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 /* the netlink family */
  27 static struct genl_family nl80211_fam = {
  28         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  29         .name = "nl80211",      /* have users key off the name instead */
  30         .hdrsize = 0,           /* no private header */
  31         .version = 1,           /* no particular meaning now */
  32         .maxattr = NL80211_ATTR_MAX,
  33         .netnsok = true,
  34 };
  35
  36 /* internal helper: get rdev and dev */
  37 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  38                                        struct cfg80211_registered_device **rdev,
  39                                        struct net_device **dev)
  40 {
  41         struct nlattr **attrs = info->attrs;
  42         int ifindex;
  43
  44         if (!attrs[NL80211_ATTR_IFINDEX])
  45                 return -EINVAL;
  46
  47         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  48         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  49         if (!*dev)
  50                 return -ENODEV;
  51
  52         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  53         if (IS_ERR(*rdev)) {
  54                 dev_put(*dev);
  55                 return PTR_ERR(*rdev);
  56         }
  57
  58         return 0;
  59 }
  60
  61 /* policy for the attributes */
  62 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  63         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  64         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  65                                       .len = 20-1 },
  66         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  67         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  69         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  71         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  72         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  73         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  74
  75         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  77         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  78
  79         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  80         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  81
  82         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  83         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  84                                     .len = WLAN_MAX_KEY_LEN },
  85         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  86         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  87         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  88         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  89
  90         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  91         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  92         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  93                                        .len = IEEE80211_MAX_DATA_LEN },
  94         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  95                                        .len = IEEE80211_MAX_DATA_LEN },
  96         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  97         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  98         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  99         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 100                                                .len = NL80211_MAX_SUPP_RATES },
 101         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 102         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 103         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 104         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 105                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 106         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 107
 108         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 109         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 110
 111         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 113         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 114         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 115                                            .len = NL80211_MAX_SUPP_RATES },
 116
 117         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 120                                          .len = NL80211_HT_CAPABILITY_LEN },
 121
 122         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 123         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 124                               .len = IEEE80211_MAX_DATA_LEN },
 125         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 126         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 127
 128         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 129                                 .len = IEEE80211_MAX_SSID_LEN },
 130         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 131         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 132         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 134         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 135         [NL80211_ATTR_STA_FLAGS2] = {
 136                 .len = sizeof(struct nl80211_sta_flag_update),
 137         },
 138         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 139         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 140         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 141         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 142         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 143         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 144         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 145                                  .len = WLAN_PMKID_LEN },
 146         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 147         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 148         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 149         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 150                                  .len = IEEE80211_MAX_DATA_LEN },
 151         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 152         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 153         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 154         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 155         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 156 };
 157
 158 /* policy for the attributes */
 159 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 160         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 161         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 162         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 163         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 164         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 165         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 166 };
 167
 168 /* ifidx get helper */
 169 static int nl80211_get_ifidx(struct netlink_callback *cb)
 170 {
 171         int res;
 172
 173         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 174                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 175                           nl80211_policy);
 176         if (res)
 177                 return res;
 178
 179         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 180                 return -EINVAL;
 181
 182         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 183         if (!res)
 184                 return -EINVAL;
 185         return res;
 186 }
 187
 188 /* IE validation */
 189 static bool is_valid_ie_attr(const struct nlattr *attr)
 190 {
 191         const u8 *pos;
 192         int len;
 193
 194         if (!attr)
 195                 return true;
 196
 197         pos = nla_data(attr);
 198         len = nla_len(attr);
 199
 200         while (len) {
 201                 u8 elemlen;
 202
 203                 if (len < 2)
 204                         return false;
 205                 len -= 2;
 206
 207                 elemlen = pos[1];
 208                 if (elemlen > len)
 209                         return false;
 210
 211                 len -= elemlen;
 212                 pos += 2 + elemlen;
 213         }
 214
 215         return true;
 216 }
 217
 218 /* message building helper */
 219 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 220                                    int flags, u8 cmd)
 221 {
 222         /* since there is no private header just add the generic one */
 223         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 224 }
 225
 226 static int nl80211_msg_put_channel(struct sk_buff *msg,
 227                                    struct ieee80211_channel *chan)
 228 {
 229         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 230                     chan->center_freq);
 231
 232         if (chan->flags & IEEE80211_CHAN_DISABLED)
 233                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 234         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 235                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 236         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 237                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 238         if (chan->flags & IEEE80211_CHAN_RADAR)
 239                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 240
 241         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 242                     DBM_TO_MBM(chan->max_power));
 243
 244         return 0;
 245
 246  nla_put_failure:
 247         return -ENOBUFS;
 248 }
 249
 250 /* netlink command implementations */
 251
 252 struct key_parse {
 253         struct key_params p;
 254         int idx;
 255         bool def, defmgmt;
 256 };
 257
 258 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 259 {
 260         struct nlattr *tb[NL80211_KEY_MAX + 1];
 261         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 262                                    nl80211_key_policy);
 263         if (err)
 264                 return err;
 265
 266         k->def = !!tb[NL80211_KEY_DEFAULT];
 267         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 268
 269         if (tb[NL80211_KEY_IDX])
 270                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 271
 272         if (tb[NL80211_KEY_DATA]) {
 273                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 274                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 275         }
 276
 277         if (tb[NL80211_KEY_SEQ]) {
 278                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 279                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 280         }
 281
 282         if (tb[NL80211_KEY_CIPHER])
 283                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 284
 285         return 0;
 286 }
 287
 288 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 289 {
 290         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 291                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 292                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 293         }
 294
 295         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 296                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 297                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 298         }
 299
 300         if (info->attrs[NL80211_ATTR_KEY_IDX])
 301                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 302
 303         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 304                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 305
 306         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 307         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 308
 309         return 0;
 310 }
 311
 312 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 313 {
 314         int err;
 315
 316         memset(k, 0, sizeof(*k));
 317         k->idx = -1;
 318
 319         if (info->attrs[NL80211_ATTR_KEY])
 320                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 321         else
 322                 err = nl80211_parse_key_old(info, k);
 323
 324         if (err)
 325                 return err;
 326
 327         if (k->def && k->defmgmt)
 328                 return -EINVAL;
 329
 330         if (k->idx != -1) {
 331                 if (k->defmgmt) {
 332                         if (k->idx < 4 || k->idx > 5)
 333                                 return -EINVAL;
 334                 } else if (k->def) {
 335                         if (k->idx < 0 || k->idx > 3)
 336                                 return -EINVAL;
 337                 } else {
 338                         if (k->idx < 0 || k->idx > 5)
 339                                 return -EINVAL;
 340                 }
 341         }
 342
 343         return 0;
 344 }
 345
 346 static struct cfg80211_cached_keys *
 347 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 348                        struct nlattr *keys)
 349 {
 350         struct key_parse parse;
 351         struct nlattr *key;
 352         struct cfg80211_cached_keys *result;
 353         int rem, err, def = 0;
 354
 355         result = kzalloc(sizeof(*result), GFP_KERNEL);
 356         if (!result)
 357                 return ERR_PTR(-ENOMEM);
 358
 359         result->def = -1;
 360         result->defmgmt = -1;
 361
 362         nla_for_each_nested(key, keys, rem) {
 363                 memset(&parse, 0, sizeof(parse));
 364                 parse.idx = -1;
 365
 366                 err = nl80211_parse_key_new(key, &parse);
 367                 if (err)
 368                         goto error;
 369                 err = -EINVAL;
 370                 if (!parse.p.key)
 371                         goto error;
 372                 if (parse.idx < 0 || parse.idx > 4)
 373                         goto error;
 374                 if (parse.def) {
 375                         if (def)
 376                                 goto error;
 377                         def = 1;
 378                         result->def = parse.idx;
 379                 } else if (parse.defmgmt)
 380                         goto error;
 381                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 382                                                      parse.idx, NULL);
 383                 if (err)
 384                         goto error;
 385                 result->params[parse.idx].cipher = parse.p.cipher;
 386                 result->params[parse.idx].key_len = parse.p.key_len;
 387                 result->params[parse.idx].key = result->data[parse.idx];
 388                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 389         }
 390
 391         return result;
 392  error:
 393         kfree(result);
 394         return ERR_PTR(err);
 395 }
 396
 397 static int nl80211_key_allowed(struct wireless_dev *wdev)
 398 {
 399         ASSERT_WDEV_LOCK(wdev);
 400
 401         if (!netif_running(wdev->netdev))
 402                 return -ENETDOWN;
 403
 404         switch (wdev->iftype) {
 405         case NL80211_IFTYPE_AP:
 406         case NL80211_IFTYPE_AP_VLAN:
 407                 break;
 408         case NL80211_IFTYPE_ADHOC:
 409                 if (!wdev->current_bss)
 410                         return -ENOLINK;
 411                 break;
 412         case NL80211_IFTYPE_STATION:
 413                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 414                         return -ENOLINK;
 415                 break;
 416         default:
 417                 return -EINVAL;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 424                               struct cfg80211_registered_device *dev)
 425 {
 426         void *hdr;
 427         struct nlattr *nl_bands, *nl_band;
 428         struct nlattr *nl_freqs, *nl_freq;
 429         struct nlattr *nl_rates, *nl_rate;
 430         struct nlattr *nl_modes;
 431         struct nlattr *nl_cmds;
 432         enum ieee80211_band band;
 433         struct ieee80211_channel *chan;
 434         struct ieee80211_rate *rate;
 435         int i;
 436         u16 ifmodes = dev->wiphy.interface_modes;
 437
 438         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 439         if (!hdr)
 440                 return -1;
 441
 442         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 443         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 444
 445         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 446                     cfg80211_rdev_list_generation);
 447
 448         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 449                    dev->wiphy.retry_short);
 450         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 451                    dev->wiphy.retry_long);
 452         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 453                     dev->wiphy.frag_threshold);
 454         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 455                     dev->wiphy.rts_threshold);
 456         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 457                     dev->wiphy.coverage_class);
 458
 459         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 460                    dev->wiphy.max_scan_ssids);
 461         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 462                     dev->wiphy.max_scan_ie_len);
 463
 464         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 465                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 466                 dev->wiphy.cipher_suites);
 467
 468         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 469                    dev->wiphy.max_num_pmkids);
 470
 471         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 472         if (!nl_modes)
 473                 goto nla_put_failure;
 474
 475         i = 0;
 476         while (ifmodes) {
 477                 if (ifmodes & 1)
 478                         NLA_PUT_FLAG(msg, i);
 479                 ifmodes >>= 1;
 480                 i++;
 481         }
 482
 483         nla_nest_end(msg, nl_modes);
 484
 485         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 486         if (!nl_bands)
 487                 goto nla_put_failure;
 488
 489         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 490                 if (!dev->wiphy.bands[band])
 491                         continue;
 492
 493                 nl_band = nla_nest_start(msg, band);
 494                 if (!nl_band)
 495                         goto nla_put_failure;
 496
 497                 /* add HT info */
 498                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 499                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 500                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 501                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 502                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 503                                 dev->wiphy.bands[band]->ht_cap.cap);
 504                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 505                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 506                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 507                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 508                 }
 509
 510                 /* add frequencies */
 511                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 512                 if (!nl_freqs)
 513                         goto nla_put_failure;
 514
 515                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 516                         nl_freq = nla_nest_start(msg, i);
 517                         if (!nl_freq)
 518                                 goto nla_put_failure;
 519
 520                         chan = &dev->wiphy.bands[band]->channels[i];
 521
 522                         if (nl80211_msg_put_channel(msg, chan))
 523                                 goto nla_put_failure;
 524
 525                         nla_nest_end(msg, nl_freq);
 526                 }
 527
 528                 nla_nest_end(msg, nl_freqs);
 529
 530                 /* add bitrates */
 531                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 532                 if (!nl_rates)
 533                         goto nla_put_failure;
 534
 535                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 536                         nl_rate = nla_nest_start(msg, i);
 537                         if (!nl_rate)
 538                                 goto nla_put_failure;
 539
 540                         rate = &dev->wiphy.bands[band]->bitrates[i];
 541                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 542                                     rate->bitrate);
 543                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 544                                 NLA_PUT_FLAG(msg,
 545                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 546
 547                         nla_nest_end(msg, nl_rate);
 548                 }
 549
 550                 nla_nest_end(msg, nl_rates);
 551
 552                 nla_nest_end(msg, nl_band);
 553         }
 554         nla_nest_end(msg, nl_bands);
 555
 556         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 557         if (!nl_cmds)
 558                 goto nla_put_failure;
 559
 560         i = 0;
 561 #define CMD(op, n)                                              \
 562          do {                                                   \
 563                 if (dev->ops->op) {                             \
 564                         i++;                                    \
 565                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 566                 }                                               \
 567         } while (0)
 568
 569         CMD(add_virtual_intf, NEW_INTERFACE);
 570         CMD(change_virtual_intf, SET_INTERFACE);
 571         CMD(add_key, NEW_KEY);
 572         CMD(add_beacon, NEW_BEACON);
 573         CMD(add_station, NEW_STATION);
 574         CMD(add_mpath, NEW_MPATH);
 575         CMD(set_mesh_params, SET_MESH_PARAMS);
 576         CMD(change_bss, SET_BSS);
 577         CMD(auth, AUTHENTICATE);
 578         CMD(assoc, ASSOCIATE);
 579         CMD(deauth, DEAUTHENTICATE);
 580         CMD(disassoc, DISASSOCIATE);
 581         CMD(join_ibss, JOIN_IBSS);
 582         CMD(set_pmksa, SET_PMKSA);
 583         CMD(del_pmksa, DEL_PMKSA);
 584         CMD(flush_pmksa, FLUSH_PMKSA);
 585         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 586         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 587         CMD(action, ACTION);
 588         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 589                 i++;
 590                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 591         }
 592         CMD(set_channel, SET_CHANNEL);
 593
 594 #undef CMD
 595
 596         if (dev->ops->connect || dev->ops->auth) {
 597                 i++;
 598                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 599         }
 600
 601         if (dev->ops->disconnect || dev->ops->deauth) {
 602                 i++;
 603                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 604         }
 605
 606         nla_nest_end(msg, nl_cmds);
 607
 608         return genlmsg_end(msg, hdr);
 609
 610  nla_put_failure:
 611         genlmsg_cancel(msg, hdr);
 612         return -EMSGSIZE;
 613 }
 614
 615 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 616 {
 617         int idx = 0;
 618         int start = cb->args[0];
 619         struct cfg80211_registered_device *dev;
 620
 621         mutex_lock(&cfg80211_mutex);
 622         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 623                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 624                         continue;
 625                 if (++idx <= start)
 626                         continue;
 627                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 628                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 629                                        dev) < 0) {
 630                         idx--;
 631                         break;
 632                 }
 633         }
 634         mutex_unlock(&cfg80211_mutex);
 635
 636         cb->args[0] = idx;
 637
 638         return skb->len;
 639 }
 640
 641 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 642 {
 643         struct sk_buff *msg;
 644         struct cfg80211_registered_device *dev;
 645
 646         dev = cfg80211_get_dev_from_info(info);
 647         if (IS_ERR(dev))
 648                 return PTR_ERR(dev);
 649
 650         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 651         if (!msg)
 652                 goto out_err;
 653
 654         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 655                 goto out_free;
 656
 657         cfg80211_unlock_rdev(dev);
 658
 659         return genlmsg_reply(msg, info);
 660
 661  out_free:
 662         nlmsg_free(msg);
 663  out_err:
 664         cfg80211_unlock_rdev(dev);
 665         return -ENOBUFS;
 666 }
 667
 668 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 669         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 670         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 671         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 672         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 673         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 674 };
 675
 676 static int parse_txq_params(struct nlattr *tb[],
 677                             struct ieee80211_txq_params *txq_params)
 678 {
 679         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 680             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 681             !tb[NL80211_TXQ_ATTR_AIFS])
 682                 return -EINVAL;
 683
 684         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 685         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 686         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 687         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 688         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 689
 690         return 0;
 691 }
 692
 693 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 694 {
 695         /*
 696          * You can only set the channel explicitly for AP, mesh
 697          * and WDS type interfaces; all others have their channel
 698          * managed via their respective "establish a connection"
 699          * command (connect, join, ...)
 700          *
 701          * Monitors are special as they are normally slaved to
 702          * whatever else is going on, so they behave as though
 703          * you tried setting the wiphy channel itself.
 704          */
 705         return !wdev ||
 706                 wdev->iftype == NL80211_IFTYPE_AP ||
 707                 wdev->iftype == NL80211_IFTYPE_WDS ||
 708                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 709                 wdev->iftype == NL80211_IFTYPE_MONITOR;
 710 }
 711
 712 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 713                                  struct wireless_dev *wdev,
 714                                  struct genl_info *info)
 715 {
 716         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 717         u32 freq;
 718         int result;
 719
 720         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 721                 return -EINVAL;
 722
 723         if (!nl80211_can_set_dev_channel(wdev))
 724                 return -EOPNOTSUPP;
 725
 726         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 727                 channel_type = nla_get_u32(info->attrs[
 728                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 729                 if (channel_type != NL80211_CHAN_NO_HT &&
 730                     channel_type != NL80211_CHAN_HT20 &&
 731                     channel_type != NL80211_CHAN_HT40PLUS &&
 732                     channel_type != NL80211_CHAN_HT40MINUS)
 733                         return -EINVAL;
 734         }
 735
 736         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 737
 738         mutex_lock(&rdev->devlist_mtx);
 739         if (wdev) {
 740                 wdev_lock(wdev);
 741                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 742                 wdev_unlock(wdev);
 743         } else {
 744                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 745         }
 746         mutex_unlock(&rdev->devlist_mtx);
 747
 748         return result;
 749 }
 750
 751 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 752 {
 753         struct cfg80211_registered_device *rdev;
 754         struct net_device *netdev;
 755         int result;
 756
 757         rtnl_lock();
 758
 759         result = get_rdev_dev_by_info_ifindex(info, &rdev, &netdev);
 760         if (result)
 761                 goto unlock;
 762
 763         result = __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 764
 765  unlock:
 766         rtnl_unlock();
 767
 768         return result;
 769 }
 770
 771 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 772 {
 773         struct cfg80211_registered_device *rdev;
 774         struct net_device *netdev = NULL;
 775         struct wireless_dev *wdev;
 776         int result, rem_txq_params = 0;
 777         struct nlattr *nl_txq_params;
 778         u32 changed;
 779         u8 retry_short = 0, retry_long = 0;
 780         u32 frag_threshold = 0, rts_threshold = 0;
 781         u8 coverage_class = 0;
 782
 783         rtnl_lock();
 784
 785         /*
 786          * Try to find the wiphy and netdev. Normally this
 787          * function shouldn't need the netdev, but this is
 788          * done for backward compatibility -- previously
 789          * setting the channel was done per wiphy, but now
 790          * it is per netdev. Previous userland like hostapd
 791          * also passed a netdev to set_wiphy, so that it is
 792          * possible to let that go to the right netdev!
 793          */
 794         mutex_lock(&cfg80211_mutex);
 795
 796         if (info->attrs[NL80211_ATTR_IFINDEX]) {
 797                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
 798
 799                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
 800                 if (netdev && netdev->ieee80211_ptr) {
 801                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
 802                         mutex_lock(&rdev->mtx);
 803                 } else
 804                         netdev = NULL;
 805         }
 806
 807         if (!netdev) {
 808                 rdev = __cfg80211_rdev_from_info(info);
 809                 if (IS_ERR(rdev)) {
 810                         mutex_unlock(&cfg80211_mutex);
 811                         result = PTR_ERR(rdev);
 812                         goto unlock;
 813                 }
 814                 wdev = NULL;
 815                 netdev = NULL;
 816                 result = 0;
 817
 818                 mutex_lock(&rdev->mtx);
 819         } else if (netif_running(netdev) &&
 820                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
 821                 wdev = netdev->ieee80211_ptr;
 822         else
 823                 wdev = NULL;
 824
 825         /*
 826          * end workaround code, by now the rdev is available
 827          * and locked, and wdev may or may not be NULL.
