  struct genl_info *info)
1147 {
1148         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1149         u32 freq;
1150         int result;
1151
1152         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1153                 return -EINVAL;
1154
1155         if (!nl80211_can_set_dev_channel(wdev))
1156                 return -EOPNOTSUPP;
1157
1158         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1159                 channel_type = nla_get_u32(info->attrs[
1160                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1161                 if (channel_type != NL80211_CHAN_NO_HT &&
1162                     channel_type != NL80211_CHAN_HT20 &&
1163                     channel_type != NL80211_CHAN_HT40PLUS &&
1164                     channel_type != NL80211_CHAN_HT40MINUS)
1165                         return -EINVAL;
1166         }
1167
1168         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1169
1170         mutex_lock(&rdev->devlist_mtx);
1171         if (wdev) {
1172                 wdev_lock(wdev);
1173                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1174                 wdev_unlock(wdev);
1175         } else {
1176                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1177         }
1178         mutex_unlock(&rdev->devlist_mtx);
1179
1180         return result;
1181 }
1182
1183 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1184 {
1185         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1186         struct net_device *netdev = info->user_ptr[1];
1187
1188         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1189 }
1190
1191 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1192 {
1193         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1194         struct net_device *dev = info->user_ptr[1];
1195         struct wireless_dev *wdev = dev->ieee80211_ptr;
1196         const u8 *bssid;
1197
1198         if (!info->attrs[NL80211_ATTR_MAC])
1199                 return -EINVAL;
1200
1201         if (netif_running(dev))
1202                 return -EBUSY;
1203
1204         if (!rdev->ops->set_wds_peer)
1205                 return -EOPNOTSUPP;
1206
1207         if (wdev->iftype != NL80211_IFTYPE_WDS)
1208                 return -EOPNOTSUPP;
1209
1210         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1211         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1212 }
1213
1214
1215 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1216 {
1217         struct cfg80211_registered_device *rdev;
1218         struct net_device *netdev = NULL;
1219         struct wireless_dev *wdev;
1220         int result = 0, rem_txq_params = 0;
1221         struct nlattr *nl_txq_params;
1222         u32 changed;
1223         u8 retry_short = 0, retry_long = 0;
1224         u32 frag_threshold = 0, rts_threshold = 0;
1225         u8 coverage_class = 0;
1226
1227         /*
1228          * Try to find the wiphy and netdev. Normally this
1229          * function shouldn't need the netdev, but this is
1230          * done for backward compatibility -- previously
1231          * setting the channel was done per wiphy, but now
1232          * it is per netdev. Previous userland like hostapd
1233          * also passed a netdev to set_wiphy, so that it is
1234          * possible to let that go to the right netdev!
1235          */
1236         mutex_lock(&cfg80211_mutex);
1237
1238         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1239                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1240
1241                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1242                 if (netdev && netdev->ieee80211_ptr) {
1243                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1244                         mutex_lock(&rdev->mtx);
1245                 } else
1246                         netdev = NULL;
1247         }
1248
1249         if (!netdev) {
1250                 rdev = __cfg80211_rdev_from_info(info);
1251                 if (IS_ERR(rdev)) {
1252                         mutex_unlock(&cfg80211_mutex);
1253                         return PTR_ERR(rdev);
1254                 }
1255                 wdev = NULL;
1256                 netdev = NULL;
1257                 result = 0;
1258
1259                 mutex_lock(&rdev->mtx);
1260         } else if (netif_running(netdev) &&
1261                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1262                 wdev = netdev->ieee80211_ptr;
1263         else
1264                 wdev = NULL;
1265
1266         /*
1267          * end workaround code, by now the rdev is available
1268          * and locked, and wdev may or may not be NULL.
1269          */
1270
1271         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1272                 result = cfg80211_dev_rename(
1273                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1274
1275         mutex_unlock(&cfg80211_mutex);
1276
1277         if (result)
1278                 goto bad_res;
1279
1280         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1281                 struct ieee80211_txq_params txq_params;
1282                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1283
1284                 if (!rdev->ops->set_txq_params) {
1285                         result = -EOPNOTSUPP;
1286                         goto bad_res;
1287                 }
1288
1289                 if (!netdev) {
1290                         result = -EINVAL;
1291                         goto bad_res;
1292                 }
1293
1294                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1295                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1296                         result = -EINVAL;
1297                         goto bad_res;
1298                 }
1299
1300                 if (!netif_running(netdev)) {
1301                         result = -ENETDOWN;
1302                         goto bad_res;
1303                 }
1304
1305                 nla_for_each_nested(nl_txq_params,
1306                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1307                                     rem_txq_params) {
1308                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1309                                   nla_data(nl_txq_params),
1310                                   nla_len(nl_txq_params),
1311                                   txq_params_policy);
1312                         result = parse_txq_params(tb, &txq_params);
1313                         if (result)
1314                                 goto bad_res;
1315
1316                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1317                                                            netdev,
1318                                                            &txq_params);
1319                         if (result)
1320                                 goto bad_res;
1321                 }
1322         }
1323
1324         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1325                 result = __nl80211_set_channel(rdev, wdev, info);
1326                 if (result)
1327                         goto bad_res;
1328         }
1329
1330         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1331                 enum nl80211_tx_power_setting type;
1332                 int idx, mbm = 0;
1333
1334                 if (!rdev->ops->set_tx_power) {
1335                         result = -EOPNOTSUPP;
1336                         goto bad_res;
1337                 }
1338
1339                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1340                 type = nla_get_u32(info->attrs[idx]);
1341
1342                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1343                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1344                         result = -EINVAL;
1345                         goto bad_res;
1346                 }
1347
1348                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1349                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1350                         mbm = nla_get_u32(info->attrs[idx]);
1351                 }
1352
1353                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1354                 if (result)
1355                         goto bad_res;
1356         }
1357
1358         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1359             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1360                 u32 tx_ant, rx_ant;
1361                 if ((!rdev->wiphy.available_antennas_tx &&
1362                      !rdev->wiphy.available_antennas_rx) ||
1363                     !rdev->ops->set_antenna) {
1364                         result = -EOPNOTSUPP;
1365                         goto bad_res;
1366                 }
1367
1368                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1369                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1370
1371                 /* reject antenna configurations which don't match the
1372                  * available antenna masks, except for the "all" mask */
1373                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1374                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1375                         result = -EINVAL;
1376                         goto bad_res;
1377                 }
1378
1379                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1380                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1381
1382                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1383                 if (result)
1384                         goto bad_res;
1385         }
1386
1387         changed = 0;
1388
1389         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1390                 retry_short = nla_get_u8(
1391                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1392                 if (retry_short == 0) {
1393                         result = -EINVAL;
1394                         goto bad_res;
1395                 }
1396                 changed |= WIPHY_PARAM_RETRY_SHORT;
1397         }
1398
1399         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1400                 retry_long = nla_get_u8(
1401                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1402                 if (retry_long == 0) {
1403                         result = -EINVAL;
1404                         goto bad_res;
1405                 }
1406                 changed |= WIPHY_PARAM_RETRY_LONG;
1407         }
1408
1409         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1410                 frag_threshold = nla_get_u32(
1411                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1412                 if (frag_threshold < 256) {
1413                         result = -EINVAL;
1414                         goto bad_res;
1415                 }
1416                 if (frag_threshold != (u32) -1) {
1417                         /*
1418                          * Fragments (apart from the last one) are required to
1419                          * have even length. Make the fragmentation code
1420                          * simpler by stripping LSB should someone try to use
1421                          * odd threshold value.
1422                          */
1423                         frag_threshold &= ~0x1;
1424                 }
1425                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1426         }
1427
1428         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1429                 rts_threshold = nla_get_u32(
1430                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1431                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1432         }
1433
1434         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1435                 coverage_class = nla_get_u8(
1436                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1437                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1438         }
1439
1440         if (changed) {
1441                 u8 old_retry_short, old_retry_long;
1442                 u32 old_frag_threshold, old_rts_threshold;
1443                 u8 old_coverage_class;
1444
1445                 if (!rdev->ops->set_wiphy_params) {
1446                         result = -EOPNOTSUPP;
1447                         goto bad_res;
1448                 }
1449
1450                 old_retry_short = rdev->wiphy.retry_short;
1451                 old_retry_long = rdev->wiphy.retry_long;
1452                 old_frag_threshold = rdev->wiphy.frag_threshold;
1453                 old_rts_threshold = rdev->wiphy.rts_threshold;
1454                 old_coverage_class = rdev->wiphy.coverage_class;
1455
1456                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1457                         rdev->wiphy.retry_short = retry_short;
1458                 if (changed & WIPHY_PARAM_RETRY_LONG)
1459                         rdev->wiphy.retry_long = retry_long;
1460                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1461                         rdev->wiphy.frag_threshold = frag_threshold;
1462                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1463                         rdev->wiphy.rts_threshold = rts_threshold;
1464                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1465                         rdev->wiphy.coverage_class = coverage_class;
1466
1467                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1468                 if (result) {
1469                         rdev->wiphy.retry_short = old_retry_short;
1470                         rdev->wiphy.retry_long = old_retry_long;
1471                         rdev->wiphy.frag_threshold = old_frag_threshold;
1472                         rdev->wiphy.rts_threshold = old_rts_threshold;
1473                         rdev->wiphy.coverage_class = old_coverage_class;
1474                 }
1475         }
1476
1477  bad_res:
1478         mutex_unlock(&rdev->mtx);
1479         if (netdev)
1480                 dev_put(netdev);
1481         return result;
1482 }
1483
1484
1485 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1486                               struct cfg80211_registered_device *rdev,
1487                               struct net_device *dev)
1488 {
1489         void *hdr;
1490
1491         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1492         if (!hdr)
1493                 return -1;
1494
1495         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1496         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1497         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1498         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1499
1500         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1501                     rdev->devlist_generation ^
1502                         (cfg80211_rdev_list_generation << 2));
1503
1504         return genlmsg_end(msg, hdr);
1505
1506  nla_put_failure:
1507         genlmsg_cancel(msg, hdr);
1508         return -EMSGSIZE;
1509 }
1510
1511 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1512 {
1513         int wp_idx = 0;
1514         int if_idx = 0;
1515         int wp_start = cb->args[0];
1516         int if_start = cb->args[1];
1517         struct cfg80211_registered_device *rdev;
1518         struct wireless_dev *wdev;
1519
1520         mutex_lock(&cfg80211_mutex);
1521         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1522                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1523                         continue;
1524                 if (wp_idx < wp_start) {
1525                         wp_idx++;
1526                         continue;
1527                 }
1528                 if_idx = 0;
1529
1530                 mutex_lock(&rdev->devlist_mtx);
1531                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1532                         if (if_idx < if_start) {
1533                                 if_idx++;
1534                                 continue;
1535                         }
1536                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1537                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1538                                                rdev, wdev->netdev) < 0) {
1539                                 mutex_unlock(&rdev->devlist_mtx);
1540                                 goto out;
1541                         }
1542                         if_idx++;
1543                 }
1544                 mutex_unlock(&rdev->devlist_mtx);
1545
1546                 wp_idx++;
1547         }
1548  out:
1549         mutex_unlock(&cfg80211_mutex);
1550
1551         cb->args[0] = wp_idx;
1552         cb->args[1] = if_idx;
1553
1554         return skb->len;
1555 }
1556
1557 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1558 {
1559         struct sk_buff *msg;
1560         struct cfg80211_registered_device *dev = info->user_ptr[0];
1561         struct net_device *netdev = info->user_ptr[1];
1562
1563         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1564         if (!msg)
1565                 return -ENOMEM;
1566
1567         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1568                                dev, netdev) < 0) {
1569                 nlmsg_free(msg);
1570                 return -ENOBUFS;
1571         }
1572
1573         return genlmsg_reply(msg, info);
1574 }
1575
1576 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1577         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1578         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1579         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1580         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1581         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1582 };
1583
1584 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1585 {
1586         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1587         int flag;
1588
1589         *mntrflags = 0;
1590
1591         if (!nla)
1592                 return -EINVAL;
1593
1594         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1595                              nla, mntr_flags_policy))
1596                 return -EINVAL;
1597
1598         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1599                 if (flags[flag])
1600                         *mntrflags |= (1<<flag);
1601
1602         return 0;
1603 }
1604
1605 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1606                                struct net_device *netdev, u8 use_4addr,
1607                                enum nl80211_iftype iftype)
1608 {
1609         if (!use_4addr) {
1610                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1611                         return -EBUSY;
1612                 return 0;
1613         }
1614
1615         switch (iftype) {
1616         case NL80211_IFTYPE_AP_VLAN:
1617                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1618                         return 0;
1619                 break;
1620         case NL80211_IFTYPE_STATION:
1621                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1622                         return 0;
1623                 break;
1624         default:
1625                 break;
1626         }
1627
1628         return -EOPNOTSUPP;
1629 }
1630
1631 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1632 {
1633         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1634         struct vif_params params;
1635         int err;
1636         enum nl80211_iftype otype, ntype;
1637         struct net_device *dev = info->user_ptr[1];
1638         u32 _flags, *flags = NULL;
1639         bool change = false;
1640
1641         memset(&params, 0, sizeof(params));
1642
1643         otype = ntype = dev->ieee80211_ptr->iftype;
1644
1645         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1646                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1647                 if (otype != ntype)
1648                         change = true;
1649                 if (ntype > NL80211_IFTYPE_MAX)
1650                         return -EINVAL;
1651         }
1652
1653         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1654                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1655
1656                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1657                         return -EINVAL;
1658                 if (netif_running(dev))
1659                         return -EBUSY;
1660
1661                 wdev_lock(wdev);
1662                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1663                              IEEE80211_MAX_MESH_ID_LEN);
1664                 wdev->mesh_id_up_len =
1665                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1666                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1667                        wdev->mesh_id_up_len);
1668                 wdev_unlock(wdev);
1669         }
1670
1671         if (info->attrs[NL80211_ATTR_4ADDR]) {
1672                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1673                 change = true;
1674                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1675                 if (err)
1676                         return err;
1677         } else {
1678                 params.use_4addr = -1;
1679         }
1680
1681         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1682                 if (ntype != NL80211_IFTYPE_MONITOR)
1683                         return -EINVAL;
1684                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1685                                           &_flags);
1686                 if (err)
1687                         return err;
1688
1689                 flags = &_flags;
1690                 change = true;
1691         }
1692
1693         if (change)
1694                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1695         else
1696                 err = 0;
1697
1698         if (!err && params.use_4addr != -1)
1699                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1700
1701         return err;
1702 }
1703
1704 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1705 {
1706         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1707         struct vif_params params;
1708         struct net_device *dev;
1709         int err;
1710         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1711         u32 flags;
1712
1713         memset(&params, 0, sizeof(params));
1714
1715         if (!info->attrs[NL80211_ATTR_IFNAME])
1716                 return -EINVAL;
1717
1718         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1719                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1720                 if (type > NL80211_IFTYPE_MAX)
1721                         return -EINVAL;
1722         }
1723
1724         if (!rdev->ops->add_virtual_intf ||
1725             !(rdev->wiphy.interface_modes & (1 << type)))
1726                 return -EOPNOTSUPP;
1727
1728         if (info->attrs[NL80211_ATTR_4ADDR]) {
1729                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1730                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1731                 if (err)
1732                         return err;
1733         }
1734
1735         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1736                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1737                                   &flags);
1738         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1739                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1740                 type, err ? NULL : &flags, &params);
1741         if (IS_ERR(dev))
1742                 return PTR_ERR(dev);
1743
1744         if (type == NL80211_IFTYPE_MESH_POINT &&
1745             info->attrs[NL80211_ATTR_MESH_ID]) {
1746                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1747
1748                 wdev_lock(wdev);
1749                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1750                              IEEE80211_MAX_MESH_ID_LEN);
1751                 wdev->mesh_id_up_len =
1752                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1753                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1754                        wdev->mesh_id_up_len);
1755                 wdev_unlock(wdev);
1756         }
1757
1758         return 0;
1759 }
1760
1761 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1762 {
1763         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1764         struct net_device *dev = info->user_ptr[1];
1765
1766         if (!rdev->ops->del_virtual_intf)
1767                 return -EOPNOTSUPP;
1768
1769         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1770 }
1771
1772 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1773 {
1774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1775         struct net_device *dev = info->user_ptr[1];
1776         u16 noack_map;
1777
1778         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1779                 return -EINVAL;
1780
1781         if (!rdev->ops->set_noack_map)
1782                 return -EOPNOTSUPP;
1783
1784         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1785
1786         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1787 }
1788
1789 struct get_key_cookie {
1790         struct sk_buff *msg;
1791         int error;
1792         int idx;
1793 };
1794
1795 static void get_key_callback(void *c, struct key_params *params)
1796 {
1797         struct nlattr *key;
1798         struct get_key_cookie *cookie = c;
1799
1800         if (params->key)
1801                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1802                         params->key_len, params->key);
1803
1804         if (params->seq)
1805                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1806                         params->seq_len, params->seq);
1807
1808         if (params->cipher)
1809                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1810                             params->cipher);
1811
1812         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1813         if (!key)
1814                 goto nla_put_failure;
1815
1816         if (params->key)
1817                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1818                         params->key_len, params->key);
1819
1820         if (params->seq)
1821                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1822                         params->seq_len, params->seq);
1823
1824         if (params->cipher)
1825                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1826                             params->cipher);
1827
1828         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1829
1830         nla_nest_end(cookie->msg, key);
1831
1832         return;
1833  nla_put_failure:
1834         cookie->error = 1;
1835 }
1836
1837 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1838 {
1839         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1840         int err;
1841         struct net_device *dev = info->user_ptr[1];
1842         u8 key_idx = 0;
1843         const u8 *mac_addr = NULL;
1844         bool pairwise;
1845         struct get_key_cookie cookie = {
1846                 .error = 0,
1847         };
1848         void *hdr;
1849         struct sk_buff *msg;
1850
1851         if (info->attrs[NL80211_ATTR_KEY_IDX])
1852                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1853
1854         if (key_idx > 5)
1855                 return -EINVAL;
1856
1857         if (info->attrs[NL80211_ATTR_MAC])
1858                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1859
1860         pairwise = !!mac_addr;
1861         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1862                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1863                 if (kt >= NUM_NL80211_KEYTYPES)
1864                         return -EINVAL;
1865                 if (kt != NL80211_KEYTYPE_GROUP &&
1866                     kt != NL80211_KEYTYPE_PAIRWISE)
1867                         return -EINVAL;
1868                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1869         }
1870
1871         if (!rdev->ops->get_key)
1872                 return -EOPNOTSUPP;
1873
1874         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1875         if (!msg)
1876                 return -ENOMEM;
1877
1878         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1879                              NL80211_CMD_NEW_KEY);
1880         if (IS_ERR(hdr))
1881                 return PTR_ERR(hdr);
1882
1883         cookie.msg = msg;
1884         cookie.idx = key_idx;
1885
1886         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1887         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1888         if (mac_addr)
1889                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1890
1891         if (pairwise && mac_addr &&
1892             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1893                 return -ENOENT;
1894
1895         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1896                                  mac_addr, &cookie, get_key_callback);
1897
1898         if (err)
1899                 goto free_msg;
1900
1901         if (cookie.error)
1902                 goto nla_put_failure;
1903
1904         genlmsg_end(msg, hdr);
1905         return genlmsg_reply(msg, info);
1906
1907  nla_put_failure:
1908         err = -ENOBUFS;
1909  free_msg:
1910         nlmsg_free(msg);
1911         return err;
1912 }
1913
1914 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1915 {
1916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1917         struct key_parse key;
1918         int err;
1919         struct net_device *dev = info->user_ptr[1];
1920
1921         err = nl80211_parse_key(info, &key);
1922         if (err)
1923                 return err;
1924
1925         if (key.idx < 0)
1926                 return -EINVAL;
1927
1928         /* only support setting default key */
1929         if (!key.def && !key.defmgmt)
1930                 return -EINVAL;
1931
1932         wdev_lock(dev->ieee80211_ptr);
1933
1934         if (key.def) {
1935                 if (!rdev->ops->set_default_key) {
1936                         err = -EOPNOTSUPP;
1937                         goto out;
1938                 }
1939
1940                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1941                 if (err)
1942                         goto out;
1943
1944                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1945                                                  key.def_uni, key.def_multi);
1946
1947                 if (err)
1948                         goto out;
1949
1950 #ifdef CONFIG_CFG80211_WEXT
1951                 dev->ieee80211_ptr->wext.default_key = key.idx;
1952 #endif
1953         } else {
1954                 if (key.def_uni || !key.def_multi) {
1955                         err = -EINVAL;
1956                         goto out;
1957                 }
1958
1959                 if (!rdev->ops->set_default_mgmt_key) {
1960                         err = -EOPNOTSUPP;
1961                         goto out;
1962                 }
1963
1964                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1965                 if (err)
1966                         goto out;
1967
1968                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1969                                                       dev, key.idx);
1970                 if (err)
1971                         goto out;
1972
1973 #ifdef CONFIG_CFG80211_WEXT
1974                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1975 #endif
1976         }
1977
1978  out:
1979         wdev_unlock(dev->ieee80211_ptr);
1980
1981         return err;
1982 }
1983
1984 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1985 {
1986         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1987         int err;
1988         struct net_device *dev = info->user_ptr[1];
1989         struct key_parse key;
1990         const u8 *mac_addr = NULL;
1991
1992         err = nl80211_parse_key(info, &key);
1993         if (err)
1994                 return err;
1995
1996         if (!key.p.key)
1997                 return -EINVAL;
1998
1999         if (info->attrs[NL80211_ATTR_MAC])
2000                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2001
2002         if (key.type == -1) {
2003                 if (mac_addr)
2004                         key.type = NL80211_KEYTYPE_PAIRWISE;
2005                 else
2006                         key.type = NL80211_KEYTYPE_GROUP;
2007         }
2008
2009         /* for now */
2010         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2011             key.type != NL80211_KEYTYPE_GROUP)
2012                 return -EINVAL;
2013
2014         if (!rdev->ops->add_key)
2015                 return -EOPNOTSUPP;
2016
2017         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2018                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2019                                            mac_addr))
2020                 return -EINVAL;
2021
2022         wdev_lock(dev->ieee80211_ptr);
2023         err = nl80211_key_allowed(dev->ieee80211_ptr);
2024         if (!err)
2025                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2026                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2027                                          mac_addr, &key.p);
2028         wdev_unlock(dev->ieee80211_ptr);
2029
2030         return err;
2031 }
2032
2033 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2034 {
2035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2036         int err;
2037         struct net_device *dev = info->user_ptr[1];
2038         u8 *mac_addr = NULL;
2039         struct key_parse key;
2040
2041         err = nl80211_parse_key(info, &key);
2042         if (err)
2043                 return err;
2044
2045         if (info->attrs[NL80211_ATTR_MAC])
2046                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2047
2048         if (key.type == -1) {
2049                 if (mac_addr)
2050                         key.type = NL80211_KEYTYPE_PAIRWISE;
2051                 else
2052                         key.type = NL80211_KEYTYPE_GROUP;
2053         }
2054
2055         /* for now */
2056         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2057             key.type != NL80211_KEYTYPE_GROUP)
2058                 return -EINVAL;
2059
2060         if (!rdev->ops->del_key)
2061                 return -EOPNOTSUPP;
2062
2063         wdev_lock(dev->ieee80211_ptr);
2064         err = nl80211_key_allowed(dev->ieee80211_ptr);
2065
2066         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2067             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2068                 err = -ENOENT;
2069
2070         if (!err)
2071                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2072                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2073                                          mac_addr);
2074
2075 #ifdef CONFIG_CFG80211_WEXT
2076         if (!err) {
2077                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2078                         dev->ieee80211_ptr->wext.default_key = -1;
2079                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2080                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2081         }
2082 #endif
2083         wdev_unlock(dev->ieee80211_ptr);
2084
2085         return err;
2086 }
2087
2088 static int nl80211_parse_beacon(struct genl_info *info,
2089                                 struct cfg80211_beacon_data *bcn)
2090 {
2091         bool haveinfo = false;
2092
2093         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2094             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2095             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2096             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2097                 return -EINVAL;
2098
2099         memset(bcn, 0, sizeof(*bcn));
2100
2101         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2102                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2103                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2104                 if (!bcn->head_len)
2105                         return -EINVAL;
2106                 haveinfo = true;
2107         }
2108
2109         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2110                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2111                 bcn->tail_len =
2112                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2113                 haveinfo = true;
2114         }
2115
2116         if (!haveinfo)
2117                 return -EINVAL;
2118
2119         if (info->attrs[NL80211_ATTR_IE]) {
2120                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2121                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2122         }
2123
2124         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2125                 bcn->proberesp_ies =
2126                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2127                 bcn->proberesp_ies_len =
2128                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2129         }
2130
2131         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2132                 bcn->assocresp_ies =
2133                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2134                 bcn->assocresp_ies_len =
2135                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2136         }
2137
2138         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2139                 bcn->probe_resp =
2140                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2141                 bcn->probe_resp_len =
2142                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2143         }
2144
2145         return 0;
2146 }
2147
2148 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2149 {
2150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2151         struct net_device *dev = info->user_ptr[1];
2152         struct wireless_dev *wdev = dev->ieee80211_ptr;
2153         struct cfg80211_ap_settings params;
2154         int err;
2155
2156         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2157             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2158                 return -EOPNOTSUPP;
2159
2160         if (!rdev->ops->start_ap)
2161                 return -EOPNOTSUPP;
2162
2163         if (wdev->beacon_interval)
2164                 return -EALREADY;
2165
2166         memset(&params, 0, sizeof(params));
2167
2168         /* these are required for START_AP */
2169         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2170             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2171             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2172                 return -EINVAL;
2173
2174         err = nl80211_parse_beacon(info, &params.beacon);
2175         if (err)
2176                 return err;
2177
2178         params.beacon_interval =
2179                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2180         params.dtim_period =
2181                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2182
2183         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2184         if (err)
2185                 return err;
2186
2187         /*
2188          * In theory, some of these attributes should be required here
2189          * but since they were not used when the command was originally
2190          * added, keep them optional for old user space programs to let
2191          * them continue to work with drivers that do not need the
2192          * additional information -- drivers must check!
