net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 /* the netlink family */
  27 static struct genl_family nl80211_fam = {
  28         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  29         .name = "nl80211",      /* have users key off the name instead */
  30         .hdrsize = 0,           /* no private header */
  31         .version = 1,           /* no particular meaning now */
  32         .maxattr = NL80211_ATTR_MAX,
  33         .netnsok = true,
  34 };
  35
  36 /* internal helper: get rdev and dev */
  37 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  38                                        struct cfg80211_registered_device **rdev,
  39                                        struct net_device **dev)
  40 {
  41         struct nlattr **attrs = info->attrs;
  42         int ifindex;
  43
  44         if (!attrs[NL80211_ATTR_IFINDEX])
  45                 return -EINVAL;
  46
  47         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  48         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  49         if (!*dev)
  50                 return -ENODEV;
  51
  52         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  53         if (IS_ERR(*rdev)) {
  54                 dev_put(*dev);
  55                 return PTR_ERR(*rdev);
  56         }
  57
  58         return 0;
  59 }
  60
  61 /* policy for the attributes */
  62 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  63         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  64         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  65                                       .len = 20-1 },
  66         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  67         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  69         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  71         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  72         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  73         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  74
  75         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  77         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  78
  79         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  80         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  81
  82         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  83         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  84                                     .len = WLAN_MAX_KEY_LEN },
  85         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  86         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  87         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  88         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  89
  90         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  91         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  92         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  93                                        .len = IEEE80211_MAX_DATA_LEN },
  94         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  95                                        .len = IEEE80211_MAX_DATA_LEN },
  96         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  97         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  98         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  99         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 100                                                .len = NL80211_MAX_SUPP_RATES },
 101         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 102         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 103         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 104         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 105                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 106         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 107
 108         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 109         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 110
 111         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 113         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 114         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 115                                            .len = NL80211_MAX_SUPP_RATES },
 116
 117         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 120                                          .len = NL80211_HT_CAPABILITY_LEN },
 121
 122         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 123         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 124                               .len = IEEE80211_MAX_DATA_LEN },
 125         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 126         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 127
 128         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 129                                 .len = IEEE80211_MAX_SSID_LEN },
 130         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 131         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 132         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 134         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 135         [NL80211_ATTR_STA_FLAGS2] = {
 136                 .len = sizeof(struct nl80211_sta_flag_update),
 137         },
 138         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 139         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 140         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 141         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 142         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 143         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 144         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 145                                  .len = WLAN_PMKID_LEN },
 146         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 147         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 148         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 149         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 150                                  .len = IEEE80211_MAX_DATA_LEN },
 151         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 152         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 153         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 154         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 155         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 156
 157         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 158         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 159 };
 160
 161 /* policy for the attributes */
 162 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 163         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 164         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 165         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 166         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 167         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 168         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 169 };
 170
 171 /* ifidx get helper */
 172 static int nl80211_get_ifidx(struct netlink_callback *cb)
 173 {
 174         int res;
 175
 176         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 177                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 178                           nl80211_policy);
 179         if (res)
 180                 return res;
 181
 182         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 183                 return -EINVAL;
 184
 185         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 186         if (!res)
 187                 return -EINVAL;
 188         return res;
 189 }
 190
 191 /* IE validation */
 192 static bool is_valid_ie_attr(const struct nlattr *attr)
 193 {
 194         const u8 *pos;
 195         int len;
 196
 197         if (!attr)
 198                 return true;
 199
 200         pos = nla_data(attr);
 201         len = nla_len(attr);
 202
 203         while (len) {
 204                 u8 elemlen;
 205
 206                 if (len < 2)
 207                         return false;
 208                 len -= 2;
 209
 210                 elemlen = pos[1];
 211                 if (elemlen > len)
 212                         return false;
 213
 214                 len -= elemlen;
 215                 pos += 2 + elemlen;
 216         }
 217
 218         return true;
 219 }
 220
 221 /* message building helper */
 222 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 223                                    int flags, u8 cmd)
 224 {
 225         /* since there is no private header just add the generic one */
 226         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 227 }
 228
 229 static int nl80211_msg_put_channel(struct sk_buff *msg,
 230                                    struct ieee80211_channel *chan)
 231 {
 232         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 233                     chan->center_freq);
 234
 235         if (chan->flags & IEEE80211_CHAN_DISABLED)
 236                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 237         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 238                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 239         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 240                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 241         if (chan->flags & IEEE80211_CHAN_RADAR)
 242                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 243
 244         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 245                     DBM_TO_MBM(chan->max_power));
 246
 247         return 0;
 248
 249  nla_put_failure:
 250         return -ENOBUFS;
 251 }
 252
 253 /* netlink command implementations */
 254
 255 struct key_parse {
 256         struct key_params p;
 257         int idx;
 258         bool def, defmgmt;
 259 };
 260
 261 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 262 {
 263         struct nlattr *tb[NL80211_KEY_MAX + 1];
 264         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 265                                    nl80211_key_policy);
 266         if (err)
 267                 return err;
 268
 269         k->def = !!tb[NL80211_KEY_DEFAULT];
 270         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 271
 272         if (tb[NL80211_KEY_IDX])
 273                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 274
 275         if (tb[NL80211_KEY_DATA]) {
 276                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 277                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 278         }
 279
 280         if (tb[NL80211_KEY_SEQ]) {
 281                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 282                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 283         }
 284
 285         if (tb[NL80211_KEY_CIPHER])
 286                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 287
 288         return 0;
 289 }
 290
 291 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 292 {
 293         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 294                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 295                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 296         }
 297
 298         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 299                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 300                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 301         }
 302
 303         if (info->attrs[NL80211_ATTR_KEY_IDX])
 304                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 305
 306         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 307                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 308
 309         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 310         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 311
 312         return 0;
 313 }
 314
 315 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 316 {
 317         int err;
 318
 319         memset(k, 0, sizeof(*k));
 320         k->idx = -1;
 321
 322         if (info->attrs[NL80211_ATTR_KEY])
 323                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 324         else
 325                 err = nl80211_parse_key_old(info, k);
 326
 327         if (err)
 328                 return err;
 329
 330         if (k->def && k->defmgmt)
 331                 return -EINVAL;
 332
 333         if (k->idx != -1) {
 334                 if (k->defmgmt) {
 335                         if (k->idx < 4 || k->idx > 5)
 336                                 return -EINVAL;
 337                 } else if (k->def) {
 338                         if (k->idx < 0 || k->idx > 3)
 339                                 return -EINVAL;
 340                 } else {
 341                         if (k->idx < 0 || k->idx > 5)
 342                                 return -EINVAL;
 343                 }
 344         }
 345
 346         return 0;
 347 }
 348
 349 static struct cfg80211_cached_keys *
 350 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 351                        struct nlattr *keys)
 352 {
 353         struct key_parse parse;
 354         struct nlattr *key;
 355         struct cfg80211_cached_keys *result;
 356         int rem, err, def = 0;
 357
 358         result = kzalloc(sizeof(*result), GFP_KERNEL);
 359         if (!result)
 360                 return ERR_PTR(-ENOMEM);
 361
 362         result->def = -1;
 363         result->defmgmt = -1;
 364
 365         nla_for_each_nested(key, keys, rem) {
 366                 memset(&parse, 0, sizeof(parse));
 367                 parse.idx = -1;
 368
 369                 err = nl80211_parse_key_new(key, &parse);
 370                 if (err)
 371                         goto error;
 372                 err = -EINVAL;
 373                 if (!parse.p.key)
 374                         goto error;
 375                 if (parse.idx < 0 || parse.idx > 4)
 376                         goto error;
 377                 if (parse.def) {
 378                         if (def)
 379                                 goto error;
 380                         def = 1;
 381                         result->def = parse.idx;
 382                 } else if (parse.defmgmt)
 383                         goto error;
 384                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 385                                                      parse.idx, NULL);
 386                 if (err)
 387                         goto error;
 388                 result->params[parse.idx].cipher = parse.p.cipher;
 389                 result->params[parse.idx].key_len = parse.p.key_len;
 390                 result->params[parse.idx].key = result->data[parse.idx];
 391                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 392         }
 393
 394         return result;
 395  error:
 396         kfree(result);
 397         return ERR_PTR(err);
 398 }
 399
 400 static int nl80211_key_allowed(struct wireless_dev *wdev)
 401 {
 402         ASSERT_WDEV_LOCK(wdev);
 403
 404         if (!netif_running(wdev->netdev))
 405                 return -ENETDOWN;
 406
 407         switch (wdev->iftype) {
 408         case NL80211_IFTYPE_AP:
 409         case NL80211_IFTYPE_AP_VLAN:
 410                 break;
 411         case NL80211_IFTYPE_ADHOC:
 412                 if (!wdev->current_bss)
 413                         return -ENOLINK;
 414                 break;
 415         case NL80211_IFTYPE_STATION:
 416                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 417                         return -ENOLINK;
 418                 break;
 419         default:
 420                 return -EINVAL;
 421         }
 422
 423         return 0;
 424 }
 425
 426 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 427                               struct cfg80211_registered_device *dev)
 428 {
 429         void *hdr;
 430         struct nlattr *nl_bands, *nl_band;
 431         struct nlattr *nl_freqs, *nl_freq;
 432         struct nlattr *nl_rates, *nl_rate;
 433         struct nlattr *nl_modes;
 434         struct nlattr *nl_cmds;
 435         enum ieee80211_band band;
 436         struct ieee80211_channel *chan;
 437         struct ieee80211_rate *rate;
 438         int i;
 439         u16 ifmodes = dev->wiphy.interface_modes;
 440
 441         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 442         if (!hdr)
 443                 return -1;
 444
 445         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 446         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 447
 448         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 449                     cfg80211_rdev_list_generation);
 450
 451         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 452                    dev->wiphy.retry_short);
 453         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 454                    dev->wiphy.retry_long);
 455         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 456                     dev->wiphy.frag_threshold);
 457         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 458                     dev->wiphy.rts_threshold);
 459         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 460                     dev->wiphy.coverage_class);
 461
 462         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 463                    dev->wiphy.max_scan_ssids);
 464         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 465                     dev->wiphy.max_scan_ie_len);
 466
 467         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 468                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 469                 dev->wiphy.cipher_suites);
 470
 471         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 472                    dev->wiphy.max_num_pmkids);
 473
 474         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 475         if (!nl_modes)
 476                 goto nla_put_failure;
 477
 478         i = 0;
 479         while (ifmodes) {
 480                 if (ifmodes & 1)
 481                         NLA_PUT_FLAG(msg, i);
 482                 ifmodes >>= 1;
 483                 i++;
 484         }
 485
 486         nla_nest_end(msg, nl_modes);
 487
 488         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 489         if (!nl_bands)
 490                 goto nla_put_failure;
 491
 492         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 493                 if (!dev->wiphy.bands[band])
 494                         continue;
 495
 496                 nl_band = nla_nest_start(msg, band);
 497                 if (!nl_band)
 498                         goto nla_put_failure;
 499
 500                 /* add HT info */
 501                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 502                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 503                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 504                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 505                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 506                                 dev->wiphy.bands[band]->ht_cap.cap);
 507                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 508                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 509                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 510                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 511                 }
 512
 513                 /* add frequencies */
 514                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 515                 if (!nl_freqs)
 516                         goto nla_put_failure;
 517
 518                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 519                         nl_freq = nla_nest_start(msg, i);
 520                         if (!nl_freq)
 521                                 goto nla_put_failure;
 522
 523                         chan = &dev->wiphy.bands[band]->channels[i];
 524
 525                         if (nl80211_msg_put_channel(msg, chan))
 526                                 goto nla_put_failure;
 527
 528                         nla_nest_end(msg, nl_freq);
 529                 }
 530
 531                 nla_nest_end(msg, nl_freqs);
 532
 533                 /* add bitrates */
 534                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 535                 if (!nl_rates)
 536                         goto nla_put_failure;
 537
 538                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 539                         nl_rate = nla_nest_start(msg, i);
 540                         if (!nl_rate)
 541                                 goto nla_put_failure;
 542
 543                         rate = &dev->wiphy.bands[band]->bitrates[i];
 544                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 545                                     rate->bitrate);
 546                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 547                                 NLA_PUT_FLAG(msg,
 548                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 549
 550                         nla_nest_end(msg, nl_rate);
 551                 }
 552
 553                 nla_nest_end(msg, nl_rates);
 554
 555                 nla_nest_end(msg, nl_band);
 556         }
 557         nla_nest_end(msg, nl_bands);
 558
 559         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 560         if (!nl_cmds)
 561                 goto nla_put_failure;
 562
 563         i = 0;
 564 #define CMD(op, n)                                              \
 565          do {                                                   \
 566                 if (dev->ops->op) {                             \
 567                         i++;                                    \
 568                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 569                 }                                               \
 570         } while (0)
 571
 572         CMD(add_virtual_intf, NEW_INTERFACE);
 573         CMD(change_virtual_intf, SET_INTERFACE);
 574         CMD(add_key, NEW_KEY);
 575         CMD(add_beacon, NEW_BEACON);
 576         CMD(add_station, NEW_STATION);
 577         CMD(add_mpath, NEW_MPATH);
 578         CMD(set_mesh_params, SET_MESH_PARAMS);
 579         CMD(change_bss, SET_BSS);
 580         CMD(auth, AUTHENTICATE);
 581         CMD(assoc, ASSOCIATE);
 582         CMD(deauth, DEAUTHENTICATE);
 583         CMD(disassoc, DISASSOCIATE);
 584         CMD(join_ibss, JOIN_IBSS);
 585         CMD(set_pmksa, SET_PMKSA);
 586         CMD(del_pmksa, DEL_PMKSA);
 587         CMD(flush_pmksa, FLUSH_PMKSA);
 588         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 589         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 590         CMD(action, ACTION);
 591         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 592                 i++;
 593                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 594         }
 595         CMD(set_channel, SET_CHANNEL);
 596
 597 #undef CMD
 598
 599         if (dev->ops->connect || dev->ops->auth) {
 600                 i++;
 601                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 602         }
 603
 604         if (dev->ops->disconnect || dev->ops->deauth) {
 605                 i++;
 606                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 607         }
 608
 609         nla_nest_end(msg, nl_cmds);
 610
 611         return genlmsg_end(msg, hdr);
 612
 613  nla_put_failure:
 614         genlmsg_cancel(msg, hdr);
 615         return -EMSGSIZE;
 616 }
 617
 618 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 619 {
 620         int idx = 0;
 621         int start = cb->args[0];
 622         struct cfg80211_registered_device *dev;
 623
 624         mutex_lock(&cfg80211_mutex);
 625         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 626                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 627                         continue;
 628                 if (++idx <= start)
 629                         continue;
 630                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 631                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 632                                        dev) < 0) {
 633                         idx--;
 634                         break;
 635                 }
 636         }
 637         mutex_unlock(&cfg80211_mutex);
 638
 639         cb->args[0] = idx;
 640
 641         return skb->len;
 642 }
 643
 644 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 645 {
 646         struct sk_buff *msg;
 647         struct cfg80211_registered_device *dev;
 648
 649         dev = cfg80211_get_dev_from_info(info);
 650         if (IS_ERR(dev))
 651                 return PTR_ERR(dev);
 652
 653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 654         if (!msg)
 655                 goto out_err;
 656
 657         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 658                 goto out_free;
 659
 660         cfg80211_unlock_rdev(dev);
 661
 662         return genlmsg_reply(msg, info);
 663
 664  out_free:
 665         nlmsg_free(msg);
 666  out_err:
 667         cfg80211_unlock_rdev(dev);
 668         return -ENOBUFS;
 669 }
 670
 671 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 672         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 673         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 674         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 675         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 676         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 677 };
 678
 679 static int parse_txq_params(struct nlattr *tb[],
 680                             struct ieee80211_txq_params *txq_params)
 681 {
 682         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 683             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 684             !tb[NL80211_TXQ_ATTR_AIFS])
 685                 return -EINVAL;
 686
 687         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 688         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 689         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 690         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 691         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 692
 693         return 0;
 694 }
 695
 696 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 697 {
 698         /*
 699          * You can only set the channel explicitly for AP, mesh
 700          * and WDS type interfaces; all others have their channel
 701          * managed via their respective "establish a connection"
 702          * command (connect, join, ...)
 703          *
 704          * Monitors are special as they are normally slaved to
 705          * whatever else is going on, so they behave as though
 706          * you tried setting the wiphy channel itself.
 707          */
 708         return !wdev ||
 709                 wdev->iftype == NL80211_IFTYPE_AP ||
 710                 wdev->iftype == NL80211_IFTYPE_WDS ||
 711                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 712                 wdev->iftype == NL80211_IFTYPE_MONITOR;
 713 }
 714
 715 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 716                                  struct wireless_dev *wdev,
 717                                  struct genl_info *info)
 718 {
 719         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 720         u32 freq;
 721         int result;
 722
 723         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 724                 return -EINVAL;
 725
 726         if (!nl80211_can_set_dev_channel(wdev))
 727                 return -EOPNOTSUPP;
 728
 729         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 730                 channel_type = nla_get_u32(info->attrs[
 731                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 732                 if (channel_type != NL80211_CHAN_NO_HT &&
 733                     channel_type != NL80211_CHAN_HT20 &&
 734                     channel_type != NL80211_CHAN_HT40PLUS &&
 735                     channel_type != NL80211_CHAN_HT40MINUS)
 736                         return -EINVAL;
 737         }
 738
 739         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 740
 741         mutex_lock(&rdev->devlist_mtx);
 742         if (wdev) {
 743                 wdev_lock(wdev);
 744                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 745                 wdev_unlock(wdev);
 746         } else {
 747                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 748         }
 749         mutex_unlock(&rdev->devlist_mtx);
 750
 751         return result;
 752 }
 753
 754 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 755 {
 756         struct cfg80211_registered_device *rdev;
 757         struct net_device *netdev;
 758         int result;
 759
 760         rtnl_lock();
 761
 762         result = get_rdev_dev_by_info_ifindex(info, &rdev, &netdev);
 763         if (result)
 764                 goto unlock_rtnl;
 765
 766         result = __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 767
 768         dev_put(netdev);
 769         cfg80211_unlock_rdev(rdev);
 770  unlock_rtnl:
 771         rtnl_unlock();
 772
 773         return result;
 774 }
 775
 776 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 777 {
 778         struct cfg80211_registered_device *rdev;
 779         struct net_device *netdev = NULL;
 780         struct wireless_dev *wdev;
 781         int result, rem_txq_params = 0;
 782         struct nlattr *nl_txq_params;
 783         u32 changed;
 784         u8 retry_short = 0, retry_long = 0;
 785         u32 frag_threshold = 0, rts_threshold = 0;
 786         u8 coverage_class = 0;
 787
 788         rtnl_lock();
 789
 790         /*
 791          * Try to find the wiphy and netdev. Normally this
 792          * function shouldn't need the netdev, but this is
 793          * done for backward compatibility -- previously
 794          * setting the channel was done per wiphy, but now
 795          * it is per netdev. Previous userland like hostapd
 796          * also passed a netdev to set_wiphy, so that it is
 797          * possible to let that go to the right netdev!
 798          */
 799         mutex_lock(&cfg80211_mutex);
 800
 801         if (info->attrs[NL80211_ATTR_IFINDEX]) {
 802                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
 803
 804                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
 805                 if (netdev && netdev->ieee80211_ptr) {
 806                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
 807                         mutex_lock(&rdev->mtx);
 808                 } else
 809                         netdev = NULL;
 810         }
 811
 812         if (!netdev) {
 813                 rdev = __cfg80211_rdev_from_info(info);
 814                 if (IS_ERR(rdev)) {
 815                         mutex_unlock(&cfg80211_mutex);
 816                         result = PTR_ERR(rdev);
 817                         goto unlock;
 818                 }
 819                 wdev = NULL;
 820                 netdev = NULL;
 821                 result = 0;
 822
 823                 mutex_lock(&rdev->mtx);
 824         } else if (netif_running(netdev) &&
 825                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
 826                 wdev = netdev->ieee80211_ptr;
 827         else
 828                 wdev = NULL;
 829
 830         /*
 831          * end workaround code, by now the rdev is available
 832          * and locked, and wdev may or may not be NULL.
