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         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 125
 126         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 127         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 128
 129         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 130                                          .len = NL80211_HT_CAPABILITY_LEN },
 131
 132         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 133         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 134                               .len = IEEE80211_MAX_DATA_LEN },
 135         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 136         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 137
 138         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 139                                 .len = IEEE80211_MAX_SSID_LEN },
 140         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 141         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 142         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 143         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 144         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 145         [NL80211_ATTR_STA_FLAGS2] = {
 146                 .len = sizeof(struct nl80211_sta_flag_update),
 147         },
 148         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 149         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 150         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 151         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 152         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 153         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 154         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 155         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 156         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 157                                  .len = WLAN_PMKID_LEN },
 158         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 159         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 160         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 161         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 162                                  .len = IEEE80211_MAX_DATA_LEN },
 163         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 164         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 165         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 166         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 167         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 168         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 170         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 171         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 172         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 173         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 174         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 175         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 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         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 188 };
 189
 190 /* policy for the key default flags */
 191 static const struct nla_policy
 192 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 193         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 194         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 195 };
 196
 197 /* ifidx get helper */
 198 static int nl80211_get_ifidx(struct netlink_callback *cb)
 199 {
 200         int res;
 201
 202         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 203                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 204                           nl80211_policy);
 205         if (res)
 206                 return res;
 207
 208         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 209                 return -EINVAL;
 210
 211         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 212         if (!res)
 213                 return -EINVAL;
 214         return res;
 215 }
 216
 217 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 218                                        struct netlink_callback *cb,
 219                                        struct cfg80211_registered_device **rdev,
 220                                        struct net_device **dev)
 221 {
 222         int ifidx = cb->args[0];
 223         int err;
 224
 225         if (!ifidx)
 226                 ifidx = nl80211_get_ifidx(cb);
 227         if (ifidx < 0)
 228                 return ifidx;
 229
 230         cb->args[0] = ifidx;
 231
 232         rtnl_lock();
 233
 234         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 235         if (!*dev) {
 236                 err = -ENODEV;
 237                 goto out_rtnl;
 238         }
 239
 240         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 241         if (IS_ERR(*rdev)) {
 242                 err = PTR_ERR(*rdev);
 243                 goto out_rtnl;
 244         }
 245
 246         return 0;
 247  out_rtnl:
 248         rtnl_unlock();
 249         return err;
 250 }
 251
 252 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 253 {
 254         cfg80211_unlock_rdev(rdev);
 255         rtnl_unlock();
 256 }
 257
 258 /* IE validation */
 259 static bool is_valid_ie_attr(const struct nlattr *attr)
 260 {
 261         const u8 *pos;
 262         int len;
 263
 264         if (!attr)
 265                 return true;
 266
 267         pos = nla_data(attr);
 268         len = nla_len(attr);
 269
 270         while (len) {
 271                 u8 elemlen;
 272
 273                 if (len < 2)
 274                         return false;
 275                 len -= 2;
 276
 277                 elemlen = pos[1];
 278                 if (elemlen > len)
 279                         return false;
 280
 281                 len -= elemlen;
 282                 pos += 2 + elemlen;
 283         }
 284
 285         return true;
 286 }
 287
 288 /* message building helper */
 289 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 290                                    int flags, u8 cmd)
 291 {
 292         /* since there is no private header just add the generic one */
 293         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 294 }
 295
 296 static int nl80211_msg_put_channel(struct sk_buff *msg,
 297                                    struct ieee80211_channel *chan)
 298 {
 299         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 300                     chan->center_freq);
 301
 302         if (chan->flags & IEEE80211_CHAN_DISABLED)
 303                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 304         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 305                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 306         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 307                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 308         if (chan->flags & IEEE80211_CHAN_RADAR)
 309                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 310
 311         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 312                     DBM_TO_MBM(chan->max_power));
 313
 314         return 0;
 315
 316  nla_put_failure:
 317         return -ENOBUFS;
 318 }
 319
 320 /* netlink command implementations */
 321
 322 struct key_parse {
 323         struct key_params p;
 324         int idx;
 325         int type;
 326         bool def, defmgmt;
 327         bool def_uni, def_multi;
 328 };
 329
 330 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 331 {
 332         struct nlattr *tb[NL80211_KEY_MAX + 1];
 333         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 334                                    nl80211_key_policy);
 335         if (err)
 336                 return err;
 337
 338         k->def = !!tb[NL80211_KEY_DEFAULT];
 339         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 340
 341         if (k->def) {
 342                 k->def_uni = true;
 343                 k->def_multi = true;
 344         }
 345         if (k->defmgmt)
 346                 k->def_multi = true;
 347
 348         if (tb[NL80211_KEY_IDX])
 349                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 350
 351         if (tb[NL80211_KEY_DATA]) {
 352                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 353                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 354         }
 355
 356         if (tb[NL80211_KEY_SEQ]) {
 357                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 358                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 359         }
 360
 361         if (tb[NL80211_KEY_CIPHER])
 362                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 363
 364         if (tb[NL80211_KEY_TYPE]) {
 365                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 366                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 367                         return -EINVAL;
 368         }
 369
 370         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 371                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 372                 int err = nla_parse_nested(kdt,
 373                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 374                                            tb[NL80211_KEY_DEFAULT_TYPES],
 375                                            nl80211_key_default_policy);
 376                 if (err)
 377                         return err;
 378
 379                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 380                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 381         }
 382
 383         return 0;
 384 }
 385
 386 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 387 {
 388         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 389                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 390                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 391         }
 392
 393         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 394                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 395                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 396         }
 397
 398         if (info->attrs[NL80211_ATTR_KEY_IDX])
 399                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 400
 401         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 402                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 403
 404         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 405         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 406
 407         if (k->def) {
 408                 k->def_uni = true;
 409                 k->def_multi = true;
 410         }
 411         if (k->defmgmt)
 412                 k->def_multi = true;
 413
 414         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 415                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 416                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 417                         return -EINVAL;
 418         }
 419
 420         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 421                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 422                 int err = nla_parse_nested(
 423                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 424                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 425                                 nl80211_key_default_policy);
 426                 if (err)
 427                         return err;
 428
 429                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 430                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 431         }
 432
 433         return 0;
 434 }
 435
 436 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 437 {
 438         int err;
 439
 440         memset(k, 0, sizeof(*k));
 441         k->idx = -1;
 442         k->type = -1;
 443
 444         if (info->attrs[NL80211_ATTR_KEY])
 445                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 446         else
 447                 err = nl80211_parse_key_old(info, k);
 448
 449         if (err)
 450                 return err;
 451
 452         if (k->def && k->defmgmt)
 453                 return -EINVAL;
 454
 455         if (k->defmgmt) {
 456                 if (k->def_uni || !k->def_multi)
 457                         return -EINVAL;
 458         }
 459
 460         if (k->idx != -1) {
 461                 if (k->defmgmt) {
 462                         if (k->idx < 4 || k->idx > 5)
 463                                 return -EINVAL;
 464                 } else if (k->def) {
 465                         if (k->idx < 0 || k->idx > 3)
 466                                 return -EINVAL;
 467                 } else {
 468                         if (k->idx < 0 || k->idx > 5)
 469                                 return -EINVAL;
 470                 }
 471         }
 472
 473         return 0;
 474 }
 475
 476 static struct cfg80211_cached_keys *
 477 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 478                        struct nlattr *keys)
 479 {
 480         struct key_parse parse;
 481         struct nlattr *key;
 482         struct cfg80211_cached_keys *result;
 483         int rem, err, def = 0;
 484
 485         result = kzalloc(sizeof(*result), GFP_KERNEL);
 486         if (!result)
 487                 return ERR_PTR(-ENOMEM);
 488
 489         result->def = -1;
 490         result->defmgmt = -1;
 491
 492         nla_for_each_nested(key, keys, rem) {
 493                 memset(&parse, 0, sizeof(parse));
 494                 parse.idx = -1;
 495
 496                 err = nl80211_parse_key_new(key, &parse);
 497                 if (err)
 498                         goto error;
 499                 err = -EINVAL;
 500                 if (!parse.p.key)
 501                         goto error;
 502                 if (parse.idx < 0 || parse.idx > 4)
 503                         goto error;
 504                 if (parse.def) {
 505                         if (def)
 506                                 goto error;
 507                         def = 1;
 508                         result->def = parse.idx;
 509                         if (!parse.def_uni || !parse.def_multi)
 510                                 goto error;
 511                 } else if (parse.defmgmt)
 512                         goto error;
 513                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 514                                                      parse.idx, false, NULL);
 515                 if (err)
 516                         goto error;
 517                 result->params[parse.idx].cipher = parse.p.cipher;
 518                 result->params[parse.idx].key_len = parse.p.key_len;
 519                 result->params[parse.idx].key = result->data[parse.idx];
 520                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 521         }
 522
 523         return result;
 524  error:
 525         kfree(result);
 526         return ERR_PTR(err);
 527 }
 528
 529 static int nl80211_key_allowed(struct wireless_dev *wdev)
 530 {
 531         ASSERT_WDEV_LOCK(wdev);
 532
 533         switch (wdev->iftype) {
 534         case NL80211_IFTYPE_AP:
 535         case NL80211_IFTYPE_AP_VLAN:
 536         case NL80211_IFTYPE_P2P_GO:
 537                 break;
 538         case NL80211_IFTYPE_ADHOC:
 539                 if (!wdev->current_bss)
 540                         return -ENOLINK;
 541                 break;
 542         case NL80211_IFTYPE_STATION:
 543         case NL80211_IFTYPE_P2P_CLIENT:
 544                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 545                         return -ENOLINK;
 546                 break;
 547         default:
 548                 return -EINVAL;
 549         }
 550
 551         return 0;
 552 }
 553
 554 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 555                               struct cfg80211_registered_device *dev)
 556 {
 557         void *hdr;
 558         struct nlattr *nl_bands, *nl_band;
 559         struct nlattr *nl_freqs, *nl_freq;
 560         struct nlattr *nl_rates, *nl_rate;
 561         struct nlattr *nl_modes;
 562         struct nlattr *nl_cmds;
 563         enum ieee80211_band band;
 564         struct ieee80211_channel *chan;
 565         struct ieee80211_rate *rate;
 566         int i;
 567         u16 ifmodes = dev->wiphy.interface_modes;
 568         const struct ieee80211_txrx_stypes *mgmt_stypes =
 569                                 dev->wiphy.mgmt_stypes;
 570
 571         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 572         if (!hdr)
 573                 return -1;
 574
 575         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 576         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 577
 578         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 579                     cfg80211_rdev_list_generation);
 580
 581         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 582                    dev->wiphy.retry_short);
 583         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 584                    dev->wiphy.retry_long);
 585         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 586                     dev->wiphy.frag_threshold);
 587         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 588                     dev->wiphy.rts_threshold);
 589         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 590                     dev->wiphy.coverage_class);
 591         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 592                    dev->wiphy.max_scan_ssids);
 593         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 594                     dev->wiphy.max_scan_ie_len);
 595
 596         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 597                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 598         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 599                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 600
 601         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 602                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 603                 dev->wiphy.cipher_suites);
 604
 605         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 606                    dev->wiphy.max_num_pmkids);
 607
 608         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 609                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 610
 611         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 612                     dev->wiphy.available_antennas_tx);
 613         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 614                     dev->wiphy.available_antennas_rx);
 615
 616         if ((dev->wiphy.available_antennas_tx ||
 617              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 618                 u32 tx_ant = 0, rx_ant = 0;
 619                 int res;
 620                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 621                 if (!res) {
 622                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 623                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 624                 }
 625         }
 626
 627         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 628         if (!nl_modes)
 629                 goto nla_put_failure;
 630
 631         i = 0;
 632         while (ifmodes) {
 633                 if (ifmodes & 1)
 634                         NLA_PUT_FLAG(msg, i);
 635                 ifmodes >>= 1;
 636                 i++;
 637         }
 638
 639         nla_nest_end(msg, nl_modes);
 640
 641         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 642         if (!nl_bands)
 643                 goto nla_put_failure;
 644
 645         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 646                 if (!dev->wiphy.bands[band])
 647                         continue;
 648
 649                 nl_band = nla_nest_start(msg, band);
 650                 if (!nl_band)
 651                         goto nla_put_failure;
 652
 653                 /* add HT info */
 654                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 655                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 656                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 657                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 658                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 659                                 dev->wiphy.bands[band]->ht_cap.cap);
 660                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 661                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 662                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 663                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 664                 }
 665
 666                 /* add frequencies */
 667                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 668                 if (!nl_freqs)
 669                         goto nla_put_failure;
 670
 671                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 672                         nl_freq = nla_nest_start(msg, i);
 673                         if (!nl_freq)
 674                                 goto nla_put_failure;
 675
 676                         chan = &dev->wiphy.bands[band]->channels[i];
 677
 678                         if (nl80211_msg_put_channel(msg, chan))
 679                                 goto nla_put_failure;
 680
 681                         nla_nest_end(msg, nl_freq);
 682                 }
 683
 684                 nla_nest_end(msg, nl_freqs);
 685
 686                 /* add bitrates */
 687                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 688                 if (!nl_rates)
 689                         goto nla_put_failure;
 690
 691                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 692                         nl_rate = nla_nest_start(msg, i);
 693                         if (!nl_rate)
 694                                 goto nla_put_failure;
 695
 696                         rate = &dev->wiphy.bands[band]->bitrates[i];
 697                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 698                                     rate->bitrate);
 699                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 700                                 NLA_PUT_FLAG(msg,
 701                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 702
 703                         nla_nest_end(msg, nl_rate);
 704                 }
 705
 706                 nla_nest_end(msg, nl_rates);
 707
 708                 nla_nest_end(msg, nl_band);
 709         }
 710         nla_nest_end(msg, nl_bands);
 711
 712         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 713         if (!nl_cmds)
 714                 goto nla_put_failure;
 715
 716         i = 0;
 717 #define CMD(op, n)                                              \
 718          do {                                                   \
 719                 if (dev->ops->op) {                             \
 720                         i++;                                    \
 721                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 722                 }                                               \
 723         } while (0)
 724
 725         CMD(add_virtual_intf, NEW_INTERFACE);
 726         CMD(change_virtual_intf, SET_INTERFACE);
 727         CMD(add_key, NEW_KEY);
 728         CMD(add_beacon, NEW_BEACON);
 729         CMD(add_station, NEW_STATION);
 730         CMD(add_mpath, NEW_MPATH);
 731         CMD(update_mesh_config, SET_MESH_CONFIG);
 732         CMD(change_bss, SET_BSS);
 733         CMD(auth, AUTHENTICATE);
 734         CMD(assoc, ASSOCIATE);
 735         CMD(deauth, DEAUTHENTICATE);
 736         CMD(disassoc, DISASSOCIATE);
 737         CMD(join_ibss, JOIN_IBSS);
 738         CMD(join_mesh, JOIN_MESH);
 739         CMD(set_pmksa, SET_PMKSA);
 740         CMD(del_pmksa, DEL_PMKSA);
 741         CMD(flush_pmksa, FLUSH_PMKSA);
 742         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 743         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 744         CMD(mgmt_tx, FRAME);
 745         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 746         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 747                 i++;
 748                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 749         }
 750         CMD(set_channel, SET_CHANNEL);
 751         CMD(set_wds_peer, SET_WDS_PEER);
 752
 753 #undef CMD
 754
 755         if (dev->ops->connect || dev->ops->auth) {
 756                 i++;
 757                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 758         }
 759
 760         if (dev->ops->disconnect || dev->ops->deauth) {
 761                 i++;
 762                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 763         }
 764
 765         nla_nest_end(msg, nl_cmds);
 766
 767         if (dev->ops->remain_on_channel)
 768                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 769                             dev->wiphy.max_remain_on_channel_duration);
 770
 771         /* for now at least assume all drivers have it */
 772         if (dev->ops->mgmt_tx)
 773                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 774
 775         if (mgmt_stypes) {
 776                 u16 stypes;
 777                 struct nlattr *nl_ftypes, *nl_ifs;
 778                 enum nl80211_iftype ift;
 779
 780                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 781                 if (!nl_ifs)
 782                         goto nla_put_failure;
 783
 784                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 785                         nl_ftypes = nla_nest_start(msg, ift);
 786                         if (!nl_ftypes)
 787                                 goto nla_put_failure;
 788                         i = 0;
 789                         stypes = mgmt_stypes[ift].tx;
 790                         while (stypes) {
 791                                 if (stypes & 1)
 792                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 793                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 794                                 stypes >>= 1;
 795                                 i++;
 796                         }
 797                         nla_nest_end(msg, nl_ftypes);
 798                 }
 799
 800                 nla_nest_end(msg, nl_ifs);
 801
 802                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 803                 if (!nl_ifs)
 804                         goto nla_put_failure;
 805
 806                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 807                         nl_ftypes = nla_nest_start(msg, ift);
 808                         if (!nl_ftypes)
 809                                 goto nla_put_failure;
 810                         i = 0;
 811                         stypes = mgmt_stypes[ift].rx;
 812                         while (stypes) {
 813                                 if (stypes & 1)
 814                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 815                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 816                                 stypes >>= 1;
 817                                 i++;
 818                         }
 819                         nla_nest_end(msg, nl_ftypes);
 820                 }
 821                 nla_nest_end(msg, nl_ifs);
 822         }
 823
 824         return genlmsg_end(msg, hdr);
 825
 826  nla_put_failure:
 827         genlmsg_cancel(msg, hdr);
 828         return -EMSGSIZE;
 829 }
 830
 831 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 832 {
 833         int idx = 0;
 834         int start = cb->args[0];
 835         struct cfg80211_registered_device *dev;
 836
 837         mutex_lock(&cfg80211_mutex);
 838         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 839                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 840                         continue;
 841                 if (++idx <= start)
 842                         continue;
 843                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 844                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 845                                        dev) < 0) {
 846                         idx--;
 847                         break;
 848                 }
 849         }
 850         mutex_unlock(&cfg80211_mutex);
 851
 852         cb->args[0] = idx;
 853
 854         return skb->len;
 855 }
 856
 857 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 858 {
 859         struct sk_buff *msg;
 860         struct cfg80211_registered_device *dev = info->user_ptr[0];
 861
 862         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 863         if (!msg)
 864                 return -ENOMEM;
 865
 866         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 867                 nlmsg_free(msg);
 868                 return -ENOBUFS;
 869         }
 870
 871         return genlmsg_reply(msg, info);
 872 }
 873
 874 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 875         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 876         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 877         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 878         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 879         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 880 };
 881
 882 static int parse_txq_params(struct nlattr *tb[],
 883                             struct ieee80211_txq_params *txq_params)
 884 {
 885         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 886             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 887             !tb[NL80211_TXQ_ATTR_AIFS])
 888                 return -EINVAL;
 889
 890         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 891         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 892         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 893         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 894         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 895
 896         return 0;
 897 }
 898
 899 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 900 {
 901         /*
 902          * You can only set the channel explicitly for AP, mesh
 903          * and WDS type interfaces; all others have their channel
 904          * managed via their respective "establish a connection"
 905          * command (connect, join, ...)
