net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  27                             struct genl_info *info);
  28 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  29                               struct genl_info *info);
  30
  31 /* the netlink family */
  32 static struct genl_family nl80211_fam = {
  33         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  34         .name = "nl80211",      /* have users key off the name instead */
  35         .hdrsize = 0,           /* no private header */
  36         .version = 1,           /* no particular meaning now */
  37         .maxattr = NL80211_ATTR_MAX,
  38         .netnsok = true,
  39         .pre_doit = nl80211_pre_doit,
  40         .post_doit = nl80211_post_doit,
  41 };
  42
  43 /* internal helper: get rdev and dev */
  44 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  45                                        struct cfg80211_registered_device **rdev,
  46                                        struct net_device **dev)
  47 {
  48         struct nlattr **attrs = info->attrs;
  49         int ifindex;
  50
  51         if (!attrs[NL80211_ATTR_IFINDEX])
  52                 return -EINVAL;
  53
  54         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  55         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  56         if (!*dev)
  57                 return -ENODEV;
  58
  59         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  60         if (IS_ERR(*rdev)) {
  61                 dev_put(*dev);
  62                 return PTR_ERR(*rdev);
  63         }
  64
  65         return 0;
  66 }
  67
  68 /* policy for the attributes */
  69 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  70         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  72                                       .len = 20-1 },
  73         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  74         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  75         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  77         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  78         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  79         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  81
  82         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  83         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  84         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  85
  86         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  87         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  88
  89         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  90         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  91                                     .len = WLAN_MAX_KEY_LEN },
  92         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  93         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  94         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  95         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  96         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
  97
  98         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  99         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 100         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 101                                        .len = IEEE80211_MAX_DATA_LEN },
 102         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 103                                        .len = IEEE80211_MAX_DATA_LEN },
 104         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 105         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 106         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 107         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 108                                                .len = NL80211_MAX_SUPP_RATES },
 109         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 110         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 111         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 112         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 113                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 114         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 115
 116         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 117         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 120         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 121         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 122         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 123                                            .len = NL80211_MAX_SUPP_RATES },
 124
 125         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 126
 127         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 128                                          .len = NL80211_HT_CAPABILITY_LEN },
 129
 130         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 131         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 132                               .len = IEEE80211_MAX_DATA_LEN },
 133         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 134         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 135
 136         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 137                                 .len = IEEE80211_MAX_SSID_LEN },
 138         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 139         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 140         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 141         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 142         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 143         [NL80211_ATTR_STA_FLAGS2] = {
 144                 .len = sizeof(struct nl80211_sta_flag_update),
 145         },
 146         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 147         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 148         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 149         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 150         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 151         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 152         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 153         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 154         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 155                                  .len = WLAN_PMKID_LEN },
 156         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 157         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 158         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 159         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 160                                  .len = IEEE80211_MAX_DATA_LEN },
 161         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 162         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 163         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 164         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 165         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 166         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 167         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 168         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 169         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 170         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 171         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 172         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 173 };
 174
 175 /* policy for the key attributes */
 176 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 177         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 178         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 179         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 180         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 181         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 182         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 183         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 184 };
 185
 186 /* ifidx get helper */
 187 static int nl80211_get_ifidx(struct netlink_callback *cb)
 188 {
 189         int res;
 190
 191         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 192                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 193                           nl80211_policy);
 194         if (res)
 195                 return res;
 196
 197         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 198                 return -EINVAL;
 199
 200         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 201         if (!res)
 202                 return -EINVAL;
 203         return res;
 204 }
 205
 206 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 207                                        struct netlink_callback *cb,
 208                                        struct cfg80211_registered_device **rdev,
 209                                        struct net_device **dev)
 210 {
 211         int ifidx = cb->args[0];
 212         int err;
 213
 214         if (!ifidx)
 215                 ifidx = nl80211_get_ifidx(cb);
 216         if (ifidx < 0)
 217                 return ifidx;
 218
 219         cb->args[0] = ifidx;
 220
 221         rtnl_lock();
 222
 223         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 224         if (!*dev) {
 225                 err = -ENODEV;
 226                 goto out_rtnl;
 227         }
 228
 229         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 230         if (IS_ERR(*rdev)) {
 231                 err = PTR_ERR(*rdev);
 232                 goto out_rtnl;
 233         }
 234
 235         return 0;
 236  out_rtnl:
 237         rtnl_unlock();
 238         return err;
 239 }
 240
 241 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 242 {
 243         cfg80211_unlock_rdev(rdev);
 244         rtnl_unlock();
 245 }
 246
 247 /* IE validation */
 248 static bool is_valid_ie_attr(const struct nlattr *attr)
 249 {
 250         const u8 *pos;
 251         int len;
 252
 253         if (!attr)
 254                 return true;
 255
 256         pos = nla_data(attr);
 257         len = nla_len(attr);
 258
 259         while (len) {
 260                 u8 elemlen;
 261
 262                 if (len < 2)
 263                         return false;
 264                 len -= 2;
 265
 266                 elemlen = pos[1];
 267                 if (elemlen > len)
 268                         return false;
 269
 270                 len -= elemlen;
 271                 pos += 2 + elemlen;
 272         }
 273
 274         return true;
 275 }
 276
 277 /* message building helper */
 278 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 279                                    int flags, u8 cmd)
 280 {
 281         /* since there is no private header just add the generic one */
 282         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 283 }
 284
 285 static int nl80211_msg_put_channel(struct sk_buff *msg,
 286                                    struct ieee80211_channel *chan)
 287 {
 288         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 289                     chan->center_freq);
 290
 291         if (chan->flags & IEEE80211_CHAN_DISABLED)
 292                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 293         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 294                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 295         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 296                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 297         if (chan->flags & IEEE80211_CHAN_RADAR)
 298                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 299
 300         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 301                     DBM_TO_MBM(chan->max_power));
 302
 303         return 0;
 304
 305  nla_put_failure:
 306         return -ENOBUFS;
 307 }
 308
 309 /* netlink command implementations */
 310
 311 struct key_parse {
 312         struct key_params p;
 313         int idx;
 314         int type;
 315         bool def, defmgmt;
 316 };
 317
 318 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 319 {
 320         struct nlattr *tb[NL80211_KEY_MAX + 1];
 321         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 322                                    nl80211_key_policy);
 323         if (err)
 324                 return err;
 325
 326         k->def = !!tb[NL80211_KEY_DEFAULT];
 327         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 328
 329         if (tb[NL80211_KEY_IDX])
 330                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 331
 332         if (tb[NL80211_KEY_DATA]) {
 333                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 334                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 335         }
 336
 337         if (tb[NL80211_KEY_SEQ]) {
 338                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 339                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 340         }
 341
 342         if (tb[NL80211_KEY_CIPHER])
 343                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 344
 345         if (tb[NL80211_KEY_TYPE]) {
 346                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 347                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 348                         return -EINVAL;
 349         }
 350
 351         return 0;
 352 }
 353
 354 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 355 {
 356         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 357                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 358                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 359         }
 360
 361         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 362                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 363                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 364         }
 365
 366         if (info->attrs[NL80211_ATTR_KEY_IDX])
 367                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 368
 369         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 370                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 371
 372         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 373         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 374
 375         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 376                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 377                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 378                         return -EINVAL;
 379         }
 380
 381         return 0;
 382 }
 383
 384 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 385 {
 386         int err;
 387
 388         memset(k, 0, sizeof(*k));
 389         k->idx = -1;
 390         k->type = -1;
 391
 392         if (info->attrs[NL80211_ATTR_KEY])
 393                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 394         else
 395                 err = nl80211_parse_key_old(info, k);
 396
 397         if (err)
 398                 return err;
 399
 400         if (k->def && k->defmgmt)
 401                 return -EINVAL;
 402
 403         if (k->idx != -1) {
 404                 if (k->defmgmt) {
 405                         if (k->idx < 4 || k->idx > 5)
 406                                 return -EINVAL;
 407                 } else if (k->def) {
 408                         if (k->idx < 0 || k->idx > 3)
 409                                 return -EINVAL;
 410                 } else {
 411                         if (k->idx < 0 || k->idx > 5)
 412                                 return -EINVAL;
 413                 }
 414         }
 415
 416         return 0;
 417 }
 418
 419 static struct cfg80211_cached_keys *
 420 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 421                        struct nlattr *keys)
 422 {
 423         struct key_parse parse;
 424         struct nlattr *key;
 425         struct cfg80211_cached_keys *result;
 426         int rem, err, def = 0;
 427
 428         result = kzalloc(sizeof(*result), GFP_KERNEL);
 429         if (!result)
 430                 return ERR_PTR(-ENOMEM);
 431
 432         result->def = -1;
 433         result->defmgmt = -1;
 434
 435         nla_for_each_nested(key, keys, rem) {
 436                 memset(&parse, 0, sizeof(parse));
 437                 parse.idx = -1;
 438
 439                 err = nl80211_parse_key_new(key, &parse);
 440                 if (err)
 441                         goto error;
 442                 err = -EINVAL;
 443                 if (!parse.p.key)
 444                         goto error;
 445                 if (parse.idx < 0 || parse.idx > 4)
 446                         goto error;
 447                 if (parse.def) {
 448                         if (def)
 449                                 goto error;
 450                         def = 1;
 451                         result->def = parse.idx;
 452                 } else if (parse.defmgmt)
 453                         goto error;
 454                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 455                                                      parse.idx, false, NULL);
 456                 if (err)
 457                         goto error;
 458                 result->params[parse.idx].cipher = parse.p.cipher;
 459                 result->params[parse.idx].key_len = parse.p.key_len;
 460                 result->params[parse.idx].key = result->data[parse.idx];
 461                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 462         }
 463
 464         return result;
 465  error:
 466         kfree(result);
 467         return ERR_PTR(err);
 468 }
 469
 470 static int nl80211_key_allowed(struct wireless_dev *wdev)
 471 {
 472         ASSERT_WDEV_LOCK(wdev);
 473
 474         switch (wdev->iftype) {
 475         case NL80211_IFTYPE_AP:
 476         case NL80211_IFTYPE_AP_VLAN:
 477         case NL80211_IFTYPE_P2P_GO:
 478                 break;
 479         case NL80211_IFTYPE_ADHOC:
 480                 if (!wdev->current_bss)
 481                         return -ENOLINK;
 482                 break;
 483         case NL80211_IFTYPE_STATION:
 484         case NL80211_IFTYPE_P2P_CLIENT:
 485                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 486                         return -ENOLINK;
 487                 break;
 488         default:
 489                 return -EINVAL;
 490         }
 491
 492         return 0;
 493 }
 494
 495 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 496                               struct cfg80211_registered_device *dev)
 497 {
 498         void *hdr;
 499         struct nlattr *nl_bands, *nl_band;
 500         struct nlattr *nl_freqs, *nl_freq;
 501         struct nlattr *nl_rates, *nl_rate;
 502         struct nlattr *nl_modes;
 503         struct nlattr *nl_cmds;
 504         enum ieee80211_band band;
 505         struct ieee80211_channel *chan;
 506         struct ieee80211_rate *rate;
 507         int i;
 508         u16 ifmodes = dev->wiphy.interface_modes;
 509         const struct ieee80211_txrx_stypes *mgmt_stypes =
 510                                 dev->wiphy.mgmt_stypes;
 511
 512         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 513         if (!hdr)
 514                 return -1;
 515
 516         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 517         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 518
 519         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 520                     cfg80211_rdev_list_generation);
 521
 522         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 523                    dev->wiphy.retry_short);
 524         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 525                    dev->wiphy.retry_long);
 526         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 527                     dev->wiphy.frag_threshold);
 528         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 529                     dev->wiphy.rts_threshold);
 530         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 531                     dev->wiphy.coverage_class);
 532         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 533                    dev->wiphy.max_scan_ssids);
 534         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 535                     dev->wiphy.max_scan_ie_len);
 536
 537         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 538                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 539
 540         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 541                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 542                 dev->wiphy.cipher_suites);
 543
 544         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 545                    dev->wiphy.max_num_pmkids);
 546
 547         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 548                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 549
 550         if (dev->ops->get_antenna) {
 551                 u32 tx_ant = 0, rx_ant = 0;
 552                 int res;
 553                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 554                 if (!res) {
 555                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 556                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 557                 }
 558         }
 559
 560         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 561         if (!nl_modes)
 562                 goto nla_put_failure;
 563
 564         i = 0;
 565         while (ifmodes) {
 566                 if (ifmodes & 1)
 567                         NLA_PUT_FLAG(msg, i);
 568                 ifmodes >>= 1;
 569                 i++;
 570         }
 571
 572         nla_nest_end(msg, nl_modes);
 573
 574         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 575         if (!nl_bands)
 576                 goto nla_put_failure;
 577
 578         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 579                 if (!dev->wiphy.bands[band])
 580                         continue;
 581
 582                 nl_band = nla_nest_start(msg, band);
 583                 if (!nl_band)
 584                         goto nla_put_failure;
 585
 586                 /* add HT info */
 587                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 588                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 589                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 590                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 591                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 592                                 dev->wiphy.bands[band]->ht_cap.cap);
 593                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 594                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 595                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 596                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 597                 }
 598
 599                 /* add frequencies */
 600                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 601                 if (!nl_freqs)
 602                         goto nla_put_failure;
 603
 604                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 605                         nl_freq = nla_nest_start(msg, i);
 606                         if (!nl_freq)
 607                                 goto nla_put_failure;
 608
 609                         chan = &dev->wiphy.bands[band]->channels[i];
 610
 611                         if (nl80211_msg_put_channel(msg, chan))
 612                                 goto nla_put_failure;
 613
 614                         nla_nest_end(msg, nl_freq);
 615                 }
 616
 617                 nla_nest_end(msg, nl_freqs);
 618
 619                 /* add bitrates */
 620                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 621                 if (!nl_rates)
 622                         goto nla_put_failure;
 623
 624                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 625                         nl_rate = nla_nest_start(msg, i);
 626                         if (!nl_rate)
 627                                 goto nla_put_failure;
 628
 629                         rate = &dev->wiphy.bands[band]->bitrates[i];
 630                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 631                                     rate->bitrate);
 632                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 633                                 NLA_PUT_FLAG(msg,
 634                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 635
 636                         nla_nest_end(msg, nl_rate);
 637                 }
 638
 639                 nla_nest_end(msg, nl_rates);
 640
 641                 nla_nest_end(msg, nl_band);
 642         }
 643         nla_nest_end(msg, nl_bands);
 644
 645         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 646         if (!nl_cmds)
 647                 goto nla_put_failure;
 648
 649         i = 0;
 650 #define CMD(op, n)                                              \
 651          do {                                                   \
 652                 if (dev->ops->op) {                             \
 653                         i++;                                    \
 654                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 655                 }                                               \
 656         } while (0)
 657
 658         CMD(add_virtual_intf, NEW_INTERFACE);
 659         CMD(change_virtual_intf, SET_INTERFACE);
 660         CMD(add_key, NEW_KEY);
 661         CMD(add_beacon, NEW_BEACON);
 662         CMD(add_station, NEW_STATION);
 663         CMD(add_mpath, NEW_MPATH);
 664         CMD(set_mesh_params, SET_MESH_PARAMS);
 665         CMD(change_bss, SET_BSS);
 666         CMD(auth, AUTHENTICATE);
 667         CMD(assoc, ASSOCIATE);
 668         CMD(deauth, DEAUTHENTICATE);
 669         CMD(disassoc, DISASSOCIATE);
 670         CMD(join_ibss, JOIN_IBSS);
 671         CMD(set_pmksa, SET_PMKSA);
 672         CMD(del_pmksa, DEL_PMKSA);
 673         CMD(flush_pmksa, FLUSH_PMKSA);
 674         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 675         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 676         CMD(mgmt_tx, FRAME);
 677         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 678         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 679                 i++;
 680                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 681         }
 682         CMD(set_channel, SET_CHANNEL);
 683         CMD(set_wds_peer, SET_WDS_PEER);
 684
 685 #undef CMD
 686
 687         if (dev->ops->connect || dev->ops->auth) {
 688                 i++;
 689                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 690         }
 691
 692         if (dev->ops->disconnect || dev->ops->deauth) {
 693                 i++;
 694                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 695         }
 696
 697         nla_nest_end(msg, nl_cmds);
 698
 699         /* for now at least assume all drivers have it */
 700         if (dev->ops->mgmt_tx)
 701                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 702
 703         if (mgmt_stypes) {
 704                 u16 stypes;
 705                 struct nlattr *nl_ftypes, *nl_ifs;
 706                 enum nl80211_iftype ift;
 707
 708                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 709                 if (!nl_ifs)
 710                         goto nla_put_failure;
 711
 712                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 713                         nl_ftypes = nla_nest_start(msg, ift);
 714                         if (!nl_ftypes)
 715                                 goto nla_put_failure;
 716                         i = 0;
 717                         stypes = mgmt_stypes[ift].tx;
 718                         while (stypes) {
 719                                 if (stypes & 1)
 720                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 721                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 722                                 stypes >>= 1;
 723                                 i++;
 724                         }
 725                         nla_nest_end(msg, nl_ftypes);
 726                 }
 727
 728                 nla_nest_end(msg, nl_ifs);
 729
 730                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 731                 if (!nl_ifs)
 732                         goto nla_put_failure;
 733
 734                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 735                         nl_ftypes = nla_nest_start(msg, ift);
 736                         if (!nl_ftypes)
 737                                 goto nla_put_failure;
 738                         i = 0;
 739                         stypes = mgmt_stypes[ift].rx;
 740                         while (stypes) {
 741                                 if (stypes & 1)
 742                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 743                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 744                                 stypes >>= 1;
 745                                 i++;
 746                         }
 747                         nla_nest_end(msg, nl_ftypes);
 748                 }
 749                 nla_nest_end(msg, nl_ifs);
 750         }
 751
 752         return genlmsg_end(msg, hdr);
 753
 754  nla_put_failure:
 755         genlmsg_cancel(msg, hdr);
 756         return -EMSGSIZE;
 757 }
 758
 759 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 760 {
 761         int idx = 0;
 762         int start = cb->args[0];
 763         struct cfg80211_registered_device *dev;
 764
 765         mutex_lock(&cfg80211_mutex);
 766         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 767                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 768                         continue;
 769                 if (++idx <= start)
 770                         continue;
 771                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 772                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 773                                        dev) < 0) {
 774                         idx--;
 775                         break;
 776                 }
 777         }
 778         mutex_unlock(&cfg80211_mutex);
 779
 780         cb->args[0] = idx;
 781
 782         return skb->len;
 783 }
 784
 785 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 786 {
 787         struct sk_buff *msg;
 788         struct cfg80211_registered_device *dev = info->user_ptr[0];
 789
 790         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 791         if (!msg)
 792                 return -ENOMEM;
 793
 794         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 795                 nlmsg_free(msg);
 796                 return -ENOBUFS;
 797         }
 798
 799         return genlmsg_reply(msg, info);
 800 }
 801
 802 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 803         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 804         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 805         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 806         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 807         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 808 };
 809
 810 static int parse_txq_params(struct nlattr *tb[],
 811                             struct ieee80211_txq_params *txq_params)
 812 {
 813         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 814             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 815             !tb[NL80211_TXQ_ATTR_AIFS])
 816                 return -EINVAL;
 817
 818         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 819         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 820         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 821         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 822         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 823
 824         return 0;
 825 }
 826
 827 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 828 {
 829         /*
 830          * You can only set the channel explicitly for AP, mesh
 831          * and WDS type interfaces; all others have their channel
 832          * managed via their respective "establish a connection"
 833          * command (connect, join, ...)
