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/list.h>
  11 #include <linux/if_ether.h>
  12 #include <linux/ieee80211.h>
  13 #include <linux/nl80211.h>
  14 #include <linux/rtnetlink.h>
  15 #include <linux/netlink.h>
  16 #include <linux/etherdevice.h>
  17 #include <net/net_namespace.h>
  18 #include <net/genetlink.h>
  19 #include <net/cfg80211.h>
  20 #include <net/sock.h>
  21 #include "core.h"
  22 #include "nl80211.h"
  23 #include "reg.h"
  24
  25 /* the netlink family */
  26 static struct genl_family nl80211_fam = {
  27         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  28         .name = "nl80211",      /* have users key off the name instead */
  29         .hdrsize = 0,           /* no private header */
  30         .version = 1,           /* no particular meaning now */
  31         .maxattr = NL80211_ATTR_MAX,
  32         .netnsok = true,
  33 };
  34
  35 /* internal helper: get rdev and dev */
  36 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  37                                        struct cfg80211_registered_device **rdev,
  38                                        struct net_device **dev)
  39 {
  40         struct nlattr **attrs = info->attrs;
  41         int ifindex;
  42
  43         if (!attrs[NL80211_ATTR_IFINDEX])
  44                 return -EINVAL;
  45
  46         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  47         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  48         if (!*dev)
  49                 return -ENODEV;
  50
  51         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  52         if (IS_ERR(*rdev)) {
  53                 dev_put(*dev);
  54                 return PTR_ERR(*rdev);
  55         }
  56
  57         return 0;
  58 }
  59
  60 /* policy for the attributes */
  61 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  62         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  63         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  64                                       .len = 20-1 },
  65         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  66         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  67         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  69         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  72         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  73
  74         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  75         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  76         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  77
  78         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  79         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  80
  81         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  82         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  83                                     .len = WLAN_MAX_KEY_LEN },
  84         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  85         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  86         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  87         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  88
  89         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  90         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  91         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  92                                        .len = IEEE80211_MAX_DATA_LEN },
  93         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  94                                        .len = IEEE80211_MAX_DATA_LEN },
  95         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  96         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  97         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  98         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  99                                                .len = NL80211_MAX_SUPP_RATES },
 100         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 101         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 102         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 103         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 104                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 105         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 106
 107         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 108         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 109
 110         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 111         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 113         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 114                                            .len = NL80211_MAX_SUPP_RATES },
 115
 116         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 117
 118         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 119                                          .len = NL80211_HT_CAPABILITY_LEN },
 120
 121         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 122         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 123                               .len = IEEE80211_MAX_DATA_LEN },
 124         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 125         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 126
 127         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 128                                 .len = IEEE80211_MAX_SSID_LEN },
 129         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 130         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 131         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 132         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 134         [NL80211_ATTR_STA_FLAGS2] = {
 135                 .len = sizeof(struct nl80211_sta_flag_update),
 136         },
 137         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 138         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 139         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 140         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 141         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 142         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 143         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 144                                  .len = WLAN_PMKID_LEN },
 145         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 146         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 147         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 148         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 149                                  .len = IEEE80211_MAX_DATA_LEN },
 150         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 151         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 152 };
 153
 154 /* policy for the attributes */
 155 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 156         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 157         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 158         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 159         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 160         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 161         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 162 };
 163
 164 /* ifidx get helper */
 165 static int nl80211_get_ifidx(struct netlink_callback *cb)
 166 {
 167         int res;
 168
 169         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 170                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 171                           nl80211_policy);
 172         if (res)
 173                 return res;
 174
 175         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 176                 return -EINVAL;
 177
 178         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 179         if (!res)
 180                 return -EINVAL;
 181         return res;
 182 }
 183
 184 /* IE validation */
 185 static bool is_valid_ie_attr(const struct nlattr *attr)
 186 {
 187         const u8 *pos;
 188         int len;
 189
 190         if (!attr)
 191                 return true;
 192
 193         pos = nla_data(attr);
 194         len = nla_len(attr);
 195
 196         while (len) {
 197                 u8 elemlen;
 198
 199                 if (len < 2)
 200                         return false;
 201                 len -= 2;
 202
 203                 elemlen = pos[1];
 204                 if (elemlen > len)
 205                         return false;
 206
 207                 len -= elemlen;
 208                 pos += 2 + elemlen;
 209         }
 210
 211         return true;
 212 }
 213
 214 /* message building helper */
 215 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 216                                    int flags, u8 cmd)
 217 {
 218         /* since there is no private header just add the generic one */
 219         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 220 }
 221
 222 static int nl80211_msg_put_channel(struct sk_buff *msg,
 223                                    struct ieee80211_channel *chan)
 224 {
 225         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 226                     chan->center_freq);
 227
 228         if (chan->flags & IEEE80211_CHAN_DISABLED)
 229                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 230         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 231                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 232         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 233                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 234         if (chan->flags & IEEE80211_CHAN_RADAR)
 235                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 236
 237         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 238                     DBM_TO_MBM(chan->max_power));
 239
 240         return 0;
 241
 242  nla_put_failure:
 243         return -ENOBUFS;
 244 }
 245
 246 /* netlink command implementations */
 247
 248 struct key_parse {
 249         struct key_params p;
 250         int idx;
 251         bool def, defmgmt;
 252 };
 253
 254 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 255 {
 256         struct nlattr *tb[NL80211_KEY_MAX + 1];
 257         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 258                                    nl80211_key_policy);
 259         if (err)
 260                 return err;
 261
 262         k->def = !!tb[NL80211_KEY_DEFAULT];
 263         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 264
 265         if (tb[NL80211_KEY_IDX])
 266                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 267
 268         if (tb[NL80211_KEY_DATA]) {
 269                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 270                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 271         }
 272
 273         if (tb[NL80211_KEY_SEQ]) {
 274                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 275                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 276         }
 277
 278         if (tb[NL80211_KEY_CIPHER])
 279                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 280
 281         return 0;
 282 }
 283
 284 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 285 {
 286         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 287                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 288                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 289         }
 290
 291         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 292                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 293                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 294         }
 295
 296         if (info->attrs[NL80211_ATTR_KEY_IDX])
 297                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 298
 299         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 300                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 301
 302         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 303         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 304
 305         return 0;
 306 }
 307
 308 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 309 {
 310         int err;
 311
 312         memset(k, 0, sizeof(*k));
 313         k->idx = -1;
 314
 315         if (info->attrs[NL80211_ATTR_KEY])
 316                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 317         else
 318                 err = nl80211_parse_key_old(info, k);
 319
 320         if (err)
 321                 return err;
 322
 323         if (k->def && k->defmgmt)
 324                 return -EINVAL;
 325
 326         if (k->idx != -1) {
 327                 if (k->defmgmt) {
 328                         if (k->idx < 4 || k->idx > 5)
 329                                 return -EINVAL;
 330                 } else if (k->def) {
 331                         if (k->idx < 0 || k->idx > 3)
 332                                 return -EINVAL;
 333                 } else {
 334                         if (k->idx < 0 || k->idx > 5)
 335                                 return -EINVAL;
 336                 }
 337         }
 338
 339         return 0;
 340 }
 341
 342 static struct cfg80211_cached_keys *
 343 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 344                        struct nlattr *keys)
 345 {
 346         struct key_parse parse;
 347         struct nlattr *key;
 348         struct cfg80211_cached_keys *result;
 349         int rem, err, def = 0;
 350
 351         result = kzalloc(sizeof(*result), GFP_KERNEL);
 352         if (!result)
 353                 return ERR_PTR(-ENOMEM);
 354
 355         result->def = -1;
 356         result->defmgmt = -1;
 357
 358         nla_for_each_nested(key, keys, rem) {
 359                 memset(&parse, 0, sizeof(parse));
 360                 parse.idx = -1;
 361
 362                 err = nl80211_parse_key_new(key, &parse);
 363                 if (err)
 364                         goto error;
 365                 err = -EINVAL;
 366                 if (!parse.p.key)
 367                         goto error;
 368                 if (parse.idx < 0 || parse.idx > 4)
 369                         goto error;
 370                 if (parse.def) {
 371                         if (def)
 372                                 goto error;
 373                         def = 1;
 374                         result->def = parse.idx;
 375                 } else if (parse.defmgmt)
 376                         goto error;
 377                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 378                                                      parse.idx, NULL);
 379                 if (err)
 380                         goto error;
 381                 result->params[parse.idx].cipher = parse.p.cipher;
 382                 result->params[parse.idx].key_len = parse.p.key_len;
 383                 result->params[parse.idx].key = result->data[parse.idx];
 384                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 385         }
 386
 387         return result;
 388  error:
 389         kfree(result);
 390         return ERR_PTR(err);
 391 }
 392
 393 static int nl80211_key_allowed(struct wireless_dev *wdev)
 394 {
 395         ASSERT_WDEV_LOCK(wdev);
 396
 397         if (!netif_running(wdev->netdev))
 398                 return -ENETDOWN;
 399
 400         switch (wdev->iftype) {
 401         case NL80211_IFTYPE_AP:
 402         case NL80211_IFTYPE_AP_VLAN:
 403                 break;
 404         case NL80211_IFTYPE_ADHOC:
 405                 if (!wdev->current_bss)
 406                         return -ENOLINK;
 407                 break;
 408         case NL80211_IFTYPE_STATION:
 409                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 410                         return -ENOLINK;
 411                 break;
 412         default:
 413                 return -EINVAL;
 414         }
 415
 416         return 0;
 417 }
 418
 419 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 420                               struct cfg80211_registered_device *dev)
 421 {
 422         void *hdr;
 423         struct nlattr *nl_bands, *nl_band;
 424         struct nlattr *nl_freqs, *nl_freq;
 425         struct nlattr *nl_rates, *nl_rate;
 426         struct nlattr *nl_modes;
 427         struct nlattr *nl_cmds;
 428         enum ieee80211_band band;
 429         struct ieee80211_channel *chan;
 430         struct ieee80211_rate *rate;
 431         int i;
 432         u16 ifmodes = dev->wiphy.interface_modes;
 433
 434         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 435         if (!hdr)
 436                 return -1;
 437
 438         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 439         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 440
 441         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 442                     cfg80211_rdev_list_generation);
 443
 444         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 445                    dev->wiphy.retry_short);
 446         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 447                    dev->wiphy.retry_long);
 448         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 449                     dev->wiphy.frag_threshold);
 450         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 451                     dev->wiphy.rts_threshold);
 452         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 453                     dev->wiphy.coverage_class);
 454
 455         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 456                    dev->wiphy.max_scan_ssids);
 457         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 458                     dev->wiphy.max_scan_ie_len);
 459
 460         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 461                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 462                 dev->wiphy.cipher_suites);
 463
 464         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 465                    dev->wiphy.max_num_pmkids);
 466
 467         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 468         if (!nl_modes)
 469                 goto nla_put_failure;
 470
 471         i = 0;
 472         while (ifmodes) {
 473                 if (ifmodes & 1)
 474                         NLA_PUT_FLAG(msg, i);
 475                 ifmodes >>= 1;
 476                 i++;
 477         }
 478
 479         nla_nest_end(msg, nl_modes);
 480
 481         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 482         if (!nl_bands)
 483                 goto nla_put_failure;
 484
 485         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 486                 if (!dev->wiphy.bands[band])
 487                         continue;
 488
 489                 nl_band = nla_nest_start(msg, band);
 490                 if (!nl_band)
 491                         goto nla_put_failure;
 492
 493                 /* add HT info */
 494                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 495                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 496                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 497                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 498                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 499                                 dev->wiphy.bands[band]->ht_cap.cap);
 500                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 501                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 502                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 503                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 504                 }
 505
 506                 /* add frequencies */
 507                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 508                 if (!nl_freqs)
 509                         goto nla_put_failure;
 510
 511                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 512                         nl_freq = nla_nest_start(msg, i);
 513                         if (!nl_freq)
 514                                 goto nla_put_failure;
 515
 516                         chan = &dev->wiphy.bands[band]->channels[i];
 517
 518                         if (nl80211_msg_put_channel(msg, chan))
 519                                 goto nla_put_failure;
 520
 521                         nla_nest_end(msg, nl_freq);
 522                 }
 523
 524                 nla_nest_end(msg, nl_freqs);
 525
 526                 /* add bitrates */
 527                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 528                 if (!nl_rates)
 529                         goto nla_put_failure;
 530
 531                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 532                         nl_rate = nla_nest_start(msg, i);
 533                         if (!nl_rate)
 534                                 goto nla_put_failure;
 535
 536                         rate = &dev->wiphy.bands[band]->bitrates[i];
 537                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 538                                     rate->bitrate);
 539                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 540                                 NLA_PUT_FLAG(msg,
 541                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 542
 543                         nla_nest_end(msg, nl_rate);
 544                 }
 545
 546                 nla_nest_end(msg, nl_rates);
 547
 548                 nla_nest_end(msg, nl_band);
 549         }
 550         nla_nest_end(msg, nl_bands);
 551
 552         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 553         if (!nl_cmds)
 554                 goto nla_put_failure;
 555
 556         i = 0;
 557 #define CMD(op, n)                                              \
 558          do {                                                   \
 559                 if (dev->ops->op) {                             \
 560                         i++;                                    \
 561                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 562                 }                                               \
 563         } while (0)
 564
 565         CMD(add_virtual_intf, NEW_INTERFACE);
 566         CMD(change_virtual_intf, SET_INTERFACE);
 567         CMD(add_key, NEW_KEY);
 568         CMD(add_beacon, NEW_BEACON);
 569         CMD(add_station, NEW_STATION);
 570         CMD(add_mpath, NEW_MPATH);
 571         CMD(set_mesh_params, SET_MESH_PARAMS);
 572         CMD(change_bss, SET_BSS);
 573         CMD(auth, AUTHENTICATE);
 574         CMD(assoc, ASSOCIATE);
 575         CMD(deauth, DEAUTHENTICATE);
 576         CMD(disassoc, DISASSOCIATE);
 577         CMD(join_ibss, JOIN_IBSS);
 578         CMD(set_pmksa, SET_PMKSA);
 579         CMD(del_pmksa, DEL_PMKSA);
 580         CMD(flush_pmksa, FLUSH_PMKSA);
 581         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 582         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 583         CMD(action, ACTION);
 584         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 585                 i++;
 586                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 587         }
 588
 589 #undef CMD
 590
 591         if (dev->ops->connect || dev->ops->auth) {
 592                 i++;
 593                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 594         }
 595
 596         if (dev->ops->disconnect || dev->ops->deauth) {
 597                 i++;
 598                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 599         }
 600
 601         nla_nest_end(msg, nl_cmds);
 602
 603         return genlmsg_end(msg, hdr);
 604
 605  nla_put_failure:
 606         genlmsg_cancel(msg, hdr);
 607         return -EMSGSIZE;
 608 }
 609
 610 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 611 {
 612         int idx = 0;
 613         int start = cb->args[0];
 614         struct cfg80211_registered_device *dev;
 615
 616         mutex_lock(&cfg80211_mutex);
 617         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 618                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 619                         continue;
 620                 if (++idx <= start)
 621                         continue;
 622                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 623                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 624                                        dev) < 0) {
 625                         idx--;
 626                         break;
 627                 }
 628         }
 629         mutex_unlock(&cfg80211_mutex);
 630
 631         cb->args[0] = idx;
 632
 633         return skb->len;
 634 }
 635
 636 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 637 {
 638         struct sk_buff *msg;
 639         struct cfg80211_registered_device *dev;
 640
 641         dev = cfg80211_get_dev_from_info(info);
 642         if (IS_ERR(dev))
 643                 return PTR_ERR(dev);
 644
 645         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 646         if (!msg)
 647                 goto out_err;
 648
 649         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 650                 goto out_free;
 651
 652         cfg80211_unlock_rdev(dev);
 653
 654         return genlmsg_reply(msg, info);
 655
 656  out_free:
 657         nlmsg_free(msg);
 658  out_err:
 659         cfg80211_unlock_rdev(dev);
 660         return -ENOBUFS;
 661 }
 662
 663 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 664         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 665         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 666         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 667         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 668         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 669 };
 670
 671 static int parse_txq_params(struct nlattr *tb[],
 672                             struct ieee80211_txq_params *txq_params)
 673 {
 674         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 675             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 676             !tb[NL80211_TXQ_ATTR_AIFS])
 677                 return -EINVAL;
 678
 679         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 680         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 681         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 682         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 683         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 684
 685         return 0;
 686 }
 687
 688 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 689 {
 690         struct cfg80211_registered_device *rdev;
 691         int result = 0, rem_txq_params = 0;
 692         struct nlattr *nl_txq_params;
 693         u32 changed;
 694         u8 retry_short = 0, retry_long = 0;
 695         u32 frag_threshold = 0, rts_threshold = 0;
 696         u8 coverage_class = 0;
 697
 698         rtnl_lock();
 699
 700         mutex_lock(&cfg80211_mutex);
 701
 702         rdev = __cfg80211_rdev_from_info(info);
 703         if (IS_ERR(rdev)) {
 704                 mutex_unlock(&cfg80211_mutex);
 705                 result = PTR_ERR(rdev);
 706                 goto unlock;
 707         }
 708
 709         mutex_lock(&rdev->mtx);
 710
 711         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 712                 result = cfg80211_dev_rename(
 713                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 714
 715         mutex_unlock(&cfg80211_mutex);
 716
 717         if (result)
 718                 goto bad_res;
 719
 720         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 721                 struct ieee80211_txq_params txq_params;
 722                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 723
 724                 if (!rdev->ops->set_txq_params) {
 725                         result = -EOPNOTSUPP;
 726                         goto bad_res;
 727                 }
 728
 729                 nla_for_each_nested(nl_txq_params,
 730                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 731                                     rem_txq_params) {
 732                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 733                                   nla_data(nl_txq_params),
 734                                   nla_len(nl_txq_params),
 735                                   txq_params_policy);
 736                         result = parse_txq_params(tb, &txq_params);
 737                         if (result)
 738                                 goto bad_res;
 739
 740                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 741                                                            &txq_params);
 742                         if (result)
 743                                 goto bad_res;
 744                 }
 745         }
 746
 747         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 748                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 749                 u32 freq;
 750
 751                 result = -EINVAL;
 752
 753                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 754                         channel_type = nla_get_u32(info->attrs[
 755                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 756                         if (channel_type != NL80211_CHAN_NO_HT &&
 757                             channel_type != NL80211_CHAN_HT20 &&
 758                             channel_type != NL80211_CHAN_HT40PLUS &&
 759                             channel_type != NL80211_CHAN_HT40MINUS)
 760                                 goto bad_res;
 761                 }
 762
 763                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 764
 765                 mutex_lock(&rdev->devlist_mtx);
 766                 result = rdev_set_freq(rdev, NULL, freq, channel_type);
 767                 mutex_unlock(&rdev->devlist_mtx);
 768                 if (result)
 769                         goto bad_res;
 770         }
 771
 772         changed = 0;
 773
 774         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 775                 retry_short = nla_get_u8(
 776                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 777                 if (retry_short == 0) {
 778                         result = -EINVAL;
 779                         goto bad_res;
 780                 }
 781                 changed |= WIPHY_PARAM_RETRY_SHORT;
 782         }
 783
 784         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 785                 retry_long = nla_get_u8(
 786                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 787                 if (retry_long == 0) {
 788                         result = -EINVAL;
 789                         goto bad_res;
 790                 }
 791                 changed |= WIPHY_PARAM_RETRY_LONG;
 792         }
 793
 794         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 795                 frag_threshold = nla_get_u32(
 796                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 797                 if (frag_threshold < 256) {
 798                         result = -EINVAL;
 799                         goto bad_res;
 800                 }
 801                 if (frag_threshold != (u32) -1) {
 802                         /*
 803                          * Fragments (apart from the last one) are required to
 804                          * have even length. Make the fragmentation code
 805                          * simpler by stripping LSB should someone try to use
 806                          * odd threshold value.