 906          *
 907          * Monitors are special as they are normally slaved to
 908          * whatever else is going on, so they behave as though
 909          * you tried setting the wiphy channel itself.
 910          */
 911         return !wdev ||
 912                 wdev->iftype == NL80211_IFTYPE_AP ||
 913                 wdev->iftype == NL80211_IFTYPE_WDS ||
 914                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 915                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
 916                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
 917 }
 918
 919 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 920                                  struct wireless_dev *wdev,
 921                                  struct genl_info *info)
 922 {
 923         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 924         u32 freq;
 925         int result;
 926
 927         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 928                 return -EINVAL;
 929
 930         if (!nl80211_can_set_dev_channel(wdev))
 931                 return -EOPNOTSUPP;
 932
 933         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 934                 channel_type = nla_get_u32(info->attrs[
 935                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 936                 if (channel_type != NL80211_CHAN_NO_HT &&
 937                     channel_type != NL80211_CHAN_HT20 &&
 938                     channel_type != NL80211_CHAN_HT40PLUS &&
 939                     channel_type != NL80211_CHAN_HT40MINUS)
 940                         return -EINVAL;
 941         }
 942
 943         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 944
 945         mutex_lock(&rdev->devlist_mtx);
 946         if (wdev) {
 947                 wdev_lock(wdev);
 948                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 949                 wdev_unlock(wdev);
 950         } else {
 951                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 952         }
 953         mutex_unlock(&rdev->devlist_mtx);
 954
 955         return result;
 956 }
 957
 958 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 959 {
 960         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 961         struct net_device *netdev = info->user_ptr[1];
 962
 963         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 964 }
 965
 966 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
 967 {
 968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 969         struct net_device *dev = info->user_ptr[1];
 970         struct wireless_dev *wdev = dev->ieee80211_ptr;
 971         const u8 *bssid;
 972
 973         if (!info->attrs[NL80211_ATTR_MAC])
 974                 return -EINVAL;
 975
 976         if (netif_running(dev))
 977                 return -EBUSY;
 978
 979         if (!rdev->ops->set_wds_peer)
 980                 return -EOPNOTSUPP;
 981
 982         if (wdev->iftype != NL80211_IFTYPE_WDS)
 983                 return -EOPNOTSUPP;
 984
 985         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 986         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
 987 }
 988
 989
 990 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 991 {
 992         struct cfg80211_registered_device *rdev;
 993         struct net_device *netdev = NULL;
 994         struct wireless_dev *wdev;
 995         int result = 0, rem_txq_params = 0;
 996         struct nlattr *nl_txq_params;
 997         u32 changed;
 998         u8 retry_short = 0, retry_long = 0;
 999         u32 frag_threshold = 0, rts_threshold = 0;
1000         u8 coverage_class = 0;
1001
1002         /*
1003          * Try to find the wiphy and netdev. Normally this
1004          * function shouldn't need the netdev, but this is
1005          * done for backward compatibility -- previously
1006          * setting the channel was done per wiphy, but now
1007          * it is per netdev. Previous userland like hostapd
1008          * also passed a netdev to set_wiphy, so that it is
1009          * possible to let that go to the right netdev!
1010          */
1011         mutex_lock(&cfg80211_mutex);
1012
1013         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1014                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1015
1016                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1017                 if (netdev && netdev->ieee80211_ptr) {
1018                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1019                         mutex_lock(&rdev->mtx);
1020                 } else
1021                         netdev = NULL;
1022         }
1023
1024         if (!netdev) {
1025                 rdev = __cfg80211_rdev_from_info(info);
1026                 if (IS_ERR(rdev)) {
1027                         mutex_unlock(&cfg80211_mutex);
1028                         return PTR_ERR(rdev);
1029                 }
1030                 wdev = NULL;
1031                 netdev = NULL;
1032                 result = 0;
1033
1034                 mutex_lock(&rdev->mtx);
1035         } else if (netif_running(netdev) &&
1036                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1037                 wdev = netdev->ieee80211_ptr;
1038         else
1039                 wdev = NULL;
1040
1041         /*
1042          * end workaround code, by now the rdev is available
1043          * and locked, and wdev may or may not be NULL.
1044          */
1045
1046         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1047                 result = cfg80211_dev_rename(
1048                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1049
1050         mutex_unlock(&cfg80211_mutex);
1051
1052         if (result)
1053                 goto bad_res;
1054
1055         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1056                 struct ieee80211_txq_params txq_params;
1057                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1058
1059                 if (!rdev->ops->set_txq_params) {
1060                         result = -EOPNOTSUPP;
1061                         goto bad_res;
1062                 }
1063
1064                 nla_for_each_nested(nl_txq_params,
1065                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1066                                     rem_txq_params) {
1067                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1068                                   nla_data(nl_txq_params),
1069                                   nla_len(nl_txq_params),
1070                                   txq_params_policy);
1071                         result = parse_txq_params(tb, &txq_params);
1072                         if (result)
1073                                 goto bad_res;
1074
1075                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1076                                                            &txq_params);
1077                         if (result)
1078                                 goto bad_res;
1079                 }
1080         }
1081
1082         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1083                 result = __nl80211_set_channel(rdev, wdev, info);
1084                 if (result)
1085                         goto bad_res;
1086         }
1087
1088         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1089                 enum nl80211_tx_power_setting type;
1090                 int idx, mbm = 0;
1091
1092                 if (!rdev->ops->set_tx_power) {
1093                         result = -EOPNOTSUPP;
1094                         goto bad_res;
1095                 }
1096
1097                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1098                 type = nla_get_u32(info->attrs[idx]);
1099
1100                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1101                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1102                         result = -EINVAL;
1103                         goto bad_res;
1104                 }
1105
1106                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1107                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1108                         mbm = nla_get_u32(info->attrs[idx]);
1109                 }
1110
1111                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1112                 if (result)
1113                         goto bad_res;
1114         }
1115
1116         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1117             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1118                 u32 tx_ant, rx_ant;
1119                 if ((!rdev->wiphy.available_antennas_tx &&
1120                      !rdev->wiphy.available_antennas_rx) ||
1121                     !rdev->ops->set_antenna) {
1122                         result = -EOPNOTSUPP;
1123                         goto bad_res;
1124                 }
1125
1126                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1127                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1128
1129                 /* reject antenna configurations which don't match the
1130                  * available antenna masks, except for the "all" mask */
1131                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1132                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1133                         result = -EINVAL;
1134                         goto bad_res;
1135                 }
1136
1137                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1138                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1139
1140                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1141                 if (result)
1142                         goto bad_res;
1143         }
1144
1145         changed = 0;
1146
1147         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1148                 retry_short = nla_get_u8(
1149                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1150                 if (retry_short == 0) {
1151                         result = -EINVAL;
1152                         goto bad_res;
1153                 }
1154                 changed |= WIPHY_PARAM_RETRY_SHORT;
1155         }
1156
1157         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1158                 retry_long = nla_get_u8(
1159                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1160                 if (retry_long == 0) {
1161                         result = -EINVAL;
1162                         goto bad_res;
1163                 }
1164                 changed |= WIPHY_PARAM_RETRY_LONG;
1165         }
1166
1167         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1168                 frag_threshold = nla_get_u32(
1169                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1170                 if (frag_threshold < 256) {
1171                         result = -EINVAL;
1172                         goto bad_res;
1173                 }
1174                 if (frag_threshold != (u32) -1) {
1175                         /*
1176                          * Fragments (apart from the last one) are required to
1177                          * have even length. Make the fragmentation code
1178                          * simpler by stripping LSB should someone try to use
1179                          * odd threshold value.