 834          *
 835          * Monitors are special as they are normally slaved to
 836          * whatever else is going on, so they behave as though
 837          * you tried setting the wiphy channel itself.
 838          */
 839         return !wdev ||
 840                 wdev->iftype == NL80211_IFTYPE_AP ||
 841                 wdev->iftype == NL80211_IFTYPE_WDS ||
 842                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 843                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
 844                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
 845 }
 846
 847 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 848                                  struct wireless_dev *wdev,
 849                                  struct genl_info *info)
 850 {
 851         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 852         u32 freq;
 853         int result;
 854
 855         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 856                 return -EINVAL;
 857
 858         if (!nl80211_can_set_dev_channel(wdev))
 859                 return -EOPNOTSUPP;
 860
 861         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 862                 channel_type = nla_get_u32(info->attrs[
 863                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 864                 if (channel_type != NL80211_CHAN_NO_HT &&
 865                     channel_type != NL80211_CHAN_HT20 &&
 866                     channel_type != NL80211_CHAN_HT40PLUS &&
 867                     channel_type != NL80211_CHAN_HT40MINUS)
 868                         return -EINVAL;
 869         }
 870
 871         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 872
 873         mutex_lock(&rdev->devlist_mtx);
 874         if (wdev) {
 875                 wdev_lock(wdev);
 876                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 877                 wdev_unlock(wdev);
 878         } else {
 879                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 880         }
 881         mutex_unlock(&rdev->devlist_mtx);
 882
 883         return result;
 884 }
 885
 886 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 887 {
 888         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 889         struct net_device *netdev = info->user_ptr[1];
 890
 891         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 892 }
 893
 894 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
 895 {
 896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 897         struct net_device *dev = info->user_ptr[1];
 898         struct wireless_dev *wdev = dev->ieee80211_ptr;
 899         const u8 *bssid;
 900
 901         if (!info->attrs[NL80211_ATTR_MAC])
 902                 return -EINVAL;
 903
 904         if (netif_running(dev))
 905                 return -EBUSY;
 906
 907         if (!rdev->ops->set_wds_peer)
 908                 return -EOPNOTSUPP;
 909
 910         if (wdev->iftype != NL80211_IFTYPE_WDS)
 911                 return -EOPNOTSUPP;
 912
 913         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 914         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
 915 }
 916
 917
 918 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 919 {
 920         struct cfg80211_registered_device *rdev;
 921         struct net_device *netdev = NULL;
 922         struct wireless_dev *wdev;
 923         int result = 0, rem_txq_params = 0;
 924         struct nlattr *nl_txq_params;
 925         u32 changed;
 926         u8 retry_short = 0, retry_long = 0;
 927         u32 frag_threshold = 0, rts_threshold = 0;
 928         u8 coverage_class = 0;
 929
 930         /*
 931          * Try to find the wiphy and netdev. Normally this
 932          * function shouldn't need the netdev, but this is
 933          * done for backward compatibility -- previously
 934          * setting the channel was done per wiphy, but now
 935          * it is per netdev. Previous userland like hostapd
 936          * also passed a netdev to set_wiphy, so that it is
 937          * possible to let that go to the right netdev!
 938          */
 939         mutex_lock(&cfg80211_mutex);
 940
 941         if (info->attrs[NL80211_ATTR_IFINDEX]) {
 942                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
 943
 944                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
 945                 if (netdev && netdev->ieee80211_ptr) {
 946                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
 947                         mutex_lock(&rdev->mtx);
 948                 } else
 949                         netdev = NULL;
 950         }
 951
 952         if (!netdev) {
 953                 rdev = __cfg80211_rdev_from_info(info);
 954                 if (IS_ERR(rdev)) {
 955                         mutex_unlock(&cfg80211_mutex);
 956                         return PTR_ERR(rdev);
 957                 }
 958                 wdev = NULL;
 959                 netdev = NULL;
 960                 result = 0;
 961
 962                 mutex_lock(&rdev->mtx);
 963         } else if (netif_running(netdev) &&
 964                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
 965                 wdev = netdev->ieee80211_ptr;
 966         else
 967                 wdev = NULL;
 968
 969         /*
 970          * end workaround code, by now the rdev is available
 971          * and locked, and wdev may or may not be NULL.
 972          */
 973
 974         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 975                 result = cfg80211_dev_rename(
 976                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 977
 978         mutex_unlock(&cfg80211_mutex);
 979
 980         if (result)
 981                 goto bad_res;
 982
 983         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 984                 struct ieee80211_txq_params txq_params;
 985                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 986
 987                 if (!rdev->ops->set_txq_params) {
 988                         result = -EOPNOTSUPP;
 989                         goto bad_res;
 990                 }
 991
 992                 nla_for_each_nested(nl_txq_params,
 993                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 994                                     rem_txq_params) {
 995                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 996                                   nla_data(nl_txq_params),
 997                                   nla_len(nl_txq_params),
 998                                   txq_params_policy);
 999                         result = parse_txq_params(tb, &txq_params);
1000                         if (result)
1001                                 goto bad_res;
1002
1003                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1004                                                            &txq_params);
1005                         if (result)
1006                                 goto bad_res;
1007                 }
1008         }
1009
1010         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1011                 result = __nl80211_set_channel(rdev, wdev, info);
1012                 if (result)
1013                         goto bad_res;
1014         }
1015
1016         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1017                 enum nl80211_tx_power_setting type;
1018                 int idx, mbm = 0;
1019
1020                 if (!rdev->ops->set_tx_power) {
1021                         result = -EOPNOTSUPP;
1022                         goto bad_res;
1023                 }
1024
1025                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1026                 type = nla_get_u32(info->attrs[idx]);
1027
1028                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1029                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1030                         result = -EINVAL;
1031                         goto bad_res;
1032                 }
1033
1034                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1035                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1036                         mbm = nla_get_u32(info->attrs[idx]);
1037                 }
1038
1039                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1040                 if (result)
1041                         goto bad_res;
1042         }
1043
1044         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1045             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1046                 u32 tx_ant, rx_ant;
1047                 if (!rdev->ops->set_antenna) {
1048                         result = -EOPNOTSUPP;
1049                         goto bad_res;
1050                 }
1051
1052                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1053                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1054
1055                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1056                 if (result)
1057                         goto bad_res;
1058         }
1059
1060         changed = 0;
1061
1062         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1063                 retry_short = nla_get_u8(
1064                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1065                 if (retry_short == 0) {
1066                         result = -EINVAL;
1067                         goto bad_res;
1068                 }
1069                 changed |= WIPHY_PARAM_RETRY_SHORT;
1070         }
1071
1072         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1073                 retry_long = nla_get_u8(
1074                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1075                 if (retry_long == 0) {
1076                         result = -EINVAL;
1077                         goto bad_res;
1078                 }
1079                 changed |= WIPHY_PARAM_RETRY_LONG;
1080         }
1081
1082         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1083                 frag_threshold = nla_get_u32(
1084                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1085                 if (frag_threshold < 256) {
1086                         result = -EINVAL;
1087                         goto bad_res;
1088                 }
1089                 if (frag_threshold != (u32) -1) {
1090                         /*
1091                          * Fragments (apart from the last one) are required to
1092                          * have even length. Make the fragmentation code
1093                          * simpler by stripping LSB should someone try to use
1094                          * odd threshold value.
1095                          */
1096                         frag_threshold &= ~0x1;
1097                 }
1098                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1099         }
1100
1101         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1102                 rts_threshold = nla_get_u32(
1103                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1104                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1105         }
1106
1107         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1108                 coverage_class = nla_get_u8(
1109                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1110                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1111         }
1112
1113         if (changed) {
1114                 u8 old_retry_short, old_retry_long;
1115                 u32 old_frag_threshold, old_rts_threshold;
1116                 u8 old_coverage_class;
1117
1118                 if (!rdev->ops->set_wiphy_params) {
1119                         result = -EOPNOTSUPP;
1120                         goto bad_res;
1121                 }
1122
1123                 old_retry_short = rdev->wiphy.retry_short;
1124                 old_retry_long = rdev->wiphy.retry_long;
1125                 old_frag_threshold = rdev->wiphy.frag_threshold;
1126                 old_rts_threshold = rdev->wiphy.rts_threshold;
1127                 old_coverage_class = rdev->wiphy.coverage_class;
1128
1129                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1130                         rdev->wiphy.retry_short = retry_short;
1131                 if (changed & WIPHY_PARAM_RETRY_LONG)
1132                         rdev->wiphy.retry_long = retry_long;
1133                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1134                         rdev->wiphy.frag_threshold = frag_threshold;
1135                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1136                         rdev->wiphy.rts_threshold = rts_threshold;
1137                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1138                         rdev->wiphy.coverage_class = coverage_class;
1139
1140                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1141                 if (result) {
1142                         rdev->wiphy.retry_short = old_retry_short;
1143                         rdev->wiphy.retry_long = old_retry_long;
1144                         rdev->wiphy.frag_threshold = old_frag_threshold;
1145                         rdev->wiphy.rts_threshold = old_rts_threshold;
1146                         rdev->wiphy.coverage_class = old_coverage_class;
1147                 }
1148         }
1149
1150  bad_res:
1151         mutex_unlock(&rdev->mtx);
1152         if (netdev)
1153                 dev_put(netdev);
1154         return result;
1155 }
1156
1157
1158 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1159                               struct cfg80211_registered_device *rdev,
1160                               struct net_device *dev)
1161 {
1162         void *hdr;
1163
1164         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1165         if (!hdr)
1166                 return -1;
1167
1168         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1169         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1170         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1171         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1172
1173         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1174                     rdev->devlist_generation ^
1175                         (cfg80211_rdev_list_generation << 2));
1176
1177         return genlmsg_end(msg, hdr);
1178
1179  nla_put_failure:
1180         genlmsg_cancel(msg, hdr);
1181         return -EMSGSIZE;
1182 }
1183
1184 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1185 {
1186         int wp_idx = 0;
1187         int if_idx = 0;
1188         int wp_start = cb->args[0];
1189         int if_start = cb->args[1];
1190         struct cfg80211_registered_device *rdev;
1191         struct wireless_dev *wdev;
1192
1193         mutex_lock(&cfg80211_mutex);
1194         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1195                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1196                         continue;
1197                 if (wp_idx < wp_start) {
1198                         wp_idx++;
1199                         continue;
1200                 }
1201                 if_idx = 0;
1202
1203                 mutex_lock(&rdev->devlist_mtx);
1204                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1205                         if (if_idx < if_start) {
1206                                 if_idx++;
1207                                 continue;
1208                         }
1209                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1210                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1211                                                rdev, wdev->netdev) < 0) {
1212                                 mutex_unlock(&rdev->devlist_mtx);
1213                                 goto out;
1214                         }
1215                         if_idx++;
1216                 }
1217                 mutex_unlock(&rdev->devlist_mtx);
1218
1219                 wp_idx++;
1220         }
1221  out:
1222         mutex_unlock(&cfg80211_mutex);
1223
1224         cb->args[0] = wp_idx;
1225         cb->args[1] = if_idx;
1226
1227         return skb->len;
1228 }
1229
1230 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1231 {
1232         struct sk_buff *msg;
1233         struct cfg80211_registered_device *dev = info->user_ptr[0];
1234         struct net_device *netdev = info->user_ptr[1];
1235
1236         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1237         if (!msg)
1238                 return -ENOMEM;
1239
1240         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1241                                dev, netdev) < 0) {
1242                 nlmsg_free(msg);
1243                 return -ENOBUFS;
1244         }
1245
1246         return genlmsg_reply(msg, info);
1247 }
1248
1249 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1250         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1251         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1252         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1253         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1254         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1255 };
1256
1257 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1258 {
1259         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1260         int flag;
1261
1262         *mntrflags = 0;
1263
1264         if (!nla)
1265                 return -EINVAL;
1266
1267         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1268                              nla, mntr_flags_policy))
1269                 return -EINVAL;
1270
1271         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1272                 if (flags[flag])
1273                         *mntrflags |= (1<<flag);
1274
1275         return 0;
1276 }
1277
1278 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1279                                struct net_device *netdev, u8 use_4addr,
1280                                enum nl80211_iftype iftype)
1281 {
1282         if (!use_4addr) {
1283                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1284                         return -EBUSY;
1285                 return 0;
1286         }
1287
1288         switch (iftype) {
1289         case NL80211_IFTYPE_AP_VLAN:
1290                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1291                         return 0;
1292                 break;
1293         case NL80211_IFTYPE_STATION:
1294                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1295                         return 0;
1296                 break;
1297         default:
1298                 break;
1299         }
1300
1301         return -EOPNOTSUPP;
1302 }
1303
1304 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1305 {
1306         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1307         struct vif_params params;
1308         int err;
1309         enum nl80211_iftype otype, ntype;
1310         struct net_device *dev = info->user_ptr[1];
1311         u32 _flags, *flags = NULL;
1312         bool change = false;
1313
1314         memset(&params, 0, sizeof(params));
1315
1316         otype = ntype = dev->ieee80211_ptr->iftype;
1317
1318         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1319                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1320                 if (otype != ntype)
1321                         change = true;
1322                 if (ntype > NL80211_IFTYPE_MAX)
1323                         return -EINVAL;
1324         }
1325
1326         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1327                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1328                         return -EINVAL;
1329                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1330                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1331                 change = true;
1332         }
1333
1334         if (info->attrs[NL80211_ATTR_4ADDR]) {
1335                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1336                 change = true;
1337                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1338                 if (err)
1339                         return err;
1340         } else {
1341                 params.use_4addr = -1;
1342         }
1343
1344         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1345                 if (ntype != NL80211_IFTYPE_MONITOR)
1346                         return -EINVAL;
1347                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1348                                           &_flags);
1349                 if (err)
1350                         return err;
1351
1352                 flags = &_flags;
1353                 change = true;
1354         }
1355
1356         if (change)
1357                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1358         else
1359                 err = 0;
1360
1361         if (!err && params.use_4addr != -1)
1362                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1363
1364         return err;
1365 }
1366
1367 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1368 {
1369         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1370         struct vif_params params;
1371         int err;
1372         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1373         u32 flags;
1374
1375         memset(&params, 0, sizeof(params));
1376
1377         if (!info->attrs[NL80211_ATTR_IFNAME])
1378                 return -EINVAL;
1379
1380         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1381                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1382                 if (type > NL80211_IFTYPE_MAX)
1383                         return -EINVAL;
1384         }
1385
1386         if (!rdev->ops->add_virtual_intf ||
1387             !(rdev->wiphy.interface_modes & (1 << type)))
1388                 return -EOPNOTSUPP;
1389
1390         if (type == NL80211_IFTYPE_MESH_POINT &&
1391             info->attrs[NL80211_ATTR_MESH_ID]) {
1392                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1393                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1394         }
1395
1396         if (info->attrs[NL80211_ATTR_4ADDR]) {
1397                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1398                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1399                 if (err)
1400                         return err;
1401         }
1402
1403         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1404                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1405                                   &flags);
1406         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1407                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1408                 type, err ? NULL : &flags, &params);
1409
1410         return err;
1411 }
1412
1413 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1414 {
1415         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1416         struct net_device *dev = info->user_ptr[1];
1417
1418         if (!rdev->ops->del_virtual_intf)
1419                 return -EOPNOTSUPP;
1420
1421         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1422 }
1423
1424 struct get_key_cookie {
1425         struct sk_buff *msg;
1426         int error;
1427         int idx;
1428 };
1429
1430 static void get_key_callback(void *c, struct key_params *params)
1431 {
1432         struct nlattr *key;
1433         struct get_key_cookie *cookie = c;
1434
1435         if (params->key)
1436                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1437                         params->key_len, params->key);
1438
1439         if (params->seq)
1440                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1441                         params->seq_len, params->seq);
1442
1443         if (params->cipher)
1444                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1445                             params->cipher);
1446
1447         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1448         if (!key)
1449                 goto nla_put_failure;
1450
1451         if (params->key)
1452                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1453                         params->key_len, params->key);
1454
1455         if (params->seq)
1456                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1457                         params->seq_len, params->seq);
1458
1459         if (params->cipher)
1460                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1461                             params->cipher);
1462
1463         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1464
1465         nla_nest_end(cookie->msg, key);
1466
1467         return;
1468  nla_put_failure:
1469         cookie->error = 1;
1470 }
1471
1472 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1473 {
1474         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1475         int err;
1476         struct net_device *dev = info->user_ptr[1];
1477         u8 key_idx = 0;
1478         const u8 *mac_addr = NULL;
1479         bool pairwise;
1480         struct get_key_cookie cookie = {
1481                 .error = 0,
1482         };
1483         void *hdr;
1484         struct sk_buff *msg;
1485
1486         if (info->attrs[NL80211_ATTR_KEY_IDX])
1487                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1488
1489         if (key_idx > 5)
1490                 return -EINVAL;
1491
1492         if (info->attrs[NL80211_ATTR_MAC])
1493                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1494
1495         pairwise = !!mac_addr;
1496         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1497                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1498                 if (kt >= NUM_NL80211_KEYTYPES)
1499                         return -EINVAL;
1500                 if (kt != NL80211_KEYTYPE_GROUP &&
1501                     kt != NL80211_KEYTYPE_PAIRWISE)
1502                         return -EINVAL;
1503                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1504         }
1505
1506         if (!rdev->ops->get_key)
1507                 return -EOPNOTSUPP;
1508
1509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1510         if (!msg)
1511                 return -ENOMEM;
1512
1513         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1514                              NL80211_CMD_NEW_KEY);
1515         if (IS_ERR(hdr))
1516                 return PTR_ERR(hdr);
1517
1518         cookie.msg = msg;
1519         cookie.idx = key_idx;
1520
1521         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1522         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1523         if (mac_addr)
1524                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1525
1526         if (pairwise && mac_addr &&
1527             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1528                 return -ENOENT;
1529
1530         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1531                                  mac_addr, &cookie, get_key_callback);
1532
1533         if (err)
1534                 goto free_msg;
1535
1536         if (cookie.error)
1537                 goto nla_put_failure;
1538
1539         genlmsg_end(msg, hdr);
1540         return genlmsg_reply(msg, info);
1541
1542  nla_put_failure:
1543         err = -ENOBUFS;
1544  free_msg:
1545         nlmsg_free(msg);
1546         return err;
1547 }
1548
1549 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1550 {
1551         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1552         struct key_parse key;
1553         int err;
1554         struct net_device *dev = info->user_ptr[1];
1555         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1556                     u8 key_index);
1557
1558         err = nl80211_parse_key(info, &key);
1559         if (err)
1560                 return err;
1561
1562         if (key.idx < 0)
1563                 return -EINVAL;
1564
1565         /* only support setting default key */
1566         if (!key.def && !key.defmgmt)
1567                 return -EINVAL;
1568
1569         if (key.def)
1570                 func = rdev->ops->set_default_key;
1571         else
1572                 func = rdev->ops->set_default_mgmt_key;
1573
1574         if (!func)
1575                 return -EOPNOTSUPP;
1576
1577         wdev_lock(dev->ieee80211_ptr);
1578         err = nl80211_key_allowed(dev->ieee80211_ptr);
1579         if (!err)
1580                 err = func(&rdev->wiphy, dev, key.idx);
1581
1582 #ifdef CONFIG_CFG80211_WEXT
1583         if (!err) {
1584                 if (func == rdev->ops->set_default_key)
1585                         dev->ieee80211_ptr->wext.default_key = key.idx;
1586                 else
1587                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1588         }
1589 #endif
1590         wdev_unlock(dev->ieee80211_ptr);
1591
1592         return err;
1593 }
1594
1595 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1596 {
1597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1598         int err;
1599         struct net_device *dev = info->user_ptr[1];
1600         struct key_parse key;
1601         const u8 *mac_addr = NULL;
1602
1603         err = nl80211_parse_key(info, &key);
1604         if (err)
1605                 return err;
1606
1607         if (!key.p.key)
1608                 return -EINVAL;
1609
1610         if (info->attrs[NL80211_ATTR_MAC])
1611                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1612
1613         if (key.type == -1) {
1614                 if (mac_addr)
1615                         key.type = NL80211_KEYTYPE_PAIRWISE;
1616                 else
1617                         key.type = NL80211_KEYTYPE_GROUP;
1618         }
1619
1620         /* for now */
1621         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1622             key.type != NL80211_KEYTYPE_GROUP)
1623                 return -EINVAL;
1624
1625         if (!rdev->ops->add_key)
1626                 return -EOPNOTSUPP;
1627
1628         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1629                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1630                                            mac_addr))
1631                 return -EINVAL;
1632
1633         wdev_lock(dev->ieee80211_ptr);
1634         err = nl80211_key_allowed(dev->ieee80211_ptr);
1635         if (!err)
1636                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1637                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1638                                          mac_addr, &key.p);
1639         wdev_unlock(dev->ieee80211_ptr);
1640
1641         return err;
1642 }
1643
1644 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1645 {
1646         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1647         int err;
1648         struct net_device *dev = info->user_ptr[1];
1649         u8 *mac_addr = NULL;
1650         struct key_parse key;
1651
1652         err = nl80211_parse_key(info, &key);
1653         if (err)
1654                 return err;
1655
1656         if (info->attrs[NL80211_ATTR_MAC])
1657                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1658
1659         if (key.type == -1) {
1660                 if (mac_addr)
1661                         key.type = NL80211_KEYTYPE_PAIRWISE;
1662                 else
1663                         key.type = NL80211_KEYTYPE_GROUP;