 807                          */
 808                         frag_threshold &= ~0x1;
 809                 }
 810                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 811         }
 812
 813         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 814                 rts_threshold = nla_get_u32(
 815                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 816                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 817         }
 818
 819         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 820                 coverage_class = nla_get_u8(
 821                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 822                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
 823         }
 824
 825         if (changed) {
 826                 u8 old_retry_short, old_retry_long;
 827                 u32 old_frag_threshold, old_rts_threshold;
 828                 u8 old_coverage_class;
 829
 830                 if (!rdev->ops->set_wiphy_params) {
 831                         result = -EOPNOTSUPP;
 832                         goto bad_res;
 833                 }
 834
 835                 old_retry_short = rdev->wiphy.retry_short;
 836                 old_retry_long = rdev->wiphy.retry_long;
 837                 old_frag_threshold = rdev->wiphy.frag_threshold;
 838                 old_rts_threshold = rdev->wiphy.rts_threshold;
 839                 old_coverage_class = rdev->wiphy.coverage_class;
 840
 841                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 842                         rdev->wiphy.retry_short = retry_short;
 843                 if (changed & WIPHY_PARAM_RETRY_LONG)
 844                         rdev->wiphy.retry_long = retry_long;
 845                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 846                         rdev->wiphy.frag_threshold = frag_threshold;
 847                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 848                         rdev->wiphy.rts_threshold = rts_threshold;
 849                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
 850                         rdev->wiphy.coverage_class = coverage_class;
 851
 852                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 853                 if (result) {
 854                         rdev->wiphy.retry_short = old_retry_short;
 855                         rdev->wiphy.retry_long = old_retry_long;
 856                         rdev->wiphy.frag_threshold = old_frag_threshold;
 857                         rdev->wiphy.rts_threshold = old_rts_threshold;
 858                         rdev->wiphy.coverage_class = old_coverage_class;
 859                 }
 860         }
 861
 862  bad_res:
 863         mutex_unlock(&rdev->mtx);
 864  unlock:
 865         rtnl_unlock();
 866         return result;
 867 }
 868
 869
 870 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 871                               struct cfg80211_registered_device *rdev,
 872                               struct net_device *dev)
 873 {
 874         void *hdr;
 875
 876         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 877         if (!hdr)
 878                 return -1;
 879
 880         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 881         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 882         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 883         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 884
 885         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 886                     rdev->devlist_generation ^
 887                         (cfg80211_rdev_list_generation << 2));
 888
 889         return genlmsg_end(msg, hdr);
 890
 891  nla_put_failure:
 892         genlmsg_cancel(msg, hdr);
 893         return -EMSGSIZE;
 894 }
 895
 896 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 897 {
 898         int wp_idx = 0;
 899         int if_idx = 0;
 900         int wp_start = cb->args[0];
 901         int if_start = cb->args[1];
 902         struct cfg80211_registered_device *rdev;
 903         struct wireless_dev *wdev;
 904
 905         mutex_lock(&cfg80211_mutex);
 906         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 907                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
 908                         continue;
 909                 if (wp_idx < wp_start) {
 910                         wp_idx++;
 911                         continue;
 912                 }
 913                 if_idx = 0;
 914
 915                 mutex_lock(&rdev->devlist_mtx);
 916                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
 917                         if (if_idx < if_start) {
 918                                 if_idx++;
 919                                 continue;
 920                         }
 921                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 922                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 923                                                rdev, wdev->netdev) < 0) {
 924                                 mutex_unlock(&rdev->devlist_mtx);
 925                                 goto out;
 926                         }
 927                         if_idx++;
 928                 }
 929                 mutex_unlock(&rdev->devlist_mtx);
 930
 931                 wp_idx++;
 932         }
 933  out:
 934         mutex_unlock(&cfg80211_mutex);
 935
 936         cb->args[0] = wp_idx;
 937         cb->args[1] = if_idx;
 938
 939         return skb->len;
 940 }
 941
 942 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 943 {
 944         struct sk_buff *msg;
 945         struct cfg80211_registered_device *dev;
 946         struct net_device *netdev;
 947         int err;
 948
 949         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
 950         if (err)
 951                 return err;
 952
 953         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 954         if (!msg)
 955                 goto out_err;
 956
 957         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
 958                                dev, netdev) < 0)
 959                 goto out_free;
 960
 961         dev_put(netdev);
 962         cfg80211_unlock_rdev(dev);
 963
 964         return genlmsg_reply(msg, info);
 965
 966  out_free:
 967         nlmsg_free(msg);
 968  out_err:
 969         dev_put(netdev);
 970         cfg80211_unlock_rdev(dev);
 971         return -ENOBUFS;
 972 }
 973
 974 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 975         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 976         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 977         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 978         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 979         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 980 };
 981
 982 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 983 {
 984         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 985         int flag;
 986
 987         *mntrflags = 0;
 988
 989         if (!nla)
 990                 return -EINVAL;
 991
 992         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 993                              nla, mntr_flags_policy))
 994                 return -EINVAL;
 995
 996         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 997                 if (flags[flag])
 998                         *mntrflags |= (1<<flag);
 999
1000         return 0;
1001 }
1002
1003 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1004                                struct net_device *netdev, u8 use_4addr,
1005                                enum nl80211_iftype iftype)
1006 {
1007         if (!use_4addr) {
1008                 if (netdev && netdev->br_port)
1009                         return -EBUSY;
1010                 return 0;
1011         }
1012
1013         switch (iftype) {
1014         case NL80211_IFTYPE_AP_VLAN:
1015                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1016                         return 0;
1017                 break;
1018         case NL80211_IFTYPE_STATION:
1019                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1020                         return 0;
1021                 break;
1022         default:
1023                 break;
1024         }
1025
1026         return -EOPNOTSUPP;
1027 }
1028
1029 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1030 {
1031         struct cfg80211_registered_device *rdev;
1032         struct vif_params params;
1033         int err;
1034         enum nl80211_iftype otype, ntype;
1035         struct net_device *dev;
1036         u32 _flags, *flags = NULL;
1037         bool change = false;
1038
1039         memset(&params, 0, sizeof(params));
1040
1041         rtnl_lock();
1042
1043         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1044         if (err)
1045                 goto unlock_rtnl;
1046
1047         otype = ntype = dev->ieee80211_ptr->iftype;
1048
1049         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1050                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1051                 if (otype != ntype)
1052                         change = true;
1053                 if (ntype > NL80211_IFTYPE_MAX) {
1054                         err = -EINVAL;
1055                         goto unlock;
1056                 }
1057         }
1058
1059         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1060                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1061                         err = -EINVAL;
1062                         goto unlock;
1063                 }
1064                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1065                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1066                 change = true;
1067         }
1068
1069         if (info->attrs[NL80211_ATTR_4ADDR]) {
1070                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1071                 change = true;
1072                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1073                 if (err)
1074                         goto unlock;
1075         } else {
1076                 params.use_4addr = -1;
1077         }
1078
1079         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1080                 if (ntype != NL80211_IFTYPE_MONITOR) {
1081                         err = -EINVAL;
1082                         goto unlock;
1083                 }
1084                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1085                                           &_flags);
1086                 if (err)
1087                         goto unlock;
1088
1089                 flags = &_flags;
1090                 change = true;
1091         }
1092
1093         if (change)
1094                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1095         else
1096                 err = 0;
1097
1098         if (!err && params.use_4addr != -1)
1099                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1100
1101  unlock:
1102         dev_put(dev);
1103         cfg80211_unlock_rdev(rdev);
1104  unlock_rtnl:
1105         rtnl_unlock();
1106         return err;
1107 }
1108
1109 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1110 {
1111         struct cfg80211_registered_device *rdev;
1112         struct vif_params params;
1113         int err;
1114         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1115         u32 flags;
1116
1117         memset(&params, 0, sizeof(params));
1118
1119         if (!info->attrs[NL80211_ATTR_IFNAME])
1120                 return -EINVAL;
1121
1122         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1123                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1124                 if (type > NL80211_IFTYPE_MAX)
1125                         return -EINVAL;
1126         }
1127
1128         rtnl_lock();
1129
1130         rdev = cfg80211_get_dev_from_info(info);
1131         if (IS_ERR(rdev)) {
1132                 err = PTR_ERR(rdev);
1133                 goto unlock_rtnl;
1134         }
1135
1136         if (!rdev->ops->add_virtual_intf ||
1137             !(rdev->wiphy.interface_modes & (1 << type))) {
1138                 err = -EOPNOTSUPP;
1139                 goto unlock;
1140         }
1141
1142         if (type == NL80211_IFTYPE_MESH_POINT &&
1143             info->attrs[NL80211_ATTR_MESH_ID]) {
1144                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1145                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1146         }
1147
1148         if (info->attrs[NL80211_ATTR_4ADDR]) {
1149                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1150                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1151                 if (err)
1152                         goto unlock;
1153         }
1154
1155         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1156                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1157                                   &flags);
1158         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1159                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1160                 type, err ? NULL : &flags, &params);
1161
1162  unlock:
1163         cfg80211_unlock_rdev(rdev);
1164  unlock_rtnl:
1165         rtnl_unlock();
1166         return err;
1167 }
1168
1169 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1170 {
1171         struct cfg80211_registered_device *rdev;
1172         int err;
1173         struct net_device *dev;
1174
1175         rtnl_lock();
1176
1177         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1178         if (err)
1179                 goto unlock_rtnl;
1180
1181         if (!rdev->ops->del_virtual_intf) {
1182                 err = -EOPNOTSUPP;
1183                 goto out;
1184         }
1185
1186         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1187
1188  out:
1189         cfg80211_unlock_rdev(rdev);
1190         dev_put(dev);
1191  unlock_rtnl:
1192         rtnl_unlock();
1193         return err;
1194 }
1195
1196 struct get_key_cookie {
1197         struct sk_buff *msg;
1198         int error;
1199         int idx;
1200 };
1201
1202 static void get_key_callback(void *c, struct key_params *params)
1203 {
1204         struct nlattr *key;
1205         struct get_key_cookie *cookie = c;
1206
1207         if (params->key)
1208                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1209                         params->key_len, params->key);
1210
1211         if (params->seq)
1212                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1213                         params->seq_len, params->seq);
1214
1215         if (params->cipher)
1216                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1217                             params->cipher);
1218
1219         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1220         if (!key)
1221                 goto nla_put_failure;
1222
1223         if (params->key)
1224                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1225                         params->key_len, params->key);
1226
1227         if (params->seq)
1228                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1229                         params->seq_len, params->seq);
1230
1231         if (params->cipher)
1232                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1233                             params->cipher);
1234
1235         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1236
1237         nla_nest_end(cookie->msg, key);
1238
1239         return;
1240  nla_put_failure:
1241         cookie->error = 1;
1242 }
1243
1244 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1245 {
1246         struct cfg80211_registered_device *rdev;
1247         int err;
1248         struct net_device *dev;
1249         u8 key_idx = 0;
1250         u8 *mac_addr = NULL;
1251         struct get_key_cookie cookie = {
1252                 .error = 0,
1253         };
1254         void *hdr;
1255         struct sk_buff *msg;
1256
1257         if (info->attrs[NL80211_ATTR_KEY_IDX])
1258                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1259
1260         if (key_idx > 5)
1261                 return -EINVAL;
1262
1263         if (info->attrs[NL80211_ATTR_MAC])
1264                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1265
1266         rtnl_lock();
1267
1268         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1269         if (err)
1270                 goto unlock_rtnl;
1271
1272         if (!rdev->ops->get_key) {
1273                 err = -EOPNOTSUPP;
1274                 goto out;
1275         }
1276
1277         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1278         if (!msg) {
1279                 err = -ENOMEM;
1280                 goto out;
1281         }
1282
1283         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1284                              NL80211_CMD_NEW_KEY);
1285
1286         if (IS_ERR(hdr)) {
1287                 err = PTR_ERR(hdr);
1288                 goto free_msg;
1289         }
1290
1291         cookie.msg = msg;
1292         cookie.idx = key_idx;
1293
1294         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1295         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1296         if (mac_addr)
1297                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1298
1299         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1300                                 &cookie, get_key_callback);
1301
1302         if (err)
1303                 goto free_msg;
1304
1305         if (cookie.error)
1306                 goto nla_put_failure;
1307
1308         genlmsg_end(msg, hdr);
1309         err = genlmsg_reply(msg, info);
1310         goto out;
1311
1312  nla_put_failure:
1313         err = -ENOBUFS;
1314  free_msg:
1315         nlmsg_free(msg);
1316  out:
1317         cfg80211_unlock_rdev(rdev);
1318         dev_put(dev);
1319  unlock_rtnl:
1320         rtnl_unlock();
1321
1322         return err;
1323 }
1324
1325 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1326 {
1327         struct cfg80211_registered_device *rdev;
1328         struct key_parse key;
1329         int err;
1330         struct net_device *dev;
1331         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1332                     u8 key_index);
1333
1334         err = nl80211_parse_key(info, &key);
1335         if (err)
1336                 return err;
1337
1338         if (key.idx < 0)
1339                 return -EINVAL;
1340
1341         /* only support setting default key */
1342         if (!key.def && !key.defmgmt)
1343                 return -EINVAL;
1344
1345         rtnl_lock();
1346
1347         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1348         if (err)
1349                 goto unlock_rtnl;
1350
1351         if (key.def)
1352                 func = rdev->ops->set_default_key;
1353         else
1354                 func = rdev->ops->set_default_mgmt_key;
1355
1356         if (!func) {
1357                 err = -EOPNOTSUPP;
1358                 goto out;
1359         }
1360
1361         wdev_lock(dev->ieee80211_ptr);
1362         err = nl80211_key_allowed(dev->ieee80211_ptr);
1363         if (!err)
1364                 err = func(&rdev->wiphy, dev, key.idx);
1365
1366 #ifdef CONFIG_CFG80211_WEXT
1367         if (!err) {
1368                 if (func == rdev->ops->set_default_key)
1369                         dev->ieee80211_ptr->wext.default_key = key.idx;
1370                 else
1371                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1372         }
1373 #endif
1374         wdev_unlock(dev->ieee80211_ptr);
1375
1376  out:
1377         cfg80211_unlock_rdev(rdev);
1378         dev_put(dev);
1379
1380  unlock_rtnl:
1381         rtnl_unlock();
1382
1383         return err;
1384 }
1385
1386 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1387 {
1388         struct cfg80211_registered_device *rdev;
1389         int err;
1390         struct net_device *dev;
1391         struct key_parse key;
1392         u8 *mac_addr = NULL;
1393
1394         err = nl80211_parse_key(info, &key);
1395         if (err)
1396                 return err;
1397
1398         if (!key.p.key)
1399                 return -EINVAL;
1400
1401         if (info->attrs[NL80211_ATTR_MAC])
1402                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1403
1404         rtnl_lock();
1405
1406         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1407         if (err)
1408                 goto unlock_rtnl;
1409
1410         if (!rdev->ops->add_key) {
1411                 err = -EOPNOTSUPP;
1412                 goto out;
1413         }
1414
1415         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1416                 err = -EINVAL;
1417                 goto out;
1418         }
1419
1420         wdev_lock(dev->ieee80211_ptr);
1421         err = nl80211_key_allowed(dev->ieee80211_ptr);
1422         if (!err)
1423                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1424                                          mac_addr, &key.p);
1425         wdev_unlock(dev->ieee80211_ptr);
1426
1427  out:
1428         cfg80211_unlock_rdev(rdev);
1429         dev_put(dev);
1430  unlock_rtnl:
1431         rtnl_unlock();
1432
1433         return err;
1434 }
1435
1436 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1437 {
1438         struct cfg80211_registered_device *rdev;
1439         int err;
1440         struct net_device *dev;
1441         u8 *mac_addr = NULL;
1442         struct key_parse key;
1443
1444         err = nl80211_parse_key(info, &key);
1445         if (err)
1446                 return err;
1447
1448         if (info->attrs[NL80211_ATTR_MAC])
1449                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1450
1451         rtnl_lock();
1452
1453         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1454         if (err)
1455                 goto unlock_rtnl;
1456
1457         if (!rdev->ops->del_key) {
1458                 err = -EOPNOTSUPP;
1459                 goto out;
1460         }
1461
1462         wdev_lock(dev->ieee80211_ptr);
1463         err = nl80211_key_allowed(dev->ieee80211_ptr);
1464         if (!err)
1465                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1466
1467 #ifdef CONFIG_CFG80211_WEXT
1468         if (!err) {
1469                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1470                         dev->ieee80211_ptr->wext.default_key = -1;
1471                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1472                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1473         }
1474 #endif
1475         wdev_unlock(dev->ieee80211_ptr);
1476
1477  out:
1478         cfg80211_unlock_rdev(rdev);
1479         dev_put(dev);
1480
1481  unlock_rtnl:
1482         rtnl_unlock();
1483
1484         return err;
1485 }
1486
1487 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1488 {
1489         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1490                     struct beacon_parameters *info);
1491         struct cfg80211_registered_device *rdev;
1492         int err;
1493         struct net_device *dev;
1494         struct beacon_parameters params;
1495         int haveinfo = 0;
1496
1497         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1498                 return -EINVAL;
1499
1500         rtnl_lock();
1501
1502         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1503         if (err)
1504                 goto unlock_rtnl;
1505
1506         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1507                 err = -EOPNOTSUPP;
1508                 goto out;
1509         }
1510
1511         switch (info->genlhdr->cmd) {
1512         case NL80211_CMD_NEW_BEACON:
1513                 /* these are required for NEW_BEACON */
1514                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1515                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1516                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1517                         err = -EINVAL;
1518                         goto out;
1519                 }
1520
1521                 call = rdev->ops->add_beacon;
1522                 break;
1523         case NL80211_CMD_SET_BEACON:
1524                 call = rdev->ops->set_beacon;
1525                 break;
1526         default:
1527                 WARN_ON(1);
1528                 err = -EOPNOTSUPP;
1529                 goto out;
1530         }
1531
1532         if (!call) {
1533                 err = -EOPNOTSUPP;
1534                 goto out;
1535         }
1536
1537         memset(&params, 0, sizeof(params));
1538
1539         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1540                 params.interval =
1541                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1542                 haveinfo = 1;
1543         }
1544
1545         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1546                 params.dtim_period =
1547                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1548                 haveinfo = 1;
1549         }
1550
1551         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1552                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1553                 params.head_len =
1554                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1555                 haveinfo = 1;
1556         }
1557
1558         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1559                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1560                 params.tail_len =
1561                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1562                 haveinfo = 1;
1563         }
1564
1565         if (!haveinfo) {
1566                 err = -EINVAL;
1567                 goto out;
1568         }
1569
1570         err = call(&rdev->wiphy, dev, &params);
1571
1572  out:
1573         cfg80211_unlock_rdev(rdev);
1574         dev_put(dev);
1575  unlock_rtnl:
1576         rtnl_unlock();
1577
1578         return err;
1579 }
1580
1581 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1582 {
1583         struct cfg80211_registered_device *rdev;
1584         int err;
1585         struct net_device *dev;
1586
1587         rtnl_lock();
1588
1589         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1590         if (err)
1591                 goto unlock_rtnl;
1592
1593         if (!rdev->ops->del_beacon) {
1594                 err = -EOPNOTSUPP;
1595                 goto out;
1596         }
1597
1598         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1599                 err = -EOPNOTSUPP;
1600                 goto out;
1601         }
1602         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1603
1604  out:
1605         cfg80211_unlock_rdev(rdev);
1606         dev_put(dev);
1607  unlock_rtnl:
1608         rtnl_unlock();
1609
1610         return err;
1611 }
1612
1613 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1614         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1615         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1616         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1617         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1618 };
1619
1620 static int parse_station_flags(struct genl_info *info,
1621                                struct station_parameters *params)
1622 {
1623         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1624         struct nlattr *nla;
1625         int flag;
1626
1627         /*
1628          * Try parsing the new attribute first so userspace
1629          * can specify both for older kernels.