1180                          */
1181                         frag_threshold &= ~0x1;
1182                 }
1183                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1184         }
1185
1186         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1187                 rts_threshold = nla_get_u32(
1188                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1189                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1190         }
1191
1192         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1193                 coverage_class = nla_get_u8(
1194                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1195                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1196         }
1197
1198         if (changed) {
1199                 u8 old_retry_short, old_retry_long;
1200                 u32 old_frag_threshold, old_rts_threshold;
1201                 u8 old_coverage_class;
1202
1203                 if (!rdev->ops->set_wiphy_params) {
1204                         result = -EOPNOTSUPP;
1205                         goto bad_res;
1206                 }
1207
1208                 old_retry_short = rdev->wiphy.retry_short;
1209                 old_retry_long = rdev->wiphy.retry_long;
1210                 old_frag_threshold = rdev->wiphy.frag_threshold;
1211                 old_rts_threshold = rdev->wiphy.rts_threshold;
1212                 old_coverage_class = rdev->wiphy.coverage_class;
1213
1214                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1215                         rdev->wiphy.retry_short = retry_short;
1216                 if (changed & WIPHY_PARAM_RETRY_LONG)
1217                         rdev->wiphy.retry_long = retry_long;
1218                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1219                         rdev->wiphy.frag_threshold = frag_threshold;
1220                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1221                         rdev->wiphy.rts_threshold = rts_threshold;
1222                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1223                         rdev->wiphy.coverage_class = coverage_class;
1224
1225                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1226                 if (result) {
1227                         rdev->wiphy.retry_short = old_retry_short;
1228                         rdev->wiphy.retry_long = old_retry_long;
1229                         rdev->wiphy.frag_threshold = old_frag_threshold;
1230                         rdev->wiphy.rts_threshold = old_rts_threshold;
1231                         rdev->wiphy.coverage_class = old_coverage_class;
1232                 }
1233         }
1234
1235  bad_res:
1236         mutex_unlock(&rdev->mtx);
1237         if (netdev)
1238                 dev_put(netdev);
1239         return result;
1240 }
1241
1242
1243 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1244                               struct cfg80211_registered_device *rdev,
1245                               struct net_device *dev)
1246 {
1247         void *hdr;
1248
1249         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1250         if (!hdr)
1251                 return -1;
1252
1253         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1254         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1255         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1256         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1257
1258         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1259                     rdev->devlist_generation ^
1260                         (cfg80211_rdev_list_generation << 2));
1261
1262         return genlmsg_end(msg, hdr);
1263
1264  nla_put_failure:
1265         genlmsg_cancel(msg, hdr);
1266         return -EMSGSIZE;
1267 }
1268
1269 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1270 {
1271         int wp_idx = 0;
1272         int if_idx = 0;
1273         int wp_start = cb->args[0];
1274         int if_start = cb->args[1];
1275         struct cfg80211_registered_device *rdev;
1276         struct wireless_dev *wdev;
1277
1278         mutex_lock(&cfg80211_mutex);
1279         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1280                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1281                         continue;
1282                 if (wp_idx < wp_start) {
1283                         wp_idx++;
1284                         continue;
1285                 }
1286                 if_idx = 0;
1287
1288                 mutex_lock(&rdev->devlist_mtx);
1289                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1290                         if (if_idx < if_start) {
1291                                 if_idx++;
1292                                 continue;
1293                         }
1294                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1295                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1296                                                rdev, wdev->netdev) < 0) {
1297                                 mutex_unlock(&rdev->devlist_mtx);
1298                                 goto out;
1299                         }
1300                         if_idx++;
1301                 }
1302                 mutex_unlock(&rdev->devlist_mtx);
1303
1304                 wp_idx++;
1305         }
1306  out:
1307         mutex_unlock(&cfg80211_mutex);
1308
1309         cb->args[0] = wp_idx;
1310         cb->args[1] = if_idx;
1311
1312         return skb->len;
1313 }
1314
1315 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1316 {
1317         struct sk_buff *msg;
1318         struct cfg80211_registered_device *dev = info->user_ptr[0];
1319         struct net_device *netdev = info->user_ptr[1];
1320
1321         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1322         if (!msg)
1323                 return -ENOMEM;
1324
1325         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1326                                dev, netdev) < 0) {
1327                 nlmsg_free(msg);
1328                 return -ENOBUFS;
1329         }
1330
1331         return genlmsg_reply(msg, info);
1332 }
1333
1334 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1335         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1336         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1337         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1338         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1339         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1340 };
1341
1342 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1343 {
1344         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1345         int flag;
1346
1347         *mntrflags = 0;
1348
1349         if (!nla)
1350                 return -EINVAL;
1351
1352         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1353                              nla, mntr_flags_policy))
1354                 return -EINVAL;
1355
1356         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1357                 if (flags[flag])
1358                         *mntrflags |= (1<<flag);
1359
1360         return 0;
1361 }
1362
1363 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1364                                struct net_device *netdev, u8 use_4addr,
1365                                enum nl80211_iftype iftype)
1366 {
1367         if (!use_4addr) {
1368                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1369                         return -EBUSY;
1370                 return 0;
1371         }
1372
1373         switch (iftype) {
1374         case NL80211_IFTYPE_AP_VLAN:
1375                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1376                         return 0;
1377                 break;
1378         case NL80211_IFTYPE_STATION:
1379                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1380                         return 0;
1381                 break;
1382         default:
1383                 break;
1384         }
1385
1386         return -EOPNOTSUPP;
1387 }
1388
1389 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1390 {
1391         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1392         struct vif_params params;
1393         int err;
1394         enum nl80211_iftype otype, ntype;
1395         struct net_device *dev = info->user_ptr[1];
1396         u32 _flags, *flags = NULL;
1397         bool change = false;
1398
1399         memset(&params, 0, sizeof(params));
1400
1401         otype = ntype = dev->ieee80211_ptr->iftype;
1402
1403         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1404                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1405                 if (otype != ntype)
1406                         change = true;
1407                 if (ntype > NL80211_IFTYPE_MAX)
1408                         return -EINVAL;
1409         }
1410
1411         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1412                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1413
1414                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1415                         return -EINVAL;
1416                 if (netif_running(dev))
1417                         return -EBUSY;
1418
1419                 wdev_lock(wdev);
1420                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1421                              IEEE80211_MAX_MESH_ID_LEN);
1422                 wdev->mesh_id_up_len =
1423                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1424                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1425                        wdev->mesh_id_up_len);
1426                 wdev_unlock(wdev);
1427         }
1428
1429         if (info->attrs[NL80211_ATTR_4ADDR]) {
1430                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1431                 change = true;
1432                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1433                 if (err)
1434                         return err;
1435         } else {
1436                 params.use_4addr = -1;
1437         }
1438
1439         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1440                 if (ntype != NL80211_IFTYPE_MONITOR)
1441                         return -EINVAL;
1442                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1443                                           &_flags);
1444                 if (err)
1445                         return err;
1446
1447                 flags = &_flags;
1448                 change = true;
1449         }
1450
1451         if (change)
1452                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1453         else
1454                 err = 0;
1455
1456         if (!err && params.use_4addr != -1)
1457                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1458
1459         return err;
1460 }
1461
1462 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1463 {
1464         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1465         struct vif_params params;
1466         struct net_device *dev;
1467         int err;
1468         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1469         u32 flags;
1470
1471         memset(&params, 0, sizeof(params));
1472
1473         if (!info->attrs[NL80211_ATTR_IFNAME])
1474                 return -EINVAL;
1475
1476         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1477                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1478                 if (type > NL80211_IFTYPE_MAX)
1479                         return -EINVAL;
1480         }
1481
1482         if (!rdev->ops->add_virtual_intf ||
1483             !(rdev->wiphy.interface_modes & (1 << type)))
1484                 return -EOPNOTSUPP;
1485
1486         if (info->attrs[NL80211_ATTR_4ADDR]) {
1487                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1488                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1489                 if (err)
1490                         return err;
1491         }
1492
1493         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1494                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1495                                   &flags);
1496         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1497                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1498                 type, err ? NULL : &flags, &params);
1499         if (IS_ERR(dev))
1500                 return PTR_ERR(dev);
1501
1502         if (type == NL80211_IFTYPE_MESH_POINT &&
1503             info->attrs[NL80211_ATTR_MESH_ID]) {
1504                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1505
1506                 wdev_lock(wdev);
1507                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1508                              IEEE80211_MAX_MESH_ID_LEN);
1509                 wdev->mesh_id_up_len =
1510                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1511                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1512                        wdev->mesh_id_up_len);
1513                 wdev_unlock(wdev);
1514         }
1515
1516         return 0;
1517 }
1518
1519 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1520 {
1521         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1522         struct net_device *dev = info->user_ptr[1];
1523
1524         if (!rdev->ops->del_virtual_intf)
1525                 return -EOPNOTSUPP;
1526
1527         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1528 }
1529
1530 struct get_key_cookie {
1531         struct sk_buff *msg;
1532         int error;
1533         int idx;
1534 };
1535
1536 static void get_key_callback(void *c, struct key_params *params)
1537 {
1538         struct nlattr *key;
1539         struct get_key_cookie *cookie = c;
1540
1541         if (params->key)
1542                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1543                         params->key_len, params->key);
1544
1545         if (params->seq)
1546                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1547                         params->seq_len, params->seq);
1548
1549         if (params->cipher)
1550                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1551                             params->cipher);
1552
1553         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1554         if (!key)
1555                 goto nla_put_failure;
1556
1557         if (params->key)
1558                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1559                         params->key_len, params->key);
1560
1561         if (params->seq)
1562                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1563                         params->seq_len, params->seq);
1564
1565         if (params->cipher)
1566                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1567                             params->cipher);
1568
1569         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1570
1571         nla_nest_end(cookie->msg, key);
1572
1573         return;
1574  nla_put_failure:
1575         cookie->error = 1;
1576 }
1577
1578 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1579 {
1580         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1581         int err;
1582         struct net_device *dev = info->user_ptr[1];
1583         u8 key_idx = 0;
1584         const u8 *mac_addr = NULL;
1585         bool pairwise;
1586         struct get_key_cookie cookie = {
1587                 .error = 0,
1588         };
1589         void *hdr;
1590         struct sk_buff *msg;
1591
1592         if (info->attrs[NL80211_ATTR_KEY_IDX])
1593                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1594
1595         if (key_idx > 5)
1596                 return -EINVAL;
1597
1598         if (info->attrs[NL80211_ATTR_MAC])
1599                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1600
1601         pairwise = !!mac_addr;
1602         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1603                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1604                 if (kt >= NUM_NL80211_KEYTYPES)
1605                         return -EINVAL;
1606                 if (kt != NL80211_KEYTYPE_GROUP &&
1607                     kt != NL80211_KEYTYPE_PAIRWISE)
1608                         return -EINVAL;
1609                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1610         }
1611
1612         if (!rdev->ops->get_key)
1613                 return -EOPNOTSUPP;
1614
1615         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1616         if (!msg)
1617                 return -ENOMEM;
1618
1619         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1620                              NL80211_CMD_NEW_KEY);
1621         if (IS_ERR(hdr))
1622                 return PTR_ERR(hdr);
1623
1624         cookie.msg = msg;
1625         cookie.idx = key_idx;
1626
1627         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1628         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1629         if (mac_addr)
1630                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1631
1632         if (pairwise && mac_addr &&
1633             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1634                 return -ENOENT;
1635
1636         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1637                                  mac_addr, &cookie, get_key_callback);
1638
1639         if (err)
1640                 goto free_msg;
1641
1642         if (cookie.error)
1643                 goto nla_put_failure;
1644
1645         genlmsg_end(msg, hdr);
1646         return genlmsg_reply(msg, info);
1647
1648  nla_put_failure:
1649         err = -ENOBUFS;
1650  free_msg:
1651         nlmsg_free(msg);
1652         return err;
1653 }
1654
1655 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1656 {
1657         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1658         struct key_parse key;
1659         int err;
1660         struct net_device *dev = info->user_ptr[1];
1661
1662         err = nl80211_parse_key(info, &key);
1663         if (err)
1664                 return err;
1665
1666         if (key.idx < 0)
1667                 return -EINVAL;
1668
1669         /* only support setting default key */
1670         if (!key.def && !key.defmgmt)
1671                 return -EINVAL;
1672
1673         wdev_lock(dev->ieee80211_ptr);
1674
1675         if (key.def) {
1676                 if (!rdev->ops->set_default_key) {
1677                         err = -EOPNOTSUPP;
1678                         goto out;
1679                 }
1680
1681                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1682                 if (err)
1683                         goto out;
1684
1685                 if (!(rdev->wiphy.flags &
1686                                 WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS)) {
1687                         if (!key.def_uni || !key.def_multi) {
1688                                 err = -EOPNOTSUPP;
1689                                 goto out;
1690                         }
1691                 }
1692
1693                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1694                                                  key.def_uni, key.def_multi);
1695
1696                 if (err)
1697                         goto out;
1698
1699 #ifdef CONFIG_CFG80211_WEXT
1700                 dev->ieee80211_ptr->wext.default_key = key.idx;
1701 #endif
1702         } else {
1703                 if (key.def_uni || !key.def_multi) {
1704                         err = -EINVAL;
1705                         goto out;
1706                 }
1707
1708                 if (!rdev->ops->set_default_mgmt_key) {
1709                         err = -EOPNOTSUPP;
1710                         goto out;
1711                 }
1712
1713                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1714                 if (err)
1715                         goto out;
1716
1717                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1718                                                       dev, key.idx);
1719                 if (err)
1720                         goto out;
1721
1722 #ifdef CONFIG_CFG80211_WEXT
1723                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1724 #endif
1725         }
1726
1727  out:
1728         wdev_unlock(dev->ieee80211_ptr);
1729
1730         return err;
1731 }
1732
1733 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1734 {
1735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1736         int err;
1737         struct net_device *dev = info->user_ptr[1];
1738         struct key_parse key;
1739         const u8 *mac_addr = NULL;
1740
1741         err = nl80211_parse_key(info, &key);
1742         if (err)
1743                 return err;
1744
1745         if (!key.p.key)
1746                 return -EINVAL;
1747
1748         if (info->attrs[NL80211_ATTR_MAC])
1749                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1750
1751         if (key.type == -1) {
1752                 if (mac_addr)
1753                         key.type = NL80211_KEYTYPE_PAIRWISE;
1754                 else
1755                         key.type = NL80211_KEYTYPE_GROUP;
1756         }
1757
1758         /* for now */
1759         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1760             key.type != NL80211_KEYTYPE_GROUP)
1761                 return -EINVAL;
1762
1763         if (!rdev->ops->add_key)
1764                 return -EOPNOTSUPP;
1765
1766         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1767                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1768                                            mac_addr))
1769                 return -EINVAL;
1770
1771         wdev_lock(dev->ieee80211_ptr);
1772         err = nl80211_key_allowed(dev->ieee80211_ptr);
1773         if (!err)
1774                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1775                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1776                                          mac_addr, &key.p);
1777         wdev_unlock(dev->ieee80211_ptr);
1778
1779         return err;
1780 }
1781
1782 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1783 {
1784         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1785         int err;
1786         struct net_device *dev = info->user_ptr[1];
1787         u8 *mac_addr = NULL;
1788         struct key_parse key;
1789
1790         err = nl80211_parse_key(info, &key);
1791         if (err)
1792                 return err;
1793
1794         if (info->attrs[NL80211_ATTR_MAC])
1795                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1796
1797         if (key.type == -1) {
1798                 if (mac_addr)
1799                         key.type = NL80211_KEYTYPE_PAIRWISE;
1800                 else
1801                         key.type = NL80211_KEYTYPE_GROUP;
1802         }
1803
1804         /* for now */
1805         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1806             key.type != NL80211_KEYTYPE_GROUP)
1807                 return -EINVAL;
1808
1809         if (!rdev->ops->del_key)
1810                 return -EOPNOTSUPP;
1811
1812         wdev_lock(dev->ieee80211_ptr);
1813         err = nl80211_key_allowed(dev->ieee80211_ptr);
1814
1815         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1816             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1817                 err = -ENOENT;
1818
1819         if (!err)
1820                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1821                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1822                                          mac_addr);
1823
1824 #ifdef CONFIG_CFG80211_WEXT
1825         if (!err) {
1826                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1827                         dev->ieee80211_ptr->wext.default_key = -1;
1828                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1829                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1830         }
1831 #endif
1832         wdev_unlock(dev->ieee80211_ptr);
1833
1834         return err;
1835 }
1836
1837 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1838 {
1839         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1840                     struct beacon_parameters *info);
1841         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1842         struct net_device *dev = info->user_ptr[1];
1843         struct beacon_parameters params;
1844         int haveinfo = 0;
1845
1846         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1847                 return -EINVAL;
1848
1849         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1850             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1851                 return -EOPNOTSUPP;
1852
1853         switch (info->genlhdr->cmd) {
1854         case NL80211_CMD_NEW_BEACON:
1855                 /* these are required for NEW_BEACON */
1856                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1857                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1858                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1859                         return -EINVAL;
1860
1861                 call = rdev->ops->add_beacon;
1862                 break;
1863         case NL80211_CMD_SET_BEACON:
1864                 call = rdev->ops->set_beacon;
1865                 break;
1866         default:
1867                 WARN_ON(1);
1868                 return -EOPNOTSUPP;
1869         }
1870
1871         if (!call)
1872                 return -EOPNOTSUPP;
1873
1874         memset(&params, 0, sizeof(params));
1875
1876         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1877                 params.interval =
1878                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1879                 haveinfo = 1;
1880         }
1881
1882         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1883                 params.dtim_period =
1884                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1885                 haveinfo = 1;
1886         }
1887
1888         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1889                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1890                 params.head_len =
1891                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1892                 haveinfo = 1;
1893         }
1894
1895         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1896                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1897                 params.tail_len =
1898                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1899                 haveinfo = 1;
1900         }
1901
1902         if (!haveinfo)
1903                 return -EINVAL;
1904
1905         return call(&rdev->wiphy, dev, &params);
1906 }
1907
1908 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1909 {
1910         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1911         struct net_device *dev = info->user_ptr[1];
1912
1913         if (!rdev->ops->del_beacon)
1914                 return -EOPNOTSUPP;
1915
1916         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1917             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1918                 return -EOPNOTSUPP;
1919
1920         return rdev->ops->del_beacon(&rdev->wiphy, dev);
1921 }
1922
1923 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1924         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1925         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1926         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1927         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1928         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
1929 };
1930
1931 static int parse_station_flags(struct genl_info *info,
1932                                struct station_parameters *params)
1933 {
1934         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1935         struct nlattr *nla;
1936         int flag;
1937
1938         /*
1939          * Try parsing the new attribute first so userspace
1940          * can specify both for older kernels.