1664         }
1665
1666         /* for now */
1667         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1668             key.type != NL80211_KEYTYPE_GROUP)
1669                 return -EINVAL;
1670
1671         if (!rdev->ops->del_key)
1672                 return -EOPNOTSUPP;
1673
1674         wdev_lock(dev->ieee80211_ptr);
1675         err = nl80211_key_allowed(dev->ieee80211_ptr);
1676
1677         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1678             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1679                 err = -ENOENT;
1680
1681         if (!err)
1682                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1683                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1684                                          mac_addr);
1685
1686 #ifdef CONFIG_CFG80211_WEXT
1687         if (!err) {
1688                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1689                         dev->ieee80211_ptr->wext.default_key = -1;
1690                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1691                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1692         }
1693 #endif
1694         wdev_unlock(dev->ieee80211_ptr);
1695
1696         return err;
1697 }
1698
1699 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1700 {
1701         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1702                     struct beacon_parameters *info);
1703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1704         struct net_device *dev = info->user_ptr[1];
1705         struct beacon_parameters params;
1706         int haveinfo = 0;
1707
1708         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1709                 return -EINVAL;
1710
1711         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1712             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1713                 return -EOPNOTSUPP;
1714
1715         switch (info->genlhdr->cmd) {
1716         case NL80211_CMD_NEW_BEACON:
1717                 /* these are required for NEW_BEACON */
1718                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1719                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1720                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1721                         return -EINVAL;
1722
1723                 call = rdev->ops->add_beacon;
1724                 break;
1725         case NL80211_CMD_SET_BEACON:
1726                 call = rdev->ops->set_beacon;
1727                 break;
1728         default:
1729                 WARN_ON(1);
1730                 return -EOPNOTSUPP;
1731         }
1732
1733         if (!call)
1734                 return -EOPNOTSUPP;
1735
1736         memset(&params, 0, sizeof(params));
1737
1738         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1739                 params.interval =
1740                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1741                 haveinfo = 1;
1742         }
1743
1744         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1745                 params.dtim_period =
1746                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1747                 haveinfo = 1;
1748         }
1749
1750         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1751                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1752                 params.head_len =
1753                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1754                 haveinfo = 1;
1755         }
1756
1757         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1758                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1759                 params.tail_len =
1760                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1761                 haveinfo = 1;
1762         }
1763
1764         if (!haveinfo)
1765                 return -EINVAL;
1766
1767         return call(&rdev->wiphy, dev, &params);
1768 }
1769
1770 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1771 {
1772         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1773         struct net_device *dev = info->user_ptr[1];
1774
1775         if (!rdev->ops->del_beacon)
1776                 return -EOPNOTSUPP;
1777
1778         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1779             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1780                 return -EOPNOTSUPP;
1781
1782         return rdev->ops->del_beacon(&rdev->wiphy, dev);
1783 }
1784
1785 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1786         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1787         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1788         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1789         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1790 };
1791
1792 static int parse_station_flags(struct genl_info *info,
1793                                struct station_parameters *params)
1794 {
1795         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1796         struct nlattr *nla;
1797         int flag;
1798
1799         /*
1800          * Try parsing the new attribute first so userspace
1801          * can specify both for older kernels.
1802          */
1803         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1804         if (nla) {
1805                 struct nl80211_sta_flag_update *sta_flags;
1806
1807                 sta_flags = nla_data(nla);
1808                 params->sta_flags_mask = sta_flags->mask;
1809                 params->sta_flags_set = sta_flags->set;
1810                 if ((params->sta_flags_mask |
1811                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1812                         return -EINVAL;
1813                 return 0;
1814         }
1815
1816         /* if present, parse the old attribute */
1817
1818         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1819         if (!nla)
1820                 return 0;
1821
1822         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1823                              nla, sta_flags_policy))
1824                 return -EINVAL;
1825
1826         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1827         params->sta_flags_mask &= ~1;
1828
1829         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1830                 if (flags[flag])
1831                         params->sta_flags_set |= (1<<flag);
1832
1833         return 0;
1834 }
1835
1836 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1837                                 int flags, struct net_device *dev,
1838                                 const u8 *mac_addr, struct station_info *sinfo)
1839 {
1840         void *hdr;
1841         struct nlattr *sinfoattr, *txrate;
1842         u16 bitrate;
1843
1844         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1845         if (!hdr)
1846                 return -1;
1847
1848         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1849         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1850
1851         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1852
1853         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1854         if (!sinfoattr)
1855                 goto nla_put_failure;
1856         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1857                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1858                             sinfo->inactive_time);
1859         if (sinfo->filled & STATION_INFO_RX_BYTES)
1860                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1861                             sinfo->rx_bytes);
1862         if (sinfo->filled & STATION_INFO_TX_BYTES)
1863                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1864                             sinfo->tx_bytes);
1865         if (sinfo->filled & STATION_INFO_LLID)
1866                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1867                             sinfo->llid);
1868         if (sinfo->filled & STATION_INFO_PLID)
1869                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1870                             sinfo->plid);
1871         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1872                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1873                             sinfo->plink_state);
1874         if (sinfo->filled & STATION_INFO_SIGNAL)
1875                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1876                            sinfo->signal);
1877         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1878                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1879                 if (!txrate)
1880                         goto nla_put_failure;
1881
1882                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1883                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1884                 if (bitrate > 0)
1885                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1886
1887                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1888                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1889                                     sinfo->txrate.mcs);
1890                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1891                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1892                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1893                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1894
1895                 nla_nest_end(msg, txrate);
1896         }
1897         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1898                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1899                             sinfo->rx_packets);
1900         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1901                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1902                             sinfo->tx_packets);
1903         if (sinfo->filled & STATION_INFO_TX_RETRIES)
1904                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
1905                             sinfo->tx_retries);
1906         if (sinfo->filled & STATION_INFO_TX_FAILED)
1907                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
1908                             sinfo->tx_failed);
1909         nla_nest_end(msg, sinfoattr);
1910
1911         return genlmsg_end(msg, hdr);
1912
1913  nla_put_failure:
1914         genlmsg_cancel(msg, hdr);
1915         return -EMSGSIZE;
1916 }
1917
1918 static int nl80211_dump_station(struct sk_buff *skb,
1919                                 struct netlink_callback *cb)
1920 {
1921         struct station_info sinfo;
1922         struct cfg80211_registered_device *dev;
1923         struct net_device *netdev;
1924         u8 mac_addr[ETH_ALEN];
1925         int sta_idx = cb->args[1];
1926         int err;
1927
1928         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
1929         if (err)
1930                 return err;
1931
1932         if (!dev->ops->dump_station) {
1933                 err = -EOPNOTSUPP;
1934                 goto out_err;
1935         }
1936
1937         while (1) {
1938                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1939                                              mac_addr, &sinfo);
1940                 if (err == -ENOENT)
1941                         break;
1942                 if (err)
1943                         goto out_err;
1944
1945                 if (nl80211_send_station(skb,
1946                                 NETLINK_CB(cb->skb).pid,
1947                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1948                                 netdev, mac_addr,
1949                                 &sinfo) < 0)
1950                         goto out;
1951
1952                 sta_idx++;
1953         }
1954
1955
1956  out:
1957         cb->args[1] = sta_idx;
1958         err = skb->len;
1959  out_err:
1960         nl80211_finish_netdev_dump(dev);
1961
1962         return err;
1963 }
1964
1965 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1966 {
1967         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1968         struct net_device *dev = info->user_ptr[1];
1969         struct station_info sinfo;
1970         struct sk_buff *msg;
1971         u8 *mac_addr = NULL;
1972         int err;
1973
1974         memset(&sinfo, 0, sizeof(sinfo));
1975
1976         if (!info->attrs[NL80211_ATTR_MAC])
1977                 return -EINVAL;
1978
1979         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1980
1981         if (!rdev->ops->get_station)
1982                 return -EOPNOTSUPP;
1983
1984         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1985         if (err)
1986                 return err;
1987
1988         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1989         if (!msg)
1990                 return -ENOMEM;
1991
1992         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1993                                  dev, mac_addr, &sinfo) < 0) {
1994                 nlmsg_free(msg);
1995                 return -ENOBUFS;
1996         }
1997
1998         return genlmsg_reply(msg, info);
1999 }
2000
2001 /*
2002  * Get vlan interface making sure it is running and on the right wiphy.
2003  */
2004 static int get_vlan(struct genl_info *info,
2005                     struct cfg80211_registered_device *rdev,
2006                     struct net_device **vlan)
2007 {
2008         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2009         *vlan = NULL;
2010
2011         if (vlanattr) {
2012                 *vlan = dev_get_by_index(genl_info_net(info),
2013                                          nla_get_u32(vlanattr));
2014                 if (!*vlan)
2015                         return -ENODEV;
2016                 if (!(*vlan)->ieee80211_ptr)
2017                         return -EINVAL;
2018                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2019                         return -EINVAL;
2020                 if (!netif_running(*vlan))
2021                         return -ENETDOWN;
2022         }
2023         return 0;
2024 }
2025
2026 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2027 {
2028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2029         int err;
2030         struct net_device *dev = info->user_ptr[1];
2031         struct station_parameters params;
2032         u8 *mac_addr = NULL;
2033
2034         memset(&params, 0, sizeof(params));
2035
2036         params.listen_interval = -1;
2037
2038         if (info->attrs[NL80211_ATTR_STA_AID])
2039                 return -EINVAL;
2040
2041         if (!info->attrs[NL80211_ATTR_MAC])
2042                 return -EINVAL;
2043
2044         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2045
2046         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2047                 params.supported_rates =
2048                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2049                 params.supported_rates_len =
2050                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2051         }
2052
2053         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2054                 params.listen_interval =
2055                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2056
2057         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2058                 params.ht_capa =
2059                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2060
2061         if (parse_station_flags(info, &params))
2062                 return -EINVAL;
2063
2064         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2065                 params.plink_action =
2066                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2067
2068         err = get_vlan(info, rdev, &params.vlan);
2069         if (err)
2070                 goto out;
2071
2072         /* validate settings */
2073         err = 0;
2074
2075         switch (dev->ieee80211_ptr->iftype) {
2076         case NL80211_IFTYPE_AP:
2077         case NL80211_IFTYPE_AP_VLAN:
2078         case NL80211_IFTYPE_P2P_GO:
2079                 /* disallow mesh-specific things */
2080                 if (params.plink_action)
2081                         err = -EINVAL;
2082                 break;
2083         case NL80211_IFTYPE_P2P_CLIENT:
2084         case NL80211_IFTYPE_STATION:
2085                 /* disallow everything but AUTHORIZED flag */
2086                 if (params.plink_action)
2087                         err = -EINVAL;
2088                 if (params.vlan)
2089                         err = -EINVAL;
2090                 if (params.supported_rates)
2091                         err = -EINVAL;
2092                 if (params.ht_capa)
2093                         err = -EINVAL;
2094                 if (params.listen_interval >= 0)
2095                         err = -EINVAL;
2096                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2097                         err = -EINVAL;
2098                 break;
2099         case NL80211_IFTYPE_MESH_POINT:
2100                 /* disallow things mesh doesn't support */
2101                 if (params.vlan)
2102                         err = -EINVAL;
2103                 if (params.ht_capa)
2104                         err = -EINVAL;
2105                 if (params.listen_interval >= 0)
2106                         err = -EINVAL;
2107                 if (params.supported_rates)
2108                         err = -EINVAL;
2109                 if (params.sta_flags_mask)
2110                         err = -EINVAL;
2111                 break;
2112         default:
2113                 err = -EINVAL;
2114         }
2115
2116         if (err)
2117                 goto out;
2118
2119         if (!rdev->ops->change_station) {
2120                 err = -EOPNOTSUPP;
2121                 goto out;
2122         }
2123
2124         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2125
2126  out:
2127         if (params.vlan)
2128                 dev_put(params.vlan);
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 = info->user_ptr[0];
2136         int err;
2137         struct net_device *dev = info->user_ptr[1];
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         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2175             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2176             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2177                 return -EINVAL;
2178
2179         err = get_vlan(info, rdev, &params.vlan);
2180         if (err)
2181                 goto out;
2182
2183         /* validate settings */
2184         err = 0;
2185
2186         if (!rdev->ops->add_station) {
2187                 err = -EOPNOTSUPP;
2188                 goto out;
2189         }
2190
2191         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2192
2193  out:
2194         if (params.vlan)
2195                 dev_put(params.vlan);
2196         return err;
2197 }
2198
2199 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2200 {
2201         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2202         struct net_device *dev = info->user_ptr[1];
2203         u8 *mac_addr = NULL;
2204
2205         if (info->attrs[NL80211_ATTR_MAC])
2206                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2207
2208         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2209             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2210             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2211             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2212                 return -EINVAL;
2213
2214         if (!rdev->ops->del_station)
2215                 return -EOPNOTSUPP;
2216
2217         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2218 }
2219
2220 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2221                                 int flags, struct net_device *dev,
2222                                 u8 *dst, u8 *next_hop,
2223                                 struct mpath_info *pinfo)
2224 {
2225         void *hdr;
2226         struct nlattr *pinfoattr;
2227
2228         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2229         if (!hdr)
2230                 return -1;
2231
2232         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2233         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2234         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2235
2236         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2237
2238         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2239         if (!pinfoattr)
2240                 goto nla_put_failure;
2241         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2242                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2243                             pinfo->frame_qlen);
2244         if (pinfo->filled & MPATH_INFO_SN)
2245                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2246                             pinfo->sn);
2247         if (pinfo->filled & MPATH_INFO_METRIC)
2248                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2249                             pinfo->metric);
2250         if (pinfo->filled & MPATH_INFO_EXPTIME)
2251                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2252                             pinfo->exptime);
2253         if (pinfo->filled & MPATH_INFO_FLAGS)
2254                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2255                             pinfo->flags);
2256         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2257                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2258                             pinfo->discovery_timeout);
2259         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2260                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2261                             pinfo->discovery_retries);
2262
2263         nla_nest_end(msg, pinfoattr);
2264
2265         return genlmsg_end(msg, hdr);
2266
2267  nla_put_failure:
2268         genlmsg_cancel(msg, hdr);
2269         return -EMSGSIZE;
2270 }
2271
2272 static int nl80211_dump_mpath(struct sk_buff *skb,
2273                               struct netlink_callback *cb)
2274 {
2275         struct mpath_info pinfo;
2276         struct cfg80211_registered_device *dev;
2277         struct net_device *netdev;
2278         u8 dst[ETH_ALEN];
2279         u8 next_hop[ETH_ALEN];
2280         int path_idx = cb->args[1];
2281         int err;
2282
2283         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2284         if (err)
2285                 return err;
2286
2287         if (!dev->ops->dump_mpath) {
2288                 err = -EOPNOTSUPP;
2289                 goto out_err;
2290         }
2291
2292         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2293                 err = -EOPNOTSUPP;
2294                 goto out_err;
2295         }
2296
2297         while (1) {
2298                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2299                                            dst, next_hop, &pinfo);
2300                 if (err == -ENOENT)
2301                         break;
2302                 if (err)
2303                         goto out_err;
2304
2305                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2306                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2307                                        netdev, dst, next_hop,
2308                                        &pinfo) < 0)
2309                         goto out;
2310
2311                 path_idx++;
2312         }
2313
2314
2315  out:
2316         cb->args[1] = path_idx;
2317         err = skb->len;
2318  out_err:
2319         nl80211_finish_netdev_dump(dev);
2320         return err;
2321 }
2322
2323 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2324 {
2325         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2326         int err;
2327         struct net_device *dev = info->user_ptr[1];
2328         struct mpath_info pinfo;
2329         struct sk_buff *msg;
2330         u8 *dst = NULL;
2331         u8 next_hop[ETH_ALEN];
2332
2333         memset(&pinfo, 0, sizeof(pinfo));
2334
2335         if (!info->attrs[NL80211_ATTR_MAC])
2336                 return -EINVAL;
2337
2338         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2339
2340         if (!rdev->ops->get_mpath)
2341                 return -EOPNOTSUPP;
2342
2343         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2344                 return -EOPNOTSUPP;
2345
2346         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2347         if (err)
2348                 return err;
2349
2350         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2351         if (!msg)
2352                 return -ENOMEM;
2353
2354         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2355                                  dev, dst, next_hop, &pinfo) < 0) {
2356                 nlmsg_free(msg);
2357                 return -ENOBUFS;
2358         }
2359
2360         return genlmsg_reply(msg, info);
2361 }
2362
2363 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2364 {
2365         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2366         struct net_device *dev = info->user_ptr[1];
2367         u8 *dst = NULL;
2368         u8 *next_hop = NULL;
2369
2370         if (!info->attrs[NL80211_ATTR_MAC])
2371                 return -EINVAL;
2372
2373         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2374                 return -EINVAL;
2375
2376         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2377         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2378
2379         if (!rdev->ops->change_mpath)
2380                 return -EOPNOTSUPP;
2381
2382         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2383                 return -EOPNOTSUPP;
2384
2385         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2386 }
2387
2388 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2389 {
2390         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2391         struct net_device *dev = info->user_ptr[1];
2392         u8 *dst = NULL;
2393         u8 *next_hop = NULL;
2394
2395         if (!info->attrs[NL80211_ATTR_MAC])
2396                 return -EINVAL;
2397
2398         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2399                 return -EINVAL;
2400
2401         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2402         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2403
2404         if (!rdev->ops->add_mpath)
2405                 return -EOPNOTSUPP;
2406
2407         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2408                 return -EOPNOTSUPP;
2409
2410         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2411 }
2412
2413 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2414 {
2415         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2416         struct net_device *dev = info->user_ptr[1];
2417         u8 *dst = NULL;
2418
2419         if (info->attrs[NL80211_ATTR_MAC])
2420                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2421
2422         if (!rdev->ops->del_mpath)
2423                 return -EOPNOTSUPP;
2424
2425         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2426 }
2427
2428 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2429 {
2430         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2431         struct net_device *dev = info->user_ptr[1];
2432         struct bss_parameters params;
2433
2434         memset(&params, 0, sizeof(params));
2435         /* default to not changing parameters */
2436         params.use_cts_prot = -1;
2437         params.use_short_preamble = -1;
2438         params.use_short_slot_time = -1;
2439         params.ap_isolate = -1;
2440
2441         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2442                 params.use_cts_prot =
2443                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2444         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2445                 params.use_short_preamble =
2446                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2447         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2448                 params.use_short_slot_time =
2449                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2450         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2451                 params.basic_rates =
2452                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2453                 params.basic_rates_len =
2454                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2455         }
2456         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2457                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2458
2459         if (!rdev->ops->change_bss)
2460                 return -EOPNOTSUPP;
2461
2462         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2463             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2464                 return -EOPNOTSUPP;
2465
2466         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2467 }
2468
2469 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2470         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2471         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2472         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2473         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2474         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2475         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2476 };
2477
2478 static int parse_reg_rule(struct nlattr *tb[],
2479         struct ieee80211_reg_rule *reg_rule)
2480 {
2481         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2482         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2483
2484         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2485                 return -EINVAL;
2486         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2487                 return -EINVAL;
2488         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2489                 return -EINVAL;
2490         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2491                 return -EINVAL;
2492         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2493                 return -EINVAL;
2494
2495         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2496
2497         freq_range->start_freq_khz =
2498                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2499         freq_range->end_freq_khz =
2500                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2501         freq_range->max_bandwidth_khz =
2502                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2503
2504         power_rule->max_eirp =
2505                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2506
2507         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2508                 power_rule->max_antenna_gain =
2509                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2510
2511         return 0;
2512 }
2513
2514 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2515 {
2516         int r;
2517         char *data = NULL;
2518
2519         /*
2520          * You should only get this when cfg80211 hasn't yet initialized
2521          * completely when built-in to the kernel right between the time
2522          * window between nl80211_init() and regulatory_init(), if that is
2523          * even possible.
