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