 833          */
 834
 835         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 836                 result = cfg80211_dev_rename(
 837                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 838
 839         mutex_unlock(&cfg80211_mutex);
 840
 841         if (result)
 842                 goto bad_res;
 843
 844         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 845                 struct ieee80211_txq_params txq_params;
 846                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 847
 848                 if (!rdev->ops->set_txq_params) {
 849                         result = -EOPNOTSUPP;
 850                         goto bad_res;
 851                 }
 852
 853                 nla_for_each_nested(nl_txq_params,
 854                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 855                                     rem_txq_params) {
 856                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 857                                   nla_data(nl_txq_params),
 858                                   nla_len(nl_txq_params),
 859                                   txq_params_policy);
 860                         result = parse_txq_params(tb, &txq_params);
 861                         if (result)
 862                                 goto bad_res;
 863
 864                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 865                                                            &txq_params);
 866                         if (result)
 867                                 goto bad_res;
 868                 }
 869         }
 870
 871         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 872                 result = __nl80211_set_channel(rdev, wdev, info);
 873                 if (result)
 874                         goto bad_res;
 875         }
 876
 877         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
 878                 enum nl80211_tx_power_setting type;
 879                 int idx, mbm = 0;
 880
 881                 if (!rdev->ops->set_tx_power) {
 882                         result = -EOPNOTSUPP;
 883                         goto bad_res;
 884                 }
 885
 886                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
 887                 type = nla_get_u32(info->attrs[idx]);
 888
 889                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
 890                     (type != NL80211_TX_POWER_AUTOMATIC)) {
 891                         result = -EINVAL;
 892                         goto bad_res;
 893                 }
 894
 895                 if (type != NL80211_TX_POWER_AUTOMATIC) {
 896                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
 897                         mbm = nla_get_u32(info->attrs[idx]);
 898                 }
 899
 900                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
 901                 if (result)
 902                         goto bad_res;
 903         }
 904
 905         changed = 0;
 906
 907         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 908                 retry_short = nla_get_u8(
 909                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 910                 if (retry_short == 0) {
 911                         result = -EINVAL;
 912                         goto bad_res;
 913                 }
 914                 changed |= WIPHY_PARAM_RETRY_SHORT;
 915         }
 916
 917         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 918                 retry_long = nla_get_u8(
 919                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 920                 if (retry_long == 0) {
 921                         result = -EINVAL;
 922                         goto bad_res;
 923                 }
 924                 changed |= WIPHY_PARAM_RETRY_LONG;
 925         }
 926
 927         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 928                 frag_threshold = nla_get_u32(
 929                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 930                 if (frag_threshold < 256) {
 931                         result = -EINVAL;
 932                         goto bad_res;
 933                 }
 934                 if (frag_threshold != (u32) -1) {
 935                         /*
 936                          * Fragments (apart from the last one) are required to
 937                          * have even length. Make the fragmentation code
 938                          * simpler by stripping LSB should someone try to use
 939                          * odd threshold value.
 940                          */
 941                         frag_threshold &= ~0x1;
 942                 }
 943                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 944         }
 945
 946         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 947                 rts_threshold = nla_get_u32(
 948                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 949                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 950         }
 951
 952         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 953                 coverage_class = nla_get_u8(
 954                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 955                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
 956         }
 957
 958         if (changed) {
 959                 u8 old_retry_short, old_retry_long;
 960                 u32 old_frag_threshold, old_rts_threshold;
 961                 u8 old_coverage_class;
 962
 963                 if (!rdev->ops->set_wiphy_params) {
 964                         result = -EOPNOTSUPP;
 965                         goto bad_res;
 966                 }
 967
 968                 old_retry_short = rdev->wiphy.retry_short;
 969                 old_retry_long = rdev->wiphy.retry_long;
 970                 old_frag_threshold = rdev->wiphy.frag_threshold;
 971                 old_rts_threshold = rdev->wiphy.rts_threshold;
 972                 old_coverage_class = rdev->wiphy.coverage_class;
 973
 974                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 975                         rdev->wiphy.retry_short = retry_short;
 976                 if (changed & WIPHY_PARAM_RETRY_LONG)
 977                         rdev->wiphy.retry_long = retry_long;
 978                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 979                         rdev->wiphy.frag_threshold = frag_threshold;
 980                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 981                         rdev->wiphy.rts_threshold = rts_threshold;
 982                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
 983                         rdev->wiphy.coverage_class = coverage_class;
 984
 985                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 986                 if (result) {
 987                         rdev->wiphy.retry_short = old_retry_short;
 988                         rdev->wiphy.retry_long = old_retry_long;
 989                         rdev->wiphy.frag_threshold = old_frag_threshold;
 990                         rdev->wiphy.rts_threshold = old_rts_threshold;
 991                         rdev->wiphy.coverage_class = old_coverage_class;
 992                 }
 993         }
 994
 995  bad_res:
 996         mutex_unlock(&rdev->mtx);
 997         if (netdev)
 998                 dev_put(netdev);
 999  unlock:
1000         rtnl_unlock();
1001         return result;
1002 }
1003
1004
1005 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1006                               struct cfg80211_registered_device *rdev,
1007                               struct net_device *dev)
1008 {
1009         void *hdr;
1010
1011         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1012         if (!hdr)
1013                 return -1;
1014
1015         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1016         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1017         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1018         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1019
1020         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1021                     rdev->devlist_generation ^
1022                         (cfg80211_rdev_list_generation << 2));
1023
1024         return genlmsg_end(msg, hdr);
1025
1026  nla_put_failure:
1027         genlmsg_cancel(msg, hdr);
1028         return -EMSGSIZE;
1029 }
1030
1031 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1032 {
1033         int wp_idx = 0;
1034         int if_idx = 0;
1035         int wp_start = cb->args[0];
1036         int if_start = cb->args[1];
1037         struct cfg80211_registered_device *rdev;
1038         struct wireless_dev *wdev;
1039
1040         mutex_lock(&cfg80211_mutex);
1041         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1042                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1043                         continue;
1044                 if (wp_idx < wp_start) {
1045                         wp_idx++;
1046                         continue;
1047                 }
1048                 if_idx = 0;
1049
1050                 mutex_lock(&rdev->devlist_mtx);
1051                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1052                         if (if_idx < if_start) {
1053                                 if_idx++;
1054                                 continue;
1055                         }
1056                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1057                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1058                                                rdev, wdev->netdev) < 0) {
1059                                 mutex_unlock(&rdev->devlist_mtx);
1060                                 goto out;
1061                         }
1062                         if_idx++;
1063                 }
1064                 mutex_unlock(&rdev->devlist_mtx);
1065
1066                 wp_idx++;
1067         }
1068  out:
1069         mutex_unlock(&cfg80211_mutex);
1070
1071         cb->args[0] = wp_idx;
1072         cb->args[1] = if_idx;
1073
1074         return skb->len;
1075 }
1076
1077 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1078 {
1079         struct sk_buff *msg;
1080         struct cfg80211_registered_device *dev;
1081         struct net_device *netdev;
1082         int err;
1083
1084         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
1085         if (err)
1086                 return err;
1087
1088         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1089         if (!msg)
1090                 goto out_err;
1091
1092         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1093                                dev, netdev) < 0)
1094                 goto out_free;
1095
1096         dev_put(netdev);
1097         cfg80211_unlock_rdev(dev);
1098
1099         return genlmsg_reply(msg, info);
1100
1101  out_free:
1102         nlmsg_free(msg);
1103  out_err:
1104         dev_put(netdev);
1105         cfg80211_unlock_rdev(dev);
1106         return -ENOBUFS;
1107 }
1108
1109 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1110         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1111         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1112         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1113         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1114         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1115 };
1116
1117 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1118 {
1119         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1120         int flag;
1121
1122         *mntrflags = 0;
1123
1124         if (!nla)
1125                 return -EINVAL;
1126
1127         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1128                              nla, mntr_flags_policy))
1129                 return -EINVAL;
1130
1131         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1132                 if (flags[flag])
1133                         *mntrflags |= (1<<flag);
1134
1135         return 0;
1136 }
1137
1138 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1139                                struct net_device *netdev, u8 use_4addr,
1140                                enum nl80211_iftype iftype)
1141 {
1142         if (!use_4addr) {
1143                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1144                         return -EBUSY;
1145                 return 0;
1146         }
1147
1148         switch (iftype) {
1149         case NL80211_IFTYPE_AP_VLAN:
1150                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1151                         return 0;
1152                 break;
1153         case NL80211_IFTYPE_STATION:
1154                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1155                         return 0;
1156                 break;
1157         default:
1158                 break;
1159         }
1160
1161         return -EOPNOTSUPP;
1162 }
1163
1164 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1165 {
1166         struct cfg80211_registered_device *rdev;
1167         struct vif_params params;
1168         int err;
1169         enum nl80211_iftype otype, ntype;
1170         struct net_device *dev;
1171         u32 _flags, *flags = NULL;
1172         bool change = false;
1173
1174         memset(&params, 0, sizeof(params));
1175
1176         rtnl_lock();
1177
1178         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1179         if (err)
1180                 goto unlock_rtnl;
1181
1182         otype = ntype = dev->ieee80211_ptr->iftype;
1183
1184         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1185                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1186                 if (otype != ntype)
1187                         change = true;
1188                 if (ntype > NL80211_IFTYPE_MAX) {
1189                         err = -EINVAL;
1190                         goto unlock;
1191                 }
1192         }
1193
1194         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1195                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1196                         err = -EINVAL;
1197                         goto unlock;
1198                 }
1199                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1200                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1201                 change = true;
1202         }
1203
1204         if (info->attrs[NL80211_ATTR_4ADDR]) {
1205                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1206                 change = true;
1207                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1208                 if (err)
1209                         goto unlock;
1210         } else {
1211                 params.use_4addr = -1;
1212         }
1213
1214         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1215                 if (ntype != NL80211_IFTYPE_MONITOR) {
1216                         err = -EINVAL;
1217                         goto unlock;
1218                 }
1219                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1220                                           &_flags);
1221                 if (err)
1222                         goto unlock;
1223
1224                 flags = &_flags;
1225                 change = true;
1226         }
1227
1228         if (change)
1229                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1230         else
1231                 err = 0;
1232
1233         if (!err && params.use_4addr != -1)
1234                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1235
1236  unlock:
1237         dev_put(dev);
1238         cfg80211_unlock_rdev(rdev);
1239  unlock_rtnl:
1240         rtnl_unlock();
1241         return err;
1242 }
1243
1244 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1245 {
1246         struct cfg80211_registered_device *rdev;
1247         struct vif_params params;
1248         int err;
1249         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1250         u32 flags;
1251
1252         memset(&params, 0, sizeof(params));
1253
1254         if (!info->attrs[NL80211_ATTR_IFNAME])
1255                 return -EINVAL;
1256
1257         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1258                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1259                 if (type > NL80211_IFTYPE_MAX)
1260                         return -EINVAL;
1261         }
1262
1263         rtnl_lock();
1264
1265         rdev = cfg80211_get_dev_from_info(info);
1266         if (IS_ERR(rdev)) {
1267                 err = PTR_ERR(rdev);
1268                 goto unlock_rtnl;
1269         }
1270
1271         if (!rdev->ops->add_virtual_intf ||
1272             !(rdev->wiphy.interface_modes & (1 << type))) {
1273                 err = -EOPNOTSUPP;
1274                 goto unlock;
1275         }
1276
1277         if (type == NL80211_IFTYPE_MESH_POINT &&
1278             info->attrs[NL80211_ATTR_MESH_ID]) {
1279                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1280                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1281         }
1282
1283         if (info->attrs[NL80211_ATTR_4ADDR]) {
1284                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1285                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1286                 if (err)
1287                         goto unlock;
1288         }
1289
1290         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1291                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1292                                   &flags);
1293         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1294                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1295                 type, err ? NULL : &flags, &params);
1296
1297  unlock:
1298         cfg80211_unlock_rdev(rdev);
1299  unlock_rtnl:
1300         rtnl_unlock();
1301         return err;
1302 }
1303
1304 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1305 {
1306         struct cfg80211_registered_device *rdev;
1307         int err;
1308         struct net_device *dev;
1309
1310         rtnl_lock();
1311
1312         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1313         if (err)
1314                 goto unlock_rtnl;
1315
1316         if (!rdev->ops->del_virtual_intf) {
1317                 err = -EOPNOTSUPP;
1318                 goto out;
1319         }
1320
1321         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1322
1323  out:
1324         cfg80211_unlock_rdev(rdev);
1325         dev_put(dev);
1326  unlock_rtnl:
1327         rtnl_unlock();
1328         return err;
1329 }
1330
1331 struct get_key_cookie {
1332         struct sk_buff *msg;
1333         int error;
1334         int idx;
1335 };
1336
1337 static void get_key_callback(void *c, struct key_params *params)
1338 {
1339         struct nlattr *key;
1340         struct get_key_cookie *cookie = c;
1341
1342         if (params->key)
1343                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1344                         params->key_len, params->key);
1345
1346         if (params->seq)
1347                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1348                         params->seq_len, params->seq);
1349
1350         if (params->cipher)
1351                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1352                             params->cipher);
1353
1354         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1355         if (!key)
1356                 goto nla_put_failure;
1357
1358         if (params->key)
1359                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1360                         params->key_len, params->key);
1361
1362         if (params->seq)
1363                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1364                         params->seq_len, params->seq);
1365
1366         if (params->cipher)
1367                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1368                             params->cipher);
1369
1370         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1371
1372         nla_nest_end(cookie->msg, key);
1373
1374         return;
1375  nla_put_failure:
1376         cookie->error = 1;
1377 }
1378
1379 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1380 {
1381         struct cfg80211_registered_device *rdev;
1382         int err;
1383         struct net_device *dev;
1384         u8 key_idx = 0;
1385         u8 *mac_addr = NULL;
1386         struct get_key_cookie cookie = {
1387                 .error = 0,
1388         };
1389         void *hdr;
1390         struct sk_buff *msg;
1391
1392         if (info->attrs[NL80211_ATTR_KEY_IDX])
1393                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1394
1395         if (key_idx > 5)
1396                 return -EINVAL;
1397
1398         if (info->attrs[NL80211_ATTR_MAC])
1399                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1400
1401         rtnl_lock();
1402
1403         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1404         if (err)
1405                 goto unlock_rtnl;
1406
1407         if (!rdev->ops->get_key) {
1408                 err = -EOPNOTSUPP;
1409                 goto out;
1410         }
1411
1412         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1413         if (!msg) {
1414                 err = -ENOMEM;
1415                 goto out;
1416         }
1417
1418         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1419                              NL80211_CMD_NEW_KEY);
1420
1421         if (IS_ERR(hdr)) {
1422                 err = PTR_ERR(hdr);
1423                 goto free_msg;
1424         }
1425
1426         cookie.msg = msg;
1427         cookie.idx = key_idx;
1428
1429         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1430         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1431         if (mac_addr)
1432                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1433
1434         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1435                                 &cookie, get_key_callback);
1436
1437         if (err)
1438                 goto free_msg;
1439
1440         if (cookie.error)
1441                 goto nla_put_failure;
1442
1443         genlmsg_end(msg, hdr);
1444         err = genlmsg_reply(msg, info);
1445         goto out;
1446
1447  nla_put_failure:
1448         err = -ENOBUFS;
1449  free_msg:
1450         nlmsg_free(msg);
1451  out:
1452         cfg80211_unlock_rdev(rdev);
1453         dev_put(dev);
1454  unlock_rtnl:
1455         rtnl_unlock();
1456
1457         return err;
1458 }
1459
1460 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1461 {
1462         struct cfg80211_registered_device *rdev;
1463         struct key_parse key;
1464         int err;
1465         struct net_device *dev;
1466         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1467                     u8 key_index);
1468
1469         err = nl80211_parse_key(info, &key);
1470         if (err)
1471                 return err;
1472
1473         if (key.idx < 0)
1474                 return -EINVAL;
1475
1476         /* only support setting default key */
1477         if (!key.def && !key.defmgmt)
1478                 return -EINVAL;
1479
1480         rtnl_lock();
1481
1482         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1483         if (err)
1484                 goto unlock_rtnl;
1485
1486         if (key.def)
1487                 func = rdev->ops->set_default_key;
1488         else
1489                 func = rdev->ops->set_default_mgmt_key;
1490
1491         if (!func) {
1492                 err = -EOPNOTSUPP;
1493                 goto out;
1494         }
1495
1496         wdev_lock(dev->ieee80211_ptr);
1497         err = nl80211_key_allowed(dev->ieee80211_ptr);
1498         if (!err)
1499                 err = func(&rdev->wiphy, dev, key.idx);
1500
1501 #ifdef CONFIG_CFG80211_WEXT
1502         if (!err) {
1503                 if (func == rdev->ops->set_default_key)
1504                         dev->ieee80211_ptr->wext.default_key = key.idx;
1505                 else
1506                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1507         }
1508 #endif
1509         wdev_unlock(dev->ieee80211_ptr);
1510
1511  out:
1512         cfg80211_unlock_rdev(rdev);
1513         dev_put(dev);
1514
1515  unlock_rtnl:
1516         rtnl_unlock();
1517
1518         return err;
1519 }
1520
1521 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1522 {
1523         struct cfg80211_registered_device *rdev;
1524         int err;
1525         struct net_device *dev;
1526         struct key_parse key;
1527         u8 *mac_addr = NULL;
1528
1529         err = nl80211_parse_key(info, &key);
1530         if (err)
1531                 return err;
1532
1533         if (!key.p.key)
1534                 return -EINVAL;
1535
1536         if (info->attrs[NL80211_ATTR_MAC])
1537                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1538
1539         rtnl_lock();
1540
1541         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1542         if (err)
1543                 goto unlock_rtnl;
1544
1545         if (!rdev->ops->add_key) {
1546                 err = -EOPNOTSUPP;
1547                 goto out;
1548         }
1549
1550         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1551                 err = -EINVAL;
1552                 goto out;
1553         }
1554
1555         wdev_lock(dev->ieee80211_ptr);
1556         err = nl80211_key_allowed(dev->ieee80211_ptr);
1557         if (!err)
1558                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1559                                          mac_addr, &key.p);
1560         wdev_unlock(dev->ieee80211_ptr);
1561
1562  out:
1563         cfg80211_unlock_rdev(rdev);
1564         dev_put(dev);
1565  unlock_rtnl:
1566         rtnl_unlock();
1567
1568         return err;
1569 }
1570
1571 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1572 {
1573         struct cfg80211_registered_device *rdev;
1574         int err;
1575         struct net_device *dev;
1576         u8 *mac_addr = NULL;
1577         struct key_parse key;
1578
1579         err = nl80211_parse_key(info, &key);
1580         if (err)
1581                 return err;
1582
1583         if (info->attrs[NL80211_ATTR_MAC])
1584                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1585
1586         rtnl_lock();
1587
1588         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1589         if (err)
1590                 goto unlock_rtnl;
1591
1592         if (!rdev->ops->del_key) {
1593                 err = -EOPNOTSUPP;
1594                 goto out;
1595         }
1596
1597         wdev_lock(dev->ieee80211_ptr);
1598         err = nl80211_key_allowed(dev->ieee80211_ptr);
1599         if (!err)
1600                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1601
1602 #ifdef CONFIG_CFG80211_WEXT
1603         if (!err) {
1604                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1605                         dev->ieee80211_ptr->wext.default_key = -1;
1606                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1607                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1608         }
1609 #endif
1610         wdev_unlock(dev->ieee80211_ptr);
1611
1612  out:
1613         cfg80211_unlock_rdev(rdev);
1614         dev_put(dev);
1615
1616  unlock_rtnl:
1617         rtnl_unlock();
1618
1619         return err;
1620 }
1621
1622 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1623 {
1624         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1625                     struct beacon_parameters *info);
1626         struct cfg80211_registered_device *rdev;
1627         int err;
1628         struct net_device *dev;
1629         struct beacon_parameters params;
1630         int haveinfo = 0;
1631
1632         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1633                 return -EINVAL;
1634
1635         rtnl_lock();
1636
1637         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1638         if (err)
1639                 goto unlock_rtnl;
1640
1641         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1642                 err = -EOPNOTSUPP;
1643                 goto out;
1644         }
1645
1646         switch (info->genlhdr->cmd) {
1647         case NL80211_CMD_NEW_BEACON:
1648                 /* these are required for NEW_BEACON */
1649                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1650                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1651                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1652                         err = -EINVAL;
1653                         goto out;
1654                 }
1655
1656                 call = rdev->ops->add_beacon;
1657                 break;
1658         case NL80211_CMD_SET_BEACON:
1659                 call = rdev->ops->set_beacon;
1660                 break;
1661         default:
1662                 WARN_ON(1);
1663                 err = -EOPNOTSUPP;
1664                 goto out;
1665         }
1666
1667         if (!call) {
1668                 err = -EOPNOTSUPP;
1669                 goto out;
1670         }
1671
1672         memset(&params, 0, sizeof(params));
1673
1674         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1675                 params.interval =
1676                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1677                 haveinfo = 1;
1678         }
1679
1680         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1681                 params.dtim_period =
1682                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1683                 haveinfo = 1;
1684         }
1685
1686         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1687                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1688                 params.head_len =
1689                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1690                 haveinfo = 1;
1691         }
1692
1693         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1694                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1695                 params.tail_len =
1696                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1697                 haveinfo = 1;
1698         }
1699
1700         if (!haveinfo) {
1701                 err = -EINVAL;
1702                 goto out;
1703         }
1704
1705         err = call(&rdev->wiphy, dev, &params);
1706
1707  out:
1708         cfg80211_unlock_rdev(rdev);
1709         dev_put(dev);
1710  unlock_rtnl:
1711         rtnl_unlock();
1712
1713         return err;
1714 }
1715
1716 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1717 {
1718         struct cfg80211_registered_device *rdev;
1719         int err;
1720         struct net_device *dev;
1721
1722         rtnl_lock();
1723
1724         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1725         if (err)
1726                 goto unlock_rtnl;
1727
1728         if (!rdev->ops->del_beacon) {
1729                 err = -EOPNOTSUPP;
1730                 goto out;
1731         }
1732
1733         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1734                 err = -EOPNOTSUPP;
1735                 goto out;
1736         }
1737         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1738
1739  out:
1740         cfg80211_unlock_rdev(rdev);
1741         dev_put(dev);
1742  unlock_rtnl:
1743         rtnl_unlock();
1744
1745         return err;
1746 }
1747
1748 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1749         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1750         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1751         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1752         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1753 };
1754
1755 static int parse_station_flags(struct genl_info *info,
1756                                struct station_parameters *params)
1757 {
1758         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1759         struct nlattr *nla;
1760         int flag;
1761
1762         /*
1763          * Try parsing the new attribute first so userspace
1764          * can specify both for older kernels.