2193          */
2194         if (info->attrs[NL80211_ATTR_SSID]) {
2195                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2196                 params.ssid_len =
2197                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2198                 if (params.ssid_len == 0 ||
2199                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2200                         return -EINVAL;
2201         }
2202
2203         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2204                 params.hidden_ssid = nla_get_u32(
2205                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2206                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2207                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2208                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2209                         return -EINVAL;
2210         }
2211
2212         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2213
2214         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2215                 params.auth_type = nla_get_u32(
2216                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2217                 if (!nl80211_valid_auth_type(params.auth_type))
2218                         return -EINVAL;
2219         } else
2220                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2221
2222         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2223                                       NL80211_MAX_NR_CIPHER_SUITES);
2224         if (err)
2225                 return err;
2226
2227         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2228                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2229                         return -EOPNOTSUPP;
2230                 params.inactivity_timeout = nla_get_u16(
2231                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2232         }
2233
2234         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2235         if (!err)
2236                 wdev->beacon_interval = params.beacon_interval;
2237         return err;
2238 }
2239
2240 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2241 {
2242         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2243         struct net_device *dev = info->user_ptr[1];
2244         struct wireless_dev *wdev = dev->ieee80211_ptr;
2245         struct cfg80211_beacon_data params;
2246         int err;
2247
2248         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2249             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2250                 return -EOPNOTSUPP;
2251
2252         if (!rdev->ops->change_beacon)
2253                 return -EOPNOTSUPP;
2254
2255         if (!wdev->beacon_interval)
2256                 return -EINVAL;
2257
2258         err = nl80211_parse_beacon(info, &params);
2259         if (err)
2260                 return err;
2261
2262         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2263 }
2264
2265 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2266 {
2267         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2268         struct net_device *dev = info->user_ptr[1];
2269         struct wireless_dev *wdev = dev->ieee80211_ptr;
2270         int err;
2271
2272         if (!rdev->ops->stop_ap)
2273                 return -EOPNOTSUPP;
2274
2275         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2276             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2277                 return -EOPNOTSUPP;
2278
2279         if (!wdev->beacon_interval)
2280                 return -ENOENT;
2281
2282         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2283         if (!err)
2284                 wdev->beacon_interval = 0;
2285         return err;
2286 }
2287
2288 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2289         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2290         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2291         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2292         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2293         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2294         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2295 };
2296
2297 static int parse_station_flags(struct genl_info *info,
2298                                enum nl80211_iftype iftype,
2299                                struct station_parameters *params)
2300 {
2301         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2302         struct nlattr *nla;
2303         int flag;
2304
2305         /*
2306          * Try parsing the new attribute first so userspace
2307          * can specify both for older kernels.
2308          */
2309         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2310         if (nla) {
2311                 struct nl80211_sta_flag_update *sta_flags;
2312
2313                 sta_flags = nla_data(nla);
2314                 params->sta_flags_mask = sta_flags->mask;
2315                 params->sta_flags_set = sta_flags->set;
2316                 if ((params->sta_flags_mask |
2317                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2318                         return -EINVAL;
2319                 return 0;
2320         }
2321
2322         /* if present, parse the old attribute */
2323
2324         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2325         if (!nla)
2326                 return 0;
2327
2328         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2329                              nla, sta_flags_policy))
2330                 return -EINVAL;
2331
2332         /*
2333          * Only allow certain flags for interface types so that
2334          * other attributes are silently ignored. Remember that
2335          * this is backward compatibility code with old userspace
2336          * and shouldn't be hit in other cases anyway.
2337          */
2338         switch (iftype) {
2339         case NL80211_IFTYPE_AP:
2340         case NL80211_IFTYPE_AP_VLAN:
2341         case NL80211_IFTYPE_P2P_GO:
2342                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2343                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2344                                          BIT(NL80211_STA_FLAG_WME) |
2345                                          BIT(NL80211_STA_FLAG_MFP);
2346                 break;
2347         case NL80211_IFTYPE_P2P_CLIENT:
2348         case NL80211_IFTYPE_STATION:
2349                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2350                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2351                 break;
2352         case NL80211_IFTYPE_MESH_POINT:
2353                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2354                                          BIT(NL80211_STA_FLAG_MFP) |
2355                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2356         default:
2357                 return -EINVAL;
2358         }
2359
2360         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2361                 if (flags[flag])
2362                         params->sta_flags_set |= (1<<flag);
2363
2364         return 0;
2365 }
2366
2367 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2368                                  int attr)
2369 {
2370         struct nlattr *rate;
2371         u16 bitrate;
2372
2373         rate = nla_nest_start(msg, attr);
2374         if (!rate)
2375                 goto nla_put_failure;
2376
2377         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2378         bitrate = cfg80211_calculate_bitrate(info);
2379         if (bitrate > 0)
2380                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2381
2382         if (info->flags & RATE_INFO_FLAGS_MCS)
2383                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2384         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2385                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2386         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2387                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2388
2389         nla_nest_end(msg, rate);
2390         return true;
2391
2392 nla_put_failure:
2393         return false;
2394 }
2395
2396 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2397                                 int flags,
2398                                 struct cfg80211_registered_device *rdev,
2399                                 struct net_device *dev,
2400                                 const u8 *mac_addr, struct station_info *sinfo)
2401 {
2402         void *hdr;
2403         struct nlattr *sinfoattr, *bss_param;
2404
2405         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2406         if (!hdr)
2407                 return -1;
2408
2409         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2410         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2411
2412         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2413
2414         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2415         if (!sinfoattr)
2416                 goto nla_put_failure;
2417         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2418                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2419                             sinfo->connected_time);
2420         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2421                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2422                             sinfo->inactive_time);
2423         if (sinfo->filled & STATION_INFO_RX_BYTES)
2424                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2425                             sinfo->rx_bytes);
2426         if (sinfo->filled & STATION_INFO_TX_BYTES)
2427                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2428                             sinfo->tx_bytes);
2429         if (sinfo->filled & STATION_INFO_LLID)
2430                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2431                             sinfo->llid);
2432         if (sinfo->filled & STATION_INFO_PLID)
2433                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2434                             sinfo->plid);
2435         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2436                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2437                             sinfo->plink_state);
2438         switch (rdev->wiphy.signal_type) {
2439         case CFG80211_SIGNAL_TYPE_MBM:
2440                 if (sinfo->filled & STATION_INFO_SIGNAL)
2441                         NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2442                                    sinfo->signal);
2443                 if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2444                         NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2445                                    sinfo->signal_avg);
2446                 break;
2447         default:
2448                 break;
2449         }
2450         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2451                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2452                                           NL80211_STA_INFO_TX_BITRATE))
2453                         goto nla_put_failure;
2454         }
2455         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2456                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2457                                           NL80211_STA_INFO_RX_BITRATE))
2458                         goto nla_put_failure;
2459         }
2460         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2461                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2462                             sinfo->rx_packets);
2463         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2464                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2465                             sinfo->tx_packets);
2466         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2467                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2468                             sinfo->tx_retries);
2469         if (sinfo->filled & STATION_INFO_TX_FAILED)
2470                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2471                             sinfo->tx_failed);
2472         if (sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT)
2473                 NLA_PUT_U32(msg, NL80211_STA_INFO_BEACON_LOSS,
2474                             sinfo->beacon_loss_count);
2475         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2476                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2477                 if (!bss_param)
2478                         goto nla_put_failure;
2479
2480                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2481                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2482                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2483                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2484                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2485                         NLA_PUT_FLAG(msg,
2486                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2487                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2488                            sinfo->bss_param.dtim_period);
2489                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2490                             sinfo->bss_param.beacon_interval);
2491
2492                 nla_nest_end(msg, bss_param);
2493         }
2494         if (sinfo->filled & STATION_INFO_STA_FLAGS)
2495                 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2496                         sizeof(struct nl80211_sta_flag_update),
2497                         &sinfo->sta_flags);
2498         if (sinfo->filled & STATION_INFO_T_OFFSET)
2499                 NLA_PUT_U64(msg, NL80211_STA_INFO_T_OFFSET,
2500                             sinfo->t_offset);
2501         nla_nest_end(msg, sinfoattr);
2502
2503         if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2504                 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2505                         sinfo->assoc_req_ies);
2506
2507         return genlmsg_end(msg, hdr);
2508
2509  nla_put_failure:
2510         genlmsg_cancel(msg, hdr);
2511         return -EMSGSIZE;
2512 }
2513
2514 static int nl80211_dump_station(struct sk_buff *skb,
2515                                 struct netlink_callback *cb)
2516 {
2517         struct station_info sinfo;
2518         struct cfg80211_registered_device *dev;
2519         struct net_device *netdev;
2520         u8 mac_addr[ETH_ALEN];
2521         int sta_idx = cb->args[1];
2522         int err;
2523
2524         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2525         if (err)
2526                 return err;
2527
2528         if (!dev->ops->dump_station) {
2529                 err = -EOPNOTSUPP;
2530                 goto out_err;
2531         }
2532
2533         while (1) {
2534                 memset(&sinfo, 0, sizeof(sinfo));
2535                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2536                                              mac_addr, &sinfo);
2537                 if (err == -ENOENT)
2538                         break;
2539                 if (err)
2540                         goto out_err;
2541
2542                 if (nl80211_send_station(skb,
2543                                 NETLINK_CB(cb->skb).pid,
2544                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2545                                 dev, netdev, mac_addr,
2546                                 &sinfo) < 0)
2547                         goto out;
2548
2549                 sta_idx++;
2550         }
2551
2552
2553  out:
2554         cb->args[1] = sta_idx;
2555         err = skb->len;
2556  out_err:
2557         nl80211_finish_netdev_dump(dev);
2558
2559         return err;
2560 }
2561
2562 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2563 {
2564         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2565         struct net_device *dev = info->user_ptr[1];
2566         struct station_info sinfo;
2567         struct sk_buff *msg;
2568         u8 *mac_addr = NULL;
2569         int err;
2570
2571         memset(&sinfo, 0, sizeof(sinfo));
2572
2573         if (!info->attrs[NL80211_ATTR_MAC])
2574                 return -EINVAL;
2575
2576         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2577
2578         if (!rdev->ops->get_station)
2579                 return -EOPNOTSUPP;
2580
2581         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2582         if (err)
2583                 return err;
2584
2585         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2586         if (!msg)
2587                 return -ENOMEM;
2588
2589         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2590                                  rdev, dev, mac_addr, &sinfo) < 0) {
2591                 nlmsg_free(msg);
2592                 return -ENOBUFS;
2593         }
2594
2595         return genlmsg_reply(msg, info);
2596 }
2597
2598 /*
2599  * Get vlan interface making sure it is running and on the right wiphy.
2600  */
2601 static struct net_device *get_vlan(struct genl_info *info,
2602                                    struct cfg80211_registered_device *rdev)
2603 {
2604         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2605         struct net_device *v;
2606         int ret;
2607
2608         if (!vlanattr)
2609                 return NULL;
2610
2611         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2612         if (!v)
2613                 return ERR_PTR(-ENODEV);
2614
2615         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2616                 ret = -EINVAL;
2617                 goto error;
2618         }
2619
2620         if (!netif_running(v)) {
2621                 ret = -ENETDOWN;
2622                 goto error;
2623         }
2624
2625         return v;
2626  error:
2627         dev_put(v);
2628         return ERR_PTR(ret);
2629 }
2630
2631 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2632 {
2633         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2634         int err;
2635         struct net_device *dev = info->user_ptr[1];
2636         struct station_parameters params;
2637         u8 *mac_addr = NULL;
2638
2639         memset(&params, 0, sizeof(params));
2640
2641         params.listen_interval = -1;
2642         params.plink_state = -1;
2643
2644         if (info->attrs[NL80211_ATTR_STA_AID])
2645                 return -EINVAL;
2646
2647         if (!info->attrs[NL80211_ATTR_MAC])
2648                 return -EINVAL;
2649
2650         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2651
2652         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2653                 params.supported_rates =
2654                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2655                 params.supported_rates_len =
2656                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2657         }
2658
2659         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2660                 params.listen_interval =
2661                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2662
2663         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2664                 params.ht_capa =
2665                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2666
2667         if (!rdev->ops->change_station)
2668                 return -EOPNOTSUPP;
2669
2670         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2671                 return -EINVAL;
2672
2673         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2674                 params.plink_action =
2675                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2676
2677         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2678                 params.plink_state =
2679                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2680
2681         switch (dev->ieee80211_ptr->iftype) {
2682         case NL80211_IFTYPE_AP:
2683         case NL80211_IFTYPE_AP_VLAN:
2684         case NL80211_IFTYPE_P2P_GO:
2685                 /* disallow mesh-specific things */
2686                 if (params.plink_action)
2687                         return -EINVAL;
2688
2689                 /* TDLS can't be set, ... */
2690                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2691                         return -EINVAL;
2692                 /*
2693                  * ... but don't bother the driver with it. This works around
2694                  * a hostapd/wpa_supplicant issue -- it always includes the
2695                  * TLDS_PEER flag in the mask even for AP mode.
2696                  */
2697                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2698
2699                 /* accept only the listed bits */
2700                 if (params.sta_flags_mask &
2701                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2702                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2703                                   BIT(NL80211_STA_FLAG_WME) |
2704                                   BIT(NL80211_STA_FLAG_MFP)))
2705                         return -EINVAL;
2706
2707                 /* must be last in here for error handling */
2708                 params.vlan = get_vlan(info, rdev);
2709                 if (IS_ERR(params.vlan))
2710                         return PTR_ERR(params.vlan);
2711                 break;
2712         case NL80211_IFTYPE_P2P_CLIENT:
2713         case NL80211_IFTYPE_STATION:
2714                 /*
2715                  * Don't allow userspace to change the TDLS_PEER flag,
2716                  * but silently ignore attempts to change it since we
2717                  * don't have state here to verify that it doesn't try
2718                  * to change the flag.
2719                  */
2720                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2721                 /* fall through */
2722         case NL80211_IFTYPE_ADHOC:
2723                 /* disallow things sta doesn't support */
2724                 if (params.plink_action)
2725                         return -EINVAL;
2726                 if (params.ht_capa)
2727                         return -EINVAL;
2728                 if (params.listen_interval >= 0)
2729                         return -EINVAL;
2730                 /* reject any changes other than AUTHORIZED */
2731                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2732                         return -EINVAL;
2733                 break;
2734         case NL80211_IFTYPE_MESH_POINT:
2735                 /* disallow things mesh doesn't support */
2736                 if (params.vlan)
2737                         return -EINVAL;
2738                 if (params.ht_capa)
2739                         return -EINVAL;
2740                 if (params.listen_interval >= 0)
2741                         return -EINVAL;
2742                 /*
2743                  * No special handling for TDLS here -- the userspace
2744                  * mesh code doesn't have this bug.