 828          */
 829
 830         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 831                 result = cfg80211_dev_rename(
 832                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 833
 834         mutex_unlock(&cfg80211_mutex);
 835
 836         if (result)
 837                 goto bad_res;
 838
 839         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 840                 struct ieee80211_txq_params txq_params;
 841                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 842
 843                 if (!rdev->ops->set_txq_params) {
 844                         result = -EOPNOTSUPP;
 845                         goto bad_res;
 846                 }
 847
 848                 nla_for_each_nested(nl_txq_params,
 849                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 850                                     rem_txq_params) {
 851                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 852                                   nla_data(nl_txq_params),
 853                                   nla_len(nl_txq_params),
 854                                   txq_params_policy);
 855                         result = parse_txq_params(tb, &txq_params);
 856                         if (result)
 857                                 goto bad_res;
 858
 859                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 860                                                            &txq_params);
 861                         if (result)
 862                                 goto bad_res;
 863                 }
 864         }
 865
 866         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 867                 result = __nl80211_set_channel(rdev, wdev, info);
 868                 if (result)
 869                         goto bad_res;
 870         }
 871
 872         changed = 0;
 873
 874         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 875                 retry_short = nla_get_u8(
 876                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 877                 if (retry_short == 0) {
 878                         result = -EINVAL;
 879                         goto bad_res;
 880                 }
 881                 changed |= WIPHY_PARAM_RETRY_SHORT;
 882         }
 883
 884         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 885                 retry_long = nla_get_u8(
 886                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 887                 if (retry_long == 0) {
 888                         result = -EINVAL;
 889                         goto bad_res;
 890                 }
 891                 changed |= WIPHY_PARAM_RETRY_LONG;
 892         }
 893
 894         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 895                 frag_threshold = nla_get_u32(
 896                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 897                 if (frag_threshold < 256) {
 898                         result = -EINVAL;
 899                         goto bad_res;
 900                 }
 901                 if (frag_threshold != (u32) -1) {
 902                         /*
 903                          * Fragments (apart from the last one) are required to
 904                          * have even length. Make the fragmentation code
 905                          * simpler by stripping LSB should someone try to use
 906                          * odd threshold value.
 907                          */
 908                         frag_threshold &= ~0x1;
 909                 }
 910                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 911         }
 912
 913         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 914                 rts_threshold = nla_get_u32(
 915                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 916                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 917         }
 918
 919         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 920                 coverage_class = nla_get_u8(
 921                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 922                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
 923         }
 924
 925         if (changed) {
 926                 u8 old_retry_short, old_retry_long;
 927                 u32 old_frag_threshold, old_rts_threshold;
 928                 u8 old_coverage_class;
 929
 930                 if (!rdev->ops->set_wiphy_params) {
 931                         result = -EOPNOTSUPP;
 932                         goto bad_res;
 933                 }
 934
 935                 old_retry_short = rdev->wiphy.retry_short;
 936                 old_retry_long = rdev->wiphy.retry_long;
 937                 old_frag_threshold = rdev->wiphy.frag_threshold;
 938                 old_rts_threshold = rdev->wiphy.rts_threshold;
 939                 old_coverage_class = rdev->wiphy.coverage_class;
 940
 941                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 942                         rdev->wiphy.retry_short = retry_short;
 943                 if (changed & WIPHY_PARAM_RETRY_LONG)
 944                         rdev->wiphy.retry_long = retry_long;
 945                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 946                         rdev->wiphy.frag_threshold = frag_threshold;
 947                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 948                         rdev->wiphy.rts_threshold = rts_threshold;
 949                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
 950                         rdev->wiphy.coverage_class = coverage_class;
 951
 952                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 953                 if (result) {
 954                         rdev->wiphy.retry_short = old_retry_short;
 955                         rdev->wiphy.retry_long = old_retry_long;
 956                         rdev->wiphy.frag_threshold = old_frag_threshold;
 957                         rdev->wiphy.rts_threshold = old_rts_threshold;
 958                         rdev->wiphy.coverage_class = old_coverage_class;
 959                 }
 960         }
 961
 962  bad_res:
 963         mutex_unlock(&rdev->mtx);
 964         if (netdev)
 965                 dev_put(netdev);
 966  unlock:
 967         rtnl_unlock();
 968         return result;
 969 }
 970
 971
 972 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 973                               struct cfg80211_registered_device *rdev,
 974                               struct net_device *dev)
 975 {
 976         void *hdr;
 977
 978         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 979         if (!hdr)
 980                 return -1;
 981
 982         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 983         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 984         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 985         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 986
 987         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 988                     rdev->devlist_generation ^
 989                         (cfg80211_rdev_list_generation << 2));
 990
 991         return genlmsg_end(msg, hdr);
 992
 993  nla_put_failure:
 994         genlmsg_cancel(msg, hdr);
 995         return -EMSGSIZE;
 996 }
 997
 998 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 999 {
1000         int wp_idx = 0;
1001         int if_idx = 0;
1002         int wp_start = cb->args[0];
1003         int if_start = cb->args[1];
1004         struct cfg80211_registered_device *rdev;
1005         struct wireless_dev *wdev;
1006
1007         mutex_lock(&cfg80211_mutex);
1008         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1009                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1010                         continue;
1011                 if (wp_idx < wp_start) {
1012                         wp_idx++;
1013                         continue;
1014                 }
1015                 if_idx = 0;
1016
1017                 mutex_lock(&rdev->devlist_mtx);
1018                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1019                         if (if_idx < if_start) {
1020                                 if_idx++;
1021                                 continue;
1022                         }
1023                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1024                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1025                                                rdev, wdev->netdev) < 0) {
1026                                 mutex_unlock(&rdev->devlist_mtx);
1027                                 goto out;
1028                         }
1029                         if_idx++;
1030                 }
1031                 mutex_unlock(&rdev->devlist_mtx);
1032
1033                 wp_idx++;
1034         }
1035  out:
1036         mutex_unlock(&cfg80211_mutex);
1037
1038         cb->args[0] = wp_idx;
1039         cb->args[1] = if_idx;
1040
1041         return skb->len;
1042 }
1043
1044 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1045 {
1046         struct sk_buff *msg;
1047         struct cfg80211_registered_device *dev;
1048         struct net_device *netdev;
1049         int err;
1050
1051         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
1052         if (err)
1053                 return err;
1054
1055         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1056         if (!msg)
1057                 goto out_err;
1058
1059         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1060                                dev, netdev) < 0)
1061                 goto out_free;
1062
1063         dev_put(netdev);
1064         cfg80211_unlock_rdev(dev);
1065
1066         return genlmsg_reply(msg, info);
1067
1068  out_free:
1069         nlmsg_free(msg);
1070  out_err:
1071         dev_put(netdev);
1072         cfg80211_unlock_rdev(dev);
1073         return -ENOBUFS;
1074 }
1075
1076 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1077         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1078         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1079         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1080         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1081         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1082 };
1083
1084 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1085 {
1086         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1087         int flag;
1088
1089         *mntrflags = 0;
1090
1091         if (!nla)
1092                 return -EINVAL;
1093
1094         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1095                              nla, mntr_flags_policy))
1096                 return -EINVAL;
1097
1098         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1099                 if (flags[flag])
1100                         *mntrflags |= (1<<flag);
1101
1102         return 0;
1103 }
1104
1105 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1106                                struct net_device *netdev, u8 use_4addr,
1107                                enum nl80211_iftype iftype)
1108 {
1109         if (!use_4addr) {
1110                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1111                         return -EBUSY;
1112                 return 0;
1113         }
1114
1115         switch (iftype) {
1116         case NL80211_IFTYPE_AP_VLAN:
1117                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1118                         return 0;
1119                 break;
1120         case NL80211_IFTYPE_STATION:
1121                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1122                         return 0;
1123                 break;
1124         default:
1125                 break;
1126         }
1127
1128         return -EOPNOTSUPP;
1129 }
1130
1131 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1132 {
1133         struct cfg80211_registered_device *rdev;
1134         struct vif_params params;
1135         int err;
1136         enum nl80211_iftype otype, ntype;
1137         struct net_device *dev;
1138         u32 _flags, *flags = NULL;
1139         bool change = false;
1140
1141         memset(&params, 0, sizeof(params));
1142
1143         rtnl_lock();
1144
1145         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1146         if (err)
1147                 goto unlock_rtnl;
1148
1149         otype = ntype = dev->ieee80211_ptr->iftype;
1150
1151         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1152                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1153                 if (otype != ntype)
1154                         change = true;
1155                 if (ntype > NL80211_IFTYPE_MAX) {
1156                         err = -EINVAL;
1157                         goto unlock;
1158                 }
1159         }
1160
1161         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1162                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1163                         err = -EINVAL;
1164                         goto unlock;
1165                 }
1166                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1167                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1168                 change = true;
1169         }
1170
1171         if (info->attrs[NL80211_ATTR_4ADDR]) {
1172                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1173                 change = true;
1174                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1175                 if (err)
1176                         goto unlock;
1177         } else {
1178                 params.use_4addr = -1;
1179         }
1180
1181         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1182                 if (ntype != NL80211_IFTYPE_MONITOR) {
1183                         err = -EINVAL;
1184                         goto unlock;
1185                 }
1186                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1187                                           &_flags);
1188                 if (err)
1189                         goto unlock;
1190
1191                 flags = &_flags;
1192                 change = true;
1193         }
1194
1195         if (change)
1196                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1197         else
1198                 err = 0;
1199
1200         if (!err && params.use_4addr != -1)
1201                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1202
1203  unlock:
1204         dev_put(dev);
1205         cfg80211_unlock_rdev(rdev);
1206  unlock_rtnl:
1207         rtnl_unlock();
1208         return err;
1209 }
1210
1211 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1212 {
1213         struct cfg80211_registered_device *rdev;
1214         struct vif_params params;
1215         int err;
1216         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1217         u32 flags;
1218
1219         memset(&params, 0, sizeof(params));
1220
1221         if (!info->attrs[NL80211_ATTR_IFNAME])
1222                 return -EINVAL;
1223
1224         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1225                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1226                 if (type > NL80211_IFTYPE_MAX)
1227                         return -EINVAL;
1228         }
1229
1230         rtnl_lock();
1231
1232         rdev = cfg80211_get_dev_from_info(info);
1233         if (IS_ERR(rdev)) {
1234                 err = PTR_ERR(rdev);
1235                 goto unlock_rtnl;
1236         }
1237
1238         if (!rdev->ops->add_virtual_intf ||
1239             !(rdev->wiphy.interface_modes & (1 << type))) {
1240                 err = -EOPNOTSUPP;
1241                 goto unlock;
1242         }
1243
1244         if (type == NL80211_IFTYPE_MESH_POINT &&
1245             info->attrs[NL80211_ATTR_MESH_ID]) {
1246                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1247                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1248         }
1249
1250         if (info->attrs[NL80211_ATTR_4ADDR]) {
1251                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1252                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1253                 if (err)
1254                         goto unlock;
1255         }
1256
1257         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1258                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1259                                   &flags);
1260         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1261                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1262                 type, err ? NULL : &flags, &params);
1263
1264  unlock:
1265         cfg80211_unlock_rdev(rdev);
1266  unlock_rtnl:
1267         rtnl_unlock();
1268         return err;
1269 }
1270
1271 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1272 {
1273         struct cfg80211_registered_device *rdev;
1274         int err;
1275         struct net_device *dev;
1276
1277         rtnl_lock();
1278
1279         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1280         if (err)
1281                 goto unlock_rtnl;
1282
1283         if (!rdev->ops->del_virtual_intf) {
1284                 err = -EOPNOTSUPP;
1285                 goto out;
1286         }
1287
1288         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1289
1290  out:
1291         cfg80211_unlock_rdev(rdev);
1292         dev_put(dev);
1293  unlock_rtnl:
1294         rtnl_unlock();
1295         return err;
1296 }
1297
1298 struct get_key_cookie {
1299         struct sk_buff *msg;
1300         int error;
1301         int idx;
1302 };
1303
1304 static void get_key_callback(void *c, struct key_params *params)
1305 {
1306         struct nlattr *key;
1307         struct get_key_cookie *cookie = c;
1308
1309         if (params->key)
1310                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1311                         params->key_len, params->key);
1312
1313         if (params->seq)
1314                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1315                         params->seq_len, params->seq);
1316
1317         if (params->cipher)
1318                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1319                             params->cipher);
1320
1321         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1322         if (!key)
1323                 goto nla_put_failure;
1324
1325         if (params->key)
1326                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1327                         params->key_len, params->key);
1328
1329         if (params->seq)
1330                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1331                         params->seq_len, params->seq);
1332
1333         if (params->cipher)
1334                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1335                             params->cipher);
1336
1337         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1338
1339         nla_nest_end(cookie->msg, key);
1340
1341         return;
1342  nla_put_failure:
1343         cookie->error = 1;
1344 }
1345
1346 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1347 {
1348         struct cfg80211_registered_device *rdev;
1349         int err;
1350         struct net_device *dev;
1351         u8 key_idx = 0;
1352         u8 *mac_addr = NULL;
1353         struct get_key_cookie cookie = {
1354                 .error = 0,
1355         };
1356         void *hdr;
1357         struct sk_buff *msg;
1358
1359         if (info->attrs[NL80211_ATTR_KEY_IDX])
1360                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1361
1362         if (key_idx > 5)
1363                 return -EINVAL;
1364
1365         if (info->attrs[NL80211_ATTR_MAC])
1366                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1367
1368         rtnl_lock();
1369
1370         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1371         if (err)
1372                 goto unlock_rtnl;
1373
1374         if (!rdev->ops->get_key) {
1375                 err = -EOPNOTSUPP;
1376                 goto out;
1377         }
1378
1379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1380         if (!msg) {
1381                 err = -ENOMEM;
1382                 goto out;
1383         }
1384
1385         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1386                              NL80211_CMD_NEW_KEY);
1387
1388         if (IS_ERR(hdr)) {
1389                 err = PTR_ERR(hdr);
1390                 goto free_msg;
1391         }
1392
1393         cookie.msg = msg;
1394         cookie.idx = key_idx;
1395
1396         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1397         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1398         if (mac_addr)
1399                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1400
1401         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1402                                 &cookie, get_key_callback);
1403
1404         if (err)
1405                 goto free_msg;
1406
1407         if (cookie.error)
1408                 goto nla_put_failure;
1409
1410         genlmsg_end(msg, hdr);
1411         err = genlmsg_reply(msg, info);
1412         goto out;
1413
1414  nla_put_failure:
1415         err = -ENOBUFS;
1416  free_msg:
1417         nlmsg_free(msg);
1418  out:
1419         cfg80211_unlock_rdev(rdev);
1420         dev_put(dev);
1421  unlock_rtnl:
1422         rtnl_unlock();
1423
1424         return err;
1425 }
1426
1427 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1428 {
1429         struct cfg80211_registered_device *rdev;
1430         struct key_parse key;
1431         int err;
1432         struct net_device *dev;
1433         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1434                     u8 key_index);
1435
1436         err = nl80211_parse_key(info, &key);
1437         if (err)
1438                 return err;
1439
1440         if (key.idx < 0)
1441                 return -EINVAL;
1442
1443         /* only support setting default key */
1444         if (!key.def && !key.defmgmt)
1445                 return -EINVAL;
1446
1447         rtnl_lock();
1448
1449         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1450         if (err)
1451                 goto unlock_rtnl;
1452
1453         if (key.def)
1454                 func = rdev->ops->set_default_key;
1455         else
1456                 func = rdev->ops->set_default_mgmt_key;
1457
1458         if (!func) {
1459                 err = -EOPNOTSUPP;
1460                 goto out;
1461         }
1462
1463         wdev_lock(dev->ieee80211_ptr);
1464         err = nl80211_key_allowed(dev->ieee80211_ptr);
1465         if (!err)
1466                 err = func(&rdev->wiphy, dev, key.idx);
1467
1468 #ifdef CONFIG_CFG80211_WEXT
1469         if (!err) {
1470                 if (func == rdev->ops->set_default_key)
1471                         dev->ieee80211_ptr->wext.default_key = key.idx;
1472                 else
1473                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1474         }
1475 #endif
1476         wdev_unlock(dev->ieee80211_ptr);
1477
1478  out:
1479         cfg80211_unlock_rdev(rdev);
1480         dev_put(dev);
1481
1482  unlock_rtnl:
1483         rtnl_unlock();
1484
1485         return err;
1486 }
1487
1488 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1489 {
1490         struct cfg80211_registered_device *rdev;
1491         int err;
1492         struct net_device *dev;
1493         struct key_parse key;
1494         u8 *mac_addr = NULL;
1495
1496         err = nl80211_parse_key(info, &key);
1497         if (err)
1498                 return err;
1499
1500         if (!key.p.key)
1501                 return -EINVAL;
1502
1503         if (info->attrs[NL80211_ATTR_MAC])
1504                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1505
1506         rtnl_lock();
1507
1508         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1509         if (err)
1510                 goto unlock_rtnl;
1511
1512         if (!rdev->ops->add_key) {
1513                 err = -EOPNOTSUPP;
1514                 goto out;
1515         }
1516
1517         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1518                 err = -EINVAL;
1519                 goto out;
1520         }
1521
1522         wdev_lock(dev->ieee80211_ptr);
1523         err = nl80211_key_allowed(dev->ieee80211_ptr);
1524         if (!err)
1525                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1526                                          mac_addr, &key.p);
1527         wdev_unlock(dev->ieee80211_ptr);
1528
1529  out:
1530         cfg80211_unlock_rdev(rdev);
1531         dev_put(dev);
1532  unlock_rtnl:
1533         rtnl_unlock();
1534
1535         return err;
1536 }
1537
1538 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1539 {
1540         struct cfg80211_registered_device *rdev;
1541         int err;
1542         struct net_device *dev;
1543         u8 *mac_addr = NULL;
1544         struct key_parse key;
1545
1546         err = nl80211_parse_key(info, &key);
1547         if (err)
1548                 return err;
1549
1550         if (info->attrs[NL80211_ATTR_MAC])
1551                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1552
1553         rtnl_lock();
1554
1555         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1556         if (err)
1557                 goto unlock_rtnl;
1558
1559         if (!rdev->ops->del_key) {
1560                 err = -EOPNOTSUPP;
1561                 goto out;
1562         }
1563
1564         wdev_lock(dev->ieee80211_ptr);
1565         err = nl80211_key_allowed(dev->ieee80211_ptr);
1566         if (!err)
1567                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1568
1569 #ifdef CONFIG_CFG80211_WEXT
1570         if (!err) {
1571                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1572                         dev->ieee80211_ptr->wext.default_key = -1;
1573                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1574                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1575         }
1576 #endif
1577         wdev_unlock(dev->ieee80211_ptr);
1578
1579  out:
1580         cfg80211_unlock_rdev(rdev);
1581         dev_put(dev);
1582
1583  unlock_rtnl:
1584         rtnl_unlock();
1585
1586         return err;
1587 }
1588
1589 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1590 {
1591         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1592                     struct beacon_parameters *info);
1593         struct cfg80211_registered_device *rdev;
1594         int err;
1595         struct net_device *dev;
1596         struct beacon_parameters params;
1597         int haveinfo = 0;
1598
1599         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1600                 return -EINVAL;
1601
1602         rtnl_lock();
1603
1604         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1605         if (err)
1606                 goto unlock_rtnl;
1607
1608         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1609                 err = -EOPNOTSUPP;
1610                 goto out;
1611         }
1612
1613         switch (info->genlhdr->cmd) {
1614         case NL80211_CMD_NEW_BEACON:
1615                 /* these are required for NEW_BEACON */
1616                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1617                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1618                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1619                         err = -EINVAL;
1620                         goto out;
1621                 }
1622
1623                 call = rdev->ops->add_beacon;
1624                 break;
1625         case NL80211_CMD_SET_BEACON:
1626                 call = rdev->ops->set_beacon;
1627                 break;
1628         default:
1629                 WARN_ON(1);
1630                 err = -EOPNOTSUPP;
1631                 goto out;
1632         }
1633
1634         if (!call) {
1635                 err = -EOPNOTSUPP;
1636                 goto out;
1637         }
1638
1639         memset(&params, 0, sizeof(params));
1640
1641         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1642                 params.interval =
1643                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1644                 haveinfo = 1;
1645         }
1646
1647         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1648                 params.dtim_period =
1649                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1650                 haveinfo = 1;
1651         }
1652
1653         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1654                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1655                 params.head_len =
1656                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1657                 haveinfo = 1;
1658         }
1659
1660         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1661                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1662                 params.tail_len =
1663                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1664                 haveinfo = 1;
1665         }
1666
1667         if (!haveinfo) {
1668                 err = -EINVAL;
1669                 goto out;
1670         }
1671
1672         err = call(&rdev->wiphy, dev, &params);
1673
1674  out:
1675         cfg80211_unlock_rdev(rdev);
1676         dev_put(dev);
1677  unlock_rtnl:
1678         rtnl_unlock();
1679
1680         return err;
1681 }
1682
1683 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1684 {
1685         struct cfg80211_registered_device *rdev;
1686         int err;
1687         struct net_device *dev;
1688
1689         rtnl_lock();
1690
1691         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1692         if (err)
1693                 goto unlock_rtnl;
1694
1695         if (!rdev->ops->del_beacon) {
1696                 err = -EOPNOTSUPP;
1697                 goto out;
1698         }
1699
1700         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1701                 err = -EOPNOTSUPP;
1702                 goto out;
1703         }
1704         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1705
1706  out:
1707         cfg80211_unlock_rdev(rdev);
1708         dev_put(dev);
1709  unlock_rtnl:
1710         rtnl_unlock();
1711
1712         return err;
1713 }
1714
1715 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1716         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1717         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1718         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1719         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1720 };
1721
1722 static int parse_station_flags(struct genl_info *info,
1723                                struct station_parameters *params)
1724 {
1725         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1726         struct nlattr *nla;
1727         int flag;
1728
1729         /*
1730          * Try parsing the new attribute first so userspace
1731          * can specify both for older kernels.