1765          */
1766         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1767         if (nla) {
1768                 struct nl80211_sta_flag_update *sta_flags;
1769
1770                 sta_flags = nla_data(nla);
1771                 params->sta_flags_mask = sta_flags->mask;
1772                 params->sta_flags_set = sta_flags->set;
1773                 if ((params->sta_flags_mask |
1774                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1775                         return -EINVAL;
1776                 return 0;
1777         }
1778
1779         /* if present, parse the old attribute */
1780
1781         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1782         if (!nla)
1783                 return 0;
1784
1785         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1786                              nla, sta_flags_policy))
1787                 return -EINVAL;
1788
1789         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1790         params->sta_flags_mask &= ~1;
1791
1792         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1793                 if (flags[flag])
1794                         params->sta_flags_set |= (1<<flag);
1795
1796         return 0;
1797 }
1798
1799 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1800                                 int flags, struct net_device *dev,
1801                                 const u8 *mac_addr, struct station_info *sinfo)
1802 {
1803         void *hdr;
1804         struct nlattr *sinfoattr, *txrate;
1805         u16 bitrate;
1806
1807         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1808         if (!hdr)
1809                 return -1;
1810
1811         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1812         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1813
1814         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1815
1816         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1817         if (!sinfoattr)
1818                 goto nla_put_failure;
1819         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1820                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1821                             sinfo->inactive_time);
1822         if (sinfo->filled & STATION_INFO_RX_BYTES)
1823                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1824                             sinfo->rx_bytes);
1825         if (sinfo->filled & STATION_INFO_TX_BYTES)
1826                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1827                             sinfo->tx_bytes);
1828         if (sinfo->filled & STATION_INFO_LLID)
1829                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1830                             sinfo->llid);
1831         if (sinfo->filled & STATION_INFO_PLID)
1832                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1833                             sinfo->plid);
1834         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1835                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1836                             sinfo->plink_state);
1837         if (sinfo->filled & STATION_INFO_SIGNAL)
1838                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1839                            sinfo->signal);
1840         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1841                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1842                 if (!txrate)
1843                         goto nla_put_failure;
1844
1845                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1846                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1847                 if (bitrate > 0)
1848                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1849
1850                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1851                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1852                                     sinfo->txrate.mcs);
1853                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1854                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1855                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1856                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1857
1858                 nla_nest_end(msg, txrate);
1859         }
1860         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1861                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1862                             sinfo->rx_packets);
1863         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1864                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1865                             sinfo->tx_packets);
1866         nla_nest_end(msg, sinfoattr);
1867
1868         return genlmsg_end(msg, hdr);
1869
1870  nla_put_failure:
1871         genlmsg_cancel(msg, hdr);
1872         return -EMSGSIZE;
1873 }
1874
1875 static int nl80211_dump_station(struct sk_buff *skb,
1876                                 struct netlink_callback *cb)
1877 {
1878         struct station_info sinfo;
1879         struct cfg80211_registered_device *dev;
1880         struct net_device *netdev;
1881         u8 mac_addr[ETH_ALEN];
1882         int ifidx = cb->args[0];
1883         int sta_idx = cb->args[1];
1884         int err;
1885
1886         if (!ifidx)
1887                 ifidx = nl80211_get_ifidx(cb);
1888         if (ifidx < 0)
1889                 return ifidx;
1890
1891         rtnl_lock();
1892
1893         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1894         if (!netdev) {
1895                 err = -ENODEV;
1896                 goto out_rtnl;
1897         }
1898
1899         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1900         if (IS_ERR(dev)) {
1901                 err = PTR_ERR(dev);
1902                 goto out_rtnl;
1903         }
1904
1905         if (!dev->ops->dump_station) {
1906                 err = -EOPNOTSUPP;
1907                 goto out_err;
1908         }
1909
1910         while (1) {
1911                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1912                                              mac_addr, &sinfo);
1913                 if (err == -ENOENT)
1914                         break;
1915                 if (err)
1916                         goto out_err;
1917
1918                 if (nl80211_send_station(skb,
1919                                 NETLINK_CB(cb->skb).pid,
1920                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1921                                 netdev, mac_addr,
1922                                 &sinfo) < 0)
1923                         goto out;
1924
1925                 sta_idx++;
1926         }
1927
1928
1929  out:
1930         cb->args[1] = sta_idx;
1931         err = skb->len;
1932  out_err:
1933         cfg80211_unlock_rdev(dev);
1934  out_rtnl:
1935         rtnl_unlock();
1936
1937         return err;
1938 }
1939
1940 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1941 {
1942         struct cfg80211_registered_device *rdev;
1943         int err;
1944         struct net_device *dev;
1945         struct station_info sinfo;
1946         struct sk_buff *msg;
1947         u8 *mac_addr = NULL;
1948
1949         memset(&sinfo, 0, sizeof(sinfo));
1950
1951         if (!info->attrs[NL80211_ATTR_MAC])
1952                 return -EINVAL;
1953
1954         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1955
1956         rtnl_lock();
1957
1958         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1959         if (err)
1960                 goto out_rtnl;
1961
1962         if (!rdev->ops->get_station) {
1963                 err = -EOPNOTSUPP;
1964                 goto out;
1965         }
1966
1967         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1968         if (err)
1969                 goto out;
1970
1971         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1972         if (!msg)
1973                 goto out;
1974
1975         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1976                                  dev, mac_addr, &sinfo) < 0)
1977                 goto out_free;
1978
1979         err = genlmsg_reply(msg, info);
1980         goto out;
1981
1982  out_free:
1983         nlmsg_free(msg);
1984  out:
1985         cfg80211_unlock_rdev(rdev);
1986         dev_put(dev);
1987  out_rtnl:
1988         rtnl_unlock();
1989
1990         return err;
1991 }
1992
1993 /*
1994  * Get vlan interface making sure it is running and on the right wiphy.
1995  */
1996 static int get_vlan(struct genl_info *info,
1997                     struct cfg80211_registered_device *rdev,
1998                     struct net_device **vlan)
1999 {
2000         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2001         *vlan = NULL;
2002
2003         if (vlanattr) {
2004                 *vlan = dev_get_by_index(genl_info_net(info),
2005                                          nla_get_u32(vlanattr));
2006                 if (!*vlan)
2007                         return -ENODEV;
2008                 if (!(*vlan)->ieee80211_ptr)
2009                         return -EINVAL;
2010                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2011                         return -EINVAL;
2012                 if (!netif_running(*vlan))
2013                         return -ENETDOWN;
2014         }
2015         return 0;
2016 }
2017
2018 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2019 {
2020         struct cfg80211_registered_device *rdev;
2021         int err;
2022         struct net_device *dev;
2023         struct station_parameters params;
2024         u8 *mac_addr = NULL;
2025
2026         memset(&params, 0, sizeof(params));
2027
2028         params.listen_interval = -1;
2029
2030         if (info->attrs[NL80211_ATTR_STA_AID])
2031                 return -EINVAL;
2032
2033         if (!info->attrs[NL80211_ATTR_MAC])
2034                 return -EINVAL;
2035
2036         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2037
2038         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2039                 params.supported_rates =
2040                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2041                 params.supported_rates_len =
2042                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2043         }
2044
2045         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2046                 params.listen_interval =
2047                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2048
2049         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2050                 params.ht_capa =
2051                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2052
2053         if (parse_station_flags(info, &params))
2054                 return -EINVAL;
2055
2056         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2057                 params.plink_action =
2058                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2059
2060         rtnl_lock();
2061
2062         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2063         if (err)
2064                 goto out_rtnl;
2065
2066         err = get_vlan(info, rdev, &params.vlan);
2067         if (err)
2068                 goto out;
2069
2070         /* validate settings */
2071         err = 0;
2072
2073         switch (dev->ieee80211_ptr->iftype) {
2074         case NL80211_IFTYPE_AP:
2075         case NL80211_IFTYPE_AP_VLAN:
2076                 /* disallow mesh-specific things */
2077                 if (params.plink_action)
2078                         err = -EINVAL;
2079                 break;
2080         case NL80211_IFTYPE_STATION:
2081                 /* disallow everything but AUTHORIZED flag */
2082                 if (params.plink_action)
2083                         err = -EINVAL;
2084                 if (params.vlan)
2085                         err = -EINVAL;
2086                 if (params.supported_rates)
2087                         err = -EINVAL;
2088                 if (params.ht_capa)
2089                         err = -EINVAL;
2090                 if (params.listen_interval >= 0)
2091                         err = -EINVAL;
2092                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2093                         err = -EINVAL;
2094                 break;
2095         case NL80211_IFTYPE_MESH_POINT:
2096                 /* disallow things mesh doesn't support */
2097                 if (params.vlan)
2098                         err = -EINVAL;
2099                 if (params.ht_capa)
2100                         err = -EINVAL;
2101                 if (params.listen_interval >= 0)
2102                         err = -EINVAL;
2103                 if (params.supported_rates)
2104                         err = -EINVAL;
2105                 if (params.sta_flags_mask)
2106                         err = -EINVAL;
2107                 break;
2108         default:
2109                 err = -EINVAL;
2110         }
2111
2112         if (err)
2113                 goto out;
2114
2115         if (!rdev->ops->change_station) {
2116                 err = -EOPNOTSUPP;
2117                 goto out;
2118         }
2119
2120         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2121
2122  out:
2123         if (params.vlan)
2124                 dev_put(params.vlan);
2125         cfg80211_unlock_rdev(rdev);
2126         dev_put(dev);
2127  out_rtnl:
2128         rtnl_unlock();
2129
2130         return err;
2131 }
2132
2133 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2134 {
2135         struct cfg80211_registered_device *rdev;
2136         int err;
2137         struct net_device *dev;
2138         struct station_parameters params;
2139         u8 *mac_addr = NULL;
2140
2141         memset(&params, 0, sizeof(params));
2142
2143         if (!info->attrs[NL80211_ATTR_MAC])
2144                 return -EINVAL;
2145
2146         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2147                 return -EINVAL;
2148
2149         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2150                 return -EINVAL;
2151
2152         if (!info->attrs[NL80211_ATTR_STA_AID])
2153                 return -EINVAL;
2154
2155         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2156         params.supported_rates =
2157                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2158         params.supported_rates_len =
2159                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2160         params.listen_interval =
2161                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2162
2163         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2164         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2165                 return -EINVAL;
2166
2167         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2168                 params.ht_capa =
2169                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2170
2171         if (parse_station_flags(info, &params))
2172                 return -EINVAL;
2173
2174         rtnl_lock();
2175
2176         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2177         if (err)
2178                 goto out_rtnl;
2179
2180         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2181             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2182                 err = -EINVAL;
2183                 goto out;
2184         }
2185
2186         err = get_vlan(info, rdev, &params.vlan);
2187         if (err)
2188                 goto out;
2189
2190         /* validate settings */
2191         err = 0;
2192
2193         if (!rdev->ops->add_station) {
2194                 err = -EOPNOTSUPP;
2195                 goto out;
2196         }
2197
2198         if (!netif_running(dev)) {
2199                 err = -ENETDOWN;
2200                 goto out;
2201         }
2202
2203         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2204
2205  out:
2206         if (params.vlan)
2207                 dev_put(params.vlan);
2208         cfg80211_unlock_rdev(rdev);
2209         dev_put(dev);
2210  out_rtnl:
2211         rtnl_unlock();
2212
2213         return err;
2214 }
2215
2216 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2217 {
2218         struct cfg80211_registered_device *rdev;
2219         int err;
2220         struct net_device *dev;
2221         u8 *mac_addr = NULL;
2222
2223         if (info->attrs[NL80211_ATTR_MAC])
2224                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2225
2226         rtnl_lock();
2227
2228         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2229         if (err)
2230                 goto out_rtnl;
2231
2232         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2233             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2234             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2235                 err = -EINVAL;
2236                 goto out;
2237         }
2238
2239         if (!rdev->ops->del_station) {
2240                 err = -EOPNOTSUPP;
2241                 goto out;
2242         }
2243
2244         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2245
2246  out:
2247         cfg80211_unlock_rdev(rdev);
2248         dev_put(dev);
2249  out_rtnl:
2250         rtnl_unlock();
2251
2252         return err;
2253 }
2254
2255 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2256                                 int flags, struct net_device *dev,
2257                                 u8 *dst, u8 *next_hop,
2258                                 struct mpath_info *pinfo)
2259 {
2260         void *hdr;
2261         struct nlattr *pinfoattr;
2262
2263         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2264         if (!hdr)
2265                 return -1;
2266
2267         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2268         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2269         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2270
2271         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2272
2273         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2274         if (!pinfoattr)
2275                 goto nla_put_failure;
2276         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2277                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2278                             pinfo->frame_qlen);
2279         if (pinfo->filled & MPATH_INFO_SN)
2280                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2281                             pinfo->sn);
2282         if (pinfo->filled & MPATH_INFO_METRIC)
2283                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2284                             pinfo->metric);
2285         if (pinfo->filled & MPATH_INFO_EXPTIME)
2286                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2287                             pinfo->exptime);
2288         if (pinfo->filled & MPATH_INFO_FLAGS)
2289                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2290                             pinfo->flags);
2291         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2292                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2293                             pinfo->discovery_timeout);
2294         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2295                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2296                             pinfo->discovery_retries);
2297
2298         nla_nest_end(msg, pinfoattr);
2299
2300         return genlmsg_end(msg, hdr);
2301
2302  nla_put_failure:
2303         genlmsg_cancel(msg, hdr);
2304         return -EMSGSIZE;
2305 }
2306
2307 static int nl80211_dump_mpath(struct sk_buff *skb,
2308                               struct netlink_callback *cb)
2309 {
2310         struct mpath_info pinfo;
2311         struct cfg80211_registered_device *dev;
2312         struct net_device *netdev;
2313         u8 dst[ETH_ALEN];
2314         u8 next_hop[ETH_ALEN];
2315         int ifidx = cb->args[0];
2316         int path_idx = cb->args[1];
2317         int err;
2318
2319         if (!ifidx)
2320                 ifidx = nl80211_get_ifidx(cb);
2321         if (ifidx < 0)
2322                 return ifidx;
2323
2324         rtnl_lock();
2325
2326         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2327         if (!netdev) {
2328                 err = -ENODEV;
2329                 goto out_rtnl;
2330         }
2331
2332         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2333         if (IS_ERR(dev)) {
2334                 err = PTR_ERR(dev);
2335                 goto out_rtnl;
2336         }
2337
2338         if (!dev->ops->dump_mpath) {
2339                 err = -EOPNOTSUPP;
2340                 goto out_err;
2341         }
2342
2343         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2344                 err = -EOPNOTSUPP;
2345                 goto out_err;
2346         }
2347
2348         while (1) {
2349                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2350                                            dst, next_hop, &pinfo);
2351                 if (err == -ENOENT)
2352                         break;
2353                 if (err)
2354                         goto out_err;
2355
2356                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2357                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2358                                        netdev, dst, next_hop,
2359                                        &pinfo) < 0)
2360                         goto out;
2361
2362                 path_idx++;
2363         }
2364
2365
2366  out:
2367         cb->args[1] = path_idx;
2368         err = skb->len;
2369  out_err:
2370         cfg80211_unlock_rdev(dev);
2371  out_rtnl:
2372         rtnl_unlock();
2373
2374         return err;
2375 }
2376
2377 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2378 {
2379         struct cfg80211_registered_device *rdev;
2380         int err;
2381         struct net_device *dev;
2382         struct mpath_info pinfo;
2383         struct sk_buff *msg;
2384         u8 *dst = NULL;
2385         u8 next_hop[ETH_ALEN];
2386
2387         memset(&pinfo, 0, sizeof(pinfo));
2388
2389         if (!info->attrs[NL80211_ATTR_MAC])
2390                 return -EINVAL;
2391
2392         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2393
2394         rtnl_lock();
2395
2396         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2397         if (err)
2398                 goto out_rtnl;
2399
2400         if (!rdev->ops->get_mpath) {
2401                 err = -EOPNOTSUPP;
2402                 goto out;
2403         }
2404
2405         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2406                 err = -EOPNOTSUPP;
2407                 goto out;
2408         }
2409
2410         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2411         if (err)
2412                 goto out;
2413
2414         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2415         if (!msg)
2416                 goto out;
2417
2418         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2419                                  dev, dst, next_hop, &pinfo) < 0)
2420                 goto out_free;
2421
2422         err = genlmsg_reply(msg, info);
2423         goto out;
2424
2425  out_free:
2426         nlmsg_free(msg);
2427  out:
2428         cfg80211_unlock_rdev(rdev);
2429         dev_put(dev);
2430  out_rtnl:
2431         rtnl_unlock();
2432
2433         return err;
2434 }
2435
2436 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2437 {
2438         struct cfg80211_registered_device *rdev;
2439         int err;
2440         struct net_device *dev;
2441         u8 *dst = NULL;
2442         u8 *next_hop = NULL;
2443
2444         if (!info->attrs[NL80211_ATTR_MAC])
2445                 return -EINVAL;
2446
2447         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2448                 return -EINVAL;
2449
2450         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2451         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2452
2453         rtnl_lock();
2454
2455         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2456         if (err)
2457                 goto out_rtnl;
2458
2459         if (!rdev->ops->change_mpath) {
2460                 err = -EOPNOTSUPP;
2461                 goto out;
2462         }
2463
2464         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2465                 err = -EOPNOTSUPP;
2466                 goto out;
2467         }
2468
2469         if (!netif_running(dev)) {
2470                 err = -ENETDOWN;
2471                 goto out;
2472         }
2473
2474         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2475
2476  out:
2477         cfg80211_unlock_rdev(rdev);
2478         dev_put(dev);
2479  out_rtnl:
2480         rtnl_unlock();
2481
2482         return err;
2483 }
2484 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2485 {
2486         struct cfg80211_registered_device *rdev;
2487         int err;
2488         struct net_device *dev;
2489         u8 *dst = NULL;
2490         u8 *next_hop = NULL;
2491
2492         if (!info->attrs[NL80211_ATTR_MAC])
2493                 return -EINVAL;
2494
2495         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2496                 return -EINVAL;
2497
2498         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2499         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2500
2501         rtnl_lock();
2502
2503         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2504         if (err)
2505                 goto out_rtnl;
2506
2507         if (!rdev->ops->add_mpath) {
2508                 err = -EOPNOTSUPP;
2509                 goto out;
2510         }
2511
2512         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2513                 err = -EOPNOTSUPP;
2514                 goto out;
2515         }
2516
2517         if (!netif_running(dev)) {
2518                 err = -ENETDOWN;
2519                 goto out;
2520         }
2521
2522         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2523
2524  out:
2525         cfg80211_unlock_rdev(rdev);
2526         dev_put(dev);
2527  out_rtnl:
2528         rtnl_unlock();
2529
2530         return err;
2531 }
2532
2533 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2534 {
2535         struct cfg80211_registered_device *rdev;
2536         int err;
2537         struct net_device *dev;
2538         u8 *dst = NULL;
2539
2540         if (info->attrs[NL80211_ATTR_MAC])
2541                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2542
2543         rtnl_lock();
2544
2545         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2546         if (err)
2547                 goto out_rtnl;
2548
2549         if (!rdev->ops->del_mpath) {
2550                 err = -EOPNOTSUPP;
2551                 goto out;
2552         }
2553
2554         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2555
2556  out:
2557         cfg80211_unlock_rdev(rdev);
2558         dev_put(dev);
2559  out_rtnl:
2560         rtnl_unlock();
2561
2562         return err;
2563 }
2564
2565 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2566 {
2567         struct cfg80211_registered_device *rdev;
2568         int err;
2569         struct net_device *dev;
2570         struct bss_parameters params;
2571
2572         memset(&params, 0, sizeof(params));
2573         /* default to not changing parameters */
2574         params.use_cts_prot = -1;
2575         params.use_short_preamble = -1;
2576         params.use_short_slot_time = -1;
2577         params.ap_isolate = -1;
2578
2579         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2580                 params.use_cts_prot =
2581                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2582         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2583                 params.use_short_preamble =
2584                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2585         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2586                 params.use_short_slot_time =
2587                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2588         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2589                 params.basic_rates =
2590                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2591                 params.basic_rates_len =
2592                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2593         }
2594         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2595                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2596
2597         rtnl_lock();
2598
2599         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2600         if (err)
2601                 goto out_rtnl;
2602
2603         if (!rdev->ops->change_bss) {
2604                 err = -EOPNOTSUPP;
2605                 goto out;
2606         }
2607
2608         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2609                 err = -EOPNOTSUPP;
2610                 goto out;
2611         }
2612
2613         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2614
2615  out:
2616         cfg80211_unlock_rdev(rdev);
2617         dev_put(dev);
2618  out_rtnl:
2619         rtnl_unlock();
2620
2621         return err;
2622 }
2623
2624 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2625         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2626         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2627         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2628         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2629         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2630         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2631 };
2632
2633 static int parse_reg_rule(struct nlattr *tb[],
2634         struct ieee80211_reg_rule *reg_rule)
2635 {
2636         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2637         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2638
2639         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2640                 return -EINVAL;
2641         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2642                 return -EINVAL;
2643         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2644                 return -EINVAL;
2645         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2646                 return -EINVAL;
2647         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2648                 return -EINVAL;
2649
2650         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2651
2652         freq_range->start_freq_khz =
2653                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2654         freq_range->end_freq_khz =
2655                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2656         freq_range->max_bandwidth_khz =
2657                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2658
2659         power_rule->max_eirp =
2660                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2661
2662         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2663                 power_rule->max_antenna_gain =
2664                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2665
2666         return 0;
2667 }
2668
2669 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2670 {
2671         int r;
2672         char *data = NULL;
2673
2674         /*
2675          * You should only get this when cfg80211 hasn't yet initialized
2676          * completely when built-in to the kernel right between the time
2677          * window between nl80211_init() and regulatory_init(), if that is
2678          * even possible.