2745                  */
2746                 if (params.sta_flags_mask &
2747                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2748                                   BIT(NL80211_STA_FLAG_MFP) |
2749                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2750                         return -EINVAL;
2751                 break;
2752         default:
2753                 return -EOPNOTSUPP;
2754         }
2755
2756         /* be aware of params.vlan when changing code here */
2757
2758         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2759
2760         if (params.vlan)
2761                 dev_put(params.vlan);
2762
2763         return err;
2764 }
2765
2766 static struct nla_policy
2767 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2768         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2769         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2770 };
2771
2772 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2773 {
2774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2775         int err;
2776         struct net_device *dev = info->user_ptr[1];
2777         struct station_parameters params;
2778         u8 *mac_addr = NULL;
2779
2780         memset(&params, 0, sizeof(params));
2781
2782         if (!info->attrs[NL80211_ATTR_MAC])
2783                 return -EINVAL;
2784
2785         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2786                 return -EINVAL;
2787
2788         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2789                 return -EINVAL;
2790
2791         if (!info->attrs[NL80211_ATTR_STA_AID])
2792                 return -EINVAL;
2793
2794         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2795         params.supported_rates =
2796                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2797         params.supported_rates_len =
2798                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2799         params.listen_interval =
2800                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2801
2802         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2803         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2804                 return -EINVAL;
2805
2806         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2807                 params.ht_capa =
2808                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2809
2810         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2811                 params.plink_action =
2812                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2813
2814         if (!rdev->ops->add_station)
2815                 return -EOPNOTSUPP;
2816
2817         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2818                 return -EINVAL;
2819
2820         switch (dev->ieee80211_ptr->iftype) {
2821         case NL80211_IFTYPE_AP:
2822         case NL80211_IFTYPE_AP_VLAN:
2823         case NL80211_IFTYPE_P2P_GO:
2824                 /* parse WME attributes if sta is WME capable */
2825                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2826                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2827                     info->attrs[NL80211_ATTR_STA_WME]) {
2828                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2829                         struct nlattr *nla;
2830
2831                         nla = info->attrs[NL80211_ATTR_STA_WME];
2832                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2833                                                nl80211_sta_wme_policy);
2834                         if (err)
2835                                 return err;
2836
2837                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2838                                 params.uapsd_queues =
2839                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2840                         if (params.uapsd_queues &
2841                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2842                                 return -EINVAL;
2843
2844                         if (tb[NL80211_STA_WME_MAX_SP])
2845                                 params.max_sp =
2846                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2847
2848                         if (params.max_sp &
2849                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2850                                 return -EINVAL;
2851
2852                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2853                 }
2854                 /* TDLS peers cannot be added */
2855                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2856                         return -EINVAL;
2857                 /* but don't bother the driver with it */
2858                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2859
2860                 /* must be last in here for error handling */
2861                 params.vlan = get_vlan(info, rdev);
2862                 if (IS_ERR(params.vlan))
2863                         return PTR_ERR(params.vlan);
2864                 break;
2865         case NL80211_IFTYPE_MESH_POINT:
2866                 /* TDLS peers cannot be added */
2867                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2868                         return -EINVAL;
2869                 break;
2870         case NL80211_IFTYPE_STATION:
2871                 /* Only TDLS peers can be added */
2872                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2873                         return -EINVAL;
2874                 /* Can only add if TDLS ... */
2875                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2876                         return -EOPNOTSUPP;
2877                 /* ... with external setup is supported */
2878                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2879                         return -EOPNOTSUPP;
2880                 break;
2881         default:
2882                 return -EOPNOTSUPP;
2883         }
2884
2885         /* be aware of params.vlan when changing code here */
2886
2887         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2888
2889         if (params.vlan)
2890                 dev_put(params.vlan);
2891         return err;
2892 }
2893
2894 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2895 {
2896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2897         struct net_device *dev = info->user_ptr[1];
2898         u8 *mac_addr = NULL;
2899
2900         if (info->attrs[NL80211_ATTR_MAC])
2901                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2902
2903         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2904             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2905             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2906             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2907                 return -EINVAL;
2908
2909         if (!rdev->ops->del_station)
2910                 return -EOPNOTSUPP;
2911
2912         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2913 }
2914
2915 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2916                                 int flags, struct net_device *dev,
2917                                 u8 *dst, u8 *next_hop,
2918                                 struct mpath_info *pinfo)
2919 {
2920         void *hdr;
2921         struct nlattr *pinfoattr;
2922
2923         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2924         if (!hdr)
2925                 return -1;
2926
2927         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2928         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2929         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2930
2931         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2932
2933         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2934         if (!pinfoattr)
2935                 goto nla_put_failure;
2936         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2937                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2938                             pinfo->frame_qlen);
2939         if (pinfo->filled & MPATH_INFO_SN)
2940                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2941                             pinfo->sn);
2942         if (pinfo->filled & MPATH_INFO_METRIC)
2943                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2944                             pinfo->metric);
2945         if (pinfo->filled & MPATH_INFO_EXPTIME)
2946                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2947                             pinfo->exptime);
2948         if (pinfo->filled & MPATH_INFO_FLAGS)
2949                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2950                             pinfo->flags);
2951         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2952                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2953                             pinfo->discovery_timeout);
2954         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2955                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2956                             pinfo->discovery_retries);
2957
2958         nla_nest_end(msg, pinfoattr);
2959
2960         return genlmsg_end(msg, hdr);
2961
2962  nla_put_failure:
2963         genlmsg_cancel(msg, hdr);
2964         return -EMSGSIZE;
2965 }
2966
2967 static int nl80211_dump_mpath(struct sk_buff *skb,
2968                               struct netlink_callback *cb)
2969 {
2970         struct mpath_info pinfo;
2971         struct cfg80211_registered_device *dev;
2972         struct net_device *netdev;
2973         u8 dst[ETH_ALEN];
2974         u8 next_hop[ETH_ALEN];
2975         int path_idx = cb->args[1];
2976         int err;
2977
2978         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2979         if (err)
2980                 return err;
2981
2982         if (!dev->ops->dump_mpath) {
2983                 err = -EOPNOTSUPP;
2984                 goto out_err;
2985         }
2986
2987         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2988                 err = -EOPNOTSUPP;
2989                 goto out_err;
2990         }
2991
2992         while (1) {
2993                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2994                                            dst, next_hop, &pinfo);
2995                 if (err == -ENOENT)
2996                         break;
2997                 if (err)
2998                         goto out_err;
2999
3000                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3001                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3002                                        netdev, dst, next_hop,
3003                                        &pinfo) < 0)
3004                         goto out;
3005
3006                 path_idx++;
3007         }
3008
3009
3010  out:
3011         cb->args[1] = path_idx;
3012         err = skb->len;
3013  out_err:
3014         nl80211_finish_netdev_dump(dev);
3015         return err;
3016 }
3017
3018 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3019 {
3020         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3021         int err;
3022         struct net_device *dev = info->user_ptr[1];
3023         struct mpath_info pinfo;
3024         struct sk_buff *msg;
3025         u8 *dst = NULL;
3026         u8 next_hop[ETH_ALEN];
3027
3028         memset(&pinfo, 0, sizeof(pinfo));
3029
3030         if (!info->attrs[NL80211_ATTR_MAC])
3031                 return -EINVAL;
3032
3033         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3034
3035         if (!rdev->ops->get_mpath)
3036                 return -EOPNOTSUPP;
3037
3038         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3039                 return -EOPNOTSUPP;
3040
3041         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3042         if (err)
3043                 return err;
3044
3045         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3046         if (!msg)
3047                 return -ENOMEM;
3048
3049         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3050                                  dev, dst, next_hop, &pinfo) < 0) {
3051                 nlmsg_free(msg);
3052                 return -ENOBUFS;
3053         }
3054
3055         return genlmsg_reply(msg, info);
3056 }
3057
3058 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3059 {
3060         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3061         struct net_device *dev = info->user_ptr[1];
3062         u8 *dst = NULL;
3063         u8 *next_hop = NULL;
3064
3065         if (!info->attrs[NL80211_ATTR_MAC])
3066                 return -EINVAL;
3067
3068         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3069                 return -EINVAL;
3070
3071         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3072         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3073
3074         if (!rdev->ops->change_mpath)
3075                 return -EOPNOTSUPP;
3076
3077         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3078                 return -EOPNOTSUPP;
3079
3080         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3081 }
3082
3083 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3084 {
3085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3086         struct net_device *dev = info->user_ptr[1];
3087         u8 *dst = NULL;
3088         u8 *next_hop = NULL;
3089
3090         if (!info->attrs[NL80211_ATTR_MAC])
3091                 return -EINVAL;
3092
3093         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3094                 return -EINVAL;
3095
3096         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3097         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3098
3099         if (!rdev->ops->add_mpath)
3100                 return -EOPNOTSUPP;
3101
3102         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3103                 return -EOPNOTSUPP;
3104
3105         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3106 }
3107
3108 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3109 {
3110         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3111         struct net_device *dev = info->user_ptr[1];
3112         u8 *dst = NULL;
3113
3114         if (info->attrs[NL80211_ATTR_MAC])
3115                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3116
3117         if (!rdev->ops->del_mpath)
3118                 return -EOPNOTSUPP;
3119
3120         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3121 }
3122
3123 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3124 {
3125         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3126         struct net_device *dev = info->user_ptr[1];
3127         struct bss_parameters params;
3128
3129         memset(&params, 0, sizeof(params));
3130         /* default to not changing parameters */
3131         params.use_cts_prot = -1;
3132         params.use_short_preamble = -1;
3133         params.use_short_slot_time = -1;
3134         params.ap_isolate = -1;
3135         params.ht_opmode = -1;
3136
3137         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3138                 params.use_cts_prot =
3139                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3140         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3141                 params.use_short_preamble =
3142                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3143         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3144                 params.use_short_slot_time =
3145                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3146         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3147                 params.basic_rates =
3148                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3149                 params.basic_rates_len =
3150                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3151         }
3152         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3153                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3154         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3155                 params.ht_opmode =
3156                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3157
3158         if (!rdev->ops->change_bss)
3159                 return -EOPNOTSUPP;
3160
3161         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3162             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3163                 return -EOPNOTSUPP;
3164
3165         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3166 }
3167
3168 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3169         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3170         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3171         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3172         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3173         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3174         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3175 };
3176
3177 static int parse_reg_rule(struct nlattr *tb[],
3178         struct ieee80211_reg_rule *reg_rule)
3179 {
3180         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3181         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3182
3183         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3184                 return -EINVAL;
3185         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3186                 return -EINVAL;
3187         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3188                 return -EINVAL;
3189         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3190                 return -EINVAL;
3191         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3192                 return -EINVAL;
3193
3194         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3195
3196         freq_range->start_freq_khz =
3197                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3198         freq_range->end_freq_khz =
3199                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3200         freq_range->max_bandwidth_khz =
3201                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3202
3203         power_rule->max_eirp =
3204                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3205
3206         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3207                 power_rule->max_antenna_gain =
3208                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3209
3210         return 0;
3211 }
3212
3213 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3214 {
3215         int r;
3216         char *data = NULL;
3217
3218         /*
3219          * You should only get this when cfg80211 hasn't yet initialized
3220          * completely when built-in to the kernel right between the time
3221          * window between nl80211_init() and regulatory_init(), if that is
3222          * even possible.
3223          */
3224         mutex_lock(&cfg80211_mutex);
3225         if (unlikely(!cfg80211_regdomain)) {
3226                 mutex_unlock(&cfg80211_mutex);
3227                 return -EINPROGRESS;
3228         }
3229         mutex_unlock(&cfg80211_mutex);
3230
3231         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3232                 return -EINVAL;
3233
3234         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3235
3236         r = regulatory_hint_user(data);
3237
3238         return r;
3239 }
3240
3241 static int nl80211_get_mesh_config(struct sk_buff *skb,
3242                                    struct genl_info *info)
3243 {
3244         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3245         struct net_device *dev = info->user_ptr[1];
3246         struct wireless_dev *wdev = dev->ieee80211_ptr;
3247         struct mesh_config cur_params;
3248         int err = 0;
3249         void *hdr;
3250         struct nlattr *pinfoattr;
3251         struct sk_buff *msg;
3252
3253         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3254                 return -EOPNOTSUPP;
3255
3256         if (!rdev->ops->get_mesh_config)
3257                 return -EOPNOTSUPP;
3258
3259         wdev_lock(wdev);
3260         /* If not connected, get default parameters */
3261         if (!wdev->mesh_id_len)
3262                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3263         else
3264                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3265                                                  &cur_params);
3266         wdev_unlock(wdev);
3267
3268         if (err)
3269                 return err;
3270
3271         /* Draw up a netlink message to send back */
3272         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3273         if (!msg)
3274                 return -ENOMEM;
3275         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3276                              NL80211_CMD_GET_MESH_CONFIG);
3277         if (!hdr)
3278                 goto out;
3279         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3280         if (!pinfoattr)
3281                 goto nla_put_failure;
3282         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3283         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3284                         cur_params.dot11MeshRetryTimeout);
3285         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3286                         cur_params.dot11MeshConfirmTimeout);
3287         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3288                         cur_params.dot11MeshHoldingTimeout);
3289         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3290                         cur_params.dot11MeshMaxPeerLinks);
3291         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3292                         cur_params.dot11MeshMaxRetries);
3293         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3294                         cur_params.dot11MeshTTL);
3295         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3296                         cur_params.element_ttl);
3297         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3298                         cur_params.auto_open_plinks);
3299         NLA_PUT_U32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3300                         cur_params.dot11MeshNbrOffsetMaxNeighbor);
3301         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3302                         cur_params.dot11MeshHWMPmaxPREQretries);
3303         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3304                         cur_params.path_refresh_time);
3305         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3306                         cur_params.min_discovery_timeout);
3307         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3308                         cur_params.dot11MeshHWMPactivePathTimeout);
3309         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3310                         cur_params.dot11MeshHWMPpreqMinInterval);
3311         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3312                         cur_params.dot11MeshHWMPperrMinInterval);
3313         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3314                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3315         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3316                         cur_params.dot11MeshHWMPRootMode);
3317         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3318                         cur_params.dot11MeshHWMPRannInterval);
3319         NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3320                         cur_params.dot11MeshGateAnnouncementProtocol);
3321         NLA_PUT_U8(msg, NL80211_MESHCONF_FORWARDING,
3322                         cur_params.dot11MeshForwarding);
3323         NLA_PUT_U32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3324                         cur_params.rssi_threshold);
3325         nla_nest_end(msg, pinfoattr);
3326         genlmsg_end(msg, hdr);
3327         return genlmsg_reply(msg, info);
3328
3329  nla_put_failure:
3330         genlmsg_cancel(msg, hdr);
3331  out:
3332         nlmsg_free(msg);
3333         return -ENOBUFS;
3334 }
3335
3336 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3337         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3338         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3339         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3340         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3341         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3342         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3343         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3344         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3345         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3346
3347         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3348         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3349         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3350         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3351         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3352         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3353         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3354         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3355         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3356         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3357         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3358         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3359 };
3360
3361 static const struct nla_policy
3362         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3363         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3364         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3365         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3366         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3367         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3368                 .len = IEEE80211_MAX_DATA_LEN },
3369         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3370 };
3371
3372 static int nl80211_parse_mesh_config(struct genl_info *info,
3373                                      struct mesh_config *cfg,
3374                                      u32 *mask_out)
3375 {
3376         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3377         u32 mask = 0;
3378
3379 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3380 do {\
3381         if (table[attr_num]) {\
3382                 cfg->param = nla_fn(table[attr_num]); \
3383                 mask |= (1 << (attr_num - 1)); \
3384         } \
3385 } while (0);\
3386
3387
3388         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3389                 return -EINVAL;
3390         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3391                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3392                              nl80211_meshconf_params_policy))
3393                 return -EINVAL;
3394
3395         /* This makes sure that there aren't more than 32 mesh config
3396          * parameters (otherwise our bitfield scheme would not work.) */
3397         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3398
3399         /* Fill in the params struct */
3400         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3401                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3402         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3403                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3404         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3405                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3406         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3407                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3408         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3409                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3410         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3411                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3412         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3413                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3414         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3415                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3416         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
3417                         mask, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3418                         nla_get_u32);
3419         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3420                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3421                         nla_get_u8);
3422         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3423                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3424         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3425                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3426                         nla_get_u16);
3427         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3428                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3429                         nla_get_u32);
3430         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3431                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3432                         nla_get_u16);
3433         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3434                         mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3435                         nla_get_u16);
3436         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3437                         dot11MeshHWMPnetDiameterTraversalTime,
3438                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3439                         nla_get_u16);
3440         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3441                         dot11MeshHWMPRootMode, mask,
3442                         NL80211_MESHCONF_HWMP_ROOTMODE,
3443                         nla_get_u8);
3444         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3445                         dot11MeshHWMPRannInterval, mask,
3446                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3447                         nla_get_u16);
3448         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3449                         dot11MeshGateAnnouncementProtocol, mask,
3450                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3451                         nla_get_u8);
3452         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3453                         mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3454         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3455                         mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3456         if (mask_out)
3457                 *mask_out = mask;
3458
3459         return 0;
3460
3461 #undef FILL_IN_MESH_PARAM_IF_SET
3462 }
3463
3464 static int nl80211_parse_mesh_setup(struct genl_info *info,
3465                                      struct mesh_setup *setup)
3466 {
3467         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3468
3469         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3470                 return -EINVAL;
3471         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3472                              info->attrs[NL80211_ATTR_MESH_SETUP],
3473                              nl80211_mesh_setup_params_policy))
3474                 return -EINVAL;
3475
3476         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3477                 setup->sync_method =
3478                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3479                  IEEE80211_SYNC_METHOD_VENDOR :
3480                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3481
3482         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3483                 setup->path_sel_proto =
3484                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3485                  IEEE80211_PATH_PROTOCOL_VENDOR :
3486                  IEEE80211_PATH_PROTOCOL_HWMP;
3487
3488         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3489                 setup->path_metric =
3490                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3491                  IEEE80211_PATH_METRIC_VENDOR :
3492                  IEEE80211_PATH_METRIC_AIRTIME;
3493
3494
3495         if (tb[NL80211_MESH_SETUP_IE]) {
3496                 struct nlattr *ieattr =
3497                         tb[NL80211_MESH_SETUP_IE];
3498                 if (!is_valid_ie_attr(ieattr))
3499                         return -EINVAL;
3500                 setup->ie = nla_data(ieattr);
3501                 setup->ie_len = nla_len(ieattr);
3502         }
3503         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3504         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3505
3506         return 0;
3507 }
3508
3509 static int nl80211_update_mesh_config(struct sk_buff *skb,
3510                                       struct genl_info *info)
3511 {
3512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3513         struct net_device *dev = info->user_ptr[1];
3514         struct wireless_dev *wdev = dev->ieee80211_ptr;
3515         struct mesh_config cfg;
3516         u32 mask;
3517         int err;
3518
3519         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3520                 return -EOPNOTSUPP;
3521
3522         if (!rdev->ops->update_mesh_config)
3523                 return -EOPNOTSUPP;
3524
3525         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3526         if (err)
3527                 return err;
3528
3529         wdev_lock(wdev);
3530         if (!wdev->mesh_id_len)
3531                 err = -ENOLINK;
3532
3533         if (!err)
3534                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3535                                                     mask, &cfg);
3536
3537         wdev_unlock(wdev);
3538
3539         return err;
3540 }
3541
3542 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3543 {
3544         struct sk_buff *msg;
3545         void *hdr = NULL;
3546         struct nlattr *nl_reg_rules;
3547         unsigned int i;
3548         int err = -EINVAL;
3549
3550         mutex_lock(&cfg80211_mutex);
3551
3552         if (!cfg80211_regdomain)
3553                 goto out;
3554
3555         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3556         if (!msg) {
3557                 err = -ENOBUFS;
3558                 goto out;
3559         }
3560
3561         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3562                              NL80211_CMD_GET_REG);
3563         if (!hdr)
3564                 goto put_failure;
3565
3566         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3567                 cfg80211_regdomain->alpha2);
3568         if (cfg80211_regdomain->dfs_region)
3569                 NLA_PUT_U8(msg, NL80211_ATTR_DFS_REGION,
3570                            cfg80211_regdomain->dfs_region);
3571
3572         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3573         if (!nl_reg_rules)
3574                 goto nla_put_failure;
3575
3576         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3577                 struct nlattr *nl_reg_rule;
3578                 const struct ieee80211_reg_rule *reg_rule;
3579                 const struct ieee80211_freq_range *freq_range;
3580                 const struct ieee80211_power_rule *power_rule;
3581
3582                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3583                 freq_range = &reg_rule->freq_range;
3584                 power_rule = &reg_rule->power_rule;
3585
3586                 nl_reg_rule = nla_nest_start(msg, i);
3587                 if (!nl_reg_rule)
3588                         goto nla_put_failure;
3589
3590                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3591                         reg_rule->flags);
3592                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3593                         freq_range->start_freq_khz);
3594                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3595                         freq_range->end_freq_khz);
3596                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3597                         freq_range->max_bandwidth_khz);
3598                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3599                         power_rule->max_antenna_gain);
3600                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3601                         power_rule->max_eirp);
3602
3603                 nla_nest_end(msg, nl_reg_rule);
3604         }
3605
3606         nla_nest_end(msg, nl_reg_rules);
3607
3608         genlmsg_end(msg, hdr);
3609         err = genlmsg_reply(msg, info);
3610         goto out;
3611
3612 nla_put_failure:
3613         genlmsg_cancel(msg, hdr);
3614 put_failure:
3615         nlmsg_free(msg);
3616         err = -EMSGSIZE;
3617 out:
3618         mutex_unlock(&cfg80211_mutex);
3619         return err;
3620 }
3621
3622 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3623 {
3624         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3625         struct nlattr *nl_reg_rule;
3626         char *alpha2 = NULL;
3627         int rem_reg_rules = 0, r = 0;
3628         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3629         u8 dfs_region = 0;
3630         struct ieee80211_regdomain *rd = NULL;
3631
3632         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3633                 return -EINVAL;
3634
3635         if (!info->attrs[NL80211_ATTR_REG_RULES])
3636                 return -EINVAL;
3637
3638         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3639
3640         if (info->attrs[NL80211_ATTR_DFS_REGION])
3641                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3642
3643         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3644                         rem_reg_rules) {
3645                 num_rules++;
3646                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3647                         return -EINVAL;
3648         }
3649
3650         mutex_lock(&cfg80211_mutex);
3651
3652         if (!reg_is_valid_request(alpha2)) {
3653                 r = -EINVAL;
3654                 goto bad_reg;
3655         }
3656
3657         size_of_regd = sizeof(struct ieee80211_regdomain) +
3658                 (num_rules * sizeof(struct ieee80211_reg_rule));
3659
3660         rd = kzalloc(size_of_regd, GFP_KERNEL);
3661         if (!rd) {
3662                 r = -ENOMEM;
3663                 goto bad_reg;
3664         }
3665
3666         rd->n_reg_rules = num_rules;
3667         rd->alpha2[0] = alpha2[0];
3668         rd->alpha2[1] = alpha2[1];
3669
3670         /*
3671          * Disable DFS master mode if the DFS region was
3672          * not supported or known on this kernel.
3673          */
3674         if (reg_supported_dfs_region(dfs_region))
3675                 rd->dfs_region = dfs_region;
3676
3677         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3678                         rem_reg_rules) {
3679                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3680                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3681                         reg_rule_policy);
3682                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3683                 if (r)
3684                         goto bad_reg;
3685
3686                 rule_idx++;
3687
3688                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3689                         r = -EINVAL;
3690                         goto bad_reg;
3691                 }
3692         }
3693
3694         BUG_ON(rule_idx != num_rules);
3695
3696         r = set_regdom(rd);
3697
3698         mutex_unlock(&cfg80211_mutex);
3699
3700         return r;
3701
3702  bad_reg:
3703         mutex_unlock(&cfg80211_mutex);
3704         kfree(rd);
3705         return r;
3706 }
3707
3708 static int validate_scan_freqs(struct nlattr *freqs)
3709 {
3710         struct nlattr *attr1, *attr2;
3711         int n_channels = 0, tmp1, tmp2;
3712
3713         nla_for_each_nested(attr1, freqs, tmp1) {
3714                 n_channels++;
3715                 /*
3716                  * Some hardware has a limited channel list for
3717                  * scanning, and it is pretty much nonsensical
3718                  * to scan for a channel twice, so disallow that
3719                  * and don't require drivers to check that the
3720                  * channel list they get isn't longer than what
3721                  * they can scan, as long as they can scan all
3722                  * the channels they registered at once.