2524          */
2525         mutex_lock(&cfg80211_mutex);
2526         if (unlikely(!cfg80211_regdomain)) {
2527                 mutex_unlock(&cfg80211_mutex);
2528                 return -EINPROGRESS;
2529         }
2530         mutex_unlock(&cfg80211_mutex);
2531
2532         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2533                 return -EINVAL;
2534
2535         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2536
2537         r = regulatory_hint_user(data);
2538
2539         return r;
2540 }
2541
2542 static int nl80211_get_mesh_params(struct sk_buff *skb,
2543         struct genl_info *info)
2544 {
2545         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2546         struct mesh_config cur_params;
2547         int err;
2548         struct net_device *dev = info->user_ptr[1];
2549         void *hdr;
2550         struct nlattr *pinfoattr;
2551         struct sk_buff *msg;
2552
2553         if (!rdev->ops->get_mesh_params)
2554                 return -EOPNOTSUPP;
2555
2556         /* Get the mesh params */
2557         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2558         if (err)
2559                 return err;
2560
2561         /* Draw up a netlink message to send back */
2562         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2563         if (!msg)
2564                 return -ENOMEM;
2565         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2566                              NL80211_CMD_GET_MESH_PARAMS);
2567         if (!hdr)
2568                 goto nla_put_failure;
2569         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2570         if (!pinfoattr)
2571                 goto nla_put_failure;
2572         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2573         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2574                         cur_params.dot11MeshRetryTimeout);
2575         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2576                         cur_params.dot11MeshConfirmTimeout);
2577         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2578                         cur_params.dot11MeshHoldingTimeout);
2579         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2580                         cur_params.dot11MeshMaxPeerLinks);
2581         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2582                         cur_params.dot11MeshMaxRetries);
2583         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2584                         cur_params.dot11MeshTTL);
2585         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2586                         cur_params.auto_open_plinks);
2587         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2588                         cur_params.dot11MeshHWMPmaxPREQretries);
2589         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2590                         cur_params.path_refresh_time);
2591         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2592                         cur_params.min_discovery_timeout);
2593         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2594                         cur_params.dot11MeshHWMPactivePathTimeout);
2595         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2596                         cur_params.dot11MeshHWMPpreqMinInterval);
2597         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2598                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2599         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2600                         cur_params.dot11MeshHWMPRootMode);
2601         nla_nest_end(msg, pinfoattr);
2602         genlmsg_end(msg, hdr);
2603         return genlmsg_reply(msg, info);
2604
2605  nla_put_failure:
2606         genlmsg_cancel(msg, hdr);
2607         nlmsg_free(msg);
2608         return -ENOBUFS;
2609 }
2610
2611 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2612 do {\
2613         if (table[attr_num]) {\
2614                 cfg.param = nla_fn(table[attr_num]); \
2615                 mask |= (1 << (attr_num - 1)); \
2616         } \
2617 } while (0);\
2618
2619 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2620         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2621         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2622         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2623         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2624         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2625         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2626         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2627
2628         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2629         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2630         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2631         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2632         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2633         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2634 };
2635
2636 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2637 {
2638         u32 mask;
2639         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2640         struct net_device *dev = info->user_ptr[1];
2641         struct mesh_config cfg;
2642         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2643         struct nlattr *parent_attr;
2644
2645         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2646         if (!parent_attr)
2647                 return -EINVAL;
2648         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2649                         parent_attr, nl80211_meshconf_params_policy))
2650                 return -EINVAL;
2651
2652         if (!rdev->ops->set_mesh_params)
2653                 return -EOPNOTSUPP;
2654
2655         /* This makes sure that there aren't more than 32 mesh config
2656          * parameters (otherwise our bitfield scheme would not work.) */
2657         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2658
2659         /* Fill in the params struct */
2660         mask = 0;
2661         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2662                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2663         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2664                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2665         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2666                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2667         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2668                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2669         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2670                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2671         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2672                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2673         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2674                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2675         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2676                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2677                         nla_get_u8);
2678         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2679                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2680         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2681                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2682                         nla_get_u16);
2683         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2684                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2685                         nla_get_u32);
2686         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2687                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2688                         nla_get_u16);
2689         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2690                         dot11MeshHWMPnetDiameterTraversalTime,
2691                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2692                         nla_get_u16);
2693         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2694                         dot11MeshHWMPRootMode, mask,
2695                         NL80211_MESHCONF_HWMP_ROOTMODE,
2696                         nla_get_u8);
2697
2698         /* Apply changes */
2699         return rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2700 }
2701
2702 #undef FILL_IN_MESH_PARAM_IF_SET
2703
2704 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2705 {
2706         struct sk_buff *msg;
2707         void *hdr = NULL;
2708         struct nlattr *nl_reg_rules;
2709         unsigned int i;
2710         int err = -EINVAL;
2711
2712         mutex_lock(&cfg80211_mutex);
2713
2714         if (!cfg80211_regdomain)
2715                 goto out;
2716
2717         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2718         if (!msg) {
2719                 err = -ENOBUFS;
2720                 goto out;
2721         }
2722
2723         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2724                              NL80211_CMD_GET_REG);
2725         if (!hdr)
2726                 goto nla_put_failure;
2727
2728         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2729                 cfg80211_regdomain->alpha2);
2730
2731         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2732         if (!nl_reg_rules)
2733                 goto nla_put_failure;
2734
2735         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2736                 struct nlattr *nl_reg_rule;
2737                 const struct ieee80211_reg_rule *reg_rule;
2738                 const struct ieee80211_freq_range *freq_range;
2739                 const struct ieee80211_power_rule *power_rule;
2740
2741                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2742                 freq_range = &reg_rule->freq_range;
2743                 power_rule = &reg_rule->power_rule;
2744
2745                 nl_reg_rule = nla_nest_start(msg, i);
2746                 if (!nl_reg_rule)
2747                         goto nla_put_failure;
2748
2749                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2750                         reg_rule->flags);
2751                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2752                         freq_range->start_freq_khz);
2753                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2754                         freq_range->end_freq_khz);
2755                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2756                         freq_range->max_bandwidth_khz);
2757                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2758                         power_rule->max_antenna_gain);
2759                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2760                         power_rule->max_eirp);
2761
2762                 nla_nest_end(msg, nl_reg_rule);
2763         }
2764
2765         nla_nest_end(msg, nl_reg_rules);
2766
2767         genlmsg_end(msg, hdr);
2768         err = genlmsg_reply(msg, info);
2769         goto out;
2770
2771 nla_put_failure:
2772         genlmsg_cancel(msg, hdr);
2773         nlmsg_free(msg);
2774         err = -EMSGSIZE;
2775 out:
2776         mutex_unlock(&cfg80211_mutex);
2777         return err;
2778 }
2779
2780 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2781 {
2782         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2783         struct nlattr *nl_reg_rule;
2784         char *alpha2 = NULL;
2785         int rem_reg_rules = 0, r = 0;
2786         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2787         struct ieee80211_regdomain *rd = NULL;
2788
2789         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2790                 return -EINVAL;
2791
2792         if (!info->attrs[NL80211_ATTR_REG_RULES])
2793                 return -EINVAL;
2794
2795         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2796
2797         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2798                         rem_reg_rules) {
2799                 num_rules++;
2800                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2801                         return -EINVAL;
2802         }
2803
2804         mutex_lock(&cfg80211_mutex);
2805
2806         if (!reg_is_valid_request(alpha2)) {
2807                 r = -EINVAL;
2808                 goto bad_reg;
2809         }
2810
2811         size_of_regd = sizeof(struct ieee80211_regdomain) +
2812                 (num_rules * sizeof(struct ieee80211_reg_rule));
2813
2814         rd = kzalloc(size_of_regd, GFP_KERNEL);
2815         if (!rd) {
2816                 r = -ENOMEM;
2817                 goto bad_reg;
2818         }
2819
2820         rd->n_reg_rules = num_rules;
2821         rd->alpha2[0] = alpha2[0];
2822         rd->alpha2[1] = alpha2[1];
2823
2824         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2825                         rem_reg_rules) {
2826                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2827                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2828                         reg_rule_policy);
2829                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2830                 if (r)
2831                         goto bad_reg;
2832
2833                 rule_idx++;
2834
2835                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2836                         r = -EINVAL;
2837                         goto bad_reg;
2838                 }
2839         }
2840
2841         BUG_ON(rule_idx != num_rules);
2842
2843         r = set_regdom(rd);
2844
2845         mutex_unlock(&cfg80211_mutex);
2846
2847         return r;
2848
2849  bad_reg:
2850         mutex_unlock(&cfg80211_mutex);
2851         kfree(rd);
2852         return r;
2853 }
2854
2855 static int validate_scan_freqs(struct nlattr *freqs)
2856 {
2857         struct nlattr *attr1, *attr2;
2858         int n_channels = 0, tmp1, tmp2;
2859
2860         nla_for_each_nested(attr1, freqs, tmp1) {
2861                 n_channels++;
2862                 /*
2863                  * Some hardware has a limited channel list for
2864                  * scanning, and it is pretty much nonsensical
2865                  * to scan for a channel twice, so disallow that
2866                  * and don't require drivers to check that the
2867                  * channel list they get isn't longer than what
2868                  * they can scan, as long as they can scan all
2869                  * the channels they registered at once.