1630          */
1631         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1632         if (nla) {
1633                 struct nl80211_sta_flag_update *sta_flags;
1634
1635                 sta_flags = nla_data(nla);
1636                 params->sta_flags_mask = sta_flags->mask;
1637                 params->sta_flags_set = sta_flags->set;
1638                 if ((params->sta_flags_mask |
1639                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1640                         return -EINVAL;
1641                 return 0;
1642         }
1643
1644         /* if present, parse the old attribute */
1645
1646         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1647         if (!nla)
1648                 return 0;
1649
1650         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1651                              nla, sta_flags_policy))
1652                 return -EINVAL;
1653
1654         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1655         params->sta_flags_mask &= ~1;
1656
1657         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1658                 if (flags[flag])
1659                         params->sta_flags_set |= (1<<flag);
1660
1661         return 0;
1662 }
1663
1664 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1665                                 int flags, struct net_device *dev,
1666                                 const u8 *mac_addr, struct station_info *sinfo)
1667 {
1668         void *hdr;
1669         struct nlattr *sinfoattr, *txrate;
1670         u16 bitrate;
1671
1672         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1673         if (!hdr)
1674                 return -1;
1675
1676         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1677         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1678
1679         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1680
1681         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1682         if (!sinfoattr)
1683                 goto nla_put_failure;
1684         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1685                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1686                             sinfo->inactive_time);
1687         if (sinfo->filled & STATION_INFO_RX_BYTES)
1688                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1689                             sinfo->rx_bytes);
1690         if (sinfo->filled & STATION_INFO_TX_BYTES)
1691                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1692                             sinfo->tx_bytes);
1693         if (sinfo->filled & STATION_INFO_LLID)
1694                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1695                             sinfo->llid);
1696         if (sinfo->filled & STATION_INFO_PLID)
1697                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1698                             sinfo->plid);
1699         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1700                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1701                             sinfo->plink_state);
1702         if (sinfo->filled & STATION_INFO_SIGNAL)
1703                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1704                            sinfo->signal);
1705         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1706                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1707                 if (!txrate)
1708                         goto nla_put_failure;
1709
1710                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1711                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1712                 if (bitrate > 0)
1713                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1714
1715                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1716                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1717                                     sinfo->txrate.mcs);
1718                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1719                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1720                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1721                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1722
1723                 nla_nest_end(msg, txrate);
1724         }
1725         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1726                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1727                             sinfo->rx_packets);
1728         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1729                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1730                             sinfo->tx_packets);
1731         nla_nest_end(msg, sinfoattr);
1732
1733         return genlmsg_end(msg, hdr);
1734
1735  nla_put_failure:
1736         genlmsg_cancel(msg, hdr);
1737         return -EMSGSIZE;
1738 }
1739
1740 static int nl80211_dump_station(struct sk_buff *skb,
1741                                 struct netlink_callback *cb)
1742 {
1743         struct station_info sinfo;
1744         struct cfg80211_registered_device *dev;
1745         struct net_device *netdev;
1746         u8 mac_addr[ETH_ALEN];
1747         int ifidx = cb->args[0];
1748         int sta_idx = cb->args[1];
1749         int err;
1750
1751         if (!ifidx)
1752                 ifidx = nl80211_get_ifidx(cb);
1753         if (ifidx < 0)
1754                 return ifidx;
1755
1756         rtnl_lock();
1757
1758         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1759         if (!netdev) {
1760                 err = -ENODEV;
1761                 goto out_rtnl;
1762         }
1763
1764         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1765         if (IS_ERR(dev)) {
1766                 err = PTR_ERR(dev);
1767                 goto out_rtnl;
1768         }
1769
1770         if (!dev->ops->dump_station) {
1771                 err = -EOPNOTSUPP;
1772                 goto out_err;
1773         }
1774
1775         while (1) {
1776                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1777                                              mac_addr, &sinfo);
1778                 if (err == -ENOENT)
1779                         break;
1780                 if (err)
1781                         goto out_err;
1782
1783                 if (nl80211_send_station(skb,
1784                                 NETLINK_CB(cb->skb).pid,
1785                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1786                                 netdev, mac_addr,
1787                                 &sinfo) < 0)
1788                         goto out;
1789
1790                 sta_idx++;
1791         }
1792
1793
1794  out:
1795         cb->args[1] = sta_idx;
1796         err = skb->len;
1797  out_err:
1798         cfg80211_unlock_rdev(dev);
1799  out_rtnl:
1800         rtnl_unlock();
1801
1802         return err;
1803 }
1804
1805 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1806 {
1807         struct cfg80211_registered_device *rdev;
1808         int err;
1809         struct net_device *dev;
1810         struct station_info sinfo;
1811         struct sk_buff *msg;
1812         u8 *mac_addr = NULL;
1813
1814         memset(&sinfo, 0, sizeof(sinfo));
1815
1816         if (!info->attrs[NL80211_ATTR_MAC])
1817                 return -EINVAL;
1818
1819         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1820
1821         rtnl_lock();
1822
1823         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1824         if (err)
1825                 goto out_rtnl;
1826
1827         if (!rdev->ops->get_station) {
1828                 err = -EOPNOTSUPP;
1829                 goto out;
1830         }
1831
1832         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1833         if (err)
1834                 goto out;
1835
1836         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1837         if (!msg)
1838                 goto out;
1839
1840         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1841                                  dev, mac_addr, &sinfo) < 0)
1842                 goto out_free;
1843
1844         err = genlmsg_reply(msg, info);
1845         goto out;
1846
1847  out_free:
1848         nlmsg_free(msg);
1849  out:
1850         cfg80211_unlock_rdev(rdev);
1851         dev_put(dev);
1852  out_rtnl:
1853         rtnl_unlock();
1854
1855         return err;
1856 }
1857
1858 /*
1859  * Get vlan interface making sure it is running and on the right wiphy.
1860  */
1861 static int get_vlan(struct genl_info *info,
1862                     struct cfg80211_registered_device *rdev,
1863                     struct net_device **vlan)
1864 {
1865         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1866         *vlan = NULL;
1867
1868         if (vlanattr) {
1869                 *vlan = dev_get_by_index(genl_info_net(info),
1870                                          nla_get_u32(vlanattr));
1871                 if (!*vlan)
1872                         return -ENODEV;
1873                 if (!(*vlan)->ieee80211_ptr)
1874                         return -EINVAL;
1875                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1876                         return -EINVAL;
1877                 if (!netif_running(*vlan))
1878                         return -ENETDOWN;
1879         }
1880         return 0;
1881 }
1882
1883 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1884 {
1885         struct cfg80211_registered_device *rdev;
1886         int err;
1887         struct net_device *dev;
1888         struct station_parameters params;
1889         u8 *mac_addr = NULL;
1890
1891         memset(&params, 0, sizeof(params));
1892
1893         params.listen_interval = -1;
1894
1895         if (info->attrs[NL80211_ATTR_STA_AID])
1896                 return -EINVAL;
1897
1898         if (!info->attrs[NL80211_ATTR_MAC])
1899                 return -EINVAL;
1900
1901         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1902
1903         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1904                 params.supported_rates =
1905                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1906                 params.supported_rates_len =
1907                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1908         }
1909
1910         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1911                 params.listen_interval =
1912                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1913
1914         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1915                 params.ht_capa =
1916                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1917
1918         if (parse_station_flags(info, &params))
1919                 return -EINVAL;
1920
1921         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1922                 params.plink_action =
1923                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1924
1925         rtnl_lock();
1926
1927         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1928         if (err)
1929                 goto out_rtnl;
1930
1931         err = get_vlan(info, rdev, &params.vlan);
1932         if (err)
1933                 goto out;
1934
1935         /* validate settings */
1936         err = 0;
1937
1938         switch (dev->ieee80211_ptr->iftype) {
1939         case NL80211_IFTYPE_AP:
1940         case NL80211_IFTYPE_AP_VLAN:
1941                 /* disallow mesh-specific things */
1942                 if (params.plink_action)
1943                         err = -EINVAL;
1944                 break;
1945         case NL80211_IFTYPE_STATION:
1946                 /* disallow everything but AUTHORIZED flag */
1947                 if (params.plink_action)
1948                         err = -EINVAL;
1949                 if (params.vlan)
1950                         err = -EINVAL;
1951                 if (params.supported_rates)
1952                         err = -EINVAL;
1953                 if (params.ht_capa)
1954                         err = -EINVAL;
1955                 if (params.listen_interval >= 0)
1956                         err = -EINVAL;
1957                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1958                         err = -EINVAL;
1959                 break;
1960         case NL80211_IFTYPE_MESH_POINT:
1961                 /* disallow things mesh doesn't support */
1962                 if (params.vlan)
1963                         err = -EINVAL;
1964                 if (params.ht_capa)
1965                         err = -EINVAL;
1966                 if (params.listen_interval >= 0)
1967                         err = -EINVAL;
1968                 if (params.supported_rates)
1969                         err = -EINVAL;
1970                 if (params.sta_flags_mask)
1971                         err = -EINVAL;
1972                 break;
1973         default:
1974                 err = -EINVAL;
1975         }
1976
1977         if (err)
1978                 goto out;
1979
1980         if (!rdev->ops->change_station) {
1981                 err = -EOPNOTSUPP;
1982                 goto out;
1983         }
1984
1985         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1986
1987  out:
1988         if (params.vlan)
1989                 dev_put(params.vlan);
1990         cfg80211_unlock_rdev(rdev);
1991         dev_put(dev);
1992  out_rtnl:
1993         rtnl_unlock();
1994
1995         return err;
1996 }
1997
1998 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1999 {
2000         struct cfg80211_registered_device *rdev;
2001         int err;
2002         struct net_device *dev;
2003         struct station_parameters params;
2004         u8 *mac_addr = NULL;
2005
2006         memset(&params, 0, sizeof(params));
2007
2008         if (!info->attrs[NL80211_ATTR_MAC])
2009                 return -EINVAL;
2010
2011         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2012                 return -EINVAL;
2013
2014         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2015                 return -EINVAL;
2016
2017         if (!info->attrs[NL80211_ATTR_STA_AID])
2018                 return -EINVAL;
2019
2020         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2021         params.supported_rates =
2022                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2023         params.supported_rates_len =
2024                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2025         params.listen_interval =
2026                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2027
2028         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2029         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2030                 return -EINVAL;
2031
2032         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2033                 params.ht_capa =
2034                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2035
2036         if (parse_station_flags(info, &params))
2037                 return -EINVAL;
2038
2039         rtnl_lock();
2040
2041         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2042         if (err)
2043                 goto out_rtnl;
2044
2045         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2046             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2047                 err = -EINVAL;
2048                 goto out;
2049         }
2050
2051         err = get_vlan(info, rdev, &params.vlan);
2052         if (err)
2053                 goto out;
2054
2055         /* validate settings */
2056         err = 0;
2057
2058         if (!rdev->ops->add_station) {
2059                 err = -EOPNOTSUPP;
2060                 goto out;
2061         }
2062
2063         if (!netif_running(dev)) {
2064                 err = -ENETDOWN;
2065                 goto out;
2066         }
2067
2068         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2069
2070  out:
2071         if (params.vlan)
2072                 dev_put(params.vlan);
2073         cfg80211_unlock_rdev(rdev);
2074         dev_put(dev);
2075  out_rtnl:
2076         rtnl_unlock();
2077
2078         return err;
2079 }
2080
2081 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2082 {
2083         struct cfg80211_registered_device *rdev;
2084         int err;
2085         struct net_device *dev;
2086         u8 *mac_addr = NULL;
2087
2088         if (info->attrs[NL80211_ATTR_MAC])
2089                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2090
2091         rtnl_lock();
2092
2093         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2094         if (err)
2095                 goto out_rtnl;
2096
2097         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2098             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2099                 err = -EINVAL;
2100                 goto out;
2101         }
2102
2103         if (!rdev->ops->del_station) {
2104                 err = -EOPNOTSUPP;
2105                 goto out;
2106         }
2107
2108         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2109
2110  out:
2111         cfg80211_unlock_rdev(rdev);
2112         dev_put(dev);
2113  out_rtnl:
2114         rtnl_unlock();
2115
2116         return err;
2117 }
2118
2119 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2120                                 int flags, struct net_device *dev,
2121                                 u8 *dst, u8 *next_hop,
2122                                 struct mpath_info *pinfo)
2123 {
2124         void *hdr;
2125         struct nlattr *pinfoattr;
2126
2127         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2128         if (!hdr)
2129                 return -1;
2130
2131         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2132         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2133         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2134
2135         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2136
2137         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2138         if (!pinfoattr)
2139                 goto nla_put_failure;
2140         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2141                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2142                             pinfo->frame_qlen);
2143         if (pinfo->filled & MPATH_INFO_SN)
2144                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2145                             pinfo->sn);
2146         if (pinfo->filled & MPATH_INFO_METRIC)
2147                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2148                             pinfo->metric);
2149         if (pinfo->filled & MPATH_INFO_EXPTIME)
2150                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2151                             pinfo->exptime);
2152         if (pinfo->filled & MPATH_INFO_FLAGS)
2153                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2154                             pinfo->flags);
2155         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2156                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2157                             pinfo->discovery_timeout);
2158         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2159                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2160                             pinfo->discovery_retries);
2161
2162         nla_nest_end(msg, pinfoattr);
2163
2164         return genlmsg_end(msg, hdr);
2165
2166  nla_put_failure:
2167         genlmsg_cancel(msg, hdr);
2168         return -EMSGSIZE;
2169 }
2170
2171 static int nl80211_dump_mpath(struct sk_buff *skb,
2172                               struct netlink_callback *cb)
2173 {
2174         struct mpath_info pinfo;
2175         struct cfg80211_registered_device *dev;
2176         struct net_device *netdev;
2177         u8 dst[ETH_ALEN];
2178         u8 next_hop[ETH_ALEN];
2179         int ifidx = cb->args[0];
2180         int path_idx = cb->args[1];
2181         int err;
2182
2183         if (!ifidx)
2184                 ifidx = nl80211_get_ifidx(cb);
2185         if (ifidx < 0)
2186                 return ifidx;
2187
2188         rtnl_lock();
2189
2190         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2191         if (!netdev) {
2192                 err = -ENODEV;
2193                 goto out_rtnl;
2194         }
2195
2196         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2197         if (IS_ERR(dev)) {
2198                 err = PTR_ERR(dev);
2199                 goto out_rtnl;
2200         }
2201
2202         if (!dev->ops->dump_mpath) {
2203                 err = -EOPNOTSUPP;
2204                 goto out_err;
2205         }
2206
2207         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2208                 err = -EOPNOTSUPP;
2209                 goto out_err;
2210         }
2211
2212         while (1) {
2213                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2214                                            dst, next_hop, &pinfo);
2215                 if (err == -ENOENT)
2216                         break;
2217                 if (err)
2218                         goto out_err;
2219
2220                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2221                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2222                                        netdev, dst, next_hop,
2223                                        &pinfo) < 0)
2224                         goto out;
2225
2226                 path_idx++;
2227         }
2228
2229
2230  out:
2231         cb->args[1] = path_idx;
2232         err = skb->len;
2233  out_err:
2234         cfg80211_unlock_rdev(dev);
2235  out_rtnl:
2236         rtnl_unlock();
2237
2238         return err;
2239 }
2240
2241 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2242 {
2243         struct cfg80211_registered_device *rdev;
2244         int err;
2245         struct net_device *dev;
2246         struct mpath_info pinfo;
2247         struct sk_buff *msg;
2248         u8 *dst = NULL;
2249         u8 next_hop[ETH_ALEN];
2250
2251         memset(&pinfo, 0, sizeof(pinfo));
2252
2253         if (!info->attrs[NL80211_ATTR_MAC])
2254                 return -EINVAL;
2255
2256         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2257
2258         rtnl_lock();
2259
2260         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2261         if (err)
2262                 goto out_rtnl;
2263
2264         if (!rdev->ops->get_mpath) {
2265                 err = -EOPNOTSUPP;
2266                 goto out;
2267         }
2268
2269         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2270                 err = -EOPNOTSUPP;
2271                 goto out;
2272         }
2273
2274         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2275         if (err)
2276                 goto out;
2277
2278         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2279         if (!msg)
2280                 goto out;
2281
2282         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2283                                  dev, dst, next_hop, &pinfo) < 0)
2284                 goto out_free;
2285
2286         err = genlmsg_reply(msg, info);
2287         goto out;
2288
2289  out_free:
2290         nlmsg_free(msg);
2291  out:
2292         cfg80211_unlock_rdev(rdev);
