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
 167         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 169
 170         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 171
 172         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 174
 175         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 176 };
 177
 178 /* policy for the key attributes */
 179 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 180         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 181         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 182         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 183         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 184         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 185         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 186         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 187 };
 188
 189 /* ifidx get helper */
 190 static int nl80211_get_ifidx(struct netlink_callback *cb)
 191 {
 192         int res;
 193
 194         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 195                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 196                           nl80211_policy);
 197         if (res)
 198                 return res;
 199
 200         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 201                 return -EINVAL;
 202
 203         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 204         if (!res)
 205                 return -EINVAL;
 206         return res;
 207 }
 208
 209 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 210                                        struct netlink_callback *cb,
 211                                        struct cfg80211_registered_device **rdev,
 212                                        struct net_device **dev)
 213 {
 214         int ifidx = cb->args[0];
 215         int err;
 216
 217         if (!ifidx)
 218                 ifidx = nl80211_get_ifidx(cb);
 219         if (ifidx < 0)
 220                 return ifidx;
 221
 222         cb->args[0] = ifidx;
 223
 224         rtnl_lock();
 225
 226         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 227         if (!*dev) {
 228                 err = -ENODEV;
 229                 goto out_rtnl;
 230         }
 231
 232         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 233         if (IS_ERR(dev)) {
 234                 err = PTR_ERR(dev);
 235                 goto out_rtnl;
 236         }
 237
 238         return 0;
 239  out_rtnl:
 240         rtnl_unlock();
 241         return err;
 242 }
 243
 244 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 245 {
 246         cfg80211_unlock_rdev(rdev);
 247         rtnl_unlock();
 248 }
 249
 250 /* IE validation */
 251 static bool is_valid_ie_attr(const struct nlattr *attr)
 252 {
 253         const u8 *pos;
 254         int len;
 255
 256         if (!attr)
 257                 return true;
 258
 259         pos = nla_data(attr);
 260         len = nla_len(attr);
 261
 262         while (len) {
 263                 u8 elemlen;
 264
 265                 if (len < 2)
 266                         return false;
 267                 len -= 2;
 268
 269                 elemlen = pos[1];
 270                 if (elemlen > len)
 271                         return false;
 272
 273                 len -= elemlen;
 274                 pos += 2 + elemlen;
 275         }
 276
 277         return true;
 278 }
 279
 280 /* message building helper */
 281 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 282                                    int flags, u8 cmd)
 283 {
 284         /* since there is no private header just add the generic one */
 285         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 286 }
 287
 288 static int nl80211_msg_put_channel(struct sk_buff *msg,
 289                                    struct ieee80211_channel *chan)
 290 {
 291         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 292                     chan->center_freq);
 293
 294         if (chan->flags & IEEE80211_CHAN_DISABLED)
 295                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 296         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 297                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 298         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 299                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 300         if (chan->flags & IEEE80211_CHAN_RADAR)
 301                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 302
 303         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 304                     DBM_TO_MBM(chan->max_power));
 305
 306         return 0;
 307
 308  nla_put_failure:
 309         return -ENOBUFS;
 310 }
 311
 312 /* netlink command implementations */
 313
 314 struct key_parse {
 315         struct key_params p;
 316         int idx;
 317         int type;
 318         bool def, defmgmt;
 319 };
 320
 321 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 322 {
 323         struct nlattr *tb[NL80211_KEY_MAX + 1];
 324         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 325                                    nl80211_key_policy);
 326         if (err)
 327                 return err;
 328
 329         k->def = !!tb[NL80211_KEY_DEFAULT];
 330         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 331
 332         if (tb[NL80211_KEY_IDX])
 333                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 334
 335         if (tb[NL80211_KEY_DATA]) {
 336                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 337                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 338         }
 339
 340         if (tb[NL80211_KEY_SEQ]) {
 341                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 342                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 343         }
 344
 345         if (tb[NL80211_KEY_CIPHER])
 346                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 347
 348         if (tb[NL80211_KEY_TYPE]) {
 349                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 350                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 351                         return -EINVAL;
 352         }
 353
 354         return 0;
 355 }
 356
 357 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 358 {
 359         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 360                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 361                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 362         }
 363
 364         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 365                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 366                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 367         }
 368
 369         if (info->attrs[NL80211_ATTR_KEY_IDX])
 370                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 371
 372         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 373                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 374
 375         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 376         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 377
 378         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 379                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 380                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 381                         return -EINVAL;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 388 {
 389         int err;
 390
 391         memset(k, 0, sizeof(*k));
 392         k->idx = -1;
 393         k->type = -1;
 394
 395         if (info->attrs[NL80211_ATTR_KEY])
 396                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 397         else
 398                 err = nl80211_parse_key_old(info, k);
 399
 400         if (err)
 401                 return err;
 402
 403         if (k->def && k->defmgmt)
 404                 return -EINVAL;
 405
 406         if (k->idx != -1) {
 407                 if (k->defmgmt) {
 408                         if (k->idx < 4 || k->idx > 5)
 409                                 return -EINVAL;
 410                 } else if (k->def) {
 411                         if (k->idx < 0 || k->idx > 3)
 412                                 return -EINVAL;
 413                 } else {
 414                         if (k->idx < 0 || k->idx > 5)
 415                                 return -EINVAL;
 416                 }
 417         }
 418
 419         return 0;
 420 }
 421
 422 static struct cfg80211_cached_keys *
 423 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 424                        struct nlattr *keys)
 425 {
 426         struct key_parse parse;
 427         struct nlattr *key;
 428         struct cfg80211_cached_keys *result;
 429         int rem, err, def = 0;
 430
 431         result = kzalloc(sizeof(*result), GFP_KERNEL);
 432         if (!result)
 433                 return ERR_PTR(-ENOMEM);
 434
 435         result->def = -1;
 436         result->defmgmt = -1;
 437
 438         nla_for_each_nested(key, keys, rem) {
 439                 memset(&parse, 0, sizeof(parse));
 440                 parse.idx = -1;
 441
 442                 err = nl80211_parse_key_new(key, &parse);
 443                 if (err)
 444                         goto error;
 445                 err = -EINVAL;
 446                 if (!parse.p.key)
 447                         goto error;
 448                 if (parse.idx < 0 || parse.idx > 4)
 449                         goto error;
 450                 if (parse.def) {
 451                         if (def)
 452                                 goto error;
 453                         def = 1;
 454                         result->def = parse.idx;
 455                 } else if (parse.defmgmt)
 456                         goto error;
 457                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 458                                                      parse.idx, false, NULL);
 459                 if (err)
 460                         goto error;
 461                 result->params[parse.idx].cipher = parse.p.cipher;
 462                 result->params[parse.idx].key_len = parse.p.key_len;
 463                 result->params[parse.idx].key = result->data[parse.idx];
 464                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 465         }
 466
 467         return result;
 468  error:
 469         kfree(result);
 470         return ERR_PTR(err);
 471 }
 472
 473 static int nl80211_key_allowed(struct wireless_dev *wdev)
 474 {
 475         ASSERT_WDEV_LOCK(wdev);
 476
 477         switch (wdev->iftype) {
 478         case NL80211_IFTYPE_AP:
 479         case NL80211_IFTYPE_AP_VLAN:
 480         case NL80211_IFTYPE_P2P_GO:
 481                 break;
 482         case NL80211_IFTYPE_ADHOC:
 483                 if (!wdev->current_bss)
 484                         return -ENOLINK;
 485                 break;
 486         case NL80211_IFTYPE_STATION:
 487         case NL80211_IFTYPE_P2P_CLIENT:
 488                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 489                         return -ENOLINK;
 490                 break;
 491         default:
 492                 return -EINVAL;
 493         }
 494
 495         return 0;
 496 }
 497
 498 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 499                               struct cfg80211_registered_device *dev)
 500 {
 501         void *hdr;
 502         struct nlattr *nl_bands, *nl_band;
 503         struct nlattr *nl_freqs, *nl_freq;
 504         struct nlattr *nl_rates, *nl_rate;
 505         struct nlattr *nl_modes;
 506         struct nlattr *nl_cmds;
 507         enum ieee80211_band band;
 508         struct ieee80211_channel *chan;
 509         struct ieee80211_rate *rate;
 510         int i;
 511         u16 ifmodes = dev->wiphy.interface_modes;
 512         const struct ieee80211_txrx_stypes *mgmt_stypes =
 513                                 dev->wiphy.mgmt_stypes;
 514
 515         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 516         if (!hdr)
 517                 return -1;
 518
 519         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 520         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 521
 522         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 523                     cfg80211_rdev_list_generation);
 524
 525         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 526                    dev->wiphy.retry_short);
 527         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 528                    dev->wiphy.retry_long);
 529         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 530                     dev->wiphy.frag_threshold);
 531         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 532                     dev->wiphy.rts_threshold);
 533         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 534                     dev->wiphy.coverage_class);
 535         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 536                    dev->wiphy.max_scan_ssids);
 537         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 538                     dev->wiphy.max_scan_ie_len);
 539
 540         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 541                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 542
 543         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 544                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 545                 dev->wiphy.cipher_suites);
 546
 547         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 548                    dev->wiphy.max_num_pmkids);
 549
 550         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 551                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 552
 553         if (dev->ops->get_antenna) {
 554                 u32 tx_ant = 0, rx_ant = 0;
 555                 int res;
 556                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 557                 if (!res) {
 558                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 559                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 560                 }
 561         }
 562
 563         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 564         if (!nl_modes)
 565                 goto nla_put_failure;
 566
 567         i = 0;
 568         while (ifmodes) {
 569                 if (ifmodes & 1)
 570                         NLA_PUT_FLAG(msg, i);
 571                 ifmodes >>= 1;
 572                 i++;
 573         }
 574
 575         nla_nest_end(msg, nl_modes);
 576
 577         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 578         if (!nl_bands)
 579                 goto nla_put_failure;
 580
 581         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 582                 if (!dev->wiphy.bands[band])
 583                         continue;
 584
 585                 nl_band = nla_nest_start(msg, band);
 586                 if (!nl_band)
 587                         goto nla_put_failure;
 588
 589                 /* add HT info */
 590                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 591                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 592                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 593                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 594                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 595                                 dev->wiphy.bands[band]->ht_cap.cap);
 596                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 597                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 598                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 599                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 600                 }
 601
 602                 /* add frequencies */
 603                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 604                 if (!nl_freqs)
 605                         goto nla_put_failure;
 606
 607                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 608                         nl_freq = nla_nest_start(msg, i);
 609                         if (!nl_freq)
 610                                 goto nla_put_failure;
 611
 612                         chan = &dev->wiphy.bands[band]->channels[i];
 613
 614                         if (nl80211_msg_put_channel(msg, chan))
 615                                 goto nla_put_failure;
 616
 617                         nla_nest_end(msg, nl_freq);
 618                 }
 619
 620                 nla_nest_end(msg, nl_freqs);
 621
 622                 /* add bitrates */
 623                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 624                 if (!nl_rates)
 625                         goto nla_put_failure;
 626
 627                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 628                         nl_rate = nla_nest_start(msg, i);
 629                         if (!nl_rate)
 630                                 goto nla_put_failure;
 631
 632                         rate = &dev->wiphy.bands[band]->bitrates[i];
 633                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 634                                     rate->bitrate);
 635                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 636                                 NLA_PUT_FLAG(msg,
 637                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 638
 639                         nla_nest_end(msg, nl_rate);
 640                 }
 641
 642                 nla_nest_end(msg, nl_rates);
 643
 644                 nla_nest_end(msg, nl_band);
 645         }
 646         nla_nest_end(msg, nl_bands);
 647
 648         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 649         if (!nl_cmds)
 650                 goto nla_put_failure;
 651
 652         i = 0;
 653 #define CMD(op, n)                                              \
 654          do {                                                   \
 655                 if (dev->ops->op) {                             \
 656                         i++;                                    \
 657                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 658                 }                                               \
 659         } while (0)
 660
 661         CMD(add_virtual_intf, NEW_INTERFACE);
 662         CMD(change_virtual_intf, SET_INTERFACE);
 663         CMD(add_key, NEW_KEY);
 664         CMD(add_beacon, NEW_BEACON);
 665         CMD(add_station, NEW_STATION);
 666         CMD(add_mpath, NEW_MPATH);
 667         CMD(set_mesh_params, SET_MESH_PARAMS);
 668         CMD(change_bss, SET_BSS);
 669         CMD(auth, AUTHENTICATE);
 670         CMD(assoc, ASSOCIATE);
 671         CMD(deauth, DEAUTHENTICATE);
 672         CMD(disassoc, DISASSOCIATE);
 673         CMD(join_ibss, JOIN_IBSS);
 674         CMD(set_pmksa, SET_PMKSA);
 675         CMD(del_pmksa, DEL_PMKSA);
 676         CMD(flush_pmksa, FLUSH_PMKSA);
 677         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 678         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 679         CMD(mgmt_tx, FRAME);
 680         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 681                 i++;
 682                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 683         }
 684         CMD(set_channel, SET_CHANNEL);
 685         CMD(set_wds_peer, SET_WDS_PEER);
 686
 687 #undef CMD
 688
 689         if (dev->ops->connect || dev->ops->auth) {
 690                 i++;
 691                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 692         }
 693
 694         if (dev->ops->disconnect || dev->ops->deauth) {
 695                 i++;
 696                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 697         }
 698
 699         nla_nest_end(msg, nl_cmds);
 700
 701         if (mgmt_stypes) {
 702                 u16 stypes;
 703                 struct nlattr *nl_ftypes, *nl_ifs;
 704                 enum nl80211_iftype ift;
 705
 706                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 707                 if (!nl_ifs)
 708                         goto nla_put_failure;
 709
 710                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 711                         nl_ftypes = nla_nest_start(msg, ift);
 712                         if (!nl_ftypes)
 713                                 goto nla_put_failure;
 714                         i = 0;
 715                         stypes = mgmt_stypes[ift].tx;
 716                         while (stypes) {
 717                                 if (stypes & 1)
 718                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 719                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 720                                 stypes >>= 1;
 721                                 i++;
 722                         }
 723                         nla_nest_end(msg, nl_ftypes);
 724                 }
 725
 726                 nla_nest_end(msg, nl_ifs);
 727
 728                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 729                 if (!nl_ifs)
 730                         goto nla_put_failure;
 731
 732                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 733                         nl_ftypes = nla_nest_start(msg, ift);
 734                         if (!nl_ftypes)
 735                                 goto nla_put_failure;
 736                         i = 0;
 737                         stypes = mgmt_stypes[ift].rx;
 738                         while (stypes) {
 739                                 if (stypes & 1)
 740                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 741                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 742                                 stypes >>= 1;
 743                                 i++;
 744                         }
 745                         nla_nest_end(msg, nl_ftypes);
 746                 }
 747                 nla_nest_end(msg, nl_ifs);
 748         }
 749
 750         return genlmsg_end(msg, hdr);
 751
 752  nla_put_failure:
 753         genlmsg_cancel(msg, hdr);
 754         return -EMSGSIZE;
 755 }
 756
 757 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 758 {
 759         int idx = 0;
 760         int start = cb->args[0];
 761         struct cfg80211_registered_device *dev;
 762
 763         mutex_lock(&cfg80211_mutex);
 764         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 765                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 766                         continue;
 767                 if (++idx <= start)
 768                         continue;
 769                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 770                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 771                                        dev) < 0) {
 772                         idx--;
 773                         break;
 774                 }
 775         }
 776         mutex_unlock(&cfg80211_mutex);
 777
 778         cb->args[0] = idx;
 779
 780         return skb->len;
 781 }
 782
 783 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 784 {
 785         struct sk_buff *msg;
 786         struct cfg80211_registered_device *dev = info->user_ptr[0];
 787
 788         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 789         if (!msg)
 790                 return -ENOMEM;
 791
 792         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 793                 nlmsg_free(msg);
 794                 return -ENOBUFS;
 795         }
 796
 797         return genlmsg_reply(msg, info);
 798 }
 799
 800 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 801         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 802         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 803         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 804         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 805         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 806 };
 807
 808 static int parse_txq_params(struct nlattr *tb[],
 809                             struct ieee80211_txq_params *txq_params)
 810 {
 811         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 812             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 813             !tb[NL80211_TXQ_ATTR_AIFS])
 814                 return -EINVAL;
 815
 816         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 817         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 818         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 819         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 820         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 821
 822         return 0;
 823 }
 824
 825 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 826 {
 827         /*
 828          * You can only set the channel explicitly for AP, mesh
 829          * and WDS type interfaces; all others have their channel
 830          * managed via their respective "establish a connection"
 831          * command (connect, join, ...)
 832          *
 833          * Monitors are special as they are normally slaved to
 834          * whatever else is going on, so they behave as though
 835          * you tried setting the wiphy channel itself.