1941          */
1942         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1943         if (nla) {
1944                 struct nl80211_sta_flag_update *sta_flags;
1945
1946                 sta_flags = nla_data(nla);
1947                 params->sta_flags_mask = sta_flags->mask;
1948                 params->sta_flags_set = sta_flags->set;
1949                 if ((params->sta_flags_mask |
1950                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1951                         return -EINVAL;
1952                 return 0;
1953         }
1954
1955         /* if present, parse the old attribute */
1956
1957         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1958         if (!nla)
1959                 return 0;
1960
1961         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1962                              nla, sta_flags_policy))
1963                 return -EINVAL;
1964
1965         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1966         params->sta_flags_mask &= ~1;
1967
1968         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1969                 if (flags[flag])
1970                         params->sta_flags_set |= (1<<flag);
1971
1972         return 0;
1973 }
1974
1975 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
1976                                  int attr)
1977 {
1978         struct nlattr *rate;
1979         u16 bitrate;
1980
1981         rate = nla_nest_start(msg, attr);
1982         if (!rate)
1983                 goto nla_put_failure;
1984
1985         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1986         bitrate = cfg80211_calculate_bitrate(info);
1987         if (bitrate > 0)
1988                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1989
1990         if (info->flags & RATE_INFO_FLAGS_MCS)
1991                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
1992         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1993                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1994         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
1995                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1996
1997         nla_nest_end(msg, rate);
1998         return true;
1999
2000 nla_put_failure:
2001         return false;
2002 }
2003
2004 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2005                                 int flags, struct net_device *dev,
2006                                 const u8 *mac_addr, struct station_info *sinfo)
2007 {
2008         void *hdr;
2009         struct nlattr *sinfoattr, *bss_param;
2010
2011         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2012         if (!hdr)
2013                 return -1;
2014
2015         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2016         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2017
2018         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2019
2020         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2021         if (!sinfoattr)
2022                 goto nla_put_failure;
2023         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2024                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2025                             sinfo->inactive_time);
2026         if (sinfo->filled & STATION_INFO_RX_BYTES)
2027                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2028                             sinfo->rx_bytes);
2029         if (sinfo->filled & STATION_INFO_TX_BYTES)
2030                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2031                             sinfo->tx_bytes);
2032         if (sinfo->filled & STATION_INFO_LLID)
2033                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2034                             sinfo->llid);
2035         if (sinfo->filled & STATION_INFO_PLID)
2036                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2037                             sinfo->plid);
2038         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2039                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2040                             sinfo->plink_state);
2041         if (sinfo->filled & STATION_INFO_SIGNAL)
2042                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2043                            sinfo->signal);
2044         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2045                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2046                            sinfo->signal_avg);
2047         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2048                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2049                                           NL80211_STA_INFO_TX_BITRATE))
2050                         goto nla_put_failure;
2051         }
2052         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2053                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2054                                           NL80211_STA_INFO_RX_BITRATE))
2055                         goto nla_put_failure;
2056         }
2057         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2058                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2059                             sinfo->rx_packets);
2060         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2061                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2062                             sinfo->tx_packets);
2063         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2064                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2065                             sinfo->tx_retries);
2066         if (sinfo->filled & STATION_INFO_TX_FAILED)
2067                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2068                             sinfo->tx_failed);
2069         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2070                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2071                 if (!bss_param)
2072                         goto nla_put_failure;
2073
2074                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2075                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2076                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2077                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2078                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2079                         NLA_PUT_FLAG(msg,
2080                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2081                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2082                            sinfo->bss_param.dtim_period);
2083                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2084                             sinfo->bss_param.beacon_interval);
2085
2086                 nla_nest_end(msg, bss_param);
2087         }
2088         nla_nest_end(msg, sinfoattr);
2089
2090         return genlmsg_end(msg, hdr);
2091
2092  nla_put_failure:
2093         genlmsg_cancel(msg, hdr);
2094         return -EMSGSIZE;
2095 }
2096
2097 static int nl80211_dump_station(struct sk_buff *skb,
2098                                 struct netlink_callback *cb)
2099 {
2100         struct station_info sinfo;
2101         struct cfg80211_registered_device *dev;
2102         struct net_device *netdev;
2103         u8 mac_addr[ETH_ALEN];
2104         int sta_idx = cb->args[1];
2105         int err;
2106
2107         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2108         if (err)
2109                 return err;
2110
2111         if (!dev->ops->dump_station) {
2112                 err = -EOPNOTSUPP;
2113                 goto out_err;
2114         }
2115
2116         while (1) {
2117                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2118                                              mac_addr, &sinfo);
2119                 if (err == -ENOENT)
2120                         break;
2121                 if (err)
2122                         goto out_err;
2123
2124                 if (nl80211_send_station(skb,
2125                                 NETLINK_CB(cb->skb).pid,
2126                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2127                                 netdev, mac_addr,
2128                                 &sinfo) < 0)
2129                         goto out;
2130
2131                 sta_idx++;
2132         }
2133
2134
2135  out:
2136         cb->args[1] = sta_idx;
2137         err = skb->len;
2138  out_err:
2139         nl80211_finish_netdev_dump(dev);
2140
2141         return err;
2142 }
2143
2144 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2145 {
2146         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2147         struct net_device *dev = info->user_ptr[1];
2148         struct station_info sinfo;
2149         struct sk_buff *msg;
2150         u8 *mac_addr = NULL;
2151         int err;
2152
2153         memset(&sinfo, 0, sizeof(sinfo));
2154
2155         if (!info->attrs[NL80211_ATTR_MAC])
2156                 return -EINVAL;
2157
2158         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2159
2160         if (!rdev->ops->get_station)
2161                 return -EOPNOTSUPP;
2162
2163         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2164         if (err)
2165                 return err;
2166
2167         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2168         if (!msg)
2169                 return -ENOMEM;
2170
2171         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2172                                  dev, mac_addr, &sinfo) < 0) {
2173                 nlmsg_free(msg);
2174                 return -ENOBUFS;
2175         }
2176
2177         return genlmsg_reply(msg, info);
2178 }
2179
2180 /*
2181  * Get vlan interface making sure it is running and on the right wiphy.
2182  */
2183 static int get_vlan(struct genl_info *info,
2184                     struct cfg80211_registered_device *rdev,
2185                     struct net_device **vlan)
2186 {
2187         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2188         *vlan = NULL;
2189
2190         if (vlanattr) {
2191                 *vlan = dev_get_by_index(genl_info_net(info),
2192                                          nla_get_u32(vlanattr));
2193                 if (!*vlan)
2194                         return -ENODEV;
2195                 if (!(*vlan)->ieee80211_ptr)
2196                         return -EINVAL;
2197                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2198                         return -EINVAL;
2199                 if (!netif_running(*vlan))
2200                         return -ENETDOWN;
2201         }
2202         return 0;
2203 }
2204
2205 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2206 {
2207         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2208         int err;
2209         struct net_device *dev = info->user_ptr[1];
2210         struct station_parameters params;
2211         u8 *mac_addr = NULL;
2212
2213         memset(&params, 0, sizeof(params));
2214
2215         params.listen_interval = -1;
2216
2217         if (info->attrs[NL80211_ATTR_STA_AID])
2218                 return -EINVAL;
2219
2220         if (!info->attrs[NL80211_ATTR_MAC])
2221                 return -EINVAL;
2222
2223         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2224
2225         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2226                 params.supported_rates =
2227                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2228                 params.supported_rates_len =
2229                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2230         }
2231
2232         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2233                 params.listen_interval =
2234                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2235
2236         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2237                 params.ht_capa =
2238                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2239
2240         if (parse_station_flags(info, &params))
2241                 return -EINVAL;
2242
2243         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2244                 params.plink_action =
2245                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2246
2247         err = get_vlan(info, rdev, &params.vlan);
2248         if (err)
2249                 goto out;
2250
2251         /* validate settings */
2252         err = 0;
2253
2254         switch (dev->ieee80211_ptr->iftype) {
2255         case NL80211_IFTYPE_AP:
2256         case NL80211_IFTYPE_AP_VLAN:
2257         case NL80211_IFTYPE_P2P_GO:
2258                 /* disallow mesh-specific things */
2259                 if (params.plink_action)
2260                         err = -EINVAL;
2261                 break;
2262         case NL80211_IFTYPE_P2P_CLIENT:
2263         case NL80211_IFTYPE_STATION:
2264                 /* disallow everything but AUTHORIZED flag */
2265                 if (params.plink_action)
2266                         err = -EINVAL;
2267                 if (params.vlan)
2268                         err = -EINVAL;
2269                 if (params.supported_rates)
2270                         err = -EINVAL;
2271                 if (params.ht_capa)
2272                         err = -EINVAL;
2273                 if (params.listen_interval >= 0)
2274                         err = -EINVAL;
2275                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2276                         err = -EINVAL;
2277                 break;
2278         case NL80211_IFTYPE_MESH_POINT:
2279                 /* disallow things mesh doesn't support */
2280                 if (params.vlan)
2281                         err = -EINVAL;
2282                 if (params.ht_capa)
2283                         err = -EINVAL;
2284                 if (params.listen_interval >= 0)
2285                         err = -EINVAL;
2286                 if (params.supported_rates)
2287                         err = -EINVAL;
2288                 if (params.sta_flags_mask &
2289                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2290                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2291                         err = -EINVAL;
2292                 break;
2293         default:
2294                 err = -EINVAL;
2295         }
2296
2297         if (err)
2298                 goto out;
2299
2300         if (!rdev->ops->change_station) {
2301                 err = -EOPNOTSUPP;
2302                 goto out;
2303         }
2304
2305         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2306
2307  out:
2308         if (params.vlan)
2309                 dev_put(params.vlan);
2310
2311         return err;
2312 }
2313
2314 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2315 {
2316         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2317         int err;
2318         struct net_device *dev = info->user_ptr[1];
2319         struct station_parameters params;
2320         u8 *mac_addr = NULL;
2321
2322         memset(&params, 0, sizeof(params));
2323
2324         if (!info->attrs[NL80211_ATTR_MAC])
2325                 return -EINVAL;
2326
2327         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2328                 return -EINVAL;
2329
2330         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2331                 return -EINVAL;
2332
2333         if (!info->attrs[NL80211_ATTR_STA_AID])
2334                 return -EINVAL;
2335
2336         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2337         params.supported_rates =
2338                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2339         params.supported_rates_len =
2340                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2341         params.listen_interval =
2342                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2343
2344         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2345         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2346                 return -EINVAL;
2347
2348         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2349                 params.ht_capa =
2350                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2351
2352         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2353                 params.plink_action =
2354                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2355
2356         if (parse_station_flags(info, &params))
2357                 return -EINVAL;
2358
2359         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2360             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2361             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2362             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2363                 return -EINVAL;
2364
2365         err = get_vlan(info, rdev, &params.vlan);
2366         if (err)
2367                 goto out;
2368
2369         /* validate settings */
2370         err = 0;
2371
2372         if (!rdev->ops->add_station) {
2373                 err = -EOPNOTSUPP;
2374                 goto out;
2375         }
2376
2377         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2378
2379  out:
2380         if (params.vlan)
2381                 dev_put(params.vlan);
2382         return err;
2383 }
2384
2385 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2386 {
2387         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2388         struct net_device *dev = info->user_ptr[1];
2389         u8 *mac_addr = NULL;
2390
2391         if (info->attrs[NL80211_ATTR_MAC])
2392                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2393
2394         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2395             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2396             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2397             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2398                 return -EINVAL;
2399
2400         if (!rdev->ops->del_station)
2401                 return -EOPNOTSUPP;
2402
2403         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2404 }
2405
2406 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2407                                 int flags, struct net_device *dev,
2408                                 u8 *dst, u8 *next_hop,
2409                                 struct mpath_info *pinfo)
2410 {
2411         void *hdr;
2412         struct nlattr *pinfoattr;
2413
2414         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2415         if (!hdr)
2416                 return -1;
2417
2418         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2419         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2420         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2421
2422         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2423
2424         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2425         if (!pinfoattr)
2426                 goto nla_put_failure;
2427         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2428                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2429                             pinfo->frame_qlen);
2430         if (pinfo->filled & MPATH_INFO_SN)
2431                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2432                             pinfo->sn);
2433         if (pinfo->filled & MPATH_INFO_METRIC)
2434                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2435                             pinfo->metric);
2436         if (pinfo->filled & MPATH_INFO_EXPTIME)
2437                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2438                             pinfo->exptime);
2439         if (pinfo->filled & MPATH_INFO_FLAGS)
2440                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2441                             pinfo->flags);
2442         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2443                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2444                             pinfo->discovery_timeout);
2445         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2446                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2447                             pinfo->discovery_retries);
2448
2449         nla_nest_end(msg, pinfoattr);
2450
2451         return genlmsg_end(msg, hdr);
2452
2453  nla_put_failure:
2454         genlmsg_cancel(msg, hdr);
2455         return -EMSGSIZE;
2456 }
2457
2458 static int nl80211_dump_mpath(struct sk_buff *skb,
2459                               struct netlink_callback *cb)
2460 {
2461         struct mpath_info pinfo;
2462         struct cfg80211_registered_device *dev;
2463         struct net_device *netdev;
2464         u8 dst[ETH_ALEN];
2465         u8 next_hop[ETH_ALEN];
2466         int path_idx = cb->args[1];
2467         int err;
2468
2469         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2470         if (err)
2471                 return err;
2472
2473         if (!dev->ops->dump_mpath) {
2474                 err = -EOPNOTSUPP;
2475                 goto out_err;
2476         }
2477
2478         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2479                 err = -EOPNOTSUPP;
2480                 goto out_err;
2481         }
2482
2483         while (1) {
2484                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2485                                            dst, next_hop, &pinfo);
2486                 if (err == -ENOENT)
2487                         break;
2488                 if (err)
2489                         goto out_err;
2490
2491                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2492                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2493                                        netdev, dst, next_hop,
2494                                        &pinfo) < 0)
2495                         goto out;
2496
2497                 path_idx++;
2498         }
2499
2500
2501  out:
2502         cb->args[1] = path_idx;
2503         err = skb->len;
2504  out_err:
2505         nl80211_finish_netdev_dump(dev);
2506         return err;
2507 }
2508
2509 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2510 {
2511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2512         int err;
2513         struct net_device *dev = info->user_ptr[1];
2514         struct mpath_info pinfo;
2515         struct sk_buff *msg;
2516         u8 *dst = NULL;
2517         u8 next_hop[ETH_ALEN];
2518
2519         memset(&pinfo, 0, sizeof(pinfo));
2520
2521         if (!info->attrs[NL80211_ATTR_MAC])
2522                 return -EINVAL;
2523
2524         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2525
2526         if (!rdev->ops->get_mpath)
2527                 return -EOPNOTSUPP;
2528
2529         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2530                 return -EOPNOTSUPP;
2531
2532         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2533         if (err)
2534                 return err;
2535
2536         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2537         if (!msg)
2538                 return -ENOMEM;
2539
2540         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2541                                  dev, dst, next_hop, &pinfo) < 0) {
2542                 nlmsg_free(msg);
2543                 return -ENOBUFS;
2544         }
2545
2546         return genlmsg_reply(msg, info);
2547 }
2548
2549 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2550 {
2551         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2552         struct net_device *dev = info->user_ptr[1];
2553         u8 *dst = NULL;
2554         u8 *next_hop = NULL;
2555
2556         if (!info->attrs[NL80211_ATTR_MAC])
2557                 return -EINVAL;
2558
2559         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2560                 return -EINVAL;
2561
2562         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2563         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2564
2565         if (!rdev->ops->change_mpath)
2566                 return -EOPNOTSUPP;
2567
2568         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2569                 return -EOPNOTSUPP;
2570
2571         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2572 }
2573
2574 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2575 {
2576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2577         struct net_device *dev = info->user_ptr[1];
2578         u8 *dst = NULL;
2579         u8 *next_hop = NULL;
2580
2581         if (!info->attrs[NL80211_ATTR_MAC])
2582                 return -EINVAL;
2583
2584         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2585                 return -EINVAL;
2586
2587         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2588         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2589
2590         if (!rdev->ops->add_mpath)
2591                 return -EOPNOTSUPP;
2592
2593         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2594                 return -EOPNOTSUPP;
2595
2596         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2597 }
2598
2599 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2600 {
2601         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2602         struct net_device *dev = info->user_ptr[1];
2603         u8 *dst = NULL;
2604
2605         if (info->attrs[NL80211_ATTR_MAC])
2606                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2607
2608         if (!rdev->ops->del_mpath)
2609                 return -EOPNOTSUPP;
2610
2611         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2612 }
2613
2614 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2615 {
2616         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2617         struct net_device *dev = info->user_ptr[1];
2618         struct bss_parameters params;
2619
2620         memset(&params, 0, sizeof(params));
2621         /* default to not changing parameters */
2622         params.use_cts_prot = -1;
2623         params.use_short_preamble = -1;
2624         params.use_short_slot_time = -1;
2625         params.ap_isolate = -1;
2626         params.ht_opmode = -1;
2627
2628         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2629                 params.use_cts_prot =
2630                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2631         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2632                 params.use_short_preamble =
2633                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2634         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2635                 params.use_short_slot_time =
2636                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2637         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2638                 params.basic_rates =
2639                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2640                 params.basic_rates_len =
2641                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2642         }
2643         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2644                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2645         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2646                 params.ht_opmode =
2647                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2648
2649         if (!rdev->ops->change_bss)
2650                 return -EOPNOTSUPP;
2651
2652         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2653             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2654                 return -EOPNOTSUPP;
2655
2656         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2657 }
2658
2659 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2660         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2661         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2662         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2663         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2664         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2665         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2666 };
2667
2668 static int parse_reg_rule(struct nlattr *tb[],
2669         struct ieee80211_reg_rule *reg_rule)
2670 {
2671         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2672         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2673
2674         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2675                 return -EINVAL;
2676         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2677                 return -EINVAL;
2678         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2679                 return -EINVAL;
2680         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2681                 return -EINVAL;
2682         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2683                 return -EINVAL;
2684
2685         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2686
2687         freq_range->start_freq_khz =
2688                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2689         freq_range->end_freq_khz =
2690                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2691         freq_range->max_bandwidth_khz =
2692                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2693
2694         power_rule->max_eirp =
2695                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2696
2697         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2698                 power_rule->max_antenna_gain =
2699                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2700
2701         return 0;
2702 }
2703
2704 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2705 {
2706         int r;
2707         char *data = NULL;
2708
2709         /*
2710          * You should only get this when cfg80211 hasn't yet initialized
2711          * completely when built-in to the kernel right between the time
2712          * window between nl80211_init() and regulatory_init(), if that is
2713          * even possible.