2293         dev_put(dev);
2294  out_rtnl:
2295         rtnl_unlock();
2296
2297         return err;
2298 }
2299
2300 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2301 {
2302         struct cfg80211_registered_device *rdev;
2303         int err;
2304         struct net_device *dev;
2305         u8 *dst = NULL;
2306         u8 *next_hop = NULL;
2307
2308         if (!info->attrs[NL80211_ATTR_MAC])
2309                 return -EINVAL;
2310
2311         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2312                 return -EINVAL;
2313
2314         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2315         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2316
2317         rtnl_lock();
2318
2319         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2320         if (err)
2321                 goto out_rtnl;
2322
2323         if (!rdev->ops->change_mpath) {
2324                 err = -EOPNOTSUPP;
2325                 goto out;
2326         }
2327
2328         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2329                 err = -EOPNOTSUPP;
2330                 goto out;
2331         }
2332
2333         if (!netif_running(dev)) {
2334                 err = -ENETDOWN;
2335                 goto out;
2336         }
2337
2338         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2339
2340  out:
2341         cfg80211_unlock_rdev(rdev);
2342         dev_put(dev);
2343  out_rtnl:
2344         rtnl_unlock();
2345
2346         return err;
2347 }
2348 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2349 {
2350         struct cfg80211_registered_device *rdev;
2351         int err;
2352         struct net_device *dev;
2353         u8 *dst = NULL;
2354         u8 *next_hop = NULL;
2355
2356         if (!info->attrs[NL80211_ATTR_MAC])
2357                 return -EINVAL;
2358
2359         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2360                 return -EINVAL;
2361
2362         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2363         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2364
2365         rtnl_lock();
2366
2367         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2368         if (err)
2369                 goto out_rtnl;
2370
2371         if (!rdev->ops->add_mpath) {
2372                 err = -EOPNOTSUPP;
2373                 goto out;
2374         }
2375
2376         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2377                 err = -EOPNOTSUPP;
2378                 goto out;
2379         }
2380
2381         if (!netif_running(dev)) {
2382                 err = -ENETDOWN;
2383                 goto out;
2384         }
2385
2386         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2387
2388  out:
2389         cfg80211_unlock_rdev(rdev);
2390         dev_put(dev);
2391  out_rtnl:
2392         rtnl_unlock();
2393
2394         return err;
2395 }
2396
2397 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2398 {
2399         struct cfg80211_registered_device *rdev;
2400         int err;
2401         struct net_device *dev;
2402         u8 *dst = NULL;
2403
2404         if (info->attrs[NL80211_ATTR_MAC])
2405                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2406
2407         rtnl_lock();
2408
2409         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2410         if (err)
2411                 goto out_rtnl;
2412
2413         if (!rdev->ops->del_mpath) {
2414                 err = -EOPNOTSUPP;
2415                 goto out;
2416         }
2417
2418         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2419
2420  out:
2421         cfg80211_unlock_rdev(rdev);
2422         dev_put(dev);
2423  out_rtnl:
2424         rtnl_unlock();
2425
2426         return err;
2427 }
2428
2429 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2430 {
2431         struct cfg80211_registered_device *rdev;
2432         int err;
2433         struct net_device *dev;
2434         struct bss_parameters params;
2435
2436         memset(&params, 0, sizeof(params));
2437         /* default to not changing parameters */
2438         params.use_cts_prot = -1;
2439         params.use_short_preamble = -1;
2440         params.use_short_slot_time = -1;
2441
2442         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2443                 params.use_cts_prot =
2444                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2445         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2446                 params.use_short_preamble =
2447                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2448         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2449                 params.use_short_slot_time =
2450                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2451         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2452                 params.basic_rates =
2453                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2454                 params.basic_rates_len =
2455                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2456         }
2457
2458         rtnl_lock();
2459
2460         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2461         if (err)
2462                 goto out_rtnl;
2463
2464         if (!rdev->ops->change_bss) {
2465                 err = -EOPNOTSUPP;
2466                 goto out;
2467         }
2468
2469         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2470                 err = -EOPNOTSUPP;
2471                 goto out;
2472         }
2473
2474         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2475
2476  out:
2477         cfg80211_unlock_rdev(rdev);
2478         dev_put(dev);
2479  out_rtnl:
2480         rtnl_unlock();
2481
2482         return err;
2483 }
2484
2485 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2486         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2487         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2488         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2489         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2490         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2491         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2492 };
2493
2494 static int parse_reg_rule(struct nlattr *tb[],
2495         struct ieee80211_reg_rule *reg_rule)
2496 {
2497         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2498         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2499
2500         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2501                 return -EINVAL;
2502         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2503                 return -EINVAL;
2504         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2505                 return -EINVAL;
2506         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2507                 return -EINVAL;
2508         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2509                 return -EINVAL;
2510
2511         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2512
2513         freq_range->start_freq_khz =
2514                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2515         freq_range->end_freq_khz =
2516                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2517         freq_range->max_bandwidth_khz =
2518                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2519
2520         power_rule->max_eirp =
2521                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2522
2523         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2524                 power_rule->max_antenna_gain =
2525                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2526
2527         return 0;
2528 }
2529
2530 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2531 {
2532         int r;
2533         char *data = NULL;
2534
2535         /*
2536          * You should only get this when cfg80211 hasn't yet initialized
2537          * completely when built-in to the kernel right between the time
2538          * window between nl80211_init() and regulatory_init(), if that is
2539          * even possible.
2540          */
2541         mutex_lock(&cfg80211_mutex);
2542         if (unlikely(!cfg80211_regdomain)) {
2543                 mutex_unlock(&cfg80211_mutex);
2544                 return -EINPROGRESS;
2545         }
2546         mutex_unlock(&cfg80211_mutex);
2547
2548         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2549                 return -EINVAL;
2550
2551         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2552
2553         r = regulatory_hint_user(data);
2554
2555         return r;
2556 }
2557
2558 static int nl80211_get_mesh_params(struct sk_buff *skb,
2559         struct genl_info *info)
2560 {
2561         struct cfg80211_registered_device *rdev;
2562         struct mesh_config cur_params;
2563         int err;
2564         struct net_device *dev;
2565         void *hdr;
2566         struct nlattr *pinfoattr;
2567         struct sk_buff *msg;
2568
2569         rtnl_lock();
2570
2571         /* Look up our device */
2572         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2573         if (err)
2574                 goto out_rtnl;
2575
2576         if (!rdev->ops->get_mesh_params) {
2577                 err = -EOPNOTSUPP;
2578                 goto out;
2579         }
2580
2581         /* Get the mesh params */
2582         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2583         if (err)
2584                 goto out;
2585
2586         /* Draw up a netlink message to send back */
2587         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2588         if (!msg) {
2589                 err = -ENOBUFS;
2590                 goto out;
2591         }
2592         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2593                              NL80211_CMD_GET_MESH_PARAMS);
2594         if (!hdr)
2595                 goto nla_put_failure;
2596         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2597         if (!pinfoattr)
2598                 goto nla_put_failure;
2599         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2600         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2601                         cur_params.dot11MeshRetryTimeout);
2602         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2603                         cur_params.dot11MeshConfirmTimeout);
2604         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2605                         cur_params.dot11MeshHoldingTimeout);
2606         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2607                         cur_params.dot11MeshMaxPeerLinks);
2608         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2609                         cur_params.dot11MeshMaxRetries);
2610         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2611                         cur_params.dot11MeshTTL);
2612         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2613                         cur_params.auto_open_plinks);
2614         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2615                         cur_params.dot11MeshHWMPmaxPREQretries);
2616         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2617                         cur_params.path_refresh_time);
2618         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2619                         cur_params.min_discovery_timeout);
2620         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2621                         cur_params.dot11MeshHWMPactivePathTimeout);
2622         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2623                         cur_params.dot11MeshHWMPpreqMinInterval);
2624         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2625                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2626         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2627                         cur_params.dot11MeshHWMPRootMode);
2628         nla_nest_end(msg, pinfoattr);
2629         genlmsg_end(msg, hdr);
2630         err = genlmsg_reply(msg, info);
2631         goto out;
2632
2633  nla_put_failure:
2634         genlmsg_cancel(msg, hdr);
2635         err = -EMSGSIZE;
2636  out:
2637         /* Cleanup */
2638         cfg80211_unlock_rdev(rdev);
2639         dev_put(dev);
2640  out_rtnl:
2641         rtnl_unlock();
2642
2643         return err;
2644 }
2645
2646 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2647 do {\
2648         if (table[attr_num]) {\
2649                 cfg.param = nla_fn(table[attr_num]); \
2650                 mask |= (1 << (attr_num - 1)); \
2651         } \
2652 } while (0);\
2653
2654 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2655         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2656         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2657         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2658         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2659         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2660         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2661         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2662
2663         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2664         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2665         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2666         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2667         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2668         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2669 };
2670
2671 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2672 {
2673         int err;
2674         u32 mask;
2675         struct cfg80211_registered_device *rdev;
2676         struct net_device *dev;
2677         struct mesh_config cfg;
2678         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2679         struct nlattr *parent_attr;
2680
2681         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2682         if (!parent_attr)
2683                 return -EINVAL;
2684         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2685                         parent_attr, nl80211_meshconf_params_policy))
2686                 return -EINVAL;
2687
2688         rtnl_lock();
2689
2690         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2691         if (err)
2692                 goto out_rtnl;
2693
2694         if (!rdev->ops->set_mesh_params) {
2695                 err = -EOPNOTSUPP;
2696                 goto out;
2697         }
2698
2699         /* This makes sure that there aren't more than 32 mesh config
2700          * parameters (otherwise our bitfield scheme would not work.) */
2701         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2702
2703         /* Fill in the params struct */
2704         mask = 0;
2705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2706                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2707         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2708                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2710                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2711         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2712                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2714                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2716                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2717         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2718                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2719         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2720                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2721                         nla_get_u8);
2722         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2723                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2725                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2726                         nla_get_u16);
2727         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2728                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2729                         nla_get_u32);
2730         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2731                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2732                         nla_get_u16);
2733         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2734                         dot11MeshHWMPnetDiameterTraversalTime,
2735                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2736                         nla_get_u16);
2737         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2738                         dot11MeshHWMPRootMode, mask,
2739                         NL80211_MESHCONF_HWMP_ROOTMODE,
2740                         nla_get_u8);
2741
2742         /* Apply changes */
2743         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2744
2745  out:
2746         /* cleanup */
2747         cfg80211_unlock_rdev(rdev);
2748         dev_put(dev);
2749  out_rtnl:
2750         rtnl_unlock();
2751
2752         return err;
2753 }
2754
2755 #undef FILL_IN_MESH_PARAM_IF_SET
2756
2757 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2758 {
2759         struct sk_buff *msg;
2760         void *hdr = NULL;
2761         struct nlattr *nl_reg_rules;
2762         unsigned int i;
2763         int err = -EINVAL;
2764
2765         mutex_lock(&cfg80211_mutex);
2766
2767         if (!cfg80211_regdomain)
2768                 goto out;
2769
2770         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2771         if (!msg) {
2772                 err = -ENOBUFS;
2773                 goto out;
2774         }
2775
2776         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2777                              NL80211_CMD_GET_REG);
2778         if (!hdr)
2779                 goto nla_put_failure;
2780
2781         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2782                 cfg80211_regdomain->alpha2);
2783
2784         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2785         if (!nl_reg_rules)
2786                 goto nla_put_failure;
2787
2788         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2789                 struct nlattr *nl_reg_rule;
2790                 const struct ieee80211_reg_rule *reg_rule;
2791                 const struct ieee80211_freq_range *freq_range;
2792                 const struct ieee80211_power_rule *power_rule;
2793
2794                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2795                 freq_range = &reg_rule->freq_range;
2796                 power_rule = &reg_rule->power_rule;
2797
2798                 nl_reg_rule = nla_nest_start(msg, i);
2799                 if (!nl_reg_rule)
2800                         goto nla_put_failure;
2801
2802                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2803                         reg_rule->flags);
2804                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2805                         freq_range->start_freq_khz);
2806                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2807                         freq_range->end_freq_khz);
2808                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2809                         freq_range->max_bandwidth_khz);
2810                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2811                         power_rule->max_antenna_gain);
2812                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2813                         power_rule->max_eirp);
2814
2815                 nla_nest_end(msg, nl_reg_rule);
2816         }
2817
2818         nla_nest_end(msg, nl_reg_rules);
2819
2820         genlmsg_end(msg, hdr);
2821         err = genlmsg_reply(msg, info);
2822         goto out;
2823
2824 nla_put_failure:
2825         genlmsg_cancel(msg, hdr);
2826         err = -EMSGSIZE;
2827 out:
2828         mutex_unlock(&cfg80211_mutex);
2829         return err;
2830 }
2831
2832 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2833 {
2834         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2835         struct nlattr *nl_reg_rule;
2836         char *alpha2 = NULL;
2837         int rem_reg_rules = 0, r = 0;
2838         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2839         struct ieee80211_regdomain *rd = NULL;
2840
2841         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2842                 return -EINVAL;
2843
2844         if (!info->attrs[NL80211_ATTR_REG_RULES])
2845                 return -EINVAL;
2846
2847         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2848
2849         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2850                         rem_reg_rules) {
2851                 num_rules++;
2852                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2853                         return -EINVAL;
2854         }
2855
2856         mutex_lock(&cfg80211_mutex);
2857
2858         if (!reg_is_valid_request(alpha2)) {
2859                 r = -EINVAL;
2860                 goto bad_reg;
2861         }
2862
2863         size_of_regd = sizeof(struct ieee80211_regdomain) +
2864                 (num_rules * sizeof(struct ieee80211_reg_rule));
2865
2866         rd = kzalloc(size_of_regd, GFP_KERNEL);
2867         if (!rd) {
2868                 r = -ENOMEM;
2869                 goto bad_reg;
2870         }
2871
2872         rd->n_reg_rules = num_rules;
2873         rd->alpha2[0] = alpha2[0];
2874         rd->alpha2[1] = alpha2[1];
2875
2876         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2877                         rem_reg_rules) {
2878                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2879                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2880                         reg_rule_policy);
2881                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2882                 if (r)
2883                         goto bad_reg;
2884
2885                 rule_idx++;
2886
2887                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2888                         r = -EINVAL;
2889                         goto bad_reg;
2890                 }
2891         }
2892
2893         BUG_ON(rule_idx != num_rules);
2894
2895         r = set_regdom(rd);
2896
2897         mutex_unlock(&cfg80211_mutex);
2898
2899         return r;
2900
2901  bad_reg:
2902         mutex_unlock(&cfg80211_mutex);
2903         kfree(rd);
2904         return r;
2905 }
2906
2907 static int validate_scan_freqs(struct nlattr *freqs)
2908 {
2909         struct nlattr *attr1, *attr2;
2910         int n_channels = 0, tmp1, tmp2;
2911
2912         nla_for_each_nested(attr1, freqs, tmp1) {
2913                 n_channels++;
2914                 /*
2915                  * Some hardware has a limited channel list for
2916                  * scanning, and it is pretty much nonsensical
2917                  * to scan for a channel twice, so disallow that
2918                  * and don't require drivers to check that the
2919                  * channel list they get isn't longer than what
2920                  * they can scan, as long as they can scan all
2921                  * the channels they registered at once.