2870                  */
2871                 nla_for_each_nested(attr2, freqs, tmp2)
2872                         if (attr1 != attr2 &&
2873                             nla_get_u32(attr1) == nla_get_u32(attr2))
2874                                 return 0;
2875         }
2876
2877         return n_channels;
2878 }
2879
2880 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2881 {
2882         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2883         struct net_device *dev = info->user_ptr[1];
2884         struct cfg80211_scan_request *request;
2885         struct cfg80211_ssid *ssid;
2886         struct ieee80211_channel *channel;
2887         struct nlattr *attr;
2888         struct wiphy *wiphy;
2889         int err, tmp, n_ssids = 0, n_channels, i;
2890         enum ieee80211_band band;
2891         size_t ie_len;
2892
2893         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2894                 return -EINVAL;
2895
2896         wiphy = &rdev->wiphy;
2897
2898         if (!rdev->ops->scan)
2899                 return -EOPNOTSUPP;
2900
2901         if (rdev->scan_req)
2902                 return -EBUSY;
2903
2904         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2905                 n_channels = validate_scan_freqs(
2906                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2907                 if (!n_channels)
2908                         return -EINVAL;
2909         } else {
2910                 n_channels = 0;
2911
2912                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2913                         if (wiphy->bands[band])
2914                                 n_channels += wiphy->bands[band]->n_channels;
2915         }
2916
2917         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2918                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2919                         n_ssids++;
2920
2921         if (n_ssids > wiphy->max_scan_ssids)
2922                 return -EINVAL;
2923
2924         if (info->attrs[NL80211_ATTR_IE])
2925                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2926         else
2927                 ie_len = 0;
2928
2929         if (ie_len > wiphy->max_scan_ie_len)
2930                 return -EINVAL;
2931
2932         request = kzalloc(sizeof(*request)
2933                         + sizeof(*ssid) * n_ssids
2934                         + sizeof(channel) * n_channels
2935                         + ie_len, GFP_KERNEL);
2936         if (!request)
2937                 return -ENOMEM;
2938
2939         if (n_ssids)
2940                 request->ssids = (void *)&request->channels[n_channels];
2941         request->n_ssids = n_ssids;
2942         if (ie_len) {
2943                 if (request->ssids)
2944                         request->ie = (void *)(request->ssids + n_ssids);
2945                 else
2946                         request->ie = (void *)(request->channels + n_channels);
2947         }
2948
2949         i = 0;
2950         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2951                 /* user specified, bail out if channel not found */
2952                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2953                         struct ieee80211_channel *chan;
2954
2955                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2956
2957                         if (!chan) {
2958                                 err = -EINVAL;
2959                                 goto out_free;
2960                         }
2961
2962                         /* ignore disabled channels */
2963                         if (chan->flags & IEEE80211_CHAN_DISABLED)
2964                                 continue;
2965
2966                         request->channels[i] = chan;
2967                         i++;
2968                 }
2969         } else {
2970                 /* all channels */
2971                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2972                         int j;
2973                         if (!wiphy->bands[band])
2974                                 continue;
2975                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2976                                 struct ieee80211_channel *chan;
2977
2978                                 chan = &wiphy->bands[band]->channels[j];
2979
2980                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
2981                                         continue;
2982
2983                                 request->channels[i] = chan;
2984                                 i++;
2985                         }
2986                 }
2987         }
2988
2989         if (!i) {
2990                 err = -EINVAL;
2991                 goto out_free;
2992         }
2993
2994         request->n_channels = i;
2995
2996         i = 0;
2997         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2998                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2999                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3000                                 err = -EINVAL;
3001                                 goto out_free;
3002                         }
3003                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3004                         request->ssids[i].ssid_len = nla_len(attr);
3005                         i++;
3006                 }
3007         }
3008
3009         if (info->attrs[NL80211_ATTR_IE]) {
3010                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3011                 memcpy((void *)request->ie,
3012                        nla_data(info->attrs[NL80211_ATTR_IE]),
3013                        request->ie_len);
3014         }
3015
3016         request->dev = dev;
3017         request->wiphy = &rdev->wiphy;
3018
3019         rdev->scan_req = request;
3020         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3021
3022         if (!err) {
3023                 nl80211_send_scan_start(rdev, dev);
3024                 dev_hold(dev);
3025         } else {
3026  out_free:
3027                 rdev->scan_req = NULL;
3028                 kfree(request);
3029         }
3030
3031         return err;
3032 }
3033
3034 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3035                             struct cfg80211_registered_device *rdev,
3036                             struct wireless_dev *wdev,
3037                             struct cfg80211_internal_bss *intbss)
3038 {
3039         struct cfg80211_bss *res = &intbss->pub;
3040         void *hdr;
3041         struct nlattr *bss;
3042         int i;
3043
3044         ASSERT_WDEV_LOCK(wdev);
3045
3046         hdr = nl80211hdr_put(msg, pid, seq, flags,
3047                              NL80211_CMD_NEW_SCAN_RESULTS);
3048         if (!hdr)
3049                 return -1;
3050
3051         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3052         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3053
3054         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3055         if (!bss)
3056                 goto nla_put_failure;
3057         if (!is_zero_ether_addr(res->bssid))
3058                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3059         if (res->information_elements && res->len_information_elements)
3060                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3061                         res->len_information_elements,
3062                         res->information_elements);
3063         if (res->beacon_ies && res->len_beacon_ies &&
3064             res->beacon_ies != res->information_elements)
3065                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3066                         res->len_beacon_ies, res->beacon_ies);
3067         if (res->tsf)
3068                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3069         if (res->beacon_interval)
3070                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3071         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3072         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3073         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3074                 jiffies_to_msecs(jiffies - intbss->ts));
3075
3076         switch (rdev->wiphy.signal_type) {
3077         case CFG80211_SIGNAL_TYPE_MBM:
3078                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3079                 break;
3080         case CFG80211_SIGNAL_TYPE_UNSPEC:
3081                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3082                 break;
3083         default:
3084                 break;
3085         }
3086
3087         switch (wdev->iftype) {
3088         case NL80211_IFTYPE_P2P_CLIENT:
3089         case NL80211_IFTYPE_STATION:
3090                 if (intbss == wdev->current_bss)
3091                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3092                                     NL80211_BSS_STATUS_ASSOCIATED);
3093                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3094                         if (intbss != wdev->auth_bsses[i])
3095                                 continue;
3096                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3097                                     NL80211_BSS_STATUS_AUTHENTICATED);
3098                         break;
3099                 }
3100                 break;
3101         case NL80211_IFTYPE_ADHOC:
3102                 if (intbss == wdev->current_bss)
3103                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3104                                     NL80211_BSS_STATUS_IBSS_JOINED);
3105                 break;
3106         default:
3107                 break;
3108         }
3109
3110         nla_nest_end(msg, bss);
3111
3112         return genlmsg_end(msg, hdr);
3113
3114  nla_put_failure:
3115         genlmsg_cancel(msg, hdr);
3116         return -EMSGSIZE;
3117 }
3118
3119 static int nl80211_dump_scan(struct sk_buff *skb,
3120                              struct netlink_callback *cb)
3121 {
3122         struct cfg80211_registered_device *rdev;
3123         struct net_device *dev;
3124         struct cfg80211_internal_bss *scan;
3125         struct wireless_dev *wdev;
3126         int start = cb->args[1], idx = 0;
3127         int err;
3128
3129         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3130         if (err)
3131                 return err;
3132
3133         wdev = dev->ieee80211_ptr;
3134
3135         wdev_lock(wdev);
3136         spin_lock_bh(&rdev->bss_lock);
3137         cfg80211_bss_expire(rdev);
3138
3139         list_for_each_entry(scan, &rdev->bss_list, list) {
3140                 if (++idx <= start)
3141                         continue;
3142                 if (nl80211_send_bss(skb,
3143                                 NETLINK_CB(cb->skb).pid,
3144                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3145                                 rdev, wdev, scan) < 0) {
3146                         idx--;
3147                         break;
3148                 }
3149         }
3150
3151         spin_unlock_bh(&rdev->bss_lock);
3152         wdev_unlock(wdev);
3153
3154         cb->args[1] = idx;
3155         nl80211_finish_netdev_dump(rdev);
3156
3157         return skb->len;
3158 }
3159
3160 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3161                                 int flags, struct net_device *dev,
3162                                 struct survey_info *survey)
3163 {
3164         void *hdr;
3165         struct nlattr *infoattr;
3166
3167         /* Survey without a channel doesn't make sense */
3168         if (!survey->channel)
3169                 return -EINVAL;
3170
3171         hdr = nl80211hdr_put(msg, pid, seq, flags,
3172                              NL80211_CMD_NEW_SURVEY_RESULTS);
3173         if (!hdr)
3174                 return -ENOMEM;
3175
3176         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3177
3178         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3179         if (!infoattr)
3180                 goto nla_put_failure;
3181
3182         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3183                     survey->channel->center_freq);
3184         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3185                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3186                             survey->noise);
3187         if (survey->filled & SURVEY_INFO_IN_USE)
3188                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3189         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3190                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3191                             survey->channel_time);
3192         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3193                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3194                             survey->channel_time_busy);
3195         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3196                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3197                             survey->channel_time_ext_busy);
3198         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3199                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3200                             survey->channel_time_rx);
3201         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3202                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3203                             survey->channel_time_tx);
3204
3205         nla_nest_end(msg, infoattr);
3206
3207         return genlmsg_end(msg, hdr);
3208
3209  nla_put_failure:
3210         genlmsg_cancel(msg, hdr);
3211         return -EMSGSIZE;
3212 }
3213
3214 static int nl80211_dump_survey(struct sk_buff *skb,
3215                         struct netlink_callback *cb)
3216 {
3217         struct survey_info survey;
3218         struct cfg80211_registered_device *dev;
3219         struct net_device *netdev;
3220         int survey_idx = cb->args[1];
3221         int res;
3222
3223         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3224         if (res)
3225                 return res;
3226
3227         if (!dev->ops->dump_survey) {
3228                 res = -EOPNOTSUPP;
3229                 goto out_err;
3230         }
3231
3232         while (1) {
3233                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3234                                             &survey);
3235                 if (res == -ENOENT)
3236                         break;
3237                 if (res)
3238                         goto out_err;
3239
3240                 if (nl80211_send_survey(skb,
3241                                 NETLINK_CB(cb->skb).pid,
3242                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3243                                 netdev,
3244                                 &survey) < 0)
3245                         goto out;
3246                 survey_idx++;
3247         }
3248
3249  out:
3250         cb->args[1] = survey_idx;
3251         res = skb->len;
3252  out_err:
3253         nl80211_finish_netdev_dump(dev);
3254         return res;
3255 }
3256
3257 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3258 {
3259         return auth_type <= NL80211_AUTHTYPE_MAX;
3260 }
3261
3262 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3263 {
3264         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3265                                   NL80211_WPA_VERSION_2));
3266 }
3267
3268 static bool nl80211_valid_akm_suite(u32 akm)
3269 {
3270         return akm == WLAN_AKM_SUITE_8021X ||
3271                 akm == WLAN_AKM_SUITE_PSK;
3272 }
3273
3274 static bool nl80211_valid_cipher_suite(u32 cipher)
3275 {
3276         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3277                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3278                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3279                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3280                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3281 }
3282
3283
3284 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3285 {
3286         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3287         struct net_device *dev = info->user_ptr[1];
3288         struct ieee80211_channel *chan;
3289         const u8 *bssid, *ssid, *ie = NULL;
3290         int err, ssid_len, ie_len = 0;
3291         enum nl80211_auth_type auth_type;
3292         struct key_parse key;
3293         bool local_state_change;
3294
3295         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3296                 return -EINVAL;
3297
3298         if (!info->attrs[NL80211_ATTR_MAC])
3299                 return -EINVAL;
3300
3301         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3302                 return -EINVAL;
3303
3304         if (!info->attrs[NL80211_ATTR_SSID])
3305                 return -EINVAL;
3306
3307         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3308                 return -EINVAL;
3309
3310         err = nl80211_parse_key(info, &key);
3311         if (err)
3312                 return err;
3313
3314         if (key.idx >= 0) {
3315                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3316                         return -EINVAL;
3317                 if (!key.p.key || !key.p.key_len)
3318                         return -EINVAL;
3319                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3320                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3321                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3322                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3323                         return -EINVAL;
3324                 if (key.idx > 4)
3325                         return -EINVAL;
3326         } else {
3327                 key.p.key_len = 0;
3328                 key.p.key = NULL;
3329         }
3330
3331         if (key.idx >= 0) {
3332                 int i;
3333                 bool ok = false;
3334                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3335                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3336                                 ok = true;
3337                                 break;
3338                         }
3339                 }
3340                 if (!ok)
3341                         return -EINVAL;
3342         }
3343
3344         if (!rdev->ops->auth)
3345                 return -EOPNOTSUPP;
3346
3347         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3348             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3349                 return -EOPNOTSUPP;
3350
3351         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3352         chan = ieee80211_get_channel(&rdev->wiphy,
3353                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3354         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3355                 return -EINVAL;
3356
3357         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3358         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3359
3360         if (info->attrs[NL80211_ATTR_IE]) {
3361                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3362                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3363         }
3364
3365         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3366         if (!nl80211_valid_auth_type(auth_type))
3367                 return -EINVAL;
3368
3369         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3370
3371         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3372                                   ssid, ssid_len, ie, ie_len,
3373                                   key.p.key, key.p.key_len, key.idx,
3374                                   local_state_change);
3375 }
3376
3377 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3378                                    struct genl_info *info,
3379                                    struct cfg80211_crypto_settings *settings,
3380                                    int cipher_limit)
3381 {
3382         memset(settings, 0, sizeof(*settings));
3383
3384         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3385
3386         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3387                 u16 proto;
3388                 proto = nla_get_u16(
3389                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3390                 settings->control_port_ethertype = cpu_to_be16(proto);
3391                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3392                     proto != ETH_P_PAE)
3393                         return -EINVAL;
3394                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3395                         settings->control_port_no_encrypt = true;
3396         } else
3397                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3398
3399         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3400                 void *data;
3401                 int len, i;
3402
3403                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3404                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3405                 settings->n_ciphers_pairwise = len / sizeof(u32);
3406
3407                 if (len % sizeof(u32))
3408                         return -EINVAL;
3409
3410                 if (settings->n_ciphers_pairwise > cipher_limit)
3411                         return -EINVAL;
3412
3413                 memcpy(settings->ciphers_pairwise, data, len);
3414
3415                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3416                         if (!nl80211_valid_cipher_suite(
3417                                         settings->ciphers_pairwise[i]))
3418                                 return -EINVAL;
3419         }
3420
3421         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3422                 settings->cipher_group =
3423                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3424                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3425                         return -EINVAL;
3426         }
3427
3428         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3429                 settings->wpa_versions =
3430                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3431                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3432                         return -EINVAL;
3433         }
3434
3435         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3436                 void *data;
3437                 int len, i;
3438
3439                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3440                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3441                 settings->n_akm_suites = len / sizeof(u32);
3442
3443                 if (len % sizeof(u32))
3444                         return -EINVAL;
3445
3446                 memcpy(settings->akm_suites, data, len);
3447
3448                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3449                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3450                                 return -EINVAL;
3451         }
3452
3453         return 0;
3454 }
3455
3456 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3457 {
3458         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3459         struct net_device *dev = info->user_ptr[1];
3460         struct cfg80211_crypto_settings crypto;
3461         struct ieee80211_channel *chan;
3462         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3463         int err, ssid_len, ie_len = 0;
3464         bool use_mfp = false;
3465
3466         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3467                 return -EINVAL;
3468
3469         if (!info->attrs[NL80211_ATTR_MAC] ||
3470             !info->attrs[NL80211_ATTR_SSID] ||
3471             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3472                 return -EINVAL;
3473
3474         if (!rdev->ops->assoc)
3475                 return -EOPNOTSUPP;
3476
3477         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3478             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3479                 return -EOPNOTSUPP;
3480
3481         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3482
3483         chan = ieee80211_get_channel(&rdev->wiphy,
3484                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3485         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3486                 return -EINVAL;
3487
3488         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3489         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3490
3491         if (info->attrs[NL80211_ATTR_IE]) {
3492                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3493                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3494         }
3495
3496         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3497                 enum nl80211_mfp mfp =
3498                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3499                 if (mfp == NL80211_MFP_REQUIRED)
3500                         use_mfp = true;
3501                 else if (mfp != NL80211_MFP_NO)
3502                         return -EINVAL;
3503         }
3504
3505         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3506                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3507
3508         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3509         if (!err)
3510                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3511                                           ssid, ssid_len, ie, ie_len, use_mfp,
3512                                           &crypto);
3513
3514         return err;
3515 }
3516
3517 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3518 {
3519         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3520         struct net_device *dev = info->user_ptr[1];
3521         const u8 *ie = NULL, *bssid;
3522         int ie_len = 0;
3523         u16 reason_code;
3524         bool local_state_change;
3525
3526         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3527                 return -EINVAL;
3528
3529         if (!info->attrs[NL80211_ATTR_MAC])
3530                 return -EINVAL;
3531
3532         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3533                 return -EINVAL;
3534
3535         if (!rdev->ops->deauth)
3536                 return -EOPNOTSUPP;
3537
3538         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3539             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3540                 return -EOPNOTSUPP;
3541
3542         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3543
3544         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3545         if (reason_code == 0) {
3546                 /* Reason Code 0 is reserved */
3547                 return -EINVAL;
3548         }
3549
3550         if (info->attrs[NL80211_ATTR_IE]) {
3551                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3552                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3553         }
3554
3555         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3556
3557         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3558                                     local_state_change);
3559 }
3560
3561 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3562 {
3563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3564         struct net_device *dev = info->user_ptr[1];
3565         const u8 *ie = NULL, *bssid;
3566         int ie_len = 0;
3567         u16 reason_code;
3568         bool local_state_change;
3569
3570         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3571                 return -EINVAL;
3572
3573         if (!info->attrs[NL80211_ATTR_MAC])
3574                 return -EINVAL;
3575
3576         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3577                 return -EINVAL;
3578
3579         if (!rdev->ops->disassoc)
3580                 return -EOPNOTSUPP;
3581
3582         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3583             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3584                 return -EOPNOTSUPP;
3585
3586         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3587
3588         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3589         if (reason_code == 0) {
3590                 /* Reason Code 0 is reserved */
3591                 return -EINVAL;
3592         }
3593
3594         if (info->attrs[NL80211_ATTR_IE]) {
3595                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3596                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3597         }
3598
3599         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3600
3601         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3602                                       local_state_change);
3603 }
3604
3605 static bool
3606 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
3607                          int mcast_rate[IEEE80211_NUM_BANDS],
3608                          int rateval)
3609 {
3610         struct wiphy *wiphy = &rdev->wiphy;
3611         bool found = false;
3612         int band, i;
3613
3614         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3615                 struct ieee80211_supported_band *sband;
3616
3617                 sband = wiphy->bands[band];
3618                 if (!sband)
3619                         continue;