3723                  */
3724                 nla_for_each_nested(attr2, freqs, tmp2)
3725                         if (attr1 != attr2 &&
3726                             nla_get_u32(attr1) == nla_get_u32(attr2))
3727                                 return 0;
3728         }
3729
3730         return n_channels;
3731 }
3732
3733 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3734 {
3735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3736         struct net_device *dev = info->user_ptr[1];
3737         struct cfg80211_scan_request *request;
3738         struct nlattr *attr;
3739         struct wiphy *wiphy;
3740         int err, tmp, n_ssids = 0, n_channels, i;
3741         size_t ie_len;
3742
3743         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3744                 return -EINVAL;
3745
3746         wiphy = &rdev->wiphy;
3747
3748         if (!rdev->ops->scan)
3749                 return -EOPNOTSUPP;
3750
3751         if (rdev->scan_req)
3752                 return -EBUSY;
3753
3754         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3755                 n_channels = validate_scan_freqs(
3756                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3757                 if (!n_channels)
3758                         return -EINVAL;
3759         } else {
3760                 enum ieee80211_band band;
3761                 n_channels = 0;
3762
3763                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3764                         if (wiphy->bands[band])
3765                                 n_channels += wiphy->bands[band]->n_channels;
3766         }
3767
3768         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3769                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3770                         n_ssids++;
3771
3772         if (n_ssids > wiphy->max_scan_ssids)
3773                 return -EINVAL;
3774
3775         if (info->attrs[NL80211_ATTR_IE])
3776                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3777         else
3778                 ie_len = 0;
3779
3780         if (ie_len > wiphy->max_scan_ie_len)
3781                 return -EINVAL;
3782
3783         request = kzalloc(sizeof(*request)
3784                         + sizeof(*request->ssids) * n_ssids
3785                         + sizeof(*request->channels) * n_channels
3786                         + ie_len, GFP_KERNEL);
3787         if (!request)
3788                 return -ENOMEM;
3789
3790         if (n_ssids)
3791                 request->ssids = (void *)&request->channels[n_channels];
3792         request->n_ssids = n_ssids;
3793         if (ie_len) {
3794                 if (request->ssids)
3795                         request->ie = (void *)(request->ssids + n_ssids);
3796                 else
3797                         request->ie = (void *)(request->channels + n_channels);
3798         }
3799
3800         i = 0;
3801         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3802                 /* user specified, bail out if channel not found */
3803                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3804                         struct ieee80211_channel *chan;
3805
3806                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3807
3808                         if (!chan) {
3809                                 err = -EINVAL;
3810                                 goto out_free;
3811                         }
3812
3813                         /* ignore disabled channels */
3814                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3815                                 continue;
3816
3817                         request->channels[i] = chan;
3818                         i++;
3819                 }
3820         } else {
3821                 enum ieee80211_band band;
3822
3823                 /* all channels */
3824                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3825                         int j;
3826                         if (!wiphy->bands[band])
3827                                 continue;
3828                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3829                                 struct ieee80211_channel *chan;
3830
3831                                 chan = &wiphy->bands[band]->channels[j];
3832
3833                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3834                                         continue;
3835
3836                                 request->channels[i] = chan;
3837                                 i++;
3838                         }
3839                 }
3840         }
3841
3842         if (!i) {
3843                 err = -EINVAL;
3844                 goto out_free;
3845         }
3846
3847         request->n_channels = i;
3848
3849         i = 0;
3850         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3851                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3852                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3853                                 err = -EINVAL;
3854                                 goto out_free;
3855                         }
3856                         request->ssids[i].ssid_len = nla_len(attr);
3857                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3858                         i++;
3859                 }
3860         }
3861
3862         if (info->attrs[NL80211_ATTR_IE]) {
3863                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3864                 memcpy((void *)request->ie,
3865                        nla_data(info->attrs[NL80211_ATTR_IE]),
3866                        request->ie_len);
3867         }
3868
3869         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3870                 if (wiphy->bands[i])
3871                         request->rates[i] =
3872                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3873
3874         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3875                 nla_for_each_nested(attr,
3876                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3877                                     tmp) {
3878                         enum ieee80211_band band = nla_type(attr);
3879
3880                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3881                                 err = -EINVAL;
3882                                 goto out_free;
3883                         }
3884                         err = ieee80211_get_ratemask(wiphy->bands[band],
3885                                                      nla_data(attr),
3886                                                      nla_len(attr),
3887                                                      &request->rates[band]);
3888                         if (err)
3889                                 goto out_free;
3890                 }
3891         }
3892
3893         request->no_cck =
3894                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3895
3896         request->dev = dev;
3897         request->wiphy = &rdev->wiphy;
3898
3899         rdev->scan_req = request;
3900         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3901
3902         if (!err) {
3903                 nl80211_send_scan_start(rdev, dev);
3904                 dev_hold(dev);
3905         } else {
3906  out_free:
3907                 rdev->scan_req = NULL;
3908                 kfree(request);
3909         }
3910
3911         return err;
3912 }
3913
3914 static int nl80211_start_sched_scan(struct sk_buff *skb,
3915                                     struct genl_info *info)
3916 {
3917         struct cfg80211_sched_scan_request *request;
3918         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3919         struct net_device *dev = info->user_ptr[1];
3920         struct nlattr *attr;
3921         struct wiphy *wiphy;
3922         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3923         u32 interval;
3924         enum ieee80211_band band;
3925         size_t ie_len;
3926         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3927
3928         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3929             !rdev->ops->sched_scan_start)
3930                 return -EOPNOTSUPP;
3931
3932         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3933                 return -EINVAL;
3934
3935         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3936                 return -EINVAL;
3937
3938         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3939         if (interval == 0)
3940                 return -EINVAL;
3941
3942         wiphy = &rdev->wiphy;
3943
3944         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3945                 n_channels = validate_scan_freqs(
3946                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3947                 if (!n_channels)
3948                         return -EINVAL;
3949         } else {
3950                 n_channels = 0;
3951
3952                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3953                         if (wiphy->bands[band])
3954                                 n_channels += wiphy->bands[band]->n_channels;
3955         }
3956
3957         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3958                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3959                                     tmp)
3960                         n_ssids++;
3961
3962         if (n_ssids > wiphy->max_sched_scan_ssids)
3963                 return -EINVAL;
3964
3965         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3966                 nla_for_each_nested(attr,
3967                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3968                                     tmp)
3969                         n_match_sets++;
3970
3971         if (n_match_sets > wiphy->max_match_sets)
3972                 return -EINVAL;
3973
3974         if (info->attrs[NL80211_ATTR_IE])
3975                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3976         else
3977                 ie_len = 0;
3978
3979         if (ie_len > wiphy->max_sched_scan_ie_len)
3980                 return -EINVAL;
3981
3982         mutex_lock(&rdev->sched_scan_mtx);
3983
3984         if (rdev->sched_scan_req) {
3985                 err = -EINPROGRESS;
3986                 goto out;
3987         }
3988
3989         request = kzalloc(sizeof(*request)
3990                         + sizeof(*request->ssids) * n_ssids
3991                         + sizeof(*request->match_sets) * n_match_sets
3992                         + sizeof(*request->channels) * n_channels
3993                         + ie_len, GFP_KERNEL);
3994         if (!request) {
3995                 err = -ENOMEM;
3996                 goto out;
3997         }
3998
3999         if (n_ssids)
4000                 request->ssids = (void *)&request->channels[n_channels];
4001         request->n_ssids = n_ssids;
4002         if (ie_len) {
4003                 if (request->ssids)
4004                         request->ie = (void *)(request->ssids + n_ssids);
4005                 else
4006                         request->ie = (void *)(request->channels + n_channels);
4007         }
4008
4009         if (n_match_sets) {
4010                 if (request->ie)
4011                         request->match_sets = (void *)(request->ie + ie_len);
4012                 else if (request->ssids)
4013                         request->match_sets =
4014                                 (void *)(request->ssids + n_ssids);
4015                 else
4016                         request->match_sets =
4017                                 (void *)(request->channels + n_channels);
4018         }
4019         request->n_match_sets = n_match_sets;
4020
4021         i = 0;
4022         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4023                 /* user specified, bail out if channel not found */
4024                 nla_for_each_nested(attr,
4025                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4026                                     tmp) {
4027                         struct ieee80211_channel *chan;
4028
4029                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4030
4031                         if (!chan) {
4032                                 err = -EINVAL;
4033                                 goto out_free;
4034                         }
4035
4036                         /* ignore disabled channels */
4037                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4038                                 continue;
4039
4040                         request->channels[i] = chan;
4041                         i++;
4042                 }
4043         } else {
4044                 /* all channels */
4045                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4046                         int j;
4047                         if (!wiphy->bands[band])
4048                                 continue;
4049                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4050                                 struct ieee80211_channel *chan;
4051
4052                                 chan = &wiphy->bands[band]->channels[j];
4053
4054                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4055                                         continue;
4056
4057                                 request->channels[i] = chan;
4058                                 i++;
4059                         }
4060                 }
4061         }
4062
4063         if (!i) {
4064                 err = -EINVAL;
4065                 goto out_free;
4066         }
4067
4068         request->n_channels = i;
4069
4070         i = 0;
4071         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4072                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4073                                     tmp) {
4074                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4075                                 err = -EINVAL;
4076                                 goto out_free;
4077                         }
4078                         request->ssids[i].ssid_len = nla_len(attr);
4079                         memcpy(request->ssids[i].ssid, nla_data(attr),
4080                                nla_len(attr));
4081                         i++;
4082                 }
4083         }
4084
4085         i = 0;
4086         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4087                 nla_for_each_nested(attr,
4088                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4089                                     tmp) {
4090                         struct nlattr *ssid;
4091
4092                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4093                                   nla_data(attr), nla_len(attr),
4094                                   nl80211_match_policy);
4095                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4096                         if (ssid) {
4097                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4098                                         err = -EINVAL;
4099                                         goto out_free;
4100                                 }
4101                                 memcpy(request->match_sets[i].ssid.ssid,
4102                                        nla_data(ssid), nla_len(ssid));
4103                                 request->match_sets[i].ssid.ssid_len =
4104                                         nla_len(ssid);
4105                         }
4106                         i++;
4107                 }
4108         }
4109
4110         if (info->attrs[NL80211_ATTR_IE]) {
4111                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4112                 memcpy((void *)request->ie,
4113                        nla_data(info->attrs[NL80211_ATTR_IE]),
4114                        request->ie_len);
4115         }
4116
4117         request->dev = dev;
4118         request->wiphy = &rdev->wiphy;
4119         request->interval = interval;
4120
4121         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4122         if (!err) {
4123                 rdev->sched_scan_req = request;
4124                 nl80211_send_sched_scan(rdev, dev,
4125                                         NL80211_CMD_START_SCHED_SCAN);
4126                 goto out;
4127         }
4128
4129 out_free:
4130         kfree(request);
4131 out:
4132         mutex_unlock(&rdev->sched_scan_mtx);
4133         return err;
4134 }
4135
4136 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4137                                    struct genl_info *info)
4138 {
4139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4140         int err;
4141
4142         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4143             !rdev->ops->sched_scan_stop)
4144                 return -EOPNOTSUPP;
4145
4146         mutex_lock(&rdev->sched_scan_mtx);
4147         err = __cfg80211_stop_sched_scan(rdev, false);
4148         mutex_unlock(&rdev->sched_scan_mtx);
4149
4150         return err;
4151 }
4152
4153 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4154                             u32 seq, int flags,
4155                             struct cfg80211_registered_device *rdev,
4156                             struct wireless_dev *wdev,
4157                             struct cfg80211_internal_bss *intbss)
4158 {
4159         struct cfg80211_bss *res = &intbss->pub;
4160         void *hdr;
4161         struct nlattr *bss;
4162
4163         ASSERT_WDEV_LOCK(wdev);
4164
4165         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4166                              NL80211_CMD_NEW_SCAN_RESULTS);
4167         if (!hdr)
4168                 return -1;
4169
4170         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4171
4172         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
4173         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
4174
4175         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4176         if (!bss)
4177                 goto nla_put_failure;
4178         if (!is_zero_ether_addr(res->bssid))
4179                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
4180         if (res->information_elements && res->len_information_elements)
4181                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4182                         res->len_information_elements,
4183                         res->information_elements);
4184         if (res->beacon_ies && res->len_beacon_ies &&
4185             res->beacon_ies != res->information_elements)
4186                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
4187                         res->len_beacon_ies, res->beacon_ies);
4188         if (res->tsf)
4189                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
4190         if (res->beacon_interval)
4191                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
4192         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
4193         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
4194         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
4195                 jiffies_to_msecs(jiffies - intbss->ts));
4196
4197         switch (rdev->wiphy.signal_type) {
4198         case CFG80211_SIGNAL_TYPE_MBM:
4199                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
4200                 break;
4201         case CFG80211_SIGNAL_TYPE_UNSPEC:
4202                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
4203                 break;
4204         default:
4205                 break;
4206         }
4207
4208         switch (wdev->iftype) {
4209         case NL80211_IFTYPE_P2P_CLIENT:
4210         case NL80211_IFTYPE_STATION:
4211                 if (intbss == wdev->current_bss)
4212                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4213                                     NL80211_BSS_STATUS_ASSOCIATED);
4214                 break;
4215         case NL80211_IFTYPE_ADHOC:
4216                 if (intbss == wdev->current_bss)
4217                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4218                                     NL80211_BSS_STATUS_IBSS_JOINED);
4219                 break;
4220         default:
4221                 break;
4222         }
4223
4224         nla_nest_end(msg, bss);
4225
4226         return genlmsg_end(msg, hdr);
4227
4228  nla_put_failure:
4229         genlmsg_cancel(msg, hdr);
4230         return -EMSGSIZE;
4231 }
4232
4233 static int nl80211_dump_scan(struct sk_buff *skb,
4234                              struct netlink_callback *cb)
4235 {
4236         struct cfg80211_registered_device *rdev;
4237         struct net_device *dev;
4238         struct cfg80211_internal_bss *scan;
4239         struct wireless_dev *wdev;
4240         int start = cb->args[1], idx = 0;
4241         int err;
4242
4243         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4244         if (err)
4245                 return err;
4246
4247         wdev = dev->ieee80211_ptr;
4248
4249         wdev_lock(wdev);
4250         spin_lock_bh(&rdev->bss_lock);
4251         cfg80211_bss_expire(rdev);
4252
4253         cb->seq = rdev->bss_generation;
4254
4255         list_for_each_entry(scan, &rdev->bss_list, list) {
4256                 if (++idx <= start)
4257                         continue;
4258                 if (nl80211_send_bss(skb, cb,
4259                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4260                                 rdev, wdev, scan) < 0) {
4261                         idx--;
4262                         break;
4263                 }
4264         }
4265
4266         spin_unlock_bh(&rdev->bss_lock);
4267         wdev_unlock(wdev);
4268
4269         cb->args[1] = idx;
4270         nl80211_finish_netdev_dump(rdev);
4271
4272         return skb->len;
4273 }
4274
4275 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4276                                 int flags, struct net_device *dev,
4277                                 struct survey_info *survey)
4278 {
4279         void *hdr;
4280         struct nlattr *infoattr;
4281
4282         hdr = nl80211hdr_put(msg, pid, seq, flags,
4283                              NL80211_CMD_NEW_SURVEY_RESULTS);
4284         if (!hdr)
4285                 return -ENOMEM;
4286
4287         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4288
4289         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4290         if (!infoattr)
4291                 goto nla_put_failure;
4292
4293         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4294                     survey->channel->center_freq);
4295         if (survey->filled & SURVEY_INFO_NOISE_DBM)
4296                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4297                             survey->noise);
4298         if (survey->filled & SURVEY_INFO_IN_USE)
4299                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4300         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4301                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4302                             survey->channel_time);
4303         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4304                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4305                             survey->channel_time_busy);
4306         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4307                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4308                             survey->channel_time_ext_busy);
4309         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4310                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4311                             survey->channel_time_rx);
4312         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4313                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4314                             survey->channel_time_tx);
4315
4316         nla_nest_end(msg, infoattr);
4317
4318         return genlmsg_end(msg, hdr);
4319
4320  nla_put_failure:
4321         genlmsg_cancel(msg, hdr);
4322         return -EMSGSIZE;
4323 }
4324
4325 static int nl80211_dump_survey(struct sk_buff *skb,
4326                         struct netlink_callback *cb)
4327 {
4328         struct survey_info survey;
4329         struct cfg80211_registered_device *dev;
4330         struct net_device *netdev;
4331         int survey_idx = cb->args[1];
4332         int res;
4333
4334         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4335         if (res)
4336                 return res;
4337
4338         if (!dev->ops->dump_survey) {
4339                 res = -EOPNOTSUPP;
4340                 goto out_err;
4341         }
4342
4343         while (1) {
4344                 struct ieee80211_channel *chan;
4345
4346                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4347                                             &survey);
4348                 if (res == -ENOENT)
4349                         break;
4350                 if (res)
4351                         goto out_err;
4352
4353                 /* Survey without a channel doesn't make sense */
4354                 if (!survey.channel) {
4355                         res = -EINVAL;
4356                         goto out;
4357                 }
4358
4359                 chan = ieee80211_get_channel(&dev->wiphy,
4360                                              survey.channel->center_freq);
4361                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4362                         survey_idx++;
4363                         continue;
4364                 }
4365
4366                 if (nl80211_send_survey(skb,
4367                                 NETLINK_CB(cb->skb).pid,
4368                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4369                                 netdev,
4370                                 &survey) < 0)
4371                         goto out;
4372                 survey_idx++;
4373         }
4374
4375  out:
4376         cb->args[1] = survey_idx;
4377         res = skb->len;
4378  out_err:
4379         nl80211_finish_netdev_dump(dev);
4380         return res;
4381 }
4382
4383 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4384 {
4385         return auth_type <= NL80211_AUTHTYPE_MAX;
4386 }
4387
4388 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4389 {
4390         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4391                                   NL80211_WPA_VERSION_2));
4392 }
4393
4394 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4395 {
4396         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4397         struct net_device *dev = info->user_ptr[1];
4398         struct ieee80211_channel *chan;
4399         const u8 *bssid, *ssid, *ie = NULL;
4400         int err, ssid_len, ie_len = 0;
4401         enum nl80211_auth_type auth_type;
4402         struct key_parse key;
4403         bool local_state_change;
4404
4405         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4406                 return -EINVAL;
4407
4408         if (!info->attrs[NL80211_ATTR_MAC])
4409                 return -EINVAL;
4410
4411         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4412                 return -EINVAL;
4413
4414         if (!info->attrs[NL80211_ATTR_SSID])
4415                 return -EINVAL;
4416
4417         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4418                 return -EINVAL;
4419
4420         err = nl80211_parse_key(info, &key);
4421         if (err)
4422                 return err;
4423
4424         if (key.idx >= 0) {
4425                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4426                         return -EINVAL;
4427                 if (!key.p.key || !key.p.key_len)
4428                         return -EINVAL;
4429                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4430                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4431                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4432                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4433                         return -EINVAL;
4434                 if (key.idx > 4)
4435                         return -EINVAL;
4436         } else {
4437                 key.p.key_len = 0;
4438                 key.p.key = NULL;
4439         }
4440
4441         if (key.idx >= 0) {
4442                 int i;
4443                 bool ok = false;
4444                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4445                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4446                                 ok = true;
4447                                 break;
4448                         }
4449                 }
4450                 if (!ok)
4451                         return -EINVAL;
4452         }
4453
4454         if (!rdev->ops->auth)
4455                 return -EOPNOTSUPP;
4456
4457         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4458             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4459                 return -EOPNOTSUPP;
4460
4461         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4462         chan = ieee80211_get_channel(&rdev->wiphy,
4463                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4464         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4465                 return -EINVAL;
4466
4467         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4468         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4469
4470         if (info->attrs[NL80211_ATTR_IE]) {
4471                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4472                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4473         }
4474
4475         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4476         if (!nl80211_valid_auth_type(auth_type))
4477                 return -EINVAL;
4478
4479         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4480
4481         /*
4482          * Since we no longer track auth state, ignore
4483          * requests to only change local state.