2922                  */
2923                 nla_for_each_nested(attr2, freqs, tmp2)
2924                         if (attr1 != attr2 &&
2925                             nla_get_u32(attr1) == nla_get_u32(attr2))
2926                                 return 0;
2927         }
2928
2929         return n_channels;
2930 }
2931
2932 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2933 {
2934         struct cfg80211_registered_device *rdev;
2935         struct net_device *dev;
2936         struct cfg80211_scan_request *request;
2937         struct cfg80211_ssid *ssid;
2938         struct ieee80211_channel *channel;
2939         struct nlattr *attr;
2940         struct wiphy *wiphy;
2941         int err, tmp, n_ssids = 0, n_channels, i;
2942         enum ieee80211_band band;
2943         size_t ie_len;
2944
2945         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2946                 return -EINVAL;
2947
2948         rtnl_lock();
2949
2950         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2951         if (err)
2952                 goto out_rtnl;
2953
2954         wiphy = &rdev->wiphy;
2955
2956         if (!rdev->ops->scan) {
2957                 err = -EOPNOTSUPP;
2958                 goto out;
2959         }
2960
2961         if (!netif_running(dev)) {
2962                 err = -ENETDOWN;
2963                 goto out;
2964         }
2965
2966         if (rdev->scan_req) {
2967                 err = -EBUSY;
2968                 goto out;
2969         }
2970
2971         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2972                 n_channels = validate_scan_freqs(
2973                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2974                 if (!n_channels) {
2975                         err = -EINVAL;
2976                         goto out;
2977                 }
2978         } else {
2979                 n_channels = 0;
2980
2981                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2982                         if (wiphy->bands[band])
2983                                 n_channels += wiphy->bands[band]->n_channels;
2984         }
2985
2986         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2987                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2988                         n_ssids++;
2989
2990         if (n_ssids > wiphy->max_scan_ssids) {
2991                 err = -EINVAL;
2992                 goto out;
2993         }
2994
2995         if (info->attrs[NL80211_ATTR_IE])
2996                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2997         else
2998                 ie_len = 0;
2999
3000         if (ie_len > wiphy->max_scan_ie_len) {
3001                 err = -EINVAL;
3002                 goto out;
3003         }
3004
3005         request = kzalloc(sizeof(*request)
3006                         + sizeof(*ssid) * n_ssids
3007                         + sizeof(channel) * n_channels
3008                         + ie_len, GFP_KERNEL);
3009         if (!request) {
3010                 err = -ENOMEM;
3011                 goto out;
3012         }
3013
3014         if (n_ssids)
3015                 request->ssids = (void *)&request->channels[n_channels];
3016         request->n_ssids = n_ssids;
3017         if (ie_len) {
3018                 if (request->ssids)
3019                         request->ie = (void *)(request->ssids + n_ssids);
3020                 else
3021                         request->ie = (void *)(request->channels + n_channels);
3022         }
3023
3024         i = 0;
3025         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3026                 /* user specified, bail out if channel not found */
3027                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3028                         struct ieee80211_channel *chan;
3029
3030                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3031
3032                         if (!chan) {
3033                                 err = -EINVAL;
3034                                 goto out_free;
3035                         }
3036
3037                         /* ignore disabled channels */
3038                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3039                                 continue;
3040
3041                         request->channels[i] = chan;
3042                         i++;
3043                 }
3044         } else {
3045                 /* all channels */
3046                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3047                         int j;
3048                         if (!wiphy->bands[band])
3049                                 continue;
3050                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3051                                 struct ieee80211_channel *chan;
3052
3053                                 chan = &wiphy->bands[band]->channels[j];
3054
3055                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3056                                         continue;
3057
3058                                 request->channels[i] = chan;
3059                                 i++;
3060                         }
3061                 }
3062         }
3063
3064         if (!i) {
3065                 err = -EINVAL;
3066                 goto out_free;
3067         }
3068
3069         request->n_channels = i;
3070
3071         i = 0;
3072         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3073                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3074                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3075                                 err = -EINVAL;
3076                                 goto out_free;
3077                         }
3078                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3079                         request->ssids[i].ssid_len = nla_len(attr);
3080                         i++;
3081                 }
3082         }
3083
3084         if (info->attrs[NL80211_ATTR_IE]) {
3085                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3086                 memcpy((void *)request->ie,
3087                        nla_data(info->attrs[NL80211_ATTR_IE]),
3088                        request->ie_len);
3089         }
3090
3091         request->dev = dev;
3092         request->wiphy = &rdev->wiphy;
3093
3094         rdev->scan_req = request;
3095         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3096
3097         if (!err) {
3098                 nl80211_send_scan_start(rdev, dev);
3099                 dev_hold(dev);
3100         }
3101
3102  out_free:
3103         if (err) {
3104                 rdev->scan_req = NULL;
3105                 kfree(request);
3106         }
3107  out:
3108         cfg80211_unlock_rdev(rdev);
3109         dev_put(dev);
3110  out_rtnl:
3111         rtnl_unlock();
3112
3113         return err;
3114 }
3115
3116 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3117                             struct cfg80211_registered_device *rdev,
3118                             struct wireless_dev *wdev,
3119                             struct cfg80211_internal_bss *intbss)
3120 {
3121         struct cfg80211_bss *res = &intbss->pub;
3122         void *hdr;
3123         struct nlattr *bss;
3124         int i;
3125
3126         ASSERT_WDEV_LOCK(wdev);
3127
3128         hdr = nl80211hdr_put(msg, pid, seq, flags,
3129                              NL80211_CMD_NEW_SCAN_RESULTS);
3130         if (!hdr)
3131                 return -1;
3132
3133         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3134         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3135
3136         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3137         if (!bss)
3138                 goto nla_put_failure;
3139         if (!is_zero_ether_addr(res->bssid))
3140                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3141         if (res->information_elements && res->len_information_elements)
3142                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3143                         res->len_information_elements,
3144                         res->information_elements);
3145         if (res->beacon_ies && res->len_beacon_ies &&
3146             res->beacon_ies != res->information_elements)
3147                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3148                         res->len_beacon_ies, res->beacon_ies);
3149         if (res->tsf)
3150                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3151         if (res->beacon_interval)
3152                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3153         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3154         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3155         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3156                 jiffies_to_msecs(jiffies - intbss->ts));
3157
3158         switch (rdev->wiphy.signal_type) {
3159         case CFG80211_SIGNAL_TYPE_MBM:
3160                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3161                 break;
3162         case CFG80211_SIGNAL_TYPE_UNSPEC:
3163                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3164                 break;
3165         default:
3166                 break;
3167         }
3168
3169         switch (wdev->iftype) {
3170         case NL80211_IFTYPE_STATION:
3171                 if (intbss == wdev->current_bss)
3172                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3173                                     NL80211_BSS_STATUS_ASSOCIATED);
3174                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3175                         if (intbss != wdev->auth_bsses[i])
3176                                 continue;
3177                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3178                                     NL80211_BSS_STATUS_AUTHENTICATED);
3179                         break;
3180                 }
3181                 break;
3182         case NL80211_IFTYPE_ADHOC:
3183                 if (intbss == wdev->current_bss)
3184                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3185                                     NL80211_BSS_STATUS_IBSS_JOINED);
3186                 break;
3187         default:
3188                 break;
3189         }
3190
3191         nla_nest_end(msg, bss);
3192
3193         return genlmsg_end(msg, hdr);
3194
3195  nla_put_failure:
3196         genlmsg_cancel(msg, hdr);
3197         return -EMSGSIZE;
3198 }
3199
3200 static int nl80211_dump_scan(struct sk_buff *skb,
3201                              struct netlink_callback *cb)
3202 {
3203         struct cfg80211_registered_device *rdev;
3204         struct net_device *dev;
3205         struct cfg80211_internal_bss *scan;
3206         struct wireless_dev *wdev;
3207         int ifidx = cb->args[0];
3208         int start = cb->args[1], idx = 0;
3209         int err;
3210
3211         if (!ifidx)
3212                 ifidx = nl80211_get_ifidx(cb);
3213         if (ifidx < 0)
3214                 return ifidx;
3215         cb->args[0] = ifidx;
3216
3217         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3218         if (!dev)
3219                 return -ENODEV;
3220
3221         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3222         if (IS_ERR(rdev)) {
3223                 err = PTR_ERR(rdev);
3224                 goto out_put_netdev;
3225         }
3226
3227         wdev = dev->ieee80211_ptr;
3228
3229         wdev_lock(wdev);
3230         spin_lock_bh(&rdev->bss_lock);
3231         cfg80211_bss_expire(rdev);
3232
3233         list_for_each_entry(scan, &rdev->bss_list, list) {
3234                 if (++idx <= start)
3235                         continue;
3236                 if (nl80211_send_bss(skb,
3237                                 NETLINK_CB(cb->skb).pid,
3238                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3239                                 rdev, wdev, scan) < 0) {
3240                         idx--;
3241                         goto out;
3242                 }
3243         }
3244
3245  out:
3246         spin_unlock_bh(&rdev->bss_lock);
3247         wdev_unlock(wdev);
3248
3249         cb->args[1] = idx;
3250         err = skb->len;
3251         cfg80211_unlock_rdev(rdev);
3252  out_put_netdev:
3253         dev_put(dev);
3254
3255         return err;
3256 }
3257
3258 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3259                                 int flags, struct net_device *dev,
3260                                 struct survey_info *survey)
3261 {
3262         void *hdr;
3263         struct nlattr *infoattr;
3264
3265         /* Survey without a channel doesn't make sense */
3266         if (!survey->channel)
3267                 return -EINVAL;
3268
3269         hdr = nl80211hdr_put(msg, pid, seq, flags,
3270                              NL80211_CMD_NEW_SURVEY_RESULTS);
3271         if (!hdr)
3272                 return -ENOMEM;
3273
3274         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3275
3276         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3277         if (!infoattr)
3278                 goto nla_put_failure;
3279
3280         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3281                     survey->channel->center_freq);
3282         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3283                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3284                             survey->noise);
3285
3286         nla_nest_end(msg, infoattr);
3287
3288         return genlmsg_end(msg, hdr);
3289
3290  nla_put_failure:
3291         genlmsg_cancel(msg, hdr);
3292         return -EMSGSIZE;
3293 }
3294
3295 static int nl80211_dump_survey(struct sk_buff *skb,
3296                         struct netlink_callback *cb)
3297 {
3298         struct survey_info survey;
3299         struct cfg80211_registered_device *dev;
3300         struct net_device *netdev;
3301         int ifidx = cb->args[0];
3302         int survey_idx = cb->args[1];
3303         int res;
3304
3305         if (!ifidx)
3306                 ifidx = nl80211_get_ifidx(cb);
3307         if (ifidx < 0)
3308                 return ifidx;
3309         cb->args[0] = ifidx;
3310
3311         rtnl_lock();
3312
3313         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3314         if (!netdev) {
3315                 res = -ENODEV;
3316                 goto out_rtnl;
3317         }
3318
3319         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3320         if (IS_ERR(dev)) {
3321                 res = PTR_ERR(dev);
3322                 goto out_rtnl;
3323         }
3324
3325         if (!dev->ops->dump_survey) {
3326                 res = -EOPNOTSUPP;
3327                 goto out_err;
3328         }
3329
3330         while (1) {
3331                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3332                                             &survey);
3333                 if (res == -ENOENT)
3334                         break;
3335                 if (res)
3336                         goto out_err;
3337
3338                 if (nl80211_send_survey(skb,
3339                                 NETLINK_CB(cb->skb).pid,
3340                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3341                                 netdev,
3342                                 &survey) < 0)
3343                         goto out;
3344                 survey_idx++;
3345         }
3346
3347  out:
3348         cb->args[1] = survey_idx;
3349         res = skb->len;
3350  out_err:
3351         cfg80211_unlock_rdev(dev);
3352  out_rtnl:
3353         rtnl_unlock();
3354
3355         return res;
3356 }
3357
3358 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3359 {
3360         return auth_type <= NL80211_AUTHTYPE_MAX;
3361 }
3362
3363 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3364 {
3365         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3366                                   NL80211_WPA_VERSION_2));
3367 }
3368
3369 static bool nl80211_valid_akm_suite(u32 akm)
3370 {
3371         return akm == WLAN_AKM_SUITE_8021X ||
3372                 akm == WLAN_AKM_SUITE_PSK;
3373 }
3374
3375 static bool nl80211_valid_cipher_suite(u32 cipher)
3376 {
3377         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3378                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3379                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3380                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3381                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3382 }
3383
3384
3385 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3386 {
3387         struct cfg80211_registered_device *rdev;
3388         struct net_device *dev;
3389         struct ieee80211_channel *chan;
3390         const u8 *bssid, *ssid, *ie = NULL;
3391         int err, ssid_len, ie_len = 0;
3392         enum nl80211_auth_type auth_type;
3393         struct key_parse key;
3394
3395         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3396                 return -EINVAL;
3397
3398         if (!info->attrs[NL80211_ATTR_MAC])
3399                 return -EINVAL;
3400
3401         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3402                 return -EINVAL;
3403
3404         if (!info->attrs[NL80211_ATTR_SSID])
3405                 return -EINVAL;
3406
3407         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3408                 return -EINVAL;
3409
3410         err = nl80211_parse_key(info, &key);
3411         if (err)
3412                 return err;
3413
3414         if (key.idx >= 0) {
3415                 if (!key.p.key || !key.p.key_len)
3416                         return -EINVAL;
3417                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3418                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3419                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3420                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3421                         return -EINVAL;
3422                 if (key.idx > 4)
3423                         return -EINVAL;
3424         } else {
3425                 key.p.key_len = 0;
3426                 key.p.key = NULL;
3427         }
3428
3429         rtnl_lock();
3430
3431         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3432         if (err)
3433                 goto unlock_rtnl;
3434
3435         if (!rdev->ops->auth) {
3436                 err = -EOPNOTSUPP;
3437                 goto out;
3438         }
3439
3440         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3441                 err = -EOPNOTSUPP;
3442                 goto out;
3443         }
3444
3445         if (!netif_running(dev)) {
3446                 err = -ENETDOWN;
3447                 goto out;
3448         }
3449
3450         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3451         chan = ieee80211_get_channel(&rdev->wiphy,
3452                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3453         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3454                 err = -EINVAL;
3455                 goto out;
3456         }
3457
3458         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3459         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3460
3461         if (info->attrs[NL80211_ATTR_IE]) {
3462                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3463                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3464         }
3465
3466         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3467         if (!nl80211_valid_auth_type(auth_type)) {
3468                 err = -EINVAL;
3469                 goto out;
3470         }
3471
3472         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3473                                  ssid, ssid_len, ie, ie_len,
3474                                  key.p.key, key.p.key_len, key.idx);
3475
3476 out:
3477         cfg80211_unlock_rdev(rdev);
3478         dev_put(dev);
3479 unlock_rtnl:
3480         rtnl_unlock();
3481         return err;
3482 }
3483
3484 static int nl80211_crypto_settings(struct genl_info *info,
3485                                    struct cfg80211_crypto_settings *settings,
3486                                    int cipher_limit)
3487 {
3488         memset(settings, 0, sizeof(*settings));
3489
3490         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3491
3492         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3493                 void *data;
3494                 int len, i;
3495
3496                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3497                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3498                 settings->n_ciphers_pairwise = len / sizeof(u32);
3499
3500                 if (len % sizeof(u32))
3501                         return -EINVAL;
3502
3503                 if (settings->n_ciphers_pairwise > cipher_limit)
3504                         return -EINVAL;
3505
3506                 memcpy(settings->ciphers_pairwise, data, len);
3507
3508                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3509                         if (!nl80211_valid_cipher_suite(
3510                                         settings->ciphers_pairwise[i]))
3511                                 return -EINVAL;
3512         }
3513
3514         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3515                 settings->cipher_group =
3516                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3517                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3518                         return -EINVAL;
3519         }
3520
3521         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3522                 settings->wpa_versions =
3523                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3524                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3525                         return -EINVAL;
3526         }
3527
3528         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3529                 void *data;
3530                 int len, i;
3531
3532                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3533                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3534                 settings->n_akm_suites = len / sizeof(u32);
3535
3536                 if (len % sizeof(u32))
3537                         return -EINVAL;
3538
3539                 memcpy(settings->akm_suites, data, len);
3540
3541                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3542                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3543                                 return -EINVAL;
3544         }
3545
3546         return 0;
3547 }
3548
3549 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3550 {
3551         struct cfg80211_registered_device *rdev;
3552         struct net_device *dev;
3553         struct wireless_dev *wdev;
3554         struct cfg80211_crypto_settings crypto;
3555         struct ieee80211_channel *chan, *fixedchan;
3556         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3557         int err, ssid_len, ie_len = 0;
3558         bool use_mfp = false;
3559
3560         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3561                 return -EINVAL;
3562
3563         if (!info->attrs[NL80211_ATTR_MAC] ||
3564             !info->attrs[NL80211_ATTR_SSID] ||
3565             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3566                 return -EINVAL;
3567
3568         rtnl_lock();
3569
3570         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3571         if (err)
3572                 goto unlock_rtnl;
3573
3574         if (!rdev->ops->assoc) {
3575                 err = -EOPNOTSUPP;
3576                 goto out;
3577         }
3578
3579         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3580                 err = -EOPNOTSUPP;
3581                 goto out;
3582         }
3583
3584         if (!netif_running(dev)) {
3585                 err = -ENETDOWN;
3586                 goto out;
3587         }
3588
3589         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3590
3591         chan = ieee80211_get_channel(&rdev->wiphy,
3592                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3593         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3594                 err = -EINVAL;
3595                 goto out;
3596         }
3597
3598         mutex_lock(&rdev->devlist_mtx);
3599         wdev = dev->ieee80211_ptr;
3600         fixedchan = rdev_fixed_channel(rdev, wdev);
3601         if (fixedchan && chan != fixedchan) {
3602                 err = -EBUSY;
3603                 mutex_unlock(&rdev->devlist_mtx);
3604                 goto out;
3605         }
3606         mutex_unlock(&rdev->devlist_mtx);
3607
3608         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3609         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3610
3611         if (info->attrs[NL80211_ATTR_IE]) {
3612                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3613                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3614         }
3615
3616         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3617                 enum nl80211_mfp mfp =
3618                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3619                 if (mfp == NL80211_MFP_REQUIRED)
3620                         use_mfp = true;
3621                 else if (mfp != NL80211_MFP_NO) {
3622                         err = -EINVAL;
3623                         goto out;
3624                 }
3625         }
3626
3627         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3628                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3629
3630         err = nl80211_crypto_settings(info, &crypto, 1);
3631         if (!err)
3632                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3633                                           ssid, ssid_len, ie, ie_len, use_mfp,
3634                                           &crypto);
3635
3636 out:
3637         cfg80211_unlock_rdev(rdev);
3638         dev_put(dev);
3639 unlock_rtnl:
3640         rtnl_unlock();
3641         return err;
3642 }
3643
3644 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3645 {
3646         struct cfg80211_registered_device *rdev;
3647         struct net_device *dev;
3648         const u8 *ie = NULL, *bssid;
3649         int err, ie_len = 0;
3650         u16 reason_code;
3651
3652         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3653                 return -EINVAL;
3654
3655         if (!info->attrs[NL80211_ATTR_MAC])
3656                 return -EINVAL;
3657
3658         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3659                 return -EINVAL;
3660
3661         rtnl_lock();
3662