3620
3621                 for (i = 0; i < sband->n_bitrates; i++) {
3622                         if (sband->bitrates[i].bitrate == rateval) {
3623                                 mcast_rate[band] = i + 1;
3624                                 found = true;
3625                                 break;
3626                         }
3627                 }
3628         }
3629
3630         return found;
3631 }
3632
3633 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3634 {
3635         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3636         struct net_device *dev = info->user_ptr[1];
3637         struct cfg80211_ibss_params ibss;
3638         struct wiphy *wiphy;
3639         struct cfg80211_cached_keys *connkeys = NULL;
3640         int err;
3641
3642         memset(&ibss, 0, sizeof(ibss));
3643
3644         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3645                 return -EINVAL;
3646
3647         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3648             !info->attrs[NL80211_ATTR_SSID] ||
3649             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3650                 return -EINVAL;
3651
3652         ibss.beacon_interval = 100;
3653
3654         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3655                 ibss.beacon_interval =
3656                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3657                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3658                         return -EINVAL;
3659         }
3660
3661         if (!rdev->ops->join_ibss)
3662                 return -EOPNOTSUPP;
3663
3664         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3665                 return -EOPNOTSUPP;
3666
3667         wiphy = &rdev->wiphy;
3668
3669         if (info->attrs[NL80211_ATTR_MAC])
3670                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3671         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3672         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3673
3674         if (info->attrs[NL80211_ATTR_IE]) {
3675                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3676                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3677         }
3678
3679         ibss.channel = ieee80211_get_channel(wiphy,
3680                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3681         if (!ibss.channel ||
3682             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3683             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3684                 return -EINVAL;
3685
3686         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3687         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3688
3689         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3690                 u8 *rates =
3691                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3692                 int n_rates =
3693                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3694                 struct ieee80211_supported_band *sband =
3695                         wiphy->bands[ibss.channel->band];
3696                 int i, j;
3697
3698                 if (n_rates == 0)
3699                         return -EINVAL;
3700
3701                 for (i = 0; i < n_rates; i++) {
3702                         int rate = (rates[i] & 0x7f) * 5;
3703                         bool found = false;
3704
3705                         for (j = 0; j < sband->n_bitrates; j++) {
3706                                 if (sband->bitrates[j].bitrate == rate) {
3707                                         found = true;
3708                                         ibss.basic_rates |= BIT(j);
3709                                         break;
3710                                 }
3711                         }
3712                         if (!found)
3713                                 return -EINVAL;
3714                 }
3715         }
3716
3717         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
3718             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
3719                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
3720                 return -EINVAL;
3721
3722         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3723                 connkeys = nl80211_parse_connkeys(rdev,
3724                                         info->attrs[NL80211_ATTR_KEYS]);
3725                 if (IS_ERR(connkeys))
3726                         return PTR_ERR(connkeys);
3727         }
3728
3729         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3730         if (err)
3731                 kfree(connkeys);
3732         return err;
3733 }
3734
3735 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3736 {
3737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3738         struct net_device *dev = info->user_ptr[1];
3739
3740         if (!rdev->ops->leave_ibss)
3741                 return -EOPNOTSUPP;
3742
3743         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3744                 return -EOPNOTSUPP;
3745
3746         return cfg80211_leave_ibss(rdev, dev, false);
3747 }
3748
3749 #ifdef CONFIG_NL80211_TESTMODE
3750 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3751         .name = "testmode",
3752 };
3753
3754 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3755 {
3756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3757         int err;
3758
3759         if (!info->attrs[NL80211_ATTR_TESTDATA])
3760                 return -EINVAL;
3761
3762         err = -EOPNOTSUPP;
3763         if (rdev->ops->testmode_cmd) {
3764                 rdev->testmode_info = info;
3765                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3766                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3767                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3768                 rdev->testmode_info = NULL;
3769         }
3770
3771         return err;
3772 }
3773
3774 static struct sk_buff *
3775 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3776                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3777 {
3778         struct sk_buff *skb;
3779         void *hdr;
3780         struct nlattr *data;
3781
3782         skb = nlmsg_new(approxlen + 100, gfp);
3783         if (!skb)
3784                 return NULL;
3785
3786         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3787         if (!hdr) {
3788                 kfree_skb(skb);
3789                 return NULL;
3790         }
3791
3792         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3793         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3794
3795         ((void **)skb->cb)[0] = rdev;
3796         ((void **)skb->cb)[1] = hdr;
3797         ((void **)skb->cb)[2] = data;
3798
3799         return skb;
3800
3801  nla_put_failure:
3802         kfree_skb(skb);
3803         return NULL;
3804 }
3805
3806 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3807                                                   int approxlen)
3808 {
3809         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3810
3811         if (WARN_ON(!rdev->testmode_info))
3812                 return NULL;
3813
3814         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3815                                 rdev->testmode_info->snd_pid,
3816                                 rdev->testmode_info->snd_seq,
3817                                 GFP_KERNEL);
3818 }
3819 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3820
3821 int cfg80211_testmode_reply(struct sk_buff *skb)
3822 {
3823         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3824         void *hdr = ((void **)skb->cb)[1];
3825         struct nlattr *data = ((void **)skb->cb)[2];
3826
3827         if (WARN_ON(!rdev->testmode_info)) {
3828                 kfree_skb(skb);
3829                 return -EINVAL;
3830         }
3831
3832         nla_nest_end(skb, data);
3833         genlmsg_end(skb, hdr);
3834         return genlmsg_reply(skb, rdev->testmode_info);
3835 }
3836 EXPORT_SYMBOL(cfg80211_testmode_reply);
3837
3838 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3839                                                   int approxlen, gfp_t gfp)
3840 {
3841         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3842
3843         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3844 }
3845 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3846
3847 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3848 {
3849         void *hdr = ((void **)skb->cb)[1];
3850         struct nlattr *data = ((void **)skb->cb)[2];
3851
3852         nla_nest_end(skb, data);
3853         genlmsg_end(skb, hdr);
3854         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3855 }
3856 EXPORT_SYMBOL(cfg80211_testmode_event);
3857 #endif
3858
3859 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3860 {
3861         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3862         struct net_device *dev = info->user_ptr[1];
3863         struct cfg80211_connect_params connect;
3864         struct wiphy *wiphy;
3865         struct cfg80211_cached_keys *connkeys = NULL;
3866         int err;
3867
3868         memset(&connect, 0, sizeof(connect));
3869
3870         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3871                 return -EINVAL;
3872
3873         if (!info->attrs[NL80211_ATTR_SSID] ||
3874             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3875                 return -EINVAL;
3876
3877         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3878                 connect.auth_type =
3879                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3880                 if (!nl80211_valid_auth_type(connect.auth_type))
3881                         return -EINVAL;
3882         } else
3883                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3884
3885         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3886
3887         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
3888                                       NL80211_MAX_NR_CIPHER_SUITES);
3889         if (err)
3890                 return err;
3891
3892         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3893             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3894                 return -EOPNOTSUPP;
3895
3896         wiphy = &rdev->wiphy;
3897
3898         if (info->attrs[NL80211_ATTR_MAC])
3899                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3900         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3901         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3902
3903         if (info->attrs[NL80211_ATTR_IE]) {
3904                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3905                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3906         }
3907
3908         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3909                 connect.channel =
3910                         ieee80211_get_channel(wiphy,
3911                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3912                 if (!connect.channel ||
3913                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
3914                         return -EINVAL;
3915         }
3916
3917         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3918                 connkeys = nl80211_parse_connkeys(rdev,
3919                                         info->attrs[NL80211_ATTR_KEYS]);
3920                 if (IS_ERR(connkeys))
3921                         return PTR_ERR(connkeys);
3922         }
3923
3924         err = cfg80211_connect(rdev, dev, &connect, connkeys);
3925         if (err)
3926                 kfree(connkeys);
3927         return err;
3928 }
3929
3930 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
3931 {
3932         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3933         struct net_device *dev = info->user_ptr[1];
3934         u16 reason;
3935
3936         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3937                 reason = WLAN_REASON_DEAUTH_LEAVING;
3938         else
3939                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3940
3941         if (reason == 0)
3942                 return -EINVAL;
3943
3944         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3945             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3946                 return -EOPNOTSUPP;
3947
3948         return cfg80211_disconnect(rdev, dev, reason, true);
3949 }
3950
3951 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
3952 {
3953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3954         struct net *net;
3955         int err;
3956         u32 pid;
3957
3958         if (!info->attrs[NL80211_ATTR_PID])
3959                 return -EINVAL;
3960
3961         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
3962
3963         net = get_net_ns_by_pid(pid);
3964         if (IS_ERR(net))
3965                 return PTR_ERR(net);
3966
3967         err = 0;
3968
3969         /* check if anything to do */
3970         if (!net_eq(wiphy_net(&rdev->wiphy), net))
3971                 err = cfg80211_switch_netns(rdev, net);
3972
3973         put_net(net);
3974         return err;
3975 }
3976
3977 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
3978 {
3979         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3980         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
3981                         struct cfg80211_pmksa *pmksa) = NULL;
3982         struct net_device *dev = info->user_ptr[1];
3983         struct cfg80211_pmksa pmksa;
3984
3985         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
3986
3987         if (!info->attrs[NL80211_ATTR_MAC])
3988                 return -EINVAL;
3989
3990         if (!info->attrs[NL80211_ATTR_PMKID])
3991                 return -EINVAL;
3992
3993         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
3994         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3995
3996         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3997             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3998                 return -EOPNOTSUPP;
3999
4000         switch (info->genlhdr->cmd) {
4001         case NL80211_CMD_SET_PMKSA:
4002                 rdev_ops = rdev->ops->set_pmksa;
4003                 break;
4004         case NL80211_CMD_DEL_PMKSA:
4005                 rdev_ops = rdev->ops->del_pmksa;
4006                 break;
4007         default:
4008                 WARN_ON(1);
4009                 break;
4010         }
4011
4012         if (!rdev_ops)
4013                 return -EOPNOTSUPP;
4014
4015         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4016 }
4017
4018 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4019 {
4020         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4021         struct net_device *dev = info->user_ptr[1];
4022
4023         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4024             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4025                 return -EOPNOTSUPP;
4026
4027         if (!rdev->ops->flush_pmksa)
4028                 return -EOPNOTSUPP;
4029
4030         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4031 }
4032
4033 static int nl80211_remain_on_channel(struct sk_buff *skb,
4034                                      struct genl_info *info)
4035 {
4036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4037         struct net_device *dev = info->user_ptr[1];
4038         struct ieee80211_channel *chan;
4039         struct sk_buff *msg;
4040         void *hdr;
4041         u64 cookie;
4042         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4043         u32 freq, duration;
4044         int err;
4045
4046         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4047             !info->attrs[NL80211_ATTR_DURATION])
4048                 return -EINVAL;
4049
4050         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4051
4052         /*
4053          * We should be on that channel for at least one jiffie,
4054          * and more than 5 seconds seems excessive.
4055          */
4056         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4057                 return -EINVAL;
4058
4059         if (!rdev->ops->remain_on_channel)
4060                 return -EOPNOTSUPP;
4061
4062         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4063                 channel_type = nla_get_u32(
4064                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4065                 if (channel_type != NL80211_CHAN_NO_HT &&
4066                     channel_type != NL80211_CHAN_HT20 &&
4067                     channel_type != NL80211_CHAN_HT40PLUS &&
4068                     channel_type != NL80211_CHAN_HT40MINUS)
4069                         return -EINVAL;
4070         }
4071
4072         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4073         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4074         if (chan == NULL)
4075                 return -EINVAL;
4076
4077         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4078         if (!msg)
4079                 return -ENOMEM;
4080
4081         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4082                              NL80211_CMD_REMAIN_ON_CHANNEL);
4083
4084         if (IS_ERR(hdr)) {
4085                 err = PTR_ERR(hdr);
4086                 goto free_msg;
4087         }
4088
4089         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4090                                            channel_type, duration, &cookie);
4091
4092         if (err)
4093                 goto free_msg;
4094
4095         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4096
4097         genlmsg_end(msg, hdr);
4098
4099         return genlmsg_reply(msg, info);
4100
4101  nla_put_failure:
4102         err = -ENOBUFS;
4103  free_msg:
4104         nlmsg_free(msg);
4105         return err;
4106 }
4107
4108 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4109                                             struct genl_info *info)
4110 {
4111         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4112         struct net_device *dev = info->user_ptr[1];
4113         u64 cookie;
4114
4115         if (!info->attrs[NL80211_ATTR_COOKIE])
4116                 return -EINVAL;
4117
4118         if (!rdev->ops->cancel_remain_on_channel)
4119                 return -EOPNOTSUPP;
4120
4121         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4122
4123         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4124 }
4125
4126 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4127                            u8 *rates, u8 rates_len)
4128 {
4129         u8 i;
4130         u32 mask = 0;
4131
4132         for (i = 0; i < rates_len; i++) {
4133                 int rate = (rates[i] & 0x7f) * 5;
4134                 int ridx;
4135                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4136                         struct ieee80211_rate *srate =
4137                                 &sband->bitrates[ridx];
4138                         if (rate == srate->bitrate) {
4139                                 mask |= 1 << ridx;
4140                                 break;
4141                         }
4142                 }
4143                 if (ridx == sband->n_bitrates)
4144                         return 0; /* rate not found */
4145         }
4146
4147         return mask;
4148 }
4149
4150 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4151         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4152                                     .len = NL80211_MAX_SUPP_RATES },
4153 };
4154
4155 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4156                                        struct genl_info *info)
4157 {
4158         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4159         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4160         struct cfg80211_bitrate_mask mask;
4161         int rem, i;
4162         struct net_device *dev = info->user_ptr[1];
4163         struct nlattr *tx_rates;
4164         struct ieee80211_supported_band *sband;
4165
4166         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4167                 return -EINVAL;
4168
4169         if (!rdev->ops->set_bitrate_mask)
4170                 return -EOPNOTSUPP;
4171
4172         memset(&mask, 0, sizeof(mask));
4173         /* Default to all rates enabled */
4174         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4175                 sband = rdev->wiphy.bands[i];
4176                 mask.control[i].legacy =
4177                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4178         }
4179
4180         /*
4181          * The nested attribute uses enum nl80211_band as the index. This maps
4182          * directly to the enum ieee80211_band values used in cfg80211.
4183          */
4184         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4185         {
4186                 enum ieee80211_band band = nla_type(tx_rates);
4187                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4188                         return -EINVAL;
4189                 sband = rdev->wiphy.bands[band];
4190                 if (sband == NULL)
4191                         return -EINVAL;
4192                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4193                           nla_len(tx_rates), nl80211_txattr_policy);
4194                 if (tb[NL80211_TXRATE_LEGACY]) {
4195                         mask.control[band].legacy = rateset_to_mask(
4196                                 sband,
4197                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4198                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4199                         if (mask.control[band].legacy == 0)
4200                                 return -EINVAL;
4201                 }
4202         }
4203
4204         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4205 }
4206
4207 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4208 {
4209         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4210         struct net_device *dev = info->user_ptr[1];
4211         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4212
4213         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4214                 return -EINVAL;
4215
4216         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4217                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4218
4219         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4220             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4221             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4222             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4223             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4224             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4225                 return -EOPNOTSUPP;
4226
4227         /* not much point in registering if we can't reply */
4228         if (!rdev->ops->mgmt_tx)
4229                 return -EOPNOTSUPP;
4230
4231         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4232                         frame_type,
4233                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4234                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4235 }
4236
4237 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4238 {
4239         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4240         struct net_device *dev = info->user_ptr[1];
4241         struct ieee80211_channel *chan;
4242         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4243         bool channel_type_valid = false;
4244         u32 freq;
4245         int err;
4246         void *hdr;
4247         u64 cookie;
4248         struct sk_buff *msg;
4249         unsigned int wait = 0;
4250         bool offchan;
4251
4252         if (!info->attrs[NL80211_ATTR_FRAME] ||
4253             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4254                 return -EINVAL;
4255
4256         if (!rdev->ops->mgmt_tx)
4257                 return -EOPNOTSUPP;
4258
4259         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4260             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4261             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4262             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4263             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4264             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4265                 return -EOPNOTSUPP;
4266
4267         if (info->attrs[NL80211_ATTR_DURATION]) {
4268                 if (!rdev->ops->mgmt_tx_cancel_wait)
4269                         return -EINVAL;
4270                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4271         }
4272
4273         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4274                 channel_type = nla_get_u32(
4275                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4276                 if (channel_type != NL80211_CHAN_NO_HT &&
4277                     channel_type != NL80211_CHAN_HT20 &&
4278                     channel_type != NL80211_CHAN_HT40PLUS &&
4279                     channel_type != NL80211_CHAN_HT40MINUS)
4280                         return -EINVAL;
4281                 channel_type_valid = true;
4282         }
4283
4284         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4285
4286         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4287         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4288         if (chan == NULL)
4289                 return -EINVAL;
4290
4291         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4292         if (!msg)
4293                 return -ENOMEM;
4294
4295         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4296                              NL80211_CMD_FRAME);
4297
4298         if (IS_ERR(hdr)) {
4299                 err = PTR_ERR(hdr);
4300                 goto free_msg;
4301         }
4302         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4303                                     channel_type_valid, wait,
4304                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4305                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4306                                     &cookie);
4307         if (err)
4308                 goto free_msg;
4309
4310         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4311
4312         genlmsg_end(msg, hdr);
4313         return genlmsg_reply(msg, info);
4314
4315  nla_put_failure:
4316         err = -ENOBUFS;
4317  free_msg:
4318         nlmsg_free(msg);
4319         return err;
4320 }
4321
4322 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4323 {
4324         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4325         struct net_device *dev = info->user_ptr[1];
4326         u64 cookie;
4327
4328         if (!info->attrs[NL80211_ATTR_COOKIE])
4329                 return -EINVAL;
4330
4331         if (!rdev->ops->mgmt_tx_cancel_wait)
4332                 return -EOPNOTSUPP;
4333
4334         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4335             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4336             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4337             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4338             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4339             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4340                 return -EOPNOTSUPP;
4341
4342         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4343
4344         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4345 }
4346
4347 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4348 {
4349         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4350         struct wireless_dev *wdev;
4351         struct net_device *dev = info->user_ptr[1];
4352         u8 ps_state;
4353         bool state;
4354         int err;
4355
4356         if (!info->attrs[NL80211_ATTR_PS_STATE])
4357                 return -EINVAL;
4358
4359         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4360
4361         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4362                 return -EINVAL;
4363
4364         wdev = dev->ieee80211_ptr;
4365
4366         if (!rdev->ops->set_power_mgmt)
4367                 return -EOPNOTSUPP;
4368
4369         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4370
4371         if (state == wdev->ps)
4372                 return 0;
4373
4374         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4375                                         wdev->ps_timeout);
4376         if (!err)
4377                 wdev->ps = state;
4378         return err;
4379 }
4380
4381 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4382 {
4383         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4384         enum nl80211_ps_state ps_state;
4385         struct wireless_dev *wdev;
4386         struct net_device *dev = info->user_ptr[1];
4387         struct sk_buff *msg;
4388         void *hdr;
4389         int err;
4390
4391         wdev = dev->ieee80211_ptr;
4392
4393         if (!rdev->ops->set_power_mgmt)
4394                 return -EOPNOTSUPP;
4395
4396         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4397         if (!msg)
4398                 return -ENOMEM;