4484          */
4485         if (local_state_change)
4486                 return 0;
4487
4488         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4489                                   ssid, ssid_len, ie, ie_len,
4490                                   key.p.key, key.p.key_len, key.idx);
4491 }
4492
4493 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4494                                    struct genl_info *info,
4495                                    struct cfg80211_crypto_settings *settings,
4496                                    int cipher_limit)
4497 {
4498         memset(settings, 0, sizeof(*settings));
4499
4500         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4501
4502         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4503                 u16 proto;
4504                 proto = nla_get_u16(
4505                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4506                 settings->control_port_ethertype = cpu_to_be16(proto);
4507                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4508                     proto != ETH_P_PAE)
4509                         return -EINVAL;
4510                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4511                         settings->control_port_no_encrypt = true;
4512         } else
4513                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4514
4515         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4516                 void *data;
4517                 int len, i;
4518
4519                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4520                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4521                 settings->n_ciphers_pairwise = len / sizeof(u32);
4522
4523                 if (len % sizeof(u32))
4524                         return -EINVAL;
4525
4526                 if (settings->n_ciphers_pairwise > cipher_limit)
4527                         return -EINVAL;
4528
4529                 memcpy(settings->ciphers_pairwise, data, len);
4530
4531                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4532                         if (!cfg80211_supported_cipher_suite(
4533                                         &rdev->wiphy,
4534                                         settings->ciphers_pairwise[i]))
4535                                 return -EINVAL;
4536         }
4537
4538         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4539                 settings->cipher_group =
4540                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4541                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4542                                                      settings->cipher_group))
4543                         return -EINVAL;
4544         }
4545
4546         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4547                 settings->wpa_versions =
4548                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4549                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4550                         return -EINVAL;
4551         }
4552
4553         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4554                 void *data;
4555                 int len;
4556
4557                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4558                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4559                 settings->n_akm_suites = len / sizeof(u32);
4560
4561                 if (len % sizeof(u32))
4562                         return -EINVAL;
4563
4564                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4565                         return -EINVAL;
4566
4567                 memcpy(settings->akm_suites, data, len);
4568         }
4569
4570         return 0;
4571 }
4572
4573 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4574 {
4575         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4576         struct net_device *dev = info->user_ptr[1];
4577         struct cfg80211_crypto_settings crypto;
4578         struct ieee80211_channel *chan;
4579         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4580         int err, ssid_len, ie_len = 0;
4581         bool use_mfp = false;
4582         u32 flags = 0;
4583         struct ieee80211_ht_cap *ht_capa = NULL;
4584         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4585
4586         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4587                 return -EINVAL;
4588
4589         if (!info->attrs[NL80211_ATTR_MAC] ||
4590             !info->attrs[NL80211_ATTR_SSID] ||
4591             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4592                 return -EINVAL;
4593
4594         if (!rdev->ops->assoc)
4595                 return -EOPNOTSUPP;
4596
4597         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4598             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4599                 return -EOPNOTSUPP;
4600
4601         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4602
4603         chan = ieee80211_get_channel(&rdev->wiphy,
4604                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4605         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4606                 return -EINVAL;
4607
4608         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4609         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4610
4611         if (info->attrs[NL80211_ATTR_IE]) {
4612                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4613                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4614         }
4615
4616         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4617                 enum nl80211_mfp mfp =
4618                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4619                 if (mfp == NL80211_MFP_REQUIRED)
4620                         use_mfp = true;
4621                 else if (mfp != NL80211_MFP_NO)
4622                         return -EINVAL;
4623         }
4624
4625         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4626                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4627
4628         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4629                 flags |= ASSOC_REQ_DISABLE_HT;
4630
4631         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4632                 ht_capa_mask =
4633                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4634
4635         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4636                 if (!ht_capa_mask)
4637                         return -EINVAL;
4638                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4639         }
4640
4641         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4642         if (!err)
4643                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4644                                           ssid, ssid_len, ie, ie_len, use_mfp,
4645                                           &crypto, flags, ht_capa,
4646                                           ht_capa_mask);
4647
4648         return err;
4649 }
4650
4651 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4652 {
4653         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4654         struct net_device *dev = info->user_ptr[1];
4655         const u8 *ie = NULL, *bssid;
4656         int ie_len = 0;
4657         u16 reason_code;
4658         bool local_state_change;
4659
4660         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4661                 return -EINVAL;
4662
4663         if (!info->attrs[NL80211_ATTR_MAC])
4664                 return -EINVAL;
4665
4666         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4667                 return -EINVAL;
4668
4669         if (!rdev->ops->deauth)
4670                 return -EOPNOTSUPP;
4671
4672         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4673             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4674                 return -EOPNOTSUPP;
4675
4676         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4677
4678         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4679         if (reason_code == 0) {
4680                 /* Reason Code 0 is reserved */
4681                 return -EINVAL;
4682         }
4683
4684         if (info->attrs[NL80211_ATTR_IE]) {
4685                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4686                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4687         }
4688
4689         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4690
4691         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4692                                     local_state_change);
4693 }
4694
4695 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4696 {
4697         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4698         struct net_device *dev = info->user_ptr[1];
4699         const u8 *ie = NULL, *bssid;
4700         int ie_len = 0;
4701         u16 reason_code;
4702         bool local_state_change;
4703
4704         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4705                 return -EINVAL;
4706
4707         if (!info->attrs[NL80211_ATTR_MAC])
4708                 return -EINVAL;
4709
4710         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4711                 return -EINVAL;
4712
4713         if (!rdev->ops->disassoc)
4714                 return -EOPNOTSUPP;
4715
4716         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4717             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4718                 return -EOPNOTSUPP;
4719
4720         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4721
4722         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4723         if (reason_code == 0) {
4724                 /* Reason Code 0 is reserved */
4725                 return -EINVAL;
4726         }
4727
4728         if (info->attrs[NL80211_ATTR_IE]) {
4729                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4730                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4731         }
4732
4733         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4734
4735         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4736                                       local_state_change);
4737 }
4738
4739 static bool
4740 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4741                          int mcast_rate[IEEE80211_NUM_BANDS],
4742                          int rateval)
4743 {
4744         struct wiphy *wiphy = &rdev->wiphy;
4745         bool found = false;
4746         int band, i;
4747
4748         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4749                 struct ieee80211_supported_band *sband;
4750
4751                 sband = wiphy->bands[band];
4752                 if (!sband)
4753                         continue;
4754
4755                 for (i = 0; i < sband->n_bitrates; i++) {
4756                         if (sband->bitrates[i].bitrate == rateval) {
4757                                 mcast_rate[band] = i + 1;
4758                                 found = true;
4759                                 break;
4760                         }
4761                 }
4762         }
4763
4764         return found;
4765 }
4766
4767 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4768 {
4769         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4770         struct net_device *dev = info->user_ptr[1];
4771         struct cfg80211_ibss_params ibss;
4772         struct wiphy *wiphy;
4773         struct cfg80211_cached_keys *connkeys = NULL;
4774         int err;
4775
4776         memset(&ibss, 0, sizeof(ibss));
4777
4778         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4779                 return -EINVAL;
4780
4781         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4782             !info->attrs[NL80211_ATTR_SSID] ||
4783             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4784                 return -EINVAL;
4785
4786         ibss.beacon_interval = 100;
4787
4788         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4789                 ibss.beacon_interval =
4790                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4791                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4792                         return -EINVAL;
4793         }
4794
4795         if (!rdev->ops->join_ibss)
4796                 return -EOPNOTSUPP;
4797
4798         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4799                 return -EOPNOTSUPP;
4800
4801         wiphy = &rdev->wiphy;
4802
4803         if (info->attrs[NL80211_ATTR_MAC]) {
4804                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4805
4806                 if (!is_valid_ether_addr(ibss.bssid))
4807                         return -EINVAL;
4808         }
4809         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4810         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4811
4812         if (info->attrs[NL80211_ATTR_IE]) {
4813                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4814                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4815         }
4816
4817         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4818                 enum nl80211_channel_type channel_type;
4819
4820                 channel_type = nla_get_u32(
4821                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4822                 if (channel_type != NL80211_CHAN_NO_HT &&
4823                     channel_type != NL80211_CHAN_HT20 &&
4824                     channel_type != NL80211_CHAN_HT40MINUS &&
4825                     channel_type != NL80211_CHAN_HT40PLUS)
4826                         return -EINVAL;
4827
4828                 if (channel_type != NL80211_CHAN_NO_HT &&
4829                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4830                         return -EINVAL;
4831
4832                 ibss.channel_type = channel_type;
4833         } else {
4834                 ibss.channel_type = NL80211_CHAN_NO_HT;
4835         }
4836
4837         ibss.channel = rdev_freq_to_chan(rdev,
4838                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4839                 ibss.channel_type);
4840         if (!ibss.channel ||
4841             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4842             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4843                 return -EINVAL;
4844
4845         /* Both channels should be able to initiate communication */
4846         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4847              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4848             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4849                                           ibss.channel_type))
4850                 return -EINVAL;
4851
4852         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4853         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4854
4855         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4856                 u8 *rates =
4857                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4858                 int n_rates =
4859                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4860                 struct ieee80211_supported_band *sband =
4861                         wiphy->bands[ibss.channel->band];
4862
4863                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4864                                              &ibss.basic_rates);
4865                 if (err)
4866                         return err;
4867         }
4868
4869         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4870             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4871                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4872                 return -EINVAL;
4873
4874         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4875                 connkeys = nl80211_parse_connkeys(rdev,
4876                                         info->attrs[NL80211_ATTR_KEYS]);
4877                 if (IS_ERR(connkeys))
4878                         return PTR_ERR(connkeys);
4879         }
4880
4881         ibss.control_port =
4882                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4883
4884         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4885         if (err)
4886                 kfree(connkeys);
4887         return err;
4888 }
4889
4890 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4891 {
4892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4893         struct net_device *dev = info->user_ptr[1];
4894
4895         if (!rdev->ops->leave_ibss)
4896                 return -EOPNOTSUPP;
4897
4898         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4899                 return -EOPNOTSUPP;
4900
4901         return cfg80211_leave_ibss(rdev, dev, false);
4902 }
4903
4904 #ifdef CONFIG_NL80211_TESTMODE
4905 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4906         .name = "testmode",
4907 };
4908
4909 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4910 {
4911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4912         int err;
4913
4914         if (!info->attrs[NL80211_ATTR_TESTDATA])
4915                 return -EINVAL;
4916
4917         err = -EOPNOTSUPP;
4918         if (rdev->ops->testmode_cmd) {
4919                 rdev->testmode_info = info;
4920                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4921                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4922                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4923                 rdev->testmode_info = NULL;
4924         }
4925
4926         return err;
4927 }
4928
4929 static int nl80211_testmode_dump(struct sk_buff *skb,
4930                                  struct netlink_callback *cb)
4931 {
4932         struct cfg80211_registered_device *rdev;
4933         int err;
4934         long phy_idx;
4935         void *data = NULL;
4936         int data_len = 0;
4937
4938         if (cb->args[0]) {
4939                 /*
4940                  * 0 is a valid index, but not valid for args[0],
4941                  * so we need to offset by 1.
4942                  */
4943                 phy_idx = cb->args[0] - 1;
4944         } else {
4945                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4946                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4947                                   nl80211_policy);
4948                 if (err)
4949                         return err;
4950                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
4951                         phy_idx = nla_get_u32(
4952                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4953                 } else {
4954                         struct net_device *netdev;
4955
4956                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
4957                                                       nl80211_fam.attrbuf,
4958                                                       &rdev, &netdev);
4959                         if (err)
4960                                 return err;
4961                         dev_put(netdev);
4962                         phy_idx = rdev->wiphy_idx;
4963                         cfg80211_unlock_rdev(rdev);
4964                 }
4965                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4966                         cb->args[1] =
4967                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4968         }
4969
4970         if (cb->args[1]) {
4971                 data = nla_data((void *)cb->args[1]);
4972                 data_len = nla_len((void *)cb->args[1]);
4973         }
4974
4975         mutex_lock(&cfg80211_mutex);
4976         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4977         if (!rdev) {
4978                 mutex_unlock(&cfg80211_mutex);
4979                 return -ENOENT;
4980         }
4981         cfg80211_lock_rdev(rdev);
4982         mutex_unlock(&cfg80211_mutex);
4983
4984         if (!rdev->ops->testmode_dump) {
4985                 err = -EOPNOTSUPP;
4986                 goto out_err;
4987         }
4988
4989         while (1) {
4990                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4991                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4992                                            NL80211_CMD_TESTMODE);
4993                 struct nlattr *tmdata;
4994
4995                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx) < 0) {
4996                         genlmsg_cancel(skb, hdr);
4997                         break;
4998                 }
4999
5000                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5001                 if (!tmdata) {
5002                         genlmsg_cancel(skb, hdr);
5003                         break;
5004                 }
5005                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5006                                                data, data_len);
5007                 nla_nest_end(skb, tmdata);
5008
5009                 if (err == -ENOBUFS || err == -ENOENT) {
5010                         genlmsg_cancel(skb, hdr);
5011                         break;
5012                 } else if (err) {
5013                         genlmsg_cancel(skb, hdr);
5014                         goto out_err;
5015                 }
5016
5017                 genlmsg_end(skb, hdr);
5018         }
5019
5020         err = skb->len;
5021         /* see above */
5022         cb->args[0] = phy_idx + 1;
5023  out_err:
5024         cfg80211_unlock_rdev(rdev);
5025         return err;
5026 }
5027
5028 static struct sk_buff *
5029 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5030                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5031 {
5032         struct sk_buff *skb;
5033         void *hdr;
5034         struct nlattr *data;
5035
5036         skb = nlmsg_new(approxlen + 100, gfp);
5037         if (!skb)
5038                 return NULL;
5039
5040         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5041         if (!hdr) {
5042                 kfree_skb(skb);
5043                 return NULL;
5044         }
5045
5046         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5047         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5048
5049         ((void **)skb->cb)[0] = rdev;
5050         ((void **)skb->cb)[1] = hdr;
5051         ((void **)skb->cb)[2] = data;
5052
5053         return skb;
5054
5055  nla_put_failure:
5056         kfree_skb(skb);
5057         return NULL;
5058 }
5059
5060 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5061                                                   int approxlen)
5062 {
5063         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5064
5065         if (WARN_ON(!rdev->testmode_info))
5066                 return NULL;
5067
5068         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5069                                 rdev->testmode_info->snd_pid,
5070                                 rdev->testmode_info->snd_seq,
5071                                 GFP_KERNEL);
5072 }
5073 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5074
5075 int cfg80211_testmode_reply(struct sk_buff *skb)
5076 {
5077         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5078         void *hdr = ((void **)skb->cb)[1];
5079         struct nlattr *data = ((void **)skb->cb)[2];
5080
5081         if (WARN_ON(!rdev->testmode_info)) {
5082                 kfree_skb(skb);
5083                 return -EINVAL;
5084         }
5085
5086         nla_nest_end(skb, data);
5087         genlmsg_end(skb, hdr);
5088         return genlmsg_reply(skb, rdev->testmode_info);
5089 }
5090 EXPORT_SYMBOL(cfg80211_testmode_reply);
5091
5092 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5093                                                   int approxlen, gfp_t gfp)
5094 {
5095         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5096
5097         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5098 }
5099 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5100
5101 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5102 {
5103         void *hdr = ((void **)skb->cb)[1];
5104         struct nlattr *data = ((void **)skb->cb)[2];
5105
5106         nla_nest_end(skb, data);
5107         genlmsg_end(skb, hdr);
5108         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5109 }
5110 EXPORT_SYMBOL(cfg80211_testmode_event);
5111 #endif
5112
5113 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5114 {
5115         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5116         struct net_device *dev = info->user_ptr[1];
5117         struct cfg80211_connect_params connect;
5118         struct wiphy *wiphy;
5119         struct cfg80211_cached_keys *connkeys = NULL;
5120         int err;
5121
5122         memset(&connect, 0, sizeof(connect));
5123
5124         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5125                 return -EINVAL;
5126
5127         if (!info->attrs[NL80211_ATTR_SSID] ||
5128             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5129                 return -EINVAL;
5130
5131         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5132                 connect.auth_type =
5133                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5134                 if (!nl80211_valid_auth_type(connect.auth_type))
5135                         return -EINVAL;
5136         } else
5137                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5138
5139         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5140
5141         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5142                                       NL80211_MAX_NR_CIPHER_SUITES);
5143         if (err)
5144                 return err;
5145
5146         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5147             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5148                 return -EOPNOTSUPP;
5149
5150         wiphy = &rdev->wiphy;
5151
5152         connect.bg_scan_period = -1;
5153         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5154                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5155                 connect.bg_scan_period =
5156                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5157         }
5158
5159         if (info->attrs[NL80211_ATTR_MAC])
5160                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5161         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5162         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5163
5164         if (info->attrs[NL80211_ATTR_IE]) {
5165                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5166                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5167         }
5168
5169         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5170                 connect.channel =
5171                         ieee80211_get_channel(wiphy,
5172                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5173                 if (!connect.channel ||
5174                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5175                         return -EINVAL;
5176         }
5177
5178         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5179                 connkeys = nl80211_parse_connkeys(rdev,
5180                                         info->attrs[NL80211_ATTR_KEYS]);
5181                 if (IS_ERR(connkeys))
5182                         return PTR_ERR(connkeys);
5183         }
5184
5185         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5186                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5187
5188         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5189                 memcpy(&connect.ht_capa_mask,
5190                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5191                        sizeof(connect.ht_capa_mask));
5192
5193         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5194                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5195                         return -EINVAL;
5196                 memcpy(&connect.ht_capa,
5197                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5198                        sizeof(connect.ht_capa));
5199         }
5200
5201         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5202         if (err)
5203                 kfree(connkeys);
5204         return err;
5205 }
5206
5207 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5208 {
5209         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5210         struct net_device *dev = info->user_ptr[1];
5211         u16 reason;
5212
5213         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5214                 reason = WLAN_REASON_DEAUTH_LEAVING;
5215         else
5216                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5217
5218         if (reason == 0)
5219                 return -EINVAL;
5220
5221         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5222             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5223                 return -EOPNOTSUPP;
5224
5225         return cfg80211_disconnect(rdev, dev, reason, true);
5226 }
5227
5228 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5229 {
5230         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5231         struct net *net;
5232         int err;
5233         u32 pid;
5234
5235         if (!info->attrs[NL80211_ATTR_PID])
5236                 return -EINVAL;
5237
5238         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5239
5240         net = get_net_ns_by_pid(pid);
5241         if (IS_ERR(net))
5242                 return PTR_ERR(net);
5243
5244         err = 0;
5245
5246         /* check if anything to do */
5247         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5248                 err = cfg80211_switch_netns(rdev, net);
5249
5250         put_net(net);
5251         return err;
5252 }
5253
5254 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5255 {
5256         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5257         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5258                         struct cfg80211_pmksa *pmksa) = NULL;
5259         struct net_device *dev = info->user_ptr[1];
5260         struct cfg80211_pmksa pmksa;
5261
5262         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5263
5264         if (!info->attrs[NL80211_ATTR_MAC])
5265                 return -EINVAL;
5266
5267         if (!info->attrs[NL80211_ATTR_PMKID])
5268                 return -EINVAL;
5269
5270         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5271         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5272
5273         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5274             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5275                 return -EOPNOTSUPP;
5276
5277         switch (info->genlhdr->cmd) {
5278         case NL80211_CMD_SET_PMKSA:
5279                 rdev_ops = rdev->ops->set_pmksa;
5280                 break;
5281         case NL80211_CMD_DEL_PMKSA:
5282                 rdev_ops = rdev->ops->del_pmksa;
5283                 break;
5284         default:
5285                 WARN_ON(1);
5286                 break;
5287         }
5288
5289         if (!rdev_ops)
5290                 return -EOPNOTSUPP;
5291
5292         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5293 }
5294
5295 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5296 {
5297         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5298         struct net_device *dev = info->user_ptr[1];
5299
5300         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5301             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5302                 return -EOPNOTSUPP;
5303
5304         if (!rdev->ops->flush_pmksa)
5305                 return -EOPNOTSUPP;
5306
5307         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5308 }
5309
5310 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5311 {
5312         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5313         struct net_device *dev = info->user_ptr[1];
5314         u8 action_code, dialog_token;
5315         u16 status_code;
5316         u8 *peer;
5317
5318         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5319             !rdev->ops->tdls_mgmt)
5320                 return -EOPNOTSUPP;
5321
5322         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5323             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5324             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5325             !info->attrs[NL80211_ATTR_IE] ||
5326             !info->attrs[NL80211_ATTR_MAC])
5327                 return -EINVAL;
5328
5329         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5330         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5331         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5332         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5333
5334         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5335                                     dialog_token, status_code,
5336                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5337                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5338 }
5339
5340 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5341 {
5342         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5343         struct net_device *dev = info->user_ptr[1];
5344         enum nl80211_tdls_operation operation;
5345         u8 *peer;
5346
5347         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5348             !rdev->ops->tdls_oper)
5349                 return -EOPNOTSUPP;
5350
5351         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5352             !info->attrs[NL80211_ATTR_MAC])
5353                 return -EINVAL;
5354
5355         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5356         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5357
5358         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5359 }
5360
5361 static int nl80211_remain_on_channel(struct sk_buff *skb,
5362                                      struct genl_info *info)
5363 {
5364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5365         struct net_device *dev = info->user_ptr[1];
5366         struct ieee80211_channel *chan;
5367         struct sk_buff *msg;
5368         void *hdr;
5369         u64 cookie;
5370         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5371         u32 freq, duration;
5372         int err;
5373
5374         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5375             !info->attrs[NL80211_ATTR_DURATION])
5376                 return -EINVAL;
5377
5378         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5379
5380         /*
5381          * We should be on that channel for at least one jiffie,
5382          * and more than 5 seconds seems excessive.
5383          */
5384         if (!duration || !msecs_to_jiffies(duration) ||
5385             duration > rdev->wiphy.max_remain_on_channel_duration)
5386                 return -EINVAL;
5387
5388         if (!rdev->ops->remain_on_channel ||
5389             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5390                 return -EOPNOTSUPP;
5391
5392         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5393                 channel_type = nla_get_u32(
5394                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5395                 if (channel_type != NL80211_CHAN_NO_HT &&
5396                     channel_type != NL80211_CHAN_HT20 &&
5397                     channel_type != NL80211_CHAN_HT40PLUS &&
5398                     channel_type != NL80211_CHAN_HT40MINUS)
5399                         return -EINVAL;
5400         }
5401
5402         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5403         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5404         if (chan == NULL)
5405                 return -EINVAL;
5406
5407         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5408         if (!msg)
5409                 return -ENOMEM;
5410
5411         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5412                              NL80211_CMD_REMAIN_ON_CHANNEL);
5413
5414         if (IS_ERR(hdr)) {
5415                 err = PTR_ERR(hdr);
5416                 goto free_msg;
5417         }
5418
5419         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5420                                            channel_type, duration, &cookie);
5421
5422         if (err)
5423                 goto free_msg;
5424
5425         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5426
5427         genlmsg_end(msg, hdr);
5428
5429         return genlmsg_reply(msg, info);
5430
5431  nla_put_failure:
5432         err = -ENOBUFS;
5433  free_msg:
5434         nlmsg_free(msg);
5435         return err;
5436 }
5437
5438 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5439                                             struct genl_info *info)
5440 {
5441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5442         struct net_device *dev = info->user_ptr[1];
5443         u64 cookie;
5444
5445         if (!info->attrs[NL80211_ATTR_COOKIE])
5446                 return -EINVAL;
5447
5448         if (!rdev->ops->cancel_remain_on_channel)
5449                 return -EOPNOTSUPP;
5450
5451         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5452
5453         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5454 }
5455
5456 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5457                            u8 *rates, u8 rates_len)
5458 {
5459         u8 i;
5460         u32 mask = 0;
5461
5462         for (i = 0; i < rates_len; i++) {
5463                 int rate = (rates[i] & 0x7f) * 5;
5464                 int ridx;
5465                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5466                         struct ieee80211_rate *srate =
5467                                 &sband->bitrates[ridx];
5468                         if (rate == srate->bitrate) {
5469                                 mask |= 1 << ridx;
5470                                 break;
5471                         }
5472                 }
5473                 if (ridx == sband->n_bitrates)
5474                         return 0; /* rate not found */
5475         }
5476
5477         return mask;
5478 }
5479
5480 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5481                                u8 *rates, u8 rates_len,
5482                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5483 {
5484         u8 i;
5485
5486         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5487
5488         for (i = 0; i < rates_len; i++) {
5489                 int ridx, rbit;
5490
5491                 ridx = rates[i] / 8;
5492                 rbit = BIT(rates[i] % 8);
5493
5494                 /* check validity */
5495                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5496                         return false;
5497
5498                 /* check availability */
5499                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5500                         mcs[ridx] |= rbit;
5501                 else
5502                         return false;
5503         }
5504
5505         return true;
5506 }
5507
5508 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5509         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5510                                     .len = NL80211_MAX_SUPP_RATES },
5511         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5512                                  .len = NL80211_MAX_SUPP_HT_RATES },
5513 };
5514
5515 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5516                                        struct genl_info *info)
5517 {
5518         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5519         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5520         struct cfg80211_bitrate_mask mask;
5521         int rem, i;
5522         struct net_device *dev = info->user_ptr[1];
5523         struct nlattr *tx_rates;
5524         struct ieee80211_supported_band *sband;
5525
5526         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5527                 return -EINVAL;
5528
5529         if (!rdev->ops->set_bitrate_mask)
5530                 return -EOPNOTSUPP;
5531
5532         memset(&mask, 0, sizeof(mask));
5533         /* Default to all rates enabled */
5534         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5535                 sband = rdev->wiphy.bands[i];
5536                 mask.control[i].legacy =
5537                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5538                 if (sband)
5539                         memcpy(mask.control[i].mcs,
5540                                sband->ht_cap.mcs.rx_mask,
5541                                sizeof(mask.control[i].mcs));
5542                 else
5543                         memset(mask.control[i].mcs, 0,
5544                                sizeof(mask.control[i].mcs));
5545         }
5546
5547         /*
5548          * The nested attribute uses enum nl80211_band as the index. This maps
5549          * directly to the enum ieee80211_band values used in cfg80211.