3663         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3664         if (err)
3665                 goto unlock_rtnl;
3666
3667         if (!rdev->ops->deauth) {
3668                 err = -EOPNOTSUPP;
3669                 goto out;
3670         }
3671
3672         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3673                 err = -EOPNOTSUPP;
3674                 goto out;
3675         }
3676
3677         if (!netif_running(dev)) {
3678                 err = -ENETDOWN;
3679                 goto out;
3680         }
3681
3682         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3683
3684         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3685         if (reason_code == 0) {
3686                 /* Reason Code 0 is reserved */
3687                 err = -EINVAL;
3688                 goto out;
3689         }
3690
3691         if (info->attrs[NL80211_ATTR_IE]) {
3692                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3693                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3694         }
3695
3696         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3697
3698 out:
3699         cfg80211_unlock_rdev(rdev);
3700         dev_put(dev);
3701 unlock_rtnl:
3702         rtnl_unlock();
3703         return err;
3704 }
3705
3706 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3707 {
3708         struct cfg80211_registered_device *rdev;
3709         struct net_device *dev;
3710         const u8 *ie = NULL, *bssid;
3711         int err, ie_len = 0;
3712         u16 reason_code;
3713
3714         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3715                 return -EINVAL;
3716
3717         if (!info->attrs[NL80211_ATTR_MAC])
3718                 return -EINVAL;
3719
3720         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3721                 return -EINVAL;
3722
3723         rtnl_lock();
3724
3725         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3726         if (err)
3727                 goto unlock_rtnl;
3728
3729         if (!rdev->ops->disassoc) {
3730                 err = -EOPNOTSUPP;
3731                 goto out;
3732         }
3733
3734         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3735                 err = -EOPNOTSUPP;
3736                 goto out;
3737         }
3738
3739         if (!netif_running(dev)) {
3740                 err = -ENETDOWN;
3741                 goto out;
3742         }
3743
3744         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3745
3746         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3747         if (reason_code == 0) {
3748                 /* Reason Code 0 is reserved */
3749                 err = -EINVAL;
3750                 goto out;
3751         }
3752
3753         if (info->attrs[NL80211_ATTR_IE]) {
3754                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3755                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3756         }
3757
3758         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3759
3760 out:
3761         cfg80211_unlock_rdev(rdev);
3762         dev_put(dev);
3763 unlock_rtnl:
3764         rtnl_unlock();
3765         return err;
3766 }
3767
3768 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3769 {
3770         struct cfg80211_registered_device *rdev;
3771         struct net_device *dev;
3772         struct cfg80211_ibss_params ibss;
3773         struct wiphy *wiphy;
3774         struct cfg80211_cached_keys *connkeys = NULL;
3775         int err;
3776
3777         memset(&ibss, 0, sizeof(ibss));
3778
3779         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3780                 return -EINVAL;
3781
3782         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3783             !info->attrs[NL80211_ATTR_SSID] ||
3784             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3785                 return -EINVAL;
3786
3787         ibss.beacon_interval = 100;
3788
3789         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3790                 ibss.beacon_interval =
3791                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3792                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3793                         return -EINVAL;
3794         }
3795
3796         rtnl_lock();
3797
3798         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3799         if (err)
3800                 goto unlock_rtnl;
3801
3802         if (!rdev->ops->join_ibss) {
3803                 err = -EOPNOTSUPP;
3804                 goto out;
3805         }
3806
3807         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3808                 err = -EOPNOTSUPP;
3809                 goto out;
3810         }
3811
3812         if (!netif_running(dev)) {
3813                 err = -ENETDOWN;
3814                 goto out;
3815         }
3816
3817         wiphy = &rdev->wiphy;
3818
3819         if (info->attrs[NL80211_ATTR_MAC])
3820                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3821         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3822         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3823
3824         if (info->attrs[NL80211_ATTR_IE]) {
3825                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3826                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3827         }
3828
3829         ibss.channel = ieee80211_get_channel(wiphy,
3830                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3831         if (!ibss.channel ||
3832             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3833             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3834                 err = -EINVAL;
3835                 goto out;
3836         }
3837
3838         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3839         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3840
3841         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3842                 connkeys = nl80211_parse_connkeys(rdev,
3843                                         info->attrs[NL80211_ATTR_KEYS]);
3844                 if (IS_ERR(connkeys)) {
3845                         err = PTR_ERR(connkeys);
3846                         connkeys = NULL;
3847                         goto out;
3848                 }
3849         }
3850
3851         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3852
3853 out:
3854         cfg80211_unlock_rdev(rdev);
3855         dev_put(dev);
3856 unlock_rtnl:
3857         if (err)
3858                 kfree(connkeys);
3859         rtnl_unlock();
3860         return err;
3861 }
3862
3863 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3864 {
3865         struct cfg80211_registered_device *rdev;
3866         struct net_device *dev;
3867         int err;
3868
3869         rtnl_lock();
3870
3871         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3872         if (err)
3873                 goto unlock_rtnl;
3874
3875         if (!rdev->ops->leave_ibss) {
3876                 err = -EOPNOTSUPP;
3877                 goto out;
3878         }
3879
3880         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3881                 err = -EOPNOTSUPP;
3882                 goto out;
3883         }
3884
3885         if (!netif_running(dev)) {
3886                 err = -ENETDOWN;
3887                 goto out;
3888         }
3889
3890         err = cfg80211_leave_ibss(rdev, dev, false);
3891
3892 out:
3893         cfg80211_unlock_rdev(rdev);
3894         dev_put(dev);
3895 unlock_rtnl:
3896         rtnl_unlock();
3897         return err;
3898 }
3899
3900 #ifdef CONFIG_NL80211_TESTMODE
3901 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3902         .name = "testmode",
3903 };
3904
3905 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3906 {
3907         struct cfg80211_registered_device *rdev;
3908         int err;
3909
3910         if (!info->attrs[NL80211_ATTR_TESTDATA])
3911                 return -EINVAL;
3912
3913         rtnl_lock();
3914
3915         rdev = cfg80211_get_dev_from_info(info);
3916         if (IS_ERR(rdev)) {
3917                 err = PTR_ERR(rdev);
3918                 goto unlock_rtnl;
3919         }
3920
3921         err = -EOPNOTSUPP;
3922         if (rdev->ops->testmode_cmd) {
3923                 rdev->testmode_info = info;
3924                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3925                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3926                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3927                 rdev->testmode_info = NULL;
3928         }
3929
3930         cfg80211_unlock_rdev(rdev);
3931
3932  unlock_rtnl:
3933         rtnl_unlock();
3934         return err;
3935 }
3936
3937 static struct sk_buff *
3938 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3939                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3940 {
3941         struct sk_buff *skb;
3942         void *hdr;
3943         struct nlattr *data;
3944
3945         skb = nlmsg_new(approxlen + 100, gfp);
3946         if (!skb)
3947                 return NULL;
3948
3949         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3950         if (!hdr) {
3951                 kfree_skb(skb);
3952                 return NULL;
3953         }
3954
3955         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3956         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3957
3958         ((void **)skb->cb)[0] = rdev;
3959         ((void **)skb->cb)[1] = hdr;
3960         ((void **)skb->cb)[2] = data;
3961
3962         return skb;
3963
3964  nla_put_failure:
3965         kfree_skb(skb);
3966         return NULL;
3967 }
3968
3969 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3970                                                   int approxlen)
3971 {
3972         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3973
3974         if (WARN_ON(!rdev->testmode_info))
3975                 return NULL;
3976
3977         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3978                                 rdev->testmode_info->snd_pid,
3979                                 rdev->testmode_info->snd_seq,
3980                                 GFP_KERNEL);
3981 }
3982 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3983
3984 int cfg80211_testmode_reply(struct sk_buff *skb)
3985 {
3986         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3987         void *hdr = ((void **)skb->cb)[1];
3988         struct nlattr *data = ((void **)skb->cb)[2];
3989
3990         if (WARN_ON(!rdev->testmode_info)) {
3991                 kfree_skb(skb);
3992                 return -EINVAL;
3993         }
3994
3995         nla_nest_end(skb, data);
3996         genlmsg_end(skb, hdr);
3997         return genlmsg_reply(skb, rdev->testmode_info);
3998 }
3999 EXPORT_SYMBOL(cfg80211_testmode_reply);
4000
4001 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4002                                                   int approxlen, gfp_t gfp)
4003 {
4004         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4005
4006         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4007 }
4008 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4009
4010 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4011 {
4012         void *hdr = ((void **)skb->cb)[1];
4013         struct nlattr *data = ((void **)skb->cb)[2];
4014
4015         nla_nest_end(skb, data);
4016         genlmsg_end(skb, hdr);
4017         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4018 }
4019 EXPORT_SYMBOL(cfg80211_testmode_event);
4020 #endif
4021
4022 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4023 {
4024         struct cfg80211_registered_device *rdev;
4025         struct net_device *dev;
4026         struct cfg80211_connect_params connect;
4027         struct wiphy *wiphy;
4028         struct cfg80211_cached_keys *connkeys = NULL;
4029         int err;
4030
4031         memset(&connect, 0, sizeof(connect));
4032
4033         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4034                 return -EINVAL;
4035
4036         if (!info->attrs[NL80211_ATTR_SSID] ||
4037             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4038                 return -EINVAL;
4039
4040         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4041                 connect.auth_type =
4042                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4043                 if (!nl80211_valid_auth_type(connect.auth_type))
4044                         return -EINVAL;
4045         } else
4046                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4047
4048         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4049
4050         err = nl80211_crypto_settings(info, &connect.crypto,
4051                                       NL80211_MAX_NR_CIPHER_SUITES);
4052         if (err)
4053                 return err;
4054         rtnl_lock();
4055
4056         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4057         if (err)
4058                 goto unlock_rtnl;
4059
4060         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4061                 err = -EOPNOTSUPP;
4062                 goto out;
4063         }
4064
4065         if (!netif_running(dev)) {
4066                 err = -ENETDOWN;
4067                 goto out;
4068         }
4069
4070         wiphy = &rdev->wiphy;
4071
4072         if (info->attrs[NL80211_ATTR_MAC])
4073                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4074         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4075         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4076
4077         if (info->attrs[NL80211_ATTR_IE]) {
4078                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4079                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4080         }
4081
4082         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4083                 connect.channel =
4084                         ieee80211_get_channel(wiphy,
4085                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4086                 if (!connect.channel ||
4087                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4088                         err = -EINVAL;
4089                         goto out;
4090                 }
4091         }
4092
4093         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4094                 connkeys = nl80211_parse_connkeys(rdev,
4095                                         info->attrs[NL80211_ATTR_KEYS]);
4096                 if (IS_ERR(connkeys)) {
4097                         err = PTR_ERR(connkeys);
4098                         connkeys = NULL;
4099                         goto out;
4100                 }
4101         }
4102
4103         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4104
4105 out:
4106         cfg80211_unlock_rdev(rdev);
4107         dev_put(dev);
4108 unlock_rtnl:
4109         if (err)
4110                 kfree(connkeys);
4111         rtnl_unlock();
4112         return err;
4113 }
4114
4115 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4116 {
4117         struct cfg80211_registered_device *rdev;
4118         struct net_device *dev;
4119         int err;
4120         u16 reason;
4121
4122         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4123                 reason = WLAN_REASON_DEAUTH_LEAVING;
4124         else
4125                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4126
4127         if (reason == 0)
4128                 return -EINVAL;
4129
4130         rtnl_lock();
4131
4132         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4133         if (err)
4134                 goto unlock_rtnl;
4135
4136         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4137                 err = -EOPNOTSUPP;
4138                 goto out;
4139         }
4140
4141         if (!netif_running(dev)) {
4142                 err = -ENETDOWN;
4143                 goto out;
4144         }
4145
4146         err = cfg80211_disconnect(rdev, dev, reason, true);
4147
4148 out:
4149         cfg80211_unlock_rdev(rdev);
4150         dev_put(dev);
4151 unlock_rtnl:
4152         rtnl_unlock();
4153         return err;
4154 }
4155
4156 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4157 {
4158         struct cfg80211_registered_device *rdev;
4159         struct net *net;
4160         int err;
4161         u32 pid;
4162
4163         if (!info->attrs[NL80211_ATTR_PID])
4164                 return -EINVAL;
4165
4166         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4167
4168         rtnl_lock();
4169
4170         rdev = cfg80211_get_dev_from_info(info);
4171         if (IS_ERR(rdev)) {
4172                 err = PTR_ERR(rdev);
4173                 goto out_rtnl;
4174         }
4175
4176         net = get_net_ns_by_pid(pid);
4177         if (IS_ERR(net)) {
4178                 err = PTR_ERR(net);
4179                 goto out;
4180         }
4181
4182         err = 0;
4183
4184         /* check if anything to do */
4185         if (net_eq(wiphy_net(&rdev->wiphy), net))
4186                 goto out_put_net;
4187
4188         err = cfg80211_switch_netns(rdev, net);
4189  out_put_net:
4190         put_net(net);
4191  out:
4192         cfg80211_unlock_rdev(rdev);
4193  out_rtnl:
4194         rtnl_unlock();
4195         return err;
4196 }
4197
4198 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4199 {
4200         struct cfg80211_registered_device *rdev;
4201         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4202                         struct cfg80211_pmksa *pmksa) = NULL;
4203         int err;
4204         struct net_device *dev;
4205         struct cfg80211_pmksa pmksa;
4206
4207         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4208
4209         if (!info->attrs[NL80211_ATTR_MAC])
4210                 return -EINVAL;
4211
4212         if (!info->attrs[NL80211_ATTR_PMKID])
4213                 return -EINVAL;
4214
4215         rtnl_lock();
4216
4217         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4218         if (err)
4219                 goto out_rtnl;
4220
4221         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4222         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4223
4224         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4225                 err = -EOPNOTSUPP;
4226                 goto out;
4227         }
4228
4229         switch (info->genlhdr->cmd) {
4230         case NL80211_CMD_SET_PMKSA:
4231                 rdev_ops = rdev->ops->set_pmksa;
4232                 break;
4233         case NL80211_CMD_DEL_PMKSA:
4234                 rdev_ops = rdev->ops->del_pmksa;
4235                 break;
4236         default:
4237                 WARN_ON(1);
4238                 break;
4239         }
4240
4241         if (!rdev_ops) {
4242                 err = -EOPNOTSUPP;
4243                 goto out;
4244         }
4245
4246         err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4247
4248  out:
4249         cfg80211_unlock_rdev(rdev);
4250         dev_put(dev);
4251  out_rtnl:
4252         rtnl_unlock();
4253
4254         return err;
4255 }
4256
4257 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4258 {
4259         struct cfg80211_registered_device *rdev;
4260         int err;
4261         struct net_device *dev;
4262
4263         rtnl_lock();
4264
4265         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4266         if (err)
4267                 goto out_rtnl;
4268
4269         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4270                 err = -EOPNOTSUPP;
4271                 goto out;
4272         }
4273
4274         if (!rdev->ops->flush_pmksa) {
4275                 err = -EOPNOTSUPP;
4276                 goto out;
4277         }
4278
4279         err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4280
4281  out:
4282         cfg80211_unlock_rdev(rdev);
4283         dev_put(dev);
4284  out_rtnl:
4285         rtnl_unlock();
4286
4287         return err;
4288
4289 }
4290
4291 static int nl80211_remain_on_channel(struct sk_buff *skb,
4292                                      struct genl_info *info)
4293 {
4294         struct cfg80211_registered_device *rdev;
4295         struct net_device *dev;
4296         struct ieee80211_channel *chan;
4297         struct sk_buff *msg;
4298         void *hdr;
4299         u64 cookie;
4300         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4301         u32 freq, duration;
4302         int err;
4303
4304         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4305             !info->attrs[NL80211_ATTR_DURATION])
4306                 return -EINVAL;
4307
4308         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4309
4310         /*
4311          * We should be on that channel for at least one jiffie,
4312          * and more than 5 seconds seems excessive.
4313          */
4314         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4315                 return -EINVAL;
4316
4317         rtnl_lock();
4318
4319         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4320         if (err)
4321                 goto unlock_rtnl;
4322
4323         if (!rdev->ops->remain_on_channel) {
4324                 err = -EOPNOTSUPP;
4325                 goto out;
4326         }
4327
4328         if (!netif_running(dev)) {
4329                 err = -ENETDOWN;
4330                 goto out;
4331         }
4332
4333         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4334                 channel_type = nla_get_u32(
4335                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4336                 if (channel_type != NL80211_CHAN_NO_HT &&
4337                     channel_type != NL80211_CHAN_HT20 &&
4338                     channel_type != NL80211_CHAN_HT40PLUS &&
4339                     channel_type != NL80211_CHAN_HT40MINUS)
4340                         err = -EINVAL;
4341                         goto out;
4342         }
4343
4344         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4345         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4346         if (chan == NULL) {
4347                 err = -EINVAL;
4348                 goto out;
4349         }
4350
4351         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4352         if (!msg) {
4353                 err = -ENOMEM;
4354                 goto out;
4355         }
4356
4357         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4358                              NL80211_CMD_REMAIN_ON_CHANNEL);
4359
4360         if (IS_ERR(hdr)) {
4361                 err = PTR_ERR(hdr);
4362                 goto free_msg;
4363         }
4364
4365         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4366                                            channel_type, duration, &cookie);
4367
4368         if (err)
4369                 goto free_msg;
4370
4371         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4372
4373         genlmsg_end(msg, hdr);
4374         err = genlmsg_reply(msg, info);
4375         goto out;
4376
4377  nla_put_failure:
4378         err = -ENOBUFS;
4379  free_msg:
4380         nlmsg_free(msg);
4381  out:
4382         cfg80211_unlock_rdev(rdev);
4383         dev_put(dev);
4384  unlock_rtnl:
4385         rtnl_unlock();
4386         return err;
4387 }
4388
4389 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4390                                             struct genl_info *info)
4391 {
4392         struct cfg80211_registered_device *rdev;
4393         struct net_device *dev;
4394         u64 cookie;
4395         int err;
4396
4397         if (!info->attrs[NL80211_ATTR_COOKIE])
4398                 return -EINVAL;
4399
4400         rtnl_lock();
4401
4402         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4403         if (err)
4404                 goto unlock_rtnl;
4405
4406         if (!rdev->ops->cancel_remain_on_channel) {
4407                 err = -EOPNOTSUPP;
4408                 goto out;
4409         }
4410
4411         if (!netif_running(dev)) {
4412                 err = -ENETDOWN;
4413                 goto out;
4414         }
4415
4416         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4417
4418         err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4419
4420  out:
4421         cfg80211_unlock_rdev(rdev);
4422         dev_put(dev);
4423  unlock_rtnl:
4424         rtnl_unlock();
4425         return err;
4426 }
4427
4428 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4429                            u8 *rates, u8 rates_len)
4430 {
4431         u8 i;
4432         u32 mask = 0;
4433
4434         for (i = 0; i < rates_len; i++) {
4435                 int rate = (rates[i] & 0x7f) * 5;
4436                 int ridx;
4437                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4438                         struct ieee80211_rate *srate =
4439                                 &sband->bitrates[ridx];
4440                         if (rate == srate->bitrate) {
4441                                 mask |= 1 << ridx;
4442                                 break;
4443                         }
4444                 }
4445                 if (ridx == sband->n_bitrates)
4446                         return 0; /* rate not found */
4447         }
4448
4449         return mask;
4450 }
4451
4452 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4453         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4454                                     .len = NL80211_MAX_SUPP_RATES },
4455 };
4456
4457 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4458                                        struct genl_info *info)
4459 {
4460         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4461         struct cfg80211_registered_device *rdev;
4462         struct cfg80211_bitrate_mask mask;
4463         int err, rem, i;
4464         struct net_device *dev;
4465         struct nlattr *tx_rates;
4466         struct ieee80211_supported_band *sband;
4467
4468         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4469                 return -EINVAL;
4470
4471         rtnl_lock();
4472
4473         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4474         if (err)
4475                 goto unlock_rtnl;
4476
4477         if (!rdev->ops->set_bitrate_mask) {
4478                 err = -EOPNOTSUPP;
4479                 goto unlock;
4480         }
4481
4482         memset(&mask, 0, sizeof(mask));
4483         /* Default to all rates enabled */
4484         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4485                 sband = rdev->wiphy.bands[i];
4486                 mask.control[i].legacy =
4487                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4488         }
4489
4490         /*
4491          * The nested attribute uses enum nl80211_band as the index. This maps
4492          * directly to the enum ieee80211_band values used in cfg80211.