1732          */
1733         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1734         if (nla) {
1735                 struct nl80211_sta_flag_update *sta_flags;
1736
1737                 sta_flags = nla_data(nla);
1738                 params->sta_flags_mask = sta_flags->mask;
1739                 params->sta_flags_set = sta_flags->set;
1740                 if ((params->sta_flags_mask |
1741                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1742                         return -EINVAL;
1743                 return 0;
1744         }
1745
1746         /* if present, parse the old attribute */
1747
1748         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1749         if (!nla)
1750                 return 0;
1751
1752         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1753                              nla, sta_flags_policy))
1754                 return -EINVAL;
1755
1756         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1757         params->sta_flags_mask &= ~1;
1758
1759         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1760                 if (flags[flag])
1761                         params->sta_flags_set |= (1<<flag);
1762
1763         return 0;
1764 }
1765
1766 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1767                                 int flags, struct net_device *dev,
1768                                 const u8 *mac_addr, struct station_info *sinfo)
1769 {
1770         void *hdr;
1771         struct nlattr *sinfoattr, *txrate;
1772         u16 bitrate;
1773
1774         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1775         if (!hdr)
1776                 return -1;
1777
1778         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1779         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1780
1781         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1782
1783         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1784         if (!sinfoattr)
1785                 goto nla_put_failure;
1786         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1787                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1788                             sinfo->inactive_time);
1789         if (sinfo->filled & STATION_INFO_RX_BYTES)
1790                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1791                             sinfo->rx_bytes);
1792         if (sinfo->filled & STATION_INFO_TX_BYTES)
1793                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1794                             sinfo->tx_bytes);
1795         if (sinfo->filled & STATION_INFO_LLID)
1796                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1797                             sinfo->llid);
1798         if (sinfo->filled & STATION_INFO_PLID)
1799                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1800                             sinfo->plid);
1801         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1802                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1803                             sinfo->plink_state);
1804         if (sinfo->filled & STATION_INFO_SIGNAL)
1805                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1806                            sinfo->signal);
1807         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1808                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1809                 if (!txrate)
1810                         goto nla_put_failure;
1811
1812                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1813                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1814                 if (bitrate > 0)
1815                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1816
1817                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1818                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1819                                     sinfo->txrate.mcs);
1820                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1821                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1822                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1823                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1824
1825                 nla_nest_end(msg, txrate);
1826         }
1827         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1828                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1829                             sinfo->rx_packets);
1830         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1831                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1832                             sinfo->tx_packets);
1833         nla_nest_end(msg, sinfoattr);
1834
1835         return genlmsg_end(msg, hdr);
1836
1837  nla_put_failure:
1838         genlmsg_cancel(msg, hdr);
1839         return -EMSGSIZE;
1840 }
1841
1842 static int nl80211_dump_station(struct sk_buff *skb,
1843                                 struct netlink_callback *cb)
1844 {
1845         struct station_info sinfo;
1846         struct cfg80211_registered_device *dev;
1847         struct net_device *netdev;
1848         u8 mac_addr[ETH_ALEN];
1849         int ifidx = cb->args[0];
1850         int sta_idx = cb->args[1];
1851         int err;
1852
1853         if (!ifidx)
1854                 ifidx = nl80211_get_ifidx(cb);
1855         if (ifidx < 0)
1856                 return ifidx;
1857
1858         rtnl_lock();
1859
1860         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1861         if (!netdev) {
1862                 err = -ENODEV;
1863                 goto out_rtnl;
1864         }
1865
1866         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1867         if (IS_ERR(dev)) {
1868                 err = PTR_ERR(dev);
1869                 goto out_rtnl;
1870         }
1871
1872         if (!dev->ops->dump_station) {
1873                 err = -EOPNOTSUPP;
1874                 goto out_err;
1875         }
1876
1877         while (1) {
1878                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1879                                              mac_addr, &sinfo);
1880                 if (err == -ENOENT)
1881                         break;
1882                 if (err)
1883                         goto out_err;
1884
1885                 if (nl80211_send_station(skb,
1886                                 NETLINK_CB(cb->skb).pid,
1887                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1888                                 netdev, mac_addr,
1889                                 &sinfo) < 0)
1890                         goto out;
1891
1892                 sta_idx++;
1893         }
1894
1895
1896  out:
1897         cb->args[1] = sta_idx;
1898         err = skb->len;
1899  out_err:
1900         cfg80211_unlock_rdev(dev);
1901  out_rtnl:
1902         rtnl_unlock();
1903
1904         return err;
1905 }
1906
1907 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1908 {
1909         struct cfg80211_registered_device *rdev;
1910         int err;
1911         struct net_device *dev;
1912         struct station_info sinfo;
1913         struct sk_buff *msg;
1914         u8 *mac_addr = NULL;
1915
1916         memset(&sinfo, 0, sizeof(sinfo));
1917
1918         if (!info->attrs[NL80211_ATTR_MAC])
1919                 return -EINVAL;
1920
1921         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1922
1923         rtnl_lock();
1924
1925         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1926         if (err)
1927                 goto out_rtnl;
1928
1929         if (!rdev->ops->get_station) {
1930                 err = -EOPNOTSUPP;
1931                 goto out;
1932         }
1933
1934         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1935         if (err)
1936                 goto out;
1937
1938         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1939         if (!msg)
1940                 goto out;
1941
1942         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1943                                  dev, mac_addr, &sinfo) < 0)
1944                 goto out_free;
1945
1946         err = genlmsg_reply(msg, info);
1947         goto out;
1948
1949  out_free:
1950         nlmsg_free(msg);
1951  out:
1952         cfg80211_unlock_rdev(rdev);
1953         dev_put(dev);
1954  out_rtnl:
1955         rtnl_unlock();
1956
1957         return err;
1958 }
1959
1960 /*
1961  * Get vlan interface making sure it is running and on the right wiphy.
1962  */
1963 static int get_vlan(struct genl_info *info,
1964                     struct cfg80211_registered_device *rdev,
1965                     struct net_device **vlan)
1966 {
1967         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1968         *vlan = NULL;
1969
1970         if (vlanattr) {
1971                 *vlan = dev_get_by_index(genl_info_net(info),
1972                                          nla_get_u32(vlanattr));
1973                 if (!*vlan)
1974                         return -ENODEV;
1975                 if (!(*vlan)->ieee80211_ptr)
1976                         return -EINVAL;
1977                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1978                         return -EINVAL;
1979                 if (!netif_running(*vlan))
1980                         return -ENETDOWN;
1981         }
1982         return 0;
1983 }
1984
1985 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1986 {
1987         struct cfg80211_registered_device *rdev;
1988         int err;
1989         struct net_device *dev;
1990         struct station_parameters params;
1991         u8 *mac_addr = NULL;
1992
1993         memset(&params, 0, sizeof(params));
1994
1995         params.listen_interval = -1;
1996
1997         if (info->attrs[NL80211_ATTR_STA_AID])
1998                 return -EINVAL;
1999
2000         if (!info->attrs[NL80211_ATTR_MAC])
2001                 return -EINVAL;
2002
2003         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2004
2005         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2006                 params.supported_rates =
2007                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2008                 params.supported_rates_len =
2009                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2010         }
2011
2012         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2013                 params.listen_interval =
2014                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2015
2016         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2017                 params.ht_capa =
2018                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2019
2020         if (parse_station_flags(info, &params))
2021                 return -EINVAL;
2022
2023         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2024                 params.plink_action =
2025                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2026
2027         rtnl_lock();
2028
2029         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2030         if (err)
2031                 goto out_rtnl;
2032
2033         err = get_vlan(info, rdev, &params.vlan);
2034         if (err)
2035                 goto out;
2036
2037         /* validate settings */
2038         err = 0;
2039
2040         switch (dev->ieee80211_ptr->iftype) {
2041         case NL80211_IFTYPE_AP:
2042         case NL80211_IFTYPE_AP_VLAN:
2043                 /* disallow mesh-specific things */
2044                 if (params.plink_action)
2045                         err = -EINVAL;
2046                 break;
2047         case NL80211_IFTYPE_STATION:
2048                 /* disallow everything but AUTHORIZED flag */
2049                 if (params.plink_action)
2050                         err = -EINVAL;
2051                 if (params.vlan)
2052                         err = -EINVAL;
2053                 if (params.supported_rates)
2054                         err = -EINVAL;
2055                 if (params.ht_capa)
2056                         err = -EINVAL;
2057                 if (params.listen_interval >= 0)
2058                         err = -EINVAL;
2059                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2060                         err = -EINVAL;
2061                 break;
2062         case NL80211_IFTYPE_MESH_POINT:
2063                 /* disallow things mesh doesn't support */
2064                 if (params.vlan)
2065                         err = -EINVAL;
2066                 if (params.ht_capa)
2067                         err = -EINVAL;
2068                 if (params.listen_interval >= 0)
2069                         err = -EINVAL;
2070                 if (params.supported_rates)
2071                         err = -EINVAL;
2072                 if (params.sta_flags_mask)
2073                         err = -EINVAL;
2074                 break;
2075         default:
2076                 err = -EINVAL;
2077         }
2078
2079         if (err)
2080                 goto out;
2081
2082         if (!rdev->ops->change_station) {
2083                 err = -EOPNOTSUPP;
2084                 goto out;
2085         }
2086
2087         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2088
2089  out:
2090         if (params.vlan)
2091                 dev_put(params.vlan);
2092         cfg80211_unlock_rdev(rdev);
2093         dev_put(dev);
2094  out_rtnl:
2095         rtnl_unlock();
2096
2097         return err;
2098 }
2099
2100 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2101 {
2102         struct cfg80211_registered_device *rdev;
2103         int err;
2104         struct net_device *dev;
2105         struct station_parameters params;
2106         u8 *mac_addr = NULL;
2107
2108         memset(&params, 0, sizeof(params));
2109
2110         if (!info->attrs[NL80211_ATTR_MAC])
2111                 return -EINVAL;
2112
2113         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2114                 return -EINVAL;
2115
2116         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2117                 return -EINVAL;
2118
2119         if (!info->attrs[NL80211_ATTR_STA_AID])
2120                 return -EINVAL;
2121
2122         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2123         params.supported_rates =
2124                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2125         params.supported_rates_len =
2126                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2127         params.listen_interval =
2128                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2129
2130         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2131         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2132                 return -EINVAL;
2133
2134         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2135                 params.ht_capa =
2136                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2137
2138         if (parse_station_flags(info, &params))
2139                 return -EINVAL;
2140
2141         rtnl_lock();
2142
2143         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2144         if (err)
2145                 goto out_rtnl;
2146
2147         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2148             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2149                 err = -EINVAL;
2150                 goto out;
2151         }
2152
2153         err = get_vlan(info, rdev, &params.vlan);
2154         if (err)
2155                 goto out;
2156
2157         /* validate settings */
2158         err = 0;
2159
2160         if (!rdev->ops->add_station) {
2161                 err = -EOPNOTSUPP;
2162                 goto out;
2163         }
2164
2165         if (!netif_running(dev)) {
2166                 err = -ENETDOWN;
2167                 goto out;
2168         }
2169
2170         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2171
2172  out:
2173         if (params.vlan)
2174                 dev_put(params.vlan);
2175         cfg80211_unlock_rdev(rdev);
2176         dev_put(dev);
2177  out_rtnl:
2178         rtnl_unlock();
2179
2180         return err;
2181 }
2182
2183 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2184 {
2185         struct cfg80211_registered_device *rdev;
2186         int err;
2187         struct net_device *dev;
2188         u8 *mac_addr = NULL;
2189
2190         if (info->attrs[NL80211_ATTR_MAC])
2191                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2192
2193         rtnl_lock();
2194
2195         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2196         if (err)
2197                 goto out_rtnl;
2198
2199         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2200             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2201             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2202                 err = -EINVAL;
2203                 goto out;
2204         }
2205
2206         if (!rdev->ops->del_station) {
2207                 err = -EOPNOTSUPP;
2208                 goto out;
2209         }
2210
2211         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2212
2213  out:
2214         cfg80211_unlock_rdev(rdev);
2215         dev_put(dev);
2216  out_rtnl:
2217         rtnl_unlock();
2218
2219         return err;
2220 }
2221
2222 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2223                                 int flags, struct net_device *dev,
2224                                 u8 *dst, u8 *next_hop,
2225                                 struct mpath_info *pinfo)
2226 {
2227         void *hdr;
2228         struct nlattr *pinfoattr;
2229
2230         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2231         if (!hdr)
2232                 return -1;
2233
2234         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2235         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2236         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2237
2238         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2239
2240         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2241         if (!pinfoattr)
2242                 goto nla_put_failure;
2243         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2244                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2245                             pinfo->frame_qlen);
2246         if (pinfo->filled & MPATH_INFO_SN)
2247                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2248                             pinfo->sn);
2249         if (pinfo->filled & MPATH_INFO_METRIC)
2250                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2251                             pinfo->metric);
2252         if (pinfo->filled & MPATH_INFO_EXPTIME)
2253                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2254                             pinfo->exptime);
2255         if (pinfo->filled & MPATH_INFO_FLAGS)
2256                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2257                             pinfo->flags);
2258         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2259                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2260                             pinfo->discovery_timeout);
2261         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2262                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2263                             pinfo->discovery_retries);
2264
2265         nla_nest_end(msg, pinfoattr);
2266
2267         return genlmsg_end(msg, hdr);
2268
2269  nla_put_failure:
2270         genlmsg_cancel(msg, hdr);
2271         return -EMSGSIZE;
2272 }
2273
2274 static int nl80211_dump_mpath(struct sk_buff *skb,
2275                               struct netlink_callback *cb)
2276 {
2277         struct mpath_info pinfo;
2278         struct cfg80211_registered_device *dev;
2279         struct net_device *netdev;
2280         u8 dst[ETH_ALEN];
2281         u8 next_hop[ETH_ALEN];
2282         int ifidx = cb->args[0];
2283         int path_idx = cb->args[1];
2284         int err;
2285
2286         if (!ifidx)
2287                 ifidx = nl80211_get_ifidx(cb);
2288         if (ifidx < 0)
2289                 return ifidx;
2290
2291         rtnl_lock();
2292
2293         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2294         if (!netdev) {
2295                 err = -ENODEV;
2296                 goto out_rtnl;
2297         }
2298
2299         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2300         if (IS_ERR(dev)) {
2301                 err = PTR_ERR(dev);
2302                 goto out_rtnl;
2303         }
2304
2305         if (!dev->ops->dump_mpath) {
2306                 err = -EOPNOTSUPP;
2307                 goto out_err;
2308         }
2309
2310         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2311                 err = -EOPNOTSUPP;
2312                 goto out_err;
2313         }
2314
2315         while (1) {
2316                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2317                                            dst, next_hop, &pinfo);
2318                 if (err == -ENOENT)
2319                         break;
2320                 if (err)
2321                         goto out_err;
2322
2323                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2324                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2325                                        netdev, dst, next_hop,
2326                                        &pinfo) < 0)
2327                         goto out;
2328
2329                 path_idx++;
2330         }
2331
2332
2333  out:
2334         cb->args[1] = path_idx;
2335         err = skb->len;
2336  out_err:
2337         cfg80211_unlock_rdev(dev);
2338  out_rtnl:
2339         rtnl_unlock();
2340
2341         return err;
2342 }
2343
2344 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2345 {
2346         struct cfg80211_registered_device *rdev;
2347         int err;
2348         struct net_device *dev;
2349         struct mpath_info pinfo;
2350         struct sk_buff *msg;
2351         u8 *dst = NULL;
2352         u8 next_hop[ETH_ALEN];
2353
2354         memset(&pinfo, 0, sizeof(pinfo));
2355
2356         if (!info->attrs[NL80211_ATTR_MAC])
2357                 return -EINVAL;
2358
2359         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2360
2361         rtnl_lock();
2362
2363         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2364         if (err)
2365                 goto out_rtnl;
2366
2367         if (!rdev->ops->get_mpath) {
2368                 err = -EOPNOTSUPP;
2369                 goto out;
2370         }
2371
2372         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2373                 err = -EOPNOTSUPP;
2374                 goto out;
2375         }
2376
2377         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2378         if (err)
2379                 goto out;
2380
2381         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2382         if (!msg)
2383                 goto out;
2384
2385         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2386                                  dev, dst, next_hop, &pinfo) < 0)
2387                 goto out_free;
2388
2389         err = genlmsg_reply(msg, info);
2390         goto out;
2391
2392  out_free:
2393         nlmsg_free(msg);
2394  out:
2395         cfg80211_unlock_rdev(rdev);
2396         dev_put(dev);
2397  out_rtnl:
2398         rtnl_unlock();
2399
2400         return err;
2401 }
2402
2403 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2404 {
2405         struct cfg80211_registered_device *rdev;
2406         int err;
2407         struct net_device *dev;
2408         u8 *dst = NULL;
2409         u8 *next_hop = NULL;
2410
2411         if (!info->attrs[NL80211_ATTR_MAC])
2412                 return -EINVAL;
2413
2414         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2415                 return -EINVAL;
2416
2417         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2418         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2419
2420         rtnl_lock();
2421
2422         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2423         if (err)
2424                 goto out_rtnl;
2425
2426         if (!rdev->ops->change_mpath) {
2427                 err = -EOPNOTSUPP;
2428                 goto out;
2429         }
2430
2431         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2432                 err = -EOPNOTSUPP;
2433                 goto out;
2434         }
2435
2436         if (!netif_running(dev)) {
2437                 err = -ENETDOWN;
2438                 goto out;
2439         }
2440
2441         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2442
2443  out:
2444         cfg80211_unlock_rdev(rdev);
2445         dev_put(dev);
2446  out_rtnl:
2447         rtnl_unlock();
2448
2449         return err;
2450 }
2451 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2452 {
2453         struct cfg80211_registered_device *rdev;
2454         int err;
2455         struct net_device *dev;
2456         u8 *dst = NULL;
2457         u8 *next_hop = NULL;
2458
2459         if (!info->attrs[NL80211_ATTR_MAC])
2460                 return -EINVAL;
2461
2462         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2463                 return -EINVAL;
2464
2465         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2466         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2467
2468         rtnl_lock();
2469
2470         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2471         if (err)
2472                 goto out_rtnl;
2473
2474         if (!rdev->ops->add_mpath) {
2475                 err = -EOPNOTSUPP;
2476                 goto out;
2477         }
2478
2479         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2480                 err = -EOPNOTSUPP;
2481                 goto out;
2482         }
2483
2484         if (!netif_running(dev)) {
2485                 err = -ENETDOWN;
2486                 goto out;
2487         }
2488
2489         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2490
2491  out:
2492         cfg80211_unlock_rdev(rdev);
2493         dev_put(dev);
2494  out_rtnl:
2495         rtnl_unlock();
2496
2497         return err;
2498 }
2499
2500 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2501 {
2502         struct cfg80211_registered_device *rdev;
2503         int err;
2504         struct net_device *dev;
2505         u8 *dst = NULL;
2506
2507         if (info->attrs[NL80211_ATTR_MAC])
2508                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2509
2510         rtnl_lock();
2511
2512         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2513         if (err)
2514                 goto out_rtnl;
2515
2516         if (!rdev->ops->del_mpath) {
2517                 err = -EOPNOTSUPP;
2518                 goto out;
2519         }
2520
2521         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2522
2523  out:
2524         cfg80211_unlock_rdev(rdev);
2525         dev_put(dev);
2526  out_rtnl:
2527         rtnl_unlock();
2528
2529         return err;
2530 }
2531
2532 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2533 {
2534         struct cfg80211_registered_device *rdev;
2535         int err;
2536         struct net_device *dev;
2537         struct bss_parameters params;
2538
2539         memset(&params, 0, sizeof(params));
2540         /* default to not changing parameters */
2541         params.use_cts_prot = -1;
2542         params.use_short_preamble = -1;
2543         params.use_short_slot_time = -1;
2544         params.ap_isolate = -1;
2545
2546         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2547                 params.use_cts_prot =
2548                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2549         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2550                 params.use_short_preamble =
2551                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2552         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2553                 params.use_short_slot_time =
2554                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2555         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2556                 params.basic_rates =
2557                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2558                 params.basic_rates_len =
2559                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2560         }
2561         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2562                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2563
2564         rtnl_lock();
2565
2566         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2567         if (err)
2568                 goto out_rtnl;
2569
2570         if (!rdev->ops->change_bss) {
2571                 err = -EOPNOTSUPP;
2572                 goto out;
2573         }
2574
2575         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2576                 err = -EOPNOTSUPP;
2577                 goto out;
2578         }
2579
2580         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2581
2582  out:
2583         cfg80211_unlock_rdev(rdev);
2584         dev_put(dev);
2585  out_rtnl:
2586         rtnl_unlock();
2587
2588         return err;
2589 }
2590
2591 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2592         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2593         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2594         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2595         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2596         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2597         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2598 };
2599
2600 static int parse_reg_rule(struct nlattr *tb[],
2601         struct ieee80211_reg_rule *reg_rule)
2602 {
2603         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2604         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2605
2606         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2607                 return -EINVAL;
2608         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2609                 return -EINVAL;
2610         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2611                 return -EINVAL;
2612         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2613                 return -EINVAL;
2614         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2615                 return -EINVAL;
2616
2617         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2618
2619         freq_range->start_freq_khz =
2620                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2621         freq_range->end_freq_khz =
2622                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2623         freq_range->max_bandwidth_khz =
2624                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2625
2626         power_rule->max_eirp =
2627                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2628
2629         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2630                 power_rule->max_antenna_gain =
2631                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2632
2633         return 0;
2634 }
2635
2636 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2637 {
2638         int r;
2639         char *data = NULL;
2640
2641         /*
2642          * You should only get this when cfg80211 hasn't yet initialized
2643          * completely when built-in to the kernel right between the time
2644          * window between nl80211_init() and regulatory_init(), if that is
2645          * even possible.