 836          */
 837         return !wdev ||
 838                 wdev->iftype == NL80211_IFTYPE_AP ||
 839                 wdev->iftype == NL80211_IFTYPE_WDS ||
 840                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 841                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
 842                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
 843 }
 844
 845 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 846                                  struct wireless_dev *wdev,
 847                                  struct genl_info *info)
 848 {
 849         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 850         u32 freq;
 851         int result;
 852
 853         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 854                 return -EINVAL;
 855
 856         if (!nl80211_can_set_dev_channel(wdev))
 857                 return -EOPNOTSUPP;
 858
 859         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 860                 channel_type = nla_get_u32(info->attrs[
 861                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 862                 if (channel_type != NL80211_CHAN_NO_HT &&
 863                     channel_type != NL80211_CHAN_HT20 &&
 864                     channel_type != NL80211_CHAN_HT40PLUS &&
 865                     channel_type != NL80211_CHAN_HT40MINUS)
 866                         return -EINVAL;
 867         }
 868
 869         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 870
 871         mutex_lock(&rdev->devlist_mtx);
 872         if (wdev) {
 873                 wdev_lock(wdev);
 874                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 875                 wdev_unlock(wdev);
 876         } else {
 877                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 878         }
 879         mutex_unlock(&rdev->devlist_mtx);
 880
 881         return result;
 882 }
 883
 884 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 885 {
 886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 887         struct net_device *netdev = info->user_ptr[1];
 888
 889         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 890 }
 891
 892 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
 893 {
 894         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 895         struct net_device *dev = info->user_ptr[1];
 896         struct wireless_dev *wdev = dev->ieee80211_ptr;
 897         const u8 *bssid;
 898
 899         if (!info->attrs[NL80211_ATTR_MAC])
 900                 return -EINVAL;
 901
 902         if (netif_running(dev))
 903                 return -EBUSY;
 904
 905         if (!rdev->ops->set_wds_peer)
 906                 return -EOPNOTSUPP;
 907
 908         if (wdev->iftype != NL80211_IFTYPE_WDS)
 909                 return -EOPNOTSUPP;
 910
 911         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 912         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
 913 }
 914
 915
 916 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 917 {
 918         struct cfg80211_registered_device *rdev;
 919         struct net_device *netdev = NULL;
 920         struct wireless_dev *wdev;
 921         int result = 0, rem_txq_params = 0;
 922         struct nlattr *nl_txq_params;
 923         u32 changed;
 924         u8 retry_short = 0, retry_long = 0;
 925         u32 frag_threshold = 0, rts_threshold = 0;
 926         u8 coverage_class = 0;
 927
 928         /*
 929          * Try to find the wiphy and netdev. Normally this
 930          * function shouldn't need the netdev, but this is
 931          * done for backward compatibility -- previously
 932          * setting the channel was done per wiphy, but now
 933          * it is per netdev. Previous userland like hostapd
 934          * also passed a netdev to set_wiphy, so that it is
 935          * possible to let that go to the right netdev!
 936          */
 937         mutex_lock(&cfg80211_mutex);
 938
 939         if (info->attrs[NL80211_ATTR_IFINDEX]) {
 940                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
 941
 942                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
 943                 if (netdev && netdev->ieee80211_ptr) {
 944                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
 945                         mutex_lock(&rdev->mtx);
 946                 } else
 947                         netdev = NULL;
 948         }
 949
 950         if (!netdev) {
 951                 rdev = __cfg80211_rdev_from_info(info);
 952                 if (IS_ERR(rdev)) {
 953                         mutex_unlock(&cfg80211_mutex);
 954                         return PTR_ERR(rdev);
 955                 }
 956                 wdev = NULL;
 957                 netdev = NULL;
 958                 result = 0;
 959
 960                 mutex_lock(&rdev->mtx);
 961         } else if (netif_running(netdev) &&
 962                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
 963                 wdev = netdev->ieee80211_ptr;
 964         else
 965                 wdev = NULL;
 966
 967         /*
 968          * end workaround code, by now the rdev is available
 969          * and locked, and wdev may or may not be NULL.
 970          */
 971
 972         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 973                 result = cfg80211_dev_rename(
 974                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 975
 976         mutex_unlock(&cfg80211_mutex);
 977
 978         if (result)
 979                 goto bad_res;
 980
 981         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 982                 struct ieee80211_txq_params txq_params;
 983                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 984
 985                 if (!rdev->ops->set_txq_params) {
 986                         result = -EOPNOTSUPP;
 987                         goto bad_res;
 988                 }
 989
 990                 nla_for_each_nested(nl_txq_params,
 991                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 992                                     rem_txq_params) {
 993                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 994                                   nla_data(nl_txq_params),
 995                                   nla_len(nl_txq_params),
 996                                   txq_params_policy);
 997                         result = parse_txq_params(tb, &txq_params);
 998                         if (result)
 999                                 goto bad_res;
1000
1001                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1002                                                            &txq_params);
1003                         if (result)
1004                                 goto bad_res;
1005                 }
1006         }
1007
1008         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1009                 result = __nl80211_set_channel(rdev, wdev, info);
1010                 if (result)
1011                         goto bad_res;
1012         }
1013
1014         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1015                 enum nl80211_tx_power_setting type;
1016                 int idx, mbm = 0;
1017
1018                 if (!rdev->ops->set_tx_power) {
1019                         result = -EOPNOTSUPP;
1020                         goto bad_res;
1021                 }
1022
1023                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1024                 type = nla_get_u32(info->attrs[idx]);
1025
1026                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1027                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1028                         result = -EINVAL;
1029                         goto bad_res;
1030                 }
1031
1032                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1033                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1034                         mbm = nla_get_u32(info->attrs[idx]);
1035                 }
1036
1037                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1038                 if (result)
1039                         goto bad_res;
1040         }
1041
1042         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1043             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1044                 u32 tx_ant, rx_ant;
1045                 if (!rdev->ops->set_antenna) {
1046                         result = -EOPNOTSUPP;
1047                         goto bad_res;
1048                 }
1049
1050                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1051                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1052
1053                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1054                 if (result)
1055                         goto bad_res;
1056         }
1057
1058         changed = 0;
1059
1060         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1061                 retry_short = nla_get_u8(
1062                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1063                 if (retry_short == 0) {
1064                         result = -EINVAL;
1065                         goto bad_res;
1066                 }
1067                 changed |= WIPHY_PARAM_RETRY_SHORT;
1068         }
1069
1070         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1071                 retry_long = nla_get_u8(
1072                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1073                 if (retry_long == 0) {
1074                         result = -EINVAL;
1075                         goto bad_res;
1076                 }
1077                 changed |= WIPHY_PARAM_RETRY_LONG;
1078         }
1079
1080         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1081                 frag_threshold = nla_get_u32(
1082                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1083                 if (frag_threshold < 256) {
1084                         result = -EINVAL;
1085                         goto bad_res;
1086                 }
1087                 if (frag_threshold != (u32) -1) {
1088                         /*
1089                          * Fragments (apart from the last one) are required to
1090                          * have even length. Make the fragmentation code
1091                          * simpler by stripping LSB should someone try to use
1092                          * odd threshold value.
1093                          */
1094                         frag_threshold &= ~0x1;
1095                 }
1096                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1097         }
1098
1099         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1100                 rts_threshold = nla_get_u32(
1101                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1102                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1103         }
1104
1105         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1106                 coverage_class = nla_get_u8(
1107                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1108                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1109         }
1110
1111         if (changed) {
1112                 u8 old_retry_short, old_retry_long;
1113                 u32 old_frag_threshold, old_rts_threshold;
1114                 u8 old_coverage_class;
1115
1116                 if (!rdev->ops->set_wiphy_params) {
1117                         result = -EOPNOTSUPP;
1118                         goto bad_res;
1119                 }
1120
1121                 old_retry_short = rdev->wiphy.retry_short;
1122                 old_retry_long = rdev->wiphy.retry_long;
1123                 old_frag_threshold = rdev->wiphy.frag_threshold;
1124                 old_rts_threshold = rdev->wiphy.rts_threshold;
1125                 old_coverage_class = rdev->wiphy.coverage_class;
1126
1127                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1128                         rdev->wiphy.retry_short = retry_short;
1129                 if (changed & WIPHY_PARAM_RETRY_LONG)
1130                         rdev->wiphy.retry_long = retry_long;
1131                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1132                         rdev->wiphy.frag_threshold = frag_threshold;
1133                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1134                         rdev->wiphy.rts_threshold = rts_threshold;
1135                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1136                         rdev->wiphy.coverage_class = coverage_class;
1137
1138                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1139                 if (result) {
1140                         rdev->wiphy.retry_short = old_retry_short;
1141                         rdev->wiphy.retry_long = old_retry_long;
1142                         rdev->wiphy.frag_threshold = old_frag_threshold;
1143                         rdev->wiphy.rts_threshold = old_rts_threshold;
1144                         rdev->wiphy.coverage_class = old_coverage_class;
1145                 }
1146         }
1147
1148  bad_res:
1149         mutex_unlock(&rdev->mtx);
1150         if (netdev)
1151                 dev_put(netdev);
1152         return result;
1153 }
1154
1155
1156 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1157                               struct cfg80211_registered_device *rdev,
1158                               struct net_device *dev)
1159 {
1160         void *hdr;
1161
1162         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1163         if (!hdr)
1164                 return -1;
1165
1166         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1167         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1168         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1169         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1170
1171         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1172                     rdev->devlist_generation ^
1173                         (cfg80211_rdev_list_generation << 2));
1174
1175         return genlmsg_end(msg, hdr);
1176
1177  nla_put_failure:
1178         genlmsg_cancel(msg, hdr);
1179         return -EMSGSIZE;
1180 }
1181
1182 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1183 {
1184         int wp_idx = 0;
1185         int if_idx = 0;
1186         int wp_start = cb->args[0];
1187         int if_start = cb->args[1];
1188         struct cfg80211_registered_device *rdev;
1189         struct wireless_dev *wdev;
1190
1191         mutex_lock(&cfg80211_mutex);
1192         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1193                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1194                         continue;
1195                 if (wp_idx < wp_start) {
1196                         wp_idx++;
1197                         continue;
1198                 }
1199                 if_idx = 0;
1200
1201                 mutex_lock(&rdev->devlist_mtx);
1202                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1203                         if (if_idx < if_start) {
1204                                 if_idx++;
1205                                 continue;
1206                         }
1207                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1208                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1209                                                rdev, wdev->netdev) < 0) {
1210                                 mutex_unlock(&rdev->devlist_mtx);
1211                                 goto out;
1212                         }
1213                         if_idx++;
1214                 }
1215                 mutex_unlock(&rdev->devlist_mtx);
1216
1217                 wp_idx++;
1218         }
1219  out:
1220         mutex_unlock(&cfg80211_mutex);
1221
1222         cb->args[0] = wp_idx;
1223         cb->args[1] = if_idx;
1224
1225         return skb->len;
1226 }
1227
1228 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1229 {
1230         struct sk_buff *msg;
1231         struct cfg80211_registered_device *dev = info->user_ptr[0];
1232         struct net_device *netdev = info->user_ptr[1];
1233
1234         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1235         if (!msg)
1236                 return -ENOMEM;
1237
1238         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1239                                dev, netdev) < 0) {
1240                 nlmsg_free(msg);
1241                 return -ENOBUFS;
1242         }
1243
1244         return genlmsg_reply(msg, info);
1245 }
1246
1247 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1248         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1249         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1250         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1251         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1252         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1253 };
1254
1255 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1256 {
1257         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1258         int flag;
1259
1260         *mntrflags = 0;
1261
1262         if (!nla)
1263                 return -EINVAL;
1264
1265         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1266                              nla, mntr_flags_policy))
1267                 return -EINVAL;
1268
1269         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1270                 if (flags[flag])
1271                         *mntrflags |= (1<<flag);
1272
1273         return 0;
1274 }
1275
1276 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1277                                struct net_device *netdev, u8 use_4addr,
1278                                enum nl80211_iftype iftype)
1279 {
1280         if (!use_4addr) {
1281                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1282                         return -EBUSY;
1283                 return 0;
1284         }
1285
1286         switch (iftype) {
1287         case NL80211_IFTYPE_AP_VLAN:
1288                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1289                         return 0;
1290                 break;
1291         case NL80211_IFTYPE_STATION:
1292                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1293                         return 0;
1294                 break;
1295         default:
1296                 break;
1297         }
1298
1299         return -EOPNOTSUPP;
1300 }
1301
1302 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1303 {
1304         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1305         struct vif_params params;
1306         int err;
1307         enum nl80211_iftype otype, ntype;
1308         struct net_device *dev = info->user_ptr[1];
1309         u32 _flags, *flags = NULL;
1310         bool change = false;
1311
1312         memset(&params, 0, sizeof(params));
1313
1314         otype = ntype = dev->ieee80211_ptr->iftype;
1315
1316         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1317                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1318                 if (otype != ntype)
1319                         change = true;
1320                 if (ntype > NL80211_IFTYPE_MAX)
1321                         return -EINVAL;
1322         }
1323
1324         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1325                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1326                         return -EINVAL;
1327                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1328                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1329                 change = true;
1330         }
1331
1332         if (info->attrs[NL80211_ATTR_4ADDR]) {
1333                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1334                 change = true;
1335                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1336                 if (err)
1337                         return err;
1338         } else {
1339                 params.use_4addr = -1;
1340         }
1341
1342         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1343                 if (ntype != NL80211_IFTYPE_MONITOR)
1344                         return -EINVAL;
1345                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1346                                           &_flags);
1347                 if (err)
1348                         return err;
1349
1350                 flags = &_flags;
1351                 change = true;
1352         }
1353
1354         if (change)
1355                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1356         else
1357                 err = 0;
1358
1359         if (!err && params.use_4addr != -1)
1360                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1361
1362         return err;
1363 }
1364
1365 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1366 {
1367         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1368         struct vif_params params;
1369         int err;
1370         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1371         u32 flags;
1372
1373         memset(&params, 0, sizeof(params));
1374
1375         if (!info->attrs[NL80211_ATTR_IFNAME])
1376                 return -EINVAL;
1377
1378         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1379                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1380                 if (type > NL80211_IFTYPE_MAX)
1381                         return -EINVAL;
1382         }
1383
1384         if (!rdev->ops->add_virtual_intf ||
1385             !(rdev->wiphy.interface_modes & (1 << type)))
1386                 return -EOPNOTSUPP;
1387
1388         if (type == NL80211_IFTYPE_MESH_POINT &&
1389             info->attrs[NL80211_ATTR_MESH_ID]) {
1390                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1391                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1392         }
1393
1394         if (info->attrs[NL80211_ATTR_4ADDR]) {
1395                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1396                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1397                 if (err)
1398                         return err;
1399         }
1400
1401         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1402                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1403                                   &flags);
1404         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1405                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1406                 type, err ? NULL : &flags, &params);
1407
1408         return err;
1409 }
1410
1411 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1412 {
1413         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1414         struct net_device *dev = info->user_ptr[1];
1415
1416         if (!rdev->ops->del_virtual_intf)
1417                 return -EOPNOTSUPP;
1418
1419         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1420 }
1421
1422 struct get_key_cookie {
1423         struct sk_buff *msg;
1424         int error;
1425         int idx;
1426 };
1427
1428 static void get_key_callback(void *c, struct key_params *params)
1429 {
1430         struct nlattr *key;
1431         struct get_key_cookie *cookie = c;
1432
1433         if (params->key)
1434                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1435                         params->key_len, params->key);
1436
1437         if (params->seq)
1438                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1439                         params->seq_len, params->seq);
1440
1441         if (params->cipher)
1442                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1443                             params->cipher);
1444
1445         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1446         if (!key)
1447                 goto nla_put_failure;
1448
1449         if (params->key)
1450                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1451                         params->key_len, params->key);
1452
1453         if (params->seq)
1454                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1455                         params->seq_len, params->seq);
1456
1457         if (params->cipher)
1458                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1459                             params->cipher);
1460
1461         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1462
1463         nla_nest_end(cookie->msg, key);
1464
1465         return;
1466  nla_put_failure:
1467         cookie->error = 1;
1468 }
1469
1470 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1471 {
1472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1473         int err;
1474         struct net_device *dev = info->user_ptr[1];
1475         u8 key_idx = 0;
1476         const u8 *mac_addr = NULL;
1477         bool pairwise;
1478         struct get_key_cookie cookie = {
1479                 .error = 0,
1480         };
1481         void *hdr;
1482         struct sk_buff *msg;
1483
1484         if (info->attrs[NL80211_ATTR_KEY_IDX])
1485                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1486
1487         if (key_idx > 5)
1488                 return -EINVAL;
1489
1490         if (info->attrs[NL80211_ATTR_MAC])
1491                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1492
1493         pairwise = !!mac_addr;
1494         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1495                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1496                 if (kt >= NUM_NL80211_KEYTYPES)
1497                         return -EINVAL;
1498                 if (kt != NL80211_KEYTYPE_GROUP &&
1499                     kt != NL80211_KEYTYPE_PAIRWISE)
1500                         return -EINVAL;
1501                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1502         }
1503
1504         if (!rdev->ops->get_key)
1505                 return -EOPNOTSUPP;
1506
1507         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1508         if (!msg)
1509                 return -ENOMEM;
1510
1511         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1512                              NL80211_CMD_NEW_KEY);
1513         if (IS_ERR(hdr))
1514                 return PTR_ERR(hdr);
1515
1516         cookie.msg = msg;
1517         cookie.idx = key_idx;
1518
1519         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1520         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1521         if (mac_addr)
1522                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1523
1524         if (pairwise && mac_addr &&
1525             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1526                 return -ENOENT;
1527
1528         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1529                                  mac_addr, &cookie, get_key_callback);
1530
1531         if (err)
1532                 goto free_msg;
1533
1534         if (cookie.error)
1535                 goto nla_put_failure;
1536
1537         genlmsg_end(msg, hdr);
1538         return genlmsg_reply(msg, info);
1539
1540  nla_put_failure:
1541         err = -ENOBUFS;
1542  free_msg:
1543         nlmsg_free(msg);
1544         return err;
1545 }
1546
1547 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1548 {
1549         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1550         struct key_parse key;
1551         int err;
1552         struct net_device *dev = info->user_ptr[1];
1553         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1554                     u8 key_index);
1555
1556         err = nl80211_parse_key(info, &key);
1557         if (err)
1558                 return err;
1559
1560         if (key.idx < 0)
1561                 return -EINVAL;
1562
1563         /* only support setting default key */
1564         if (!key.def && !key.defmgmt)
1565                 return -EINVAL;
1566
1567         if (key.def)
1568                 func = rdev->ops->set_default_key;
1569         else
1570                 func = rdev->ops->set_default_mgmt_key;
1571
1572         if (!func)
1573                 return -EOPNOTSUPP;
1574
1575         wdev_lock(dev->ieee80211_ptr);
1576         err = nl80211_key_allowed(dev->ieee80211_ptr);
1577         if (!err)
1578                 err = func(&rdev->wiphy, dev, key.idx);
1579
1580 #ifdef CONFIG_CFG80211_WEXT
1581         if (!err) {
1582                 if (func == rdev->ops->set_default_key)
1583                         dev->ieee80211_ptr->wext.default_key = key.idx;
1584                 else
1585                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1586         }
1587 #endif
1588         wdev_unlock(dev->ieee80211_ptr);
1589
1590         return err;
1591 }
1592
1593 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1594 {
1595         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1596         int err;
1597         struct net_device *dev = info->user_ptr[1];
1598         struct key_parse key;
1599         const u8 *mac_addr = NULL;
1600
1601         err = nl80211_parse_key(info, &key);
1602         if (err)
1603                 return err;
1604
1605         if (!key.p.key)
1606                 return -EINVAL;
1607
1608         if (info->attrs[NL80211_ATTR_MAC])
1609                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1610
1611         if (key.type == -1) {
1612                 if (mac_addr)
1613                         key.type = NL80211_KEYTYPE_PAIRWISE;
1614                 else
1615                         key.type = NL80211_KEYTYPE_GROUP;
1616         }
1617
1618         /* for now */
1619         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1620             key.type != NL80211_KEYTYPE_GROUP)
1621                 return -EINVAL;
1622
1623         if (!rdev->ops->add_key)
1624                 return -EOPNOTSUPP;
1625
1626         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1627                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1628                                            mac_addr))
1629                 return -EINVAL;
1630
1631         wdev_lock(dev->ieee80211_ptr);
1632         err = nl80211_key_allowed(dev->ieee80211_ptr);
1633         if (!err)
1634                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1635                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1636                                          mac_addr, &key.p);
1637         wdev_unlock(dev->ieee80211_ptr);
1638
1639         return err;
1640 }
1641
1642 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1643 {
1644         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1645         int err;
1646         struct net_device *dev = info->user_ptr[1];
1647         u8 *mac_addr = NULL;
1648         struct key_parse key;
1649
1650         err = nl80211_parse_key(info, &key);
1651         if (err)
1652                 return err;
1653
1654         if (info->attrs[NL80211_ATTR_MAC])
1655                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1656
1657         if (key.type == -1) {
1658                 if (mac_addr)
1659                         key.type = NL80211_KEYTYPE_PAIRWISE;
1660                 else
1661                         key.type = NL80211_KEYTYPE_GROUP;
1662         }
1663
1664         /* for now */
1665         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1666             key.type != NL80211_KEYTYPE_GROUP)
1667                 return -EINVAL;
1668
1669         if (!rdev->ops->del_key)
1670                 return -EOPNOTSUPP;
1671
1672         wdev_lock(dev->ieee80211_ptr);
1673         err = nl80211_key_allowed(dev->ieee80211_ptr);
1674
1675         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1676             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1677                 err = -ENOENT;
1678
1679         if (!err)
1680                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1681                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1682                                          mac_addr);
1683
1684 #ifdef CONFIG_CFG80211_WEXT
1685         if (!err) {
1686                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1687                         dev->ieee80211_ptr->wext.default_key = -1;
1688                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1689                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1690         }
1691 #endif
1692         wdev_unlock(dev->ieee80211_ptr);
1693
1694         return err;
1695 }
1696
1697 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1698 {
1699         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1700                     struct beacon_parameters *info);
1701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1702         struct net_device *dev = info->user_ptr[1];
1703         struct beacon_parameters params;
1704         int haveinfo = 0;
1705
1706         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1707                 return -EINVAL;
1708
1709         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1710             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1711                 return -EOPNOTSUPP;
1712
1713         switch (info->genlhdr->cmd) {
1714         case NL80211_CMD_NEW_BEACON:
1715                 /* these are required for NEW_BEACON */
1716                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1717                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1718                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1719                         return -EINVAL;
1720
1721                 call = rdev->ops->add_beacon;
1722                 break;
1723         case NL80211_CMD_SET_BEACON:
1724                 call = rdev->ops->set_beacon;
1725                 break;
1726         default:
1727                 WARN_ON(1);
1728                 return -EOPNOTSUPP;
1729         }
1730
1731         if (!call)
1732                 return -EOPNOTSUPP;
1733
1734         memset(&params, 0, sizeof(params));
1735
1736         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1737                 params.interval =
1738                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1739                 haveinfo = 1;
1740         }
1741
1742         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1743                 params.dtim_period =
1744                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1745                 haveinfo = 1;
1746         }
1747
1748         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1749                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1750                 params.head_len =
1751                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1752                 haveinfo = 1;
1753         }
1754
1755         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1756                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1757                 params.tail_len =
1758                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1759                 haveinfo = 1;
1760         }
1761
1762         if (!haveinfo)
1763                 return -EINVAL;
1764
1765         return call(&rdev->wiphy, dev, &params);
1766 }
1767
1768 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1769 {
1770         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1771         struct net_device *dev = info->user_ptr[1];
1772
1773         if (!rdev->ops->del_beacon)
1774                 return -EOPNOTSUPP;
1775
1776         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1777             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1778                 return -EOPNOTSUPP;
1779
1780         return rdev->ops->del_beacon(&rdev->wiphy, dev);
1781 }
1782
1783 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1784         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1785         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1786         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1787         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1788 };
1789
1790 static int parse_station_flags(struct genl_info *info,
1791                                struct station_parameters *params)
1792 {
1793         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1794         struct nlattr *nla;
1795         int flag;
1796
1797         /*
1798          * Try parsing the new attribute first so userspace
1799          * can specify both for older kernels.