4493          */
4494         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4495         {
4496                 enum ieee80211_band band = nla_type(tx_rates);
4497                 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4498                         err = -EINVAL;
4499                         goto unlock;
4500                 }
4501                 sband = rdev->wiphy.bands[band];
4502                 if (sband == NULL) {
4503                         err = -EINVAL;
4504                         goto unlock;
4505                 }
4506                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4507                           nla_len(tx_rates), nl80211_txattr_policy);
4508                 if (tb[NL80211_TXRATE_LEGACY]) {
4509                         mask.control[band].legacy = rateset_to_mask(
4510                                 sband,
4511                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4512                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4513                         if (mask.control[band].legacy == 0) {
4514                                 err = -EINVAL;
4515                                 goto unlock;
4516                         }
4517                 }
4518         }
4519
4520         err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4521
4522  unlock:
4523         dev_put(dev);
4524         cfg80211_unlock_rdev(rdev);
4525  unlock_rtnl:
4526         rtnl_unlock();
4527         return err;
4528 }
4529
4530 static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
4531 {
4532         struct cfg80211_registered_device *rdev;
4533         struct net_device *dev;
4534         int err;
4535
4536         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4537                 return -EINVAL;
4538
4539         if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
4540                 return -EINVAL;
4541
4542         rtnl_lock();
4543
4544         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4545         if (err)
4546                 goto unlock_rtnl;
4547
4548         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4549                 err = -EOPNOTSUPP;
4550                 goto out;
4551         }
4552
4553         /* not much point in registering if we can't reply */
4554         if (!rdev->ops->action) {
4555                 err = -EOPNOTSUPP;
4556                 goto out;
4557         }
4558
4559         err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
4560                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4561                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4562  out:
4563         cfg80211_unlock_rdev(rdev);
4564         dev_put(dev);
4565  unlock_rtnl:
4566         rtnl_unlock();
4567         return err;
4568 }
4569
4570 static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
4571 {
4572         struct cfg80211_registered_device *rdev;
4573         struct net_device *dev;
4574         struct ieee80211_channel *chan;
4575         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4576         u32 freq;
4577         int err;
4578         void *hdr;
4579         u64 cookie;
4580         struct sk_buff *msg;
4581
4582         if (!info->attrs[NL80211_ATTR_FRAME] ||
4583             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4584                 return -EINVAL;
4585
4586         rtnl_lock();
4587
4588         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4589         if (err)
4590                 goto unlock_rtnl;
4591
4592         if (!rdev->ops->action) {
4593                 err = -EOPNOTSUPP;
4594                 goto out;
4595         }
4596
4597         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4598                 err = -EOPNOTSUPP;
4599                 goto out;
4600         }
4601
4602         if (!netif_running(dev)) {
4603                 err = -ENETDOWN;
4604                 goto out;
4605         }
4606
4607         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4608                 channel_type = nla_get_u32(
4609                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4610                 if (channel_type != NL80211_CHAN_NO_HT &&
4611                     channel_type != NL80211_CHAN_HT20 &&
4612                     channel_type != NL80211_CHAN_HT40PLUS &&
4613                     channel_type != NL80211_CHAN_HT40MINUS)
4614                         err = -EINVAL;
4615                         goto out;
4616         }
4617
4618         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4619         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4620         if (chan == NULL) {
4621                 err = -EINVAL;
4622                 goto out;
4623         }
4624
4625         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4626         if (!msg) {
4627                 err = -ENOMEM;
4628                 goto out;
4629         }
4630
4631         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4632                              NL80211_CMD_ACTION);
4633
4634         if (IS_ERR(hdr)) {
4635                 err = PTR_ERR(hdr);
4636                 goto free_msg;
4637         }
4638         err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
4639                                    nla_data(info->attrs[NL80211_ATTR_FRAME]),
4640                                    nla_len(info->attrs[NL80211_ATTR_FRAME]),
4641                                    &cookie);
4642         if (err)
4643                 goto free_msg;
4644
4645         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4646
4647         genlmsg_end(msg, hdr);
4648         err = genlmsg_reply(msg, info);
4649         goto out;
4650
4651  nla_put_failure:
4652         err = -ENOBUFS;
4653  free_msg:
4654         nlmsg_free(msg);
4655  out:
4656         cfg80211_unlock_rdev(rdev);
4657         dev_put(dev);
4658 unlock_rtnl:
4659         rtnl_unlock();
4660         return err;
4661 }
4662
4663 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4664 {
4665         struct cfg80211_registered_device *rdev;
4666         struct wireless_dev *wdev;
4667         struct net_device *dev;
4668         u8 ps_state;
4669         bool state;
4670         int err;
4671
4672         if (!info->attrs[NL80211_ATTR_PS_STATE]) {
4673                 err = -EINVAL;
4674                 goto out;
4675         }
4676
4677         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4678
4679         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
4680                 err = -EINVAL;
4681                 goto out;
4682         }
4683
4684         rtnl_lock();
4685
4686         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4687         if (err)
4688                 goto unlock_rdev;
4689
4690         wdev = dev->ieee80211_ptr;
4691
4692         if (!rdev->ops->set_power_mgmt) {
4693                 err = -EOPNOTSUPP;
4694                 goto unlock_rdev;
4695         }
4696
4697         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4698
4699         if (state == wdev->ps)
4700                 goto unlock_rdev;
4701
4702         wdev->ps = state;
4703
4704         if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
4705                                       wdev->ps_timeout))
4706                 /* assume this means it's off */
4707                 wdev->ps = false;
4708
4709 unlock_rdev:
4710         cfg80211_unlock_rdev(rdev);
4711         dev_put(dev);
4712         rtnl_unlock();
4713
4714 out:
4715         return err;
4716 }
4717
4718 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4719 {
4720         struct cfg80211_registered_device *rdev;
4721         enum nl80211_ps_state ps_state;
4722         struct wireless_dev *wdev;
4723         struct net_device *dev;
4724         struct sk_buff *msg;
4725         void *hdr;
4726         int err;
4727
4728         rtnl_lock();
4729
4730         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4731         if (err)
4732                 goto unlock_rtnl;
4733
4734         wdev = dev->ieee80211_ptr;
4735
4736         if (!rdev->ops->set_power_mgmt) {
4737                 err = -EOPNOTSUPP;
4738                 goto out;
4739         }
4740
4741         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4742         if (!msg) {
4743                 err = -ENOMEM;
4744                 goto out;
4745         }
4746
4747         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4748                              NL80211_CMD_GET_POWER_SAVE);
4749         if (!hdr) {
4750                 err = -ENOMEM;
4751                 goto free_msg;
4752         }
4753
4754         if (wdev->ps)
4755                 ps_state = NL80211_PS_ENABLED;
4756         else
4757                 ps_state = NL80211_PS_DISABLED;
4758
4759         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4760
4761         genlmsg_end(msg, hdr);
4762         err = genlmsg_reply(msg, info);
4763         goto out;
4764
4765 nla_put_failure:
4766         err = -ENOBUFS;
4767
4768 free_msg:
4769         nlmsg_free(msg);
4770
4771 out:
4772         cfg80211_unlock_rdev(rdev);
4773         dev_put(dev);
4774
4775 unlock_rtnl:
4776         rtnl_unlock();
4777
4778         return err;
4779 }
4780
4781 static struct genl_ops nl80211_ops[] = {
4782         {
4783                 .cmd = NL80211_CMD_GET_WIPHY,
4784                 .doit = nl80211_get_wiphy,
4785                 .dumpit = nl80211_dump_wiphy,
4786                 .policy = nl80211_policy,
4787                 /* can be retrieved by unprivileged users */
4788         },
4789         {
4790                 .cmd = NL80211_CMD_SET_WIPHY,
4791                 .doit = nl80211_set_wiphy,
4792                 .policy = nl80211_policy,
4793                 .flags = GENL_ADMIN_PERM,
4794         },
4795         {
4796                 .cmd = NL80211_CMD_GET_INTERFACE,
4797                 .doit = nl80211_get_interface,
4798                 .dumpit = nl80211_dump_interface,
4799                 .policy = nl80211_policy,
4800                 /* can be retrieved by unprivileged users */
4801         },
4802         {
4803                 .cmd = NL80211_CMD_SET_INTERFACE,
4804                 .doit = nl80211_set_interface,
4805                 .policy = nl80211_policy,
4806                 .flags = GENL_ADMIN_PERM,
4807         },
4808         {
4809                 .cmd = NL80211_CMD_NEW_INTERFACE,
4810                 .doit = nl80211_new_interface,
4811                 .policy = nl80211_policy,
4812                 .flags = GENL_ADMIN_PERM,
4813         },
4814         {
4815                 .cmd = NL80211_CMD_DEL_INTERFACE,
4816                 .doit = nl80211_del_interface,
4817                 .policy = nl80211_policy,
4818                 .flags = GENL_ADMIN_PERM,
4819         },
4820         {
4821                 .cmd = NL80211_CMD_GET_KEY,
4822                 .doit = nl80211_get_key,
4823                 .policy = nl80211_policy,
4824                 .flags = GENL_ADMIN_PERM,
4825         },
4826         {
4827                 .cmd = NL80211_CMD_SET_KEY,
4828                 .doit = nl80211_set_key,
4829                 .policy = nl80211_policy,
4830                 .flags = GENL_ADMIN_PERM,
4831         },
4832         {
4833                 .cmd = NL80211_CMD_NEW_KEY,
4834                 .doit = nl80211_new_key,
4835                 .policy = nl80211_policy,
4836                 .flags = GENL_ADMIN_PERM,
4837         },
4838         {
4839                 .cmd = NL80211_CMD_DEL_KEY,
4840                 .doit = nl80211_del_key,
4841                 .policy = nl80211_policy,
4842                 .flags = GENL_ADMIN_PERM,
4843         },
4844         {
4845                 .cmd = NL80211_CMD_SET_BEACON,
4846                 .policy = nl80211_policy,
4847                 .flags = GENL_ADMIN_PERM,
4848                 .doit = nl80211_addset_beacon,
4849         },
4850         {
4851                 .cmd = NL80211_CMD_NEW_BEACON,
4852                 .policy = nl80211_policy,
4853                 .flags = GENL_ADMIN_PERM,
4854                 .doit = nl80211_addset_beacon,
4855         },
4856         {
4857                 .cmd = NL80211_CMD_DEL_BEACON,
4858                 .policy = nl80211_policy,
4859                 .flags = GENL_ADMIN_PERM,
4860                 .doit = nl80211_del_beacon,
4861         },
4862         {
4863                 .cmd = NL80211_CMD_GET_STATION,
4864                 .doit = nl80211_get_station,
4865                 .dumpit = nl80211_dump_station,
4866                 .policy = nl80211_policy,
4867         },
4868         {
4869                 .cmd = NL80211_CMD_SET_STATION,
4870                 .doit = nl80211_set_station,
4871                 .policy = nl80211_policy,
4872                 .flags = GENL_ADMIN_PERM,
4873         },
4874         {
4875                 .cmd = NL80211_CMD_NEW_STATION,
4876                 .doit = nl80211_new_station,
4877                 .policy = nl80211_policy,
4878                 .flags = GENL_ADMIN_PERM,
4879         },
4880         {
4881                 .cmd = NL80211_CMD_DEL_STATION,
4882                 .doit = nl80211_del_station,
4883                 .policy = nl80211_policy,
4884                 .flags = GENL_ADMIN_PERM,
4885         },
4886         {
4887                 .cmd = NL80211_CMD_GET_MPATH,
4888                 .doit = nl80211_get_mpath,
4889                 .dumpit = nl80211_dump_mpath,
4890                 .policy = nl80211_policy,
4891                 .flags = GENL_ADMIN_PERM,
4892         },
4893         {
4894                 .cmd = NL80211_CMD_SET_MPATH,
4895                 .doit = nl80211_set_mpath,
4896                 .policy = nl80211_policy,
4897                 .flags = GENL_ADMIN_PERM,
4898         },
4899         {
4900                 .cmd = NL80211_CMD_NEW_MPATH,
4901                 .doit = nl80211_new_mpath,
4902                 .policy = nl80211_policy,
4903                 .flags = GENL_ADMIN_PERM,
4904         },
4905         {
4906                 .cmd = NL80211_CMD_DEL_MPATH,
4907                 .doit = nl80211_del_mpath,
4908                 .policy = nl80211_policy,
4909                 .flags = GENL_ADMIN_PERM,
4910         },
4911         {
4912                 .cmd = NL80211_CMD_SET_BSS,
4913                 .doit = nl80211_set_bss,
4914                 .policy = nl80211_policy,
4915                 .flags = GENL_ADMIN_PERM,
4916         },
4917         {
4918                 .cmd = NL80211_CMD_GET_REG,
4919                 .doit = nl80211_get_reg,
4920                 .policy = nl80211_policy,
4921                 /* can be retrieved by unprivileged users */
4922         },
4923         {
4924                 .cmd = NL80211_CMD_SET_REG,
4925                 .doit = nl80211_set_reg,
4926                 .policy = nl80211_policy,
4927                 .flags = GENL_ADMIN_PERM,
4928         },
4929         {
4930                 .cmd = NL80211_CMD_REQ_SET_REG,
4931                 .doit = nl80211_req_set_reg,
4932                 .policy = nl80211_policy,
4933                 .flags = GENL_ADMIN_PERM,
4934         },
4935         {
4936                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4937                 .doit = nl80211_get_mesh_params,
4938                 .policy = nl80211_policy,
4939                 /* can be retrieved by unprivileged users */
4940         },
4941         {
4942                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4943                 .doit = nl80211_set_mesh_params,
4944                 .policy = nl80211_policy,
4945                 .flags = GENL_ADMIN_PERM,
4946         },
4947         {
4948                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4949                 .doit = nl80211_trigger_scan,
4950                 .policy = nl80211_policy,
4951                 .flags = GENL_ADMIN_PERM,
4952         },
4953         {
4954                 .cmd = NL80211_CMD_GET_SCAN,
4955                 .policy = nl80211_policy,
4956                 .dumpit = nl80211_dump_scan,
4957         },
4958         {
4959                 .cmd = NL80211_CMD_AUTHENTICATE,
4960                 .doit = nl80211_authenticate,
4961                 .policy = nl80211_policy,
4962                 .flags = GENL_ADMIN_PERM,
4963         },
4964         {
4965                 .cmd = NL80211_CMD_ASSOCIATE,
4966                 .doit = nl80211_associate,
4967                 .policy = nl80211_policy,
4968                 .flags = GENL_ADMIN_PERM,
4969         },
4970         {
4971                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4972                 .doit = nl80211_deauthenticate,
4973                 .policy = nl80211_policy,
4974                 .flags = GENL_ADMIN_PERM,
4975         },
4976         {
4977                 .cmd = NL80211_CMD_DISASSOCIATE,
4978                 .doit = nl80211_disassociate,
4979                 .policy = nl80211_policy,
4980                 .flags = GENL_ADMIN_PERM,
4981         },
4982         {
4983                 .cmd = NL80211_CMD_JOIN_IBSS,
4984                 .doit = nl80211_join_ibss,
4985                 .policy = nl80211_policy,
4986                 .flags = GENL_ADMIN_PERM,
4987         },
4988         {
4989                 .cmd = NL80211_CMD_LEAVE_IBSS,
4990                 .doit = nl80211_leave_ibss,
4991                 .policy = nl80211_policy,
4992                 .flags = GENL_ADMIN_PERM,
4993         },
4994 #ifdef CONFIG_NL80211_TESTMODE
4995         {
4996                 .cmd = NL80211_CMD_TESTMODE,
4997                 .doit = nl80211_testmode_do,
4998                 .policy = nl80211_policy,
4999                 .flags = GENL_ADMIN_PERM,
5000         },
5001 #endif
5002         {
5003                 .cmd = NL80211_CMD_CONNECT,
5004                 .doit = nl80211_connect,
5005                 .policy = nl80211_policy,
5006                 .flags = GENL_ADMIN_PERM,
5007         },
5008         {
5009                 .cmd = NL80211_CMD_DISCONNECT,
5010                 .doit = nl80211_disconnect,
5011                 .policy = nl80211_policy,
5012                 .flags = GENL_ADMIN_PERM,
5013         },
5014         {
5015                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5016                 .doit = nl80211_wiphy_netns,
5017                 .policy = nl80211_policy,
5018                 .flags = GENL_ADMIN_PERM,
5019         },
5020         {
5021                 .cmd = NL80211_CMD_GET_SURVEY,
5022                 .policy = nl80211_policy,
5023                 .dumpit = nl80211_dump_survey,
5024         },
5025         {
5026                 .cmd = NL80211_CMD_SET_PMKSA,
5027                 .doit = nl80211_setdel_pmksa,
5028                 .policy = nl80211_policy,
5029                 .flags = GENL_ADMIN_PERM,
5030         },
5031         {
5032                 .cmd = NL80211_CMD_DEL_PMKSA,
5033                 .doit = nl80211_setdel_pmksa,
5034                 .policy = nl80211_policy,
5035                 .flags = GENL_ADMIN_PERM,
5036         },
5037         {
5038                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5039                 .doit = nl80211_flush_pmksa,
5040                 .policy = nl80211_policy,
5041                 .flags = GENL_ADMIN_PERM,
5042         },
5043         {
5044                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5045                 .doit = nl80211_remain_on_channel,
5046                 .policy = nl80211_policy,
5047                 .flags = GENL_ADMIN_PERM,
5048         },
5049         {
5050                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5051                 .doit = nl80211_cancel_remain_on_channel,
5052                 .policy = nl80211_policy,
5053                 .flags = GENL_ADMIN_PERM,
5054         },
5055         {
5056                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5057                 .doit = nl80211_set_tx_bitrate_mask,
5058                 .policy = nl80211_policy,
5059                 .flags = GENL_ADMIN_PERM,
5060         },
5061         {
5062                 .cmd = NL80211_CMD_REGISTER_ACTION,
5063                 .doit = nl80211_register_action,
5064                 .policy = nl80211_policy,
5065                 .flags = GENL_ADMIN_PERM,
5066         },
5067         {
5068                 .cmd = NL80211_CMD_ACTION,
5069                 .doit = nl80211_action,
5070                 .policy = nl80211_policy,
5071                 .flags = GENL_ADMIN_PERM,
5072         },
5073         {
5074                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5075                 .doit = nl80211_set_power_save,
5076                 .policy = nl80211_policy,
5077                 .flags = GENL_ADMIN_PERM,
5078         },
5079         {
5080                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5081                 .doit = nl80211_get_power_save,
5082                 .policy = nl80211_policy,
5083                 /* can be retrieved by unprivileged users */
5084         },
5085 };
5086
5087 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5088         .name = "mlme",
5089 };
5090
5091 /* multicast groups */
5092 static struct genl_multicast_group nl80211_config_mcgrp = {
5093         .name = "config",
5094 };
5095 static struct genl_multicast_group nl80211_scan_mcgrp = {
5096         .name = "scan",
5097 };
5098 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5099         .name = "regulatory",
5100 };
5101
5102 /* notification functions */
5103
5104 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5105 {
5106         struct sk_buff *msg;
5107
5108         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5109         if (!msg)
5110                 return;
5111
5112         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5113                 nlmsg_free(msg);
5114                 return;
5115         }
5116
5117         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5118                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5119 }
5120
5121 static int nl80211_add_scan_req(struct sk_buff *msg,
5122                                 struct cfg80211_registered_device *rdev)
5123 {
5124         struct cfg80211_scan_request *req = rdev->scan_req;
5125         struct nlattr *nest;
5126         int i;
5127
5128         ASSERT_RDEV_LOCK(rdev);
5129
5130         if (WARN_ON(!req))
5131                 return 0;
5132
5133         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5134         if (!nest)
5135                 goto nla_put_failure;
5136         for (i = 0; i < req->n_ssids; i++)
5137                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5138         nla_nest_end(msg, nest);
5139
5140         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5141         if (!nest)
5142                 goto nla_put_failure;
5143         for (i = 0; i < req->n_channels; i++)
5144                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5145         nla_nest_end(msg, nest);
5146
5147         if (req->ie)
5148                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5149
5150         return 0;
5151  nla_put_failure:
5152         return -ENOBUFS;
5153 }
5154
5155 static int nl80211_send_scan_msg(struct sk_buff *msg,
5156                                  struct cfg80211_registered_device *rdev,
5157                                  struct net_device *netdev,
5158                                  u32 pid, u32 seq, int flags,
5159                                  u32 cmd)
5160 {
5161         void *hdr;
5162
5163         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5164         if (!hdr)
5165                 return -1;
5166
5167         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5168         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5169
5170         /* ignore errors and send incomplete event anyway */
5171         nl80211_add_scan_req(msg, rdev);
5172
5173         return genlmsg_end(msg, hdr);
5174
5175  nla_put_failure:
5176         genlmsg_cancel(msg, hdr);
5177         return -EMSGSIZE;
5178 }
5179
5180 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5181                              struct net_device *netdev)
5182 {
5183         struct sk_buff *msg;
5184
5185         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5186         if (!msg)
5187                 return;
5188
5189         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5190                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5191                 nlmsg_free(msg);
5192                 return;
5193         }
5194
5195         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5196                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5197 }
5198
5199 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5200                             struct net_device *netdev)
5201 {
5202         struct sk_buff *msg;
5203
5204         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5205         if (!msg)
5206                 return;
5207
5208         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5209                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5210                 nlmsg_free(msg);
5211                 return;
5212         }
5213
5214         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5215                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5216 }
5217
5218 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5219                                struct net_device *netdev)
5220 {
5221         struct sk_buff *msg;
5222
5223         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5224         if (!msg)
5225                 return;
5226
5227         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5228                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5229                 nlmsg_free(msg);
5230                 return;
5231         }
5232
5233         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5234                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5235 }
5236
5237 /*
5238  * This can happen on global regulatory changes or device specific settings
5239  * based on custom world regulatory domains.