2714          */
2715         mutex_lock(&cfg80211_mutex);
2716         if (unlikely(!cfg80211_regdomain)) {
2717                 mutex_unlock(&cfg80211_mutex);
2718                 return -EINPROGRESS;
2719         }
2720         mutex_unlock(&cfg80211_mutex);
2721
2722         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2723                 return -EINVAL;
2724
2725         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2726
2727         r = regulatory_hint_user(data);
2728
2729         return r;
2730 }
2731
2732 static int nl80211_get_mesh_config(struct sk_buff *skb,
2733                                    struct genl_info *info)
2734 {
2735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2736         struct net_device *dev = info->user_ptr[1];
2737         struct wireless_dev *wdev = dev->ieee80211_ptr;
2738         struct mesh_config cur_params;
2739         int err = 0;
2740         void *hdr;
2741         struct nlattr *pinfoattr;
2742         struct sk_buff *msg;
2743
2744         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2745                 return -EOPNOTSUPP;
2746
2747         if (!rdev->ops->get_mesh_config)
2748                 return -EOPNOTSUPP;
2749
2750         wdev_lock(wdev);
2751         /* If not connected, get default parameters */
2752         if (!wdev->mesh_id_len)
2753                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2754         else
2755                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
2756                                                  &cur_params);
2757         wdev_unlock(wdev);
2758
2759         if (err)
2760                 return err;
2761
2762         /* Draw up a netlink message to send back */
2763         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2764         if (!msg)
2765                 return -ENOMEM;
2766         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2767                              NL80211_CMD_GET_MESH_CONFIG);
2768         if (!hdr)
2769                 goto out;
2770         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
2771         if (!pinfoattr)
2772                 goto nla_put_failure;
2773         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2774         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2775                         cur_params.dot11MeshRetryTimeout);
2776         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2777                         cur_params.dot11MeshConfirmTimeout);
2778         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2779                         cur_params.dot11MeshHoldingTimeout);
2780         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2781                         cur_params.dot11MeshMaxPeerLinks);
2782         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2783                         cur_params.dot11MeshMaxRetries);
2784         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2785                         cur_params.dot11MeshTTL);
2786         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2787                         cur_params.element_ttl);
2788         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2789                         cur_params.auto_open_plinks);
2790         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2791                         cur_params.dot11MeshHWMPmaxPREQretries);
2792         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2793                         cur_params.path_refresh_time);
2794         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2795                         cur_params.min_discovery_timeout);
2796         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2797                         cur_params.dot11MeshHWMPactivePathTimeout);
2798         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2799                         cur_params.dot11MeshHWMPpreqMinInterval);
2800         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2801                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2802         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2803                         cur_params.dot11MeshHWMPRootMode);
2804         nla_nest_end(msg, pinfoattr);
2805         genlmsg_end(msg, hdr);
2806         return genlmsg_reply(msg, info);
2807
2808  nla_put_failure:
2809         genlmsg_cancel(msg, hdr);
2810  out:
2811         nlmsg_free(msg);
2812         return -ENOBUFS;
2813 }
2814
2815 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2816         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2817         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2818         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2819         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2820         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2821         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2822         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2823         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2824
2825         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2826         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2827         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2828         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2829         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2830         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2831 };
2832
2833 static const struct nla_policy
2834         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
2835         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
2836         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
2837         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
2838         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
2839                 .len = IEEE80211_MAX_DATA_LEN },
2840 };
2841
2842 static int nl80211_parse_mesh_config(struct genl_info *info,
2843                                      struct mesh_config *cfg,
2844                                      u32 *mask_out)
2845 {
2846         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2847         u32 mask = 0;
2848
2849 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2850 do {\
2851         if (table[attr_num]) {\
2852                 cfg->param = nla_fn(table[attr_num]); \
2853                 mask |= (1 << (attr_num - 1)); \
2854         } \
2855 } while (0);\
2856
2857
2858         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
2859                 return -EINVAL;
2860         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2861                              info->attrs[NL80211_ATTR_MESH_CONFIG],
2862                              nl80211_meshconf_params_policy))
2863                 return -EINVAL;
2864
2865         /* This makes sure that there aren't more than 32 mesh config
2866          * parameters (otherwise our bitfield scheme would not work.) */
2867         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2868
2869         /* Fill in the params struct */
2870         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2871                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2872         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2873                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2874         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2875                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2876         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2877                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2878         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2879                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2880         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2881                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2882         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
2883                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
2884         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2885                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2886         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2887                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2888                         nla_get_u8);
2889         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2890                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2891         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2892                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2893                         nla_get_u16);
2894         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2895                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2896                         nla_get_u32);
2897         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2898                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2899                         nla_get_u16);
2900         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2901                         dot11MeshHWMPnetDiameterTraversalTime,
2902                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2903                         nla_get_u16);
2904         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2905                         dot11MeshHWMPRootMode, mask,
2906                         NL80211_MESHCONF_HWMP_ROOTMODE,
2907                         nla_get_u8);
2908         if (mask_out)
2909                 *mask_out = mask;
2910
2911         return 0;
2912
2913 #undef FILL_IN_MESH_PARAM_IF_SET
2914 }
2915
2916 static int nl80211_parse_mesh_setup(struct genl_info *info,
2917                                      struct mesh_setup *setup)
2918 {
2919         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
2920
2921         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
2922                 return -EINVAL;
2923         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
2924                              info->attrs[NL80211_ATTR_MESH_SETUP],
2925                              nl80211_mesh_setup_params_policy))
2926                 return -EINVAL;
2927
2928         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
2929                 setup->path_sel_proto =
2930                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
2931                  IEEE80211_PATH_PROTOCOL_VENDOR :
2932                  IEEE80211_PATH_PROTOCOL_HWMP;
2933
2934         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
2935                 setup->path_metric =
2936                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
2937                  IEEE80211_PATH_METRIC_VENDOR :
2938                  IEEE80211_PATH_METRIC_AIRTIME;
2939
2940
2941         if (tb[NL80211_MESH_SETUP_IE]) {
2942                 struct nlattr *ieattr =
2943                         tb[NL80211_MESH_SETUP_IE];
2944                 if (!is_valid_ie_attr(ieattr))
2945                         return -EINVAL;
2946                 setup->ie = nla_data(ieattr);
2947                 setup->ie_len = nla_len(ieattr);
2948         }
2949         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
2950
2951         return 0;
2952 }
2953
2954 static int nl80211_update_mesh_config(struct sk_buff *skb,
2955                                       struct genl_info *info)
2956 {
2957         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2958         struct net_device *dev = info->user_ptr[1];
2959         struct wireless_dev *wdev = dev->ieee80211_ptr;
2960         struct mesh_config cfg;
2961         u32 mask;
2962         int err;
2963
2964         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2965                 return -EOPNOTSUPP;
2966
2967         if (!rdev->ops->update_mesh_config)
2968                 return -EOPNOTSUPP;
2969
2970         err = nl80211_parse_mesh_config(info, &cfg, &mask);
2971         if (err)
2972                 return err;
2973
2974         wdev_lock(wdev);
2975         if (!wdev->mesh_id_len)
2976                 err = -ENOLINK;
2977
2978         if (!err)
2979                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
2980                                                     mask, &cfg);
2981
2982         wdev_unlock(wdev);
2983
2984         return err;
2985 }
2986
2987 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2988 {
2989         struct sk_buff *msg;
2990         void *hdr = NULL;
2991         struct nlattr *nl_reg_rules;
2992         unsigned int i;
2993         int err = -EINVAL;
2994
2995         mutex_lock(&cfg80211_mutex);
2996
2997         if (!cfg80211_regdomain)
2998                 goto out;
2999
3000         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3001         if (!msg) {
3002                 err = -ENOBUFS;
3003                 goto out;
3004         }
3005
3006         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3007                              NL80211_CMD_GET_REG);
3008         if (!hdr)
3009                 goto put_failure;
3010
3011         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3012                 cfg80211_regdomain->alpha2);
3013
3014         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3015         if (!nl_reg_rules)
3016                 goto nla_put_failure;
3017
3018         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3019                 struct nlattr *nl_reg_rule;
3020                 const struct ieee80211_reg_rule *reg_rule;
3021                 const struct ieee80211_freq_range *freq_range;
3022                 const struct ieee80211_power_rule *power_rule;
3023
3024                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3025                 freq_range = &reg_rule->freq_range;
3026                 power_rule = &reg_rule->power_rule;
3027
3028                 nl_reg_rule = nla_nest_start(msg, i);
3029                 if (!nl_reg_rule)
3030                         goto nla_put_failure;
3031
3032                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3033                         reg_rule->flags);
3034                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3035                         freq_range->start_freq_khz);
3036                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3037                         freq_range->end_freq_khz);
3038                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3039                         freq_range->max_bandwidth_khz);
3040                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3041                         power_rule->max_antenna_gain);
3042                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3043                         power_rule->max_eirp);
3044
3045                 nla_nest_end(msg, nl_reg_rule);
3046         }
3047
3048         nla_nest_end(msg, nl_reg_rules);
3049
3050         genlmsg_end(msg, hdr);
3051         err = genlmsg_reply(msg, info);
3052         goto out;
3053
3054 nla_put_failure:
3055         genlmsg_cancel(msg, hdr);
3056 put_failure:
3057         nlmsg_free(msg);
3058         err = -EMSGSIZE;
3059 out:
3060         mutex_unlock(&cfg80211_mutex);
3061         return err;
3062 }
3063
3064 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3065 {
3066         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3067         struct nlattr *nl_reg_rule;
3068         char *alpha2 = NULL;
3069         int rem_reg_rules = 0, r = 0;
3070         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3071         struct ieee80211_regdomain *rd = NULL;
3072
3073         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3074                 return -EINVAL;
3075
3076         if (!info->attrs[NL80211_ATTR_REG_RULES])
3077                 return -EINVAL;
3078
3079         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3080
3081         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3082                         rem_reg_rules) {
3083                 num_rules++;
3084                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3085                         return -EINVAL;
3086         }
3087
3088         mutex_lock(&cfg80211_mutex);
3089
3090         if (!reg_is_valid_request(alpha2)) {
3091                 r = -EINVAL;
3092                 goto bad_reg;
3093         }
3094
3095         size_of_regd = sizeof(struct ieee80211_regdomain) +
3096                 (num_rules * sizeof(struct ieee80211_reg_rule));
3097
3098         rd = kzalloc(size_of_regd, GFP_KERNEL);
3099         if (!rd) {
3100                 r = -ENOMEM;
3101                 goto bad_reg;
3102         }
3103
3104         rd->n_reg_rules = num_rules;
3105         rd->alpha2[0] = alpha2[0];
3106         rd->alpha2[1] = alpha2[1];
3107
3108         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3109                         rem_reg_rules) {
3110                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3111                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3112                         reg_rule_policy);
3113                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3114                 if (r)
3115                         goto bad_reg;
3116
3117                 rule_idx++;
3118
3119                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3120                         r = -EINVAL;
3121                         goto bad_reg;
3122                 }
3123         }
3124
3125         BUG_ON(rule_idx != num_rules);
3126
3127         r = set_regdom(rd);
3128
3129         mutex_unlock(&cfg80211_mutex);
3130
3131         return r;
3132
3133  bad_reg:
3134         mutex_unlock(&cfg80211_mutex);
3135         kfree(rd);
3136         return r;
3137 }
3138
3139 static int validate_scan_freqs(struct nlattr *freqs)
3140 {
3141         struct nlattr *attr1, *attr2;
3142         int n_channels = 0, tmp1, tmp2;
3143
3144         nla_for_each_nested(attr1, freqs, tmp1) {
3145                 n_channels++;
3146                 /*
3147                  * Some hardware has a limited channel list for
3148                  * scanning, and it is pretty much nonsensical
3149                  * to scan for a channel twice, so disallow that
3150                  * and don't require drivers to check that the
3151                  * channel list they get isn't longer than what
3152                  * they can scan, as long as they can scan all
3153                  * the channels they registered at once.