2679          */
2680         mutex_lock(&cfg80211_mutex);
2681         if (unlikely(!cfg80211_regdomain)) {
2682                 mutex_unlock(&cfg80211_mutex);
2683                 return -EINPROGRESS;
2684         }
2685         mutex_unlock(&cfg80211_mutex);
2686
2687         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2688                 return -EINVAL;
2689
2690         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2691
2692         r = regulatory_hint_user(data);
2693
2694         return r;
2695 }
2696
2697 static int nl80211_get_mesh_params(struct sk_buff *skb,
2698         struct genl_info *info)
2699 {
2700         struct cfg80211_registered_device *rdev;
2701         struct mesh_config cur_params;
2702         int err;
2703         struct net_device *dev;
2704         void *hdr;
2705         struct nlattr *pinfoattr;
2706         struct sk_buff *msg;
2707
2708         rtnl_lock();
2709
2710         /* Look up our device */
2711         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2712         if (err)
2713                 goto out_rtnl;
2714
2715         if (!rdev->ops->get_mesh_params) {
2716                 err = -EOPNOTSUPP;
2717                 goto out;
2718         }
2719
2720         /* Get the mesh params */
2721         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2722         if (err)
2723                 goto out;
2724
2725         /* Draw up a netlink message to send back */
2726         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2727         if (!msg) {
2728                 err = -ENOBUFS;
2729                 goto out;
2730         }
2731         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2732                              NL80211_CMD_GET_MESH_PARAMS);
2733         if (!hdr)
2734                 goto nla_put_failure;
2735         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2736         if (!pinfoattr)
2737                 goto nla_put_failure;
2738         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2739         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2740                         cur_params.dot11MeshRetryTimeout);
2741         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2742                         cur_params.dot11MeshConfirmTimeout);
2743         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2744                         cur_params.dot11MeshHoldingTimeout);
2745         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2746                         cur_params.dot11MeshMaxPeerLinks);
2747         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2748                         cur_params.dot11MeshMaxRetries);
2749         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2750                         cur_params.dot11MeshTTL);
2751         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2752                         cur_params.auto_open_plinks);
2753         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2754                         cur_params.dot11MeshHWMPmaxPREQretries);
2755         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2756                         cur_params.path_refresh_time);
2757         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2758                         cur_params.min_discovery_timeout);
2759         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2760                         cur_params.dot11MeshHWMPactivePathTimeout);
2761         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2762                         cur_params.dot11MeshHWMPpreqMinInterval);
2763         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2764                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2765         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2766                         cur_params.dot11MeshHWMPRootMode);
2767         nla_nest_end(msg, pinfoattr);
2768         genlmsg_end(msg, hdr);
2769         err = genlmsg_reply(msg, info);
2770         goto out;
2771
2772  nla_put_failure:
2773         genlmsg_cancel(msg, hdr);
2774         nlmsg_free(msg);
2775         err = -EMSGSIZE;
2776  out:
2777         /* Cleanup */
2778         cfg80211_unlock_rdev(rdev);
2779         dev_put(dev);
2780  out_rtnl:
2781         rtnl_unlock();
2782
2783         return err;
2784 }
2785
2786 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2787 do {\
2788         if (table[attr_num]) {\
2789                 cfg.param = nla_fn(table[attr_num]); \
2790                 mask |= (1 << (attr_num - 1)); \
2791         } \
2792 } while (0);\
2793
2794 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2795         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2796         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2797         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2798         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2799         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2800         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2801         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2802
2803         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2804         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2805         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2806         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2807         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2808         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2809 };
2810
2811 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2812 {
2813         int err;
2814         u32 mask;
2815         struct cfg80211_registered_device *rdev;
2816         struct net_device *dev;
2817         struct mesh_config cfg;
2818         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2819         struct nlattr *parent_attr;
2820
2821         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2822         if (!parent_attr)
2823                 return -EINVAL;
2824         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2825                         parent_attr, nl80211_meshconf_params_policy))
2826                 return -EINVAL;
2827
2828         rtnl_lock();
2829
2830         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2831         if (err)
2832                 goto out_rtnl;
2833
2834         if (!rdev->ops->set_mesh_params) {
2835                 err = -EOPNOTSUPP;
2836                 goto out;
2837         }
2838
2839         /* This makes sure that there aren't more than 32 mesh config
2840          * parameters (otherwise our bitfield scheme would not work.) */
2841         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2842
2843         /* Fill in the params struct */
2844         mask = 0;
2845         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2846                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2847         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2848                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2849         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2850                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2851         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2852                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2853         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2854                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2855         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2856                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2857         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2858                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2859         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2860                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2861                         nla_get_u8);
2862         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2863                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2864         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2865                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2866                         nla_get_u16);
2867         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2868                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2869                         nla_get_u32);
2870         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2871                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2872                         nla_get_u16);
2873         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2874                         dot11MeshHWMPnetDiameterTraversalTime,
2875                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2876                         nla_get_u16);
2877         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2878                         dot11MeshHWMPRootMode, mask,
2879                         NL80211_MESHCONF_HWMP_ROOTMODE,
2880                         nla_get_u8);
2881
2882         /* Apply changes */
2883         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2884
2885  out:
2886         /* cleanup */
2887         cfg80211_unlock_rdev(rdev);
2888         dev_put(dev);
2889  out_rtnl:
2890         rtnl_unlock();
2891
2892         return err;
2893 }
2894
2895 #undef FILL_IN_MESH_PARAM_IF_SET
2896
2897 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2898 {
2899         struct sk_buff *msg;
2900         void *hdr = NULL;
2901         struct nlattr *nl_reg_rules;
2902         unsigned int i;
2903         int err = -EINVAL;
2904
2905         mutex_lock(&cfg80211_mutex);
2906
2907         if (!cfg80211_regdomain)
2908                 goto out;
2909
2910         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2911         if (!msg) {
2912                 err = -ENOBUFS;
2913                 goto out;
2914         }
2915
2916         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2917                              NL80211_CMD_GET_REG);
2918         if (!hdr)
2919                 goto nla_put_failure;
2920
2921         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2922                 cfg80211_regdomain->alpha2);
2923
2924         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2925         if (!nl_reg_rules)
2926                 goto nla_put_failure;
2927
2928         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2929                 struct nlattr *nl_reg_rule;
2930                 const struct ieee80211_reg_rule *reg_rule;
2931                 const struct ieee80211_freq_range *freq_range;
2932                 const struct ieee80211_power_rule *power_rule;
2933
2934                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2935                 freq_range = &reg_rule->freq_range;
2936                 power_rule = &reg_rule->power_rule;
2937
2938                 nl_reg_rule = nla_nest_start(msg, i);
2939                 if (!nl_reg_rule)
2940                         goto nla_put_failure;
2941
2942                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2943                         reg_rule->flags);
2944                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2945                         freq_range->start_freq_khz);
2946                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2947                         freq_range->end_freq_khz);
2948                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2949                         freq_range->max_bandwidth_khz);
2950                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2951                         power_rule->max_antenna_gain);
2952                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2953                         power_rule->max_eirp);
2954
2955                 nla_nest_end(msg, nl_reg_rule);
2956         }
2957
2958         nla_nest_end(msg, nl_reg_rules);
2959
2960         genlmsg_end(msg, hdr);
2961         err = genlmsg_reply(msg, info);
2962         goto out;
2963
2964 nla_put_failure:
2965         genlmsg_cancel(msg, hdr);
2966         nlmsg_free(msg);
2967         err = -EMSGSIZE;
2968 out:
2969         mutex_unlock(&cfg80211_mutex);
2970         return err;
2971 }
2972
2973 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2974 {
2975         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2976         struct nlattr *nl_reg_rule;
2977         char *alpha2 = NULL;
2978         int rem_reg_rules = 0, r = 0;
2979         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2980         struct ieee80211_regdomain *rd = NULL;
2981
2982         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2983                 return -EINVAL;
2984
2985         if (!info->attrs[NL80211_ATTR_REG_RULES])
2986                 return -EINVAL;
2987
2988         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2989
2990         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2991                         rem_reg_rules) {
2992                 num_rules++;
2993                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2994                         return -EINVAL;
2995         }
2996
2997         mutex_lock(&cfg80211_mutex);
2998
2999         if (!reg_is_valid_request(alpha2)) {
3000                 r = -EINVAL;
3001                 goto bad_reg;
3002         }
3003
3004         size_of_regd = sizeof(struct ieee80211_regdomain) +
3005                 (num_rules * sizeof(struct ieee80211_reg_rule));
3006
3007         rd = kzalloc(size_of_regd, GFP_KERNEL);
3008         if (!rd) {
3009                 r = -ENOMEM;
3010                 goto bad_reg;
3011         }
3012
3013         rd->n_reg_rules = num_rules;
3014         rd->alpha2[0] = alpha2[0];
3015         rd->alpha2[1] = alpha2[1];
3016
3017         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3018                         rem_reg_rules) {
3019                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3020                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3021                         reg_rule_policy);
3022                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3023                 if (r)
3024                         goto bad_reg;
3025
3026                 rule_idx++;
3027
3028                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3029                         r = -EINVAL;
3030                         goto bad_reg;
3031                 }
3032         }
3033
3034         BUG_ON(rule_idx != num_rules);
3035
3036         r = set_regdom(rd);
3037
3038         mutex_unlock(&cfg80211_mutex);
3039
3040         return r;
3041
3042  bad_reg:
3043         mutex_unlock(&cfg80211_mutex);
3044         kfree(rd);
3045         return r;
3046 }
3047
3048 static int validate_scan_freqs(struct nlattr *freqs)
3049 {
3050         struct nlattr *attr1, *attr2;
3051         int n_channels = 0, tmp1, tmp2;
3052
3053         nla_for_each_nested(attr1, freqs, tmp1) {
3054                 n_channels++;
3055                 /*
3056                  * Some hardware has a limited channel list for
3057                  * scanning, and it is pretty much nonsensical
3058                  * to scan for a channel twice, so disallow that
3059                  * and don't require drivers to check that the
3060                  * channel list they get isn't longer than what
3061                  * they can scan, as long as they can scan all
3062                  * the channels they registered at once.