1800          */
1801         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1802         if (nla) {
1803                 struct nl80211_sta_flag_update *sta_flags;
1804
1805                 sta_flags = nla_data(nla);
1806                 params->sta_flags_mask = sta_flags->mask;
1807                 params->sta_flags_set = sta_flags->set;
1808                 if ((params->sta_flags_mask |
1809                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1810                         return -EINVAL;
1811                 return 0;
1812         }
1813
1814         /* if present, parse the old attribute */
1815
1816         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1817         if (!nla)
1818                 return 0;
1819
1820         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1821                              nla, sta_flags_policy))
1822                 return -EINVAL;
1823
1824         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1825         params->sta_flags_mask &= ~1;
1826
1827         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1828                 if (flags[flag])
1829                         params->sta_flags_set |= (1<<flag);
1830
1831         return 0;
1832 }
1833
1834 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1835                                 int flags, struct net_device *dev,
1836                                 const u8 *mac_addr, struct station_info *sinfo)
1837 {
1838         void *hdr;
1839         struct nlattr *sinfoattr, *txrate;
1840         u16 bitrate;
1841
1842         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1843         if (!hdr)
1844                 return -1;
1845
1846         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1847         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1848
1849         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1850
1851         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1852         if (!sinfoattr)
1853                 goto nla_put_failure;
1854         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1855                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1856                             sinfo->inactive_time);
1857         if (sinfo->filled & STATION_INFO_RX_BYTES)
1858                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1859                             sinfo->rx_bytes);
1860         if (sinfo->filled & STATION_INFO_TX_BYTES)
1861                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1862                             sinfo->tx_bytes);
1863         if (sinfo->filled & STATION_INFO_LLID)
1864                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1865                             sinfo->llid);
1866         if (sinfo->filled & STATION_INFO_PLID)
1867                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1868                             sinfo->plid);
1869         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1870                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1871                             sinfo->plink_state);
1872         if (sinfo->filled & STATION_INFO_SIGNAL)
1873                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1874                            sinfo->signal);
1875         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
1876                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
1877                            sinfo->signal_avg);
1878         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1879                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1880                 if (!txrate)
1881                         goto nla_put_failure;
1882
1883                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1884                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1885                 if (bitrate > 0)
1886                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1887
1888                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1889                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1890                                     sinfo->txrate.mcs);
1891                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1892                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1893                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1894                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1895
1896                 nla_nest_end(msg, txrate);
1897         }
1898         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1899                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1900                             sinfo->rx_packets);
1901         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1902                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1903                             sinfo->tx_packets);
1904         if (sinfo->filled & STATION_INFO_TX_RETRIES)
1905                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
1906                             sinfo->tx_retries);
1907         if (sinfo->filled & STATION_INFO_TX_FAILED)
1908                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
1909                             sinfo->tx_failed);
1910         nla_nest_end(msg, sinfoattr);
1911
1912         return genlmsg_end(msg, hdr);
1913
1914  nla_put_failure:
1915         genlmsg_cancel(msg, hdr);
1916         return -EMSGSIZE;
1917 }
1918
1919 static int nl80211_dump_station(struct sk_buff *skb,
1920                                 struct netlink_callback *cb)
1921 {
1922         struct station_info sinfo;
1923         struct cfg80211_registered_device *dev;
1924         struct net_device *netdev;
1925         u8 mac_addr[ETH_ALEN];
1926         int sta_idx = cb->args[1];
1927         int err;
1928
1929         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
1930         if (err)
1931                 return err;
1932
1933         if (!dev->ops->dump_station) {
1934                 err = -EOPNOTSUPP;
1935                 goto out_err;
1936         }
1937
1938         while (1) {
1939                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1940                                              mac_addr, &sinfo);
1941                 if (err == -ENOENT)
1942                         break;
1943                 if (err)
1944                         goto out_err;
1945
1946                 if (nl80211_send_station(skb,
1947                                 NETLINK_CB(cb->skb).pid,
1948                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1949                                 netdev, mac_addr,
1950                                 &sinfo) < 0)
1951                         goto out;
1952
1953                 sta_idx++;
1954         }
1955
1956
1957  out:
1958         cb->args[1] = sta_idx;
1959         err = skb->len;
1960  out_err:
1961         nl80211_finish_netdev_dump(dev);
1962
1963         return err;
1964 }
1965
1966 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1967 {
1968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1969         struct net_device *dev = info->user_ptr[1];
1970         struct station_info sinfo;
1971         struct sk_buff *msg;
1972         u8 *mac_addr = NULL;
1973         int err;
1974
1975         memset(&sinfo, 0, sizeof(sinfo));
1976
1977         if (!info->attrs[NL80211_ATTR_MAC])
1978                 return -EINVAL;
1979
1980         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1981
1982         if (!rdev->ops->get_station)
1983                 return -EOPNOTSUPP;
1984
1985         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1986         if (err)
1987                 return err;
1988
1989         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1990         if (!msg)
1991                 return -ENOMEM;
1992
1993         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1994                                  dev, mac_addr, &sinfo) < 0) {
1995                 nlmsg_free(msg);
1996                 return -ENOBUFS;
1997         }
1998
1999         return genlmsg_reply(msg, info);
2000 }
2001
2002 /*
2003  * Get vlan interface making sure it is running and on the right wiphy.
2004  */
2005 static int get_vlan(struct genl_info *info,
2006                     struct cfg80211_registered_device *rdev,
2007                     struct net_device **vlan)
2008 {
2009         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2010         *vlan = NULL;
2011
2012         if (vlanattr) {
2013                 *vlan = dev_get_by_index(genl_info_net(info),
2014                                          nla_get_u32(vlanattr));
2015                 if (!*vlan)
2016                         return -ENODEV;
2017                 if (!(*vlan)->ieee80211_ptr)
2018                         return -EINVAL;
2019                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2020                         return -EINVAL;
2021                 if (!netif_running(*vlan))
2022                         return -ENETDOWN;
2023         }
2024         return 0;
2025 }
2026
2027 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2028 {
2029         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2030         int err;
2031         struct net_device *dev = info->user_ptr[1];
2032         struct station_parameters params;
2033         u8 *mac_addr = NULL;
2034
2035         memset(&params, 0, sizeof(params));
2036
2037         params.listen_interval = -1;
2038
2039         if (info->attrs[NL80211_ATTR_STA_AID])
2040                 return -EINVAL;
2041
2042         if (!info->attrs[NL80211_ATTR_MAC])
2043                 return -EINVAL;
2044
2045         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2046
2047         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2048                 params.supported_rates =
2049                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2050                 params.supported_rates_len =
2051                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2052         }
2053
2054         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2055                 params.listen_interval =
2056                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2057
2058         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2059                 params.ht_capa =
2060                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2061
2062         if (parse_station_flags(info, &params))
2063                 return -EINVAL;
2064
2065         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2066                 params.plink_action =
2067                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2068
2069         err = get_vlan(info, rdev, &params.vlan);
2070         if (err)
2071                 goto out;
2072
2073         /* validate settings */
2074         err = 0;
2075
2076         switch (dev->ieee80211_ptr->iftype) {
2077         case NL80211_IFTYPE_AP:
2078         case NL80211_IFTYPE_AP_VLAN:
2079         case NL80211_IFTYPE_P2P_GO:
2080                 /* disallow mesh-specific things */
2081                 if (params.plink_action)
2082                         err = -EINVAL;
2083                 break;
2084         case NL80211_IFTYPE_P2P_CLIENT:
2085         case NL80211_IFTYPE_STATION:
2086                 /* disallow everything but AUTHORIZED flag */
2087                 if (params.plink_action)
2088                         err = -EINVAL;
2089                 if (params.vlan)
2090                         err = -EINVAL;
2091                 if (params.supported_rates)
2092                         err = -EINVAL;
2093                 if (params.ht_capa)
2094                         err = -EINVAL;
2095                 if (params.listen_interval >= 0)
2096                         err = -EINVAL;
2097                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2098                         err = -EINVAL;
2099                 break;
2100         case NL80211_IFTYPE_MESH_POINT:
2101                 /* disallow things mesh doesn't support */
2102                 if (params.vlan)
2103                         err = -EINVAL;
2104                 if (params.ht_capa)
2105                         err = -EINVAL;
2106                 if (params.listen_interval >= 0)
2107                         err = -EINVAL;
2108                 if (params.supported_rates)
2109                         err = -EINVAL;
2110                 if (params.sta_flags_mask)
2111                         err = -EINVAL;
2112                 break;
2113         default:
2114                 err = -EINVAL;
2115         }
2116
2117         if (err)
2118                 goto out;
2119
2120         if (!rdev->ops->change_station) {
2121                 err = -EOPNOTSUPP;
2122                 goto out;
2123         }
2124
2125         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2126
2127  out:
2128         if (params.vlan)
2129                 dev_put(params.vlan);
2130
2131         return err;
2132 }
2133
2134 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2135 {
2136         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2137         int err;
2138         struct net_device *dev = info->user_ptr[1];
2139         struct station_parameters params;
2140         u8 *mac_addr = NULL;
2141
2142         memset(&params, 0, sizeof(params));
2143
2144         if (!info->attrs[NL80211_ATTR_MAC])
2145                 return -EINVAL;
2146
2147         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2148                 return -EINVAL;
2149
2150         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2151                 return -EINVAL;
2152
2153         if (!info->attrs[NL80211_ATTR_STA_AID])
2154                 return -EINVAL;
2155
2156         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2157         params.supported_rates =
2158                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2159         params.supported_rates_len =
2160                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2161         params.listen_interval =
2162                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2163
2164         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2165         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2166                 return -EINVAL;
2167
2168         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2169                 params.ht_capa =
2170                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2171
2172         if (parse_station_flags(info, &params))
2173                 return -EINVAL;
2174
2175         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2176             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2177             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2178                 return -EINVAL;
2179
2180         err = get_vlan(info, rdev, &params.vlan);
2181         if (err)
2182                 goto out;
2183
2184         /* validate settings */
2185         err = 0;
2186
2187         if (!rdev->ops->add_station) {
2188                 err = -EOPNOTSUPP;
2189                 goto out;
2190         }
2191
2192         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2193
2194  out:
2195         if (params.vlan)
2196                 dev_put(params.vlan);
2197         return err;
2198 }
2199
2200 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2201 {
2202         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2203         struct net_device *dev = info->user_ptr[1];
2204         u8 *mac_addr = NULL;
2205
2206         if (info->attrs[NL80211_ATTR_MAC])
2207                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2208
2209         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2210             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2211             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2212             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2213                 return -EINVAL;
2214
2215         if (!rdev->ops->del_station)
2216                 return -EOPNOTSUPP;
2217
2218         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2219 }
2220
2221 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2222                                 int flags, struct net_device *dev,
2223                                 u8 *dst, u8 *next_hop,
2224                                 struct mpath_info *pinfo)
2225 {
2226         void *hdr;
2227         struct nlattr *pinfoattr;
2228
2229         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2230         if (!hdr)
2231                 return -1;
2232
2233         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2234         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2235         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2236
2237         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2238
2239         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2240         if (!pinfoattr)
2241                 goto nla_put_failure;
2242         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2243                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2244                             pinfo->frame_qlen);
2245         if (pinfo->filled & MPATH_INFO_SN)
2246                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2247                             pinfo->sn);
2248         if (pinfo->filled & MPATH_INFO_METRIC)
2249                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2250                             pinfo->metric);
2251         if (pinfo->filled & MPATH_INFO_EXPTIME)
2252                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2253                             pinfo->exptime);
2254         if (pinfo->filled & MPATH_INFO_FLAGS)
2255                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2256                             pinfo->flags);
2257         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2258                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2259                             pinfo->discovery_timeout);
2260         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2261                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2262                             pinfo->discovery_retries);
2263
2264         nla_nest_end(msg, pinfoattr);
2265
2266         return genlmsg_end(msg, hdr);
2267
2268  nla_put_failure:
2269         genlmsg_cancel(msg, hdr);
2270         return -EMSGSIZE;
2271 }
2272
2273 static int nl80211_dump_mpath(struct sk_buff *skb,
2274                               struct netlink_callback *cb)
2275 {
2276         struct mpath_info pinfo;
2277         struct cfg80211_registered_device *dev;
2278         struct net_device *netdev;
2279         u8 dst[ETH_ALEN];
2280         u8 next_hop[ETH_ALEN];
2281         int path_idx = cb->args[1];
2282         int err;
2283
2284         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2285         if (err)
2286                 return err;
2287
2288         if (!dev->ops->dump_mpath) {
2289                 err = -EOPNOTSUPP;
2290                 goto out_err;
2291         }
2292
2293         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2294                 err = -EOPNOTSUPP;
2295                 goto out_err;
2296         }
2297
2298         while (1) {
2299                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2300                                            dst, next_hop, &pinfo);
2301                 if (err == -ENOENT)
2302                         break;
2303                 if (err)
2304                         goto out_err;
2305
2306                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2307                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2308                                        netdev, dst, next_hop,
2309                                        &pinfo) < 0)
2310                         goto out;
2311
2312                 path_idx++;
2313         }
2314
2315
2316  out:
2317         cb->args[1] = path_idx;
2318         err = skb->len;
2319  out_err:
2320         nl80211_finish_netdev_dump(dev);
2321         return err;
2322 }
2323
2324 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2325 {
2326         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2327         int err;
2328         struct net_device *dev = info->user_ptr[1];
2329         struct mpath_info pinfo;
2330         struct sk_buff *msg;
2331         u8 *dst = NULL;
2332         u8 next_hop[ETH_ALEN];
2333
2334         memset(&pinfo, 0, sizeof(pinfo));
2335
2336         if (!info->attrs[NL80211_ATTR_MAC])
2337                 return -EINVAL;
2338
2339         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2340
2341         if (!rdev->ops->get_mpath)
2342                 return -EOPNOTSUPP;
2343
2344         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2345                 return -EOPNOTSUPP;
2346
2347         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2348         if (err)
2349                 return err;
2350
2351         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2352         if (!msg)
2353                 return -ENOMEM;
2354
2355         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2356                                  dev, dst, next_hop, &pinfo) < 0) {
2357                 nlmsg_free(msg);
2358                 return -ENOBUFS;
2359         }
2360
2361         return genlmsg_reply(msg, info);
2362 }
2363
2364 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2365 {
2366         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2367         struct net_device *dev = info->user_ptr[1];
2368         u8 *dst = NULL;
2369         u8 *next_hop = NULL;
2370
2371         if (!info->attrs[NL80211_ATTR_MAC])
2372                 return -EINVAL;
2373
2374         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2375                 return -EINVAL;
2376
2377         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2378         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2379
2380         if (!rdev->ops->change_mpath)
2381                 return -EOPNOTSUPP;
2382
2383         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2384                 return -EOPNOTSUPP;
2385
2386         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2387 }
2388
2389 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2390 {
2391         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2392         struct net_device *dev = info->user_ptr[1];
2393         u8 *dst = NULL;
2394         u8 *next_hop = NULL;
2395
2396         if (!info->attrs[NL80211_ATTR_MAC])
2397                 return -EINVAL;
2398
2399         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2400                 return -EINVAL;
2401
2402         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2403         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2404
2405         if (!rdev->ops->add_mpath)
2406                 return -EOPNOTSUPP;
2407
2408         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2409                 return -EOPNOTSUPP;
2410
2411         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2412 }
2413
2414 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2415 {
2416         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2417         struct net_device *dev = info->user_ptr[1];
2418         u8 *dst = NULL;
2419
2420         if (info->attrs[NL80211_ATTR_MAC])
2421                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2422
2423         if (!rdev->ops->del_mpath)
2424                 return -EOPNOTSUPP;
2425
2426         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2427 }
2428
2429 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2430 {
2431         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2432         struct net_device *dev = info->user_ptr[1];
2433         struct bss_parameters params;
2434
2435         memset(&params, 0, sizeof(params));
2436         /* default to not changing parameters */
2437         params.use_cts_prot = -1;
2438         params.use_short_preamble = -1;
2439         params.use_short_slot_time = -1;
2440         params.ap_isolate = -1;
2441
2442         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2443                 params.use_cts_prot =
2444                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2445         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2446                 params.use_short_preamble =
2447                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2448         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2449                 params.use_short_slot_time =
2450                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2451         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2452                 params.basic_rates =
2453                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2454                 params.basic_rates_len =
2455                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2456         }
2457         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2458                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2459
2460         if (!rdev->ops->change_bss)
2461                 return -EOPNOTSUPP;
2462
2463         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2464             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2465                 return -EOPNOTSUPP;
2466
2467         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2468 }
2469
2470 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2471         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2472         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2473         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2474         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2475         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2476         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2477 };
2478
2479 static int parse_reg_rule(struct nlattr *tb[],
2480         struct ieee80211_reg_rule *reg_rule)
2481 {
2482         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2483         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2484
2485         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2486                 return -EINVAL;
2487         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2488                 return -EINVAL;
2489         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2490                 return -EINVAL;
2491         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2492                 return -EINVAL;
2493         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2494                 return -EINVAL;
2495
2496         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2497
2498         freq_range->start_freq_khz =
2499                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2500         freq_range->end_freq_khz =
2501                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2502         freq_range->max_bandwidth_khz =
2503                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2504
2505         power_rule->max_eirp =
2506                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2507
2508         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2509                 power_rule->max_antenna_gain =
2510                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2511
2512         return 0;
2513 }
2514
2515 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2516 {
2517         int r;
2518         char *data = NULL;
2519
2520         /*
2521          * You should only get this when cfg80211 hasn't yet initialized
2522          * completely when built-in to the kernel right between the time
2523          * window between nl80211_init() and regulatory_init(), if that is
2524          * even possible.