5240  */
5241 void nl80211_send_reg_change_event(struct regulatory_request *request)
5242 {
5243         struct sk_buff *msg;
5244         void *hdr;
5245
5246         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5247         if (!msg)
5248                 return;
5249
5250         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5251         if (!hdr) {
5252                 nlmsg_free(msg);
5253                 return;
5254         }
5255
5256         /* Userspace can always count this one always being set */
5257         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5258
5259         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5260                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5261                            NL80211_REGDOM_TYPE_WORLD);
5262         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5263                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5264                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5265         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5266                  request->intersect)
5267                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5268                            NL80211_REGDOM_TYPE_INTERSECTION);
5269         else {
5270                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5271                            NL80211_REGDOM_TYPE_COUNTRY);
5272                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5273         }
5274
5275         if (wiphy_idx_valid(request->wiphy_idx))
5276                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5277
5278         if (genlmsg_end(msg, hdr) < 0) {
5279                 nlmsg_free(msg);
5280                 return;
5281         }
5282
5283         rcu_read_lock();
5284         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5285                                 GFP_ATOMIC);
5286         rcu_read_unlock();
5287
5288         return;
5289
5290 nla_put_failure:
5291         genlmsg_cancel(msg, hdr);
5292         nlmsg_free(msg);
5293 }
5294
5295 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5296                                     struct net_device *netdev,
5297                                     const u8 *buf, size_t len,
5298                                     enum nl80211_commands cmd, gfp_t gfp)
5299 {
5300         struct sk_buff *msg;
5301         void *hdr;
5302
5303         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5304         if (!msg)
5305                 return;
5306
5307         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5308         if (!hdr) {
5309                 nlmsg_free(msg);
5310                 return;
5311         }
5312
5313         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5314         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5315         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5316
5317         if (genlmsg_end(msg, hdr) < 0) {
5318                 nlmsg_free(msg);
5319                 return;
5320         }
5321
5322         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5323                                 nl80211_mlme_mcgrp.id, gfp);
5324         return;
5325
5326  nla_put_failure:
5327         genlmsg_cancel(msg, hdr);
5328         nlmsg_free(msg);
5329 }
5330
5331 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5332                           struct net_device *netdev, const u8 *buf,
5333                           size_t len, gfp_t gfp)
5334 {
5335         nl80211_send_mlme_event(rdev, netdev, buf, len,
5336                                 NL80211_CMD_AUTHENTICATE, gfp);
5337 }
5338
5339 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5340                            struct net_device *netdev, const u8 *buf,
5341                            size_t len, gfp_t gfp)
5342 {
5343         nl80211_send_mlme_event(rdev, netdev, buf, len,
5344                                 NL80211_CMD_ASSOCIATE, gfp);
5345 }
5346
5347 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5348                          struct net_device *netdev, const u8 *buf,
5349                          size_t len, gfp_t gfp)
5350 {
5351         nl80211_send_mlme_event(rdev, netdev, buf, len,
5352                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5353 }
5354
5355 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5356                            struct net_device *netdev, const u8 *buf,
5357                            size_t len, gfp_t gfp)
5358 {
5359         nl80211_send_mlme_event(rdev, netdev, buf, len,
5360                                 NL80211_CMD_DISASSOCIATE, gfp);
5361 }
5362
5363 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5364                                       struct net_device *netdev, int cmd,
5365                                       const u8 *addr, gfp_t gfp)
5366 {
5367         struct sk_buff *msg;
5368         void *hdr;
5369
5370         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5371         if (!msg)
5372                 return;
5373
5374         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5375         if (!hdr) {
5376                 nlmsg_free(msg);
5377                 return;
5378         }
5379
5380         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5381         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5382         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5383         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5384
5385         if (genlmsg_end(msg, hdr) < 0) {
5386                 nlmsg_free(msg);
5387                 return;
5388         }
5389
5390         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5391                                 nl80211_mlme_mcgrp.id, gfp);
5392         return;
5393
5394  nla_put_failure:
5395         genlmsg_cancel(msg, hdr);
5396         nlmsg_free(msg);
5397 }
5398
5399 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5400                                struct net_device *netdev, const u8 *addr,
5401                                gfp_t gfp)
5402 {
5403         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5404                                   addr, gfp);
5405 }
5406
5407 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5408                                 struct net_device *netdev, const u8 *addr,
5409                                 gfp_t gfp)
5410 {
5411         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5412                                   addr, gfp);
5413 }
5414
5415 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5416                                  struct net_device *netdev, const u8 *bssid,
5417                                  const u8 *req_ie, size_t req_ie_len,
5418                                  const u8 *resp_ie, size_t resp_ie_len,
5419                                  u16 status, gfp_t gfp)
5420 {
5421         struct sk_buff *msg;
5422         void *hdr;
5423
5424         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5425         if (!msg)
5426                 return;
5427
5428         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5429         if (!hdr) {
5430                 nlmsg_free(msg);
5431                 return;
5432         }
5433
5434         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5435         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5436         if (bssid)
5437                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5438         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5439         if (req_ie)
5440                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5441         if (resp_ie)
5442                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5443
5444         if (genlmsg_end(msg, hdr) < 0) {
5445                 nlmsg_free(msg);
5446                 return;
5447         }
5448
5449         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5450                                 nl80211_mlme_mcgrp.id, gfp);
5451         return;
5452
5453  nla_put_failure:
5454         genlmsg_cancel(msg, hdr);
5455         nlmsg_free(msg);
5456
5457 }
5458
5459 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5460                          struct net_device *netdev, const u8 *bssid,
5461                          const u8 *req_ie, size_t req_ie_len,
5462                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5463 {
5464         struct sk_buff *msg;
5465         void *hdr;
5466
5467         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5468         if (!msg)
5469                 return;
5470
5471         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5472         if (!hdr) {
5473                 nlmsg_free(msg);
5474                 return;
5475         }
5476
5477         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5478         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5479         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5480         if (req_ie)
5481                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5482         if (resp_ie)
5483                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5484
5485         if (genlmsg_end(msg, hdr) < 0) {
5486                 nlmsg_free(msg);
5487                 return;
5488         }
5489
5490         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5491                                 nl80211_mlme_mcgrp.id, gfp);
5492         return;
5493
5494  nla_put_failure:
5495         genlmsg_cancel(msg, hdr);
5496         nlmsg_free(msg);
5497
5498 }
5499
5500 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5501                                struct net_device *netdev, u16 reason,
5502                                const u8 *ie, size_t ie_len, bool from_ap)
5503 {
5504         struct sk_buff *msg;
5505         void *hdr;
5506
5507         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5508         if (!msg)
5509                 return;
5510
5511         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5512         if (!hdr) {
5513                 nlmsg_free(msg);
5514                 return;
5515         }
5516
5517         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5518         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5519         if (from_ap && reason)
5520                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5521         if (from_ap)
5522                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5523         if (ie)
5524                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5525
5526         if (genlmsg_end(msg, hdr) < 0) {
5527                 nlmsg_free(msg);
5528                 return;
5529         }
5530
5531         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5532                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5533         return;
5534
5535  nla_put_failure:
5536         genlmsg_cancel(msg, hdr);
5537         nlmsg_free(msg);
5538
5539 }
5540
5541 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5542                              struct net_device *netdev, const u8 *bssid,
5543                              gfp_t gfp)
5544 {
5545         struct sk_buff *msg;
5546         void *hdr;
5547
5548         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5549         if (!msg)
5550                 return;
5551
5552         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5553         if (!hdr) {
5554                 nlmsg_free(msg);
5555                 return;
5556         }
5557
5558         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5559         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5560         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5561
5562         if (genlmsg_end(msg, hdr) < 0) {
5563                 nlmsg_free(msg);
5564                 return;
5565         }
5566
5567         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5568                                 nl80211_mlme_mcgrp.id, gfp);
5569         return;
5570
5571  nla_put_failure:
5572         genlmsg_cancel(msg, hdr);
5573         nlmsg_free(msg);
5574 }
5575
5576 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5577                                  struct net_device *netdev, const u8 *addr,
5578                                  enum nl80211_key_type key_type, int key_id,
5579                                  const u8 *tsc, gfp_t gfp)
5580 {
5581         struct sk_buff *msg;
5582         void *hdr;
5583
5584         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5585         if (!msg)
5586                 return;
5587
5588         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5589         if (!hdr) {
5590                 nlmsg_free(msg);
5591                 return;
5592         }
5593
5594         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5595         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5596         if (addr)
5597                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5598         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5599         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5600         if (tsc)
5601                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5602
5603         if (genlmsg_end(msg, hdr) < 0) {
5604                 nlmsg_free(msg);
5605                 return;
5606         }
5607
5608         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5609                                 nl80211_mlme_mcgrp.id, gfp);
5610         return;
5611
5612  nla_put_failure:
5613         genlmsg_cancel(msg, hdr);
5614         nlmsg_free(msg);
5615 }
5616
5617 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5618                                     struct ieee80211_channel *channel_before,
5619                                     struct ieee80211_channel *channel_after)
5620 {
5621         struct sk_buff *msg;
5622         void *hdr;
5623         struct nlattr *nl_freq;
5624
5625         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5626         if (!msg)
5627                 return;
5628
5629         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5630         if (!hdr) {
5631                 nlmsg_free(msg);
5632                 return;
5633         }
5634
5635         /*
5636          * Since we are applying the beacon hint to a wiphy we know its
5637          * wiphy_idx is valid
5638          */
5639         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5640
5641         /* Before */
5642         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5643         if (!nl_freq)
5644                 goto nla_put_failure;
5645         if (nl80211_msg_put_channel(msg, channel_before))
5646                 goto nla_put_failure;
5647         nla_nest_end(msg, nl_freq);
5648
5649         /* After */
5650         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5651         if (!nl_freq)
5652                 goto nla_put_failure;
5653         if (nl80211_msg_put_channel(msg, channel_after))
5654                 goto nla_put_failure;
5655         nla_nest_end(msg, nl_freq);
5656
5657         if (genlmsg_end(msg, hdr) < 0) {
5658                 nlmsg_free(msg);
5659                 return;
5660         }
5661
5662         rcu_read_lock();
5663         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5664                                 GFP_ATOMIC);
5665         rcu_read_unlock();
5666
5667         return;
5668
5669 nla_put_failure:
5670         genlmsg_cancel(msg, hdr);
5671         nlmsg_free(msg);
5672 }
5673
5674 static void nl80211_send_remain_on_chan_event(
5675         int cmd, struct cfg80211_registered_device *rdev,
5676         struct net_device *netdev, u64 cookie,
5677         struct ieee80211_channel *chan,
5678         enum nl80211_channel_type channel_type,
5679         unsigned int duration, gfp_t gfp)
5680 {
5681         struct sk_buff *msg;
5682         void *hdr;
5683
5684         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5685         if (!msg)
5686                 return;
5687
5688         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5689         if (!hdr) {
5690                 nlmsg_free(msg);
5691                 return;
5692         }
5693
5694         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5695         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5696         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5697         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5698         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5699
5700         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5701                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5702
5703         if (genlmsg_end(msg, hdr) < 0) {
5704                 nlmsg_free(msg);
5705                 return;
5706         }
5707
5708         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5709                                 nl80211_mlme_mcgrp.id, gfp);
5710         return;
5711
5712  nla_put_failure:
5713         genlmsg_cancel(msg, hdr);
5714         nlmsg_free(msg);
5715 }
5716
5717 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5718                                     struct net_device *netdev, u64 cookie,
5719                                     struct ieee80211_channel *chan,
5720                                     enum nl80211_channel_type channel_type,
5721                                     unsigned int duration, gfp_t gfp)
5722 {
5723         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5724                                           rdev, netdev, cookie, chan,
5725                                           channel_type, duration, gfp);
5726 }
5727
5728 void nl80211_send_remain_on_channel_cancel(
5729         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5730         u64 cookie, struct ieee80211_channel *chan,
5731         enum nl80211_channel_type channel_type, gfp_t gfp)
5732 {
5733         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5734                                           rdev, netdev, cookie, chan,
5735                                           channel_type, 0, gfp);
5736 }
5737
5738 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5739                             struct net_device *dev, const u8 *mac_addr,
5740                             struct station_info *sinfo, gfp_t gfp)
5741 {
5742         struct sk_buff *msg;
5743
5744         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5745         if (!msg)
5746                 return;
5747
5748         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5749                 nlmsg_free(msg);
5750                 return;
5751         }
5752
5753         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5754                                 nl80211_mlme_mcgrp.id, gfp);
5755 }
5756
5757 int nl80211_send_action(struct cfg80211_registered_device *rdev,
5758                         struct net_device *netdev, u32 nlpid,
5759                         int freq, const u8 *buf, size_t len, gfp_t gfp)
5760 {
5761         struct sk_buff *msg;
5762         void *hdr;
5763         int err;
5764
5765         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5766         if (!msg)
5767                 return -ENOMEM;
5768
5769         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
5770         if (!hdr) {
5771                 nlmsg_free(msg);
5772                 return -ENOMEM;
5773         }
5774
5775         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5776         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5777         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5778         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5779
5780         err = genlmsg_end(msg, hdr);
5781         if (err < 0) {
5782                 nlmsg_free(msg);
5783                 return err;
5784         }
5785
5786         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5787         if (err < 0)
5788                 return err;
5789         return 0;
5790
5791  nla_put_failure:
5792         genlmsg_cancel(msg, hdr);
5793         nlmsg_free(msg);
5794         return -ENOBUFS;
5795 }
5796
5797 void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
5798                                    struct net_device *netdev, u64 cookie,
5799                                    const u8 *buf, size_t len, bool ack,
5800                                    gfp_t gfp)
5801 {
5802         struct sk_buff *msg;
5803         void *hdr;
5804
5805         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5806         if (!msg)
5807                 return;
5808
5809         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
5810         if (!hdr) {
5811                 nlmsg_free(msg);
5812                 return;
5813         }
5814
5815         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5816         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5817         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5818         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5819         if (ack)
5820                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5821
5822         if (genlmsg_end(msg, hdr) < 0) {
5823                 nlmsg_free(msg);
5824                 return;
5825         }
5826
5827         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5828         return;
5829
5830  nla_put_failure:
5831         genlmsg_cancel(msg, hdr);
5832         nlmsg_free(msg);
5833 }
5834
5835 static int nl80211_netlink_notify(struct notifier_block * nb,
5836                                   unsigned long state,
5837                                   void *_notify)
5838 {
5839         struct netlink_notify *notify = _notify;
5840         struct cfg80211_registered_device *rdev;
5841         struct wireless_dev *wdev;
5842
5843         if (state != NETLINK_URELEASE)
5844                 return NOTIFY_DONE;
5845
5846         rcu_read_lock();
5847
5848         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
5849                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
5850                         cfg80211_mlme_unregister_actions(wdev, notify->pid);
5851
5852         rcu_read_unlock();
5853
5854         return NOTIFY_DONE;
5855 }
5856
5857 static struct notifier_block nl80211_netlink_notifier = {
5858         .notifier_call = nl80211_netlink_notify,
5859 };
5860
5861 /* initialisation/exit functions */
5862
5863 int nl80211_init(void)
5864 {
5865         int err;
5866
5867         err = genl_register_family_with_ops(&nl80211_fam,
5868                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5869         if (err)
5870                 return err;
5871
5872         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5873         if (err)
5874                 goto err_out;
5875
5876         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5877         if (err)
5878                 goto err_out;
5879
5880         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5881         if (err)
5882                 goto err_out;
5883
5884         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5885         if (err)
5886                 goto err_out;
5887
5888 #ifdef CONFIG_NL80211_TESTMODE
5889         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5890         if (err)
5891                 goto err_out;
5892 #endif
5893
5894         err = netlink_register_notifier(&nl80211_netlink_notifier);
5895         if (err)
5896                 goto err_out;
5897
5898         return 0;
5899  err_out:
5900         genl_unregister_family(&nl80211_fam);
5901         return err;
5902 }
5903
5904 void nl80211_exit(void)
5905 {
5906         netlink_unregister_notifier(&nl80211_netlink_notifier);
5907         genl_unregister_family(&nl80211_fam);
5908 }