3154                  */
3155                 nla_for_each_nested(attr2, freqs, tmp2)
3156                         if (attr1 != attr2 &&
3157                             nla_get_u32(attr1) == nla_get_u32(attr2))
3158                                 return 0;
3159         }
3160
3161         return n_channels;
3162 }
3163
3164 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3165 {
3166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3167         struct net_device *dev = info->user_ptr[1];
3168         struct cfg80211_scan_request *request;
3169         struct cfg80211_ssid *ssid;
3170         struct ieee80211_channel *channel;
3171         struct nlattr *attr;
3172         struct wiphy *wiphy;
3173         int err, tmp, n_ssids = 0, n_channels, i;
3174         enum ieee80211_band band;
3175         size_t ie_len;
3176
3177         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3178                 return -EINVAL;
3179
3180         wiphy = &rdev->wiphy;
3181
3182         if (!rdev->ops->scan)
3183                 return -EOPNOTSUPP;
3184
3185         if (rdev->scan_req)
3186                 return -EBUSY;
3187
3188         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3189                 n_channels = validate_scan_freqs(
3190                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3191                 if (!n_channels)
3192                         return -EINVAL;
3193         } else {
3194                 n_channels = 0;
3195
3196                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3197                         if (wiphy->bands[band])
3198                                 n_channels += wiphy->bands[band]->n_channels;
3199         }
3200
3201         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3202                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3203                         n_ssids++;
3204
3205         if (n_ssids > wiphy->max_scan_ssids)
3206                 return -EINVAL;
3207
3208         if (info->attrs[NL80211_ATTR_IE])
3209                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3210         else
3211                 ie_len = 0;
3212
3213         if (ie_len > wiphy->max_scan_ie_len)
3214                 return -EINVAL;
3215
3216         request = kzalloc(sizeof(*request)
3217                         + sizeof(*ssid) * n_ssids
3218                         + sizeof(channel) * n_channels
3219                         + ie_len, GFP_KERNEL);
3220         if (!request)
3221                 return -ENOMEM;
3222
3223         if (n_ssids)
3224                 request->ssids = (void *)&request->channels[n_channels];
3225         request->n_ssids = n_ssids;
3226         if (ie_len) {
3227                 if (request->ssids)
3228                         request->ie = (void *)(request->ssids + n_ssids);
3229                 else
3230                         request->ie = (void *)(request->channels + n_channels);
3231         }
3232
3233         i = 0;
3234         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3235                 /* user specified, bail out if channel not found */
3236                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3237                         struct ieee80211_channel *chan;
3238
3239                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3240
3241                         if (!chan) {
3242                                 err = -EINVAL;
3243                                 goto out_free;
3244                         }
3245
3246                         /* ignore disabled channels */
3247                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3248                                 continue;
3249
3250                         request->channels[i] = chan;
3251                         i++;
3252                 }
3253         } else {
3254                 /* all channels */
3255                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3256                         int j;
3257                         if (!wiphy->bands[band])
3258                                 continue;
3259                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3260                                 struct ieee80211_channel *chan;
3261
3262                                 chan = &wiphy->bands[band]->channels[j];
3263
3264                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3265                                         continue;
3266
3267                                 request->channels[i] = chan;
3268                                 i++;
3269                         }
3270                 }
3271         }
3272
3273         if (!i) {
3274                 err = -EINVAL;
3275                 goto out_free;
3276         }
3277
3278         request->n_channels = i;
3279
3280         i = 0;
3281         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3282                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3283                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3284                                 err = -EINVAL;
3285                                 goto out_free;
3286                         }
3287                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3288                         request->ssids[i].ssid_len = nla_len(attr);
3289                         i++;
3290                 }
3291         }
3292
3293         if (info->attrs[NL80211_ATTR_IE]) {
3294                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3295                 memcpy((void *)request->ie,
3296                        nla_data(info->attrs[NL80211_ATTR_IE]),
3297                        request->ie_len);
3298         }
3299
3300         request->dev = dev;
3301         request->wiphy = &rdev->wiphy;
3302
3303         rdev->scan_req = request;
3304         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3305
3306         if (!err) {
3307                 nl80211_send_scan_start(rdev, dev);
3308                 dev_hold(dev);
3309         } else {
3310  out_free:
3311                 rdev->scan_req = NULL;
3312                 kfree(request);
3313         }
3314
3315         return err;
3316 }
3317
3318 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3319                             struct cfg80211_registered_device *rdev,
3320                             struct wireless_dev *wdev,
3321                             struct cfg80211_internal_bss *intbss)
3322 {
3323         struct cfg80211_bss *res = &intbss->pub;
3324         void *hdr;
3325         struct nlattr *bss;
3326         int i;
3327
3328         ASSERT_WDEV_LOCK(wdev);
3329
3330         hdr = nl80211hdr_put(msg, pid, seq, flags,
3331                              NL80211_CMD_NEW_SCAN_RESULTS);
3332         if (!hdr)
3333                 return -1;
3334
3335         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3336         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3337
3338         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3339         if (!bss)
3340                 goto nla_put_failure;
3341         if (!is_zero_ether_addr(res->bssid))
3342                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3343         if (res->information_elements && res->len_information_elements)
3344                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3345                         res->len_information_elements,
3346                         res->information_elements);
3347         if (res->beacon_ies && res->len_beacon_ies &&
3348             res->beacon_ies != res->information_elements)
3349                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3350                         res->len_beacon_ies, res->beacon_ies);
3351         if (res->tsf)
3352                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3353         if (res->beacon_interval)
3354                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3355         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3356         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3357         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3358                 jiffies_to_msecs(jiffies - intbss->ts));
3359
3360         switch (rdev->wiphy.signal_type) {
3361         case CFG80211_SIGNAL_TYPE_MBM:
3362                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3363                 break;
3364         case CFG80211_SIGNAL_TYPE_UNSPEC:
3365                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3366                 break;
3367         default:
3368                 break;
3369         }
3370
3371         switch (wdev->iftype) {
3372         case NL80211_IFTYPE_P2P_CLIENT:
3373         case NL80211_IFTYPE_STATION:
3374                 if (intbss == wdev->current_bss)
3375                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3376                                     NL80211_BSS_STATUS_ASSOCIATED);
3377                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3378                         if (intbss != wdev->auth_bsses[i])
3379                                 continue;
3380                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3381                                     NL80211_BSS_STATUS_AUTHENTICATED);
3382                         break;
3383                 }
3384                 break;
3385         case NL80211_IFTYPE_ADHOC:
3386                 if (intbss == wdev->current_bss)
3387                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3388                                     NL80211_BSS_STATUS_IBSS_JOINED);
3389                 break;
3390         default:
3391                 break;
3392         }
3393
3394         nla_nest_end(msg, bss);
3395
3396         return genlmsg_end(msg, hdr);
3397
3398  nla_put_failure:
3399         genlmsg_cancel(msg, hdr);
3400         return -EMSGSIZE;
3401 }
3402
3403 static int nl80211_dump_scan(struct sk_buff *skb,
3404                              struct netlink_callback *cb)
3405 {
3406         struct cfg80211_registered_device *rdev;
3407         struct net_device *dev;
3408         struct cfg80211_internal_bss *scan;
3409         struct wireless_dev *wdev;
3410         int start = cb->args[1], idx = 0;
3411         int err;
3412
3413         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3414         if (err)
3415                 return err;
3416
3417         wdev = dev->ieee80211_ptr;
3418
3419         wdev_lock(wdev);
3420         spin_lock_bh(&rdev->bss_lock);
3421         cfg80211_bss_expire(rdev);
3422
3423         list_for_each_entry(scan, &rdev->bss_list, list) {
3424                 if (++idx <= start)
3425                         continue;
3426                 if (nl80211_send_bss(skb,
3427                                 NETLINK_CB(cb->skb).pid,
3428                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3429                                 rdev, wdev, scan) < 0) {
3430                         idx--;
3431                         break;
3432                 }
3433         }
3434
3435         spin_unlock_bh(&rdev->bss_lock);
3436         wdev_unlock(wdev);
3437
3438         cb->args[1] = idx;
3439         nl80211_finish_netdev_dump(rdev);
3440
3441         return skb->len;
3442 }
3443
3444 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3445                                 int flags, struct net_device *dev,
3446                                 struct survey_info *survey)
3447 {
3448         void *hdr;
3449         struct nlattr *infoattr;
3450
3451         /* Survey without a channel doesn't make sense */
3452         if (!survey->channel)
3453                 return -EINVAL;
3454
3455         hdr = nl80211hdr_put(msg, pid, seq, flags,
3456                              NL80211_CMD_NEW_SURVEY_RESULTS);
3457         if (!hdr)
3458                 return -ENOMEM;
3459
3460         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3461
3462         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3463         if (!infoattr)
3464                 goto nla_put_failure;
3465
3466         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3467                     survey->channel->center_freq);
3468         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3469                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3470                             survey->noise);
3471         if (survey->filled & SURVEY_INFO_IN_USE)
3472                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3473         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3474                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3475                             survey->channel_time);
3476         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3477                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3478                             survey->channel_time_busy);
3479         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3480                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3481                             survey->channel_time_ext_busy);
3482         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3483                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3484                             survey->channel_time_rx);
3485         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3486                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3487                             survey->channel_time_tx);
3488
3489         nla_nest_end(msg, infoattr);
3490
3491         return genlmsg_end(msg, hdr);
3492
3493  nla_put_failure:
3494         genlmsg_cancel(msg, hdr);
3495         return -EMSGSIZE;
3496 }
3497
3498 static int nl80211_dump_survey(struct sk_buff *skb,
3499                         struct netlink_callback *cb)
3500 {
3501         struct survey_info survey;
3502         struct cfg80211_registered_device *dev;
3503         struct net_device *netdev;
3504         int survey_idx = cb->args[1];
3505         int res;
3506
3507         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3508         if (res)
3509                 return res;
3510
3511         if (!dev->ops->dump_survey) {
3512                 res = -EOPNOTSUPP;
3513                 goto out_err;
3514         }
3515
3516         while (1) {
3517                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3518                                             &survey);
3519                 if (res == -ENOENT)
3520                         break;
3521                 if (res)
3522                         goto out_err;
3523
3524                 if (nl80211_send_survey(skb,
3525                                 NETLINK_CB(cb->skb).pid,
3526                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3527                                 netdev,
3528                                 &survey) < 0)
3529                         goto out;
3530                 survey_idx++;
3531         }
3532
3533  out:
3534         cb->args[1] = survey_idx;
3535         res = skb->len;
3536  out_err:
3537         nl80211_finish_netdev_dump(dev);
3538         return res;
3539 }
3540
3541 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3542 {
3543         return auth_type <= NL80211_AUTHTYPE_MAX;
3544 }
3545
3546 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3547 {
3548         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3549                                   NL80211_WPA_VERSION_2));
3550 }
3551
3552 static bool nl80211_valid_akm_suite(u32 akm)
3553 {
3554         return akm == WLAN_AKM_SUITE_8021X ||
3555                 akm == WLAN_AKM_SUITE_PSK;
3556 }
3557
3558 static bool nl80211_valid_cipher_suite(u32 cipher)
3559 {
3560         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3561                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3562                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3563                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3564                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3565 }
3566
3567
3568 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3569 {
3570         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3571         struct net_device *dev = info->user_ptr[1];
3572         struct ieee80211_channel *chan;
3573         const u8 *bssid, *ssid, *ie = NULL;
3574         int err, ssid_len, ie_len = 0;
3575         enum nl80211_auth_type auth_type;
3576         struct key_parse key;
3577         bool local_state_change;
3578
3579         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3580                 return -EINVAL;
3581
3582         if (!info->attrs[NL80211_ATTR_MAC])
3583                 return -EINVAL;
3584
3585         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3586                 return -EINVAL;
3587
3588         if (!info->attrs[NL80211_ATTR_SSID])
3589                 return -EINVAL;
3590
3591         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3592                 return -EINVAL;
3593
3594         err = nl80211_parse_key(info, &key);
3595         if (err)
3596                 return err;
3597
3598         if (key.idx >= 0) {
3599                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3600                         return -EINVAL;
3601                 if (!key.p.key || !key.p.key_len)
3602                         return -EINVAL;
3603                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3604                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3605                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3606                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3607                         return -EINVAL;
3608                 if (key.idx > 4)
3609                         return -EINVAL;
3610         } else {
3611                 key.p.key_len = 0;
3612                 key.p.key = NULL;
3613         }
3614
3615         if (key.idx >= 0) {
3616                 int i;
3617                 bool ok = false;
3618                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3619                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3620                                 ok = true;
3621                                 break;
3622                         }
3623                 }
3624                 if (!ok)
3625                         return -EINVAL;
3626         }
3627
3628         if (!rdev->ops->auth)
3629                 return -EOPNOTSUPP;
3630
3631         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3632             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3633                 return -EOPNOTSUPP;
3634
3635         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3636         chan = ieee80211_get_channel(&rdev->wiphy,
3637                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3638         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3639                 return -EINVAL;
3640
3641         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3642         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3643
3644         if (info->attrs[NL80211_ATTR_IE]) {
3645                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3646                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3647         }
3648
3649         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3650         if (!nl80211_valid_auth_type(auth_type))
3651                 return -EINVAL;
3652
3653         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3654
3655         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3656                                   ssid, ssid_len, ie, ie_len,
3657                                   key.p.key, key.p.key_len, key.idx,
3658                                   local_state_change);
3659 }
3660
3661 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3662                                    struct genl_info *info,
3663                                    struct cfg80211_crypto_settings *settings,
3664                                    int cipher_limit)
3665 {
3666         memset(settings, 0, sizeof(*settings));
3667
3668         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3669
3670         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3671                 u16 proto;
3672                 proto = nla_get_u16(
3673                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3674                 settings->control_port_ethertype = cpu_to_be16(proto);
3675                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3676                     proto != ETH_P_PAE)
3677                         return -EINVAL;
3678                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3679                         settings->control_port_no_encrypt = true;
3680         } else
3681                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3682
3683         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3684                 void *data;
3685                 int len, i;
3686
3687                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3688                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3689                 settings->n_ciphers_pairwise = len / sizeof(u32);
3690
3691                 if (len % sizeof(u32))
3692                         return -EINVAL;
3693
3694                 if (settings->n_ciphers_pairwise > cipher_limit)
3695                         return -EINVAL;
3696
3697                 memcpy(settings->ciphers_pairwise, data, len);
3698
3699                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3700                         if (!nl80211_valid_cipher_suite(
3701                                         settings->ciphers_pairwise[i]))
3702                                 return -EINVAL;
3703         }
3704
3705         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3706                 settings->cipher_group =
3707                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3708                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3709                         return -EINVAL;
3710         }
3711
3712         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3713                 settings->wpa_versions =
3714                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3715                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3716                         return -EINVAL;
3717         }
3718
3719         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3720                 void *data;
3721                 int len, i;
3722
3723                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3724                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3725                 settings->n_akm_suites = len / sizeof(u32);
3726
3727                 if (len % sizeof(u32))