2525          */
2526         mutex_lock(&cfg80211_mutex);
2527         if (unlikely(!cfg80211_regdomain)) {
2528                 mutex_unlock(&cfg80211_mutex);
2529                 return -EINPROGRESS;
2530         }
2531         mutex_unlock(&cfg80211_mutex);
2532
2533         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2534                 return -EINVAL;
2535
2536         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2537
2538         r = regulatory_hint_user(data);
2539
2540         return r;
2541 }
2542
2543 static int nl80211_get_mesh_params(struct sk_buff *skb,
2544         struct genl_info *info)
2545 {
2546         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2547         struct mesh_config cur_params;
2548         int err;
2549         struct net_device *dev = info->user_ptr[1];
2550         void *hdr;
2551         struct nlattr *pinfoattr;
2552         struct sk_buff *msg;
2553
2554         if (!rdev->ops->get_mesh_params)
2555                 return -EOPNOTSUPP;
2556
2557         /* Get the mesh params */
2558         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2559         if (err)
2560                 return err;
2561
2562         /* Draw up a netlink message to send back */
2563         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2564         if (!msg)
2565                 return -ENOMEM;
2566         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2567                              NL80211_CMD_GET_MESH_PARAMS);
2568         if (!hdr)
2569                 goto nla_put_failure;
2570         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2571         if (!pinfoattr)
2572                 goto nla_put_failure;
2573         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2574         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2575                         cur_params.dot11MeshRetryTimeout);
2576         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2577                         cur_params.dot11MeshConfirmTimeout);
2578         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2579                         cur_params.dot11MeshHoldingTimeout);
2580         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2581                         cur_params.dot11MeshMaxPeerLinks);
2582         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2583                         cur_params.dot11MeshMaxRetries);
2584         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2585                         cur_params.dot11MeshTTL);
2586         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2587                         cur_params.auto_open_plinks);
2588         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2589                         cur_params.dot11MeshHWMPmaxPREQretries);
2590         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2591                         cur_params.path_refresh_time);
2592         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2593                         cur_params.min_discovery_timeout);
2594         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2595                         cur_params.dot11MeshHWMPactivePathTimeout);
2596         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2597                         cur_params.dot11MeshHWMPpreqMinInterval);
2598         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2599                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2600         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2601                         cur_params.dot11MeshHWMPRootMode);
2602         nla_nest_end(msg, pinfoattr);
2603         genlmsg_end(msg, hdr);
2604         return genlmsg_reply(msg, info);
2605
2606  nla_put_failure:
2607         genlmsg_cancel(msg, hdr);
2608         nlmsg_free(msg);
2609         return -ENOBUFS;
2610 }
2611
2612 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2613 do {\
2614         if (table[attr_num]) {\
2615                 cfg.param = nla_fn(table[attr_num]); \
2616                 mask |= (1 << (attr_num - 1)); \
2617         } \
2618 } while (0);\
2619
2620 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2621         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2622         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2623         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2624         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2625         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2626         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2627         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2628
2629         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2630         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2631         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2632         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2633         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2634         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2635 };
2636
2637 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2638 {
2639         u32 mask;
2640         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2641         struct net_device *dev = info->user_ptr[1];
2642         struct mesh_config cfg;
2643         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2644         struct nlattr *parent_attr;
2645
2646         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2647         if (!parent_attr)
2648                 return -EINVAL;
2649         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2650                         parent_attr, nl80211_meshconf_params_policy))
2651                 return -EINVAL;
2652
2653         if (!rdev->ops->set_mesh_params)
2654                 return -EOPNOTSUPP;
2655
2656         /* This makes sure that there aren't more than 32 mesh config
2657          * parameters (otherwise our bitfield scheme would not work.) */
2658         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2659
2660         /* Fill in the params struct */
2661         mask = 0;
2662         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2663                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2664         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2665                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2666         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2667                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2668         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2669                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2670         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2671                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2673                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2674         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2675                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2676         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2677                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2678                         nla_get_u8);
2679         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2680                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2681         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2682                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2683                         nla_get_u16);
2684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2685                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2686                         nla_get_u32);
2687         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2688                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2689                         nla_get_u16);
2690         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2691                         dot11MeshHWMPnetDiameterTraversalTime,
2692                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2693                         nla_get_u16);
2694         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2695                         dot11MeshHWMPRootMode, mask,
2696                         NL80211_MESHCONF_HWMP_ROOTMODE,
2697                         nla_get_u8);
2698
2699         /* Apply changes */
2700         return rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2701 }
2702
2703 #undef FILL_IN_MESH_PARAM_IF_SET
2704
2705 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2706 {
2707         struct sk_buff *msg;
2708         void *hdr = NULL;
2709         struct nlattr *nl_reg_rules;
2710         unsigned int i;
2711         int err = -EINVAL;
2712
2713         mutex_lock(&cfg80211_mutex);
2714
2715         if (!cfg80211_regdomain)
2716                 goto out;
2717
2718         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2719         if (!msg) {
2720                 err = -ENOBUFS;
2721                 goto out;
2722         }
2723
2724         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2725                              NL80211_CMD_GET_REG);
2726         if (!hdr)
2727                 goto nla_put_failure;
2728
2729         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2730                 cfg80211_regdomain->alpha2);
2731
2732         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2733         if (!nl_reg_rules)
2734                 goto nla_put_failure;
2735
2736         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2737                 struct nlattr *nl_reg_rule;
2738                 const struct ieee80211_reg_rule *reg_rule;
2739                 const struct ieee80211_freq_range *freq_range;
2740                 const struct ieee80211_power_rule *power_rule;
2741
2742                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2743                 freq_range = &reg_rule->freq_range;
2744                 power_rule = &reg_rule->power_rule;
2745
2746                 nl_reg_rule = nla_nest_start(msg, i);
2747                 if (!nl_reg_rule)
2748                         goto nla_put_failure;
2749
2750                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2751                         reg_rule->flags);
2752                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2753                         freq_range->start_freq_khz);
2754                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2755                         freq_range->end_freq_khz);
2756                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2757                         freq_range->max_bandwidth_khz);
2758                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2759                         power_rule->max_antenna_gain);
2760                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2761                         power_rule->max_eirp);
2762
2763                 nla_nest_end(msg, nl_reg_rule);
2764         }
2765
2766         nla_nest_end(msg, nl_reg_rules);
2767
2768         genlmsg_end(msg, hdr);
2769         err = genlmsg_reply(msg, info);
2770         goto out;
2771
2772 nla_put_failure:
2773         genlmsg_cancel(msg, hdr);
2774         nlmsg_free(msg);
2775         err = -EMSGSIZE;
2776 out:
2777         mutex_unlock(&cfg80211_mutex);
2778         return err;
2779 }
2780
2781 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2782 {
2783         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2784         struct nlattr *nl_reg_rule;
2785         char *alpha2 = NULL;
2786         int rem_reg_rules = 0, r = 0;
2787         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2788         struct ieee80211_regdomain *rd = NULL;
2789
2790         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2791                 return -EINVAL;
2792
2793         if (!info->attrs[NL80211_ATTR_REG_RULES])
2794                 return -EINVAL;
2795
2796         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2797
2798         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2799                         rem_reg_rules) {
2800                 num_rules++;
2801                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2802                         return -EINVAL;
2803         }
2804
2805         mutex_lock(&cfg80211_mutex);
2806
2807         if (!reg_is_valid_request(alpha2)) {
2808                 r = -EINVAL;
2809                 goto bad_reg;
2810         }
2811
2812         size_of_regd = sizeof(struct ieee80211_regdomain) +
2813                 (num_rules * sizeof(struct ieee80211_reg_rule));
2814
2815         rd = kzalloc(size_of_regd, GFP_KERNEL);
2816         if (!rd) {
2817                 r = -ENOMEM;
2818                 goto bad_reg;
2819         }
2820
2821         rd->n_reg_rules = num_rules;
2822         rd->alpha2[0] = alpha2[0];
2823         rd->alpha2[1] = alpha2[1];
2824
2825         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2826                         rem_reg_rules) {
2827                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2828                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2829                         reg_rule_policy);
2830                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2831                 if (r)
2832                         goto bad_reg;
2833
2834                 rule_idx++;
2835
2836                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2837                         r = -EINVAL;
2838                         goto bad_reg;
2839                 }
2840         }
2841
2842         BUG_ON(rule_idx != num_rules);
2843
2844         r = set_regdom(rd);
2845
2846         mutex_unlock(&cfg80211_mutex);
2847
2848         return r;
2849
2850  bad_reg:
2851         mutex_unlock(&cfg80211_mutex);
2852         kfree(rd);
2853         return r;
2854 }
2855
2856 static int validate_scan_freqs(struct nlattr *freqs)
2857 {
2858         struct nlattr *attr1, *attr2;
2859         int n_channels = 0, tmp1, tmp2;
2860
2861         nla_for_each_nested(attr1, freqs, tmp1) {
2862                 n_channels++;
2863                 /*
2864                  * Some hardware has a limited channel list for
2865                  * scanning, and it is pretty much nonsensical
2866                  * to scan for a channel twice, so disallow that
2867                  * and don't require drivers to check that the
2868                  * channel list they get isn't longer than what
2869                  * they can scan, as long as they can scan all
2870                  * the channels they registered at once.