2646          */
2647         mutex_lock(&cfg80211_mutex);
2648         if (unlikely(!cfg80211_regdomain)) {
2649                 mutex_unlock(&cfg80211_mutex);
2650                 return -EINPROGRESS;
2651         }
2652         mutex_unlock(&cfg80211_mutex);
2653
2654         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2655                 return -EINVAL;
2656
2657         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2658
2659         r = regulatory_hint_user(data);
2660
2661         return r;
2662 }
2663
2664 static int nl80211_get_mesh_params(struct sk_buff *skb,
2665         struct genl_info *info)
2666 {
2667         struct cfg80211_registered_device *rdev;
2668         struct mesh_config cur_params;
2669         int err;
2670         struct net_device *dev;
2671         void *hdr;
2672         struct nlattr *pinfoattr;
2673         struct sk_buff *msg;
2674
2675         rtnl_lock();
2676
2677         /* Look up our device */
2678         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2679         if (err)
2680                 goto out_rtnl;
2681
2682         if (!rdev->ops->get_mesh_params) {
2683                 err = -EOPNOTSUPP;
2684                 goto out;
2685         }
2686
2687         /* Get the mesh params */
2688         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2689         if (err)
2690                 goto out;
2691
2692         /* Draw up a netlink message to send back */
2693         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2694         if (!msg) {
2695                 err = -ENOBUFS;
2696                 goto out;
2697         }
2698         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2699                              NL80211_CMD_GET_MESH_PARAMS);
2700         if (!hdr)
2701                 goto nla_put_failure;
2702         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2703         if (!pinfoattr)
2704                 goto nla_put_failure;
2705         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2706         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2707                         cur_params.dot11MeshRetryTimeout);
2708         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2709                         cur_params.dot11MeshConfirmTimeout);
2710         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2711                         cur_params.dot11MeshHoldingTimeout);
2712         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2713                         cur_params.dot11MeshMaxPeerLinks);
2714         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2715                         cur_params.dot11MeshMaxRetries);
2716         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2717                         cur_params.dot11MeshTTL);
2718         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2719                         cur_params.auto_open_plinks);
2720         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2721                         cur_params.dot11MeshHWMPmaxPREQretries);
2722         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2723                         cur_params.path_refresh_time);
2724         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2725                         cur_params.min_discovery_timeout);
2726         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2727                         cur_params.dot11MeshHWMPactivePathTimeout);
2728         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2729                         cur_params.dot11MeshHWMPpreqMinInterval);
2730         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2731                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2732         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2733                         cur_params.dot11MeshHWMPRootMode);
2734         nla_nest_end(msg, pinfoattr);
2735         genlmsg_end(msg, hdr);
2736         err = genlmsg_reply(msg, info);
2737         goto out;
2738
2739  nla_put_failure:
2740         genlmsg_cancel(msg, hdr);
2741         err = -EMSGSIZE;
2742  out:
2743         /* Cleanup */
2744         cfg80211_unlock_rdev(rdev);
2745         dev_put(dev);
2746  out_rtnl:
2747         rtnl_unlock();
2748
2749         return err;
2750 }
2751
2752 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2753 do {\
2754         if (table[attr_num]) {\
2755                 cfg.param = nla_fn(table[attr_num]); \
2756                 mask |= (1 << (attr_num - 1)); \
2757         } \
2758 } while (0);\
2759
2760 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2761         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2762         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2763         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2764         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2765         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2766         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2767         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2768
2769         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2770         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2771         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2772         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2773         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2774         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2775 };
2776
2777 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2778 {
2779         int err;
2780         u32 mask;
2781         struct cfg80211_registered_device *rdev;
2782         struct net_device *dev;
2783         struct mesh_config cfg;
2784         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2785         struct nlattr *parent_attr;
2786
2787         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2788         if (!parent_attr)
2789                 return -EINVAL;
2790         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2791                         parent_attr, nl80211_meshconf_params_policy))
2792                 return -EINVAL;
2793
2794         rtnl_lock();
2795
2796         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2797         if (err)
2798                 goto out_rtnl;
2799
2800         if (!rdev->ops->set_mesh_params) {
2801                 err = -EOPNOTSUPP;
2802                 goto out;
2803         }
2804
2805         /* This makes sure that there aren't more than 32 mesh config
2806          * parameters (otherwise our bitfield scheme would not work.) */
2807         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2808
2809         /* Fill in the params struct */
2810         mask = 0;
2811         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2812                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2813         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2814                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2815         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2816                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2817         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2818                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2819         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2820                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2821         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2822                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2823         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2824                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2825         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2826                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2827                         nla_get_u8);
2828         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2829                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2831                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2832                         nla_get_u16);
2833         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2834                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2835                         nla_get_u32);
2836         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2837                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2838                         nla_get_u16);
2839         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2840                         dot11MeshHWMPnetDiameterTraversalTime,
2841                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2842                         nla_get_u16);
2843         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2844                         dot11MeshHWMPRootMode, mask,
2845                         NL80211_MESHCONF_HWMP_ROOTMODE,
2846                         nla_get_u8);
2847
2848         /* Apply changes */
2849         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2850
2851  out:
2852         /* cleanup */
2853         cfg80211_unlock_rdev(rdev);
2854         dev_put(dev);
2855  out_rtnl:
2856         rtnl_unlock();
2857
2858         return err;
2859 }
2860
2861 #undef FILL_IN_MESH_PARAM_IF_SET
2862
2863 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2864 {
2865         struct sk_buff *msg;
2866         void *hdr = NULL;
2867         struct nlattr *nl_reg_rules;
2868         unsigned int i;
2869         int err = -EINVAL;
2870
2871         mutex_lock(&cfg80211_mutex);
2872
2873         if (!cfg80211_regdomain)
2874                 goto out;
2875
2876         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2877         if (!msg) {
2878                 err = -ENOBUFS;
2879                 goto out;
2880         }
2881
2882         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2883                              NL80211_CMD_GET_REG);
2884         if (!hdr)
2885                 goto nla_put_failure;
2886
2887         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2888                 cfg80211_regdomain->alpha2);
2889
2890         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2891         if (!nl_reg_rules)
2892                 goto nla_put_failure;
2893
2894         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2895                 struct nlattr *nl_reg_rule;
2896                 const struct ieee80211_reg_rule *reg_rule;
2897                 const struct ieee80211_freq_range *freq_range;
2898                 const struct ieee80211_power_rule *power_rule;
2899
2900                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2901                 freq_range = &reg_rule->freq_range;
2902                 power_rule = &reg_rule->power_rule;
2903
2904                 nl_reg_rule = nla_nest_start(msg, i);
2905                 if (!nl_reg_rule)
2906                         goto nla_put_failure;
2907
2908                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2909                         reg_rule->flags);
2910                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2911                         freq_range->start_freq_khz);
2912                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2913                         freq_range->end_freq_khz);
2914                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2915                         freq_range->max_bandwidth_khz);
2916                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2917                         power_rule->max_antenna_gain);
2918                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2919                         power_rule->max_eirp);
2920
2921                 nla_nest_end(msg, nl_reg_rule);
2922         }
2923
2924         nla_nest_end(msg, nl_reg_rules);
2925
2926         genlmsg_end(msg, hdr);
2927         err = genlmsg_reply(msg, info);
2928         goto out;
2929
2930 nla_put_failure:
2931         genlmsg_cancel(msg, hdr);
2932         err = -EMSGSIZE;
2933 out:
2934         mutex_unlock(&cfg80211_mutex);
2935         return err;
2936 }
2937
2938 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2939 {
2940         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2941         struct nlattr *nl_reg_rule;
2942         char *alpha2 = NULL;
2943         int rem_reg_rules = 0, r = 0;
2944         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2945         struct ieee80211_regdomain *rd = NULL;
2946
2947         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2948                 return -EINVAL;
2949
2950         if (!info->attrs[NL80211_ATTR_REG_RULES])
2951                 return -EINVAL;
2952
2953         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2954
2955         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2956                         rem_reg_rules) {
2957                 num_rules++;
2958                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2959                         return -EINVAL;
2960         }
2961
2962         mutex_lock(&cfg80211_mutex);
2963
2964         if (!reg_is_valid_request(alpha2)) {
2965                 r = -EINVAL;
2966                 goto bad_reg;
2967         }
2968
2969         size_of_regd = sizeof(struct ieee80211_regdomain) +
2970                 (num_rules * sizeof(struct ieee80211_reg_rule));
2971
2972         rd = kzalloc(size_of_regd, GFP_KERNEL);
2973         if (!rd) {
2974                 r = -ENOMEM;
2975                 goto bad_reg;
2976         }
2977
2978         rd->n_reg_rules = num_rules;
2979         rd->alpha2[0] = alpha2[0];
2980         rd->alpha2[1] = alpha2[1];
2981
2982         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2983                         rem_reg_rules) {
2984                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2985                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2986                         reg_rule_policy);
2987                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2988                 if (r)
2989                         goto bad_reg;
2990
2991                 rule_idx++;
2992
2993                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2994                         r = -EINVAL;
2995                         goto bad_reg;
2996                 }
2997         }
2998
2999         BUG_ON(rule_idx != num_rules);
3000
3001         r = set_regdom(rd);
3002
3003         mutex_unlock(&cfg80211_mutex);
3004
3005         return r;
3006
3007  bad_reg:
3008         mutex_unlock(&cfg80211_mutex);
3009         kfree(rd);
3010         return r;
3011 }
3012
3013 static int validate_scan_freqs(struct nlattr *freqs)
3014 {
3015         struct nlattr *attr1, *attr2;
3016         int n_channels = 0, tmp1, tmp2;
3017
3018         nla_for_each_nested(attr1, freqs, tmp1) {
3019                 n_channels++;
3020                 /*
3021                  * Some hardware has a limited channel list for
3022                  * scanning, and it is pretty much nonsensical
3023                  * to scan for a channel twice, so disallow that
3024                  * and don't require drivers to check that the
3025                  * channel list they get isn't longer than what
3026                  * they can scan, as long as they can scan all
3027                  * the channels they registered at once.