5550          */
5551         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5552         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5553         {
5554                 enum ieee80211_band band = nla_type(tx_rates);
5555                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5556                         return -EINVAL;
5557                 sband = rdev->wiphy.bands[band];
5558                 if (sband == NULL)
5559                         return -EINVAL;
5560                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5561                           nla_len(tx_rates), nl80211_txattr_policy);
5562                 if (tb[NL80211_TXRATE_LEGACY]) {
5563                         mask.control[band].legacy = rateset_to_mask(
5564                                 sband,
5565                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5566                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5567                 }
5568                 if (tb[NL80211_TXRATE_MCS]) {
5569                         if (!ht_rateset_to_mask(
5570                                         sband,
5571                                         nla_data(tb[NL80211_TXRATE_MCS]),
5572                                         nla_len(tb[NL80211_TXRATE_MCS]),
5573                                         mask.control[band].mcs))
5574                                 return -EINVAL;
5575                 }
5576
5577                 if (mask.control[band].legacy == 0) {
5578                         /* don't allow empty legacy rates if HT
5579                          * is not even supported. */
5580                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5581                                 return -EINVAL;
5582
5583                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5584                                 if (mask.control[band].mcs[i])
5585                                         break;
5586
5587                         /* legacy and mcs rates may not be both empty */
5588                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5589                                 return -EINVAL;
5590                 }
5591         }
5592
5593         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5594 }
5595
5596 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5597 {
5598         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5599         struct net_device *dev = info->user_ptr[1];
5600         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5601
5602         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5603                 return -EINVAL;
5604
5605         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5606                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5607
5608         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5609             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5610             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5611             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5612             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5613             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5614             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5615                 return -EOPNOTSUPP;
5616
5617         /* not much point in registering if we can't reply */
5618         if (!rdev->ops->mgmt_tx)
5619                 return -EOPNOTSUPP;
5620
5621         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5622                         frame_type,
5623                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5624                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5625 }
5626
5627 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5628 {
5629         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5630         struct net_device *dev = info->user_ptr[1];
5631         struct ieee80211_channel *chan;
5632         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5633         bool channel_type_valid = false;
5634         u32 freq;
5635         int err;
5636         void *hdr = NULL;
5637         u64 cookie;
5638         struct sk_buff *msg = NULL;
5639         unsigned int wait = 0;
5640         bool offchan, no_cck, dont_wait_for_ack;
5641
5642         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5643
5644         if (!info->attrs[NL80211_ATTR_FRAME] ||
5645             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5646                 return -EINVAL;
5647
5648         if (!rdev->ops->mgmt_tx)
5649                 return -EOPNOTSUPP;
5650
5651         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5652             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5653             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5654             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5655             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5656             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5657             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5658                 return -EOPNOTSUPP;
5659
5660         if (info->attrs[NL80211_ATTR_DURATION]) {
5661                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5662                         return -EINVAL;
5663                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5664         }
5665
5666         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5667                 channel_type = nla_get_u32(
5668                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5669                 if (channel_type != NL80211_CHAN_NO_HT &&
5670                     channel_type != NL80211_CHAN_HT20 &&
5671                     channel_type != NL80211_CHAN_HT40PLUS &&
5672                     channel_type != NL80211_CHAN_HT40MINUS)
5673                         return -EINVAL;
5674                 channel_type_valid = true;
5675         }
5676
5677         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5678
5679         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5680                 return -EINVAL;
5681
5682         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5683
5684         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5685         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5686         if (chan == NULL)
5687                 return -EINVAL;
5688
5689         if (!dont_wait_for_ack) {
5690                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5691                 if (!msg)
5692                         return -ENOMEM;
5693
5694                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5695                                      NL80211_CMD_FRAME);
5696
5697                 if (IS_ERR(hdr)) {
5698                         err = PTR_ERR(hdr);
5699                         goto free_msg;
5700                 }
5701         }
5702
5703         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5704                                     channel_type_valid, wait,
5705                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5706                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5707                                     no_cck, dont_wait_for_ack, &cookie);
5708         if (err)
5709                 goto free_msg;
5710
5711         if (msg) {
5712                 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5713
5714                 genlmsg_end(msg, hdr);
5715                 return genlmsg_reply(msg, info);
5716         }
5717
5718         return 0;
5719
5720  nla_put_failure:
5721         err = -ENOBUFS;
5722  free_msg:
5723         nlmsg_free(msg);
5724         return err;
5725 }
5726
5727 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5728 {
5729         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5730         struct net_device *dev = info->user_ptr[1];
5731         u64 cookie;
5732
5733         if (!info->attrs[NL80211_ATTR_COOKIE])
5734                 return -EINVAL;
5735
5736         if (!rdev->ops->mgmt_tx_cancel_wait)
5737                 return -EOPNOTSUPP;
5738
5739         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5740             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5741             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5742             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5743             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5744             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5745                 return -EOPNOTSUPP;
5746
5747         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5748
5749         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5750 }
5751
5752 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5753 {
5754         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5755         struct wireless_dev *wdev;
5756         struct net_device *dev = info->user_ptr[1];
5757         u8 ps_state;
5758         bool state;
5759         int err;
5760
5761         if (!info->attrs[NL80211_ATTR_PS_STATE])
5762                 return -EINVAL;
5763
5764         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5765
5766         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5767                 return -EINVAL;
5768
5769         wdev = dev->ieee80211_ptr;
5770
5771         if (!rdev->ops->set_power_mgmt)
5772                 return -EOPNOTSUPP;
5773
5774         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5775
5776         if (state == wdev->ps)
5777                 return 0;
5778
5779         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5780                                         wdev->ps_timeout);
5781         if (!err)
5782                 wdev->ps = state;
5783         return err;
5784 }
5785
5786 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5787 {
5788         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5789         enum nl80211_ps_state ps_state;
5790         struct wireless_dev *wdev;
5791         struct net_device *dev = info->user_ptr[1];
5792         struct sk_buff *msg;
5793         void *hdr;
5794         int err;
5795
5796         wdev = dev->ieee80211_ptr;
5797
5798         if (!rdev->ops->set_power_mgmt)
5799                 return -EOPNOTSUPP;
5800
5801         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5802         if (!msg)
5803                 return -ENOMEM;
5804
5805         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5806                              NL80211_CMD_GET_POWER_SAVE);
5807         if (!hdr) {
5808                 err = -ENOBUFS;
5809                 goto free_msg;
5810         }
5811
5812         if (wdev->ps)
5813                 ps_state = NL80211_PS_ENABLED;
5814         else
5815                 ps_state = NL80211_PS_DISABLED;
5816
5817         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5818
5819         genlmsg_end(msg, hdr);
5820         return genlmsg_reply(msg, info);
5821
5822  nla_put_failure:
5823         err = -ENOBUFS;
5824  free_msg:
5825         nlmsg_free(msg);
5826         return err;
5827 }
5828
5829 static struct nla_policy
5830 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5831         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5832         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5833         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5834 };
5835
5836 static int nl80211_set_cqm_rssi(struct genl_info *info,
5837                                 s32 threshold, u32 hysteresis)
5838 {
5839         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5840         struct wireless_dev *wdev;
5841         struct net_device *dev = info->user_ptr[1];
5842
5843         if (threshold > 0)
5844                 return -EINVAL;
5845
5846         wdev = dev->ieee80211_ptr;
5847
5848         if (!rdev->ops->set_cqm_rssi_config)
5849                 return -EOPNOTSUPP;
5850
5851         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5852             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5853                 return -EOPNOTSUPP;
5854
5855         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5856                                               threshold, hysteresis);
5857 }
5858
5859 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5860 {
5861         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5862         struct nlattr *cqm;
5863         int err;
5864
5865         cqm = info->attrs[NL80211_ATTR_CQM];
5866         if (!cqm) {
5867                 err = -EINVAL;
5868                 goto out;
5869         }
5870
5871         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5872                                nl80211_attr_cqm_policy);
5873         if (err)
5874                 goto out;
5875
5876         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5877             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5878                 s32 threshold;
5879                 u32 hysteresis;
5880                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5881                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5882                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5883         } else
5884                 err = -EINVAL;
5885
5886 out:
5887         return err;
5888 }
5889
5890 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5891 {
5892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5893         struct net_device *dev = info->user_ptr[1];
5894         struct mesh_config cfg;
5895         struct mesh_setup setup;
5896         int err;
5897
5898         /* start with default */
5899         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5900         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5901
5902         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5903                 /* and parse parameters if given */
5904                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5905                 if (err)
5906                         return err;
5907         }
5908
5909         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5910             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5911                 return -EINVAL;
5912
5913         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5914         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5915
5916         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5917             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
5918                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5919                         return -EINVAL;
5920
5921         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5922                 /* parse additional setup parameters if given */
5923                 err = nl80211_parse_mesh_setup(info, &setup);
5924                 if (err)
5925                         return err;
5926         }
5927
5928         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5929 }
5930
5931 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5932 {
5933         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5934         struct net_device *dev = info->user_ptr[1];
5935
5936         return cfg80211_leave_mesh(rdev, dev);
5937 }
5938
5939 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5940 {
5941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5942         struct sk_buff *msg;
5943         void *hdr;
5944
5945         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5946                 return -EOPNOTSUPP;
5947
5948         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5949         if (!msg)
5950                 return -ENOMEM;
5951
5952         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5953                              NL80211_CMD_GET_WOWLAN);
5954         if (!hdr)
5955                 goto nla_put_failure;
5956
5957         if (rdev->wowlan) {
5958                 struct nlattr *nl_wowlan;
5959
5960                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5961                 if (!nl_wowlan)
5962                         goto nla_put_failure;
5963
5964                 if (rdev->wowlan->any)
5965                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5966                 if (rdev->wowlan->disconnect)
5967                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5968                 if (rdev->wowlan->magic_pkt)
5969                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5970                 if (rdev->wowlan->gtk_rekey_failure)
5971                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5972                 if (rdev->wowlan->eap_identity_req)
5973                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
5974                 if (rdev->wowlan->four_way_handshake)
5975                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
5976                 if (rdev->wowlan->rfkill_release)
5977                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
5978                 if (rdev->wowlan->n_patterns) {
5979                         struct nlattr *nl_pats, *nl_pat;
5980                         int i, pat_len;
5981
5982                         nl_pats = nla_nest_start(msg,
5983                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5984                         if (!nl_pats)
5985                                 goto nla_put_failure;
5986
5987                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5988                                 nl_pat = nla_nest_start(msg, i + 1);
5989                                 if (!nl_pat)
5990                                         goto nla_put_failure;
5991                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5992                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5993                                         DIV_ROUND_UP(pat_len, 8),
5994                                         rdev->wowlan->patterns[i].mask);
5995                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5996                                         pat_len,
5997                                         rdev->wowlan->patterns[i].pattern);
5998                                 nla_nest_end(msg, nl_pat);
5999                         }
6000                         nla_nest_end(msg, nl_pats);
6001                 }
6002
6003                 nla_nest_end(msg, nl_wowlan);
6004         }
6005
6006         genlmsg_end(msg, hdr);
6007         return genlmsg_reply(msg, info);
6008
6009 nla_put_failure:
6010         nlmsg_free(msg);
6011         return -ENOBUFS;
6012 }
6013
6014 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6015 {
6016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6017         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6018         struct cfg80211_wowlan no_triggers = {};
6019         struct cfg80211_wowlan new_triggers = {};
6020         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6021         int err, i;
6022         bool prev_enabled = rdev->wowlan;
6023
6024         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6025                 return -EOPNOTSUPP;
6026
6027         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6028                 goto no_triggers;
6029
6030         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6031                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6032                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6033                         nl80211_wowlan_policy);
6034         if (err)
6035                 return err;
6036
6037         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6038                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6039                         return -EINVAL;
6040                 new_triggers.any = true;
6041         }
6042
6043         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6044                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6045                         return -EINVAL;
6046                 new_triggers.disconnect = true;
6047         }
6048
6049         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6050                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6051                         return -EINVAL;
6052                 new_triggers.magic_pkt = true;
6053         }
6054
6055         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6056                 return -EINVAL;
6057
6058         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6059                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6060                         return -EINVAL;
6061                 new_triggers.gtk_rekey_failure = true;
6062         }
6063
6064         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6065                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6066                         return -EINVAL;
6067                 new_triggers.eap_identity_req = true;
6068         }
6069
6070         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6071                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6072                         return -EINVAL;
6073                 new_triggers.four_way_handshake = true;
6074         }
6075
6076         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6077                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6078                         return -EINVAL;
6079                 new_triggers.rfkill_release = true;
6080         }
6081
6082         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6083                 struct nlattr *pat;
6084                 int n_patterns = 0;
6085                 int rem, pat_len, mask_len;
6086                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6087
6088                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6089                                     rem)
6090                         n_patterns++;
6091                 if (n_patterns > wowlan->n_patterns)
6092                         return -EINVAL;
6093
6094                 new_triggers.patterns = kcalloc(n_patterns,
6095                                                 sizeof(new_triggers.patterns[0]),
6096                                                 GFP_KERNEL);
6097                 if (!new_triggers.patterns)
6098                         return -ENOMEM;
6099
6100                 new_triggers.n_patterns = n_patterns;
6101                 i = 0;
6102
6103                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6104                                     rem) {
6105                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6106                                   nla_data(pat), nla_len(pat), NULL);
6107                         err = -EINVAL;
6108                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6109                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6110                                 goto error;
6111                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6112                         mask_len = DIV_ROUND_UP(pat_len, 8);
6113                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6114                             mask_len)
6115                                 goto error;
6116                         if (pat_len > wowlan->pattern_max_len ||
6117                             pat_len < wowlan->pattern_min_len)
6118                                 goto error;
6119
6120                         new_triggers.patterns[i].mask =
6121                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6122                         if (!new_triggers.patterns[i].mask) {
6123                                 err = -ENOMEM;
6124                                 goto error;
6125                         }
6126                         new_triggers.patterns[i].pattern =
6127                                 new_triggers.patterns[i].mask + mask_len;
6128                         memcpy(new_triggers.patterns[i].mask,
6129                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6130                                mask_len);
6131                         new_triggers.patterns[i].pattern_len = pat_len;
6132                         memcpy(new_triggers.patterns[i].pattern,
6133                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6134                                pat_len);
6135                         i++;
6136                 }
6137         }
6138
6139         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6140                 struct cfg80211_wowlan *ntrig;
6141                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6142                                 GFP_KERNEL);
6143                 if (!ntrig) {
6144                         err = -ENOMEM;
6145                         goto error;
6146                 }
6147                 cfg80211_rdev_free_wowlan(rdev);
6148                 rdev->wowlan = ntrig;
6149         } else {
6150  no_triggers:
6151                 cfg80211_rdev_free_wowlan(rdev);
6152                 rdev->wowlan = NULL;
6153         }
6154
6155         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6156                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6157
6158         return 0;
6159  error:
6160         for (i = 0; i < new_triggers.n_patterns; i++)
6161                 kfree(new_triggers.patterns[i].mask);
6162         kfree(new_triggers.patterns);
6163         return err;
6164 }
6165
6166 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6167 {
6168         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6169         struct net_device *dev = info->user_ptr[1];
6170         struct wireless_dev *wdev = dev->ieee80211_ptr;
6171         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6172         struct cfg80211_gtk_rekey_data rekey_data;
6173         int err;
6174
6175         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6176                 return -EINVAL;
6177
6178         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6179                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6180                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6181                         nl80211_rekey_policy);
6182         if (err)
6183                 return err;
6184
6185         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6186                 return -ERANGE;
6187         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6188                 return -ERANGE;
6189         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6190                 return -ERANGE;
6191
6192         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6193                NL80211_KEK_LEN);
6194         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6195                NL80211_KCK_LEN);
6196         memcpy(rekey_data.replay_ctr,
6197                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6198                NL80211_REPLAY_CTR_LEN);
6199
6200         wdev_lock(wdev);
6201         if (!wdev->current_bss) {
6202                 err = -ENOTCONN;
6203                 goto out;
6204         }
6205
6206         if (!rdev->ops->set_rekey_data) {
6207                 err = -EOPNOTSUPP;
6208                 goto out;
6209         }
6210
6211         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6212  out:
6213         wdev_unlock(wdev);
6214         return err;
6215 }
6216
6217 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6218                                              struct genl_info *info)
6219 {
6220         struct net_device *dev = info->user_ptr[1];
6221         struct wireless_dev *wdev = dev->ieee80211_ptr;
6222
6223         if (wdev->iftype != NL80211_IFTYPE_AP &&
6224             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6225                 return -EINVAL;
6226
6227         if (wdev->ap_unexpected_nlpid)
6228                 return -EBUSY;
6229
6230         wdev->ap_unexpected_nlpid = info->snd_pid;
6231         return 0;
6232 }
6233
6234 static int nl80211_probe_client(struct sk_buff *skb,
6235                                 struct genl_info *info)
6236 {
6237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6238         struct net_device *dev = info->user_ptr[1];
6239         struct wireless_dev *wdev = dev->ieee80211_ptr;
6240         struct sk_buff *msg;
6241         void *hdr;
6242         const u8 *addr;
6243         u64 cookie;
6244         int err;
6245
6246         if (wdev->iftype != NL80211_IFTYPE_AP &&
6247             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6248                 return -EOPNOTSUPP;
6249
6250         if (!info->attrs[NL80211_ATTR_MAC])
6251                 return -EINVAL;
6252
6253         if (!rdev->ops->probe_client)
6254                 return -EOPNOTSUPP;
6255
6256         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6257         if (!msg)
6258                 return -ENOMEM;
6259
6260         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6261                              NL80211_CMD_PROBE_CLIENT);
6262
6263         if (IS_ERR(hdr)) {
6264                 err = PTR_ERR(hdr);
6265                 goto free_msg;
6266         }
6267
6268         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6269
6270         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6271         if (err)
6272                 goto free_msg;
6273
6274         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6275
6276         genlmsg_end(msg, hdr);
6277
6278         return genlmsg_reply(msg, info);
6279
6280  nla_put_failure:
6281         err = -ENOBUFS;
6282  free_msg:
6283         nlmsg_free(msg);
6284         return err;
6285 }
6286
6287 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6288 {
6289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6290
6291         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6292                 return -EOPNOTSUPP;
6293
6294         if (rdev->ap_beacons_nlpid)
6295                 return -EBUSY;
6296
6297         rdev->ap_beacons_nlpid = info->snd_pid;
6298
6299         return 0;
6300 }
6301
6302 #define NL80211_FLAG_NEED_WIPHY         0x01
6303 #define NL80211_FLAG_NEED_NETDEV        0x02
6304 #define NL80211_FLAG_NEED_RTNL          0x04
6305 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6306 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6307                                          NL80211_FLAG_CHECK_NETDEV_UP)
6308
6309 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6310                             struct genl_info *info)
6311 {
6312         struct cfg80211_registered_device *rdev;
6313         struct net_device *dev;
6314         int err;
6315         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6316
6317         if (rtnl)
6318                 rtnl_lock();
6319
6320         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6321                 rdev = cfg80211_get_dev_from_info(info);
6322                 if (IS_ERR(rdev)) {
6323                         if (rtnl)
6324                                 rtnl_unlock();
6325                         return PTR_ERR(rdev);
6326                 }
6327                 info->user_ptr[0] = rdev;
6328         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6329                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6330                                               &rdev, &dev);
6331                 if (err) {
6332                         if (rtnl)
6333                                 rtnl_unlock();
6334                         return err;
6335                 }
6336                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6337                     !netif_running(dev)) {
6338                         cfg80211_unlock_rdev(rdev);
6339                         dev_put(dev);
6340                         if (rtnl)