3728                         return -EINVAL;
3729
3730                 memcpy(settings->akm_suites, data, len);
3731
3732                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3733                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3734                                 return -EINVAL;
3735         }
3736
3737         return 0;
3738 }
3739
3740 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3741 {
3742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3743         struct net_device *dev = info->user_ptr[1];
3744         struct cfg80211_crypto_settings crypto;
3745         struct ieee80211_channel *chan;
3746         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3747         int err, ssid_len, ie_len = 0;
3748         bool use_mfp = false;
3749
3750         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3751                 return -EINVAL;
3752
3753         if (!info->attrs[NL80211_ATTR_MAC] ||
3754             !info->attrs[NL80211_ATTR_SSID] ||
3755             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3756                 return -EINVAL;
3757
3758         if (!rdev->ops->assoc)
3759                 return -EOPNOTSUPP;
3760
3761         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3762             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3763                 return -EOPNOTSUPP;
3764
3765         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3766
3767         chan = ieee80211_get_channel(&rdev->wiphy,
3768                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3769         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3770                 return -EINVAL;
3771
3772         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3773         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3774
3775         if (info->attrs[NL80211_ATTR_IE]) {
3776                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3777                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3778         }
3779
3780         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3781                 enum nl80211_mfp mfp =
3782                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3783                 if (mfp == NL80211_MFP_REQUIRED)
3784                         use_mfp = true;
3785                 else if (mfp != NL80211_MFP_NO)
3786                         return -EINVAL;
3787         }
3788
3789         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3790                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3791
3792         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3793         if (!err)
3794                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3795                                           ssid, ssid_len, ie, ie_len, use_mfp,
3796                                           &crypto);
3797
3798         return err;
3799 }
3800
3801 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3802 {
3803         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3804         struct net_device *dev = info->user_ptr[1];
3805         const u8 *ie = NULL, *bssid;
3806         int ie_len = 0;
3807         u16 reason_code;
3808         bool local_state_change;
3809
3810         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3811                 return -EINVAL;
3812
3813         if (!info->attrs[NL80211_ATTR_MAC])
3814                 return -EINVAL;
3815
3816         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3817                 return -EINVAL;
3818
3819         if (!rdev->ops->deauth)
3820                 return -EOPNOTSUPP;
3821
3822         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3823             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3824                 return -EOPNOTSUPP;
3825
3826         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3827
3828         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3829         if (reason_code == 0) {
3830                 /* Reason Code 0 is reserved */
3831                 return -EINVAL;
3832         }
3833
3834         if (info->attrs[NL80211_ATTR_IE]) {
3835                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3836                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3837         }
3838
3839         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3840
3841         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3842                                     local_state_change);
3843 }
3844
3845 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3846 {
3847         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3848         struct net_device *dev = info->user_ptr[1];
3849         const u8 *ie = NULL, *bssid;
3850         int ie_len = 0;
3851         u16 reason_code;
3852         bool local_state_change;
3853
3854         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3855                 return -EINVAL;
3856
3857         if (!info->attrs[NL80211_ATTR_MAC])
3858                 return -EINVAL;
3859
3860         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3861                 return -EINVAL;
3862
3863         if (!rdev->ops->disassoc)
3864                 return -EOPNOTSUPP;
3865
3866         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3867             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3868                 return -EOPNOTSUPP;
3869
3870         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3871
3872         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3873         if (reason_code == 0) {
3874                 /* Reason Code 0 is reserved */
3875                 return -EINVAL;
3876         }
3877
3878         if (info->attrs[NL80211_ATTR_IE]) {
3879                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3880                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3881         }
3882
3883         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3884
3885         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3886                                       local_state_change);
3887 }
3888
3889 static bool
3890 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
3891                          int mcast_rate[IEEE80211_NUM_BANDS],
3892                          int rateval)
3893 {
3894         struct wiphy *wiphy = &rdev->wiphy;
3895         bool found = false;
3896         int band, i;
3897
3898         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3899                 struct ieee80211_supported_band *sband;
3900
3901                 sband = wiphy->bands[band];
3902                 if (!sband)
3903                         continue;
3904
3905                 for (i = 0; i < sband->n_bitrates; i++) {
3906                         if (sband->bitrates[i].bitrate == rateval) {
3907                                 mcast_rate[band] = i + 1;
3908                                 found = true;
3909                                 break;
3910                         }
3911                 }
3912         }
3913
3914         return found;
3915 }
3916
3917 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3918 {
3919         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3920         struct net_device *dev = info->user_ptr[1];
3921         struct cfg80211_ibss_params ibss;
3922         struct wiphy *wiphy;
3923         struct cfg80211_cached_keys *connkeys = NULL;
3924         int err;
3925
3926         memset(&ibss, 0, sizeof(ibss));
3927
3928         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3929                 return -EINVAL;
3930
3931         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3932             !info->attrs[NL80211_ATTR_SSID] ||
3933             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3934                 return -EINVAL;
3935
3936         ibss.beacon_interval = 100;
3937
3938         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3939                 ibss.beacon_interval =
3940                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3941                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3942                         return -EINVAL;
3943         }
3944
3945         if (!rdev->ops->join_ibss)
3946                 return -EOPNOTSUPP;
3947
3948         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3949                 return -EOPNOTSUPP;
3950
3951         wiphy = &rdev->wiphy;
3952
3953         if (info->attrs[NL80211_ATTR_MAC])
3954                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3955         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3956         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3957
3958         if (info->attrs[NL80211_ATTR_IE]) {
3959                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3960                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3961         }
3962
3963         ibss.channel = ieee80211_get_channel(wiphy,
3964                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3965         if (!ibss.channel ||
3966             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3967             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3968                 return -EINVAL;
3969
3970         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3971         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3972
3973         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3974                 u8 *rates =
3975                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3976                 int n_rates =
3977                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3978                 struct ieee80211_supported_band *sband =
3979                         wiphy->bands[ibss.channel->band];
3980                 int i, j;
3981
3982                 if (n_rates == 0)
3983                         return -EINVAL;
3984
3985                 for (i = 0; i < n_rates; i++) {
3986                         int rate = (rates[i] & 0x7f) * 5;
3987                         bool found = false;
3988
3989                         for (j = 0; j < sband->n_bitrates; j++) {
3990                                 if (sband->bitrates[j].bitrate == rate) {
3991                                         found = true;
3992                                         ibss.basic_rates |= BIT(j);
3993                                         break;
3994                                 }
3995                         }
3996                         if (!found)
3997                                 return -EINVAL;
3998                 }
3999         }
4000
4001         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4002             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4003                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4004                 return -EINVAL;
4005
4006         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4007                 connkeys = nl80211_parse_connkeys(rdev,
4008                                         info->attrs[NL80211_ATTR_KEYS]);
4009                 if (IS_ERR(connkeys))
4010                         return PTR_ERR(connkeys);
4011         }
4012
4013         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4014         if (err)
4015                 kfree(connkeys);
4016         return err;
4017 }
4018
4019 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4020 {
4021         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4022         struct net_device *dev = info->user_ptr[1];
4023
4024         if (!rdev->ops->leave_ibss)
4025                 return -EOPNOTSUPP;
4026
4027         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4028                 return -EOPNOTSUPP;
4029
4030         return cfg80211_leave_ibss(rdev, dev, false);
4031 }
4032
4033 #ifdef CONFIG_NL80211_TESTMODE
4034 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4035         .name = "testmode",
4036 };
4037
4038 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4039 {
4040         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4041         int err;
4042
4043         if (!info->attrs[NL80211_ATTR_TESTDATA])
4044                 return -EINVAL;
4045
4046         err = -EOPNOTSUPP;
4047         if (rdev->ops->testmode_cmd) {
4048                 rdev->testmode_info = info;
4049                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4050                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4051                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4052                 rdev->testmode_info = NULL;
4053         }
4054
4055         return err;
4056 }
4057
4058 static struct sk_buff *
4059 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4060                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4061 {
4062         struct sk_buff *skb;
4063         void *hdr;
4064         struct nlattr *data;
4065
4066         skb = nlmsg_new(approxlen + 100, gfp);
4067         if (!skb)
4068                 return NULL;
4069
4070         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4071         if (!hdr) {
4072                 kfree_skb(skb);
4073                 return NULL;
4074         }
4075
4076         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4077         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4078
4079         ((void **)skb->cb)[0] = rdev;
4080         ((void **)skb->cb)[1] = hdr;
4081         ((void **)skb->cb)[2] = data;
4082
4083         return skb;
4084
4085  nla_put_failure:
4086         kfree_skb(skb);
4087         return NULL;
4088 }
4089
4090 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4091                                                   int approxlen)
4092 {
4093         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4094
4095         if (WARN_ON(!rdev->testmode_info))
4096                 return NULL;
4097
4098         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4099                                 rdev->testmode_info->snd_pid,
4100                                 rdev->testmode_info->snd_seq,
4101                                 GFP_KERNEL);
4102 }
4103 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4104
4105 int cfg80211_testmode_reply(struct sk_buff *skb)
4106 {
4107         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4108         void *hdr = ((void **)skb->cb)[1];
4109         struct nlattr *data = ((void **)skb->cb)[2];
4110
4111         if (WARN_ON(!rdev->testmode_info)) {
4112                 kfree_skb(skb);
4113                 return -EINVAL;
4114         }
4115
4116         nla_nest_end(skb, data);
4117         genlmsg_end(skb, hdr);
4118         return genlmsg_reply(skb, rdev->testmode_info);
4119 }
4120 EXPORT_SYMBOL(cfg80211_testmode_reply);
4121
4122 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4123                                                   int approxlen, gfp_t gfp)
4124 {
4125         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4126
4127         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4128 }
4129 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4130
4131 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4132 {
4133         void *hdr = ((void **)skb->cb)[1];
4134         struct nlattr *data = ((void **)skb->cb)[2];
4135
4136         nla_nest_end(skb, data);
4137         genlmsg_end(skb, hdr);
4138         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4139 }
4140 EXPORT_SYMBOL(cfg80211_testmode_event);
4141 #endif
4142
4143 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4144 {
4145         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4146         struct net_device *dev = info->user_ptr[1];
4147         struct cfg80211_connect_params connect;
4148         struct wiphy *wiphy;
4149         struct cfg80211_cached_keys *connkeys = NULL;
4150         int err;
4151
4152         memset(&connect, 0, sizeof(connect));
4153
4154         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4155                 return -EINVAL;
4156
4157         if (!info->attrs[NL80211_ATTR_SSID] ||
4158             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4159                 return -EINVAL;
4160
4161         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4162                 connect.auth_type =
4163                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4164                 if (!nl80211_valid_auth_type(connect.auth_type))
4165                         return -EINVAL;
4166         } else
4167                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4168
4169         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4170
4171         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4172                                       NL80211_MAX_NR_CIPHER_SUITES);
4173         if (err)
4174                 return err;
4175
4176         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4177             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4178                 return -EOPNOTSUPP;
4179
4180         wiphy = &rdev->wiphy;
4181
4182         if (info->attrs[NL80211_ATTR_MAC])
4183                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4184         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4185         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4186
4187         if (info->attrs[NL80211_ATTR_IE]) {
4188                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4189                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4190         }
4191
4192         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4193                 connect.channel =
4194                         ieee80211_get_channel(wiphy,
4195                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4196                 if (!connect.channel ||
4197                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4198                         return -EINVAL;
4199         }
4200
4201         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4202                 connkeys = nl80211_parse_connkeys(rdev,
4203                                         info->attrs[NL80211_ATTR_KEYS]);
4204                 if (IS_ERR(connkeys))
4205                         return PTR_ERR(connkeys);
4206         }
4207
4208         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4209         if (err)
4210                 kfree(connkeys);
4211         return err;
4212 }
4213
4214 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4215 {
4216         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4217         struct net_device *dev = info->user_ptr[1];
4218         u16 reason;
4219
4220         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4221                 reason = WLAN_REASON_DEAUTH_LEAVING;
4222         else
4223                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4224
4225         if (reason == 0)
4226                 return -EINVAL;
4227
4228         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4229             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4230                 return -EOPNOTSUPP;
4231
4232         return cfg80211_disconnect(rdev, dev, reason, true);
4233 }
4234
4235 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4236 {
4237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4238         struct net *net;
4239         int err;
4240         u32 pid;
4241
4242         if (!info->attrs[NL80211_ATTR_PID])
4243                 return -EINVAL;
4244
4245         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4246
4247         net = get_net_ns_by_pid(pid);
4248         if (IS_ERR(net))
4249                 return PTR_ERR(net);
4250
4251         err = 0;
4252
4253         /* check if anything to do */
4254         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4255                 err = cfg80211_switch_netns(rdev, net);
4256
4257         put_net(net);
4258         return err;
4259 }
4260
4261 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4262 {
4263         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4264         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4265                         struct cfg80211_pmksa *pmksa) = NULL;
4266         struct net_device *dev = info->user_ptr[1];
4267         struct cfg80211_pmksa pmksa;
4268
4269         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4270
4271         if (!info->attrs[NL80211_ATTR_MAC])
4272                 return -EINVAL;
4273
4274         if (!info->attrs[NL80211_ATTR_PMKID])
4275                 return -EINVAL;
4276
4277         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4278         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4279
4280         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4281             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4282                 return -EOPNOTSUPP;
4283
4284         switch (info->genlhdr->cmd) {
4285         case NL80211_CMD_SET_PMKSA:
4286                 rdev_ops = rdev->ops->set_pmksa;
4287                 break;
4288         case NL80211_CMD_DEL_PMKSA:
4289                 rdev_ops = rdev->ops->del_pmksa;
4290                 break;
4291         default:
4292                 WARN_ON(1);
4293                 break;
4294         }
4295
4296         if (!rdev_ops)
4297                 return -EOPNOTSUPP;
4298
4299         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4300 }
4301
4302 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4303 {
4304         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4305         struct net_device *dev = info->user_ptr[1];
4306
4307         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4308             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4309                 return -EOPNOTSUPP;
4310
4311         if (!rdev->ops->flush_pmksa)
4312                 return -EOPNOTSUPP;
4313
4314         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4315 }
4316
4317 static int nl80211_remain_on_channel(struct sk_buff *skb,
4318                                      struct genl_info *info)
4319 {
4320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4321         struct net_device *dev = info->user_ptr[1];
4322         struct ieee80211_channel *chan;
4323         struct sk_buff *msg;
4324         void *hdr;
4325         u64 cookie;
4326         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4327         u32 freq, duration;
4328         int err;
4329
4330         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4331             !info->attrs[NL80211_ATTR_DURATION])
4332                 return -EINVAL;
4333
4334         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4335
4336         /*
4337          * We should be on that channel for at least one jiffie,
4338          * and more than 5 seconds seems excessive.