3028                  */
3029                 nla_for_each_nested(attr2, freqs, tmp2)
3030                         if (attr1 != attr2 &&
3031                             nla_get_u32(attr1) == nla_get_u32(attr2))
3032                                 return 0;
3033         }
3034
3035         return n_channels;
3036 }
3037
3038 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3039 {
3040         struct cfg80211_registered_device *rdev;
3041         struct net_device *dev;
3042         struct cfg80211_scan_request *request;
3043         struct cfg80211_ssid *ssid;
3044         struct ieee80211_channel *channel;
3045         struct nlattr *attr;
3046         struct wiphy *wiphy;
3047         int err, tmp, n_ssids = 0, n_channels, i;
3048         enum ieee80211_band band;
3049         size_t ie_len;
3050
3051         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3052                 return -EINVAL;
3053
3054         rtnl_lock();
3055
3056         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3057         if (err)
3058                 goto out_rtnl;
3059
3060         wiphy = &rdev->wiphy;
3061
3062         if (!rdev->ops->scan) {
3063                 err = -EOPNOTSUPP;
3064                 goto out;
3065         }
3066
3067         if (!netif_running(dev)) {
3068                 err = -ENETDOWN;
3069                 goto out;
3070         }
3071
3072         if (rdev->scan_req) {
3073                 err = -EBUSY;
3074                 goto out;
3075         }
3076
3077         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3078                 n_channels = validate_scan_freqs(
3079                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3080                 if (!n_channels) {
3081                         err = -EINVAL;
3082                         goto out;
3083                 }
3084         } else {
3085                 n_channels = 0;
3086
3087                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3088                         if (wiphy->bands[band])
3089                                 n_channels += wiphy->bands[band]->n_channels;
3090         }
3091
3092         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3093                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3094                         n_ssids++;
3095
3096         if (n_ssids > wiphy->max_scan_ssids) {
3097                 err = -EINVAL;
3098                 goto out;
3099         }
3100
3101         if (info->attrs[NL80211_ATTR_IE])
3102                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3103         else
3104                 ie_len = 0;
3105
3106         if (ie_len > wiphy->max_scan_ie_len) {
3107                 err = -EINVAL;
3108                 goto out;
3109         }
3110
3111         request = kzalloc(sizeof(*request)
3112                         + sizeof(*ssid) * n_ssids
3113                         + sizeof(channel) * n_channels
3114                         + ie_len, GFP_KERNEL);
3115         if (!request) {
3116                 err = -ENOMEM;
3117                 goto out;
3118         }
3119
3120         if (n_ssids)
3121                 request->ssids = (void *)&request->channels[n_channels];
3122         request->n_ssids = n_ssids;
3123         if (ie_len) {
3124                 if (request->ssids)
3125                         request->ie = (void *)(request->ssids + n_ssids);
3126                 else
3127                         request->ie = (void *)(request->channels + n_channels);
3128         }
3129
3130         i = 0;
3131         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3132                 /* user specified, bail out if channel not found */
3133                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3134                         struct ieee80211_channel *chan;
3135
3136                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3137
3138                         if (!chan) {
3139                                 err = -EINVAL;
3140                                 goto out_free;
3141                         }
3142
3143                         /* ignore disabled channels */
3144                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3145                                 continue;
3146
3147                         request->channels[i] = chan;
3148                         i++;
3149                 }
3150         } else {
3151                 /* all channels */
3152                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3153                         int j;
3154                         if (!wiphy->bands[band])
3155                                 continue;
3156                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3157                                 struct ieee80211_channel *chan;
3158
3159                                 chan = &wiphy->bands[band]->channels[j];
3160
3161                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3162                                         continue;
3163
3164                                 request->channels[i] = chan;
3165                                 i++;
3166                         }
3167                 }
3168         }
3169
3170         if (!i) {
3171                 err = -EINVAL;
3172                 goto out_free;
3173         }
3174
3175         request->n_channels = i;
3176
3177         i = 0;
3178         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3179                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3180                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3181                                 err = -EINVAL;
3182                                 goto out_free;
3183                         }
3184                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3185                         request->ssids[i].ssid_len = nla_len(attr);
3186                         i++;
3187                 }
3188         }
3189
3190         if (info->attrs[NL80211_ATTR_IE]) {
3191                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3192                 memcpy((void *)request->ie,
3193                        nla_data(info->attrs[NL80211_ATTR_IE]),
3194                        request->ie_len);
3195         }
3196
3197         request->dev = dev;
3198         request->wiphy = &rdev->wiphy;
3199
3200         rdev->scan_req = request;
3201         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3202
3203         if (!err) {
3204                 nl80211_send_scan_start(rdev, dev);
3205                 dev_hold(dev);
3206         }
3207
3208  out_free:
3209         if (err) {
3210                 rdev->scan_req = NULL;
3211                 kfree(request);
3212         }
3213  out:
3214         cfg80211_unlock_rdev(rdev);
3215         dev_put(dev);
3216  out_rtnl:
3217         rtnl_unlock();
3218
3219         return err;
3220 }
3221
3222 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3223                             struct cfg80211_registered_device *rdev,
3224                             struct wireless_dev *wdev,
3225                             struct cfg80211_internal_bss *intbss)
3226 {
3227         struct cfg80211_bss *res = &intbss->pub;
3228         void *hdr;
3229         struct nlattr *bss;
3230         int i;
3231
3232         ASSERT_WDEV_LOCK(wdev);
3233
3234         hdr = nl80211hdr_put(msg, pid, seq, flags,
3235                              NL80211_CMD_NEW_SCAN_RESULTS);
3236         if (!hdr)
3237                 return -1;
3238
3239         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3240         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3241
3242         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3243         if (!bss)
3244                 goto nla_put_failure;
3245         if (!is_zero_ether_addr(res->bssid))
3246                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3247         if (res->information_elements && res->len_information_elements)
3248                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3249                         res->len_information_elements,
3250                         res->information_elements);
3251         if (res->beacon_ies && res->len_beacon_ies &&
3252             res->beacon_ies != res->information_elements)
3253                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3254                         res->len_beacon_ies, res->beacon_ies);
3255         if (res->tsf)
3256                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3257         if (res->beacon_interval)
3258                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3259         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3260         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3261         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3262                 jiffies_to_msecs(jiffies - intbss->ts));
3263
3264         switch (rdev->wiphy.signal_type) {
3265         case CFG80211_SIGNAL_TYPE_MBM:
3266                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3267                 break;
3268         case CFG80211_SIGNAL_TYPE_UNSPEC:
3269                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3270                 break;
3271         default:
3272                 break;
3273         }
3274
3275         switch (wdev->iftype) {
3276         case NL80211_IFTYPE_STATION:
3277                 if (intbss == wdev->current_bss)
3278                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3279                                     NL80211_BSS_STATUS_ASSOCIATED);
3280                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3281                         if (intbss != wdev->auth_bsses[i])
3282                                 continue;
3283                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3284                                     NL80211_BSS_STATUS_AUTHENTICATED);
3285                         break;
3286                 }
3287                 break;
3288         case NL80211_IFTYPE_ADHOC:
3289                 if (intbss == wdev->current_bss)
3290                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3291                                     NL80211_BSS_STATUS_IBSS_JOINED);
3292                 break;
3293         default:
3294                 break;
3295         }
3296
3297         nla_nest_end(msg, bss);
3298
3299         return genlmsg_end(msg, hdr);
3300
3301  nla_put_failure:
3302         genlmsg_cancel(msg, hdr);
3303         return -EMSGSIZE;
3304 }
3305
3306 static int nl80211_dump_scan(struct sk_buff *skb,
3307                              struct netlink_callback *cb)
3308 {
3309         struct cfg80211_registered_device *rdev;
3310         struct net_device *dev;
3311         struct cfg80211_internal_bss *scan;
3312         struct wireless_dev *wdev;
3313         int ifidx = cb->args[0];
3314         int start = cb->args[1], idx = 0;
3315         int err;
3316
3317         if (!ifidx)
3318                 ifidx = nl80211_get_ifidx(cb);
3319         if (ifidx < 0)
3320                 return ifidx;
3321         cb->args[0] = ifidx;
3322
3323         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3324         if (!dev)
3325                 return -ENODEV;
3326
3327         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3328         if (IS_ERR(rdev)) {
3329                 err = PTR_ERR(rdev);
3330                 goto out_put_netdev;
3331         }
3332
3333         wdev = dev->ieee80211_ptr;
3334
3335         wdev_lock(wdev);
3336         spin_lock_bh(&rdev->bss_lock);
3337         cfg80211_bss_expire(rdev);
3338
3339         list_for_each_entry(scan, &rdev->bss_list, list) {
3340                 if (++idx <= start)
3341                         continue;
3342                 if (nl80211_send_bss(skb,
3343                                 NETLINK_CB(cb->skb).pid,
3344                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3345                                 rdev, wdev, scan) < 0) {
3346                         idx--;
3347                         goto out;
3348                 }
3349         }
3350
3351  out:
3352         spin_unlock_bh(&rdev->bss_lock);
3353         wdev_unlock(wdev);
3354
3355         cb->args[1] = idx;
3356         err = skb->len;
3357         cfg80211_unlock_rdev(rdev);
3358  out_put_netdev:
3359         dev_put(dev);
3360
3361         return err;
3362 }
3363
3364 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3365                                 int flags, struct net_device *dev,
3366                                 struct survey_info *survey)
3367 {
3368         void *hdr;
3369         struct nlattr *infoattr;
3370
3371         /* Survey without a channel doesn't make sense */
3372         if (!survey->channel)
3373                 return -EINVAL;
3374
3375         hdr = nl80211hdr_put(msg, pid, seq, flags,
3376                              NL80211_CMD_NEW_SURVEY_RESULTS);
3377         if (!hdr)
3378                 return -ENOMEM;
3379
3380         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3381
3382         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3383         if (!infoattr)
3384                 goto nla_put_failure;
3385
3386         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3387                     survey->channel->center_freq);
3388         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3389                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3390                             survey->noise);
3391
3392         nla_nest_end(msg, infoattr);
3393
3394         return genlmsg_end(msg, hdr);
3395
3396  nla_put_failure:
3397         genlmsg_cancel(msg, hdr);
3398         return -EMSGSIZE;
3399 }
3400
3401 static int nl80211_dump_survey(struct sk_buff *skb,
3402                         struct netlink_callback *cb)
3403 {
3404         struct survey_info survey;
3405         struct cfg80211_registered_device *dev;
3406         struct net_device *netdev;
3407         int ifidx = cb->args[0];
3408         int survey_idx = cb->args[1];
3409         int res;
3410
3411         if (!ifidx)
3412                 ifidx = nl80211_get_ifidx(cb);
3413         if (ifidx < 0)
3414                 return ifidx;
3415         cb->args[0] = ifidx;
3416
3417         rtnl_lock();
3418
3419         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3420         if (!netdev) {
3421                 res = -ENODEV;
3422                 goto out_rtnl;
3423         }
3424
3425         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3426         if (IS_ERR(dev)) {
3427                 res = PTR_ERR(dev);
3428                 goto out_rtnl;
3429         }
3430
3431         if (!dev->ops->dump_survey) {
3432                 res = -EOPNOTSUPP;
3433                 goto out_err;
3434         }
3435
3436         while (1) {
3437                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3438                                             &survey);
3439                 if (res == -ENOENT)
3440                         break;
3441                 if (res)
3442                         goto out_err;
3443
3444                 if (nl80211_send_survey(skb,
3445                                 NETLINK_CB(cb->skb).pid,
3446                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3447                                 netdev,
3448                                 &survey) < 0)
3449                         goto out;
3450                 survey_idx++;
3451         }
3452
3453  out:
3454         cb->args[1] = survey_idx;
3455         res = skb->len;
3456  out_err:
3457         cfg80211_unlock_rdev(dev);
3458  out_rtnl:
3459         rtnl_unlock();
3460
3461         return res;
3462 }
3463
3464 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3465 {
3466         return auth_type <= NL80211_AUTHTYPE_MAX;
3467 }
3468
3469 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3470 {
3471         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3472                                   NL80211_WPA_VERSION_2));
3473 }
3474
3475 static bool nl80211_valid_akm_suite(u32 akm)
3476 {
3477         return akm == WLAN_AKM_SUITE_8021X ||
3478                 akm == WLAN_AKM_SUITE_PSK;
3479 }
3480
3481 static bool nl80211_valid_cipher_suite(u32 cipher)
3482 {
3483         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3484                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3485                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3486                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3487                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3488 }
3489
3490
3491 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3492 {
3493         struct cfg80211_registered_device *rdev;
3494         struct net_device *dev;
3495         struct ieee80211_channel *chan;
3496         const u8 *bssid, *ssid, *ie = NULL;
3497         int err, ssid_len, ie_len = 0;
3498         enum nl80211_auth_type auth_type;
3499         struct key_parse key;
3500         bool local_state_change;
3501
3502         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3503                 return -EINVAL;
3504
3505         if (!info->attrs[NL80211_ATTR_MAC])
3506                 return -EINVAL;
3507
3508         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3509                 return -EINVAL;
3510
3511         if (!info->attrs[NL80211_ATTR_SSID])
3512                 return -EINVAL;
3513
3514         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3515                 return -EINVAL;
3516
3517         err = nl80211_parse_key(info, &key);
3518         if (err)
3519                 return err;
3520
3521         if (key.idx >= 0) {
3522                 if (!key.p.key || !key.p.key_len)
3523                         return -EINVAL;
3524                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3525                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3526                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3527                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3528                         return -EINVAL;
3529                 if (key.idx > 4)
3530                         return -EINVAL;
3531         } else {
3532                 key.p.key_len = 0;
3533                 key.p.key = NULL;
3534         }
3535
3536         rtnl_lock();
3537
3538         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3539         if (err)
3540                 goto unlock_rtnl;
3541
3542         if (!rdev->ops->auth) {
3543                 err = -EOPNOTSUPP;
3544                 goto out;
3545         }
3546
3547         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3548                 err = -EOPNOTSUPP;
3549                 goto out;
3550         }
3551
3552         if (!netif_running(dev)) {
3553                 err = -ENETDOWN;
3554                 goto out;
3555         }
3556
3557         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3558         chan = ieee80211_get_channel(&rdev->wiphy,
3559                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3560         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3561                 err = -EINVAL;
3562                 goto out;
3563         }
3564
3565         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3566         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3567
3568         if (info->attrs[NL80211_ATTR_IE]) {
3569                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3570                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3571         }
3572
3573         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3574         if (!nl80211_valid_auth_type(auth_type)) {
3575                 err = -EINVAL;
3576                 goto out;
3577         }
3578
3579         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3580
3581         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3582                                  ssid, ssid_len, ie, ie_len,
3583                                  key.p.key, key.p.key_len, key.idx,
3584                                  local_state_change);
3585
3586 out:
3587         cfg80211_unlock_rdev(rdev);
3588         dev_put(dev);
3589 unlock_rtnl:
3590         rtnl_unlock();
3591         return err;
3592 }
3593
3594 static int nl80211_crypto_settings(struct genl_info *info,
3595                                    struct cfg80211_crypto_settings *settings,
3596                                    int cipher_limit)
3597 {
3598         memset(settings, 0, sizeof(*settings));
3599
3600         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3601
3602         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3603                 void *data;
3604                 int len, i;
3605
3606                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3607                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3608                 settings->n_ciphers_pairwise = len / sizeof(u32);
3609
3610                 if (len % sizeof(u32))
3611                         return -EINVAL;
3612
3613                 if (settings->n_ciphers_pairwise > cipher_limit)
3614                         return -EINVAL;
3615
3616                 memcpy(settings->ciphers_pairwise, data, len);
3617
3618                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3619                         if (!nl80211_valid_cipher_suite(
3620                                         settings->ciphers_pairwise[i]))
3621                                 return -EINVAL;
3622         }
3623
3624         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3625                 settings->cipher_group =
3626                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3627                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3628                         return -EINVAL;
3629         }
3630
3631         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3632                 settings->wpa_versions =
3633                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3634                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3635                         return -EINVAL;
3636         }
3637
3638         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3639                 void *data;
3640                 int len, i;
3641
3642                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3643                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3644                 settings->n_akm_suites = len / sizeof(u32);
3645
3646                 if (len % sizeof(u32))
3647                         return -EINVAL;
3648
3649                 memcpy(settings->akm_suites, data, len);
3650
3651                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3652                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3653                                 return -EINVAL;
3654         }
3655
3656         return 0;
3657 }
3658
3659 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3660 {
3661         struct cfg80211_registered_device *rdev;
3662         struct net_device *dev;
3663         struct cfg80211_crypto_settings crypto;
3664         struct ieee80211_channel *chan;
3665         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3666         int err, ssid_len, ie_len = 0;
3667         bool use_mfp = false;
3668
3669         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3670                 return -EINVAL;
3671
3672         if (!info->attrs[NL80211_ATTR_MAC] ||
3673             !info->attrs[NL80211_ATTR_SSID] ||
3674             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3675                 return -EINVAL;
3676
3677         rtnl_lock();
3678
3679         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3680         if (err)
3681                 goto unlock_rtnl;
3682
3683         if (!rdev->ops->assoc) {
3684                 err = -EOPNOTSUPP;
3685                 goto out;
3686         }
3687
3688         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3689                 err = -EOPNOTSUPP;
3690                 goto out;
3691         }
3692
3693         if (!netif_running(dev)) {
3694                 err = -ENETDOWN;
3695                 goto out;
3696         }
3697
3698         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3699
3700         chan = ieee80211_get_channel(&rdev->wiphy,
3701                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3702         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3703                 err = -EINVAL;
3704                 goto out;
3705         }
3706
3707         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3708         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3709
3710         if (info->attrs[NL80211_ATTR_IE]) {
3711                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3712                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3713         }
3714
3715         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3716                 enum nl80211_mfp mfp =
3717                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3718                 if (mfp == NL80211_MFP_REQUIRED)
3719                         use_mfp = true;
3720                 else if (mfp != NL80211_MFP_NO) {
3721                         err = -EINVAL;
3722                         goto out;
3723                 }
3724         }
3725
3726         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3727                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3728
3729         err = nl80211_crypto_settings(info, &crypto, 1);
3730         if (!err)
3731                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3732                                           ssid, ssid_len, ie, ie_len, use_mfp,
3733                                           &crypto);
3734
3735 out:
3736         cfg80211_unlock_rdev(rdev);
3737         dev_put(dev);
3738 unlock_rtnl:
3739         rtnl_unlock();
3740         return err;
3741 }
3742
3743 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3744 {
3745         struct cfg80211_registered_device *rdev;
3746         struct net_device *dev;
3747         const u8 *ie = NULL, *bssid;
3748         int err, ie_len = 0;
3749         u16 reason_code;
3750         bool local_state_change;
3751
3752         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3753                 return -EINVAL;
3754
3755         if (!info->attrs[NL80211_ATTR_MAC])
3756                 return -EINVAL;
3757
3758         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3759                 return -EINVAL;
3760
3761         rtnl_lock();
3762
3763         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3764         if (err)
3765                 goto unlock_rtnl;
3766
3767         if (!rdev->ops->deauth) {
3768                 err = -EOPNOTSUPP;
3769                 goto out;
3770         }
3771
3772         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3773                 err = -EOPNOTSUPP;
3774                 goto out;
3775         }
3776
3777         if (!netif_running(dev)) {
3778                 err = -ENETDOWN;
3779                 goto out;
3780         }
3781
3782         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3783
3784         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3785         if (reason_code == 0) {
3786                 /* Reason Code 0 is reserved */
3787                 err = -EINVAL;
3788                 goto out;
3789         }
3790
3791         if (info->attrs[NL80211_ATTR_IE]) {
3792                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3793                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3794         }
3795
3796         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3797
3798         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3799                                    local_state_change);
3800
3801 out:
3802         cfg80211_unlock_rdev(rdev);
3803         dev_put(dev);
3804 unlock_rtnl:
3805         rtnl_unlock();
3806         return err;
3807 }
3808
3809 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3810 {
3811         struct cfg80211_registered_device *rdev;
3812         struct net_device *dev;
3813         const u8 *ie = NULL, *bssid;
3814         int err, ie_len = 0;
3815         u16 reason_code;
3816         bool local_state_change;
3817
3818         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3819                 return -EINVAL;
3820
3821         if (!info->attrs[NL80211_ATTR_MAC])
3822                 return -EINVAL;
3823
3824         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3825                 return -EINVAL;
3826
3827         rtnl_lock();
3828
3829         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3830         if (err)
3831                 goto unlock_rtnl;
3832
3833         if (!rdev->ops->disassoc) {
3834                 err = -EOPNOTSUPP;
3835                 goto out;
3836         }
3837
3838         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3839                 err = -EOPNOTSUPP;
3840                 goto out;
3841         }
3842
3843         if (!netif_running(dev)) {
3844                 err = -ENETDOWN;
3845                 goto out;
3846         }
3847
3848         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3849
3850         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3851         if (reason_code == 0) {
3852                 /* Reason Code 0 is reserved */
3853                 err = -EINVAL;
3854                 goto out;
3855         }
3856
3857         if (info->attrs[NL80211_ATTR_IE]) {
3858                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3859                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3860         }
3861
3862         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3863
3864         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3865                                      local_state_change);
3866
3867 out:
3868         cfg80211_unlock_rdev(rdev);
3869         dev_put(dev);
3870 unlock_rtnl:
3871         rtnl_unlock();
3872         return err;
3873 }
3874
3875 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3876 {
3877         struct cfg80211_registered_device *rdev;
3878         struct net_device *dev;
3879         struct cfg80211_ibss_params ibss;
3880         struct wiphy *wiphy;
3881         struct cfg80211_cached_keys *connkeys = NULL;
3882         int err;
3883
3884         memset(&ibss, 0, sizeof(ibss));
3885
3886         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3887                 return -EINVAL;
3888
3889         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3890             !info->attrs[NL80211_ATTR_SSID] ||
3891             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3892                 return -EINVAL;
3893
3894         ibss.beacon_interval = 100;
3895
3896         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3897                 ibss.beacon_interval =
3898                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3899                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3900                         return -EINVAL;
3901         }
3902
3903         rtnl_lock();
3904
3905         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3906         if (err)
3907                 goto unlock_rtnl;
3908
3909         if (!rdev->ops->join_ibss) {
3910                 err = -EOPNOTSUPP;
3911                 goto out;
3912         }
3913
3914         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3915                 err = -EOPNOTSUPP;
3916                 goto out;
3917         }
3918
3919         if (!netif_running(dev)) {
3920                 err = -ENETDOWN;
3921                 goto out;
3922         }
3923
3924         wiphy = &rdev->wiphy;
3925
3926         if (info->attrs[NL80211_ATTR_MAC])
3927                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3928         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3929         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3930
3931         if (info->attrs[NL80211_ATTR_IE]) {
3932                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3933                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3934         }
3935
3936         ibss.channel = ieee80211_get_channel(wiphy,
3937                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3938         if (!ibss.channel ||
3939             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3940             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3941                 err = -EINVAL;
3942                 goto out;
3943         }
3944
3945         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3946         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3947
3948         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3949                 connkeys = nl80211_parse_connkeys(rdev,
3950                                         info->attrs[NL80211_ATTR_KEYS]);
3951                 if (IS_ERR(connkeys)) {
3952                         err = PTR_ERR(connkeys);
3953                         connkeys = NULL;
3954                         goto out;
3955                 }
3956         }
3957
3958         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3959                 u8 *rates =
3960                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3961                 int n_rates =
3962                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3963                 struct ieee80211_supported_band *sband =
3964                         wiphy->bands[ibss.channel->band];
3965                 int i, j;
3966
3967                 if (n_rates == 0) {
3968                         err = -EINVAL;
3969                         goto out;
3970                 }
3971
3972                 for (i = 0; i < n_rates; i++) {
3973                         int rate = (rates[i] & 0x7f) * 5;
3974                         bool found = false;
3975
3976                         for (j = 0; j < sband->n_bitrates; j++) {
3977                                 if (sband->bitrates[j].bitrate == rate) {
3978                                         found = true;
3979                                         ibss.basic_rates |= BIT(j);
3980                                         break;
3981                                 }
3982                         }
3983                         if (!found) {
3984                                 err = -EINVAL;
3985                                 goto out;
3986                         }
3987                 }
3988         } else {
3989                 /*
3990                 * If no rates were explicitly configured,
3991                 * use the mandatory rate set for 11b or
3992                 * 11a for maximum compatibility.