4399
4400         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4401                              NL80211_CMD_GET_POWER_SAVE);
4402         if (!hdr) {
4403                 err = -ENOBUFS;
4404                 goto free_msg;
4405         }
4406
4407         if (wdev->ps)
4408                 ps_state = NL80211_PS_ENABLED;
4409         else
4410                 ps_state = NL80211_PS_DISABLED;
4411
4412         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4413
4414         genlmsg_end(msg, hdr);
4415         return genlmsg_reply(msg, info);
4416
4417  nla_put_failure:
4418         err = -ENOBUFS;
4419  free_msg:
4420         nlmsg_free(msg);
4421         return err;
4422 }
4423
4424 static struct nla_policy
4425 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4426         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4427         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4428         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4429 };
4430
4431 static int nl80211_set_cqm_rssi(struct genl_info *info,
4432                                 s32 threshold, u32 hysteresis)
4433 {
4434         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4435         struct wireless_dev *wdev;
4436         struct net_device *dev = info->user_ptr[1];
4437
4438         if (threshold > 0)
4439                 return -EINVAL;
4440
4441         wdev = dev->ieee80211_ptr;
4442
4443         if (!rdev->ops->set_cqm_rssi_config)
4444                 return -EOPNOTSUPP;
4445
4446         if (wdev->iftype != NL80211_IFTYPE_STATION &&
4447             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4448                 return -EOPNOTSUPP;
4449
4450         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4451                                               threshold, hysteresis);
4452 }
4453
4454 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4455 {
4456         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4457         struct nlattr *cqm;
4458         int err;
4459
4460         cqm = info->attrs[NL80211_ATTR_CQM];
4461         if (!cqm) {
4462                 err = -EINVAL;
4463                 goto out;
4464         }
4465
4466         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4467                                nl80211_attr_cqm_policy);
4468         if (err)
4469                 goto out;
4470
4471         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4472             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4473                 s32 threshold;
4474                 u32 hysteresis;
4475                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4476                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4477                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4478         } else
4479                 err = -EINVAL;
4480
4481 out:
4482         return err;
4483 }
4484
4485 #define NL80211_FLAG_NEED_WIPHY         0x01
4486 #define NL80211_FLAG_NEED_NETDEV        0x02
4487 #define NL80211_FLAG_NEED_RTNL          0x04
4488 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
4489 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
4490                                          NL80211_FLAG_CHECK_NETDEV_UP)
4491
4492 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4493                             struct genl_info *info)
4494 {
4495         struct cfg80211_registered_device *rdev;
4496         struct net_device *dev;
4497         int err;
4498         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4499
4500         if (rtnl)
4501                 rtnl_lock();
4502
4503         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4504                 rdev = cfg80211_get_dev_from_info(info);
4505                 if (IS_ERR(rdev)) {
4506                         if (rtnl)
4507                                 rtnl_unlock();
4508                         return PTR_ERR(rdev);
4509                 }
4510                 info->user_ptr[0] = rdev;
4511         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4512                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4513                 if (err) {
4514                         if (rtnl)
4515                                 rtnl_unlock();
4516                         return err;
4517                 }
4518                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4519                     !netif_running(dev)) {
4520                         cfg80211_unlock_rdev(rdev);
4521                         dev_put(dev);
4522                         if (rtnl)
4523                                 rtnl_unlock();
4524                         return -ENETDOWN;
4525                 }
4526                 info->user_ptr[0] = rdev;
4527                 info->user_ptr[1] = dev;
4528         }
4529
4530         return 0;
4531 }
4532
4533 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4534                               struct genl_info *info)
4535 {
4536         if (info->user_ptr[0])
4537                 cfg80211_unlock_rdev(info->user_ptr[0]);
4538         if (info->user_ptr[1])
4539                 dev_put(info->user_ptr[1]);
4540         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4541                 rtnl_unlock();
4542 }
4543
4544 static struct genl_ops nl80211_ops[] = {
4545         {
4546                 .cmd = NL80211_CMD_GET_WIPHY,
4547                 .doit = nl80211_get_wiphy,
4548                 .dumpit = nl80211_dump_wiphy,
4549                 .policy = nl80211_policy,
4550                 /* can be retrieved by unprivileged users */
4551                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4552         },
4553         {
4554                 .cmd = NL80211_CMD_SET_WIPHY,
4555                 .doit = nl80211_set_wiphy,
4556                 .policy = nl80211_policy,
4557                 .flags = GENL_ADMIN_PERM,
4558                 .internal_flags = NL80211_FLAG_NEED_RTNL,
4559         },
4560         {
4561                 .cmd = NL80211_CMD_GET_INTERFACE,
4562                 .doit = nl80211_get_interface,
4563                 .dumpit = nl80211_dump_interface,
4564                 .policy = nl80211_policy,
4565                 /* can be retrieved by unprivileged users */
4566                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4567         },
4568         {
4569                 .cmd = NL80211_CMD_SET_INTERFACE,
4570                 .doit = nl80211_set_interface,
4571                 .policy = nl80211_policy,
4572                 .flags = GENL_ADMIN_PERM,
4573                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4574                                   NL80211_FLAG_NEED_RTNL,
4575         },
4576         {
4577                 .cmd = NL80211_CMD_NEW_INTERFACE,
4578                 .doit = nl80211_new_interface,
4579                 .policy = nl80211_policy,
4580                 .flags = GENL_ADMIN_PERM,
4581                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4582                                   NL80211_FLAG_NEED_RTNL,
4583         },
4584         {
4585                 .cmd = NL80211_CMD_DEL_INTERFACE,
4586                 .doit = nl80211_del_interface,
4587                 .policy = nl80211_policy,
4588                 .flags = GENL_ADMIN_PERM,
4589                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4590                                   NL80211_FLAG_NEED_RTNL,
4591         },
4592         {
4593                 .cmd = NL80211_CMD_GET_KEY,
4594                 .doit = nl80211_get_key,
4595                 .policy = nl80211_policy,
4596                 .flags = GENL_ADMIN_PERM,
4597                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4598                                   NL80211_FLAG_NEED_RTNL,
4599         },
4600         {
4601                 .cmd = NL80211_CMD_SET_KEY,
4602                 .doit = nl80211_set_key,
4603                 .policy = nl80211_policy,
4604                 .flags = GENL_ADMIN_PERM,
4605                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4606                                   NL80211_FLAG_NEED_RTNL,
4607         },
4608         {
4609                 .cmd = NL80211_CMD_NEW_KEY,
4610                 .doit = nl80211_new_key,
4611                 .policy = nl80211_policy,
4612                 .flags = GENL_ADMIN_PERM,
4613                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4614                                   NL80211_FLAG_NEED_RTNL,
4615         },
4616         {
4617                 .cmd = NL80211_CMD_DEL_KEY,
4618                 .doit = nl80211_del_key,
4619                 .policy = nl80211_policy,
4620                 .flags = GENL_ADMIN_PERM,
4621                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4622                                   NL80211_FLAG_NEED_RTNL,
4623         },
4624         {
4625                 .cmd = NL80211_CMD_SET_BEACON,
4626                 .policy = nl80211_policy,
4627                 .flags = GENL_ADMIN_PERM,
4628                 .doit = nl80211_addset_beacon,
4629                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4630                                   NL80211_FLAG_NEED_RTNL,
4631         },
4632         {
4633                 .cmd = NL80211_CMD_NEW_BEACON,
4634                 .policy = nl80211_policy,
4635                 .flags = GENL_ADMIN_PERM,
4636                 .doit = nl80211_addset_beacon,
4637                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4638                                   NL80211_FLAG_NEED_RTNL,
4639         },
4640         {
4641                 .cmd = NL80211_CMD_DEL_BEACON,
4642                 .policy = nl80211_policy,
4643                 .flags = GENL_ADMIN_PERM,
4644                 .doit = nl80211_del_beacon,
4645                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4646                                   NL80211_FLAG_NEED_RTNL,
4647         },
4648         {
4649                 .cmd = NL80211_CMD_GET_STATION,
4650                 .doit = nl80211_get_station,
4651                 .dumpit = nl80211_dump_station,
4652                 .policy = nl80211_policy,
4653                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4654                                   NL80211_FLAG_NEED_RTNL,
4655         },
4656         {
4657                 .cmd = NL80211_CMD_SET_STATION,
4658                 .doit = nl80211_set_station,
4659                 .policy = nl80211_policy,
4660                 .flags = GENL_ADMIN_PERM,
4661                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4662                                   NL80211_FLAG_NEED_RTNL,
4663         },
4664         {
4665                 .cmd = NL80211_CMD_NEW_STATION,
4666                 .doit = nl80211_new_station,
4667                 .policy = nl80211_policy,
4668                 .flags = GENL_ADMIN_PERM,
4669                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4670                                   NL80211_FLAG_NEED_RTNL,
4671         },
4672         {
4673                 .cmd = NL80211_CMD_DEL_STATION,
4674                 .doit = nl80211_del_station,
4675                 .policy = nl80211_policy,
4676                 .flags = GENL_ADMIN_PERM,
4677                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4678                                   NL80211_FLAG_NEED_RTNL,
4679         },
4680         {
4681                 .cmd = NL80211_CMD_GET_MPATH,
4682                 .doit = nl80211_get_mpath,
4683                 .dumpit = nl80211_dump_mpath,
4684                 .policy = nl80211_policy,
4685                 .flags = GENL_ADMIN_PERM,
4686                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4687                                   NL80211_FLAG_NEED_RTNL,
4688         },
4689         {
4690                 .cmd = NL80211_CMD_SET_MPATH,
4691                 .doit = nl80211_set_mpath,
4692                 .policy = nl80211_policy,
4693                 .flags = GENL_ADMIN_PERM,
4694                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4695                                   NL80211_FLAG_NEED_RTNL,
4696         },
4697         {
4698                 .cmd = NL80211_CMD_NEW_MPATH,
4699                 .doit = nl80211_new_mpath,
4700                 .policy = nl80211_policy,
4701                 .flags = GENL_ADMIN_PERM,
4702                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4703                                   NL80211_FLAG_NEED_RTNL,
4704         },
4705         {
4706                 .cmd = NL80211_CMD_DEL_MPATH,
4707                 .doit = nl80211_del_mpath,
4708                 .policy = nl80211_policy,
4709                 .flags = GENL_ADMIN_PERM,
4710                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4711                                   NL80211_FLAG_NEED_RTNL,
4712         },
4713         {
4714                 .cmd = NL80211_CMD_SET_BSS,
4715                 .doit = nl80211_set_bss,
4716                 .policy = nl80211_policy,
4717                 .flags = GENL_ADMIN_PERM,
4718                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4719                                   NL80211_FLAG_NEED_RTNL,
4720         },
4721         {
4722                 .cmd = NL80211_CMD_GET_REG,
4723                 .doit = nl80211_get_reg,
4724                 .policy = nl80211_policy,
4725                 /* can be retrieved by unprivileged users */
4726         },
4727         {
4728                 .cmd = NL80211_CMD_SET_REG,
4729                 .doit = nl80211_set_reg,
4730                 .policy = nl80211_policy,
4731                 .flags = GENL_ADMIN_PERM,
4732         },
4733         {
4734                 .cmd = NL80211_CMD_REQ_SET_REG,
4735                 .doit = nl80211_req_set_reg,
4736                 .policy = nl80211_policy,
4737                 .flags = GENL_ADMIN_PERM,
4738         },
4739         {
4740                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4741                 .doit = nl80211_get_mesh_params,
4742                 .policy = nl80211_policy,
4743                 /* can be retrieved by unprivileged users */
4744                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4745                                   NL80211_FLAG_NEED_RTNL,
4746         },
4747         {
4748                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4749                 .doit = nl80211_set_mesh_params,
4750                 .policy = nl80211_policy,
4751                 .flags = GENL_ADMIN_PERM,
4752                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4753                                   NL80211_FLAG_NEED_RTNL,
4754         },
4755         {
4756                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4757                 .doit = nl80211_trigger_scan,
4758                 .policy = nl80211_policy,
4759                 .flags = GENL_ADMIN_PERM,
4760                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4761                                   NL80211_FLAG_NEED_RTNL,
4762         },
4763         {
4764                 .cmd = NL80211_CMD_GET_SCAN,
4765                 .policy = nl80211_policy,
4766                 .dumpit = nl80211_dump_scan,
4767         },
4768         {
4769                 .cmd = NL80211_CMD_AUTHENTICATE,
4770                 .doit = nl80211_authenticate,
4771                 .policy = nl80211_policy,
4772                 .flags = GENL_ADMIN_PERM,
4773                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4774                                   NL80211_FLAG_NEED_RTNL,
4775         },
4776         {
4777                 .cmd = NL80211_CMD_ASSOCIATE,
4778                 .doit = nl80211_associate,
4779                 .policy = nl80211_policy,
4780                 .flags = GENL_ADMIN_PERM,
4781                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4782                                   NL80211_FLAG_NEED_RTNL,
4783         },
4784         {
4785                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4786                 .doit = nl80211_deauthenticate,
4787                 .policy = nl80211_policy,
4788                 .flags = GENL_ADMIN_PERM,
4789                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4790                                   NL80211_FLAG_NEED_RTNL,
4791         },
4792         {
4793                 .cmd = NL80211_CMD_DISASSOCIATE,
4794                 .doit = nl80211_disassociate,
4795                 .policy = nl80211_policy,
4796                 .flags = GENL_ADMIN_PERM,
4797                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4798                                   NL80211_FLAG_NEED_RTNL,
4799         },
4800         {
4801                 .cmd = NL80211_CMD_JOIN_IBSS,
4802                 .doit = nl80211_join_ibss,
4803                 .policy = nl80211_policy,
4804                 .flags = GENL_ADMIN_PERM,
4805                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4806                                   NL80211_FLAG_NEED_RTNL,
4807         },
4808         {
4809                 .cmd = NL80211_CMD_LEAVE_IBSS,
4810                 .doit = nl80211_leave_ibss,
4811                 .policy = nl80211_policy,
4812                 .flags = GENL_ADMIN_PERM,
4813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4814                                   NL80211_FLAG_NEED_RTNL,
4815         },
4816 #ifdef CONFIG_NL80211_TESTMODE
4817         {
4818                 .cmd = NL80211_CMD_TESTMODE,
4819                 .doit = nl80211_testmode_do,
4820                 .policy = nl80211_policy,
4821                 .flags = GENL_ADMIN_PERM,
4822                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4823                                   NL80211_FLAG_NEED_RTNL,
4824         },
4825 #endif
4826         {
4827                 .cmd = NL80211_CMD_CONNECT,
4828                 .doit = nl80211_connect,
4829                 .policy = nl80211_policy,
4830                 .flags = GENL_ADMIN_PERM,
4831                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4832                                   NL80211_FLAG_NEED_RTNL,
4833         },
4834         {
4835                 .cmd = NL80211_CMD_DISCONNECT,
4836                 .doit = nl80211_disconnect,
4837                 .policy = nl80211_policy,
4838                 .flags = GENL_ADMIN_PERM,
4839                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4840                                   NL80211_FLAG_NEED_RTNL,
4841         },
4842         {
4843                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4844                 .doit = nl80211_wiphy_netns,
4845                 .policy = nl80211_policy,
4846                 .flags = GENL_ADMIN_PERM,
4847                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4848                                   NL80211_FLAG_NEED_RTNL,
4849         },
4850         {
4851                 .cmd = NL80211_CMD_GET_SURVEY,
4852                 .policy = nl80211_policy,
4853                 .dumpit = nl80211_dump_survey,
4854         },
4855         {
4856                 .cmd = NL80211_CMD_SET_PMKSA,
4857                 .doit = nl80211_setdel_pmksa,
4858                 .policy = nl80211_policy,
4859                 .flags = GENL_ADMIN_PERM,
4860                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4861                                   NL80211_FLAG_NEED_RTNL,
4862         },
4863         {
4864                 .cmd = NL80211_CMD_DEL_PMKSA,
4865                 .doit = nl80211_setdel_pmksa,
4866                 .policy = nl80211_policy,
4867                 .flags = GENL_ADMIN_PERM,
4868                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4869                                   NL80211_FLAG_NEED_RTNL,
4870         },
4871         {
4872                 .cmd = NL80211_CMD_FLUSH_PMKSA,
4873                 .doit = nl80211_flush_pmksa,
4874                 .policy = nl80211_policy,
4875                 .flags = GENL_ADMIN_PERM,
4876                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4877                                   NL80211_FLAG_NEED_RTNL,
4878         },
4879         {
4880                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
4881                 .doit = nl80211_remain_on_channel,
4882                 .policy = nl80211_policy,
4883                 .flags = GENL_ADMIN_PERM,
4884                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4885                                   NL80211_FLAG_NEED_RTNL,
4886         },
4887         {
4888                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
4889                 .doit = nl80211_cancel_remain_on_channel,
4890                 .policy = nl80211_policy,
4891                 .flags = GENL_ADMIN_PERM,
4892                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4893                                   NL80211_FLAG_NEED_RTNL,
4894         },
4895         {
4896                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
4897                 .doit = nl80211_set_tx_bitrate_mask,
4898                 .policy = nl80211_policy,
4899                 .flags = GENL_ADMIN_PERM,
4900                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4901                                   NL80211_FLAG_NEED_RTNL,
4902         },
4903         {
4904                 .cmd = NL80211_CMD_REGISTER_FRAME,
4905                 .doit = nl80211_register_mgmt,
4906                 .policy = nl80211_policy,
4907                 .flags = GENL_ADMIN_PERM,
4908                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4909                                   NL80211_FLAG_NEED_RTNL,
4910         },
4911         {
4912                 .cmd = NL80211_CMD_FRAME,
4913                 .doit = nl80211_tx_mgmt,
4914                 .policy = nl80211_policy,
4915                 .flags = GENL_ADMIN_PERM,
4916                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4917                                   NL80211_FLAG_NEED_RTNL,
4918         },
4919         {
4920                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
4921                 .doit = nl80211_tx_mgmt_cancel_wait,
4922                 .policy = nl80211_policy,
4923                 .flags = GENL_ADMIN_PERM,
4924                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4925                                   NL80211_FLAG_NEED_RTNL,
4926         },
4927         {
4928                 .cmd = NL80211_CMD_SET_POWER_SAVE,
4929                 .doit = nl80211_set_power_save,
4930                 .policy = nl80211_policy,
4931                 .flags = GENL_ADMIN_PERM,
4932                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4933                                   NL80211_FLAG_NEED_RTNL,
4934         },
4935         {
4936                 .cmd = NL80211_CMD_GET_POWER_SAVE,
4937                 .doit = nl80211_get_power_save,
4938                 .policy = nl80211_policy,
4939                 /* can be retrieved by unprivileged users */
4940                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4941                                   NL80211_FLAG_NEED_RTNL,
4942         },
4943         {
4944                 .cmd = NL80211_CMD_SET_CQM,
4945                 .doit = nl80211_set_cqm,
4946                 .policy = nl80211_policy,
4947                 .flags = GENL_ADMIN_PERM,
4948                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4949                                   NL80211_FLAG_NEED_RTNL,
4950         },
4951         {
4952                 .cmd = NL80211_CMD_SET_CHANNEL,
4953                 .doit = nl80211_set_channel,
4954                 .policy = nl80211_policy,
4955                 .flags = GENL_ADMIN_PERM,
4956                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4957                                   NL80211_FLAG_NEED_RTNL,
4958         },
4959         {
4960                 .cmd = NL80211_CMD_SET_WDS_PEER,
4961                 .doit = nl80211_set_wds_peer,
4962                 .policy = nl80211_policy,
4963                 .flags = GENL_ADMIN_PERM,
4964                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4965                                   NL80211_FLAG_NEED_RTNL,
4966         },
4967 };
4968
4969 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4970         .name = "mlme",
4971 };
4972
4973 /* multicast groups */
4974 static struct genl_multicast_group nl80211_config_mcgrp = {
4975         .name = "config",
4976 };
4977 static struct genl_multicast_group nl80211_scan_mcgrp = {
4978         .name = "scan",
4979 };
4980 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4981         .name = "regulatory",
4982 };
4983
4984 /* notification functions */
4985
4986 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4987 {
4988         struct sk_buff *msg;
4989
4990         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4991         if (!msg)
4992                 return;
4993
4994         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4995                 nlmsg_free(msg);
4996                 return;
4997         }
4998
4999         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5000                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5001 }
5002
5003 static int nl80211_add_scan_req(struct sk_buff *msg,
5004                                 struct cfg80211_registered_device *rdev)
5005 {
5006         struct cfg80211_scan_request *req = rdev->scan_req;
5007         struct nlattr *nest;
5008         int i;
5009
5010         ASSERT_RDEV_LOCK(rdev);
5011
5012         if (WARN_ON(!req))
5013                 return 0;
5014
5015         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5016         if (!nest)
5017                 goto nla_put_failure;
5018         for (i = 0; i < req->n_ssids; i++)
5019                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5020         nla_nest_end(msg, nest);
5021
5022         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5023         if (!nest)
5024                 goto nla_put_failure;
5025         for (i = 0; i < req->n_channels; i++)
5026                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5027         nla_nest_end(msg, nest);
5028
5029         if (req->ie)
5030                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5031
5032         return 0;
5033  nla_put_failure:
5034         return -ENOBUFS;
5035 }
5036
5037 static int nl80211_send_scan_msg(struct sk_buff *msg,
5038                                  struct cfg80211_registered_device *rdev,
5039                                  struct net_device *netdev,
5040                                  u32 pid, u32 seq, int flags,
5041                                  u32 cmd)
5042 {
5043         void *hdr;
5044
5045         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5046         if (!hdr)
5047                 return -1;
5048
5049         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5050         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5051
5052         /* ignore errors and send incomplete event anyway */
5053         nl80211_add_scan_req(msg, rdev);
5054
5055         return genlmsg_end(msg, hdr);
5056
5057  nla_put_failure:
5058         genlmsg_cancel(msg, hdr);
5059         return -EMSGSIZE;
5060 }
5061
5062 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5063                              struct net_device *netdev)
5064 {
5065         struct sk_buff *msg;
5066
5067         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5068         if (!msg)
5069                 return;
5070
5071         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5072                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5073                 nlmsg_free(msg);
5074                 return;
5075         }
5076
5077         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5078                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5079 }
5080
5081 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5082                             struct net_device *netdev)
5083 {
5084         struct sk_buff *msg;
5085
5086         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5087         if (!msg)
5088                 return;
5089
5090         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5091                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5092                 nlmsg_free(msg);
5093                 return;
5094         }
5095
5096         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5097                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5098 }
5099
5100 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5101                                struct net_device *netdev)
5102 {
5103         struct sk_buff *msg;
5104
5105         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5106         if (!msg)
5107                 return;
5108
5109         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5110                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5111                 nlmsg_free(msg);
5112                 return;
5113         }
5114
5115         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5116                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5117 }
5118
5119 /*
5120  * This can happen on global regulatory changes or device specific settings
5121  * based on custom world regulatory domains.