2871                  */
2872                 nla_for_each_nested(attr2, freqs, tmp2)
2873                         if (attr1 != attr2 &&
2874                             nla_get_u32(attr1) == nla_get_u32(attr2))
2875                                 return 0;
2876         }
2877
2878         return n_channels;
2879 }
2880
2881 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2882 {
2883         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2884         struct net_device *dev = info->user_ptr[1];
2885         struct cfg80211_scan_request *request;
2886         struct cfg80211_ssid *ssid;
2887         struct ieee80211_channel *channel;
2888         struct nlattr *attr;
2889         struct wiphy *wiphy;
2890         int err, tmp, n_ssids = 0, n_channels, i;
2891         enum ieee80211_band band;
2892         size_t ie_len;
2893
2894         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2895                 return -EINVAL;
2896
2897         wiphy = &rdev->wiphy;
2898
2899         if (!rdev->ops->scan)
2900                 return -EOPNOTSUPP;
2901
2902         if (rdev->scan_req)
2903                 return -EBUSY;
2904
2905         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2906                 n_channels = validate_scan_freqs(
2907                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2908                 if (!n_channels)
2909                         return -EINVAL;
2910         } else {
2911                 n_channels = 0;
2912
2913                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2914                         if (wiphy->bands[band])
2915                                 n_channels += wiphy->bands[band]->n_channels;
2916         }
2917
2918         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2919                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2920                         n_ssids++;
2921
2922         if (n_ssids > wiphy->max_scan_ssids)
2923                 return -EINVAL;
2924
2925         if (info->attrs[NL80211_ATTR_IE])
2926                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2927         else
2928                 ie_len = 0;
2929
2930         if (ie_len > wiphy->max_scan_ie_len)
2931                 return -EINVAL;
2932
2933         request = kzalloc(sizeof(*request)
2934                         + sizeof(*ssid) * n_ssids
2935                         + sizeof(channel) * n_channels
2936                         + ie_len, GFP_KERNEL);
2937         if (!request)
2938                 return -ENOMEM;
2939
2940         if (n_ssids)
2941                 request->ssids = (void *)&request->channels[n_channels];
2942         request->n_ssids = n_ssids;
2943         if (ie_len) {
2944                 if (request->ssids)
2945                         request->ie = (void *)(request->ssids + n_ssids);
2946                 else
2947                         request->ie = (void *)(request->channels + n_channels);
2948         }
2949
2950         i = 0;
2951         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2952                 /* user specified, bail out if channel not found */
2953                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2954                         struct ieee80211_channel *chan;
2955
2956                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2957
2958                         if (!chan) {
2959                                 err = -EINVAL;
2960                                 goto out_free;
2961                         }
2962
2963                         /* ignore disabled channels */
2964                         if (chan->flags & IEEE80211_CHAN_DISABLED)
2965                                 continue;
2966
2967                         request->channels[i] = chan;
2968                         i++;
2969                 }
2970         } else {
2971                 /* all channels */
2972                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2973                         int j;
2974                         if (!wiphy->bands[band])
2975                                 continue;
2976                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2977                                 struct ieee80211_channel *chan;
2978
2979                                 chan = &wiphy->bands[band]->channels[j];
2980
2981                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
2982                                         continue;
2983
2984                                 request->channels[i] = chan;
2985                                 i++;
2986                         }
2987                 }
2988         }
2989
2990         if (!i) {
2991                 err = -EINVAL;
2992                 goto out_free;
2993         }
2994
2995         request->n_channels = i;
2996
2997         i = 0;
2998         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2999                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3000                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3001                                 err = -EINVAL;
3002                                 goto out_free;
3003                         }
3004                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3005                         request->ssids[i].ssid_len = nla_len(attr);
3006                         i++;
3007                 }
3008         }
3009
3010         if (info->attrs[NL80211_ATTR_IE]) {
3011                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3012                 memcpy((void *)request->ie,
3013                        nla_data(info->attrs[NL80211_ATTR_IE]),
3014                        request->ie_len);
3015         }
3016
3017         request->dev = dev;
3018         request->wiphy = &rdev->wiphy;
3019
3020         rdev->scan_req = request;
3021         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3022
3023         if (!err) {
3024                 nl80211_send_scan_start(rdev, dev);
3025                 dev_hold(dev);
3026         } else {
3027  out_free:
3028                 rdev->scan_req = NULL;
3029                 kfree(request);
3030         }
3031
3032         return err;
3033 }
3034
3035 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3036                             struct cfg80211_registered_device *rdev,
3037                             struct wireless_dev *wdev,
3038                             struct cfg80211_internal_bss *intbss)
3039 {
3040         struct cfg80211_bss *res = &intbss->pub;
3041         void *hdr;
3042         struct nlattr *bss;
3043         int i;
3044
3045         ASSERT_WDEV_LOCK(wdev);
3046
3047         hdr = nl80211hdr_put(msg, pid, seq, flags,
3048                              NL80211_CMD_NEW_SCAN_RESULTS);
3049         if (!hdr)
3050                 return -1;
3051
3052         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3053         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3054
3055         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3056         if (!bss)
3057                 goto nla_put_failure;
3058         if (!is_zero_ether_addr(res->bssid))
3059                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3060         if (res->information_elements && res->len_information_elements)
3061                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3062                         res->len_information_elements,
3063                         res->information_elements);
3064         if (res->beacon_ies && res->len_beacon_ies &&
3065             res->beacon_ies != res->information_elements)
3066                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3067                         res->len_beacon_ies, res->beacon_ies);
3068         if (res->tsf)
3069                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3070         if (res->beacon_interval)
3071                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3072         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3073         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3074         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3075                 jiffies_to_msecs(jiffies - intbss->ts));
3076
3077         switch (rdev->wiphy.signal_type) {
3078         case CFG80211_SIGNAL_TYPE_MBM:
3079                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3080                 break;
3081         case CFG80211_SIGNAL_TYPE_UNSPEC:
3082                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3083                 break;
3084         default:
3085                 break;
3086         }
3087
3088         switch (wdev->iftype) {
3089         case NL80211_IFTYPE_P2P_CLIENT:
3090         case NL80211_IFTYPE_STATION:
3091                 if (intbss == wdev->current_bss)
3092                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3093                                     NL80211_BSS_STATUS_ASSOCIATED);
3094                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3095                         if (intbss != wdev->auth_bsses[i])
3096                                 continue;
3097                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3098                                     NL80211_BSS_STATUS_AUTHENTICATED);
3099                         break;
3100                 }
3101                 break;
3102         case NL80211_IFTYPE_ADHOC:
3103                 if (intbss == wdev->current_bss)
3104                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3105                                     NL80211_BSS_STATUS_IBSS_JOINED);
3106                 break;
3107         default:
3108                 break;
3109         }
3110
3111         nla_nest_end(msg, bss);
3112
3113         return genlmsg_end(msg, hdr);
3114
3115  nla_put_failure:
3116         genlmsg_cancel(msg, hdr);
3117         return -EMSGSIZE;
3118 }
3119
3120 static int nl80211_dump_scan(struct sk_buff *skb,
3121                              struct netlink_callback *cb)
3122 {
3123         struct cfg80211_registered_device *rdev;
3124         struct net_device *dev;
3125         struct cfg80211_internal_bss *scan;
3126         struct wireless_dev *wdev;
3127         int start = cb->args[1], idx = 0;
3128         int err;
3129
3130         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3131         if (err)
3132                 return err;
3133
3134         wdev = dev->ieee80211_ptr;
3135
3136         wdev_lock(wdev);
3137         spin_lock_bh(&rdev->bss_lock);
3138         cfg80211_bss_expire(rdev);
3139
3140         list_for_each_entry(scan, &rdev->bss_list, list) {
3141                 if (++idx <= start)
3142                         continue;
3143                 if (nl80211_send_bss(skb,
3144                                 NETLINK_CB(cb->skb).pid,
3145                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3146                                 rdev, wdev, scan) < 0) {
3147                         idx--;
3148                         break;
3149                 }
3150         }
3151
3152         spin_unlock_bh(&rdev->bss_lock);
3153         wdev_unlock(wdev);
3154
3155         cb->args[1] = idx;
3156         nl80211_finish_netdev_dump(rdev);
3157
3158         return skb->len;
3159 }
3160
3161 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3162                                 int flags, struct net_device *dev,
3163                                 struct survey_info *survey)
3164 {
3165         void *hdr;
3166         struct nlattr *infoattr;
3167
3168         /* Survey without a channel doesn't make sense */
3169         if (!survey->channel)
3170                 return -EINVAL;
3171
3172         hdr = nl80211hdr_put(msg, pid, seq, flags,
3173                              NL80211_CMD_NEW_SURVEY_RESULTS);
3174         if (!hdr)
3175                 return -ENOMEM;
3176
3177         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3178
3179         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3180         if (!infoattr)
3181                 goto nla_put_failure;
3182
3183         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3184                     survey->channel->center_freq);
3185         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3186                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3187                             survey->noise);
3188         if (survey->filled & SURVEY_INFO_IN_USE)
3189                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3190         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3191                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3192                             survey->channel_time);
3193         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3194                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3195                             survey->channel_time_busy);
3196         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3197                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3198                             survey->channel_time_ext_busy);
3199         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3200                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3201                             survey->channel_time_rx);
3202         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3203                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3204                             survey->channel_time_tx);
3205
3206         nla_nest_end(msg, infoattr);
3207
3208         return genlmsg_end(msg, hdr);
3209
3210  nla_put_failure:
3211         genlmsg_cancel(msg, hdr);
3212         return -EMSGSIZE;
3213 }
3214
3215 static int nl80211_dump_survey(struct sk_buff *skb,
3216                         struct netlink_callback *cb)
3217 {
3218         struct survey_info survey;
3219         struct cfg80211_registered_device *dev;
3220         struct net_device *netdev;
3221         int survey_idx = cb->args[1];
3222         int res;
3223
3224         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3225         if (res)
3226                 return res;
3227
3228         if (!dev->ops->dump_survey) {
3229                 res = -EOPNOTSUPP;
3230                 goto out_err;
3231         }
3232
3233         while (1) {
3234                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3235                                             &survey);
3236                 if (res == -ENOENT)
3237                         break;
3238                 if (res)
3239                         goto out_err;
3240
3241                 if (nl80211_send_survey(skb,
3242                                 NETLINK_CB(cb->skb).pid,
3243                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3244                                 netdev,
3245                                 &survey) < 0)
3246                         goto out;
3247                 survey_idx++;
3248         }
3249
3250  out:
3251         cb->args[1] = survey_idx;
3252         res = skb->len;
3253  out_err:
3254         nl80211_finish_netdev_dump(dev);
3255         return res;
3256 }
3257
3258 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3259 {
3260         return auth_type <= NL80211_AUTHTYPE_MAX;
3261 }
3262
3263 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3264 {
3265         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3266                                   NL80211_WPA_VERSION_2));
3267 }
3268
3269 static bool nl80211_valid_akm_suite(u32 akm)
3270 {
3271         return akm == WLAN_AKM_SUITE_8021X ||
3272                 akm == WLAN_AKM_SUITE_PSK;
3273 }
3274
3275 static bool nl80211_valid_cipher_suite(u32 cipher)
3276 {
3277         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3278                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3279                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3280                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3281                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3282 }
3283
3284
3285 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3286 {
3287         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3288         struct net_device *dev = info->user_ptr[1];
3289         struct ieee80211_channel *chan;
3290         const u8 *bssid, *ssid, *ie = NULL;
3291         int err, ssid_len, ie_len = 0;
3292         enum nl80211_auth_type auth_type;
3293         struct key_parse key;
3294         bool local_state_change;
3295
3296         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3297                 return -EINVAL;
3298
3299         if (!info->attrs[NL80211_ATTR_MAC])
3300                 return -EINVAL;
3301
3302         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3303                 return -EINVAL;
3304
3305         if (!info->attrs[NL80211_ATTR_SSID])
3306                 return -EINVAL;
3307
3308         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3309                 return -EINVAL;
3310
3311         err = nl80211_parse_key(info, &key);
3312         if (err)
3313                 return err;
3314
3315         if (key.idx >= 0) {
3316                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3317                         return -EINVAL;
3318                 if (!key.p.key || !key.p.key_len)
3319                         return -EINVAL;
3320                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3321                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3322                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3323                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3324                         return -EINVAL;
3325                 if (key.idx > 4)
3326                         return -EINVAL;
3327         } else {
3328                 key.p.key_len = 0;
3329                 key.p.key = NULL;
3330         }
3331
3332         if (key.idx >= 0) {
3333                 int i;
3334                 bool ok = false;
3335                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3336                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3337                                 ok = true;
3338                                 break;
3339                         }
3340                 }
3341                 if (!ok)
3342                         return -EINVAL;
3343         }
3344
3345         if (!rdev->ops->auth)
3346                 return -EOPNOTSUPP;
3347
3348         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3349             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3350                 return -EOPNOTSUPP;
3351
3352         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3353         chan = ieee80211_get_channel(&rdev->wiphy,
3354                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3355         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3356                 return -EINVAL;
3357
3358         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3359         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3360
3361         if (info->attrs[NL80211_ATTR_IE]) {
3362                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3363                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3364         }
3365
3366         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3367         if (!nl80211_valid_auth_type(auth_type))
3368                 return -EINVAL;
3369
3370         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3371
3372         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3373                                   ssid, ssid_len, ie, ie_len,
3374                                   key.p.key, key.p.key_len, key.idx,
3375                                   local_state_change);
3376 }
3377
3378 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3379                                    struct genl_info *info,
3380                                    struct cfg80211_crypto_settings *settings,
3381                                    int cipher_limit)
3382 {
3383         memset(settings, 0, sizeof(*settings));
3384
3385         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3386
3387         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3388                 u16 proto;
3389                 proto = nla_get_u16(
3390                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3391                 settings->control_port_ethertype = cpu_to_be16(proto);
3392                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3393                     proto != ETH_P_PAE)
3394                         return -EINVAL;
3395                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3396                         settings->control_port_no_encrypt = true;
3397         } else
3398                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3399
3400         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3401                 void *data;
3402                 int len, i;
3403
3404                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3405                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3406                 settings->n_ciphers_pairwise = len / sizeof(u32);
3407
3408                 if (len % sizeof(u32))
3409                         return -EINVAL;
3410
3411                 if (settings->n_ciphers_pairwise > cipher_limit)
3412                         return -EINVAL;
3413
3414                 memcpy(settings->ciphers_pairwise, data, len);
3415
3416                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3417                         if (!nl80211_valid_cipher_suite(
3418                                         settings->ciphers_pairwise[i]))
3419                                 return -EINVAL;
3420         }
3421
3422         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3423                 settings->cipher_group =
3424                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3425                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3426                         return -EINVAL;
3427         }
3428
3429         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3430                 settings->wpa_versions =
3431                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3432                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3433                         return -EINVAL;
3434         }
3435
3436         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3437                 void *data;
3438                 int len, i;
3439
3440                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3441                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3442                 settings->n_akm_suites = len / sizeof(u32);
3443
3444                 if (len % sizeof(u32))
3445                         return -EINVAL;
3446
3447                 memcpy(settings->akm_suites, data, len);
3448
3449                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3450                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3451                                 return -EINVAL;
3452         }
3453
3454         return 0;
3455 }
3456
3457 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3458 {
3459         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3460         struct net_device *dev = info->user_ptr[1];
3461         struct cfg80211_crypto_settings crypto;
3462         struct ieee80211_channel *chan;
3463         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3464         int err, ssid_len, ie_len = 0;
3465         bool use_mfp = false;
3466
3467         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3468                 return -EINVAL;
3469
3470         if (!info->attrs[NL80211_ATTR_MAC] ||
3471             !info->attrs[NL80211_ATTR_SSID] ||
3472             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3473                 return -EINVAL;
3474
3475         if (!rdev->ops->assoc)
3476                 return -EOPNOTSUPP;
3477
3478         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3479             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3480                 return -EOPNOTSUPP;
3481
3482         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3483
3484         chan = ieee80211_get_channel(&rdev->wiphy,
3485                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3486         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3487                 return -EINVAL;
3488
3489         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3490         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3491
3492         if (info->attrs[NL80211_ATTR_IE]) {
3493                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3494                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3495         }
3496
3497         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3498                 enum nl80211_mfp mfp =
3499                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3500                 if (mfp == NL80211_MFP_REQUIRED)
3501                         use_mfp = true;
3502                 else if (mfp != NL80211_MFP_NO)
3503                         return -EINVAL;
3504         }
3505
3506         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3507                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3508
3509         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3510         if (!err)
3511                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3512                                           ssid, ssid_len, ie, ie_len, use_mfp,
3513                                           &crypto);
3514
3515         return err;
3516 }
3517
3518 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3519 {
3520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3521         struct net_device *dev = info->user_ptr[1];
3522         const u8 *ie = NULL, *bssid;
3523         int ie_len = 0;
3524         u16 reason_code;
3525         bool local_state_change;
3526
3527         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3528                 return -EINVAL;
3529
3530         if (!info->attrs[NL80211_ATTR_MAC])
3531                 return -EINVAL;
3532
3533         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3534                 return -EINVAL;
3535
3536         if (!rdev->ops->deauth)
3537                 return -EOPNOTSUPP;
3538
3539         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3540             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3541                 return -EOPNOTSUPP;
3542
3543         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3544
3545         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3546         if (reason_code == 0) {
3547                 /* Reason Code 0 is reserved */
3548                 return -EINVAL;
3549         }
3550
3551         if (info->attrs[NL80211_ATTR_IE]) {
3552                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3553                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3554         }
3555
3556         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3557
3558         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3559                                     local_state_change);
3560 }
3561
3562 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3563 {
3564         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3565         struct net_device *dev = info->user_ptr[1];
3566         const u8 *ie = NULL, *bssid;
3567         int ie_len = 0;
3568         u16 reason_code;
3569         bool local_state_change;
3570
3571         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3572                 return -EINVAL;
3573
3574         if (!info->attrs[NL80211_ATTR_MAC])
3575                 return -EINVAL;
3576
3577         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3578                 return -EINVAL;
3579
3580         if (!rdev->ops->disassoc)
3581                 return -EOPNOTSUPP;
3582
3583         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3584             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3585                 return -EOPNOTSUPP;