3993                 */
3994                 struct ieee80211_supported_band *sband =
3995                         wiphy->bands[ibss.channel->band];
3996                 int j;
3997                 u32 flag = ibss.channel->band == IEEE80211_BAND_5GHZ ?
3998                         IEEE80211_RATE_MANDATORY_A :
3999                         IEEE80211_RATE_MANDATORY_B;
4000
4001                 for (j = 0; j < sband->n_bitrates; j++) {
4002                         if (sband->bitrates[j].flags & flag)
4003                                 ibss.basic_rates |= BIT(j);
4004                 }
4005         }
4006
4007         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4008
4009 out:
4010         cfg80211_unlock_rdev(rdev);
4011         dev_put(dev);
4012 unlock_rtnl:
4013         if (err)
4014                 kfree(connkeys);
4015         rtnl_unlock();
4016         return err;
4017 }
4018
4019 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4020 {
4021         struct cfg80211_registered_device *rdev;
4022         struct net_device *dev;
4023         int err;
4024
4025         rtnl_lock();
4026
4027         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4028         if (err)
4029                 goto unlock_rtnl;
4030
4031         if (!rdev->ops->leave_ibss) {
4032                 err = -EOPNOTSUPP;
4033                 goto out;
4034         }
4035
4036         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4037                 err = -EOPNOTSUPP;
4038                 goto out;
4039         }
4040
4041         if (!netif_running(dev)) {
4042                 err = -ENETDOWN;
4043                 goto out;
4044         }
4045
4046         err = cfg80211_leave_ibss(rdev, dev, false);
4047
4048 out:
4049         cfg80211_unlock_rdev(rdev);
4050         dev_put(dev);
4051 unlock_rtnl:
4052         rtnl_unlock();
4053         return err;
4054 }
4055
4056 #ifdef CONFIG_NL80211_TESTMODE
4057 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4058         .name = "testmode",
4059 };
4060
4061 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4062 {
4063         struct cfg80211_registered_device *rdev;
4064         int err;
4065
4066         if (!info->attrs[NL80211_ATTR_TESTDATA])
4067                 return -EINVAL;
4068
4069         rtnl_lock();
4070
4071         rdev = cfg80211_get_dev_from_info(info);
4072         if (IS_ERR(rdev)) {
4073                 err = PTR_ERR(rdev);
4074                 goto unlock_rtnl;
4075         }
4076
4077         err = -EOPNOTSUPP;
4078         if (rdev->ops->testmode_cmd) {
4079                 rdev->testmode_info = info;
4080                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4081                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4082                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4083                 rdev->testmode_info = NULL;
4084         }
4085
4086         cfg80211_unlock_rdev(rdev);
4087
4088  unlock_rtnl:
4089         rtnl_unlock();
4090         return err;
4091 }
4092
4093 static struct sk_buff *
4094 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4095                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4096 {
4097         struct sk_buff *skb;
4098         void *hdr;
4099         struct nlattr *data;
4100
4101         skb = nlmsg_new(approxlen + 100, gfp);
4102         if (!skb)
4103                 return NULL;
4104
4105         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4106         if (!hdr) {
4107                 kfree_skb(skb);
4108                 return NULL;
4109         }
4110
4111         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4112         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4113
4114         ((void **)skb->cb)[0] = rdev;
4115         ((void **)skb->cb)[1] = hdr;
4116         ((void **)skb->cb)[2] = data;
4117
4118         return skb;
4119
4120  nla_put_failure:
4121         kfree_skb(skb);
4122         return NULL;
4123 }
4124
4125 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4126                                                   int approxlen)
4127 {
4128         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4129
4130         if (WARN_ON(!rdev->testmode_info))
4131                 return NULL;
4132
4133         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4134                                 rdev->testmode_info->snd_pid,
4135                                 rdev->testmode_info->snd_seq,
4136                                 GFP_KERNEL);
4137 }
4138 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4139
4140 int cfg80211_testmode_reply(struct sk_buff *skb)
4141 {
4142         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4143         void *hdr = ((void **)skb->cb)[1];
4144         struct nlattr *data = ((void **)skb->cb)[2];
4145
4146         if (WARN_ON(!rdev->testmode_info)) {
4147                 kfree_skb(skb);
4148                 return -EINVAL;
4149         }
4150
4151         nla_nest_end(skb, data);
4152         genlmsg_end(skb, hdr);
4153         return genlmsg_reply(skb, rdev->testmode_info);
4154 }
4155 EXPORT_SYMBOL(cfg80211_testmode_reply);
4156
4157 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4158                                                   int approxlen, gfp_t gfp)
4159 {
4160         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4161
4162         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4163 }
4164 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4165
4166 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4167 {
4168         void *hdr = ((void **)skb->cb)[1];
4169         struct nlattr *data = ((void **)skb->cb)[2];
4170
4171         nla_nest_end(skb, data);
4172         genlmsg_end(skb, hdr);
4173         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4174 }
4175 EXPORT_SYMBOL(cfg80211_testmode_event);
4176 #endif
4177
4178 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4179 {
4180         struct cfg80211_registered_device *rdev;
4181         struct net_device *dev;
4182         struct cfg80211_connect_params connect;
4183         struct wiphy *wiphy;
4184         struct cfg80211_cached_keys *connkeys = NULL;
4185         int err;
4186
4187         memset(&connect, 0, sizeof(connect));
4188
4189         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4190                 return -EINVAL;
4191
4192         if (!info->attrs[NL80211_ATTR_SSID] ||
4193             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4194                 return -EINVAL;
4195
4196         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4197                 connect.auth_type =
4198                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4199                 if (!nl80211_valid_auth_type(connect.auth_type))
4200                         return -EINVAL;
4201         } else
4202                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4203
4204         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4205
4206         err = nl80211_crypto_settings(info, &connect.crypto,
4207                                       NL80211_MAX_NR_CIPHER_SUITES);
4208         if (err)
4209                 return err;
4210         rtnl_lock();
4211
4212         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4213         if (err)
4214                 goto unlock_rtnl;
4215
4216         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4217                 err = -EOPNOTSUPP;
4218                 goto out;
4219         }
4220
4221         if (!netif_running(dev)) {
4222                 err = -ENETDOWN;
4223                 goto out;
4224         }
4225
4226         wiphy = &rdev->wiphy;
4227
4228         if (info->attrs[NL80211_ATTR_MAC])
4229                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4230         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4231         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4232
4233         if (info->attrs[NL80211_ATTR_IE]) {
4234                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4235                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4236         }
4237
4238         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4239                 connect.channel =
4240                         ieee80211_get_channel(wiphy,
4241                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4242                 if (!connect.channel ||
4243                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4244                         err = -EINVAL;
4245                         goto out;
4246                 }
4247         }
4248
4249         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4250                 connkeys = nl80211_parse_connkeys(rdev,
4251                                         info->attrs[NL80211_ATTR_KEYS]);
4252                 if (IS_ERR(connkeys)) {
4253                         err = PTR_ERR(connkeys);
4254                         connkeys = NULL;
4255                         goto out;
4256                 }
4257         }
4258
4259         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4260
4261 out:
4262         cfg80211_unlock_rdev(rdev);
4263         dev_put(dev);
4264 unlock_rtnl:
4265         if (err)
4266                 kfree(connkeys);
4267         rtnl_unlock();
4268         return err;
4269 }
4270
4271 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4272 {
4273         struct cfg80211_registered_device *rdev;
4274         struct net_device *dev;
4275         int err;
4276         u16 reason;
4277
4278         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4279                 reason = WLAN_REASON_DEAUTH_LEAVING;
4280         else
4281                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4282
4283         if (reason == 0)
4284                 return -EINVAL;
4285
4286         rtnl_lock();
4287
4288         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4289         if (err)
4290                 goto unlock_rtnl;
4291
4292         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4293                 err = -EOPNOTSUPP;
4294                 goto out;
4295         }
4296
4297         if (!netif_running(dev)) {
4298                 err = -ENETDOWN;
4299                 goto out;
4300         }
4301
4302         err = cfg80211_disconnect(rdev, dev, reason, true);
4303
4304 out:
4305         cfg80211_unlock_rdev(rdev);
4306         dev_put(dev);
4307 unlock_rtnl:
4308         rtnl_unlock();
4309         return err;
4310 }
4311
4312 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4313 {
4314         struct cfg80211_registered_device *rdev;
4315         struct net *net;
4316         int err;
4317         u32 pid;
4318
4319         if (!info->attrs[NL80211_ATTR_PID])
4320                 return -EINVAL;
4321
4322         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4323
4324         rtnl_lock();
4325
4326         rdev = cfg80211_get_dev_from_info(info);
4327         if (IS_ERR(rdev)) {
4328                 err = PTR_ERR(rdev);
4329                 goto out_rtnl;
4330         }
4331
4332         net = get_net_ns_by_pid(pid);
4333         if (IS_ERR(net)) {
4334                 err = PTR_ERR(net);
4335                 goto out;
4336         }
4337
4338         err = 0;
4339
4340         /* check if anything to do */
4341         if (net_eq(wiphy_net(&rdev->wiphy), net))
4342                 goto out_put_net;
4343
4344         err = cfg80211_switch_netns(rdev, net);
4345  out_put_net:
4346         put_net(net);
4347  out:
4348         cfg80211_unlock_rdev(rdev);
4349  out_rtnl:
4350         rtnl_unlock();
4351         return err;
4352 }
4353
4354 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4355 {
4356         struct cfg80211_registered_device *rdev;
4357         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4358                         struct cfg80211_pmksa *pmksa) = NULL;
4359         int err;
4360         struct net_device *dev;
4361         struct cfg80211_pmksa pmksa;
4362
4363         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4364
4365         if (!info->attrs[NL80211_ATTR_MAC])
4366                 return -EINVAL;
4367
4368         if (!info->attrs[NL80211_ATTR_PMKID])
4369                 return -EINVAL;
4370
4371         rtnl_lock();
4372
4373         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4374         if (err)
4375                 goto out_rtnl;
4376
4377         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4378         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4379
4380         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4381                 err = -EOPNOTSUPP;
4382                 goto out;
4383         }
4384
4385         switch (info->genlhdr->cmd) {
4386         case NL80211_CMD_SET_PMKSA:
4387                 rdev_ops = rdev->ops->set_pmksa;
4388                 break;
4389         case NL80211_CMD_DEL_PMKSA:
4390                 rdev_ops = rdev->ops->del_pmksa;
4391                 break;
4392         default:
4393                 WARN_ON(1);
4394                 break;
4395         }
4396
4397         if (!rdev_ops) {
4398                 err = -EOPNOTSUPP;
4399                 goto out;
4400         }
4401
4402         err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4403
4404  out:
4405         cfg80211_unlock_rdev(rdev);
4406         dev_put(dev);
4407  out_rtnl:
4408         rtnl_unlock();
4409
4410         return err;
4411 }
4412
4413 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4414 {
4415         struct cfg80211_registered_device *rdev;
4416         int err;
4417         struct net_device *dev;
4418
4419         rtnl_lock();
4420
4421         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4422         if (err)
4423                 goto out_rtnl;
4424
4425         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4426                 err = -EOPNOTSUPP;
4427                 goto out;
4428         }
4429
4430         if (!rdev->ops->flush_pmksa) {
4431                 err = -EOPNOTSUPP;
4432                 goto out;
4433         }
4434
4435         err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4436
4437  out:
4438         cfg80211_unlock_rdev(rdev);
4439         dev_put(dev);
4440  out_rtnl:
4441         rtnl_unlock();
4442
4443         return err;
4444
4445 }
4446
4447 static int nl80211_remain_on_channel(struct sk_buff *skb,
4448                                      struct genl_info *info)
4449 {
4450         struct cfg80211_registered_device *rdev;
4451         struct net_device *dev;
4452         struct ieee80211_channel *chan;
4453         struct sk_buff *msg;
4454         void *hdr;
4455         u64 cookie;
4456         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4457         u32 freq, duration;
4458         int err;
4459
4460         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4461             !info->attrs[NL80211_ATTR_DURATION])
4462                 return -EINVAL;
4463
4464         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4465
4466         /*
4467          * We should be on that channel for at least one jiffie,
4468          * and more than 5 seconds seems excessive.
4469          */
4470         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4471                 return -EINVAL;
4472
4473         rtnl_lock();
4474
4475         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4476         if (err)
4477                 goto unlock_rtnl;
4478
4479         if (!rdev->ops->remain_on_channel) {
4480                 err = -EOPNOTSUPP;
4481                 goto out;
4482         }
4483
4484         if (!netif_running(dev)) {
4485                 err = -ENETDOWN;
4486                 goto out;
4487         }
4488
4489         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4490                 channel_type = nla_get_u32(
4491                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4492                 if (channel_type != NL80211_CHAN_NO_HT &&
4493                     channel_type != NL80211_CHAN_HT20 &&
4494                     channel_type != NL80211_CHAN_HT40PLUS &&
4495                     channel_type != NL80211_CHAN_HT40MINUS) {
4496                         err = -EINVAL;
4497                         goto out;
4498                 }
4499         }
4500
4501         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4502         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4503         if (chan == NULL) {
4504                 err = -EINVAL;
4505                 goto out;
4506         }
4507
4508         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4509         if (!msg) {
4510                 err = -ENOMEM;
4511                 goto out;
4512         }
4513
4514         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4515                              NL80211_CMD_REMAIN_ON_CHANNEL);
4516
4517         if (IS_ERR(hdr)) {
4518                 err = PTR_ERR(hdr);
4519                 goto free_msg;
4520         }
4521
4522         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4523                                            channel_type, duration, &cookie);
4524
4525         if (err)
4526                 goto free_msg;
4527
4528         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4529
4530         genlmsg_end(msg, hdr);
4531         err = genlmsg_reply(msg, info);
4532         goto out;
4533
4534  nla_put_failure:
4535         err = -ENOBUFS;
4536  free_msg:
4537         nlmsg_free(msg);
4538  out:
4539         cfg80211_unlock_rdev(rdev);
4540         dev_put(dev);
4541  unlock_rtnl:
4542         rtnl_unlock();
4543         return err;
4544 }
4545
4546 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4547                                             struct genl_info *info)
4548 {
4549         struct cfg80211_registered_device *rdev;
4550         struct net_device *dev;
4551         u64 cookie;
4552         int err;
4553
4554         if (!info->attrs[NL80211_ATTR_COOKIE])
4555                 return -EINVAL;
4556
4557         rtnl_lock();
4558
4559         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4560         if (err)
4561                 goto unlock_rtnl;
4562
4563         if (!rdev->ops->cancel_remain_on_channel) {
4564                 err = -EOPNOTSUPP;
4565                 goto out;
4566         }
4567
4568         if (!netif_running(dev)) {
4569                 err = -ENETDOWN;
4570                 goto out;
4571         }
4572
4573         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4574
4575         err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4576
4577  out:
4578         cfg80211_unlock_rdev(rdev);
4579         dev_put(dev);
4580  unlock_rtnl:
4581         rtnl_unlock();
4582         return err;
4583 }
4584
4585 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4586                            u8 *rates, u8 rates_len)
4587 {
4588         u8 i;
4589         u32 mask = 0;
4590
4591         for (i = 0; i < rates_len; i++) {
4592                 int rate = (rates[i] & 0x7f) * 5;
4593                 int ridx;
4594                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4595                         struct ieee80211_rate *srate =
4596                                 &sband->bitrates[ridx];
4597                         if (rate == srate->bitrate) {
4598                                 mask |= 1 << ridx;
4599                                 break;
4600                         }
4601                 }
4602                 if (ridx == sband->n_bitrates)
4603                         return 0; /* rate not found */
4604         }
4605
4606         return mask;
4607 }
4608
4609 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4610         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4611                                     .len = NL80211_MAX_SUPP_RATES },
4612 };
4613
4614 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4615                                        struct genl_info *info)
4616 {
4617         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4618         struct cfg80211_registered_device *rdev;
4619         struct cfg80211_bitrate_mask mask;
4620         int err, rem, i;
4621         struct net_device *dev;
4622         struct nlattr *tx_rates;
4623         struct ieee80211_supported_band *sband;
4624
4625         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4626                 return -EINVAL;
4627
4628         rtnl_lock();
4629
4630         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4631         if (err)
4632                 goto unlock_rtnl;
4633
4634         if (!rdev->ops->set_bitrate_mask) {
4635                 err = -EOPNOTSUPP;
4636                 goto unlock;
4637         }
4638
4639         memset(&mask, 0, sizeof(mask));
4640         /* Default to all rates enabled */
4641         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4642                 sband = rdev->wiphy.bands[i];
4643                 mask.control[i].legacy =
4644                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4645         }
4646
4647         /*
4648          * The nested attribute uses enum nl80211_band as the index. This maps
4649          * directly to the enum ieee80211_band values used in cfg80211.