5122  */
5123 void nl80211_send_reg_change_event(struct regulatory_request *request)
5124 {
5125         struct sk_buff *msg;
5126         void *hdr;
5127
5128         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5129         if (!msg)
5130                 return;
5131
5132         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5133         if (!hdr) {
5134                 nlmsg_free(msg);
5135                 return;
5136         }
5137
5138         /* Userspace can always count this one always being set */
5139         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5140
5141         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5142                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5143                            NL80211_REGDOM_TYPE_WORLD);
5144         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5145                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5146                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5147         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5148                  request->intersect)
5149                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5150                            NL80211_REGDOM_TYPE_INTERSECTION);
5151         else {
5152                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5153                            NL80211_REGDOM_TYPE_COUNTRY);
5154                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5155         }
5156
5157         if (wiphy_idx_valid(request->wiphy_idx))
5158                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5159
5160         if (genlmsg_end(msg, hdr) < 0) {
5161                 nlmsg_free(msg);
5162                 return;
5163         }
5164
5165         rcu_read_lock();
5166         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5167                                 GFP_ATOMIC);
5168         rcu_read_unlock();
5169
5170         return;
5171
5172 nla_put_failure:
5173         genlmsg_cancel(msg, hdr);
5174         nlmsg_free(msg);
5175 }
5176
5177 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5178                                     struct net_device *netdev,
5179                                     const u8 *buf, size_t len,
5180                                     enum nl80211_commands cmd, gfp_t gfp)
5181 {
5182         struct sk_buff *msg;
5183         void *hdr;
5184
5185         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5186         if (!msg)
5187                 return;
5188
5189         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5190         if (!hdr) {
5191                 nlmsg_free(msg);
5192                 return;
5193         }
5194
5195         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5196         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5197         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5198
5199         if (genlmsg_end(msg, hdr) < 0) {
5200                 nlmsg_free(msg);
5201                 return;
5202         }
5203
5204         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5205                                 nl80211_mlme_mcgrp.id, gfp);
5206         return;
5207
5208  nla_put_failure:
5209         genlmsg_cancel(msg, hdr);
5210         nlmsg_free(msg);
5211 }
5212
5213 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5214                           struct net_device *netdev, const u8 *buf,
5215                           size_t len, gfp_t gfp)
5216 {
5217         nl80211_send_mlme_event(rdev, netdev, buf, len,
5218                                 NL80211_CMD_AUTHENTICATE, gfp);
5219 }
5220
5221 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5222                            struct net_device *netdev, const u8 *buf,
5223                            size_t len, gfp_t gfp)
5224 {
5225         nl80211_send_mlme_event(rdev, netdev, buf, len,
5226                                 NL80211_CMD_ASSOCIATE, gfp);
5227 }
5228
5229 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5230                          struct net_device *netdev, const u8 *buf,
5231                          size_t len, gfp_t gfp)
5232 {
5233         nl80211_send_mlme_event(rdev, netdev, buf, len,
5234                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5235 }
5236
5237 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5238                            struct net_device *netdev, const u8 *buf,
5239                            size_t len, gfp_t gfp)
5240 {
5241         nl80211_send_mlme_event(rdev, netdev, buf, len,
5242                                 NL80211_CMD_DISASSOCIATE, gfp);
5243 }
5244
5245 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5246                                       struct net_device *netdev, int cmd,
5247                                       const u8 *addr, gfp_t gfp)
5248 {
5249         struct sk_buff *msg;
5250         void *hdr;
5251
5252         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5253         if (!msg)
5254                 return;
5255
5256         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5257         if (!hdr) {
5258                 nlmsg_free(msg);
5259                 return;
5260         }
5261
5262         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5263         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5264         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5265         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5266
5267         if (genlmsg_end(msg, hdr) < 0) {
5268                 nlmsg_free(msg);
5269                 return;
5270         }
5271
5272         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5273                                 nl80211_mlme_mcgrp.id, gfp);
5274         return;
5275
5276  nla_put_failure:
5277         genlmsg_cancel(msg, hdr);
5278         nlmsg_free(msg);
5279 }
5280
5281 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5282                                struct net_device *netdev, const u8 *addr,
5283                                gfp_t gfp)
5284 {
5285         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5286                                   addr, gfp);
5287 }
5288
5289 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5290                                 struct net_device *netdev, const u8 *addr,
5291                                 gfp_t gfp)
5292 {
5293         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5294                                   addr, gfp);
5295 }
5296
5297 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5298                                  struct net_device *netdev, const u8 *bssid,
5299                                  const u8 *req_ie, size_t req_ie_len,
5300                                  const u8 *resp_ie, size_t resp_ie_len,
5301                                  u16 status, gfp_t gfp)
5302 {
5303         struct sk_buff *msg;
5304         void *hdr;
5305
5306         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5307         if (!msg)
5308                 return;
5309
5310         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5311         if (!hdr) {
5312                 nlmsg_free(msg);
5313                 return;
5314         }
5315
5316         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5317         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5318         if (bssid)
5319                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5320         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5321         if (req_ie)
5322                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5323         if (resp_ie)
5324                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5325
5326         if (genlmsg_end(msg, hdr) < 0) {
5327                 nlmsg_free(msg);
5328                 return;
5329         }
5330
5331         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5332                                 nl80211_mlme_mcgrp.id, gfp);
5333         return;
5334
5335  nla_put_failure:
5336         genlmsg_cancel(msg, hdr);
5337         nlmsg_free(msg);
5338
5339 }
5340
5341 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5342                          struct net_device *netdev, const u8 *bssid,
5343                          const u8 *req_ie, size_t req_ie_len,
5344                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5345 {
5346         struct sk_buff *msg;
5347         void *hdr;
5348
5349         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5350         if (!msg)
5351                 return;
5352
5353         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5354         if (!hdr) {
5355                 nlmsg_free(msg);
5356                 return;
5357         }
5358
5359         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5360         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5361         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5362         if (req_ie)
5363                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5364         if (resp_ie)
5365                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5366
5367         if (genlmsg_end(msg, hdr) < 0) {
5368                 nlmsg_free(msg);
5369                 return;
5370         }
5371
5372         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5373                                 nl80211_mlme_mcgrp.id, gfp);
5374         return;
5375
5376  nla_put_failure:
5377         genlmsg_cancel(msg, hdr);
5378         nlmsg_free(msg);
5379
5380 }
5381
5382 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5383                                struct net_device *netdev, u16 reason,
5384                                const u8 *ie, size_t ie_len, bool from_ap)
5385 {
5386         struct sk_buff *msg;
5387         void *hdr;
5388
5389         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5390         if (!msg)
5391                 return;
5392
5393         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5394         if (!hdr) {
5395                 nlmsg_free(msg);
5396                 return;
5397         }
5398
5399         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5400         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5401         if (from_ap && reason)
5402                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5403         if (from_ap)
5404                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5405         if (ie)
5406                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5407
5408         if (genlmsg_end(msg, hdr) < 0) {
5409                 nlmsg_free(msg);
5410                 return;
5411         }
5412
5413         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5414                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5415         return;
5416
5417  nla_put_failure:
5418         genlmsg_cancel(msg, hdr);
5419         nlmsg_free(msg);
5420
5421 }
5422
5423 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5424                              struct net_device *netdev, const u8 *bssid,
5425                              gfp_t gfp)
5426 {
5427         struct sk_buff *msg;
5428         void *hdr;
5429
5430         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5431         if (!msg)
5432                 return;
5433
5434         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5435         if (!hdr) {
5436                 nlmsg_free(msg);
5437                 return;
5438         }
5439
5440         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5441         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5442         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5443
5444         if (genlmsg_end(msg, hdr) < 0) {
5445                 nlmsg_free(msg);
5446                 return;
5447         }
5448
5449         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5450                                 nl80211_mlme_mcgrp.id, gfp);
5451         return;
5452
5453  nla_put_failure:
5454         genlmsg_cancel(msg, hdr);
5455         nlmsg_free(msg);
5456 }
5457
5458 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5459                                  struct net_device *netdev, const u8 *addr,
5460                                  enum nl80211_key_type key_type, int key_id,
5461                                  const u8 *tsc, gfp_t gfp)
5462 {
5463         struct sk_buff *msg;
5464         void *hdr;
5465
5466         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5467         if (!msg)
5468                 return;
5469
5470         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5471         if (!hdr) {
5472                 nlmsg_free(msg);
5473                 return;
5474         }
5475
5476         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5477         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5478         if (addr)
5479                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5480         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5481         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5482         if (tsc)
5483                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5484
5485         if (genlmsg_end(msg, hdr) < 0) {
5486                 nlmsg_free(msg);
5487                 return;
5488         }
5489
5490         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5491                                 nl80211_mlme_mcgrp.id, gfp);
5492         return;
5493
5494  nla_put_failure:
5495         genlmsg_cancel(msg, hdr);
5496         nlmsg_free(msg);
5497 }
5498
5499 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5500                                     struct ieee80211_channel *channel_before,
5501                                     struct ieee80211_channel *channel_after)
5502 {
5503         struct sk_buff *msg;
5504         void *hdr;
5505         struct nlattr *nl_freq;
5506
5507         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5508         if (!msg)
5509                 return;
5510
5511         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5512         if (!hdr) {
5513                 nlmsg_free(msg);
5514                 return;
5515         }
5516
5517         /*
5518          * Since we are applying the beacon hint to a wiphy we know its
5519          * wiphy_idx is valid
5520          */
5521         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5522
5523         /* Before */
5524         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5525         if (!nl_freq)
5526                 goto nla_put_failure;
5527         if (nl80211_msg_put_channel(msg, channel_before))
5528                 goto nla_put_failure;
5529         nla_nest_end(msg, nl_freq);
5530
5531         /* After */
5532         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5533         if (!nl_freq)
5534                 goto nla_put_failure;
5535         if (nl80211_msg_put_channel(msg, channel_after))
5536                 goto nla_put_failure;
5537         nla_nest_end(msg, nl_freq);
5538
5539         if (genlmsg_end(msg, hdr) < 0) {
5540                 nlmsg_free(msg);
5541                 return;
5542         }
5543
5544         rcu_read_lock();
5545         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5546                                 GFP_ATOMIC);
5547         rcu_read_unlock();
5548
5549         return;
5550
5551 nla_put_failure:
5552         genlmsg_cancel(msg, hdr);
5553         nlmsg_free(msg);
5554 }
5555
5556 static void nl80211_send_remain_on_chan_event(
5557         int cmd, struct cfg80211_registered_device *rdev,
5558         struct net_device *netdev, u64 cookie,
5559         struct ieee80211_channel *chan,
5560         enum nl80211_channel_type channel_type,
5561         unsigned int duration, gfp_t gfp)
5562 {
5563         struct sk_buff *msg;
5564         void *hdr;
5565
5566         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5567         if (!msg)
5568                 return;
5569
5570         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5571         if (!hdr) {
5572                 nlmsg_free(msg);
5573                 return;
5574         }
5575
5576         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5577         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5578         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5579         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5580         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5581
5582         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5583                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5584
5585         if (genlmsg_end(msg, hdr) < 0) {
5586                 nlmsg_free(msg);
5587                 return;
5588         }
5589
5590         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5591                                 nl80211_mlme_mcgrp.id, gfp);
5592         return;
5593
5594  nla_put_failure:
5595         genlmsg_cancel(msg, hdr);
5596         nlmsg_free(msg);
5597 }
5598
5599 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5600                                     struct net_device *netdev, u64 cookie,
5601                                     struct ieee80211_channel *chan,
5602                                     enum nl80211_channel_type channel_type,
5603                                     unsigned int duration, gfp_t gfp)
5604 {
5605         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5606                                           rdev, netdev, cookie, chan,
5607                                           channel_type, duration, gfp);
5608 }
5609
5610 void nl80211_send_remain_on_channel_cancel(
5611         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5612         u64 cookie, struct ieee80211_channel *chan,
5613         enum nl80211_channel_type channel_type, gfp_t gfp)
5614 {
5615         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5616                                           rdev, netdev, cookie, chan,
5617                                           channel_type, 0, gfp);
5618 }
5619
5620 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5621                             struct net_device *dev, const u8 *mac_addr,
5622                             struct station_info *sinfo, gfp_t gfp)
5623 {
5624         struct sk_buff *msg;
5625
5626         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5627         if (!msg)
5628                 return;
5629
5630         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5631                 nlmsg_free(msg);
5632                 return;
5633         }
5634
5635         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5636                                 nl80211_mlme_mcgrp.id, gfp);
5637 }
5638
5639 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5640                       struct net_device *netdev, u32 nlpid,
5641                       int freq, const u8 *buf, size_t len, gfp_t gfp)
5642 {
5643         struct sk_buff *msg;
5644         void *hdr;
5645         int err;
5646
5647         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5648         if (!msg)
5649                 return -ENOMEM;
5650
5651         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5652         if (!hdr) {
5653                 nlmsg_free(msg);
5654                 return -ENOMEM;
5655         }
5656
5657         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5658         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5659         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5660         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5661
5662         err = genlmsg_end(msg, hdr);
5663         if (err < 0) {
5664                 nlmsg_free(msg);
5665                 return err;
5666         }
5667
5668         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5669         if (err < 0)
5670                 return err;
5671         return 0;
5672
5673  nla_put_failure:
5674         genlmsg_cancel(msg, hdr);
5675         nlmsg_free(msg);
5676         return -ENOBUFS;
5677 }
5678
5679 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
5680                                  struct net_device *netdev, u64 cookie,
5681                                  const u8 *buf, size_t len, bool ack,
5682                                  gfp_t gfp)
5683 {
5684         struct sk_buff *msg;
5685         void *hdr;
5686
5687         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5688         if (!msg)
5689                 return;
5690
5691         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
5692         if (!hdr) {
5693                 nlmsg_free(msg);
5694                 return;
5695         }
5696
5697         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5698         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5699         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5700         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5701         if (ack)
5702                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5703
5704         if (genlmsg_end(msg, hdr) < 0) {
5705                 nlmsg_free(msg);
5706                 return;
5707         }
5708
5709         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5710         return;
5711
5712  nla_put_failure:
5713         genlmsg_cancel(msg, hdr);
5714         nlmsg_free(msg);
5715 }
5716
5717 void
5718 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
5719                              struct net_device *netdev,
5720                              enum nl80211_cqm_rssi_threshold_event rssi_event,
5721                              gfp_t gfp)
5722 {
5723         struct sk_buff *msg;
5724         struct nlattr *pinfoattr;
5725         void *hdr;
5726
5727         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5728         if (!msg)
5729                 return;
5730
5731         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
5732         if (!hdr) {
5733                 nlmsg_free(msg);
5734                 return;
5735         }
5736
5737         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5738         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5739
5740         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
5741         if (!pinfoattr)
5742                 goto nla_put_failure;
5743
5744         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
5745                     rssi_event);
5746
5747         nla_nest_end(msg, pinfoattr);
5748
5749         if (genlmsg_end(msg, hdr) < 0) {
5750                 nlmsg_free(msg);
5751                 return;
5752         }
5753
5754         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5755                                 nl80211_mlme_mcgrp.id, gfp);
5756         return;
5757
5758  nla_put_failure:
5759         genlmsg_cancel(msg, hdr);
5760         nlmsg_free(msg);
5761 }
5762
5763 void
5764 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
5765                                 struct net_device *netdev, const u8 *peer,
5766                                 u32 num_packets, gfp_t gfp)
5767 {
5768         struct sk_buff *msg;
5769         struct nlattr *pinfoattr;
5770         void *hdr;
5771
5772         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5773         if (!msg)
5774                 return;
5775
5776         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
5777         if (!hdr) {
5778                 nlmsg_free(msg);
5779                 return;
5780         }
5781
5782         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5783         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5784         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
5785
5786         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
5787         if (!pinfoattr)
5788                 goto nla_put_failure;
5789
5790         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
5791
5792         nla_nest_end(msg, pinfoattr);
5793
5794         if (genlmsg_end(msg, hdr) < 0) {
5795                 nlmsg_free(msg);
5796                 return;
5797         }
5798
5799         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5800                                 nl80211_mlme_mcgrp.id, gfp);
5801         return;
5802
5803  nla_put_failure:
5804         genlmsg_cancel(msg, hdr);
5805         nlmsg_free(msg);
5806 }
5807
5808 static int nl80211_netlink_notify(struct notifier_block * nb,
5809                                   unsigned long state,
5810                                   void *_notify)
5811 {
5812         struct netlink_notify *notify = _notify;
5813         struct cfg80211_registered_device *rdev;
5814         struct wireless_dev *wdev;
5815
5816         if (state != NETLINK_URELEASE)
5817                 return NOTIFY_DONE;
5818
5819         rcu_read_lock();
5820
5821         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
5822                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
5823                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
5824
5825         rcu_read_unlock();
5826
5827         return NOTIFY_DONE;
5828 }
5829
5830 static struct notifier_block nl80211_netlink_notifier = {
5831         .notifier_call = nl80211_netlink_notify,
5832 };
5833
5834 /* initialisation/exit functions */
5835
5836 int nl80211_init(void)
5837 {
5838         int err;
5839
5840         err = genl_register_family_with_ops(&nl80211_fam,
5841                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5842         if (err)
5843                 return err;
5844
5845         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5846         if (err)
5847                 goto err_out;
5848
5849         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5850         if (err)
5851                 goto err_out;
5852
5853         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5854         if (err)
5855                 goto err_out;
5856
5857         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5858         if (err)
5859                 goto err_out;
5860
5861 #ifdef CONFIG_NL80211_TESTMODE
5862         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5863         if (err)
5864                 goto err_out;
5865 #endif
5866
5867         err = netlink_register_notifier(&nl80211_netlink_notifier);
5868         if (err)
5869                 goto err_out;
5870
5871         return 0;
5872  err_out:
5873         genl_unregister_family(&nl80211_fam);
5874         return err;
5875 }
5876
5877 void nl80211_exit(void)
5878 {
5879         netlink_unregister_notifier(&nl80211_netlink_notifier);
5880         genl_unregister_family(&nl80211_fam);
5881 }