3063                  */
3064                 nla_for_each_nested(attr2, freqs, tmp2)
3065                         if (attr1 != attr2 &&
3066                             nla_get_u32(attr1) == nla_get_u32(attr2))
3067                                 return 0;
3068         }
3069
3070         return n_channels;
3071 }
3072
3073 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3074 {
3075         struct cfg80211_registered_device *rdev;
3076         struct net_device *dev;
3077         struct cfg80211_scan_request *request;
3078         struct cfg80211_ssid *ssid;
3079         struct ieee80211_channel *channel;
3080         struct nlattr *attr;
3081         struct wiphy *wiphy;
3082         int err, tmp, n_ssids = 0, n_channels, i;
3083         enum ieee80211_band band;
3084         size_t ie_len;
3085
3086         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3087                 return -EINVAL;
3088
3089         rtnl_lock();
3090
3091         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3092         if (err)
3093                 goto out_rtnl;
3094
3095         wiphy = &rdev->wiphy;
3096
3097         if (!rdev->ops->scan) {
3098                 err = -EOPNOTSUPP;
3099                 goto out;
3100         }
3101
3102         if (!netif_running(dev)) {
3103                 err = -ENETDOWN;
3104                 goto out;
3105         }
3106
3107         if (rdev->scan_req) {
3108                 err = -EBUSY;
3109                 goto out;
3110         }
3111
3112         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3113                 n_channels = validate_scan_freqs(
3114                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3115                 if (!n_channels) {
3116                         err = -EINVAL;
3117                         goto out;
3118                 }
3119         } else {
3120                 n_channels = 0;
3121
3122                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3123                         if (wiphy->bands[band])
3124                                 n_channels += wiphy->bands[band]->n_channels;
3125         }
3126
3127         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3128                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3129                         n_ssids++;
3130
3131         if (n_ssids > wiphy->max_scan_ssids) {
3132                 err = -EINVAL;
3133                 goto out;
3134         }
3135
3136         if (info->attrs[NL80211_ATTR_IE])
3137                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3138         else
3139                 ie_len = 0;
3140
3141         if (ie_len > wiphy->max_scan_ie_len) {
3142                 err = -EINVAL;
3143                 goto out;
3144         }
3145
3146         request = kzalloc(sizeof(*request)
3147                         + sizeof(*ssid) * n_ssids
3148                         + sizeof(channel) * n_channels
3149                         + ie_len, GFP_KERNEL);
3150         if (!request) {
3151                 err = -ENOMEM;
3152                 goto out;
3153         }
3154
3155         if (n_ssids)
3156                 request->ssids = (void *)&request->channels[n_channels];
3157         request->n_ssids = n_ssids;
3158         if (ie_len) {
3159                 if (request->ssids)
3160                         request->ie = (void *)(request->ssids + n_ssids);
3161                 else
3162                         request->ie = (void *)(request->channels + n_channels);
3163         }
3164
3165         i = 0;
3166         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3167                 /* user specified, bail out if channel not found */
3168                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3169                         struct ieee80211_channel *chan;
3170
3171                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3172
3173                         if (!chan) {
3174                                 err = -EINVAL;
3175                                 goto out_free;
3176                         }
3177
3178                         /* ignore disabled channels */
3179                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3180                                 continue;
3181
3182                         request->channels[i] = chan;
3183                         i++;
3184                 }
3185         } else {
3186                 /* all channels */
3187                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3188                         int j;
3189                         if (!wiphy->bands[band])
3190                                 continue;
3191                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3192                                 struct ieee80211_channel *chan;
3193
3194                                 chan = &wiphy->bands[band]->channels[j];
3195
3196                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3197                                         continue;
3198
3199                                 request->channels[i] = chan;
3200                                 i++;
3201                         }
3202                 }
3203         }
3204
3205         if (!i) {
3206                 err = -EINVAL;
3207                 goto out_free;
3208         }
3209
3210         request->n_channels = i;
3211
3212         i = 0;
3213         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3214                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3215                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3216                                 err = -EINVAL;
3217                                 goto out_free;
3218                         }
3219                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3220                         request->ssids[i].ssid_len = nla_len(attr);
3221                         i++;
3222                 }
3223         }
3224
3225         if (info->attrs[NL80211_ATTR_IE]) {
3226                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3227                 memcpy((void *)request->ie,
3228                        nla_data(info->attrs[NL80211_ATTR_IE]),
3229                        request->ie_len);
3230         }
3231
3232         request->dev = dev;
3233         request->wiphy = &rdev->wiphy;
3234
3235         rdev->scan_req = request;
3236         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3237
3238         if (!err) {
3239                 nl80211_send_scan_start(rdev, dev);
3240                 dev_hold(dev);
3241         }
3242
3243  out_free:
3244         if (err) {
3245                 rdev->scan_req = NULL;
3246                 kfree(request);
3247         }
3248  out:
3249         cfg80211_unlock_rdev(rdev);
3250         dev_put(dev);
3251  out_rtnl:
3252         rtnl_unlock();
3253
3254         return err;
3255 }
3256
3257 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3258                             struct cfg80211_registered_device *rdev,
3259                             struct wireless_dev *wdev,
3260                             struct cfg80211_internal_bss *intbss)
3261 {
3262         struct cfg80211_bss *res = &intbss->pub;
3263         void *hdr;
3264         struct nlattr *bss;
3265         int i;
3266
3267         ASSERT_WDEV_LOCK(wdev);
3268
3269         hdr = nl80211hdr_put(msg, pid, seq, flags,
3270                              NL80211_CMD_NEW_SCAN_RESULTS);
3271         if (!hdr)
3272                 return -1;
3273
3274         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3275         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3276
3277         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3278         if (!bss)
3279                 goto nla_put_failure;
3280         if (!is_zero_ether_addr(res->bssid))
3281                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3282         if (res->information_elements && res->len_information_elements)
3283                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3284                         res->len_information_elements,
3285                         res->information_elements);
3286         if (res->beacon_ies && res->len_beacon_ies &&
3287             res->beacon_ies != res->information_elements)
3288                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3289                         res->len_beacon_ies, res->beacon_ies);
3290         if (res->tsf)
3291                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3292         if (res->beacon_interval)
3293                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3294         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3295         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3296         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3297                 jiffies_to_msecs(jiffies - intbss->ts));
3298
3299         switch (rdev->wiphy.signal_type) {
3300         case CFG80211_SIGNAL_TYPE_MBM:
3301                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3302                 break;
3303         case CFG80211_SIGNAL_TYPE_UNSPEC:
3304                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3305                 break;
3306         default:
3307                 break;
3308         }
3309
3310         switch (wdev->iftype) {
3311         case NL80211_IFTYPE_STATION:
3312                 if (intbss == wdev->current_bss)
3313                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3314                                     NL80211_BSS_STATUS_ASSOCIATED);
3315                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3316                         if (intbss != wdev->auth_bsses[i])
3317                                 continue;
3318                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3319                                     NL80211_BSS_STATUS_AUTHENTICATED);
3320                         break;
3321                 }
3322                 break;
3323         case NL80211_IFTYPE_ADHOC:
3324                 if (intbss == wdev->current_bss)
3325                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3326                                     NL80211_BSS_STATUS_IBSS_JOINED);
3327                 break;
3328         default:
3329                 break;
3330         }
3331
3332         nla_nest_end(msg, bss);
3333
3334         return genlmsg_end(msg, hdr);
3335
3336  nla_put_failure:
3337         genlmsg_cancel(msg, hdr);
3338         return -EMSGSIZE;
3339 }
3340
3341 static int nl80211_dump_scan(struct sk_buff *skb,
3342                              struct netlink_callback *cb)
3343 {
3344         struct cfg80211_registered_device *rdev;
3345         struct net_device *dev;
3346         struct cfg80211_internal_bss *scan;
3347         struct wireless_dev *wdev;
3348         int ifidx = cb->args[0];
3349         int start = cb->args[1], idx = 0;
3350         int err;
3351
3352         if (!ifidx)
3353                 ifidx = nl80211_get_ifidx(cb);
3354         if (ifidx < 0)
3355                 return ifidx;
3356         cb->args[0] = ifidx;
3357
3358         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3359         if (!dev)
3360                 return -ENODEV;
3361
3362         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3363         if (IS_ERR(rdev)) {
3364                 err = PTR_ERR(rdev);
3365                 goto out_put_netdev;
3366         }
3367
3368         wdev = dev->ieee80211_ptr;
3369
3370         wdev_lock(wdev);
3371         spin_lock_bh(&rdev->bss_lock);
3372         cfg80211_bss_expire(rdev);
3373
3374         list_for_each_entry(scan, &rdev->bss_list, list) {
3375                 if (++idx <= start)
3376                         continue;
3377                 if (nl80211_send_bss(skb,
3378                                 NETLINK_CB(cb->skb).pid,
3379                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3380                                 rdev, wdev, scan) < 0) {
3381                         idx--;
3382                         goto out;
3383                 }
3384         }
3385
3386  out:
3387         spin_unlock_bh(&rdev->bss_lock);
3388         wdev_unlock(wdev);
3389
3390         cb->args[1] = idx;
3391         err = skb->len;
3392         cfg80211_unlock_rdev(rdev);
3393  out_put_netdev:
3394         dev_put(dev);
3395
3396         return err;
3397 }
3398
3399 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3400                                 int flags, struct net_device *dev,
3401                                 struct survey_info *survey)
3402 {
3403         void *hdr;
3404         struct nlattr *infoattr;
3405
3406         /* Survey without a channel doesn't make sense */
3407         if (!survey->channel)
3408                 return -EINVAL;
3409
3410         hdr = nl80211hdr_put(msg, pid, seq, flags,
3411                              NL80211_CMD_NEW_SURVEY_RESULTS);
3412         if (!hdr)
3413                 return -ENOMEM;
3414
3415         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3416
3417         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3418         if (!infoattr)
3419                 goto nla_put_failure;
3420
3421         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3422                     survey->channel->center_freq);
3423         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3424                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3425                             survey->noise);
3426
3427         nla_nest_end(msg, infoattr);
3428
3429         return genlmsg_end(msg, hdr);
3430
3431  nla_put_failure:
3432         genlmsg_cancel(msg, hdr);
3433         return -EMSGSIZE;
3434 }
3435
3436 static int nl80211_dump_survey(struct sk_buff *skb,
3437                         struct netlink_callback *cb)
3438 {
3439         struct survey_info survey;
3440         struct cfg80211_registered_device *dev;
3441         struct net_device *netdev;
3442         int ifidx = cb->args[0];
3443         int survey_idx = cb->args[1];
3444         int res;
3445
3446         if (!ifidx)
3447                 ifidx = nl80211_get_ifidx(cb);
3448         if (ifidx < 0)
3449                 return ifidx;
3450         cb->args[0] = ifidx;
3451
3452         rtnl_lock();
3453
3454         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3455         if (!netdev) {
3456                 res = -ENODEV;
3457                 goto out_rtnl;
3458         }
3459
3460         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3461         if (IS_ERR(dev)) {
3462                 res = PTR_ERR(dev);
3463                 goto out_rtnl;
3464         }
3465
3466         if (!dev->ops->dump_survey) {
3467                 res = -EOPNOTSUPP;
3468                 goto out_err;
3469         }
3470
3471         while (1) {
3472                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3473                                             &survey);
3474                 if (res == -ENOENT)
3475                         break;
3476                 if (res)
3477                         goto out_err;
3478
3479                 if (nl80211_send_survey(skb,
3480                                 NETLINK_CB(cb->skb).pid,
3481                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3482                                 netdev,
3483                                 &survey) < 0)
3484                         goto out;
3485                 survey_idx++;
3486         }
3487
3488  out:
3489         cb->args[1] = survey_idx;
3490         res = skb->len;
3491  out_err:
3492         cfg80211_unlock_rdev(dev);
3493  out_rtnl:
3494         rtnl_unlock();
3495
3496         return res;
3497 }
3498
3499 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3500 {
3501         return auth_type <= NL80211_AUTHTYPE_MAX;
3502 }
3503
3504 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3505 {
3506         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3507                                   NL80211_WPA_VERSION_2));
3508 }
3509
3510 static bool nl80211_valid_akm_suite(u32 akm)
3511 {
3512         return akm == WLAN_AKM_SUITE_8021X ||
3513                 akm == WLAN_AKM_SUITE_PSK;
3514 }
3515
3516 static bool nl80211_valid_cipher_suite(u32 cipher)
3517 {
3518         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3519                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3520                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3521                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3522                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3523 }
3524
3525
3526 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3527 {
3528         struct cfg80211_registered_device *rdev;
3529         struct net_device *dev;
3530         struct ieee80211_channel *chan;
3531         const u8 *bssid, *ssid, *ie = NULL;
3532         int err, ssid_len, ie_len = 0;
3533         enum nl80211_auth_type auth_type;
3534         struct key_parse key;
3535         bool local_state_change;
3536
3537         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3538                 return -EINVAL;
3539
3540         if (!info->attrs[NL80211_ATTR_MAC])
3541                 return -EINVAL;
3542
3543         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3544                 return -EINVAL;
3545
3546         if (!info->attrs[NL80211_ATTR_SSID])
3547                 return -EINVAL;
3548
3549         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3550                 return -EINVAL;
3551
3552         err = nl80211_parse_key(info, &key);
3553         if (err)
3554                 return err;
3555
3556         if (key.idx >= 0) {
3557                 if (!key.p.key || !key.p.key_len)
3558                         return -EINVAL;
3559                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3560                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3561                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3562                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3563                         return -EINVAL;
3564                 if (key.idx > 4)
3565                         return -EINVAL;
3566         } else {
3567                 key.p.key_len = 0;
3568                 key.p.key = NULL;
3569         }
3570
3571         rtnl_lock();
3572
3573         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3574         if (err)
3575                 goto unlock_rtnl;
3576
3577         if (!rdev->ops->auth) {
3578                 err = -EOPNOTSUPP;
3579                 goto out;
3580         }
3581
3582         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3583                 err = -EOPNOTSUPP;
3584                 goto out;
3585         }
3586
3587         if (!netif_running(dev)) {
3588                 err = -ENETDOWN;
3589                 goto out;
3590         }
3591
3592         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3593         chan = ieee80211_get_channel(&rdev->wiphy,
3594                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3595         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3596                 err = -EINVAL;
3597                 goto out;
3598         }
3599
3600         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3601         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3602
3603         if (info->attrs[NL80211_ATTR_IE]) {
3604                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3605                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3606         }
3607
3608         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3609         if (!nl80211_valid_auth_type(auth_type)) {
3610                 err = -EINVAL;
3611                 goto out;
3612         }
3613
3614         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3615
3616         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3617                                  ssid, ssid_len, ie, ie_len,
3618                                  key.p.key, key.p.key_len, key.idx,
3619                                  local_state_change);
3620
3621 out:
3622         cfg80211_unlock_rdev(rdev);
3623         dev_put(dev);
3624 unlock_rtnl:
3625         rtnl_unlock();
3626         return err;
3627 }
3628
3629 static int nl80211_crypto_settings(struct genl_info *info,
3630                                    struct cfg80211_crypto_settings *settings,
3631                                    int cipher_limit)
3632 {
3633         memset(settings, 0, sizeof(*settings));
3634
3635         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3636
3637         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3638                 void *data;
3639                 int len, i;
3640
3641                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3642                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3643                 settings->n_ciphers_pairwise = len / sizeof(u32);
3644
3645                 if (len % sizeof(u32))
3646                         return -EINVAL;
3647
3648                 if (settings->n_ciphers_pairwise > cipher_limit)
3649                         return -EINVAL;
3650
3651                 memcpy(settings->ciphers_pairwise, data, len);
3652
3653                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3654                         if (!nl80211_valid_cipher_suite(
3655                                         settings->ciphers_pairwise[i]))
3656                                 return -EINVAL;
3657         }
3658
3659         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3660                 settings->cipher_group =
3661                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3662                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3663                         return -EINVAL;
3664         }
3665
3666         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3667                 settings->wpa_versions =
3668                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3669                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3670                         return -EINVAL;
3671         }
3672
3673         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3674                 void *data;
3675                 int len, i;
3676
3677                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3678                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3679                 settings->n_akm_suites = len / sizeof(u32);
3680
3681                 if (len % sizeof(u32))
3682                         return -EINVAL;
3683
3684                 memcpy(settings->akm_suites, data, len);
3685
3686                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3687                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3688                                 return -EINVAL;
3689         }
3690
3691         return 0;
3692 }
3693
3694 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3695 {
3696         struct cfg80211_registered_device *rdev;
3697         struct net_device *dev;
3698         struct cfg80211_crypto_settings crypto;
3699         struct ieee80211_channel *chan;
3700         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3701         int err, ssid_len, ie_len = 0;
3702         bool use_mfp = false;
3703
3704         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3705                 return -EINVAL;
3706
3707         if (!info->attrs[NL80211_ATTR_MAC] ||
3708             !info->attrs[NL80211_ATTR_SSID] ||
3709             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3710                 return -EINVAL;
3711
3712         rtnl_lock();
3713
3714         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3715         if (err)
3716                 goto unlock_rtnl;
3717
3718         if (!rdev->ops->assoc) {
3719                 err = -EOPNOTSUPP;
3720                 goto out;
3721         }
3722
3723         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3724                 err = -EOPNOTSUPP;
3725                 goto out;
3726         }
3727
3728         if (!netif_running(dev)) {
3729                 err = -ENETDOWN;
3730                 goto out;
3731         }
3732
3733         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3734
3735         chan = ieee80211_get_channel(&rdev->wiphy,
3736                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3737         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3738                 err = -EINVAL;
3739                 goto out;
3740         }
3741
3742         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3743         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3744
3745         if (info->attrs[NL80211_ATTR_IE]) {
3746                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3747                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3748         }
3749
3750         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3751                 enum nl80211_mfp mfp =
3752                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3753                 if (mfp == NL80211_MFP_REQUIRED)
3754                         use_mfp = true;
3755                 else if (mfp != NL80211_MFP_NO) {
3756                         err = -EINVAL;
3757                         goto out;
3758                 }
3759         }
3760
3761         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3762                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3763
3764         err = nl80211_crypto_settings(info, &crypto, 1);
3765         if (!err)
3766                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3767                                           ssid, ssid_len, ie, ie_len, use_mfp,
3768                                           &crypto);
3769
3770 out:
3771         cfg80211_unlock_rdev(rdev);
3772         dev_put(dev);
3773 unlock_rtnl:
3774         rtnl_unlock();
3775         return err;
3776 }
3777
3778 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3779 {
3780         struct cfg80211_registered_device *rdev;
3781         struct net_device *dev;
3782         const u8 *ie = NULL, *bssid;
3783         int err, ie_len = 0;
3784         u16 reason_code;
3785         bool local_state_change;
3786
3787         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3788                 return -EINVAL;
3789
3790         if (!info->attrs[NL80211_ATTR_MAC])
3791                 return -EINVAL;
3792
3793         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3794                 return -EINVAL;
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->deauth) {
3803                 err = -EOPNOTSUPP;
3804                 goto out;
3805         }
3806
3807         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3808                 err = -EOPNOTSUPP;
3809                 goto out;
3810         }
3811
3812         if (!netif_running(dev)) {
3813                 err = -ENETDOWN;
3814                 goto out;
3815         }
3816
3817         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3818
3819         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3820         if (reason_code == 0) {
3821                 /* Reason Code 0 is reserved */
3822                 err = -EINVAL;
3823                 goto out;
3824         }
3825
3826         if (info->attrs[NL80211_ATTR_IE]) {
3827                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3828                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3829         }
3830
3831         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3832
3833         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3834                                    local_state_change);
3835
3836 out:
3837         cfg80211_unlock_rdev(rdev);
3838         dev_put(dev);
3839 unlock_rtnl:
3840         rtnl_unlock();
3841         return err;
3842 }
3843
3844 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3845 {
3846         struct cfg80211_registered_device *rdev;
3847         struct net_device *dev;
3848         const u8 *ie = NULL, *bssid;
3849         int err, ie_len = 0;
3850         u16 reason_code;
3851         bool local_state_change;
3852
3853         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3854                 return -EINVAL;
3855
3856         if (!info->attrs[NL80211_ATTR_MAC])
3857                 return -EINVAL;
3858
3859         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3860                 return -EINVAL;
3861
3862         rtnl_lock();
3863
3864         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3865         if (err)
3866                 goto unlock_rtnl;
3867
3868         if (!rdev->ops->disassoc) {
3869                 err = -EOPNOTSUPP;
3870                 goto out;
3871         }
3872
3873         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3874                 err = -EOPNOTSUPP;
3875                 goto out;
3876         }
3877
3878         if (!netif_running(dev)) {
3879                 err = -ENETDOWN;
3880                 goto out;
3881         }
3882
3883         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3884
3885         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3886         if (reason_code == 0) {
3887                 /* Reason Code 0 is reserved */
3888                 err = -EINVAL;
3889                 goto out;
3890         }
3891
3892         if (info->attrs[NL80211_ATTR_IE]) {
3893                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3894                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3895         }
3896
3897         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3898
3899         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3900                                      local_state_change);
3901
3902 out:
3903         cfg80211_unlock_rdev(rdev);
3904         dev_put(dev);
3905 unlock_rtnl:
3906         rtnl_unlock();
3907         return err;
3908 }
3909
3910 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3911 {
3912         struct cfg80211_registered_device *rdev;
3913         struct net_device *dev;
3914         struct cfg80211_ibss_params ibss;
3915         struct wiphy *wiphy;
3916         struct cfg80211_cached_keys *connkeys = NULL;
3917         int err;
3918
3919         memset(&ibss, 0, sizeof(ibss));
3920
3921         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3922                 return -EINVAL;
3923
3924         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3925             !info->attrs[NL80211_ATTR_SSID] ||
3926             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3927                 return -EINVAL;
3928
3929         ibss.beacon_interval = 100;
3930
3931         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3932                 ibss.beacon_interval =
3933                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3934                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3935                         return -EINVAL;
3936         }
3937
3938         rtnl_lock();
3939
3940         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3941         if (err)
3942                 goto unlock_rtnl;
3943
3944         if (!rdev->ops->join_ibss) {
3945                 err = -EOPNOTSUPP;
3946                 goto out;
3947         }
3948
3949         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3950                 err = -EOPNOTSUPP;
3951                 goto out;
3952         }
3953
3954         if (!netif_running(dev)) {
3955                 err = -ENETDOWN;
3956                 goto out;
3957         }
3958
3959         wiphy = &rdev->wiphy;
3960
3961         if (info->attrs[NL80211_ATTR_MAC])
3962                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3963         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3964         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3965
3966         if (info->attrs[NL80211_ATTR_IE]) {
3967                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3968                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3969         }
3970
3971         ibss.channel = ieee80211_get_channel(wiphy,
3972                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3973         if (!ibss.channel ||
3974             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3975             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3976                 err = -EINVAL;
3977                 goto out;
3978         }
3979
3980         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3981         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3982
3983         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3984                 connkeys = nl80211_parse_connkeys(rdev,
3985                                         info->attrs[NL80211_ATTR_KEYS]);
3986                 if (IS_ERR(connkeys)) {
3987                         err = PTR_ERR(connkeys);
3988                         connkeys = NULL;
3989                         goto out;
3990                 }
3991         }
3992
3993         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3994                 u8 *rates =
3995                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3996                 int n_rates =
3997                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3998                 struct ieee80211_supported_band *sband =
3999                         wiphy->bands[ibss.channel->band];
4000                 int i, j;
4001
4002                 if (n_rates == 0) {
4003                         err = -EINVAL;
4004                         goto out;
4005                 }
4006
4007                 for (i = 0; i < n_rates; i++) {
4008                         int rate = (rates[i] & 0x7f) * 5;
4009                         bool found = false;
4010
4011                         for (j = 0; j < sband->n_bitrates; j++) {
4012                                 if (sband->bitrates[j].bitrate == rate) {
4013                                         found = true;
4014                                         ibss.basic_rates |= BIT(j);
4015                                         break;
4016                                 }
4017                         }
4018                         if (!found) {
4019                                 err = -EINVAL;
4020                                 goto out;
4021                         }
4022                 }
4023         } else {
4024                 /*
4025                 * If no rates were explicitly configured,
4026                 * use the mandatory rate set for 11b or
4027                 * 11a for maximum compatibility.