6341                                 rtnl_unlock();
6342                         return -ENETDOWN;
6343                 }
6344                 info->user_ptr[0] = rdev;
6345                 info->user_ptr[1] = dev;
6346         }
6347
6348         return 0;
6349 }
6350
6351 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6352                               struct genl_info *info)
6353 {
6354         if (info->user_ptr[0])
6355                 cfg80211_unlock_rdev(info->user_ptr[0]);
6356         if (info->user_ptr[1])
6357                 dev_put(info->user_ptr[1]);
6358         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6359                 rtnl_unlock();
6360 }
6361
6362 static struct genl_ops nl80211_ops[] = {
6363         {
6364                 .cmd = NL80211_CMD_GET_WIPHY,
6365                 .doit = nl80211_get_wiphy,
6366                 .dumpit = nl80211_dump_wiphy,
6367                 .policy = nl80211_policy,
6368                 /* can be retrieved by unprivileged users */
6369                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6370         },
6371         {
6372                 .cmd = NL80211_CMD_SET_WIPHY,
6373                 .doit = nl80211_set_wiphy,
6374                 .policy = nl80211_policy,
6375                 .flags = GENL_ADMIN_PERM,
6376                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6377         },
6378         {
6379                 .cmd = NL80211_CMD_GET_INTERFACE,
6380                 .doit = nl80211_get_interface,
6381                 .dumpit = nl80211_dump_interface,
6382                 .policy = nl80211_policy,
6383                 /* can be retrieved by unprivileged users */
6384                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6385         },
6386         {
6387                 .cmd = NL80211_CMD_SET_INTERFACE,
6388                 .doit = nl80211_set_interface,
6389                 .policy = nl80211_policy,
6390                 .flags = GENL_ADMIN_PERM,
6391                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6392                                   NL80211_FLAG_NEED_RTNL,
6393         },
6394         {
6395                 .cmd = NL80211_CMD_NEW_INTERFACE,
6396                 .doit = nl80211_new_interface,
6397                 .policy = nl80211_policy,
6398                 .flags = GENL_ADMIN_PERM,
6399                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6400                                   NL80211_FLAG_NEED_RTNL,
6401         },
6402         {
6403                 .cmd = NL80211_CMD_DEL_INTERFACE,
6404                 .doit = nl80211_del_interface,
6405                 .policy = nl80211_policy,
6406                 .flags = GENL_ADMIN_PERM,
6407                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6408                                   NL80211_FLAG_NEED_RTNL,
6409         },
6410         {
6411                 .cmd = NL80211_CMD_GET_KEY,
6412                 .doit = nl80211_get_key,
6413                 .policy = nl80211_policy,
6414                 .flags = GENL_ADMIN_PERM,
6415                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6416                                   NL80211_FLAG_NEED_RTNL,
6417         },
6418         {
6419                 .cmd = NL80211_CMD_SET_KEY,
6420                 .doit = nl80211_set_key,
6421                 .policy = nl80211_policy,
6422                 .flags = GENL_ADMIN_PERM,
6423                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6424                                   NL80211_FLAG_NEED_RTNL,
6425         },
6426         {
6427                 .cmd = NL80211_CMD_NEW_KEY,
6428                 .doit = nl80211_new_key,
6429                 .policy = nl80211_policy,
6430                 .flags = GENL_ADMIN_PERM,
6431                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6432                                   NL80211_FLAG_NEED_RTNL,
6433         },
6434         {
6435                 .cmd = NL80211_CMD_DEL_KEY,
6436                 .doit = nl80211_del_key,
6437                 .policy = nl80211_policy,
6438                 .flags = GENL_ADMIN_PERM,
6439                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6440                                   NL80211_FLAG_NEED_RTNL,
6441         },
6442         {
6443                 .cmd = NL80211_CMD_SET_BEACON,
6444                 .policy = nl80211_policy,
6445                 .flags = GENL_ADMIN_PERM,
6446                 .doit = nl80211_set_beacon,
6447                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6448                                   NL80211_FLAG_NEED_RTNL,
6449         },
6450         {
6451                 .cmd = NL80211_CMD_START_AP,
6452                 .policy = nl80211_policy,
6453                 .flags = GENL_ADMIN_PERM,
6454                 .doit = nl80211_start_ap,
6455                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6456                                   NL80211_FLAG_NEED_RTNL,
6457         },
6458         {
6459                 .cmd = NL80211_CMD_STOP_AP,
6460                 .policy = nl80211_policy,
6461                 .flags = GENL_ADMIN_PERM,
6462                 .doit = nl80211_stop_ap,
6463                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6464                                   NL80211_FLAG_NEED_RTNL,
6465         },
6466         {
6467                 .cmd = NL80211_CMD_GET_STATION,
6468                 .doit = nl80211_get_station,
6469                 .dumpit = nl80211_dump_station,
6470                 .policy = nl80211_policy,
6471                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6472                                   NL80211_FLAG_NEED_RTNL,
6473         },
6474         {
6475                 .cmd = NL80211_CMD_SET_STATION,
6476                 .doit = nl80211_set_station,
6477                 .policy = nl80211_policy,
6478                 .flags = GENL_ADMIN_PERM,
6479                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6480                                   NL80211_FLAG_NEED_RTNL,
6481         },
6482         {
6483                 .cmd = NL80211_CMD_NEW_STATION,
6484                 .doit = nl80211_new_station,
6485                 .policy = nl80211_policy,
6486                 .flags = GENL_ADMIN_PERM,
6487                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6488                                   NL80211_FLAG_NEED_RTNL,
6489         },
6490         {
6491                 .cmd = NL80211_CMD_DEL_STATION,
6492                 .doit = nl80211_del_station,
6493                 .policy = nl80211_policy,
6494                 .flags = GENL_ADMIN_PERM,
6495                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6496                                   NL80211_FLAG_NEED_RTNL,
6497         },
6498         {
6499                 .cmd = NL80211_CMD_GET_MPATH,
6500                 .doit = nl80211_get_mpath,
6501                 .dumpit = nl80211_dump_mpath,
6502                 .policy = nl80211_policy,
6503                 .flags = GENL_ADMIN_PERM,
6504                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6505                                   NL80211_FLAG_NEED_RTNL,
6506         },
6507         {
6508                 .cmd = NL80211_CMD_SET_MPATH,
6509                 .doit = nl80211_set_mpath,
6510                 .policy = nl80211_policy,
6511                 .flags = GENL_ADMIN_PERM,
6512                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6513                                   NL80211_FLAG_NEED_RTNL,
6514         },
6515         {
6516                 .cmd = NL80211_CMD_NEW_MPATH,
6517                 .doit = nl80211_new_mpath,
6518                 .policy = nl80211_policy,
6519                 .flags = GENL_ADMIN_PERM,
6520                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6521                                   NL80211_FLAG_NEED_RTNL,
6522         },
6523         {
6524                 .cmd = NL80211_CMD_DEL_MPATH,
6525                 .doit = nl80211_del_mpath,
6526                 .policy = nl80211_policy,
6527                 .flags = GENL_ADMIN_PERM,
6528                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6529                                   NL80211_FLAG_NEED_RTNL,
6530         },
6531         {
6532                 .cmd = NL80211_CMD_SET_BSS,
6533                 .doit = nl80211_set_bss,
6534                 .policy = nl80211_policy,
6535                 .flags = GENL_ADMIN_PERM,
6536                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6537                                   NL80211_FLAG_NEED_RTNL,
6538         },
6539         {
6540                 .cmd = NL80211_CMD_GET_REG,
6541                 .doit = nl80211_get_reg,
6542                 .policy = nl80211_policy,
6543                 /* can be retrieved by unprivileged users */
6544         },
6545         {
6546                 .cmd = NL80211_CMD_SET_REG,
6547                 .doit = nl80211_set_reg,
6548                 .policy = nl80211_policy,
6549                 .flags = GENL_ADMIN_PERM,
6550         },
6551         {
6552                 .cmd = NL80211_CMD_REQ_SET_REG,
6553                 .doit = nl80211_req_set_reg,
6554                 .policy = nl80211_policy,
6555                 .flags = GENL_ADMIN_PERM,
6556         },
6557         {
6558                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6559                 .doit = nl80211_get_mesh_config,
6560                 .policy = nl80211_policy,
6561                 /* can be retrieved by unprivileged users */
6562                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6563                                   NL80211_FLAG_NEED_RTNL,
6564         },
6565         {
6566                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6567                 .doit = nl80211_update_mesh_config,
6568                 .policy = nl80211_policy,
6569                 .flags = GENL_ADMIN_PERM,
6570                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6571                                   NL80211_FLAG_NEED_RTNL,
6572         },
6573         {
6574                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6575                 .doit = nl80211_trigger_scan,
6576                 .policy = nl80211_policy,
6577                 .flags = GENL_ADMIN_PERM,
6578                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6579                                   NL80211_FLAG_NEED_RTNL,
6580         },
6581         {
6582                 .cmd = NL80211_CMD_GET_SCAN,
6583                 .policy = nl80211_policy,
6584                 .dumpit = nl80211_dump_scan,
6585         },
6586         {
6587                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6588                 .doit = nl80211_start_sched_scan,
6589                 .policy = nl80211_policy,
6590                 .flags = GENL_ADMIN_PERM,
6591                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6592                                   NL80211_FLAG_NEED_RTNL,
6593         },
6594         {
6595                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6596                 .doit = nl80211_stop_sched_scan,
6597                 .policy = nl80211_policy,
6598                 .flags = GENL_ADMIN_PERM,
6599                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6600                                   NL80211_FLAG_NEED_RTNL,
6601         },
6602         {
6603                 .cmd = NL80211_CMD_AUTHENTICATE,
6604                 .doit = nl80211_authenticate,
6605                 .policy = nl80211_policy,
6606                 .flags = GENL_ADMIN_PERM,
6607                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6608                                   NL80211_FLAG_NEED_RTNL,
6609         },
6610         {
6611                 .cmd = NL80211_CMD_ASSOCIATE,
6612                 .doit = nl80211_associate,
6613                 .policy = nl80211_policy,
6614                 .flags = GENL_ADMIN_PERM,
6615                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6616                                   NL80211_FLAG_NEED_RTNL,
6617         },
6618         {
6619                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6620                 .doit = nl80211_deauthenticate,
6621                 .policy = nl80211_policy,
6622                 .flags = GENL_ADMIN_PERM,
6623                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6624                                   NL80211_FLAG_NEED_RTNL,
6625         },
6626         {
6627                 .cmd = NL80211_CMD_DISASSOCIATE,
6628                 .doit = nl80211_disassociate,
6629                 .policy = nl80211_policy,
6630                 .flags = GENL_ADMIN_PERM,
6631                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6632                                   NL80211_FLAG_NEED_RTNL,
6633         },
6634         {
6635                 .cmd = NL80211_CMD_JOIN_IBSS,
6636                 .doit = nl80211_join_ibss,
6637                 .policy = nl80211_policy,
6638                 .flags = GENL_ADMIN_PERM,
6639                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6640                                   NL80211_FLAG_NEED_RTNL,
6641         },
6642         {
6643                 .cmd = NL80211_CMD_LEAVE_IBSS,
6644                 .doit = nl80211_leave_ibss,
6645                 .policy = nl80211_policy,
6646                 .flags = GENL_ADMIN_PERM,
6647                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6648                                   NL80211_FLAG_NEED_RTNL,
6649         },
6650 #ifdef CONFIG_NL80211_TESTMODE
6651         {
6652                 .cmd = NL80211_CMD_TESTMODE,
6653                 .doit = nl80211_testmode_do,
6654                 .dumpit = nl80211_testmode_dump,
6655                 .policy = nl80211_policy,
6656                 .flags = GENL_ADMIN_PERM,
6657                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6658                                   NL80211_FLAG_NEED_RTNL,
6659         },
6660 #endif
6661         {
6662                 .cmd = NL80211_CMD_CONNECT,
6663                 .doit = nl80211_connect,
6664                 .policy = nl80211_policy,
6665                 .flags = GENL_ADMIN_PERM,
6666                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6667                                   NL80211_FLAG_NEED_RTNL,
6668         },
6669         {
6670                 .cmd = NL80211_CMD_DISCONNECT,
6671                 .doit = nl80211_disconnect,
6672                 .policy = nl80211_policy,
6673                 .flags = GENL_ADMIN_PERM,
6674                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6675                                   NL80211_FLAG_NEED_RTNL,
6676         },
6677         {
6678                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6679                 .doit = nl80211_wiphy_netns,
6680                 .policy = nl80211_policy,
6681                 .flags = GENL_ADMIN_PERM,
6682                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6683                                   NL80211_FLAG_NEED_RTNL,
6684         },
6685         {
6686                 .cmd = NL80211_CMD_GET_SURVEY,
6687                 .policy = nl80211_policy,
6688                 .dumpit = nl80211_dump_survey,
6689         },
6690         {
6691                 .cmd = NL80211_CMD_SET_PMKSA,
6692                 .doit = nl80211_setdel_pmksa,
6693                 .policy = nl80211_policy,
6694                 .flags = GENL_ADMIN_PERM,
6695                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6696                                   NL80211_FLAG_NEED_RTNL,
6697         },
6698         {
6699                 .cmd = NL80211_CMD_DEL_PMKSA,
6700                 .doit = nl80211_setdel_pmksa,
6701                 .policy = nl80211_policy,
6702                 .flags = GENL_ADMIN_PERM,
6703                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6704                                   NL80211_FLAG_NEED_RTNL,
6705         },
6706         {
6707                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6708                 .doit = nl80211_flush_pmksa,
6709                 .policy = nl80211_policy,
6710                 .flags = GENL_ADMIN_PERM,
6711                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6712                                   NL80211_FLAG_NEED_RTNL,
6713         },
6714         {
6715                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6716                 .doit = nl80211_remain_on_channel,
6717                 .policy = nl80211_policy,
6718                 .flags = GENL_ADMIN_PERM,
6719                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6720                                   NL80211_FLAG_NEED_RTNL,
6721         },
6722         {
6723                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6724                 .doit = nl80211_cancel_remain_on_channel,
6725                 .policy = nl80211_policy,
6726                 .flags = GENL_ADMIN_PERM,
6727                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6728                                   NL80211_FLAG_NEED_RTNL,
6729         },
6730         {
6731                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6732                 .doit = nl80211_set_tx_bitrate_mask,
6733                 .policy = nl80211_policy,
6734                 .flags = GENL_ADMIN_PERM,
6735                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6736                                   NL80211_FLAG_NEED_RTNL,
6737         },
6738         {
6739                 .cmd = NL80211_CMD_REGISTER_FRAME,
6740                 .doit = nl80211_register_mgmt,
6741                 .policy = nl80211_policy,
6742                 .flags = GENL_ADMIN_PERM,
6743                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6744                                   NL80211_FLAG_NEED_RTNL,
6745         },
6746         {
6747                 .cmd = NL80211_CMD_FRAME,
6748                 .doit = nl80211_tx_mgmt,
6749                 .policy = nl80211_policy,
6750                 .flags = GENL_ADMIN_PERM,
6751                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6752                                   NL80211_FLAG_NEED_RTNL,
6753         },
6754         {
6755                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6756                 .doit = nl80211_tx_mgmt_cancel_wait,
6757                 .policy = nl80211_policy,
6758                 .flags = GENL_ADMIN_PERM,
6759                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6760                                   NL80211_FLAG_NEED_RTNL,
6761         },
6762         {
6763                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6764                 .doit = nl80211_set_power_save,
6765                 .policy = nl80211_policy,
6766                 .flags = GENL_ADMIN_PERM,
6767                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6768                                   NL80211_FLAG_NEED_RTNL,
6769         },
6770         {
6771                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6772                 .doit = nl80211_get_power_save,
6773                 .policy = nl80211_policy,
6774                 /* can be retrieved by unprivileged users */
6775                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6776                                   NL80211_FLAG_NEED_RTNL,
6777         },
6778         {
6779                 .cmd = NL80211_CMD_SET_CQM,
6780                 .doit = nl80211_set_cqm,
6781                 .policy = nl80211_policy,
6782                 .flags = GENL_ADMIN_PERM,
6783                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6784                                   NL80211_FLAG_NEED_RTNL,
6785         },
6786         {
6787                 .cmd = NL80211_CMD_SET_CHANNEL,
6788                 .doit = nl80211_set_channel,
6789                 .policy = nl80211_policy,
6790                 .flags = GENL_ADMIN_PERM,
6791                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6792                                   NL80211_FLAG_NEED_RTNL,
6793         },
6794         {
6795                 .cmd = NL80211_CMD_SET_WDS_PEER,
6796                 .doit = nl80211_set_wds_peer,
6797                 .policy = nl80211_policy,
6798                 .flags = GENL_ADMIN_PERM,
6799                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6800                                   NL80211_FLAG_NEED_RTNL,
6801         },
6802         {
6803                 .cmd = NL80211_CMD_JOIN_MESH,
6804                 .doit = nl80211_join_mesh,
6805                 .policy = nl80211_policy,
6806                 .flags = GENL_ADMIN_PERM,
6807                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6808                                   NL80211_FLAG_NEED_RTNL,
6809         },
6810         {
6811                 .cmd = NL80211_CMD_LEAVE_MESH,
6812                 .doit = nl80211_leave_mesh,
6813                 .policy = nl80211_policy,
6814                 .flags = GENL_ADMIN_PERM,
6815                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6816                                   NL80211_FLAG_NEED_RTNL,
6817         },
6818         {
6819                 .cmd = NL80211_CMD_GET_WOWLAN,
6820                 .doit = nl80211_get_wowlan,
6821                 .policy = nl80211_policy,
6822                 /* can be retrieved by unprivileged users */
6823                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6824                                   NL80211_FLAG_NEED_RTNL,
6825         },
6826         {
6827                 .cmd = NL80211_CMD_SET_WOWLAN,
6828                 .doit = nl80211_set_wowlan,
6829                 .policy = nl80211_policy,
6830                 .flags = GENL_ADMIN_PERM,
6831                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6832                                   NL80211_FLAG_NEED_RTNL,
6833         },
6834         {
6835                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6836                 .doit = nl80211_set_rekey_data,
6837                 .policy = nl80211_policy,
6838                 .flags = GENL_ADMIN_PERM,
6839                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6840                                   NL80211_FLAG_NEED_RTNL,
6841         },
6842         {
6843                 .cmd = NL80211_CMD_TDLS_MGMT,
6844                 .doit = nl80211_tdls_mgmt,
6845                 .policy = nl80211_policy,
6846                 .flags = GENL_ADMIN_PERM,
6847                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6848                                   NL80211_FLAG_NEED_RTNL,
6849         },
6850         {
6851                 .cmd = NL80211_CMD_TDLS_OPER,
6852                 .doit = nl80211_tdls_oper,
6853                 .policy = nl80211_policy,
6854                 .flags = GENL_ADMIN_PERM,
6855                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6856                                   NL80211_FLAG_NEED_RTNL,
6857         },
6858         {
6859                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6860                 .doit = nl80211_register_unexpected_frame,
6861                 .policy = nl80211_policy,
6862                 .flags = GENL_ADMIN_PERM,
6863                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6864                                   NL80211_FLAG_NEED_RTNL,
6865         },
6866         {
6867                 .cmd = NL80211_CMD_PROBE_CLIENT,
6868                 .doit = nl80211_probe_client,
6869                 .policy = nl80211_policy,
6870                 .flags = GENL_ADMIN_PERM,
6871                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6872                                   NL80211_FLAG_NEED_RTNL,
6873         },
6874         {
6875                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6876                 .doit = nl80211_register_beacons,
6877                 .policy = nl80211_policy,
6878                 .flags = GENL_ADMIN_PERM,
6879                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6880                                   NL80211_FLAG_NEED_RTNL,
6881         },
6882         {
6883                 .cmd = NL80211_CMD_SET_NOACK_MAP,
6884                 .doit = nl80211_set_noack_map,
6885                 .policy = nl80211_policy,
6886                 .flags = GENL_ADMIN_PERM,
6887                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6888                                   NL80211_FLAG_NEED_RTNL,
6889         },
6890
6891 };
6892
6893 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6894         .name = "mlme",
6895 };
6896
6897 /* multicast groups */
6898 static struct genl_multicast_group nl80211_config_mcgrp = {
6899         .name = "config",
6900 };
6901 static struct genl_multicast_group nl80211_scan_mcgrp = {
6902         .name = "scan",
6903 };
6904 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6905         .name = "regulatory",
6906 };
6907
6908 /* notification functions */
6909
6910 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6911 {
6912         struct sk_buff *msg;
6913
6914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6915         if (!msg)
6916                 return;
6917
6918         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
6919                 nlmsg_free(msg);
6920                 return;
6921         }
6922
6923         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6924                                 nl80211_config_mcgrp.id, GFP_KERNEL);
6925 }
6926
6927 static int nl80211_add_scan_req(struct sk_buff *msg,
6928                                 struct cfg80211_registered_device *rdev)
6929 {
6930         struct cfg80211_scan_request *req = rdev->scan_req;
6931         struct nlattr *nest;
6932         int i;
6933
6934         ASSERT_RDEV_LOCK(rdev);
6935
6936         if (WARN_ON(!req))
6937                 return 0;
6938
6939         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
6940         if (!nest)
6941                 goto nla_put_failure;
6942         for (i = 0; i < req->n_ssids; i++)
6943                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
6944         nla_nest_end(msg, nest);
6945
6946         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
6947         if (!nest)
6948                 goto nla_put_failure;
6949         for (i = 0; i < req->n_channels; i++)
6950                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
6951         nla_nest_end(msg, nest);
6952
6953         if (req->ie)
6954                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
6955
6956         return 0;
6957  nla_put_failure:
6958         return -ENOBUFS;
6959 }
6960
6961 static int nl80211_send_scan_msg(struct sk_buff *msg,
6962                                  struct cfg80211_registered_device *rdev,
6963                                  struct net_device *netdev,
6964                                  u32 pid, u32 seq, int flags,
6965                                  u32 cmd)
6966 {
6967         void *hdr;
6968
6969         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6970         if (!hdr)
6971                 return -1;
6972
6973         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6974         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6975
6976         /* ignore errors and send incomplete event anyway */
6977         nl80211_add_scan_req(msg, rdev);
6978
6979         return genlmsg_end(msg, hdr);
6980
6981  nla_put_failure:
6982         genlmsg_cancel(msg, hdr);
6983         return -EMSGSIZE;
6984 }
6985
6986 static int
6987 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6988                             struct cfg80211_registered_device *rdev,
6989                             struct net_device *netdev,
6990                             u32 pid, u32 seq, int flags, u32 cmd)
6991 {
6992         void *hdr;
6993
6994         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6995         if (!hdr)
6996                 return -1;
6997
6998         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6999         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7000
7001         return genlmsg_end(msg, hdr);
7002
7003  nla_put_failure:
7004         genlmsg_cancel(msg, hdr);
7005         return -EMSGSIZE;
7006 }
7007
7008 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7009                              struct net_device *netdev)
7010 {
7011         struct sk_buff *msg;
7012
7013         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7014         if (!msg)
7015                 return;
7016
7017         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7018                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7019                 nlmsg_free(msg);
7020                 return;
7021         }
7022
7023         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7024                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7025 }
7026
7027 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7028                             struct net_device *netdev)
7029 {
7030         struct sk_buff *msg;
7031
7032         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7033         if (!msg)
7034                 return;
7035
7036         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7037                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7038                 nlmsg_free(msg);
7039                 return;
7040         }
7041
7042         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7043                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7044 }
7045
7046 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7047                                struct net_device *netdev)
7048 {
7049         struct sk_buff *msg;
7050
7051         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7052         if (!msg)
7053                 return;
7054
7055         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7056                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7057                 nlmsg_free(msg);
7058                 return;
7059         }
7060
7061         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7062                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7063 }
7064
7065 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7066                                      struct net_device *netdev)
7067 {
7068         struct sk_buff *msg;
7069
7070         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7071         if (!msg)
7072                 return;
7073
7074         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7075                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7076                 nlmsg_free(msg);
7077                 return;
7078         }
7079
7080         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7081                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7082 }
7083
7084 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7085                              struct net_device *netdev, u32 cmd)
7086 {
7087         struct sk_buff *msg;
7088
7089         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7090         if (!msg)
7091                 return;
7092
7093         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7094                 nlmsg_free(msg);
7095                 return;
7096         }
7097
7098         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7099                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7100 }
7101
7102 /*
7103  * This can happen on global regulatory changes or device specific settings
7104  * based on custom world regulatory domains.