4650          */
4651         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4652         {
4653                 enum ieee80211_band band = nla_type(tx_rates);
4654                 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4655                         err = -EINVAL;
4656                         goto unlock;
4657                 }
4658                 sband = rdev->wiphy.bands[band];
4659                 if (sband == NULL) {
4660                         err = -EINVAL;
4661                         goto unlock;
4662                 }
4663                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4664                           nla_len(tx_rates), nl80211_txattr_policy);
4665                 if (tb[NL80211_TXRATE_LEGACY]) {
4666                         mask.control[band].legacy = rateset_to_mask(
4667                                 sband,
4668                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4669                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4670                         if (mask.control[band].legacy == 0) {
4671                                 err = -EINVAL;
4672                                 goto unlock;
4673                         }
4674                 }
4675         }
4676
4677         err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4678
4679  unlock:
4680         dev_put(dev);
4681         cfg80211_unlock_rdev(rdev);
4682  unlock_rtnl:
4683         rtnl_unlock();
4684         return err;
4685 }
4686
4687 static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
4688 {
4689         struct cfg80211_registered_device *rdev;
4690         struct net_device *dev;
4691         int err;
4692
4693         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4694                 return -EINVAL;
4695
4696         if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
4697                 return -EINVAL;
4698
4699         rtnl_lock();
4700
4701         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4702         if (err)
4703                 goto unlock_rtnl;
4704
4705         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4706             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4707                 err = -EOPNOTSUPP;
4708                 goto out;
4709         }
4710
4711         /* not much point in registering if we can't reply */
4712         if (!rdev->ops->action) {
4713                 err = -EOPNOTSUPP;
4714                 goto out;
4715         }
4716
4717         err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
4718                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4719                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4720  out:
4721         cfg80211_unlock_rdev(rdev);
4722         dev_put(dev);
4723  unlock_rtnl:
4724         rtnl_unlock();
4725         return err;
4726 }
4727
4728 static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
4729 {
4730         struct cfg80211_registered_device *rdev;
4731         struct net_device *dev;
4732         struct ieee80211_channel *chan;
4733         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4734         bool channel_type_valid = false;
4735         u32 freq;
4736         int err;
4737         void *hdr;
4738         u64 cookie;
4739         struct sk_buff *msg;
4740
4741         if (!info->attrs[NL80211_ATTR_FRAME] ||
4742             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4743                 return -EINVAL;
4744
4745         rtnl_lock();
4746
4747         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4748         if (err)
4749                 goto unlock_rtnl;
4750
4751         if (!rdev->ops->action) {
4752                 err = -EOPNOTSUPP;
4753                 goto out;
4754         }
4755
4756         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4757             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4758                 err = -EOPNOTSUPP;
4759                 goto out;
4760         }
4761
4762         if (!netif_running(dev)) {
4763                 err = -ENETDOWN;
4764                 goto out;
4765         }
4766
4767         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4768                 channel_type = nla_get_u32(
4769                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4770                 if (channel_type != NL80211_CHAN_NO_HT &&
4771                     channel_type != NL80211_CHAN_HT20 &&
4772                     channel_type != NL80211_CHAN_HT40PLUS &&
4773                     channel_type != NL80211_CHAN_HT40MINUS) {
4774                         err = -EINVAL;
4775                         goto out;
4776                 }
4777                 channel_type_valid = true;
4778         }
4779
4780         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4781         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4782         if (chan == NULL) {
4783                 err = -EINVAL;
4784                 goto out;
4785         }
4786
4787         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4788         if (!msg) {
4789                 err = -ENOMEM;
4790                 goto out;
4791         }
4792
4793         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4794                              NL80211_CMD_ACTION);
4795
4796         if (IS_ERR(hdr)) {
4797                 err = PTR_ERR(hdr);
4798                 goto free_msg;
4799         }
4800         err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
4801                                    channel_type_valid,
4802                                    nla_data(info->attrs[NL80211_ATTR_FRAME]),
4803                                    nla_len(info->attrs[NL80211_ATTR_FRAME]),
4804                                    &cookie);
4805         if (err)
4806                 goto free_msg;
4807
4808         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4809
4810         genlmsg_end(msg, hdr);
4811         err = genlmsg_reply(msg, info);
4812         goto out;
4813
4814  nla_put_failure:
4815         err = -ENOBUFS;
4816  free_msg:
4817         nlmsg_free(msg);
4818  out:
4819         cfg80211_unlock_rdev(rdev);
4820         dev_put(dev);
4821 unlock_rtnl:
4822         rtnl_unlock();
4823         return err;
4824 }
4825
4826 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4827 {
4828         struct cfg80211_registered_device *rdev;
4829         struct wireless_dev *wdev;
4830         struct net_device *dev;
4831         u8 ps_state;
4832         bool state;
4833         int err;
4834
4835         if (!info->attrs[NL80211_ATTR_PS_STATE]) {
4836                 err = -EINVAL;
4837                 goto out;
4838         }
4839
4840         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4841
4842         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
4843                 err = -EINVAL;
4844                 goto out;
4845         }
4846
4847         rtnl_lock();
4848
4849         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4850         if (err)
4851                 goto unlock_rdev;
4852
4853         wdev = dev->ieee80211_ptr;
4854
4855         if (!rdev->ops->set_power_mgmt) {
4856                 err = -EOPNOTSUPP;
4857                 goto unlock_rdev;
4858         }
4859
4860         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4861
4862         if (state == wdev->ps)
4863                 goto unlock_rdev;
4864
4865         wdev->ps = state;
4866
4867         if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
4868                                       wdev->ps_timeout))
4869                 /* assume this means it's off */
4870                 wdev->ps = false;
4871
4872 unlock_rdev:
4873         cfg80211_unlock_rdev(rdev);
4874         dev_put(dev);
4875         rtnl_unlock();
4876
4877 out:
4878         return err;
4879 }
4880
4881 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4882 {
4883         struct cfg80211_registered_device *rdev;
4884         enum nl80211_ps_state ps_state;
4885         struct wireless_dev *wdev;
4886         struct net_device *dev;
4887         struct sk_buff *msg;
4888         void *hdr;
4889         int err;
4890
4891         rtnl_lock();
4892
4893         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4894         if (err)
4895                 goto unlock_rtnl;
4896
4897         wdev = dev->ieee80211_ptr;
4898
4899         if (!rdev->ops->set_power_mgmt) {
4900                 err = -EOPNOTSUPP;
4901                 goto out;
4902         }
4903
4904         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4905         if (!msg) {
4906                 err = -ENOMEM;
4907                 goto out;
4908         }
4909
4910         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4911                              NL80211_CMD_GET_POWER_SAVE);
4912         if (!hdr) {
4913                 err = -ENOMEM;
4914                 goto free_msg;
4915         }
4916
4917         if (wdev->ps)
4918                 ps_state = NL80211_PS_ENABLED;
4919         else
4920                 ps_state = NL80211_PS_DISABLED;
4921
4922         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4923
4924         genlmsg_end(msg, hdr);
4925         err = genlmsg_reply(msg, info);
4926         goto out;
4927
4928 nla_put_failure:
4929         err = -ENOBUFS;
4930
4931 free_msg:
4932         nlmsg_free(msg);
4933
4934 out:
4935         cfg80211_unlock_rdev(rdev);
4936         dev_put(dev);
4937
4938 unlock_rtnl:
4939         rtnl_unlock();
4940
4941         return err;
4942 }
4943
4944 static struct nla_policy
4945 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4946         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4947         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4948         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4949 };
4950
4951 static int nl80211_set_cqm_rssi(struct genl_info *info,
4952                                 s32 threshold, u32 hysteresis)
4953 {
4954         struct cfg80211_registered_device *rdev;
4955         struct wireless_dev *wdev;
4956         struct net_device *dev;
4957         int err;
4958
4959         if (threshold > 0)
4960                 return -EINVAL;
4961
4962         rtnl_lock();
4963
4964         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4965         if (err)
4966                 goto unlock_rdev;
4967
4968         wdev = dev->ieee80211_ptr;
4969
4970         if (!rdev->ops->set_cqm_rssi_config) {
4971                 err = -EOPNOTSUPP;
4972                 goto unlock_rdev;
4973         }
4974
4975         if (wdev->iftype != NL80211_IFTYPE_STATION) {
4976                 err = -EOPNOTSUPP;
4977                 goto unlock_rdev;
4978         }
4979
4980         err = rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4981                                              threshold, hysteresis);
4982
4983 unlock_rdev:
4984         cfg80211_unlock_rdev(rdev);
4985         dev_put(dev);
4986         rtnl_unlock();
4987
4988         return err;
4989 }
4990
4991 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4992 {
4993         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4994         struct nlattr *cqm;
4995         int err;
4996
4997         cqm = info->attrs[NL80211_ATTR_CQM];
4998         if (!cqm) {
4999                 err = -EINVAL;
5000                 goto out;
5001         }
5002
5003         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5004                                nl80211_attr_cqm_policy);
5005         if (err)
5006                 goto out;
5007
5008         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5009             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5010                 s32 threshold;
5011                 u32 hysteresis;
5012                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5013                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5014                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5015         } else
5016                 err = -EINVAL;
5017
5018 out:
5019         return err;
5020 }
5021
5022 static struct genl_ops nl80211_ops[] = {
5023         {
5024                 .cmd = NL80211_CMD_GET_WIPHY,
5025                 .doit = nl80211_get_wiphy,
5026                 .dumpit = nl80211_dump_wiphy,
5027                 .policy = nl80211_policy,
5028                 /* can be retrieved by unprivileged users */
5029         },
5030         {
5031                 .cmd = NL80211_CMD_SET_WIPHY,
5032                 .doit = nl80211_set_wiphy,
5033                 .policy = nl80211_policy,
5034                 .flags = GENL_ADMIN_PERM,
5035         },
5036         {
5037                 .cmd = NL80211_CMD_GET_INTERFACE,
5038                 .doit = nl80211_get_interface,
5039                 .dumpit = nl80211_dump_interface,
5040                 .policy = nl80211_policy,
5041                 /* can be retrieved by unprivileged users */
5042         },
5043         {
5044                 .cmd = NL80211_CMD_SET_INTERFACE,
5045                 .doit = nl80211_set_interface,
5046                 .policy = nl80211_policy,
5047                 .flags = GENL_ADMIN_PERM,
5048         },
5049         {
5050                 .cmd = NL80211_CMD_NEW_INTERFACE,
5051                 .doit = nl80211_new_interface,
5052                 .policy = nl80211_policy,
5053                 .flags = GENL_ADMIN_PERM,
5054         },
5055         {
5056                 .cmd = NL80211_CMD_DEL_INTERFACE,
5057                 .doit = nl80211_del_interface,
5058                 .policy = nl80211_policy,
5059                 .flags = GENL_ADMIN_PERM,
5060         },
5061         {
5062                 .cmd = NL80211_CMD_GET_KEY,
5063                 .doit = nl80211_get_key,
5064                 .policy = nl80211_policy,
5065                 .flags = GENL_ADMIN_PERM,
5066         },
5067         {
5068                 .cmd = NL80211_CMD_SET_KEY,
5069                 .doit = nl80211_set_key,
5070                 .policy = nl80211_policy,
5071                 .flags = GENL_ADMIN_PERM,
5072         },
5073         {
5074                 .cmd = NL80211_CMD_NEW_KEY,
5075                 .doit = nl80211_new_key,
5076                 .policy = nl80211_policy,
5077                 .flags = GENL_ADMIN_PERM,
5078         },
5079         {
5080                 .cmd = NL80211_CMD_DEL_KEY,
5081                 .doit = nl80211_del_key,
5082                 .policy = nl80211_policy,
5083                 .flags = GENL_ADMIN_PERM,
5084         },
5085         {
5086                 .cmd = NL80211_CMD_SET_BEACON,
5087                 .policy = nl80211_policy,
5088                 .flags = GENL_ADMIN_PERM,
5089                 .doit = nl80211_addset_beacon,
5090         },
5091         {
5092                 .cmd = NL80211_CMD_NEW_BEACON,
5093                 .policy = nl80211_policy,
5094                 .flags = GENL_ADMIN_PERM,
5095                 .doit = nl80211_addset_beacon,
5096         },
5097         {
5098                 .cmd = NL80211_CMD_DEL_BEACON,
5099                 .policy = nl80211_policy,
5100                 .flags = GENL_ADMIN_PERM,
5101                 .doit = nl80211_del_beacon,
5102         },
5103         {
5104                 .cmd = NL80211_CMD_GET_STATION,
5105                 .doit = nl80211_get_station,
5106                 .dumpit = nl80211_dump_station,
5107                 .policy = nl80211_policy,
5108         },
5109         {
5110                 .cmd = NL80211_CMD_SET_STATION,
5111                 .doit = nl80211_set_station,
5112                 .policy = nl80211_policy,
5113                 .flags = GENL_ADMIN_PERM,
5114         },
5115         {
5116                 .cmd = NL80211_CMD_NEW_STATION,
5117                 .doit = nl80211_new_station,
5118                 .policy = nl80211_policy,
5119                 .flags = GENL_ADMIN_PERM,
5120         },
5121         {
5122                 .cmd = NL80211_CMD_DEL_STATION,
5123                 .doit = nl80211_del_station,
5124                 .policy = nl80211_policy,
5125                 .flags = GENL_ADMIN_PERM,
5126         },
5127         {
5128                 .cmd = NL80211_CMD_GET_MPATH,
5129                 .doit = nl80211_get_mpath,
5130                 .dumpit = nl80211_dump_mpath,
5131                 .policy = nl80211_policy,
5132                 .flags = GENL_ADMIN_PERM,
5133         },
5134         {
5135                 .cmd = NL80211_CMD_SET_MPATH,
5136                 .doit = nl80211_set_mpath,
5137                 .policy = nl80211_policy,
5138                 .flags = GENL_ADMIN_PERM,
5139         },
5140         {
5141                 .cmd = NL80211_CMD_NEW_MPATH,
5142                 .doit = nl80211_new_mpath,
5143                 .policy = nl80211_policy,
5144                 .flags = GENL_ADMIN_PERM,
5145         },
5146         {
5147                 .cmd = NL80211_CMD_DEL_MPATH,
5148                 .doit = nl80211_del_mpath,
5149                 .policy = nl80211_policy,
5150                 .flags = GENL_ADMIN_PERM,
5151         },
5152         {
5153                 .cmd = NL80211_CMD_SET_BSS,
5154                 .doit = nl80211_set_bss,
5155                 .policy = nl80211_policy,
5156                 .flags = GENL_ADMIN_PERM,
5157         },
5158         {
5159                 .cmd = NL80211_CMD_GET_REG,
5160                 .doit = nl80211_get_reg,
5161                 .policy = nl80211_policy,
5162                 /* can be retrieved by unprivileged users */
5163         },
5164         {
5165                 .cmd = NL80211_CMD_SET_REG,
5166                 .doit = nl80211_set_reg,
5167                 .policy = nl80211_policy,
5168                 .flags = GENL_ADMIN_PERM,
5169         },
5170         {
5171                 .cmd = NL80211_CMD_REQ_SET_REG,
5172                 .doit = nl80211_req_set_reg,
5173                 .policy = nl80211_policy,
5174                 .flags = GENL_ADMIN_PERM,
5175         },
5176         {
5177                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
5178                 .doit = nl80211_get_mesh_params,
5179                 .policy = nl80211_policy,
5180                 /* can be retrieved by unprivileged users */
5181         },
5182         {
5183                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
5184                 .doit = nl80211_set_mesh_params,
5185                 .policy = nl80211_policy,
5186                 .flags = GENL_ADMIN_PERM,
5187         },
5188         {
5189                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5190                 .doit = nl80211_trigger_scan,
5191                 .policy = nl80211_policy,
5192                 .flags = GENL_ADMIN_PERM,
5193         },
5194         {
5195                 .cmd = NL80211_CMD_GET_SCAN,
5196                 .policy = nl80211_policy,
5197                 .dumpit = nl80211_dump_scan,
5198         },
5199         {
5200                 .cmd = NL80211_CMD_AUTHENTICATE,
5201                 .doit = nl80211_authenticate,
5202                 .policy = nl80211_policy,
5203                 .flags = GENL_ADMIN_PERM,
5204         },
5205         {
5206                 .cmd = NL80211_CMD_ASSOCIATE,
5207                 .doit = nl80211_associate,
5208                 .policy = nl80211_policy,
5209                 .flags = GENL_ADMIN_PERM,
5210         },
5211         {
5212                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5213                 .doit = nl80211_deauthenticate,
5214                 .policy = nl80211_policy,
5215                 .flags = GENL_ADMIN_PERM,
5216         },
5217         {
5218                 .cmd = NL80211_CMD_DISASSOCIATE,
5219                 .doit = nl80211_disassociate,
5220                 .policy = nl80211_policy,
5221                 .flags = GENL_ADMIN_PERM,
5222         },
5223         {
5224                 .cmd = NL80211_CMD_JOIN_IBSS,
5225                 .doit = nl80211_join_ibss,
5226                 .policy = nl80211_policy,
5227                 .flags = GENL_ADMIN_PERM,
5228         },
5229         {
5230                 .cmd = NL80211_CMD_LEAVE_IBSS,
5231                 .doit = nl80211_leave_ibss,
5232                 .policy = nl80211_policy,
5233                 .flags = GENL_ADMIN_PERM,
5234         },
5235 #ifdef CONFIG_NL80211_TESTMODE
5236         {
5237                 .cmd = NL80211_CMD_TESTMODE,
5238                 .doit = nl80211_testmode_do,
5239                 .policy = nl80211_policy,
5240                 .flags = GENL_ADMIN_PERM,
5241         },
5242 #endif
5243         {
5244                 .cmd = NL80211_CMD_CONNECT,
5245                 .doit = nl80211_connect,
5246                 .policy = nl80211_policy,
5247                 .flags = GENL_ADMIN_PERM,
5248         },
5249         {
5250                 .cmd = NL80211_CMD_DISCONNECT,
5251                 .doit = nl80211_disconnect,
5252                 .policy = nl80211_policy,
5253                 .flags = GENL_ADMIN_PERM,
5254         },
5255         {
5256                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5257                 .doit = nl80211_wiphy_netns,
5258                 .policy = nl80211_policy,
5259                 .flags = GENL_ADMIN_PERM,
5260         },
5261         {
5262                 .cmd = NL80211_CMD_GET_SURVEY,
5263                 .policy = nl80211_policy,
5264                 .dumpit = nl80211_dump_survey,
5265         },
5266         {
5267                 .cmd = NL80211_CMD_SET_PMKSA,
5268                 .doit = nl80211_setdel_pmksa,
5269                 .policy = nl80211_policy,
5270                 .flags = GENL_ADMIN_PERM,
5271         },
5272         {
5273                 .cmd = NL80211_CMD_DEL_PMKSA,
5274                 .doit = nl80211_setdel_pmksa,
5275                 .policy = nl80211_policy,
5276                 .flags = GENL_ADMIN_PERM,
5277         },
5278         {
5279                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5280                 .doit = nl80211_flush_pmksa,
5281                 .policy = nl80211_policy,
5282                 .flags = GENL_ADMIN_PERM,
5283         },
5284         {
5285                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5286                 .doit = nl80211_remain_on_channel,
5287                 .policy = nl80211_policy,
5288                 .flags = GENL_ADMIN_PERM,
5289         },
5290         {
5291                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5292                 .doit = nl80211_cancel_remain_on_channel,
5293                 .policy = nl80211_policy,
5294                 .flags = GENL_ADMIN_PERM,
5295         },
5296         {
5297                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5298                 .doit = nl80211_set_tx_bitrate_mask,
5299                 .policy = nl80211_policy,
5300                 .flags = GENL_ADMIN_PERM,
5301         },
5302         {
5303                 .cmd = NL80211_CMD_REGISTER_ACTION,
5304                 .doit = nl80211_register_action,
5305                 .policy = nl80211_policy,
5306                 .flags = GENL_ADMIN_PERM,
5307         },
5308         {
5309                 .cmd = NL80211_CMD_ACTION,
5310                 .doit = nl80211_action,
5311                 .policy = nl80211_policy,
5312                 .flags = GENL_ADMIN_PERM,
5313         },
5314         {
5315                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5316                 .doit = nl80211_set_power_save,
5317                 .policy = nl80211_policy,
5318                 .flags = GENL_ADMIN_PERM,
5319         },
5320         {
5321                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5322                 .doit = nl80211_get_power_save,
5323                 .policy = nl80211_policy,
5324                 /* can be retrieved by unprivileged users */
5325         },
5326         {
5327                 .cmd = NL80211_CMD_SET_CQM,
5328                 .doit = nl80211_set_cqm,
5329                 .policy = nl80211_policy,
5330                 .flags = GENL_ADMIN_PERM,
5331         },
5332         {
5333                 .cmd = NL80211_CMD_SET_CHANNEL,
5334                 .doit = nl80211_set_channel,
5335                 .policy = nl80211_policy,
5336                 .flags = GENL_ADMIN_PERM,
5337         },
5338 };
5339
5340 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5341         .name = "mlme",
5342 };
5343
5344 /* multicast groups */
5345 static struct genl_multicast_group nl80211_config_mcgrp = {
5346         .name = "config",
5347 };
5348 static struct genl_multicast_group nl80211_scan_mcgrp = {
5349         .name = "scan",
5350 };
5351 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5352         .name = "regulatory",
5353 };
5354
5355 /* notification functions */
5356
5357 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5358 {
5359         struct sk_buff *msg;
5360
5361         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5362         if (!msg)
5363                 return;
5364
5365         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5366                 nlmsg_free(msg);
5367                 return;
5368         }
5369
5370         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5371                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5372 }
5373
5374 static int nl80211_add_scan_req(struct sk_buff *msg,
5375                                 struct cfg80211_registered_device *rdev)
5376 {
5377         struct cfg80211_scan_request *req = rdev->scan_req;
5378         struct nlattr *nest;
5379         int i;
5380
5381         ASSERT_RDEV_LOCK(rdev);
5382
5383         if (WARN_ON(!req))
5384                 return 0;
5385
5386         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5387         if (!nest)
5388                 goto nla_put_failure;
5389         for (i = 0; i < req->n_ssids; i++)
5390                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5391         nla_nest_end(msg, nest);
5392
5393         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5394         if (!nest)
5395                 goto nla_put_failure;
5396         for (i = 0; i < req->n_channels; i++)
5397                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5398         nla_nest_end(msg, nest);
5399
5400         if (req->ie)
5401                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5402
5403         return 0;
5404  nla_put_failure:
5405         return -ENOBUFS;
5406 }
5407
5408 static int nl80211_send_scan_msg(struct sk_buff *msg,
5409                                  struct cfg80211_registered_device *rdev,
5410                                  struct net_device *netdev,
5411                                  u32 pid, u32 seq, int flags,
5412                                  u32 cmd)
5413 {
5414         void *hdr;
5415
5416         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5417         if (!hdr)
5418                 return -1;
5419
5420         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5421         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5422
5423         /* ignore errors and send incomplete event anyway */
5424         nl80211_add_scan_req(msg, rdev);
5425
5426         return genlmsg_end(msg, hdr);
5427
5428  nla_put_failure:
5429         genlmsg_cancel(msg, hdr);
5430         return -EMSGSIZE;
5431 }
5432
5433 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5434                              struct net_device *netdev)
5435 {
5436         struct sk_buff *msg;
5437
5438         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5439         if (!msg)
5440                 return;
5441
5442         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5443                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5444                 nlmsg_free(msg);
5445                 return;
5446         }
5447
5448         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5449                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5450 }
5451
5452 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5453                             struct net_device *netdev)
5454 {
5455         struct sk_buff *msg;
5456
5457         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5458         if (!msg)
5459                 return;
5460
5461         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5462                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5463                 nlmsg_free(msg);
5464                 return;
5465         }
5466
5467         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5468                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5469 }
5470
5471 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5472                                struct net_device *netdev)
5473 {
5474         struct sk_buff *msg;
5475
5476         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5477         if (!msg)
5478                 return;
5479
5480         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5481                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5482                 nlmsg_free(msg);
5483                 return;
5484         }
5485
5486         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5487                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5488 }
5489
5490 /*
5491  * This can happen on global regulatory changes or device specific settings
5492  * based on custom world regulatory domains.