4028                 */
4029                 struct ieee80211_supported_band *sband =
4030                         wiphy->bands[ibss.channel->band];
4031                 int j;
4032                 u32 flag = ibss.channel->band == IEEE80211_BAND_5GHZ ?
4033                         IEEE80211_RATE_MANDATORY_A :
4034                         IEEE80211_RATE_MANDATORY_B;
4035
4036                 for (j = 0; j < sband->n_bitrates; j++) {
4037                         if (sband->bitrates[j].flags & flag)
4038                                 ibss.basic_rates |= BIT(j);
4039                 }
4040         }
4041
4042         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4043
4044 out:
4045         cfg80211_unlock_rdev(rdev);
4046         dev_put(dev);
4047 unlock_rtnl:
4048         if (err)
4049                 kfree(connkeys);
4050         rtnl_unlock();
4051         return err;
4052 }
4053
4054 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4055 {
4056         struct cfg80211_registered_device *rdev;
4057         struct net_device *dev;
4058         int err;
4059
4060         rtnl_lock();
4061
4062         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4063         if (err)
4064                 goto unlock_rtnl;
4065
4066         if (!rdev->ops->leave_ibss) {
4067                 err = -EOPNOTSUPP;
4068                 goto out;
4069         }
4070
4071         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4072                 err = -EOPNOTSUPP;
4073                 goto out;
4074         }
4075
4076         if (!netif_running(dev)) {
4077                 err = -ENETDOWN;
4078                 goto out;
4079         }
4080
4081         err = cfg80211_leave_ibss(rdev, dev, false);
4082
4083 out:
4084         cfg80211_unlock_rdev(rdev);
4085         dev_put(dev);
4086 unlock_rtnl:
4087         rtnl_unlock();
4088         return err;
4089 }
4090
4091 #ifdef CONFIG_NL80211_TESTMODE
4092 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4093         .name = "testmode",
4094 };
4095
4096 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4097 {
4098         struct cfg80211_registered_device *rdev;
4099         int err;
4100
4101         if (!info->attrs[NL80211_ATTR_TESTDATA])
4102                 return -EINVAL;
4103
4104         rtnl_lock();
4105
4106         rdev = cfg80211_get_dev_from_info(info);
4107         if (IS_ERR(rdev)) {
4108                 err = PTR_ERR(rdev);
4109                 goto unlock_rtnl;
4110         }
4111
4112         err = -EOPNOTSUPP;
4113         if (rdev->ops->testmode_cmd) {
4114                 rdev->testmode_info = info;
4115                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4116                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4117                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4118                 rdev->testmode_info = NULL;
4119         }
4120
4121         cfg80211_unlock_rdev(rdev);
4122
4123  unlock_rtnl:
4124         rtnl_unlock();
4125         return err;
4126 }
4127
4128 static struct sk_buff *
4129 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4130                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4131 {
4132         struct sk_buff *skb;
4133         void *hdr;
4134         struct nlattr *data;
4135
4136         skb = nlmsg_new(approxlen + 100, gfp);
4137         if (!skb)
4138                 return NULL;
4139
4140         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4141         if (!hdr) {
4142                 kfree_skb(skb);
4143                 return NULL;
4144         }
4145
4146         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4147         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4148
4149         ((void **)skb->cb)[0] = rdev;
4150         ((void **)skb->cb)[1] = hdr;
4151         ((void **)skb->cb)[2] = data;
4152
4153         return skb;
4154
4155  nla_put_failure:
4156         kfree_skb(skb);
4157         return NULL;
4158 }
4159
4160 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4161                                                   int approxlen)
4162 {
4163         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4164
4165         if (WARN_ON(!rdev->testmode_info))
4166                 return NULL;
4167
4168         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4169                                 rdev->testmode_info->snd_pid,
4170                                 rdev->testmode_info->snd_seq,
4171                                 GFP_KERNEL);
4172 }
4173 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4174
4175 int cfg80211_testmode_reply(struct sk_buff *skb)
4176 {
4177         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4178         void *hdr = ((void **)skb->cb)[1];
4179         struct nlattr *data = ((void **)skb->cb)[2];
4180
4181         if (WARN_ON(!rdev->testmode_info)) {
4182                 kfree_skb(skb);
4183                 return -EINVAL;
4184         }
4185
4186         nla_nest_end(skb, data);
4187         genlmsg_end(skb, hdr);
4188         return genlmsg_reply(skb, rdev->testmode_info);
4189 }
4190 EXPORT_SYMBOL(cfg80211_testmode_reply);
4191
4192 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4193                                                   int approxlen, gfp_t gfp)
4194 {
4195         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4196
4197         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4198 }
4199 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4200
4201 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4202 {
4203         void *hdr = ((void **)skb->cb)[1];
4204         struct nlattr *data = ((void **)skb->cb)[2];
4205
4206         nla_nest_end(skb, data);
4207         genlmsg_end(skb, hdr);
4208         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4209 }
4210 EXPORT_SYMBOL(cfg80211_testmode_event);
4211 #endif
4212
4213 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4214 {
4215         struct cfg80211_registered_device *rdev;
4216         struct net_device *dev;
4217         struct cfg80211_connect_params connect;
4218         struct wiphy *wiphy;
4219         struct cfg80211_cached_keys *connkeys = NULL;
4220         int err;
4221
4222         memset(&connect, 0, sizeof(connect));
4223
4224         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4225                 return -EINVAL;
4226
4227         if (!info->attrs[NL80211_ATTR_SSID] ||
4228             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4229                 return -EINVAL;
4230
4231         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4232                 connect.auth_type =
4233                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4234                 if (!nl80211_valid_auth_type(connect.auth_type))
4235                         return -EINVAL;
4236         } else
4237                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4238
4239         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4240
4241         err = nl80211_crypto_settings(info, &connect.crypto,
4242                                       NL80211_MAX_NR_CIPHER_SUITES);
4243         if (err)
4244                 return err;
4245         rtnl_lock();
4246
4247         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4248         if (err)
4249                 goto unlock_rtnl;
4250
4251         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4252                 err = -EOPNOTSUPP;
4253                 goto out;
4254         }
4255
4256         if (!netif_running(dev)) {
4257                 err = -ENETDOWN;
4258                 goto out;
4259         }
4260
4261         wiphy = &rdev->wiphy;
4262
4263         if (info->attrs[NL80211_ATTR_MAC])
4264                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4265         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4266         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4267
4268         if (info->attrs[NL80211_ATTR_IE]) {
4269                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4270                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4271         }
4272
4273         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4274                 connect.channel =
4275                         ieee80211_get_channel(wiphy,
4276                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4277                 if (!connect.channel ||
4278                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4279                         err = -EINVAL;
4280                         goto out;
4281                 }
4282         }
4283
4284         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4285                 connkeys = nl80211_parse_connkeys(rdev,
4286                                         info->attrs[NL80211_ATTR_KEYS]);
4287                 if (IS_ERR(connkeys)) {
4288                         err = PTR_ERR(connkeys);
4289                         connkeys = NULL;
4290                         goto out;
4291                 }
4292         }
4293
4294         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4295
4296 out:
4297         cfg80211_unlock_rdev(rdev);
4298         dev_put(dev);
4299 unlock_rtnl:
4300         if (err)
4301                 kfree(connkeys);
4302         rtnl_unlock();
4303         return err;
4304 }
4305
4306 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4307 {
4308         struct cfg80211_registered_device *rdev;
4309         struct net_device *dev;
4310         int err;
4311         u16 reason;
4312
4313         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4314                 reason = WLAN_REASON_DEAUTH_LEAVING;
4315         else
4316                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4317
4318         if (reason == 0)
4319                 return -EINVAL;
4320
4321         rtnl_lock();
4322
4323         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4324         if (err)
4325                 goto unlock_rtnl;
4326
4327         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4328                 err = -EOPNOTSUPP;
4329                 goto out;
4330         }
4331
4332         if (!netif_running(dev)) {
4333                 err = -ENETDOWN;
4334                 goto out;
4335         }
4336
4337         err = cfg80211_disconnect(rdev, dev, reason, true);
4338
4339 out:
4340         cfg80211_unlock_rdev(rdev);
4341         dev_put(dev);
4342 unlock_rtnl:
4343         rtnl_unlock();
4344         return err;
4345 }
4346
4347 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4348 {
4349         struct cfg80211_registered_device *rdev;
4350         struct net *net;
4351         int err;
4352         u32 pid;
4353
4354         if (!info->attrs[NL80211_ATTR_PID])
4355                 return -EINVAL;
4356
4357         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4358
4359         rtnl_lock();
4360
4361         rdev = cfg80211_get_dev_from_info(info);
4362         if (IS_ERR(rdev)) {
4363                 err = PTR_ERR(rdev);
4364                 goto out_rtnl;
4365         }
4366
4367         net = get_net_ns_by_pid(pid);
4368         if (IS_ERR(net)) {
4369                 err = PTR_ERR(net);
4370                 goto out;
4371         }
4372
4373         err = 0;
4374
4375         /* check if anything to do */
4376         if (net_eq(wiphy_net(&rdev->wiphy), net))
4377                 goto out_put_net;
4378
4379         err = cfg80211_switch_netns(rdev, net);
4380  out_put_net:
4381         put_net(net);
4382  out:
4383         cfg80211_unlock_rdev(rdev);
4384  out_rtnl:
4385         rtnl_unlock();
4386         return err;
4387 }
4388
4389 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4390 {
4391         struct cfg80211_registered_device *rdev;
4392         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4393                         struct cfg80211_pmksa *pmksa) = NULL;
4394         int err;
4395         struct net_device *dev;
4396         struct cfg80211_pmksa pmksa;
4397
4398         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4399
4400         if (!info->attrs[NL80211_ATTR_MAC])
4401                 return -EINVAL;
4402
4403         if (!info->attrs[NL80211_ATTR_PMKID])
4404                 return -EINVAL;
4405
4406         rtnl_lock();
4407
4408         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4409         if (err)
4410                 goto out_rtnl;
4411
4412         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4413         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4414
4415         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4416                 err = -EOPNOTSUPP;
4417                 goto out;
4418         }
4419
4420         switch (info->genlhdr->cmd) {
4421         case NL80211_CMD_SET_PMKSA:
4422                 rdev_ops = rdev->ops->set_pmksa;
4423                 break;
4424         case NL80211_CMD_DEL_PMKSA:
4425                 rdev_ops = rdev->ops->del_pmksa;
4426                 break;
4427         default:
4428                 WARN_ON(1);
4429                 break;
4430         }
4431
4432         if (!rdev_ops) {
4433                 err = -EOPNOTSUPP;
4434                 goto out;
4435         }
4436
4437         err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4438
4439  out:
4440         cfg80211_unlock_rdev(rdev);
4441         dev_put(dev);
4442  out_rtnl:
4443         rtnl_unlock();
4444
4445         return err;
4446 }
4447
4448 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4449 {
4450         struct cfg80211_registered_device *rdev;
4451         int err;
4452         struct net_device *dev;
4453
4454         rtnl_lock();
4455
4456         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4457         if (err)
4458                 goto out_rtnl;
4459
4460         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4461                 err = -EOPNOTSUPP;
4462                 goto out;
4463         }
4464
4465         if (!rdev->ops->flush_pmksa) {
4466                 err = -EOPNOTSUPP;
4467                 goto out;
4468         }
4469
4470         err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4471
4472  out:
4473         cfg80211_unlock_rdev(rdev);
4474         dev_put(dev);
4475  out_rtnl:
4476         rtnl_unlock();
4477
4478         return err;
4479
4480 }
4481
4482 static int nl80211_remain_on_channel(struct sk_buff *skb,
4483                                      struct genl_info *info)
4484 {
4485         struct cfg80211_registered_device *rdev;
4486         struct net_device *dev;
4487         struct ieee80211_channel *chan;
4488         struct sk_buff *msg;
4489         void *hdr;
4490         u64 cookie;
4491         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4492         u32 freq, duration;
4493         int err;
4494
4495         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4496             !info->attrs[NL80211_ATTR_DURATION])
4497                 return -EINVAL;
4498
4499         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4500
4501         /*
4502          * We should be on that channel for at least one jiffie,
4503          * and more than 5 seconds seems excessive.
4504          */
4505         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4506                 return -EINVAL;
4507
4508         rtnl_lock();
4509
4510         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4511         if (err)
4512                 goto unlock_rtnl;
4513
4514         if (!rdev->ops->remain_on_channel) {
4515                 err = -EOPNOTSUPP;
4516                 goto out;
4517         }
4518
4519         if (!netif_running(dev)) {
4520                 err = -ENETDOWN;
4521                 goto out;
4522         }
4523
4524         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4525                 channel_type = nla_get_u32(
4526                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4527                 if (channel_type != NL80211_CHAN_NO_HT &&
4528                     channel_type != NL80211_CHAN_HT20 &&
4529                     channel_type != NL80211_CHAN_HT40PLUS &&
4530                     channel_type != NL80211_CHAN_HT40MINUS) {
4531                         err = -EINVAL;
4532                         goto out;
4533                 }
4534         }
4535
4536         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4537         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4538         if (chan == NULL) {
4539                 err = -EINVAL;
4540                 goto out;
4541         }
4542
4543         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4544         if (!msg) {
4545                 err = -ENOMEM;
4546                 goto out;
4547         }
4548
4549         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4550                              NL80211_CMD_REMAIN_ON_CHANNEL);
4551
4552         if (IS_ERR(hdr)) {
4553                 err = PTR_ERR(hdr);
4554                 goto free_msg;
4555         }
4556
4557         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4558                                            channel_type, duration, &cookie);
4559
4560         if (err)
4561                 goto free_msg;
4562
4563         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4564
4565         genlmsg_end(msg, hdr);
4566         err = genlmsg_reply(msg, info);
4567         goto out;
4568
4569  nla_put_failure:
4570         err = -ENOBUFS;
4571  free_msg:
4572         nlmsg_free(msg);
4573  out:
4574         cfg80211_unlock_rdev(rdev);
4575         dev_put(dev);
4576  unlock_rtnl:
4577         rtnl_unlock();
4578         return err;
4579 }
4580
4581 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4582                                             struct genl_info *info)
4583 {
4584         struct cfg80211_registered_device *rdev;
4585         struct net_device *dev;
4586         u64 cookie;
4587         int err;
4588
4589         if (!info->attrs[NL80211_ATTR_COOKIE])
4590                 return -EINVAL;
4591
4592         rtnl_lock();
4593
4594         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4595         if (err)
4596                 goto unlock_rtnl;
4597
4598         if (!rdev->ops->cancel_remain_on_channel) {
4599                 err = -EOPNOTSUPP;
4600                 goto out;
4601         }
4602
4603         if (!netif_running(dev)) {
4604                 err = -ENETDOWN;
4605                 goto out;
4606         }
4607
4608         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4609
4610         err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4611
4612  out:
4613         cfg80211_unlock_rdev(rdev);
4614         dev_put(dev);
4615  unlock_rtnl:
4616         rtnl_unlock();
4617         return err;
4618 }
4619
4620 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4621                            u8 *rates, u8 rates_len)
4622 {
4623         u8 i;
4624         u32 mask = 0;
4625
4626         for (i = 0; i < rates_len; i++) {
4627                 int rate = (rates[i] & 0x7f) * 5;
4628                 int ridx;
4629                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4630                         struct ieee80211_rate *srate =
4631                                 &sband->bitrates[ridx];
4632                         if (rate == srate->bitrate) {
4633                                 mask |= 1 << ridx;
4634                                 break;
4635                         }
4636                 }
4637                 if (ridx == sband->n_bitrates)
4638                         return 0; /* rate not found */
4639         }
4640
4641         return mask;
4642 }
4643
4644 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4645         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4646                                     .len = NL80211_MAX_SUPP_RATES },
4647 };
4648
4649 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4650                                        struct genl_info *info)
4651 {
4652         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4653         struct cfg80211_registered_device *rdev;
4654         struct cfg80211_bitrate_mask mask;
4655         int err, rem, i;
4656         struct net_device *dev;
4657         struct nlattr *tx_rates;
4658         struct ieee80211_supported_band *sband;
4659
4660         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4661                 return -EINVAL;
4662
4663         rtnl_lock();
4664
4665         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4666         if (err)
4667                 goto unlock_rtnl;
4668
4669         if (!rdev->ops->set_bitrate_mask) {
4670                 err = -EOPNOTSUPP;
4671                 goto unlock;
4672         }
4673
4674         memset(&mask, 0, sizeof(mask));
4675         /* Default to all rates enabled */
4676         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4677                 sband = rdev->wiphy.bands[i];
4678                 mask.control[i].legacy =
4679                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4680         }
4681
4682         /*
4683          * The nested attribute uses enum nl80211_band as the index. This maps
4684          * directly to the enum ieee80211_band values used in cfg80211.