7105  */
7106 void nl80211_send_reg_change_event(struct regulatory_request *request)
7107 {
7108         struct sk_buff *msg;
7109         void *hdr;
7110
7111         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7112         if (!msg)
7113                 return;
7114
7115         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7116         if (!hdr) {
7117                 nlmsg_free(msg);
7118                 return;
7119         }
7120
7121         /* Userspace can always count this one always being set */
7122         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
7123
7124         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
7125                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7126                            NL80211_REGDOM_TYPE_WORLD);
7127         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
7128                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7129                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
7130         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7131                  request->intersect)
7132                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7133                            NL80211_REGDOM_TYPE_INTERSECTION);
7134         else {
7135                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7136                            NL80211_REGDOM_TYPE_COUNTRY);
7137                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
7138         }
7139
7140         if (wiphy_idx_valid(request->wiphy_idx))
7141                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
7142
7143         genlmsg_end(msg, hdr);
7144
7145         rcu_read_lock();
7146         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7147                                 GFP_ATOMIC);
7148         rcu_read_unlock();
7149
7150         return;
7151
7152 nla_put_failure:
7153         genlmsg_cancel(msg, hdr);
7154         nlmsg_free(msg);
7155 }
7156
7157 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7158                                     struct net_device *netdev,
7159                                     const u8 *buf, size_t len,
7160                                     enum nl80211_commands cmd, gfp_t gfp)
7161 {
7162         struct sk_buff *msg;
7163         void *hdr;
7164
7165         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7166         if (!msg)
7167                 return;
7168
7169         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7170         if (!hdr) {
7171                 nlmsg_free(msg);
7172                 return;
7173         }
7174
7175         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7176         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7177         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7178
7179         genlmsg_end(msg, hdr);
7180
7181         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7182                                 nl80211_mlme_mcgrp.id, gfp);
7183         return;
7184
7185  nla_put_failure:
7186         genlmsg_cancel(msg, hdr);
7187         nlmsg_free(msg);
7188 }
7189
7190 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7191                           struct net_device *netdev, const u8 *buf,
7192                           size_t len, gfp_t gfp)
7193 {
7194         nl80211_send_mlme_event(rdev, netdev, buf, len,
7195                                 NL80211_CMD_AUTHENTICATE, gfp);
7196 }
7197
7198 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7199                            struct net_device *netdev, const u8 *buf,
7200                            size_t len, gfp_t gfp)
7201 {
7202         nl80211_send_mlme_event(rdev, netdev, buf, len,
7203                                 NL80211_CMD_ASSOCIATE, gfp);
7204 }
7205
7206 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7207                          struct net_device *netdev, const u8 *buf,
7208                          size_t len, gfp_t gfp)
7209 {
7210         nl80211_send_mlme_event(rdev, netdev, buf, len,
7211                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7212 }
7213
7214 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7215                            struct net_device *netdev, const u8 *buf,
7216                            size_t len, gfp_t gfp)
7217 {
7218         nl80211_send_mlme_event(rdev, netdev, buf, len,
7219                                 NL80211_CMD_DISASSOCIATE, gfp);
7220 }
7221
7222 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7223                                 struct net_device *netdev, const u8 *buf,
7224                                 size_t len, gfp_t gfp)
7225 {
7226         nl80211_send_mlme_event(rdev, netdev, buf, len,
7227                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7228 }
7229
7230 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7231                                   struct net_device *netdev, const u8 *buf,
7232                                   size_t len, gfp_t gfp)
7233 {
7234         nl80211_send_mlme_event(rdev, netdev, buf, len,
7235                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7236 }
7237
7238 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7239                                       struct net_device *netdev, int cmd,
7240                                       const u8 *addr, gfp_t gfp)
7241 {
7242         struct sk_buff *msg;
7243         void *hdr;
7244
7245         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7246         if (!msg)
7247                 return;
7248
7249         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7250         if (!hdr) {
7251                 nlmsg_free(msg);
7252                 return;
7253         }
7254
7255         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7256         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7257         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
7258         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7259
7260         genlmsg_end(msg, hdr);
7261
7262         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7263                                 nl80211_mlme_mcgrp.id, gfp);
7264         return;
7265
7266  nla_put_failure:
7267         genlmsg_cancel(msg, hdr);
7268         nlmsg_free(msg);
7269 }
7270
7271 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7272                                struct net_device *netdev, const u8 *addr,
7273                                gfp_t gfp)
7274 {
7275         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7276                                   addr, gfp);
7277 }
7278
7279 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7280                                 struct net_device *netdev, const u8 *addr,
7281                                 gfp_t gfp)
7282 {
7283         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7284                                   addr, gfp);
7285 }
7286
7287 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7288                                  struct net_device *netdev, const u8 *bssid,
7289                                  const u8 *req_ie, size_t req_ie_len,
7290                                  const u8 *resp_ie, size_t resp_ie_len,
7291                                  u16 status, gfp_t gfp)
7292 {
7293         struct sk_buff *msg;
7294         void *hdr;
7295
7296         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7297         if (!msg)
7298                 return;
7299
7300         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7301         if (!hdr) {
7302                 nlmsg_free(msg);
7303                 return;
7304         }
7305
7306         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7307         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7308         if (bssid)
7309                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7310         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
7311         if (req_ie)
7312                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7313         if (resp_ie)
7314                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7315
7316         genlmsg_end(msg, hdr);
7317
7318         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7319                                 nl80211_mlme_mcgrp.id, gfp);
7320         return;
7321
7322  nla_put_failure:
7323         genlmsg_cancel(msg, hdr);
7324         nlmsg_free(msg);
7325
7326 }
7327
7328 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7329                          struct net_device *netdev, const u8 *bssid,
7330                          const u8 *req_ie, size_t req_ie_len,
7331                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7332 {
7333         struct sk_buff *msg;
7334         void *hdr;
7335
7336         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7337         if (!msg)
7338                 return;
7339
7340         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7341         if (!hdr) {
7342                 nlmsg_free(msg);
7343                 return;
7344         }
7345
7346         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7347         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7348         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7349         if (req_ie)
7350                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7351         if (resp_ie)
7352                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7353
7354         genlmsg_end(msg, hdr);
7355
7356         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7357                                 nl80211_mlme_mcgrp.id, gfp);
7358         return;
7359
7360  nla_put_failure:
7361         genlmsg_cancel(msg, hdr);
7362         nlmsg_free(msg);
7363
7364 }
7365
7366 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7367                                struct net_device *netdev, u16 reason,
7368                                const u8 *ie, size_t ie_len, bool from_ap)
7369 {
7370         struct sk_buff *msg;
7371         void *hdr;
7372
7373         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7374         if (!msg)
7375                 return;
7376
7377         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7378         if (!hdr) {
7379                 nlmsg_free(msg);
7380                 return;
7381         }
7382
7383         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7384         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7385         if (from_ap && reason)
7386                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
7387         if (from_ap)
7388                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
7389         if (ie)
7390                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
7391
7392         genlmsg_end(msg, hdr);
7393
7394         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7395                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7396         return;
7397
7398  nla_put_failure:
7399         genlmsg_cancel(msg, hdr);
7400         nlmsg_free(msg);
7401
7402 }
7403
7404 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7405                              struct net_device *netdev, const u8 *bssid,
7406                              gfp_t gfp)
7407 {
7408         struct sk_buff *msg;
7409         void *hdr;
7410
7411         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7412         if (!msg)
7413                 return;
7414
7415         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7416         if (!hdr) {
7417                 nlmsg_free(msg);
7418                 return;
7419         }
7420
7421         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7422         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7423         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7424
7425         genlmsg_end(msg, hdr);
7426
7427         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7428                                 nl80211_mlme_mcgrp.id, gfp);
7429         return;
7430
7431  nla_put_failure:
7432         genlmsg_cancel(msg, hdr);
7433         nlmsg_free(msg);
7434 }
7435
7436 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7437                 struct net_device *netdev,
7438                 const u8 *macaddr, const u8* ie, u8 ie_len,
7439                 gfp_t gfp)
7440 {
7441         struct sk_buff *msg;
7442         void *hdr;
7443
7444         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7445         if (!msg)
7446                 return;
7447
7448         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7449         if (!hdr) {
7450                 nlmsg_free(msg);
7451                 return;
7452         }
7453
7454         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7455         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7456         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
7457         if (ie_len && ie)
7458                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
7459
7460         genlmsg_end(msg, hdr);
7461
7462         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7463                                 nl80211_mlme_mcgrp.id, gfp);
7464         return;
7465
7466  nla_put_failure:
7467         genlmsg_cancel(msg, hdr);
7468         nlmsg_free(msg);
7469 }
7470
7471 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7472                                  struct net_device *netdev, const u8 *addr,
7473                                  enum nl80211_key_type key_type, int key_id,
7474                                  const u8 *tsc, gfp_t gfp)
7475 {
7476         struct sk_buff *msg;
7477         void *hdr;
7478
7479         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7480         if (!msg)
7481                 return;
7482
7483         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7484         if (!hdr) {
7485                 nlmsg_free(msg);
7486                 return;
7487         }
7488
7489         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7490         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7491         if (addr)
7492                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7493         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
7494         if (key_id != -1)
7495                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
7496         if (tsc)
7497                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
7498
7499         genlmsg_end(msg, hdr);
7500
7501         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7502                                 nl80211_mlme_mcgrp.id, gfp);
7503         return;
7504
7505  nla_put_failure:
7506         genlmsg_cancel(msg, hdr);
7507         nlmsg_free(msg);
7508 }
7509
7510 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7511                                     struct ieee80211_channel *channel_before,
7512                                     struct ieee80211_channel *channel_after)
7513 {
7514         struct sk_buff *msg;
7515         void *hdr;
7516         struct nlattr *nl_freq;
7517
7518         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7519         if (!msg)
7520                 return;
7521
7522         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7523         if (!hdr) {
7524                 nlmsg_free(msg);
7525                 return;
7526         }
7527
7528         /*
7529          * Since we are applying the beacon hint to a wiphy we know its
7530          * wiphy_idx is valid
7531          */
7532         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
7533
7534         /* Before */
7535         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7536         if (!nl_freq)
7537                 goto nla_put_failure;
7538         if (nl80211_msg_put_channel(msg, channel_before))
7539                 goto nla_put_failure;
7540         nla_nest_end(msg, nl_freq);
7541
7542         /* After */
7543         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7544         if (!nl_freq)
7545                 goto nla_put_failure;
7546         if (nl80211_msg_put_channel(msg, channel_after))
7547                 goto nla_put_failure;
7548         nla_nest_end(msg, nl_freq);
7549
7550         genlmsg_end(msg, hdr);
7551
7552         rcu_read_lock();
7553         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7554                                 GFP_ATOMIC);
7555         rcu_read_unlock();
7556
7557         return;
7558
7559 nla_put_failure:
7560         genlmsg_cancel(msg, hdr);
7561         nlmsg_free(msg);
7562 }
7563
7564 static void nl80211_send_remain_on_chan_event(
7565         int cmd, struct cfg80211_registered_device *rdev,
7566         struct net_device *netdev, u64 cookie,
7567         struct ieee80211_channel *chan,
7568         enum nl80211_channel_type channel_type,
7569         unsigned int duration, gfp_t gfp)
7570 {
7571         struct sk_buff *msg;
7572         void *hdr;
7573
7574         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7575         if (!msg)
7576                 return;
7577
7578         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7579         if (!hdr) {
7580                 nlmsg_free(msg);
7581                 return;
7582         }
7583
7584         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7585         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7586         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
7587         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
7588         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7589
7590         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
7591                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
7592
7593         genlmsg_end(msg, hdr);
7594
7595         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7596                                 nl80211_mlme_mcgrp.id, gfp);
7597         return;
7598
7599  nla_put_failure:
7600         genlmsg_cancel(msg, hdr);
7601         nlmsg_free(msg);
7602 }
7603
7604 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7605                                     struct net_device *netdev, u64 cookie,
7606                                     struct ieee80211_channel *chan,
7607                                     enum nl80211_channel_type channel_type,
7608                                     unsigned int duration, gfp_t gfp)
7609 {
7610         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7611                                           rdev, netdev, cookie, chan,
7612                                           channel_type, duration, gfp);
7613 }
7614
7615 void nl80211_send_remain_on_channel_cancel(
7616         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7617         u64 cookie, struct ieee80211_channel *chan,
7618         enum nl80211_channel_type channel_type, gfp_t gfp)
7619 {
7620         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7621                                           rdev, netdev, cookie, chan,
7622                                           channel_type, 0, gfp);
7623 }
7624
7625 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7626                             struct net_device *dev, const u8 *mac_addr,
7627                             struct station_info *sinfo, gfp_t gfp)
7628 {
7629         struct sk_buff *msg;
7630
7631         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7632         if (!msg)
7633                 return;
7634
7635         if (nl80211_send_station(msg, 0, 0, 0,
7636                                  rdev, dev, mac_addr, sinfo) < 0) {
7637                 nlmsg_free(msg);
7638                 return;
7639         }
7640
7641         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7642                                 nl80211_mlme_mcgrp.id, gfp);
7643 }
7644
7645 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7646                                 struct net_device *dev, const u8 *mac_addr,
7647                                 gfp_t gfp)
7648 {
7649         struct sk_buff *msg;
7650         void *hdr;
7651
7652         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7653         if (!msg)
7654                 return;
7655
7656         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7657         if (!hdr) {
7658                 nlmsg_free(msg);
7659                 return;
7660         }
7661
7662         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7663         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
7664
7665         genlmsg_end(msg, hdr);
7666
7667         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7668                                 nl80211_mlme_mcgrp.id, gfp);
7669         return;
7670
7671  nla_put_failure:
7672         genlmsg_cancel(msg, hdr);
7673         nlmsg_free(msg);
7674 }
7675
7676 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7677                                        const u8 *addr, gfp_t gfp)
7678 {
7679         struct wireless_dev *wdev = dev->ieee80211_ptr;
7680         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7681         struct sk_buff *msg;
7682         void *hdr;
7683         int err;
7684         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7685
7686         if (!nlpid)
7687                 return false;
7688
7689         msg = nlmsg_new(100, gfp);
7690         if (!msg)
7691                 return true;
7692
7693         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7694         if (!hdr) {
7695                 nlmsg_free(msg);
7696                 return true;
7697         }
7698
7699         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7700         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7701         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7702
7703         err = genlmsg_end(msg, hdr);
7704         if (err < 0) {
7705                 nlmsg_free(msg);
7706                 return true;
7707         }
7708
7709         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7710         return true;
7711
7712  nla_put_failure:
7713         genlmsg_cancel(msg, hdr);
7714         nlmsg_free(msg);
7715         return true;
7716 }
7717
7718 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7719 {
7720         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7721                                           addr, gfp);
7722 }
7723
7724 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7725                                     const u8 *addr, gfp_t gfp)
7726 {
7727         return __nl80211_unexpected_frame(dev,
7728                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7729                                           addr, gfp);
7730 }
7731
7732 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7733                       struct net_device *netdev, u32 nlpid,
7734                       int freq, int sig_dbm,
7735                       const u8 *buf, size_t len, gfp_t gfp)
7736 {
7737         struct sk_buff *msg;
7738         void *hdr;
7739
7740         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7741         if (!msg)
7742                 return -ENOMEM;
7743
7744         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7745         if (!hdr) {
7746                 nlmsg_free(msg);
7747                 return -ENOMEM;
7748         }
7749
7750         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7751         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7752         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7753         if (sig_dbm)
7754                 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
7755         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7756
7757         genlmsg_end(msg, hdr);
7758
7759         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7760
7761  nla_put_failure:
7762         genlmsg_cancel(msg, hdr);
7763         nlmsg_free(msg);
7764         return -ENOBUFS;
7765 }
7766
7767 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7768                                  struct net_device *netdev, u64 cookie,
7769                                  const u8 *buf, size_t len, bool ack,
7770                                  gfp_t gfp)
7771 {
7772         struct sk_buff *msg;
7773         void *hdr;
7774
7775         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7776         if (!msg)
7777                 return;
7778
7779         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7780         if (!hdr) {
7781                 nlmsg_free(msg);
7782                 return;
7783         }
7784
7785         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7786         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7787         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7788         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7789         if (ack)
7790                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7791
7792         genlmsg_end(msg, hdr);
7793
7794         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7795         return;
7796
7797  nla_put_failure:
7798         genlmsg_cancel(msg, hdr);
7799         nlmsg_free(msg);
7800 }
7801
7802 void
7803 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7804                              struct net_device *netdev,
7805                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7806                              gfp_t gfp)
7807 {
7808         struct sk_buff *msg;
7809         struct nlattr *pinfoattr;
7810         void *hdr;
7811
7812         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7813         if (!msg)
7814                 return;
7815
7816         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7817         if (!hdr) {
7818                 nlmsg_free(msg);
7819                 return;
7820         }
7821
7822         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7823         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7824
7825         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7826         if (!pinfoattr)
7827                 goto nla_put_failure;
7828
7829         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7830                     rssi_event);
7831
7832         nla_nest_end(msg, pinfoattr);
7833
7834         genlmsg_end(msg, hdr);
7835
7836         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7837                                 nl80211_mlme_mcgrp.id, gfp);
7838         return;
7839
7840  nla_put_failure:
7841         genlmsg_cancel(msg, hdr);
7842         nlmsg_free(msg);
7843 }
7844
7845 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7846                               struct net_device *netdev, const u8 *bssid,
7847                               const u8 *replay_ctr, gfp_t gfp)
7848 {
7849         struct sk_buff *msg;
7850         struct nlattr *rekey_attr;
7851         void *hdr;
7852
7853         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7854         if (!msg)
7855                 return;
7856
7857         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7858         if (!hdr) {
7859                 nlmsg_free(msg);
7860                 return;
7861         }
7862
7863         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7864         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7865         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7866
7867         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7868         if (!rekey_attr)
7869                 goto nla_put_failure;
7870
7871         NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7872                 NL80211_REPLAY_CTR_LEN, replay_ctr);
7873
7874         nla_nest_end(msg, rekey_attr);
7875
7876         genlmsg_end(msg, hdr);
7877
7878         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7879                                 nl80211_mlme_mcgrp.id, gfp);
7880         return;
7881
7882  nla_put_failure:
7883         genlmsg_cancel(msg, hdr);
7884         nlmsg_free(msg);
7885 }
7886
7887 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
7888                                     struct net_device *netdev, int index,
7889                                     const u8 *bssid, bool preauth, gfp_t gfp)
7890 {
7891         struct sk_buff *msg;
7892         struct nlattr *attr;
7893         void *hdr;
7894
7895         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7896         if (!msg)
7897                 return;
7898
7899         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
7900         if (!hdr) {
7901                 nlmsg_free(msg);
7902                 return;
7903         }
7904
7905         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7906         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7907
7908         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
7909         if (!attr)
7910                 goto nla_put_failure;
7911
7912         NLA_PUT_U32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index);
7913         NLA_PUT(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid);
7914         if (preauth)
7915                 NLA_PUT_FLAG(msg, NL80211_PMKSA_CANDIDATE_PREAUTH);
7916
7917         nla_nest_end(msg, attr);
7918
7919         genlmsg_end(msg, hdr);
7920
7921         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7922                                 nl80211_mlme_mcgrp.id, gfp);
7923         return;
7924
7925  nla_put_failure:
7926         genlmsg_cancel(msg, hdr);
7927         nlmsg_free(msg);
7928 }
7929
7930 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
7931                               struct net_device *netdev, int freq,
7932                               enum nl80211_channel_type type, gfp_t gfp)
7933 {
7934         struct sk_buff *msg;
7935         void *hdr;
7936
7937         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7938         if (!msg)
7939                 return;
7940
7941         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
7942         if (!hdr) {
7943                 nlmsg_free(msg);
7944                 return;
7945         }
7946
7947         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7948         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7949         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type);
7950
7951         genlmsg_end(msg, hdr);
7952
7953         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7954                                 nl80211_mlme_mcgrp.id, gfp);
7955         return;
7956
7957  nla_put_failure:
7958         genlmsg_cancel(msg, hdr);
7959         nlmsg_free(msg);
7960 }
7961
7962 void
7963 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
7964                                 struct net_device *netdev, const u8 *peer,
7965                                 u32 num_packets, gfp_t gfp)
7966 {
7967         struct sk_buff *msg;
7968         struct nlattr *pinfoattr;
7969         void *hdr;
7970
7971         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7972         if (!msg)
7973                 return;
7974
7975         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7976         if (!hdr) {
7977                 nlmsg_free(msg);
7978                 return;
7979         }
7980
7981         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7982         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7983         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
7984
7985         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7986         if (!pinfoattr)
7987                 goto nla_put_failure;
7988
7989         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
7990
7991         nla_nest_end(msg, pinfoattr);
7992
7993         genlmsg_end(msg, hdr);
7994
7995         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7996                                 nl80211_mlme_mcgrp.id, gfp);
7997         return;
7998
7999  nla_put_failure:
8000         genlmsg_cancel(msg, hdr);
8001         nlmsg_free(msg);
8002 }
8003
8004 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8005                            u64 cookie, bool acked, gfp_t gfp)
8006 {
8007         struct wireless_dev *wdev = dev->ieee80211_ptr;
8008         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8009         struct sk_buff *msg;
8010         void *hdr;
8011         int err;
8012
8013         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8014         if (!msg)
8015                 return;
8016
8017         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8018         if (!hdr) {
8019                 nlmsg_free(msg);
8020                 return;
8021         }
8022
8023         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
8024         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
8025         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
8026         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
8027         if (acked)
8028                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
8029
8030         err = genlmsg_end(msg, hdr);
8031         if (err < 0) {
8032                 nlmsg_free(msg);
8033                 return;
8034         }
8035
8036         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8037                                 nl80211_mlme_mcgrp.id, gfp);
8038         return;
8039
8040  nla_put_failure:
8041         genlmsg_cancel(msg, hdr);
8042         nlmsg_free(msg);
8043 }
8044 EXPORT_SYMBOL(cfg80211_probe_status);
8045
8046 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8047                                  const u8 *frame, size_t len,
8048                                  int freq, int sig_dbm, gfp_t gfp)
8049 {
8050         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8051         struct sk_buff *msg;
8052         void *hdr;
8053         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8054
8055         if (!nlpid)
8056                 return;
8057
8058         msg = nlmsg_new(len + 100, gfp);
8059         if (!msg)
8060                 return;
8061
8062         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8063         if (!hdr) {
8064                 nlmsg_free(msg);
8065                 return;
8066         }
8067
8068         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
8069         if (freq)
8070                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
8071         if (sig_dbm)
8072                 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
8073         NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
8074
8075         genlmsg_end(msg, hdr);
8076
8077         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8078         return;
8079
8080  nla_put_failure:
8081         genlmsg_cancel(msg, hdr);
8082         nlmsg_free(msg);
8083 }
8084 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8085
8086 static int nl80211_netlink_notify(struct notifier_block * nb,
8087                                   unsigned long state,
8088                                   void *_notify)
8089 {
8090         struct netlink_notify *notify = _notify;
8091         struct cfg80211_registered_device *rdev;
8092         struct wireless_dev *wdev;
8093
8094         if (state != NETLINK_URELEASE)
8095                 return NOTIFY_DONE;
8096
8097         rcu_read_lock();
8098
8099         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8100                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8101                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8102                 if (rdev->ap_beacons_nlpid == notify->pid)
8103                         rdev->ap_beacons_nlpid = 0;
8104         }
8105
8106         rcu_read_unlock();
8107
8108         return NOTIFY_DONE;
8109 }
8110
8111 static struct notifier_block nl80211_netlink_notifier = {
8112         .notifier_call = nl80211_netlink_notify,
8113 };
8114
8115 /* initialisation/exit functions */
8116
8117 int nl80211_init(void)
8118 {
8119         int err;
8120
8121         err = genl_register_family_with_ops(&nl80211_fam,
8122                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8123         if (err)
8124                 return err;
8125
8126         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8127         if (err)
8128                 goto err_out;
8129
8130         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8131         if (err)
8132                 goto err_out;
8133
8134         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8135         if (err)
8136                 goto err_out;
8137
8138         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8139         if (err)
8140                 goto err_out;
8141
8142 #ifdef CONFIG_NL80211_TESTMODE
8143         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8144         if (err)
8145                 goto err_out;
8146 #endif
8147
8148         err = netlink_register_notifier(&nl80211_netlink_notifier);
8149         if (err)
8150                 goto err_out;
8151
8152         return 0;
8153  err_out:
8154         genl_unregister_family(&nl80211_fam);
8155         return err;
8156 }
8157
8158 void nl80211_exit(void)
8159 {
8160         netlink_unregister_notifier(&nl80211_netlink_notifier);
8161         genl_unregister_family(&nl80211_fam);
8162 }