5493  */
5494 void nl80211_send_reg_change_event(struct regulatory_request *request)
5495 {
5496         struct sk_buff *msg;
5497         void *hdr;
5498
5499         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5500         if (!msg)
5501                 return;
5502
5503         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5504         if (!hdr) {
5505                 nlmsg_free(msg);
5506                 return;
5507         }
5508
5509         /* Userspace can always count this one always being set */
5510         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5511
5512         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5513                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5514                            NL80211_REGDOM_TYPE_WORLD);
5515         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5516                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5517                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5518         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5519                  request->intersect)
5520                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5521                            NL80211_REGDOM_TYPE_INTERSECTION);
5522         else {
5523                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5524                            NL80211_REGDOM_TYPE_COUNTRY);
5525                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5526         }
5527
5528         if (wiphy_idx_valid(request->wiphy_idx))
5529                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5530
5531         if (genlmsg_end(msg, hdr) < 0) {
5532                 nlmsg_free(msg);
5533                 return;
5534         }
5535
5536         rcu_read_lock();
5537         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5538                                 GFP_ATOMIC);
5539         rcu_read_unlock();
5540
5541         return;
5542
5543 nla_put_failure:
5544         genlmsg_cancel(msg, hdr);
5545         nlmsg_free(msg);
5546 }
5547
5548 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5549                                     struct net_device *netdev,
5550                                     const u8 *buf, size_t len,
5551                                     enum nl80211_commands cmd, gfp_t gfp)
5552 {
5553         struct sk_buff *msg;
5554         void *hdr;
5555
5556         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5557         if (!msg)
5558                 return;
5559
5560         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5561         if (!hdr) {
5562                 nlmsg_free(msg);
5563                 return;
5564         }
5565
5566         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5567         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5568         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5569
5570         if (genlmsg_end(msg, hdr) < 0) {
5571                 nlmsg_free(msg);
5572                 return;
5573         }
5574
5575         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5576                                 nl80211_mlme_mcgrp.id, gfp);
5577         return;
5578
5579  nla_put_failure:
5580         genlmsg_cancel(msg, hdr);
5581         nlmsg_free(msg);
5582 }
5583
5584 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5585                           struct net_device *netdev, const u8 *buf,
5586                           size_t len, gfp_t gfp)
5587 {
5588         nl80211_send_mlme_event(rdev, netdev, buf, len,
5589                                 NL80211_CMD_AUTHENTICATE, gfp);
5590 }
5591
5592 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5593                            struct net_device *netdev, const u8 *buf,
5594                            size_t len, gfp_t gfp)
5595 {
5596         nl80211_send_mlme_event(rdev, netdev, buf, len,
5597                                 NL80211_CMD_ASSOCIATE, gfp);
5598 }
5599
5600 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5601                          struct net_device *netdev, const u8 *buf,
5602                          size_t len, gfp_t gfp)
5603 {
5604         nl80211_send_mlme_event(rdev, netdev, buf, len,
5605                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5606 }
5607
5608 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5609                            struct net_device *netdev, const u8 *buf,
5610                            size_t len, gfp_t gfp)
5611 {
5612         nl80211_send_mlme_event(rdev, netdev, buf, len,
5613                                 NL80211_CMD_DISASSOCIATE, gfp);
5614 }
5615
5616 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5617                                       struct net_device *netdev, int cmd,
5618                                       const u8 *addr, gfp_t gfp)
5619 {
5620         struct sk_buff *msg;
5621         void *hdr;
5622
5623         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5624         if (!msg)
5625                 return;
5626
5627         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5628         if (!hdr) {
5629                 nlmsg_free(msg);
5630                 return;
5631         }
5632
5633         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5634         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5635         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5636         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5637
5638         if (genlmsg_end(msg, hdr) < 0) {
5639                 nlmsg_free(msg);
5640                 return;
5641         }
5642
5643         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5644                                 nl80211_mlme_mcgrp.id, gfp);
5645         return;
5646
5647  nla_put_failure:
5648         genlmsg_cancel(msg, hdr);
5649         nlmsg_free(msg);
5650 }
5651
5652 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5653                                struct net_device *netdev, const u8 *addr,
5654                                gfp_t gfp)
5655 {
5656         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5657                                   addr, gfp);
5658 }
5659
5660 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5661                                 struct net_device *netdev, const u8 *addr,
5662                                 gfp_t gfp)
5663 {
5664         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5665                                   addr, gfp);
5666 }
5667
5668 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5669                                  struct net_device *netdev, const u8 *bssid,
5670                                  const u8 *req_ie, size_t req_ie_len,
5671                                  const u8 *resp_ie, size_t resp_ie_len,
5672                                  u16 status, gfp_t gfp)
5673 {
5674         struct sk_buff *msg;
5675         void *hdr;
5676
5677         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5678         if (!msg)
5679                 return;
5680
5681         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5682         if (!hdr) {
5683                 nlmsg_free(msg);
5684                 return;
5685         }
5686
5687         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5688         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5689         if (bssid)
5690                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5691         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5692         if (req_ie)
5693                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5694         if (resp_ie)
5695                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5696
5697         if (genlmsg_end(msg, hdr) < 0) {
5698                 nlmsg_free(msg);
5699                 return;
5700         }
5701
5702         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5703                                 nl80211_mlme_mcgrp.id, gfp);
5704         return;
5705
5706  nla_put_failure:
5707         genlmsg_cancel(msg, hdr);
5708         nlmsg_free(msg);
5709
5710 }
5711
5712 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5713                          struct net_device *netdev, const u8 *bssid,
5714                          const u8 *req_ie, size_t req_ie_len,
5715                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5716 {
5717         struct sk_buff *msg;
5718         void *hdr;
5719
5720         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5721         if (!msg)
5722                 return;
5723
5724         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5725         if (!hdr) {
5726                 nlmsg_free(msg);
5727                 return;
5728         }
5729
5730         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5731         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5732         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5733         if (req_ie)
5734                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5735         if (resp_ie)
5736                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5737
5738         if (genlmsg_end(msg, hdr) < 0) {
5739                 nlmsg_free(msg);
5740                 return;
5741         }
5742
5743         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5744                                 nl80211_mlme_mcgrp.id, gfp);
5745         return;
5746
5747  nla_put_failure:
5748         genlmsg_cancel(msg, hdr);
5749         nlmsg_free(msg);
5750
5751 }
5752
5753 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5754                                struct net_device *netdev, u16 reason,
5755                                const u8 *ie, size_t ie_len, bool from_ap)
5756 {
5757         struct sk_buff *msg;
5758         void *hdr;
5759
5760         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5761         if (!msg)
5762                 return;
5763
5764         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5765         if (!hdr) {
5766                 nlmsg_free(msg);
5767                 return;
5768         }
5769
5770         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5771         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5772         if (from_ap && reason)
5773                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5774         if (from_ap)
5775                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5776         if (ie)
5777                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5778
5779         if (genlmsg_end(msg, hdr) < 0) {
5780                 nlmsg_free(msg);
5781                 return;
5782         }
5783
5784         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5785                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5786         return;
5787
5788  nla_put_failure:
5789         genlmsg_cancel(msg, hdr);
5790         nlmsg_free(msg);
5791
5792 }
5793
5794 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5795                              struct net_device *netdev, const u8 *bssid,
5796                              gfp_t gfp)
5797 {
5798         struct sk_buff *msg;
5799         void *hdr;
5800
5801         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5802         if (!msg)
5803                 return;
5804
5805         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5806         if (!hdr) {
5807                 nlmsg_free(msg);
5808                 return;
5809         }
5810
5811         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5812         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5813         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5814
5815         if (genlmsg_end(msg, hdr) < 0) {
5816                 nlmsg_free(msg);
5817                 return;
5818         }
5819
5820         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5821                                 nl80211_mlme_mcgrp.id, gfp);
5822         return;
5823
5824  nla_put_failure:
5825         genlmsg_cancel(msg, hdr);
5826         nlmsg_free(msg);
5827 }
5828
5829 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5830                                  struct net_device *netdev, const u8 *addr,
5831                                  enum nl80211_key_type key_type, int key_id,
5832                                  const u8 *tsc, gfp_t gfp)
5833 {
5834         struct sk_buff *msg;
5835         void *hdr;
5836
5837         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5838         if (!msg)
5839                 return;
5840
5841         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5842         if (!hdr) {
5843                 nlmsg_free(msg);
5844                 return;
5845         }
5846
5847         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5848         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5849         if (addr)
5850                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5851         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5852         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5853         if (tsc)
5854                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5855
5856         if (genlmsg_end(msg, hdr) < 0) {
5857                 nlmsg_free(msg);
5858                 return;
5859         }
5860
5861         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5862                                 nl80211_mlme_mcgrp.id, gfp);
5863         return;
5864
5865  nla_put_failure:
5866         genlmsg_cancel(msg, hdr);
5867         nlmsg_free(msg);
5868 }
5869
5870 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5871                                     struct ieee80211_channel *channel_before,
5872                                     struct ieee80211_channel *channel_after)
5873 {
5874         struct sk_buff *msg;
5875         void *hdr;
5876         struct nlattr *nl_freq;
5877
5878         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5879         if (!msg)
5880                 return;
5881
5882         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5883         if (!hdr) {
5884                 nlmsg_free(msg);
5885                 return;
5886         }
5887
5888         /*
5889          * Since we are applying the beacon hint to a wiphy we know its
5890          * wiphy_idx is valid
5891          */
5892         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5893
5894         /* Before */
5895         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5896         if (!nl_freq)
5897                 goto nla_put_failure;
5898         if (nl80211_msg_put_channel(msg, channel_before))
5899                 goto nla_put_failure;
5900         nla_nest_end(msg, nl_freq);
5901
5902         /* After */
5903         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5904         if (!nl_freq)
5905                 goto nla_put_failure;
5906         if (nl80211_msg_put_channel(msg, channel_after))
5907                 goto nla_put_failure;
5908         nla_nest_end(msg, nl_freq);
5909
5910         if (genlmsg_end(msg, hdr) < 0) {
5911                 nlmsg_free(msg);
5912                 return;
5913         }
5914
5915         rcu_read_lock();
5916         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5917                                 GFP_ATOMIC);
5918         rcu_read_unlock();
5919
5920         return;
5921
5922 nla_put_failure:
5923         genlmsg_cancel(msg, hdr);
5924         nlmsg_free(msg);
5925 }
5926
5927 static void nl80211_send_remain_on_chan_event(
5928         int cmd, struct cfg80211_registered_device *rdev,
5929         struct net_device *netdev, u64 cookie,
5930         struct ieee80211_channel *chan,
5931         enum nl80211_channel_type channel_type,
5932         unsigned int duration, gfp_t gfp)
5933 {
5934         struct sk_buff *msg;
5935         void *hdr;
5936
5937         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5938         if (!msg)
5939                 return;
5940
5941         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5942         if (!hdr) {
5943                 nlmsg_free(msg);
5944                 return;
5945         }
5946
5947         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5948         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5949         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5950         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5951         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5952
5953         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5954                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5955
5956         if (genlmsg_end(msg, hdr) < 0) {
5957                 nlmsg_free(msg);
5958                 return;
5959         }
5960
5961         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5962                                 nl80211_mlme_mcgrp.id, gfp);
5963         return;
5964
5965  nla_put_failure:
5966         genlmsg_cancel(msg, hdr);
5967         nlmsg_free(msg);
5968 }
5969
5970 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5971                                     struct net_device *netdev, u64 cookie,
5972                                     struct ieee80211_channel *chan,
5973                                     enum nl80211_channel_type channel_type,
5974                                     unsigned int duration, gfp_t gfp)
5975 {
5976         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5977                                           rdev, netdev, cookie, chan,
5978                                           channel_type, duration, gfp);
5979 }
5980
5981 void nl80211_send_remain_on_channel_cancel(
5982         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5983         u64 cookie, struct ieee80211_channel *chan,
5984         enum nl80211_channel_type channel_type, gfp_t gfp)
5985 {
5986         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5987                                           rdev, netdev, cookie, chan,
5988                                           channel_type, 0, gfp);
5989 }
5990
5991 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5992                             struct net_device *dev, const u8 *mac_addr,
5993                             struct station_info *sinfo, gfp_t gfp)
5994 {
5995         struct sk_buff *msg;
5996
5997         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5998         if (!msg)
5999                 return;
6000
6001         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6002                 nlmsg_free(msg);
6003                 return;
6004         }
6005
6006         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6007                                 nl80211_mlme_mcgrp.id, gfp);
6008 }
6009
6010 int nl80211_send_action(struct cfg80211_registered_device *rdev,
6011                         struct net_device *netdev, u32 nlpid,
6012                         int freq, const u8 *buf, size_t len, gfp_t gfp)
6013 {
6014         struct sk_buff *msg;
6015         void *hdr;
6016         int err;
6017
6018         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6019         if (!msg)
6020                 return -ENOMEM;
6021
6022         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
6023         if (!hdr) {
6024                 nlmsg_free(msg);
6025                 return -ENOMEM;
6026         }
6027
6028         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6029         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6030         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6031         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6032
6033         err = genlmsg_end(msg, hdr);
6034         if (err < 0) {
6035                 nlmsg_free(msg);
6036                 return err;
6037         }
6038
6039         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6040         if (err < 0)
6041                 return err;
6042         return 0;
6043
6044  nla_put_failure:
6045         genlmsg_cancel(msg, hdr);
6046         nlmsg_free(msg);
6047         return -ENOBUFS;
6048 }
6049
6050 void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
6051                                    struct net_device *netdev, u64 cookie,
6052                                    const u8 *buf, size_t len, bool ack,
6053                                    gfp_t gfp)
6054 {
6055         struct sk_buff *msg;
6056         void *hdr;
6057
6058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6059         if (!msg)
6060                 return;
6061
6062         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
6063         if (!hdr) {
6064                 nlmsg_free(msg);
6065                 return;
6066         }
6067
6068         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6069         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6070         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6071         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6072         if (ack)
6073                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6074
6075         if (genlmsg_end(msg, hdr) < 0) {
6076                 nlmsg_free(msg);
6077                 return;
6078         }
6079
6080         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6081         return;
6082
6083  nla_put_failure:
6084         genlmsg_cancel(msg, hdr);
6085         nlmsg_free(msg);
6086 }
6087
6088 void
6089 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6090                              struct net_device *netdev,
6091                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6092                              gfp_t gfp)
6093 {
6094         struct sk_buff *msg;
6095         struct nlattr *pinfoattr;
6096         void *hdr;
6097
6098         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6099         if (!msg)
6100                 return;
6101
6102         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6103         if (!hdr) {
6104                 nlmsg_free(msg);
6105                 return;
6106         }
6107
6108         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6109         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6110
6111         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6112         if (!pinfoattr)
6113                 goto nla_put_failure;
6114
6115         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6116                     rssi_event);
6117
6118         nla_nest_end(msg, pinfoattr);
6119
6120         if (genlmsg_end(msg, hdr) < 0) {
6121                 nlmsg_free(msg);
6122                 return;
6123         }
6124
6125         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6126                                 nl80211_mlme_mcgrp.id, gfp);
6127         return;
6128
6129  nla_put_failure:
6130         genlmsg_cancel(msg, hdr);
6131         nlmsg_free(msg);
6132 }
6133
6134 static int nl80211_netlink_notify(struct notifier_block * nb,
6135                                   unsigned long state,
6136                                   void *_notify)
6137 {
6138         struct netlink_notify *notify = _notify;
6139         struct cfg80211_registered_device *rdev;
6140         struct wireless_dev *wdev;
6141
6142         if (state != NETLINK_URELEASE)
6143                 return NOTIFY_DONE;
6144
6145         rcu_read_lock();
6146
6147         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6148                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6149                         cfg80211_mlme_unregister_actions(wdev, notify->pid);
6150
6151         rcu_read_unlock();
6152
6153         return NOTIFY_DONE;
6154 }
6155
6156 static struct notifier_block nl80211_netlink_notifier = {
6157         .notifier_call = nl80211_netlink_notify,
6158 };
6159
6160 /* initialisation/exit functions */
6161
6162 int nl80211_init(void)
6163 {
6164         int err;
6165
6166         err = genl_register_family_with_ops(&nl80211_fam,
6167                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6168         if (err)
6169                 return err;
6170
6171         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6172         if (err)
6173                 goto err_out;
6174
6175         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6176         if (err)
6177                 goto err_out;
6178
6179         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6180         if (err)
6181                 goto err_out;
6182
6183         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6184         if (err)
6185                 goto err_out;
6186
6187 #ifdef CONFIG_NL80211_TESTMODE
6188         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6189         if (err)
6190                 goto err_out;
6191 #endif
6192
6193         err = netlink_register_notifier(&nl80211_netlink_notifier);
6194         if (err)
6195                 goto err_out;
6196
6197         return 0;
6198  err_out:
6199         genl_unregister_family(&nl80211_fam);
6200         return err;
6201 }
6202
6203 void nl80211_exit(void)
6204 {
6205         netlink_unregister_notifier(&nl80211_netlink_notifier);
6206         genl_unregister_family(&nl80211_fam);
6207 }