4685          */
4686         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4687         {
4688                 enum ieee80211_band band = nla_type(tx_rates);
4689                 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4690                         err = -EINVAL;
4691                         goto unlock;
4692                 }
4693                 sband = rdev->wiphy.bands[band];
4694                 if (sband == NULL) {
4695                         err = -EINVAL;
4696                         goto unlock;
4697                 }
4698                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4699                           nla_len(tx_rates), nl80211_txattr_policy);
4700                 if (tb[NL80211_TXRATE_LEGACY]) {
4701                         mask.control[band].legacy = rateset_to_mask(
4702                                 sband,
4703                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4704                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4705                         if (mask.control[band].legacy == 0) {
4706                                 err = -EINVAL;
4707                                 goto unlock;
4708                         }
4709                 }
4710         }
4711
4712         err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4713
4714  unlock:
4715         dev_put(dev);
4716         cfg80211_unlock_rdev(rdev);
4717  unlock_rtnl:
4718         rtnl_unlock();
4719         return err;
4720 }
4721
4722 static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
4723 {
4724         struct cfg80211_registered_device *rdev;
4725         struct net_device *dev;
4726         int err;
4727
4728         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4729                 return -EINVAL;
4730
4731         if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
4732                 return -EINVAL;
4733
4734         rtnl_lock();
4735
4736         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4737         if (err)
4738                 goto unlock_rtnl;
4739
4740         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4741             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4742                 err = -EOPNOTSUPP;
4743                 goto out;
4744         }
4745
4746         /* not much point in registering if we can't reply */
4747         if (!rdev->ops->action) {
4748                 err = -EOPNOTSUPP;
4749                 goto out;
4750         }
4751
4752         err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
4753                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4754                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4755  out:
4756         cfg80211_unlock_rdev(rdev);
4757         dev_put(dev);
4758  unlock_rtnl:
4759         rtnl_unlock();
4760         return err;
4761 }
4762
4763 static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
4764 {
4765         struct cfg80211_registered_device *rdev;
4766         struct net_device *dev;
4767         struct ieee80211_channel *chan;
4768         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4769         bool channel_type_valid = false;
4770         u32 freq;
4771         int err;
4772         void *hdr;
4773         u64 cookie;
4774         struct sk_buff *msg;
4775
4776         if (!info->attrs[NL80211_ATTR_FRAME] ||
4777             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4778                 return -EINVAL;
4779
4780         rtnl_lock();
4781
4782         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4783         if (err)
4784                 goto unlock_rtnl;
4785
4786         if (!rdev->ops->action) {
4787                 err = -EOPNOTSUPP;
4788                 goto out;
4789         }
4790
4791         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4792             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4793                 err = -EOPNOTSUPP;
4794                 goto out;
4795         }
4796
4797         if (!netif_running(dev)) {
4798                 err = -ENETDOWN;
4799                 goto out;
4800         }
4801
4802         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4803                 channel_type = nla_get_u32(
4804                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4805                 if (channel_type != NL80211_CHAN_NO_HT &&
4806                     channel_type != NL80211_CHAN_HT20 &&
4807                     channel_type != NL80211_CHAN_HT40PLUS &&
4808                     channel_type != NL80211_CHAN_HT40MINUS) {
4809                         err = -EINVAL;
4810                         goto out;
4811                 }
4812                 channel_type_valid = true;
4813         }
4814
4815         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4816         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4817         if (chan == NULL) {
4818                 err = -EINVAL;
4819                 goto out;
4820         }
4821
4822         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4823         if (!msg) {
4824                 err = -ENOMEM;
4825                 goto out;
4826         }
4827
4828         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4829                              NL80211_CMD_ACTION);
4830
4831         if (IS_ERR(hdr)) {
4832                 err = PTR_ERR(hdr);
4833                 goto free_msg;
4834         }
4835         err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
4836                                    channel_type_valid,
4837                                    nla_data(info->attrs[NL80211_ATTR_FRAME]),
4838                                    nla_len(info->attrs[NL80211_ATTR_FRAME]),
4839                                    &cookie);
4840         if (err)
4841                 goto free_msg;
4842
4843         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4844
4845         genlmsg_end(msg, hdr);
4846         err = genlmsg_reply(msg, info);
4847         goto out;
4848
4849  nla_put_failure:
4850         err = -ENOBUFS;
4851  free_msg:
4852         nlmsg_free(msg);
4853  out:
4854         cfg80211_unlock_rdev(rdev);
4855         dev_put(dev);
4856 unlock_rtnl:
4857         rtnl_unlock();
4858         return err;
4859 }
4860
4861 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4862 {
4863         struct cfg80211_registered_device *rdev;
4864         struct wireless_dev *wdev;
4865         struct net_device *dev;
4866         u8 ps_state;
4867         bool state;
4868         int err;
4869
4870         if (!info->attrs[NL80211_ATTR_PS_STATE]) {
4871                 err = -EINVAL;
4872                 goto out;
4873         }
4874
4875         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4876
4877         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
4878                 err = -EINVAL;
4879                 goto out;
4880         }
4881
4882         rtnl_lock();
4883
4884         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4885         if (err)
4886                 goto unlock_rdev;
4887
4888         wdev = dev->ieee80211_ptr;
4889
4890         if (!rdev->ops->set_power_mgmt) {
4891                 err = -EOPNOTSUPP;
4892                 goto unlock_rdev;
4893         }
4894
4895         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4896
4897         if (state == wdev->ps)
4898                 goto unlock_rdev;
4899
4900         wdev->ps = state;
4901
4902         if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
4903                                       wdev->ps_timeout))
4904                 /* assume this means it's off */
4905                 wdev->ps = false;
4906
4907 unlock_rdev:
4908         cfg80211_unlock_rdev(rdev);
4909         dev_put(dev);
4910         rtnl_unlock();
4911
4912 out:
4913         return err;
4914 }
4915
4916 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4917 {
4918         struct cfg80211_registered_device *rdev;
4919         enum nl80211_ps_state ps_state;
4920         struct wireless_dev *wdev;
4921         struct net_device *dev;
4922         struct sk_buff *msg;
4923         void *hdr;
4924         int err;
4925
4926         rtnl_lock();
4927
4928         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4929         if (err)
4930                 goto unlock_rtnl;
4931
4932         wdev = dev->ieee80211_ptr;
4933
4934         if (!rdev->ops->set_power_mgmt) {
4935                 err = -EOPNOTSUPP;
4936                 goto out;
4937         }
4938
4939         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4940         if (!msg) {
4941                 err = -ENOMEM;
4942                 goto out;
4943         }
4944
4945         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4946                              NL80211_CMD_GET_POWER_SAVE);
4947         if (!hdr) {
4948                 err = -ENOMEM;
4949                 goto free_msg;
4950         }
4951
4952         if (wdev->ps)
4953                 ps_state = NL80211_PS_ENABLED;
4954         else
4955                 ps_state = NL80211_PS_DISABLED;
4956
4957         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4958
4959         genlmsg_end(msg, hdr);
4960         err = genlmsg_reply(msg, info);
4961         goto out;
4962
4963 nla_put_failure:
4964         err = -ENOBUFS;
4965
4966 free_msg:
4967         nlmsg_free(msg);
4968
4969 out:
4970         cfg80211_unlock_rdev(rdev);
4971         dev_put(dev);
4972
4973 unlock_rtnl:
4974         rtnl_unlock();
4975
4976         return err;
4977 }
4978
4979 static struct nla_policy
4980 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4981         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4982         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4983         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4984 };
4985
4986 static int nl80211_set_cqm_rssi(struct genl_info *info,
4987                                 s32 threshold, u32 hysteresis)
4988 {
4989         struct cfg80211_registered_device *rdev;
4990         struct wireless_dev *wdev;
4991         struct net_device *dev;
4992         int err;
4993
4994         if (threshold > 0)
4995                 return -EINVAL;
4996
4997         rtnl_lock();
4998
4999         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5000         if (err)
5001                 goto unlock_rtnl;
5002
5003         wdev = dev->ieee80211_ptr;
5004
5005         if (!rdev->ops->set_cqm_rssi_config) {
5006                 err = -EOPNOTSUPP;
5007                 goto unlock_rdev;
5008         }
5009
5010         if (wdev->iftype != NL80211_IFTYPE_STATION) {
5011                 err = -EOPNOTSUPP;
5012                 goto unlock_rdev;
5013         }
5014
5015         err = rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5016                                              threshold, hysteresis);
5017
5018  unlock_rdev:
5019         cfg80211_unlock_rdev(rdev);
5020         dev_put(dev);
5021  unlock_rtnl:
5022         rtnl_unlock();
5023
5024         return err;
5025 }
5026
5027 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5028 {
5029         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5030         struct nlattr *cqm;
5031         int err;
5032
5033         cqm = info->attrs[NL80211_ATTR_CQM];
5034         if (!cqm) {
5035                 err = -EINVAL;
5036                 goto out;
5037         }
5038
5039         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5040                                nl80211_attr_cqm_policy);
5041         if (err)
5042                 goto out;
5043
5044         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5045             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5046                 s32 threshold;
5047                 u32 hysteresis;
5048                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5049                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5050                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5051         } else
5052                 err = -EINVAL;
5053
5054 out:
5055         return err;
5056 }
5057
5058 static struct genl_ops nl80211_ops[] = {
5059         {
5060                 .cmd = NL80211_CMD_GET_WIPHY,
5061                 .doit = nl80211_get_wiphy,
5062                 .dumpit = nl80211_dump_wiphy,
5063                 .policy = nl80211_policy,
5064                 /* can be retrieved by unprivileged users */
5065         },
5066         {
5067                 .cmd = NL80211_CMD_SET_WIPHY,
5068                 .doit = nl80211_set_wiphy,
5069                 .policy = nl80211_policy,
5070                 .flags = GENL_ADMIN_PERM,
5071         },
5072         {
5073                 .cmd = NL80211_CMD_GET_INTERFACE,
5074                 .doit = nl80211_get_interface,
5075                 .dumpit = nl80211_dump_interface,
5076                 .policy = nl80211_policy,
5077                 /* can be retrieved by unprivileged users */
5078         },
5079         {
5080                 .cmd = NL80211_CMD_SET_INTERFACE,
5081                 .doit = nl80211_set_interface,
5082                 .policy = nl80211_policy,
5083                 .flags = GENL_ADMIN_PERM,
5084         },
5085         {
5086                 .cmd = NL80211_CMD_NEW_INTERFACE,
5087                 .doit = nl80211_new_interface,
5088                 .policy = nl80211_policy,
5089                 .flags = GENL_ADMIN_PERM,
5090         },
5091         {
5092                 .cmd = NL80211_CMD_DEL_INTERFACE,
5093                 .doit = nl80211_del_interface,
5094                 .policy = nl80211_policy,
5095                 .flags = GENL_ADMIN_PERM,
5096         },
5097         {
5098                 .cmd = NL80211_CMD_GET_KEY,
5099                 .doit = nl80211_get_key,
5100                 .policy = nl80211_policy,
5101                 .flags = GENL_ADMIN_PERM,
5102         },
5103         {
5104                 .cmd = NL80211_CMD_SET_KEY,
5105                 .doit = nl80211_set_key,
5106                 .policy = nl80211_policy,
5107                 .flags = GENL_ADMIN_PERM,
5108         },
5109         {
5110                 .cmd = NL80211_CMD_NEW_KEY,
5111                 .doit = nl80211_new_key,
5112                 .policy = nl80211_policy,
5113                 .flags = GENL_ADMIN_PERM,
5114         },
5115         {
5116                 .cmd = NL80211_CMD_DEL_KEY,
5117                 .doit = nl80211_del_key,
5118                 .policy = nl80211_policy,
5119                 .flags = GENL_ADMIN_PERM,
5120         },
5121         {
5122                 .cmd = NL80211_CMD_SET_BEACON,
5123                 .policy = nl80211_policy,
5124                 .flags = GENL_ADMIN_PERM,
5125                 .doit = nl80211_addset_beacon,
5126         },
5127         {
5128                 .cmd = NL80211_CMD_NEW_BEACON,
5129                 .policy = nl80211_policy,
5130                 .flags = GENL_ADMIN_PERM,
5131                 .doit = nl80211_addset_beacon,
5132         },
5133         {
5134                 .cmd = NL80211_CMD_DEL_BEACON,
5135                 .policy = nl80211_policy,
5136                 .flags = GENL_ADMIN_PERM,
5137                 .doit = nl80211_del_beacon,
5138         },
5139         {
5140                 .cmd = NL80211_CMD_GET_STATION,
5141                 .doit = nl80211_get_station,
5142                 .dumpit = nl80211_dump_station,
5143                 .policy = nl80211_policy,
5144         },
5145         {
5146                 .cmd = NL80211_CMD_SET_STATION,
5147                 .doit = nl80211_set_station,
5148                 .policy = nl80211_policy,
5149                 .flags = GENL_ADMIN_PERM,
5150         },
5151         {
5152                 .cmd = NL80211_CMD_NEW_STATION,
5153                 .doit = nl80211_new_station,
5154                 .policy = nl80211_policy,
5155                 .flags = GENL_ADMIN_PERM,
5156         },
5157         {
5158                 .cmd = NL80211_CMD_DEL_STATION,
5159                 .doit = nl80211_del_station,
5160                 .policy = nl80211_policy,
5161                 .flags = GENL_ADMIN_PERM,
5162         },
5163         {
5164                 .cmd = NL80211_CMD_GET_MPATH,
5165                 .doit = nl80211_get_mpath,
5166                 .dumpit = nl80211_dump_mpath,
5167                 .policy = nl80211_policy,
5168                 .flags = GENL_ADMIN_PERM,
5169         },
5170         {
5171                 .cmd = NL80211_CMD_SET_MPATH,
5172                 .doit = nl80211_set_mpath,
5173                 .policy = nl80211_policy,
5174                 .flags = GENL_ADMIN_PERM,
5175         },
5176         {
5177                 .cmd = NL80211_CMD_NEW_MPATH,
5178                 .doit = nl80211_new_mpath,
5179                 .policy = nl80211_policy,
5180                 .flags = GENL_ADMIN_PERM,
5181         },
5182         {
5183                 .cmd = NL80211_CMD_DEL_MPATH,
5184                 .doit = nl80211_del_mpath,
5185                 .policy = nl80211_policy,
5186                 .flags = GENL_ADMIN_PERM,
5187         },
5188         {
5189                 .cmd = NL80211_CMD_SET_BSS,
5190                 .doit = nl80211_set_bss,
5191                 .policy = nl80211_policy,
5192                 .flags = GENL_ADMIN_PERM,
5193         },
5194         {
5195                 .cmd = NL80211_CMD_GET_REG,
5196                 .doit = nl80211_get_reg,
5197                 .policy = nl80211_policy,
5198                 /* can be retrieved by unprivileged users */
5199         },
5200         {
5201                 .cmd = NL80211_CMD_SET_REG,
5202                 .doit = nl80211_set_reg,
5203                 .policy = nl80211_policy,
5204                 .flags = GENL_ADMIN_PERM,
5205         },
5206         {
5207                 .cmd = NL80211_CMD_REQ_SET_REG,
5208                 .doit = nl80211_req_set_reg,
5209                 .policy = nl80211_policy,
5210                 .flags = GENL_ADMIN_PERM,
5211         },
5212         {
5213                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
5214                 .doit = nl80211_get_mesh_params,
5215                 .policy = nl80211_policy,
5216                 /* can be retrieved by unprivileged users */
5217         },
5218         {
5219                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
5220                 .doit = nl80211_set_mesh_params,
5221                 .policy = nl80211_policy,
5222                 .flags = GENL_ADMIN_PERM,
5223         },
5224         {
5225                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5226                 .doit = nl80211_trigger_scan,
5227                 .policy = nl80211_policy,
5228                 .flags = GENL_ADMIN_PERM,
5229         },
5230         {
5231                 .cmd = NL80211_CMD_GET_SCAN,
5232                 .policy = nl80211_policy,
5233                 .dumpit = nl80211_dump_scan,
5234         },
5235         {
5236                 .cmd = NL80211_CMD_AUTHENTICATE,
5237                 .doit = nl80211_authenticate,
5238                 .policy = nl80211_policy,
5239                 .flags = GENL_ADMIN_PERM,
5240         },
5241         {
5242                 .cmd = NL80211_CMD_ASSOCIATE,
5243                 .doit = nl80211_associate,
5244                 .policy = nl80211_policy,
5245                 .flags = GENL_ADMIN_PERM,
5246         },
5247         {
5248                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5249                 .doit = nl80211_deauthenticate,
5250                 .policy = nl80211_policy,
5251                 .flags = GENL_ADMIN_PERM,
5252         },
5253         {
5254                 .cmd = NL80211_CMD_DISASSOCIATE,
5255                 .doit = nl80211_disassociate,
5256                 .policy = nl80211_policy,
5257                 .flags = GENL_ADMIN_PERM,
5258         },
5259         {
5260                 .cmd = NL80211_CMD_JOIN_IBSS,
5261                 .doit = nl80211_join_ibss,
5262                 .policy = nl80211_policy,
5263                 .flags = GENL_ADMIN_PERM,
5264         },
5265         {
5266                 .cmd = NL80211_CMD_LEAVE_IBSS,
5267                 .doit = nl80211_leave_ibss,
5268                 .policy = nl80211_policy,
5269                 .flags = GENL_ADMIN_PERM,
5270         },
5271 #ifdef CONFIG_NL80211_TESTMODE
5272         {
5273                 .cmd = NL80211_CMD_TESTMODE,
5274                 .doit = nl80211_testmode_do,
5275                 .policy = nl80211_policy,
5276                 .flags = GENL_ADMIN_PERM,
5277         },
5278 #endif
5279         {
5280                 .cmd = NL80211_CMD_CONNECT,
5281                 .doit = nl80211_connect,
5282                 .policy = nl80211_policy,
5283                 .flags = GENL_ADMIN_PERM,
5284         },
5285         {
5286                 .cmd = NL80211_CMD_DISCONNECT,
5287                 .doit = nl80211_disconnect,
5288                 .policy = nl80211_policy,
5289                 .flags = GENL_ADMIN_PERM,
5290         },
5291         {
5292                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5293                 .doit = nl80211_wiphy_netns,
5294                 .policy = nl80211_policy,
5295                 .flags = GENL_ADMIN_PERM,
5296         },
5297         {
5298                 .cmd = NL80211_CMD_GET_SURVEY,
5299                 .policy = nl80211_policy,
5300                 .dumpit = nl80211_dump_survey,
5301         },
5302         {
5303                 .cmd = NL80211_CMD_SET_PMKSA,
5304                 .doit = nl80211_setdel_pmksa,
5305                 .policy = nl80211_policy,
5306                 .flags = GENL_ADMIN_PERM,
5307         },
5308         {
5309                 .cmd = NL80211_CMD_DEL_PMKSA,
5310                 .doit = nl80211_setdel_pmksa,
5311                 .policy = nl80211_policy,
5312                 .flags = GENL_ADMIN_PERM,
5313         },
5314         {
5315                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5316                 .doit = nl80211_flush_pmksa,
5317                 .policy = nl80211_policy,
5318                 .flags = GENL_ADMIN_PERM,
5319         },
5320         {
5321                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5322                 .doit = nl80211_remain_on_channel,
5323                 .policy = nl80211_policy,
5324                 .flags = GENL_ADMIN_PERM,
5325         },
5326         {
5327                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5328                 .doit = nl80211_cancel_remain_on_channel,
5329                 .policy = nl80211_policy,
5330                 .flags = GENL_ADMIN_PERM,
5331         },
5332         {
5333                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5334                 .doit = nl80211_set_tx_bitrate_mask,
5335                 .policy = nl80211_policy,
5336                 .flags = GENL_ADMIN_PERM,
5337         },
5338         {
5339                 .cmd = NL80211_CMD_REGISTER_ACTION,
5340                 .doit = nl80211_register_action,
5341                 .policy = nl80211_policy,
5342                 .flags = GENL_ADMIN_PERM,
5343         },
5344         {
5345                 .cmd = NL80211_CMD_ACTION,
5346                 .doit = nl80211_action,
5347                 .policy = nl80211_policy,
5348                 .flags = GENL_ADMIN_PERM,
5349         },
5350         {
5351                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5352                 .doit = nl80211_set_power_save,
5353                 .policy = nl80211_policy,
5354                 .flags = GENL_ADMIN_PERM,
5355         },
5356         {
5357                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5358                 .doit = nl80211_get_power_save,
5359                 .policy = nl80211_policy,
5360                 /* can be retrieved by unprivileged users */
5361         },
5362         {
5363                 .cmd = NL80211_CMD_SET_CQM,
5364                 .doit = nl80211_set_cqm,
5365                 .policy = nl80211_policy,
5366                 .flags = GENL_ADMIN_PERM,
5367         },
5368         {
5369                 .cmd = NL80211_CMD_SET_CHANNEL,
5370                 .doit = nl80211_set_channel,
5371                 .policy = nl80211_policy,
5372                 .flags = GENL_ADMIN_PERM,
5373         },
5374 };
5375
5376 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5377         .name = "mlme",
5378 };
5379
5380 /* multicast groups */
5381 static struct genl_multicast_group nl80211_config_mcgrp = {
5382         .name = "config",
5383 };
5384 static struct genl_multicast_group nl80211_scan_mcgrp = {
5385         .name = "scan",
5386 };
5387 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5388         .name = "regulatory",
5389 };
5390
5391 /* notification functions */
5392
5393 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5394 {
5395         struct sk_buff *msg;
5396
5397         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5398         if (!msg)
5399                 return;
5400
5401         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5402                 nlmsg_free(msg);
5403                 return;
5404         }
5405
5406         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5407                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5408 }
5409
5410 static int nl80211_add_scan_req(struct sk_buff *msg,
5411                                 struct cfg80211_registered_device *rdev)
5412 {
5413         struct cfg80211_scan_request *req = rdev->scan_req;
5414         struct nlattr *nest;
5415         int i;
5416
5417         ASSERT_RDEV_LOCK(rdev);
5418
5419         if (WARN_ON(!req))
5420                 return 0;
5421
5422         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5423         if (!nest)
5424                 goto nla_put_failure;
5425         for (i = 0; i < req->n_ssids; i++)
5426                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5427         nla_nest_end(msg, nest);
5428
5429         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5430         if (!nest)
5431                 goto nla_put_failure;
5432         for (i = 0; i < req->n_channels; i++)
5433                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5434         nla_nest_end(msg, nest);
5435
5436         if (req->ie)
5437                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5438
5439         return 0;
5440  nla_put_failure:
5441         return -ENOBUFS;
5442 }
5443
5444 static int nl80211_send_scan_msg(struct sk_buff *msg,
5445                                  struct cfg80211_registered_device *rdev,
5446                                  struct net_device *netdev,
5447                                  u32 pid, u32 seq, int flags,
5448                                  u32 cmd)
5449 {
5450         void *hdr;
5451
5452         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5453         if (!hdr)
5454                 return -1;
5455
5456         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5457         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5458
5459         /* ignore errors and send incomplete event anyway */
5460         nl80211_add_scan_req(msg, rdev);
5461
5462         return genlmsg_end(msg, hdr);
5463
5464  nla_put_failure:
5465         genlmsg_cancel(msg, hdr);
5466         return -EMSGSIZE;
5467 }
5468
5469 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5470                              struct net_device *netdev)
5471 {
5472         struct sk_buff *msg;
5473
5474         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5475         if (!msg)
5476                 return;
5477
5478         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5479                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5480                 nlmsg_free(msg);
5481                 return;
5482         }
5483
5484         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5485                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5486 }
5487
5488 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5489                             struct net_device *netdev)
5490 {
5491         struct sk_buff *msg;
5492
5493         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5494         if (!msg)
5495                 return;
5496
5497         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5498                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5499                 nlmsg_free(msg);
5500                 return;
5501         }
5502
5503         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5504                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5505 }
5506
5507 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5508                                struct net_device *netdev)
5509 {
5510         struct sk_buff *msg;
5511
5512         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5513         if (!msg)
5514                 return;
5515
5516         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5517                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5518                 nlmsg_free(msg);
5519                 return;
5520         }
5521
5522         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5523                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5524 }
5525
5526 /*
5527  * This can happen on global regulatory changes or device specific settings
5528  * based on custom world regulatory domains.