3586
3587         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3588
3589         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3590         if (reason_code == 0) {
3591                 /* Reason Code 0 is reserved */
3592                 return -EINVAL;
3593         }
3594
3595         if (info->attrs[NL80211_ATTR_IE]) {
3596                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3597                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3598         }
3599
3600         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3601
3602         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3603                                       local_state_change);
3604 }
3605
3606 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3607 {
3608         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3609         struct net_device *dev = info->user_ptr[1];
3610         struct cfg80211_ibss_params ibss;
3611         struct wiphy *wiphy;
3612         struct cfg80211_cached_keys *connkeys = NULL;
3613         int err;
3614
3615         memset(&ibss, 0, sizeof(ibss));
3616
3617         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3618                 return -EINVAL;
3619
3620         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3621             !info->attrs[NL80211_ATTR_SSID] ||
3622             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3623                 return -EINVAL;
3624
3625         ibss.beacon_interval = 100;
3626
3627         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3628                 ibss.beacon_interval =
3629                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3630                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3631                         return -EINVAL;
3632         }
3633
3634         if (!rdev->ops->join_ibss)
3635                 return -EOPNOTSUPP;
3636
3637         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3638                 return -EOPNOTSUPP;
3639
3640         wiphy = &rdev->wiphy;
3641
3642         if (info->attrs[NL80211_ATTR_MAC])
3643                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3644         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3645         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3646
3647         if (info->attrs[NL80211_ATTR_IE]) {
3648                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3649                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3650         }
3651
3652         ibss.channel = ieee80211_get_channel(wiphy,
3653                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3654         if (!ibss.channel ||
3655             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3656             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3657                 return -EINVAL;
3658
3659         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3660         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3661
3662         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3663                 u8 *rates =
3664                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3665                 int n_rates =
3666                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3667                 struct ieee80211_supported_band *sband =
3668                         wiphy->bands[ibss.channel->band];
3669                 int i, j;
3670
3671                 if (n_rates == 0)
3672                         return -EINVAL;
3673
3674                 for (i = 0; i < n_rates; i++) {
3675                         int rate = (rates[i] & 0x7f) * 5;
3676                         bool found = false;
3677
3678                         for (j = 0; j < sband->n_bitrates; j++) {
3679                                 if (sband->bitrates[j].bitrate == rate) {
3680                                         found = true;
3681                                         ibss.basic_rates |= BIT(j);
3682                                         break;
3683                                 }
3684                         }
3685                         if (!found)
3686                                 return -EINVAL;
3687                 }
3688         }
3689         if (info->attrs[NL80211_ATTR_MCAST_RATE])
3690                 ibss.mcast_rate =
3691                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
3692
3693         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3694                 connkeys = nl80211_parse_connkeys(rdev,
3695                                         info->attrs[NL80211_ATTR_KEYS]);
3696                 if (IS_ERR(connkeys))
3697                         return PTR_ERR(connkeys);
3698         }
3699
3700         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3701         if (err)
3702                 kfree(connkeys);
3703         return err;
3704 }
3705
3706 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3707 {
3708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3709         struct net_device *dev = info->user_ptr[1];
3710
3711         if (!rdev->ops->leave_ibss)
3712                 return -EOPNOTSUPP;
3713
3714         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3715                 return -EOPNOTSUPP;
3716
3717         return cfg80211_leave_ibss(rdev, dev, false);
3718 }
3719
3720 #ifdef CONFIG_NL80211_TESTMODE
3721 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3722         .name = "testmode",
3723 };
3724
3725 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3726 {
3727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3728         int err;
3729
3730         if (!info->attrs[NL80211_ATTR_TESTDATA])
3731                 return -EINVAL;
3732
3733         err = -EOPNOTSUPP;
3734         if (rdev->ops->testmode_cmd) {
3735                 rdev->testmode_info = info;
3736                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3737                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3738                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3739                 rdev->testmode_info = NULL;
3740         }
3741
3742         return err;
3743 }
3744
3745 static struct sk_buff *
3746 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3747                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3748 {
3749         struct sk_buff *skb;
3750         void *hdr;
3751         struct nlattr *data;
3752
3753         skb = nlmsg_new(approxlen + 100, gfp);
3754         if (!skb)
3755                 return NULL;
3756
3757         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3758         if (!hdr) {
3759                 kfree_skb(skb);
3760                 return NULL;
3761         }
3762
3763         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3764         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3765
3766         ((void **)skb->cb)[0] = rdev;
3767         ((void **)skb->cb)[1] = hdr;
3768         ((void **)skb->cb)[2] = data;
3769
3770         return skb;
3771
3772  nla_put_failure:
3773         kfree_skb(skb);
3774         return NULL;
3775 }
3776
3777 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3778                                                   int approxlen)
3779 {
3780         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3781
3782         if (WARN_ON(!rdev->testmode_info))
3783                 return NULL;
3784
3785         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3786                                 rdev->testmode_info->snd_pid,
3787                                 rdev->testmode_info->snd_seq,
3788                                 GFP_KERNEL);
3789 }
3790 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3791
3792 int cfg80211_testmode_reply(struct sk_buff *skb)
3793 {
3794         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3795         void *hdr = ((void **)skb->cb)[1];
3796         struct nlattr *data = ((void **)skb->cb)[2];
3797
3798         if (WARN_ON(!rdev->testmode_info)) {
3799                 kfree_skb(skb);
3800                 return -EINVAL;
3801         }
3802
3803         nla_nest_end(skb, data);
3804         genlmsg_end(skb, hdr);
3805         return genlmsg_reply(skb, rdev->testmode_info);
3806 }
3807 EXPORT_SYMBOL(cfg80211_testmode_reply);
3808
3809 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3810                                                   int approxlen, gfp_t gfp)
3811 {
3812         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3813
3814         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3815 }
3816 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3817
3818 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3819 {
3820         void *hdr = ((void **)skb->cb)[1];
3821         struct nlattr *data = ((void **)skb->cb)[2];
3822
3823         nla_nest_end(skb, data);
3824         genlmsg_end(skb, hdr);
3825         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3826 }
3827 EXPORT_SYMBOL(cfg80211_testmode_event);
3828 #endif
3829
3830 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3831 {
3832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3833         struct net_device *dev = info->user_ptr[1];
3834         struct cfg80211_connect_params connect;
3835         struct wiphy *wiphy;
3836         struct cfg80211_cached_keys *connkeys = NULL;
3837         int err;
3838
3839         memset(&connect, 0, sizeof(connect));
3840
3841         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3842                 return -EINVAL;
3843
3844         if (!info->attrs[NL80211_ATTR_SSID] ||
3845             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3846                 return -EINVAL;
3847
3848         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3849                 connect.auth_type =
3850                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3851                 if (!nl80211_valid_auth_type(connect.auth_type))
3852                         return -EINVAL;
3853         } else
3854                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3855
3856         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3857
3858         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
3859                                       NL80211_MAX_NR_CIPHER_SUITES);
3860         if (err)
3861                 return err;
3862
3863         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3864             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3865                 return -EOPNOTSUPP;
3866
3867         wiphy = &rdev->wiphy;
3868
3869         if (info->attrs[NL80211_ATTR_MAC])
3870                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3871         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3872         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3873
3874         if (info->attrs[NL80211_ATTR_IE]) {
3875                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3876                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3877         }
3878
3879         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3880                 connect.channel =
3881                         ieee80211_get_channel(wiphy,
3882                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3883                 if (!connect.channel ||
3884                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
3885                         return -EINVAL;
3886         }
3887
3888         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3889                 connkeys = nl80211_parse_connkeys(rdev,
3890                                         info->attrs[NL80211_ATTR_KEYS]);
3891                 if (IS_ERR(connkeys))
3892                         return PTR_ERR(connkeys);
3893         }
3894
3895         err = cfg80211_connect(rdev, dev, &connect, connkeys);
3896         if (err)
3897                 kfree(connkeys);
3898         return err;
3899 }
3900
3901 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
3902 {
3903         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3904         struct net_device *dev = info->user_ptr[1];
3905         u16 reason;
3906
3907         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3908                 reason = WLAN_REASON_DEAUTH_LEAVING;
3909         else
3910                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3911
3912         if (reason == 0)
3913                 return -EINVAL;
3914
3915         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3916             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3917                 return -EOPNOTSUPP;
3918
3919         return cfg80211_disconnect(rdev, dev, reason, true);
3920 }
3921
3922 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
3923 {
3924         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3925         struct net *net;
3926         int err;
3927         u32 pid;
3928
3929         if (!info->attrs[NL80211_ATTR_PID])
3930                 return -EINVAL;
3931
3932         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
3933
3934         net = get_net_ns_by_pid(pid);
3935         if (IS_ERR(net))
3936                 return PTR_ERR(net);
3937
3938         err = 0;
3939
3940         /* check if anything to do */
3941         if (!net_eq(wiphy_net(&rdev->wiphy), net))
3942                 err = cfg80211_switch_netns(rdev, net);
3943
3944         put_net(net);
3945         return err;
3946 }
3947
3948 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
3949 {
3950         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3951         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
3952                         struct cfg80211_pmksa *pmksa) = NULL;
3953         struct net_device *dev = info->user_ptr[1];
3954         struct cfg80211_pmksa pmksa;
3955
3956         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
3957
3958         if (!info->attrs[NL80211_ATTR_MAC])
3959                 return -EINVAL;
3960
3961         if (!info->attrs[NL80211_ATTR_PMKID])
3962                 return -EINVAL;
3963
3964         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
3965         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3966
3967         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3968             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3969                 return -EOPNOTSUPP;
3970
3971         switch (info->genlhdr->cmd) {
3972         case NL80211_CMD_SET_PMKSA:
3973                 rdev_ops = rdev->ops->set_pmksa;
3974                 break;
3975         case NL80211_CMD_DEL_PMKSA:
3976                 rdev_ops = rdev->ops->del_pmksa;
3977                 break;
3978         default:
3979                 WARN_ON(1);
3980                 break;
3981         }
3982
3983         if (!rdev_ops)
3984                 return -EOPNOTSUPP;
3985
3986         return rdev_ops(&rdev->wiphy, dev, &pmksa);
3987 }
3988
3989 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
3990 {
3991         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3992         struct net_device *dev = info->user_ptr[1];
3993
3994         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3995             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3996                 return -EOPNOTSUPP;
3997
3998         if (!rdev->ops->flush_pmksa)
3999                 return -EOPNOTSUPP;
4000
4001         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4002 }
4003
4004 static int nl80211_remain_on_channel(struct sk_buff *skb,
4005                                      struct genl_info *info)
4006 {
4007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4008         struct net_device *dev = info->user_ptr[1];
4009         struct ieee80211_channel *chan;
4010         struct sk_buff *msg;
4011         void *hdr;
4012         u64 cookie;
4013         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4014         u32 freq, duration;
4015         int err;
4016
4017         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4018             !info->attrs[NL80211_ATTR_DURATION])
4019                 return -EINVAL;
4020
4021         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4022
4023         /*
4024          * We should be on that channel for at least one jiffie,
4025          * and more than 5 seconds seems excessive.
4026          */
4027         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4028                 return -EINVAL;
4029
4030         if (!rdev->ops->remain_on_channel)
4031                 return -EOPNOTSUPP;
4032
4033         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4034                 channel_type = nla_get_u32(
4035                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4036                 if (channel_type != NL80211_CHAN_NO_HT &&
4037                     channel_type != NL80211_CHAN_HT20 &&
4038                     channel_type != NL80211_CHAN_HT40PLUS &&
4039                     channel_type != NL80211_CHAN_HT40MINUS)
4040                         return -EINVAL;
4041         }
4042
4043         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4044         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4045         if (chan == NULL)
4046                 return -EINVAL;
4047
4048         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4049         if (!msg)
4050                 return -ENOMEM;
4051
4052         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4053                              NL80211_CMD_REMAIN_ON_CHANNEL);
4054
4055         if (IS_ERR(hdr)) {
4056                 err = PTR_ERR(hdr);
4057                 goto free_msg;
4058         }
4059
4060         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4061                                            channel_type, duration, &cookie);
4062
4063         if (err)
4064                 goto free_msg;
4065
4066         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4067
4068         genlmsg_end(msg, hdr);
4069
4070         return genlmsg_reply(msg, info);
4071
4072  nla_put_failure:
4073         err = -ENOBUFS;
4074  free_msg:
4075         nlmsg_free(msg);
4076         return err;
4077 }
4078
4079 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4080                                             struct genl_info *info)
4081 {
4082         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4083         struct net_device *dev = info->user_ptr[1];
4084         u64 cookie;
4085
4086         if (!info->attrs[NL80211_ATTR_COOKIE])
4087                 return -EINVAL;
4088
4089         if (!rdev->ops->cancel_remain_on_channel)
4090                 return -EOPNOTSUPP;
4091
4092         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4093
4094         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4095 }
4096
4097 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4098                            u8 *rates, u8 rates_len)
4099 {
4100         u8 i;
4101         u32 mask = 0;
4102
4103         for (i = 0; i < rates_len; i++) {
4104                 int rate = (rates[i] & 0x7f) * 5;
4105                 int ridx;
4106                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4107                         struct ieee80211_rate *srate =
4108                                 &sband->bitrates[ridx];
4109                         if (rate == srate->bitrate) {
4110                                 mask |= 1 << ridx;
4111                                 break;
4112                         }
4113                 }
4114                 if (ridx == sband->n_bitrates)
4115                         return 0; /* rate not found */
4116         }
4117
4118         return mask;
4119 }
4120
4121 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4122         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4123                                     .len = NL80211_MAX_SUPP_RATES },
4124 };
4125
4126 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4127                                        struct genl_info *info)
4128 {
4129         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4130         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4131         struct cfg80211_bitrate_mask mask;
4132         int rem, i;
4133         struct net_device *dev = info->user_ptr[1];
4134         struct nlattr *tx_rates;
4135         struct ieee80211_supported_band *sband;
4136
4137         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4138                 return -EINVAL;
4139
4140         if (!rdev->ops->set_bitrate_mask)
4141                 return -EOPNOTSUPP;
4142
4143         memset(&mask, 0, sizeof(mask));
4144         /* Default to all rates enabled */
4145         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4146                 sband = rdev->wiphy.bands[i];
4147                 mask.control[i].legacy =
4148                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4149         }
4150
4151         /*
4152          * The nested attribute uses enum nl80211_band as the index. This maps
4153          * directly to the enum ieee80211_band values used in cfg80211.
4154          */
4155         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4156         {
4157                 enum ieee80211_band band = nla_type(tx_rates);
4158                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4159                         return -EINVAL;
4160                 sband = rdev->wiphy.bands[band];
4161                 if (sband == NULL)
4162                         return -EINVAL;
4163                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4164                           nla_len(tx_rates), nl80211_txattr_policy);
4165                 if (tb[NL80211_TXRATE_LEGACY]) {
4166                         mask.control[band].legacy = rateset_to_mask(
4167                                 sband,
4168                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4169                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4170                         if (mask.control[band].legacy == 0)
4171                                 return -EINVAL;
4172                 }
4173         }
4174
4175         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4176 }
4177
4178 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4179 {
4180         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4181         struct net_device *dev = info->user_ptr[1];
4182         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4183
4184         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4185                 return -EINVAL;
4186
4187         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4188                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4189
4190         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4191             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4192             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4193             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4194             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4195             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4196                 return -EOPNOTSUPP;
4197
4198         /* not much point in registering if we can't reply */
4199         if (!rdev->ops->mgmt_tx)
4200                 return -EOPNOTSUPP;
4201
4202         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4203                         frame_type,
4204                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4205                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4206 }
4207
4208 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4209 {
4210         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4211         struct net_device *dev = info->user_ptr[1];
4212         struct ieee80211_channel *chan;
4213         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4214         bool channel_type_valid = false;
4215         u32 freq;
4216         int err;
4217         void *hdr;
4218         u64 cookie;
4219         struct sk_buff *msg;
4220
4221         if (!info->attrs[NL80211_ATTR_FRAME] ||
4222             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4223                 return -EINVAL;
4224
4225         if (!rdev->ops->mgmt_tx)
4226                 return -EOPNOTSUPP;
4227
4228         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4229             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4230             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4231             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4232             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4233             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4234                 return -EOPNOTSUPP;
4235
4236         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4237                 channel_type = nla_get_u32(
4238                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4239                 if (channel_type != NL80211_CHAN_NO_HT &&
4240                     channel_type != NL80211_CHAN_HT20 &&
4241                     channel_type != NL80211_CHAN_HT40PLUS &&
4242                     channel_type != NL80211_CHAN_HT40MINUS)
4243                         return -EINVAL;
4244                 channel_type_valid = true;
4245         }
4246
4247         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4248         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4249         if (chan == NULL)
4250                 return -EINVAL;
4251
4252         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4253         if (!msg)
4254                 return -ENOMEM;
4255
4256         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4257                              NL80211_CMD_FRAME);
4258
4259         if (IS_ERR(hdr)) {
4260                 err = PTR_ERR(hdr);
4261                 goto free_msg;
4262         }
4263         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, channel_type,
4264                                     channel_type_valid,
4265                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4266                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4267                                     &cookie);
4268         if (err)
4269                 goto free_msg;
4270
4271         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4272
4273         genlmsg_end(msg, hdr);
4274         return genlmsg_reply(msg, info);
4275
4276  nla_put_failure:
4277         err = -ENOBUFS;
4278  free_msg:
4279         nlmsg_free(msg);
4280         return err;
4281 }
4282
4283 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4284 {
4285         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4286         struct wireless_dev *wdev;
4287         struct net_device *dev = info->user_ptr[1];
4288         u8 ps_state;
4289         bool state;
4290         int err;
4291
4292         if (!info->attrs[NL80211_ATTR_PS_STATE])
4293                 return -EINVAL;
4294
4295         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4296
4297         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4298                 return -EINVAL;
4299
4300         wdev = dev->ieee80211_ptr;
4301
4302         if (!rdev->ops->set_power_mgmt)
4303                 return -EOPNOTSUPP;
4304
4305         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4306
4307         if (state == wdev->ps)
4308                 return 0;
4309
4310         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4311                                         wdev->ps_timeout);
4312         if (!err)
4313                 wdev->ps = state;
4314         return err;
4315 }
4316
4317 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4318 {
4319         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4320         enum nl80211_ps_state ps_state;
4321         struct wireless_dev *wdev;
4322         struct net_device *dev = info->user_ptr[1];
4323         struct sk_buff *msg;
4324         void *hdr;
4325         int err;
4326
4327         wdev = dev->ieee80211_ptr;
4328
4329         if (!rdev->ops->set_power_mgmt)
4330                 return -EOPNOTSUPP;
4331