5529  */
5530 void nl80211_send_reg_change_event(struct regulatory_request *request)
5531 {
5532         struct sk_buff *msg;
5533         void *hdr;
5534
5535         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5536         if (!msg)
5537                 return;
5538
5539         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5540         if (!hdr) {
5541                 nlmsg_free(msg);
5542                 return;
5543         }
5544
5545         /* Userspace can always count this one always being set */
5546         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5547
5548         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5549                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5550                            NL80211_REGDOM_TYPE_WORLD);
5551         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5552                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5553                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5554         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5555                  request->intersect)
5556                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5557                            NL80211_REGDOM_TYPE_INTERSECTION);
5558         else {
5559                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5560                            NL80211_REGDOM_TYPE_COUNTRY);
5561                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5562         }
5563
5564         if (wiphy_idx_valid(request->wiphy_idx))
5565                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5566
5567         if (genlmsg_end(msg, hdr) < 0) {
5568                 nlmsg_free(msg);
5569                 return;
5570         }
5571
5572         rcu_read_lock();
5573         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5574                                 GFP_ATOMIC);
5575         rcu_read_unlock();
5576
5577         return;
5578
5579 nla_put_failure:
5580         genlmsg_cancel(msg, hdr);
5581         nlmsg_free(msg);
5582 }
5583
5584 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5585                                     struct net_device *netdev,
5586                                     const u8 *buf, size_t len,
5587                                     enum nl80211_commands cmd, gfp_t gfp)
5588 {
5589         struct sk_buff *msg;
5590         void *hdr;
5591
5592         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5593         if (!msg)
5594                 return;
5595
5596         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5597         if (!hdr) {
5598                 nlmsg_free(msg);
5599                 return;
5600         }
5601
5602         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5603         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5604         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5605
5606         if (genlmsg_end(msg, hdr) < 0) {
5607                 nlmsg_free(msg);
5608                 return;
5609         }
5610
5611         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5612                                 nl80211_mlme_mcgrp.id, gfp);
5613         return;
5614
5615  nla_put_failure:
5616         genlmsg_cancel(msg, hdr);
5617         nlmsg_free(msg);
5618 }
5619
5620 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5621                           struct net_device *netdev, const u8 *buf,
5622                           size_t len, gfp_t gfp)
5623 {
5624         nl80211_send_mlme_event(rdev, netdev, buf, len,
5625                                 NL80211_CMD_AUTHENTICATE, gfp);
5626 }
5627
5628 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5629                            struct net_device *netdev, const u8 *buf,
5630                            size_t len, gfp_t gfp)
5631 {
5632         nl80211_send_mlme_event(rdev, netdev, buf, len,
5633                                 NL80211_CMD_ASSOCIATE, gfp);
5634 }
5635
5636 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5637                          struct net_device *netdev, const u8 *buf,
5638                          size_t len, gfp_t gfp)
5639 {
5640         nl80211_send_mlme_event(rdev, netdev, buf, len,
5641                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5642 }
5643
5644 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5645                            struct net_device *netdev, const u8 *buf,
5646                            size_t len, gfp_t gfp)
5647 {
5648         nl80211_send_mlme_event(rdev, netdev, buf, len,
5649                                 NL80211_CMD_DISASSOCIATE, gfp);
5650 }
5651
5652 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5653                                       struct net_device *netdev, int cmd,
5654                                       const u8 *addr, gfp_t gfp)
5655 {
5656         struct sk_buff *msg;
5657         void *hdr;
5658
5659         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5660         if (!msg)
5661                 return;
5662
5663         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5664         if (!hdr) {
5665                 nlmsg_free(msg);
5666                 return;
5667         }
5668
5669         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5670         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5671         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5672         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5673
5674         if (genlmsg_end(msg, hdr) < 0) {
5675                 nlmsg_free(msg);
5676                 return;
5677         }
5678
5679         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5680                                 nl80211_mlme_mcgrp.id, gfp);
5681         return;
5682
5683  nla_put_failure:
5684         genlmsg_cancel(msg, hdr);
5685         nlmsg_free(msg);
5686 }
5687
5688 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5689                                struct net_device *netdev, const u8 *addr,
5690                                gfp_t gfp)
5691 {
5692         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5693                                   addr, gfp);
5694 }
5695
5696 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5697                                 struct net_device *netdev, const u8 *addr,
5698                                 gfp_t gfp)
5699 {
5700         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5701                                   addr, gfp);
5702 }
5703
5704 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5705                                  struct net_device *netdev, const u8 *bssid,
5706                                  const u8 *req_ie, size_t req_ie_len,
5707                                  const u8 *resp_ie, size_t resp_ie_len,
5708                                  u16 status, gfp_t gfp)
5709 {
5710         struct sk_buff *msg;
5711         void *hdr;
5712
5713         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5714         if (!msg)
5715                 return;
5716
5717         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5718         if (!hdr) {
5719                 nlmsg_free(msg);
5720                 return;
5721         }
5722
5723         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5724         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5725         if (bssid)
5726                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5727         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5728         if (req_ie)
5729                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5730         if (resp_ie)
5731                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5732
5733         if (genlmsg_end(msg, hdr) < 0) {
5734                 nlmsg_free(msg);
5735                 return;
5736         }
5737
5738         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5739                                 nl80211_mlme_mcgrp.id, gfp);
5740         return;
5741
5742  nla_put_failure:
5743         genlmsg_cancel(msg, hdr);
5744         nlmsg_free(msg);
5745
5746 }
5747
5748 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5749                          struct net_device *netdev, const u8 *bssid,
5750                          const u8 *req_ie, size_t req_ie_len,
5751                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5752 {
5753         struct sk_buff *msg;
5754         void *hdr;
5755
5756         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5757         if (!msg)
5758                 return;
5759
5760         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5761         if (!hdr) {
5762                 nlmsg_free(msg);
5763                 return;
5764         }
5765
5766         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5767         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5768         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5769         if (req_ie)
5770                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5771         if (resp_ie)
5772                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5773
5774         if (genlmsg_end(msg, hdr) < 0) {
5775                 nlmsg_free(msg);
5776                 return;
5777         }
5778
5779         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5780                                 nl80211_mlme_mcgrp.id, gfp);
5781         return;
5782
5783  nla_put_failure:
5784         genlmsg_cancel(msg, hdr);
5785         nlmsg_free(msg);
5786
5787 }
5788
5789 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5790                                struct net_device *netdev, u16 reason,
5791                                const u8 *ie, size_t ie_len, bool from_ap)
5792 {
5793         struct sk_buff *msg;
5794         void *hdr;
5795
5796         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5797         if (!msg)
5798                 return;
5799
5800         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5801         if (!hdr) {
5802                 nlmsg_free(msg);
5803                 return;
5804         }
5805
5806         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5807         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5808         if (from_ap && reason)
5809                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5810         if (from_ap)
5811                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5812         if (ie)
5813                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5814
5815         if (genlmsg_end(msg, hdr) < 0) {
5816                 nlmsg_free(msg);
5817                 return;
5818         }
5819
5820         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5821                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5822         return;
5823
5824  nla_put_failure:
5825         genlmsg_cancel(msg, hdr);
5826         nlmsg_free(msg);
5827
5828 }
5829
5830 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5831                              struct net_device *netdev, const u8 *bssid,
5832                              gfp_t gfp)
5833 {
5834         struct sk_buff *msg;
5835         void *hdr;
5836
5837         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5838         if (!msg)
5839                 return;
5840
5841         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5842         if (!hdr) {
5843                 nlmsg_free(msg);
5844                 return;
5845         }
5846
5847         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5848         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5849         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5850
5851         if (genlmsg_end(msg, hdr) < 0) {
5852                 nlmsg_free(msg);
5853                 return;
5854         }
5855
5856         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5857                                 nl80211_mlme_mcgrp.id, gfp);
5858         return;
5859
5860  nla_put_failure:
5861         genlmsg_cancel(msg, hdr);
5862         nlmsg_free(msg);
5863 }
5864
5865 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5866                                  struct net_device *netdev, const u8 *addr,
5867                                  enum nl80211_key_type key_type, int key_id,
5868                                  const u8 *tsc, gfp_t gfp)
5869 {
5870         struct sk_buff *msg;
5871         void *hdr;
5872
5873         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5874         if (!msg)
5875                 return;
5876
5877         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5878         if (!hdr) {
5879                 nlmsg_free(msg);
5880                 return;
5881         }
5882
5883         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5884         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5885         if (addr)
5886                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5887         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5888         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5889         if (tsc)
5890                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5891
5892         if (genlmsg_end(msg, hdr) < 0) {
5893                 nlmsg_free(msg);
5894                 return;
5895         }
5896
5897         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5898                                 nl80211_mlme_mcgrp.id, gfp);
5899         return;
5900
5901  nla_put_failure:
5902         genlmsg_cancel(msg, hdr);
5903         nlmsg_free(msg);
5904 }
5905
5906 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5907                                     struct ieee80211_channel *channel_before,
5908                                     struct ieee80211_channel *channel_after)
5909 {
5910         struct sk_buff *msg;
5911         void *hdr;
5912         struct nlattr *nl_freq;
5913
5914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5915         if (!msg)
5916                 return;
5917
5918         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5919         if (!hdr) {
5920                 nlmsg_free(msg);
5921                 return;
5922         }
5923
5924         /*
5925          * Since we are applying the beacon hint to a wiphy we know its
5926          * wiphy_idx is valid
5927          */
5928         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5929
5930         /* Before */
5931         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5932         if (!nl_freq)
5933                 goto nla_put_failure;
5934         if (nl80211_msg_put_channel(msg, channel_before))
5935                 goto nla_put_failure;
5936         nla_nest_end(msg, nl_freq);
5937
5938         /* After */
5939         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5940         if (!nl_freq)
5941                 goto nla_put_failure;
5942         if (nl80211_msg_put_channel(msg, channel_after))
5943                 goto nla_put_failure;
5944         nla_nest_end(msg, nl_freq);
5945
5946         if (genlmsg_end(msg, hdr) < 0) {
5947                 nlmsg_free(msg);
5948                 return;
5949         }
5950
5951         rcu_read_lock();
5952         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5953                                 GFP_ATOMIC);
5954         rcu_read_unlock();
5955
5956         return;
5957
5958 nla_put_failure:
5959         genlmsg_cancel(msg, hdr);
5960         nlmsg_free(msg);
5961 }
5962
5963 static void nl80211_send_remain_on_chan_event(
5964         int cmd, struct cfg80211_registered_device *rdev,
5965         struct net_device *netdev, u64 cookie,
5966         struct ieee80211_channel *chan,
5967         enum nl80211_channel_type channel_type,
5968         unsigned int duration, gfp_t gfp)
5969 {
5970         struct sk_buff *msg;
5971         void *hdr;
5972
5973         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5974         if (!msg)
5975                 return;
5976
5977         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5978         if (!hdr) {
5979                 nlmsg_free(msg);
5980                 return;
5981         }
5982
5983         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5984         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5985         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5986         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5987         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5988
5989         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5990                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5991
5992         if (genlmsg_end(msg, hdr) < 0) {
5993                 nlmsg_free(msg);
5994                 return;
5995         }
5996
5997         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5998                                 nl80211_mlme_mcgrp.id, gfp);
5999         return;
6000
6001  nla_put_failure:
6002         genlmsg_cancel(msg, hdr);
6003         nlmsg_free(msg);
6004 }
6005
6006 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
6007                                     struct net_device *netdev, u64 cookie,
6008                                     struct ieee80211_channel *chan,
6009                                     enum nl80211_channel_type channel_type,
6010                                     unsigned int duration, gfp_t gfp)
6011 {
6012         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
6013                                           rdev, netdev, cookie, chan,
6014                                           channel_type, duration, gfp);
6015 }
6016
6017 void nl80211_send_remain_on_channel_cancel(
6018         struct cfg80211_registered_device *rdev, struct net_device *netdev,
6019         u64 cookie, struct ieee80211_channel *chan,
6020         enum nl80211_channel_type channel_type, gfp_t gfp)
6021 {
6022         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6023                                           rdev, netdev, cookie, chan,
6024                                           channel_type, 0, gfp);
6025 }
6026
6027 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
6028                             struct net_device *dev, const u8 *mac_addr,
6029                             struct station_info *sinfo, gfp_t gfp)
6030 {
6031         struct sk_buff *msg;
6032
6033         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6034         if (!msg)
6035                 return;
6036
6037         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6038                 nlmsg_free(msg);
6039                 return;
6040         }
6041
6042         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6043                                 nl80211_mlme_mcgrp.id, gfp);
6044 }
6045
6046 int nl80211_send_action(struct cfg80211_registered_device *rdev,
6047                         struct net_device *netdev, u32 nlpid,
6048                         int freq, const u8 *buf, size_t len, gfp_t gfp)
6049 {
6050         struct sk_buff *msg;
6051         void *hdr;
6052         int err;
6053
6054         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6055         if (!msg)
6056                 return -ENOMEM;
6057
6058         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
6059         if (!hdr) {
6060                 nlmsg_free(msg);
6061                 return -ENOMEM;
6062         }
6063
6064         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6065         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6066         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6067         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6068
6069         err = genlmsg_end(msg, hdr);
6070         if (err < 0) {
6071                 nlmsg_free(msg);
6072                 return err;
6073         }
6074
6075         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6076         if (err < 0)
6077                 return err;
6078         return 0;
6079
6080  nla_put_failure:
6081         genlmsg_cancel(msg, hdr);
6082         nlmsg_free(msg);
6083         return -ENOBUFS;
6084 }
6085
6086 void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
6087                                    struct net_device *netdev, u64 cookie,
6088                                    const u8 *buf, size_t len, bool ack,
6089                                    gfp_t gfp)
6090 {
6091         struct sk_buff *msg;
6092         void *hdr;
6093
6094         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6095         if (!msg)
6096                 return;
6097
6098         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
6099         if (!hdr) {
6100                 nlmsg_free(msg);
6101                 return;
6102         }
6103
6104         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6105         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6106         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6107         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6108         if (ack)
6109                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6110
6111         if (genlmsg_end(msg, hdr) < 0) {
6112                 nlmsg_free(msg);
6113                 return;
6114         }
6115
6116         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6117         return;
6118
6119  nla_put_failure:
6120         genlmsg_cancel(msg, hdr);
6121         nlmsg_free(msg);
6122 }
6123
6124 void
6125 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6126                              struct net_device *netdev,
6127                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6128                              gfp_t gfp)
6129 {
6130         struct sk_buff *msg;
6131         struct nlattr *pinfoattr;
6132         void *hdr;
6133
6134         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6135         if (!msg)
6136                 return;
6137
6138         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6139         if (!hdr) {
6140                 nlmsg_free(msg);
6141                 return;
6142         }
6143
6144         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6145         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6146
6147         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6148         if (!pinfoattr)
6149                 goto nla_put_failure;
6150
6151         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6152                     rssi_event);
6153
6154         nla_nest_end(msg, pinfoattr);
6155
6156         if (genlmsg_end(msg, hdr) < 0) {
6157                 nlmsg_free(msg);
6158                 return;
6159         }
6160
6161         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6162                                 nl80211_mlme_mcgrp.id, gfp);
6163         return;
6164
6165  nla_put_failure:
6166         genlmsg_cancel(msg, hdr);
6167         nlmsg_free(msg);
6168 }
6169
6170 static int nl80211_netlink_notify(struct notifier_block * nb,
6171                                   unsigned long state,
6172                                   void *_notify)
6173 {
6174         struct netlink_notify *notify = _notify;
6175         struct cfg80211_registered_device *rdev;
6176         struct wireless_dev *wdev;
6177
6178         if (state != NETLINK_URELEASE)
6179                 return NOTIFY_DONE;
6180
6181         rcu_read_lock();
6182
6183         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6184                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6185                         cfg80211_mlme_unregister_actions(wdev, notify->pid);
6186
6187         rcu_read_unlock();
6188
6189         return NOTIFY_DONE;
6190 }
6191
6192 static struct notifier_block nl80211_netlink_notifier = {
6193         .notifier_call = nl80211_netlink_notify,
6194 };
6195
6196 /* initialisation/exit functions */
6197
6198 int nl80211_init(void)
6199 {
6200         int err;
6201
6202         err = genl_register_family_with_ops(&nl80211_fam,
6203                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6204         if (err)
6205                 return err;
6206
6207         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6208         if (err)
6209                 goto err_out;
6210
6211         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6212         if (err)
6213                 goto err_out;
6214
6215         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6216         if (err)
6217                 goto err_out;
6218
6219         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6220         if (err)
6221                 goto err_out;
6222
6223 #ifdef CONFIG_NL80211_TESTMODE
6224         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6225         if (err)
6226                 goto err_out;
6227 #endif
6228
6229         err = netlink_register_notifier(&nl80211_netlink_notifier);
6230         if (err)
6231                 goto err_out;
6232
6233         return 0;
6234  err_out:
6235         genl_unregister_family(&nl80211_fam);
6236         return err;
6237 }
6238
6239 void nl80211_exit(void)
6240 {
6241         netlink_unregister_notifier(&nl80211_netlink_notifier);
6242         genl_unregister_family(&nl80211_fam);
6243 }