4332         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4333         if (!msg)
4334                 return -ENOMEM;
4335
4336         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4337                              NL80211_CMD_GET_POWER_SAVE);
4338         if (!hdr) {
4339                 err = -ENOBUFS;
4340                 goto free_msg;
4341         }
4342
4343         if (wdev->ps)
4344                 ps_state = NL80211_PS_ENABLED;
4345         else
4346                 ps_state = NL80211_PS_DISABLED;
4347
4348         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4349
4350         genlmsg_end(msg, hdr);
4351         return genlmsg_reply(msg, info);
4352
4353  nla_put_failure:
4354         err = -ENOBUFS;
4355  free_msg:
4356         nlmsg_free(msg);
4357         return err;
4358 }
4359
4360 static struct nla_policy
4361 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4362         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4363         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4364         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4365 };
4366
4367 static int nl80211_set_cqm_rssi(struct genl_info *info,
4368                                 s32 threshold, u32 hysteresis)
4369 {
4370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4371         struct wireless_dev *wdev;
4372         struct net_device *dev = info->user_ptr[1];
4373
4374         if (threshold > 0)
4375                 return -EINVAL;
4376
4377         wdev = dev->ieee80211_ptr;
4378
4379         if (!rdev->ops->set_cqm_rssi_config)
4380                 return -EOPNOTSUPP;
4381
4382         if (wdev->iftype != NL80211_IFTYPE_STATION &&
4383             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4384                 return -EOPNOTSUPP;
4385
4386         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4387                                               threshold, hysteresis);
4388 }
4389
4390 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4391 {
4392         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4393         struct nlattr *cqm;
4394         int err;
4395
4396         cqm = info->attrs[NL80211_ATTR_CQM];
4397         if (!cqm) {
4398                 err = -EINVAL;
4399                 goto out;
4400         }
4401
4402         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4403                                nl80211_attr_cqm_policy);
4404         if (err)
4405                 goto out;
4406
4407         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4408             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4409                 s32 threshold;
4410                 u32 hysteresis;
4411                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4412                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4413                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4414         } else
4415                 err = -EINVAL;
4416
4417 out:
4418         return err;
4419 }
4420
4421 #define NL80211_FLAG_NEED_WIPHY         0x01
4422 #define NL80211_FLAG_NEED_NETDEV        0x02
4423 #define NL80211_FLAG_NEED_RTNL          0x04
4424 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
4425 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
4426                                          NL80211_FLAG_CHECK_NETDEV_UP)
4427
4428 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4429                             struct genl_info *info)
4430 {
4431         struct cfg80211_registered_device *rdev;
4432         struct net_device *dev;
4433         int err;
4434         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4435
4436         if (rtnl)
4437                 rtnl_lock();
4438
4439         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4440                 rdev = cfg80211_get_dev_from_info(info);
4441                 if (IS_ERR(rdev)) {
4442                         if (rtnl)
4443                                 rtnl_unlock();
4444                         return PTR_ERR(rdev);
4445                 }
4446                 info->user_ptr[0] = rdev;
4447         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4448                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4449                 if (err) {
4450                         if (rtnl)
4451                                 rtnl_unlock();
4452                         return err;
4453                 }
4454                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4455                     !netif_running(dev)) {
4456                         cfg80211_unlock_rdev(rdev);
4457                         dev_put(dev);
4458                         if (rtnl)
4459                                 rtnl_unlock();
4460                         return -ENETDOWN;
4461                 }
4462                 info->user_ptr[0] = rdev;
4463                 info->user_ptr[1] = dev;
4464         }
4465
4466         return 0;
4467 }
4468
4469 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4470                               struct genl_info *info)
4471 {
4472         if (info->user_ptr[0])
4473                 cfg80211_unlock_rdev(info->user_ptr[0]);
4474         if (info->user_ptr[1])
4475                 dev_put(info->user_ptr[1]);
4476         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4477                 rtnl_unlock();
4478 }
4479
4480 static struct genl_ops nl80211_ops[] = {
4481         {
4482                 .cmd = NL80211_CMD_GET_WIPHY,
4483                 .doit = nl80211_get_wiphy,
4484                 .dumpit = nl80211_dump_wiphy,
4485                 .policy = nl80211_policy,
4486                 /* can be retrieved by unprivileged users */
4487                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4488         },
4489         {
4490                 .cmd = NL80211_CMD_SET_WIPHY,
4491                 .doit = nl80211_set_wiphy,
4492                 .policy = nl80211_policy,
4493                 .flags = GENL_ADMIN_PERM,
4494                 .internal_flags = NL80211_FLAG_NEED_RTNL,
4495         },
4496         {
4497                 .cmd = NL80211_CMD_GET_INTERFACE,
4498                 .doit = nl80211_get_interface,
4499                 .dumpit = nl80211_dump_interface,
4500                 .policy = nl80211_policy,
4501                 /* can be retrieved by unprivileged users */
4502                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4503         },
4504         {
4505                 .cmd = NL80211_CMD_SET_INTERFACE,
4506                 .doit = nl80211_set_interface,
4507                 .policy = nl80211_policy,
4508                 .flags = GENL_ADMIN_PERM,
4509                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4510                                   NL80211_FLAG_NEED_RTNL,
4511         },
4512         {
4513                 .cmd = NL80211_CMD_NEW_INTERFACE,
4514                 .doit = nl80211_new_interface,
4515                 .policy = nl80211_policy,
4516                 .flags = GENL_ADMIN_PERM,
4517                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4518                                   NL80211_FLAG_NEED_RTNL,
4519         },
4520         {
4521                 .cmd = NL80211_CMD_DEL_INTERFACE,
4522                 .doit = nl80211_del_interface,
4523                 .policy = nl80211_policy,
4524                 .flags = GENL_ADMIN_PERM,
4525                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4526                                   NL80211_FLAG_NEED_RTNL,
4527         },
4528         {
4529                 .cmd = NL80211_CMD_GET_KEY,
4530                 .doit = nl80211_get_key,
4531                 .policy = nl80211_policy,
4532                 .flags = GENL_ADMIN_PERM,
4533                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4534                                   NL80211_FLAG_NEED_RTNL,
4535         },
4536         {
4537                 .cmd = NL80211_CMD_SET_KEY,
4538                 .doit = nl80211_set_key,
4539                 .policy = nl80211_policy,
4540                 .flags = GENL_ADMIN_PERM,
4541                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4542                                   NL80211_FLAG_NEED_RTNL,
4543         },
4544         {
4545                 .cmd = NL80211_CMD_NEW_KEY,
4546                 .doit = nl80211_new_key,
4547                 .policy = nl80211_policy,
4548                 .flags = GENL_ADMIN_PERM,
4549                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4550                                   NL80211_FLAG_NEED_RTNL,
4551         },
4552         {
4553                 .cmd = NL80211_CMD_DEL_KEY,
4554                 .doit = nl80211_del_key,
4555                 .policy = nl80211_policy,
4556                 .flags = GENL_ADMIN_PERM,
4557                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4558                                   NL80211_FLAG_NEED_RTNL,
4559         },
4560         {
4561                 .cmd = NL80211_CMD_SET_BEACON,
4562                 .policy = nl80211_policy,
4563                 .flags = GENL_ADMIN_PERM,
4564                 .doit = nl80211_addset_beacon,
4565                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4566                                   NL80211_FLAG_NEED_RTNL,
4567         },
4568         {
4569                 .cmd = NL80211_CMD_NEW_BEACON,
4570                 .policy = nl80211_policy,
4571                 .flags = GENL_ADMIN_PERM,
4572                 .doit = nl80211_addset_beacon,
4573                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4574                                   NL80211_FLAG_NEED_RTNL,
4575         },
4576         {
4577                 .cmd = NL80211_CMD_DEL_BEACON,
4578                 .policy = nl80211_policy,
4579                 .flags = GENL_ADMIN_PERM,
4580                 .doit = nl80211_del_beacon,
4581                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4582                                   NL80211_FLAG_NEED_RTNL,
4583         },
4584         {
4585                 .cmd = NL80211_CMD_GET_STATION,
4586                 .doit = nl80211_get_station,
4587                 .dumpit = nl80211_dump_station,
4588                 .policy = nl80211_policy,
4589                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4590                                   NL80211_FLAG_NEED_RTNL,
4591         },
4592         {
4593                 .cmd = NL80211_CMD_SET_STATION,
4594                 .doit = nl80211_set_station,
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_NEW_STATION,
4602                 .doit = nl80211_new_station,
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_DEL_STATION,
4610                 .doit = nl80211_del_station,
4611                 .policy = nl80211_policy,
4612                 .flags = GENL_ADMIN_PERM,
4613                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4614                                   NL80211_FLAG_NEED_RTNL,
4615         },
4616         {
4617                 .cmd = NL80211_CMD_GET_MPATH,
4618                 .doit = nl80211_get_mpath,
4619                 .dumpit = nl80211_dump_mpath,
4620                 .policy = nl80211_policy,
4621                 .flags = GENL_ADMIN_PERM,
4622                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4623                                   NL80211_FLAG_NEED_RTNL,
4624         },
4625         {
4626                 .cmd = NL80211_CMD_SET_MPATH,
4627                 .doit = nl80211_set_mpath,
4628                 .policy = nl80211_policy,
4629                 .flags = GENL_ADMIN_PERM,
4630                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4631                                   NL80211_FLAG_NEED_RTNL,
4632         },
4633         {
4634                 .cmd = NL80211_CMD_NEW_MPATH,
4635                 .doit = nl80211_new_mpath,
4636                 .policy = nl80211_policy,
4637                 .flags = GENL_ADMIN_PERM,
4638                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4639                                   NL80211_FLAG_NEED_RTNL,
4640         },
4641         {
4642                 .cmd = NL80211_CMD_DEL_MPATH,
4643                 .doit = nl80211_del_mpath,
4644                 .policy = nl80211_policy,
4645                 .flags = GENL_ADMIN_PERM,
4646                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4647                                   NL80211_FLAG_NEED_RTNL,
4648         },
4649         {
4650                 .cmd = NL80211_CMD_SET_BSS,
4651                 .doit = nl80211_set_bss,
4652                 .policy = nl80211_policy,
4653                 .flags = GENL_ADMIN_PERM,
4654                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4655                                   NL80211_FLAG_NEED_RTNL,
4656         },
4657         {
4658                 .cmd = NL80211_CMD_GET_REG,
4659                 .doit = nl80211_get_reg,
4660                 .policy = nl80211_policy,
4661                 /* can be retrieved by unprivileged users */
4662         },
4663         {
4664                 .cmd = NL80211_CMD_SET_REG,
4665                 .doit = nl80211_set_reg,
4666                 .policy = nl80211_policy,
4667                 .flags = GENL_ADMIN_PERM,
4668         },
4669         {
4670                 .cmd = NL80211_CMD_REQ_SET_REG,
4671                 .doit = nl80211_req_set_reg,
4672                 .policy = nl80211_policy,
4673                 .flags = GENL_ADMIN_PERM,
4674         },
4675         {
4676                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4677                 .doit = nl80211_get_mesh_params,
4678                 .policy = nl80211_policy,
4679                 /* can be retrieved by unprivileged users */
4680                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4681                                   NL80211_FLAG_NEED_RTNL,
4682         },
4683         {
4684                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4685                 .doit = nl80211_set_mesh_params,
4686                 .policy = nl80211_policy,
4687                 .flags = GENL_ADMIN_PERM,
4688                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4689                                   NL80211_FLAG_NEED_RTNL,
4690         },
4691         {
4692                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4693                 .doit = nl80211_trigger_scan,
4694                 .policy = nl80211_policy,
4695                 .flags = GENL_ADMIN_PERM,
4696                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4697                                   NL80211_FLAG_NEED_RTNL,
4698         },
4699         {
4700                 .cmd = NL80211_CMD_GET_SCAN,
4701                 .policy = nl80211_policy,
4702                 .dumpit = nl80211_dump_scan,
4703         },
4704         {
4705                 .cmd = NL80211_CMD_AUTHENTICATE,
4706                 .doit = nl80211_authenticate,
4707                 .policy = nl80211_policy,
4708                 .flags = GENL_ADMIN_PERM,
4709                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4710                                   NL80211_FLAG_NEED_RTNL,
4711         },
4712         {
4713                 .cmd = NL80211_CMD_ASSOCIATE,
4714                 .doit = nl80211_associate,
4715                 .policy = nl80211_policy,
4716                 .flags = GENL_ADMIN_PERM,
4717                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4718                                   NL80211_FLAG_NEED_RTNL,
4719         },
4720         {
4721                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4722                 .doit = nl80211_deauthenticate,
4723                 .policy = nl80211_policy,
4724                 .flags = GENL_ADMIN_PERM,
4725                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4726                                   NL80211_FLAG_NEED_RTNL,
4727         },
4728         {
4729                 .cmd = NL80211_CMD_DISASSOCIATE,
4730                 .doit = nl80211_disassociate,
4731                 .policy = nl80211_policy,
4732                 .flags = GENL_ADMIN_PERM,
4733                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4734                                   NL80211_FLAG_NEED_RTNL,
4735         },
4736         {
4737                 .cmd = NL80211_CMD_JOIN_IBSS,
4738                 .doit = nl80211_join_ibss,
4739                 .policy = nl80211_policy,
4740                 .flags = GENL_ADMIN_PERM,
4741                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4742                                   NL80211_FLAG_NEED_RTNL,
4743         },
4744         {
4745                 .cmd = NL80211_CMD_LEAVE_IBSS,
4746                 .doit = nl80211_leave_ibss,
4747                 .policy = nl80211_policy,
4748                 .flags = GENL_ADMIN_PERM,
4749                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4750                                   NL80211_FLAG_NEED_RTNL,
4751         },
4752 #ifdef CONFIG_NL80211_TESTMODE
4753         {
4754                 .cmd = NL80211_CMD_TESTMODE,
4755                 .doit = nl80211_testmode_do,
4756                 .policy = nl80211_policy,
4757                 .flags = GENL_ADMIN_PERM,
4758                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4759                                   NL80211_FLAG_NEED_RTNL,
4760         },
4761 #endif
4762         {
4763                 .cmd = NL80211_CMD_CONNECT,
4764                 .doit = nl80211_connect,
4765                 .policy = nl80211_policy,
4766                 .flags = GENL_ADMIN_PERM,
4767                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4768                                   NL80211_FLAG_NEED_RTNL,
4769         },
4770         {
4771                 .cmd = NL80211_CMD_DISCONNECT,
4772                 .doit = nl80211_disconnect,
4773                 .policy = nl80211_policy,
4774                 .flags = GENL_ADMIN_PERM,
4775                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4776                                   NL80211_FLAG_NEED_RTNL,
4777         },
4778         {
4779                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4780                 .doit = nl80211_wiphy_netns,
4781                 .policy = nl80211_policy,
4782                 .flags = GENL_ADMIN_PERM,
4783                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4784                                   NL80211_FLAG_NEED_RTNL,
4785         },
4786         {
4787                 .cmd = NL80211_CMD_GET_SURVEY,
4788                 .policy = nl80211_policy,
4789                 .dumpit = nl80211_dump_survey,
4790         },
4791         {
4792                 .cmd = NL80211_CMD_SET_PMKSA,
4793                 .doit = nl80211_setdel_pmksa,
4794                 .policy = nl80211_policy,
4795                 .flags = GENL_ADMIN_PERM,
4796                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4797                                   NL80211_FLAG_NEED_RTNL,
4798         },
4799         {
4800                 .cmd = NL80211_CMD_DEL_PMKSA,
4801                 .doit = nl80211_setdel_pmksa,
4802                 .policy = nl80211_policy,
4803                 .flags = GENL_ADMIN_PERM,
4804                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4805                                   NL80211_FLAG_NEED_RTNL,
4806         },
4807         {
4808                 .cmd = NL80211_CMD_FLUSH_PMKSA,
4809                 .doit = nl80211_flush_pmksa,
4810                 .policy = nl80211_policy,
4811                 .flags = GENL_ADMIN_PERM,
4812                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4813                                   NL80211_FLAG_NEED_RTNL,
4814         },
4815         {
4816                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
4817                 .doit = nl80211_remain_on_channel,
4818                 .policy = nl80211_policy,
4819                 .flags = GENL_ADMIN_PERM,
4820                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4821                                   NL80211_FLAG_NEED_RTNL,
4822         },
4823         {
4824                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
4825                 .doit = nl80211_cancel_remain_on_channel,
4826                 .policy = nl80211_policy,
4827                 .flags = GENL_ADMIN_PERM,
4828                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4829                                   NL80211_FLAG_NEED_RTNL,
4830         },
4831         {
4832                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
4833                 .doit = nl80211_set_tx_bitrate_mask,
4834                 .policy = nl80211_policy,
4835                 .flags = GENL_ADMIN_PERM,
4836                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4837                                   NL80211_FLAG_NEED_RTNL,
4838         },
4839         {
4840                 .cmd = NL80211_CMD_REGISTER_FRAME,
4841                 .doit = nl80211_register_mgmt,
4842                 .policy = nl80211_policy,
4843                 .flags = GENL_ADMIN_PERM,
4844                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4845                                   NL80211_FLAG_NEED_RTNL,
4846         },
4847         {
4848                 .cmd = NL80211_CMD_FRAME,
4849                 .doit = nl80211_tx_mgmt,
4850                 .policy = nl80211_policy,
4851                 .flags = GENL_ADMIN_PERM,
4852                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4853                                   NL80211_FLAG_NEED_RTNL,
4854         },
4855         {
4856                 .cmd = NL80211_CMD_SET_POWER_SAVE,
4857                 .doit = nl80211_set_power_save,
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_GET_POWER_SAVE,
4865                 .doit = nl80211_get_power_save,
4866                 .policy = nl80211_policy,
4867                 /* can be retrieved by unprivileged users */
4868                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4869                                   NL80211_FLAG_NEED_RTNL,
4870         },
4871         {
4872                 .cmd = NL80211_CMD_SET_CQM,
4873                 .doit = nl80211_set_cqm,
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_SET_CHANNEL,
4881                 .doit = nl80211_set_channel,
4882                 .policy = nl80211_policy,
4883                 .flags = GENL_ADMIN_PERM,
4884                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4885                                   NL80211_FLAG_NEED_RTNL,
4886         },
4887         {
4888                 .cmd = NL80211_CMD_SET_WDS_PEER,
4889                 .doit = nl80211_set_wds_peer,
4890                 .policy = nl80211_policy,
4891                 .flags = GENL_ADMIN_PERM,
4892                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4893                                   NL80211_FLAG_NEED_RTNL,
4894         },
4895 };
4896
4897 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4898         .name = "mlme",
4899 };
4900
4901 /* multicast groups */
4902 static struct genl_multicast_group nl80211_config_mcgrp = {
4903         .name = "config",
4904 };
4905 static struct genl_multicast_group nl80211_scan_mcgrp = {
4906         .name = "scan",
4907 };
4908 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4909         .name = "regulatory",
4910 };
4911
4912 /* notification functions */
4913
4914 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4915 {
4916         struct sk_buff *msg;
4917
4918         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4919         if (!msg)
4920                 return;
4921
4922         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4923                 nlmsg_free(msg);
4924                 return;
4925         }
4926
4927         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4928                                 nl80211_config_mcgrp.id, GFP_KERNEL);
4929 }
4930
4931 static int nl80211_add_scan_req(struct sk_buff *msg,
4932                                 struct cfg80211_registered_device *rdev)
4933 {
4934         struct cfg80211_scan_request *req = rdev->scan_req;
4935         struct nlattr *nest;
4936         int i;
4937
4938         ASSERT_RDEV_LOCK(rdev);
4939
4940         if (WARN_ON(!req))
4941                 return 0;
4942
4943         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4944         if (!nest)
4945                 goto nla_put_failure;
4946         for (i = 0; i < req->n_ssids; i++)
4947                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4948         nla_nest_end(msg, nest);
4949
4950         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4951         if (!nest)
4952                 goto nla_put_failure;
4953         for (i = 0; i < req->n_channels; i++)
4954                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4955         nla_nest_end(msg, nest);
4956
4957         if (req->ie)
4958                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4959
4960         return 0;
4961  nla_put_failure:
4962         return -ENOBUFS;
4963 }
4964
4965 static int nl80211_send_scan_msg(struct sk_buff *msg,
4966                                  struct cfg80211_registered_device *rdev,
4967                                  struct net_device *netdev,
4968                                  u32 pid, u32 seq, int flags,
4969                                  u32 cmd)
4970 {
4971         void *hdr;
4972
4973         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4974         if (!hdr)
4975                 return -1;
4976
4977         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4978         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4979
4980         /* ignore errors and send incomplete event anyway */
4981         nl80211_add_scan_req(msg, rdev);
4982
4983         return genlmsg_end(msg, hdr);
4984
4985  nla_put_failure:
4986         genlmsg_cancel(msg, hdr);
4987         return -EMSGSIZE;
4988 }
4989
4990 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4991                              struct net_device *netdev)
4992 {
4993         struct sk_buff *msg;
4994
4995         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4996         if (!msg)
4997                 return;
4998
4999         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5000                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5001                 nlmsg_free(msg);
5002                 return;
5003         }
5004
5005         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5006                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5007 }
5008
5009 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5010                             struct net_device *netdev)
5011 {
5012         struct sk_buff *msg;
5013
5014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5015         if (!msg)
5016                 return;
5017
5018         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5019                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5020                 nlmsg_free(msg);
5021                 return;
5022         }
5023
5024         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5025                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5026 }
5027
5028 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5029                                struct net_device *netdev)
5030 {
5031         struct sk_buff *msg;
5032
5033         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5034         if (!msg)
5035                 return;
5036
5037         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5038                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5039                 nlmsg_free(msg);
5040                 return;
5041         }
5042
5043         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5044                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5045 }
5046
5047 /*
5048  * This can happen on global regulatory changes or device specific settings
5049  * based on custom world regulatory domains.
5050  */
5051 void nl80211_send_reg_change_event(struct regulatory_request *request)
5052 {
5053         struct sk_buff *msg;
5054         void *hdr;
5055
5056         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5057         if (!msg)
5058                 return;
5059
5060         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5061         if (!hdr) {
5062                 nlmsg_free(msg);
5063                 return;
5064         }
5065
5066         /* Userspace can always count this one always being set */
5067         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5068
5069         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5070                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5071                            NL80211_REGDOM_TYPE_WORLD);
5072         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5073                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5074                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5075         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5076                  request->intersect)
5077                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5078                            NL80211_REGDOM_TYPE_INTERSECTION);
5079         else {
5080                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5081                            NL80211_REGDOM_TYPE_COUNTRY);
5082                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5083         }
5084
5085         if (wiphy_idx_valid(request->wiphy_idx))
5086                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5087
5088         if (genlmsg_end(msg, hdr) < 0) {
5089                 nlmsg_free(msg);
5090                 return;
5091         }
5092
5093         rcu_read_lock();
5094         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5095                                 GFP_ATOMIC);
5096         rcu_read_unlock();
5097
5098         return;
5099
5100 nla_put_failure:
5101         genlmsg_cancel(msg, hdr);
5102         nlmsg_free(msg);
5103 }
5104
5105 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5106                                     struct net_device *netdev,
5107                                     const u8 *buf, size_t len,
5108                                     enum nl80211_commands cmd, gfp_t gfp)
5109 {
5110         struct sk_buff *msg;
5111         void *hdr;
5112
5113         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5114         if (!msg)
5115                 return;
5116
5117         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5118         if (!hdr) {
5119                 nlmsg_free(msg);
5120                 return;
5121         }
5122
5123         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5124         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5125         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5126
5127         if (genlmsg_end(msg, hdr) < 0) {
5128                 nlmsg_free(msg);
5129                 return;
5130         }
5131
5132         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5133                                 nl80211_mlme_mcgrp.id, gfp);
5134         return;
5135
5136  nla_put_failure:
5137         genlmsg_cancel(msg, hdr);
5138         nlmsg_free(msg);
5139 }
5140
5141 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5142                           struct net_device *netdev, const u8 *buf,
5143                           size_t len, gfp_t gfp)
5144 {
5145         nl80211_send_mlme_event(rdev, netdev, buf, len,
5146                                 NL80211_CMD_AUTHENTICATE, gfp);
5147 }
5148
5149 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5150                            struct net_device *netdev, const u8 *buf,
5151                            size_t len, gfp_t gfp)
5152 {
5153         nl80211_send_mlme_event(rdev, netdev, buf, len,
5154                                 NL80211_CMD_ASSOCIATE, gfp);
5155 }
5156
5157 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5158                          struct net_device *netdev, const u8 *buf,
5159                          size_t len, gfp_t gfp)
5160 {
5161         nl80211_send_mlme_event(rdev, netdev, buf, len,
5162                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5163 }
5164
5165 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5166                            struct net_device *netdev, const u8 *buf,
5167                            size_t len, gfp_t gfp)
5168 {
5169         nl80211_send_mlme_event(rdev, netdev, buf, len,
5170                                 NL80211_CMD_DISASSOCIATE, gfp);
5171 }
5172
5173 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5174                                       struct net_device *netdev, int cmd,
5175                                       const u8 *addr, gfp_t gfp)
5176 {
5177         struct sk_buff *msg;
5178         void *hdr;
5179
5180         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5181         if (!msg)
5182                 return;
5183
5184         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5185         if (!hdr) {
5186                 nlmsg_free(msg);
5187                 return;
5188         }
5189
5190         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5191         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5192         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5193         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5194
5195         if (genlmsg_end(msg, hdr) < 0) {
5196                 nlmsg_free(msg);
5197                 return;
5198         }
5199
5200         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5201                                 nl80211_mlme_mcgrp.id, gfp);
5202         return;
5203
5204  nla_put_failure:
5205         genlmsg_cancel(msg, hdr);
5206         nlmsg_free(msg);
5207 }
5208
5209 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5210                                struct net_device *netdev, const u8 *addr,
5211                                gfp_t gfp)
5212 {
5213         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5214                                   addr, gfp);
5215 }
5216
5217 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5218                                 struct net_device *netdev, const u8 *addr,
5219                                 gfp_t gfp)
5220 {
5221         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5222                                   addr, gfp);
5223 }
5224
5225 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5226                                  struct net_device *netdev, const u8 *bssid,
5227                                  const u8 *req_ie, size_t req_ie_len,
5228                                  const u8 *resp_ie, size_t resp_ie_len,
5229                                  u16 status, gfp_t gfp)
5230 {
5231         struct sk_buff *msg;
5232         void *hdr;
5233
5234         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5235         if (!msg)
5236                 return;
5237
5238         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5239         if (!hdr) {
5240                 nlmsg_free(msg);
5241                 return;
5242         }
5243
5244         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5245         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5246         if (bssid)
5247                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5248         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5249         if (req_ie)
5250                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5251         if (resp_ie)
5252                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5253
5254         if (genlmsg_end(msg, hdr) < 0) {
5255                 nlmsg_free(msg);
5256                 return;
5257         }
5258
5259         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5260                                 nl80211_mlme_mcgrp.id, gfp);
5261         return;
5262
5263  nla_put_failure:
5264         genlmsg_cancel(msg, hdr);
5265         nlmsg_free(msg);
5266
5267 }
5268
5269 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5270                          struct net_device *netdev, const u8 *bssid,
5271                          const u8 *req_ie, size_t req_ie_len,
5272                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5273 {
5274         struct sk_buff *msg;
5275         void *hdr;
5276
5277         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5278         if (!msg)
5279                 return;
5280
5281         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5282         if (!hdr) {
5283                 nlmsg_free(msg);
5284                 return;
5285         }
5286
5287         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5288         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5289         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5290         if (req_ie)
5291                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5292         if (resp_ie)
5293                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5294
5295         if (genlmsg_end(msg, hdr) < 0) {
5296                 nlmsg_free(msg);
5297                 return;
5298         }
5299
5300         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5301                                 nl80211_mlme_mcgrp.id, gfp);
5302         return;
5303
5304  nla_put_failure:
5305         genlmsg_cancel(msg, hdr);
5306         nlmsg_free(msg);
5307
5308 }
5309
5310 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5311                                struct net_device *netdev, u16 reason,
5312                                const u8 *ie, size_t ie_len, bool from_ap)
5313 {
5314         struct sk_buff *msg;
5315         void *hdr;
5316
5317         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5318         if (!msg)
5319                 return;
5320
5321         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5322         if (!hdr) {
5323                 nlmsg_free(msg);
5324                 return;
5325         }
5326
5327         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5328         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5329         if (from_ap && reason)
5330                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5331         if (from_ap)
5332                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5333         if (ie)
5334                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5335
5336         if (genlmsg_end(msg, hdr) < 0) {
5337                 nlmsg_free(msg);
5338                 return;
5339         }
5340
5341         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5342                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5343         return;
5344
5345  nla_put_failure:
5346         genlmsg_cancel(msg, hdr);
5347         nlmsg_free(msg);
5348
5349 }
5350
5351 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5352                              struct net_device *netdev, const u8 *bssid,
5353                              gfp_t gfp)
5354 {
5355         struct sk_buff *msg;
5356         void *hdr;
5357
5358         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5359         if (!msg)
5360                 return;
5361
5362         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5363         if (!hdr) {
5364                 nlmsg_free(msg);
5365                 return;
5366         }
5367
5368         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5369         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5370         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5371
5372         if (genlmsg_end(msg, hdr) < 0) {
5373                 nlmsg_free(msg);
5374                 return;
5375         }
5376
5377         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5378                                 nl80211_mlme_mcgrp.id, gfp);
5379         return;
5380
5381  nla_put_failure:
5382         genlmsg_cancel(msg, hdr);
5383         nlmsg_free(msg);
5384 }
5385
5386 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5387                                  struct net_device *netdev, const u8 *addr,
5388                                  enum nl80211_key_type key_type, int key_id,
5389                                  const u8 *tsc, gfp_t gfp)
5390 {
5391         struct sk_buff *msg;
5392         void *hdr;
5393
5394         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5395         if (!msg)
5396                 return;
5397
5398         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5399         if (!hdr) {
5400                 nlmsg_free(msg);
5401                 return;
5402         }
5403
5404         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5405         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5406         if (addr)
5407                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5408         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5409         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5410         if (tsc)
5411                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5412
5413         if (genlmsg_end(msg, hdr) < 0) {
5414                 nlmsg_free(msg);
5415                 return;
5416         }
5417
5418         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5419                                 nl80211_mlme_mcgrp.id, gfp);
5420         return;
5421
5422  nla_put_failure:
5423         genlmsg_cancel(msg, hdr);
5424         nlmsg_free(msg);
5425 }
5426
5427 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5428                                     struct ieee80211_channel *channel_before,
5429                                     struct ieee80211_channel *channel_after)
5430 {
5431         struct sk_buff *msg;
5432         void *hdr;
5433         struct nlattr *nl_freq;
5434
5435         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5436         if (!msg)
5437                 return;
5438
5439         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5440         if (!hdr) {
5441                 nlmsg_free(msg);
5442                 return;
5443         }
5444
5445         /*
5446          * Since we are applying the beacon hint to a wiphy we know its
5447          * wiphy_idx is valid
5448          */
5449         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5450
5451         /* Before */
5452         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5453         if (!nl_freq)
5454                 goto nla_put_failure;
5455         if (nl80211_msg_put_channel(msg, channel_before))
5456                 goto nla_put_failure;
5457         nla_nest_end(msg, nl_freq);
5458
5459         /* After */
5460         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5461         if (!nl_freq)
5462                 goto nla_put_failure;
5463         if (nl80211_msg_put_channel(msg, channel_after))
5464                 goto nla_put_failure;
5465         nla_nest_end(msg, nl_freq);
5466
5467         if (genlmsg_end(msg, hdr) < 0) {
5468                 nlmsg_free(msg);
5469                 return;
5470         }
5471
5472         rcu_read_lock();
5473         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5474                                 GFP_ATOMIC);
5475         rcu_read_unlock();
5476
5477         return;
5478
5479 nla_put_failure:
5480         genlmsg_cancel(msg, hdr);
5481         nlmsg_free(msg);
5482 }
5483
5484 static void nl80211_send_remain_on_chan_event(
5485         int cmd, struct cfg80211_registered_device *rdev,
5486         struct net_device *netdev, u64 cookie,
5487         struct ieee80211_channel *chan,
5488         enum nl80211_channel_type channel_type,
5489         unsigned int duration, gfp_t gfp)
5490 {
5491         struct sk_buff *msg;
5492         void *hdr;
5493
5494         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5495         if (!msg)
5496                 return;
5497
5498         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5499         if (!hdr) {
5500                 nlmsg_free(msg);
5501                 return;
5502         }
5503
5504         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5505         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5506         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5507         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5508         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5509
5510         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5511                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5512
5513         if (genlmsg_end(msg, hdr) < 0) {
5514                 nlmsg_free(msg);
5515                 return;
5516         }
5517
5518         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5519                                 nl80211_mlme_mcgrp.id, gfp);
5520         return;
5521
5522  nla_put_failure:
5523         genlmsg_cancel(msg, hdr);
5524         nlmsg_free(msg);
5525 }
5526
5527 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5528                                     struct net_device *netdev, u64 cookie,
5529                                     struct ieee80211_channel *chan,
5530                                     enum nl80211_channel_type channel_type,
5531                                     unsigned int duration, gfp_t gfp)
5532 {
5533         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5534                                           rdev, netdev, cookie, chan,
5535                                           channel_type, duration, gfp);
5536 }
5537
5538 void nl80211_send_remain_on_channel_cancel(
5539         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5540         u64 cookie, struct ieee80211_channel *chan,
5541         enum nl80211_channel_type channel_type, gfp_t gfp)
5542 {
5543         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5544                                           rdev, netdev, cookie, chan,
5545                                           channel_type, 0, gfp);
5546 }
5547
5548 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5549                             struct net_device *dev, const u8 *mac_addr,
5550                             struct station_info *sinfo, gfp_t gfp)
5551 {
5552         struct sk_buff *msg;
5553
5554         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5555         if (!msg)
5556                 return;
5557
5558         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5559                 nlmsg_free(msg);
5560                 return;
5561         }
5562
5563         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5564                                 nl80211_mlme_mcgrp.id, gfp);
5565 }
5566
5567 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5568                       struct net_device *netdev, u32 nlpid,
5569                       int freq, const u8 *buf, size_t len, gfp_t gfp)
5570 {
5571         struct sk_buff *msg;
5572         void *hdr;
5573         int err;
5574
5575         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5576         if (!msg)
5577                 return -ENOMEM;
5578
5579         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5580         if (!hdr) {
5581                 nlmsg_free(msg);
5582                 return -ENOMEM;
5583         }
5584
5585         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5586         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5587         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5588         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5589
5590         err = genlmsg_end(msg, hdr);
5591         if (err < 0) {
5592                 nlmsg_free(msg);
5593                 return err;
5594         }
5595
5596         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5597         if (err < 0)
5598                 return err;
5599         return 0;
5600
5601  nla_put_failure:
5602         genlmsg_cancel(msg, hdr);
5603         nlmsg_free(msg);
5604         return -ENOBUFS;
5605 }
5606
5607 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
5608                                  struct net_device *netdev, u64 cookie,
5609                                  const u8 *buf, size_t len, bool ack,
5610                                  gfp_t gfp)
5611 {
5612         struct sk_buff *msg;
5613         void *hdr;
5614
5615         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5616         if (!msg)
5617                 return;
5618
5619         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
5620         if (!hdr) {
5621                 nlmsg_free(msg);
5622                 return;
5623         }
5624
5625         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5626         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5627         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5628         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5629         if (ack)
5630                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5631
5632         if (genlmsg_end(msg, hdr) < 0) {
5633                 nlmsg_free(msg);
5634                 return;
5635         }
5636
5637         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5638         return;
5639
5640  nla_put_failure:
5641         genlmsg_cancel(msg, hdr);
5642         nlmsg_free(msg);
5643 }
5644
5645 void
5646 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
5647                              struct net_device *netdev,
5648                              enum nl80211_cqm_rssi_threshold_event rssi_event,
5649                              gfp_t gfp)
5650 {
5651         struct sk_buff *msg;
5652         struct nlattr *pinfoattr;
5653         void *hdr;
5654
5655         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5656         if (!msg)
5657                 return;
5658
5659         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
5660         if (!hdr) {
5661                 nlmsg_free(msg);
5662                 return;
5663         }
5664
5665         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5666         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5667
5668         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
5669         if (!pinfoattr)
5670                 goto nla_put_failure;
5671
5672         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
5673                     rssi_event);
5674
5675         nla_nest_end(msg, pinfoattr);
5676
5677         if (genlmsg_end(msg, hdr) < 0) {
5678                 nlmsg_free(msg);
5679                 return;
5680         }
5681
5682         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5683                                 nl80211_mlme_mcgrp.id, gfp);
5684         return;
5685
5686  nla_put_failure:
5687         genlmsg_cancel(msg, hdr);
5688         nlmsg_free(msg);
5689 }
5690
5691 static int nl80211_netlink_notify(struct notifier_block * nb,
5692                                   unsigned long state,
5693                                   void *_notify)
5694 {
5695         struct netlink_notify *notify = _notify;
5696         struct cfg80211_registered_device *rdev;
5697         struct wireless_dev *wdev;
5698
5699         if (state != NETLINK_URELEASE)
5700                 return NOTIFY_DONE;
5701
5702         rcu_read_lock();
5703
5704         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
5705                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
5706                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
5707
5708         rcu_read_unlock();
5709
5710         return NOTIFY_DONE;
5711 }
5712
5713 static struct notifier_block nl80211_netlink_notifier = {
5714         .notifier_call = nl80211_netlink_notify,
5715 };
5716
5717 /* initialisation/exit functions */
5718
5719 int nl80211_init(void)
5720 {
5721         int err;
5722
5723         err = genl_register_family_with_ops(&nl80211_fam,
5724                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5725         if (err)
5726                 return err;
5727
5728         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5729         if (err)
5730                 goto err_out;
5731
5732         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5733         if (err)
5734                 goto err_out;
5735
5736         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5737         if (err)
5738                 goto err_out;
5739
5740         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5741         if (err)
5742                 goto err_out;
5743
5744 #ifdef CONFIG_NL80211_TESTMODE
5745         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5746         if (err)
5747                 goto err_out;
5748 #endif
5749
5750         err = netlink_register_notifier(&nl80211_netlink_notifier);
5751         if (err)
5752                 goto err_out;
5753
5754         return 0;
5755  err_out:
5756         genl_unregister_family(&nl80211_fam);
5757         return err;
5758 }
5759
5760 void nl80211_exit(void)
5761 {
5762         netlink_unregister_notifier(&nl80211_netlink_notifier);
5763         genl_unregister_family(&nl80211_fam);
5764 }