4339          */
4340         if (!duration || !msecs_to_jiffies(duration) ||
4341             duration > rdev->wiphy.max_remain_on_channel_duration)
4342                 return -EINVAL;
4343
4344         if (!rdev->ops->remain_on_channel)
4345                 return -EOPNOTSUPP;
4346
4347         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4348                 channel_type = nla_get_u32(
4349                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4350                 if (channel_type != NL80211_CHAN_NO_HT &&
4351                     channel_type != NL80211_CHAN_HT20 &&
4352                     channel_type != NL80211_CHAN_HT40PLUS &&
4353                     channel_type != NL80211_CHAN_HT40MINUS)
4354                         return -EINVAL;
4355         }
4356
4357         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4358         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4359         if (chan == NULL)
4360                 return -EINVAL;
4361
4362         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4363         if (!msg)
4364                 return -ENOMEM;
4365
4366         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4367                              NL80211_CMD_REMAIN_ON_CHANNEL);
4368
4369         if (IS_ERR(hdr)) {
4370                 err = PTR_ERR(hdr);
4371                 goto free_msg;
4372         }
4373
4374         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4375                                            channel_type, duration, &cookie);
4376
4377         if (err)
4378                 goto free_msg;
4379
4380         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4381
4382         genlmsg_end(msg, hdr);
4383
4384         return genlmsg_reply(msg, info);
4385
4386  nla_put_failure:
4387         err = -ENOBUFS;
4388  free_msg:
4389         nlmsg_free(msg);
4390         return err;
4391 }
4392
4393 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4394                                             struct genl_info *info)
4395 {
4396         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4397         struct net_device *dev = info->user_ptr[1];
4398         u64 cookie;
4399
4400         if (!info->attrs[NL80211_ATTR_COOKIE])
4401                 return -EINVAL;
4402
4403         if (!rdev->ops->cancel_remain_on_channel)
4404                 return -EOPNOTSUPP;
4405
4406         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4407
4408         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4409 }
4410
4411 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4412                            u8 *rates, u8 rates_len)
4413 {
4414         u8 i;
4415         u32 mask = 0;
4416
4417         for (i = 0; i < rates_len; i++) {
4418                 int rate = (rates[i] & 0x7f) * 5;
4419                 int ridx;
4420                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4421                         struct ieee80211_rate *srate =
4422                                 &sband->bitrates[ridx];
4423                         if (rate == srate->bitrate) {
4424                                 mask |= 1 << ridx;
4425                                 break;
4426                         }
4427                 }
4428                 if (ridx == sband->n_bitrates)
4429                         return 0; /* rate not found */
4430         }
4431
4432         return mask;
4433 }
4434
4435 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4436         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4437                                     .len = NL80211_MAX_SUPP_RATES },
4438 };
4439
4440 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4441                                        struct genl_info *info)
4442 {
4443         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4444         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4445         struct cfg80211_bitrate_mask mask;
4446         int rem, i;
4447         struct net_device *dev = info->user_ptr[1];
4448         struct nlattr *tx_rates;
4449         struct ieee80211_supported_band *sband;
4450
4451         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4452                 return -EINVAL;
4453
4454         if (!rdev->ops->set_bitrate_mask)
4455                 return -EOPNOTSUPP;
4456
4457         memset(&mask, 0, sizeof(mask));
4458         /* Default to all rates enabled */
4459         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4460                 sband = rdev->wiphy.bands[i];
4461                 mask.control[i].legacy =
4462                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4463         }
4464
4465         /*
4466          * The nested attribute uses enum nl80211_band as the index. This maps
4467          * directly to the enum ieee80211_band values used in cfg80211.
4468          */
4469         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4470         {
4471                 enum ieee80211_band band = nla_type(tx_rates);
4472                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4473                         return -EINVAL;
4474                 sband = rdev->wiphy.bands[band];
4475                 if (sband == NULL)
4476                         return -EINVAL;
4477                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4478                           nla_len(tx_rates), nl80211_txattr_policy);
4479                 if (tb[NL80211_TXRATE_LEGACY]) {
4480                         mask.control[band].legacy = rateset_to_mask(
4481                                 sband,
4482                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4483                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4484                         if (mask.control[band].legacy == 0)
4485                                 return -EINVAL;
4486                 }
4487         }
4488
4489         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4490 }
4491
4492 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4493 {
4494         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4495         struct net_device *dev = info->user_ptr[1];
4496         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4497
4498         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4499                 return -EINVAL;
4500
4501         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4502                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4503
4504         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4505             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4506             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4507             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4508             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4509             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4510             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4511                 return -EOPNOTSUPP;
4512
4513         /* not much point in registering if we can't reply */
4514         if (!rdev->ops->mgmt_tx)
4515                 return -EOPNOTSUPP;
4516
4517         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4518                         frame_type,
4519                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4520                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4521 }
4522
4523 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4524 {
4525         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4526         struct net_device *dev = info->user_ptr[1];
4527         struct ieee80211_channel *chan;
4528         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4529         bool channel_type_valid = false;
4530         u32 freq;
4531         int err;
4532         void *hdr;
4533         u64 cookie;
4534         struct sk_buff *msg;
4535         unsigned int wait = 0;
4536         bool offchan;
4537
4538         if (!info->attrs[NL80211_ATTR_FRAME] ||
4539             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4540                 return -EINVAL;
4541
4542         if (!rdev->ops->mgmt_tx)
4543                 return -EOPNOTSUPP;
4544
4545         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4546             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4547             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4548             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4549             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4550             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4551             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4552                 return -EOPNOTSUPP;
4553
4554         if (info->attrs[NL80211_ATTR_DURATION]) {
4555                 if (!rdev->ops->mgmt_tx_cancel_wait)
4556                         return -EINVAL;
4557                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4558         }
4559
4560         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4561                 channel_type = nla_get_u32(
4562                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4563                 if (channel_type != NL80211_CHAN_NO_HT &&
4564                     channel_type != NL80211_CHAN_HT20 &&
4565                     channel_type != NL80211_CHAN_HT40PLUS &&
4566                     channel_type != NL80211_CHAN_HT40MINUS)
4567                         return -EINVAL;
4568                 channel_type_valid = true;
4569         }
4570
4571         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4572
4573         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4574         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4575         if (chan == NULL)
4576                 return -EINVAL;
4577
4578         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4579         if (!msg)
4580                 return -ENOMEM;
4581
4582         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4583                              NL80211_CMD_FRAME);
4584
4585         if (IS_ERR(hdr)) {
4586                 err = PTR_ERR(hdr);
4587                 goto free_msg;
4588         }
4589         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4590                                     channel_type_valid, wait,
4591                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4592                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4593                                     &cookie);
4594         if (err)
4595                 goto free_msg;
4596
4597         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4598
4599         genlmsg_end(msg, hdr);
4600         return genlmsg_reply(msg, info);
4601
4602  nla_put_failure:
4603         err = -ENOBUFS;
4604  free_msg:
4605         nlmsg_free(msg);
4606         return err;
4607 }
4608
4609 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4610 {
4611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4612         struct net_device *dev = info->user_ptr[1];
4613         u64 cookie;
4614
4615         if (!info->attrs[NL80211_ATTR_COOKIE])
4616                 return -EINVAL;
4617
4618         if (!rdev->ops->mgmt_tx_cancel_wait)
4619                 return -EOPNOTSUPP;
4620
4621         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4622             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4623             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4624             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4625             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4626             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4627                 return -EOPNOTSUPP;
4628
4629         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4630
4631         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4632 }
4633
4634 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4635 {
4636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4637         struct wireless_dev *wdev;
4638         struct net_device *dev = info->user_ptr[1];
4639         u8 ps_state;
4640         bool state;
4641         int err;
4642
4643         if (!info->attrs[NL80211_ATTR_PS_STATE])
4644                 return -EINVAL;
4645
4646         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4647
4648         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4649                 return -EINVAL;
4650
4651         wdev = dev->ieee80211_ptr;
4652
4653         if (!rdev->ops->set_power_mgmt)
4654                 return -EOPNOTSUPP;
4655
4656         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4657
4658         if (state == wdev->ps)
4659                 return 0;
4660
4661         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4662                                         wdev->ps_timeout);
4663         if (!err)
4664                 wdev->ps = state;
4665         return err;
4666 }
4667
4668 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4669 {
4670         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4671         enum nl80211_ps_state ps_state;
4672         struct wireless_dev *wdev;
4673         struct net_device *dev = info->user_ptr[1];
4674         struct sk_buff *msg;
4675         void *hdr;
4676         int err;
4677
4678         wdev = dev->ieee80211_ptr;
4679
4680         if (!rdev->ops->set_power_mgmt)
4681                 return -EOPNOTSUPP;
4682
4683         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4684         if (!msg)
4685                 return -ENOMEM;
4686
4687         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4688                              NL80211_CMD_GET_POWER_SAVE);
4689         if (!hdr) {
4690                 err = -ENOBUFS;
4691                 goto free_msg;
4692         }
4693
4694         if (wdev->ps)
4695                 ps_state = NL80211_PS_ENABLED;
4696         else
4697                 ps_state = NL80211_PS_DISABLED;
4698
4699         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4700
4701         genlmsg_end(msg, hdr);
4702         return genlmsg_reply(msg, info);
4703
4704  nla_put_failure:
4705         err = -ENOBUFS;
4706  free_msg:
4707         nlmsg_free(msg);
4708         return err;
4709 }
4710
4711 static struct nla_policy
4712 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4713         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4714         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4715         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4716 };
4717
4718 static int nl80211_set_cqm_rssi(struct genl_info *info,
4719                                 s32 threshold, u32 hysteresis)
4720 {
4721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4722         struct wireless_dev *wdev;
4723         struct net_device *dev = info->user_ptr[1];
4724
4725         if (threshold > 0)
4726                 return -EINVAL;
4727
4728         wdev = dev->ieee80211_ptr;
4729
4730         if (!rdev->ops->set_cqm_rssi_config)
4731                 return -EOPNOTSUPP;
4732
4733         if (wdev->iftype != NL80211_IFTYPE_STATION &&
4734             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4735                 return -EOPNOTSUPP;
4736
4737         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4738                                               threshold, hysteresis);
4739 }
4740
4741 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4742 {
4743         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4744         struct nlattr *cqm;
4745         int err;
4746
4747         cqm = info->attrs[NL80211_ATTR_CQM];
4748         if (!cqm) {
4749                 err = -EINVAL;
4750                 goto out;
4751         }
4752
4753         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4754                                nl80211_attr_cqm_policy);
4755         if (err)
4756                 goto out;
4757
4758         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4759             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4760                 s32 threshold;
4761                 u32 hysteresis;
4762                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4763                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4764                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4765         } else
4766                 err = -EINVAL;
4767
4768 out:
4769         return err;
4770 }
4771
4772 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
4773 {
4774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4775         struct net_device *dev = info->user_ptr[1];
4776         struct mesh_config cfg;
4777         struct mesh_setup setup;
4778         int err;
4779
4780         /* start with default */
4781         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
4782         memcpy(&setup, &default_mesh_setup, sizeof(setup));
4783
4784         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
4785                 /* and parse parameters if given */
4786                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
4787                 if (err)
4788                         return err;
4789         }
4790
4791         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
4792             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
4793                 return -EINVAL;
4794
4795         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
4796         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
4797
4798         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
4799                 /* parse additional setup parameters if given */
4800                 err = nl80211_parse_mesh_setup(info, &setup);
4801                 if (err)
4802                         return err;
4803         }
4804
4805         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
4806 }
4807
4808 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
4809 {
4810         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4811         struct net_device *dev = info->user_ptr[1];
4812
4813         return cfg80211_leave_mesh(rdev, dev);
4814 }
4815
4816 #define NL80211_FLAG_NEED_WIPHY         0x01
4817 #define NL80211_FLAG_NEED_NETDEV        0x02
4818 #define NL80211_FLAG_NEED_RTNL          0x04
4819 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
4820 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
4821                                          NL80211_FLAG_CHECK_NETDEV_UP)
4822
4823 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4824                             struct genl_info *info)
4825 {
4826         struct cfg80211_registered_device *rdev;
4827         struct net_device *dev;
4828         int err;
4829         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4830
4831         if (rtnl)
4832                 rtnl_lock();
4833
4834         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4835                 rdev = cfg80211_get_dev_from_info(info);
4836                 if (IS_ERR(rdev)) {
4837                         if (rtnl)
4838                                 rtnl_unlock();
4839                         return PTR_ERR(rdev);
4840                 }
4841                 info->user_ptr[0] = rdev;
4842         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4843                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4844                 if (err) {
4845                         if (rtnl)
4846                                 rtnl_unlock();
4847                         return err;
4848                 }
4849                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4850                     !netif_running(dev)) {
4851                         cfg80211_unlock_rdev(rdev);
4852                         dev_put(dev);
4853                         if (rtnl)
4854                                 rtnl_unlock();
4855                         return -ENETDOWN;
4856                 }
4857                 info->user_ptr[0] = rdev;
4858                 info->user_ptr[1] = dev;
4859         }
4860
4861         return 0;
4862 }
4863
4864 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4865                               struct genl_info *info)
4866 {
4867         if (info->user_ptr[0])
4868                 cfg80211_unlock_rdev(info->user_ptr[0]);
4869         if (info->user_ptr[1])
4870                 dev_put(info->user_ptr[1]);
4871         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4872                 rtnl_unlock();
4873 }
4874
4875 static struct genl_ops nl80211_ops[] = {
4876         {
4877                 .cmd = NL80211_CMD_GET_WIPHY,
4878                 .doit = nl80211_get_wiphy,
4879                 .dumpit = nl80211_dump_wiphy,
4880                 .policy = nl80211_policy,
4881                 /* can be retrieved by unprivileged users */
4882                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4883         },
4884         {
4885                 .cmd = NL80211_CMD_SET_WIPHY,
4886                 .doit = nl80211_set_wiphy,
4887                 .policy = nl80211_policy,
4888                 .flags = GENL_ADMIN_PERM,
4889                 .internal_flags = NL80211_FLAG_NEED_RTNL,
4890         },
4891         {
4892                 .cmd = NL80211_CMD_GET_INTERFACE,
4893                 .doit = nl80211_get_interface,
4894                 .dumpit = nl80211_dump_interface,
4895                 .policy = nl80211_policy,
4896                 /* can be retrieved by unprivileged users */
4897                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4898         },
4899         {
4900                 .cmd = NL80211_CMD_SET_INTERFACE,
4901                 .doit = nl80211_set_interface,
4902                 .policy = nl80211_policy,
4903                 .flags = GENL_ADMIN_PERM,
4904                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4905                                   NL80211_FLAG_NEED_RTNL,
4906         },
4907         {
4908                 .cmd = NL80211_CMD_NEW_INTERFACE,
4909                 .doit = nl80211_new_interface,
4910                 .policy = nl80211_policy,
4911                 .flags = GENL_ADMIN_PERM,
4912                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4913                                   NL80211_FLAG_NEED_RTNL,
4914         },
4915         {
4916                 .cmd = NL80211_CMD_DEL_INTERFACE,
4917                 .doit = nl80211_del_interface,
4918                 .policy = nl80211_policy,
4919                 .flags = GENL_ADMIN_PERM,
4920                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4921                                   NL80211_FLAG_NEED_RTNL,
4922         },
4923         {
4924                 .cmd = NL80211_CMD_GET_KEY,
4925                 .doit = nl80211_get_key,
4926                 .policy = nl80211_policy,
4927                 .flags = GENL_ADMIN_PERM,
4928                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4929                                   NL80211_FLAG_NEED_RTNL,
4930         },
4931         {
4932                 .cmd = NL80211_CMD_SET_KEY,
4933                 .doit = nl80211_set_key,
4934                 .policy = nl80211_policy,
4935                 .flags = GENL_ADMIN_PERM,
4936                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4937                                   NL80211_FLAG_NEED_RTNL,
4938         },
4939         {
4940                 .cmd = NL80211_CMD_NEW_KEY,
4941                 .doit = nl80211_new_key,
4942                 .policy = nl80211_policy,
4943                 .flags = GENL_ADMIN_PERM,
4944                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4945                                   NL80211_FLAG_NEED_RTNL,
4946         },
4947         {
4948                 .cmd = NL80211_CMD_DEL_KEY,
4949                 .doit = nl80211_del_key,
4950                 .policy = nl80211_policy,
4951                 .flags = GENL_ADMIN_PERM,
4952                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4953                                   NL80211_FLAG_NEED_RTNL,
4954         },
4955         {
4956                 .cmd = NL80211_CMD_SET_BEACON,
4957                 .policy = nl80211_policy,
4958                 .flags = GENL_ADMIN_PERM,
4959                 .doit = nl80211_addset_beacon,
4960                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4961                                   NL80211_FLAG_NEED_RTNL,
4962         },
4963         {
4964                 .cmd = NL80211_CMD_NEW_BEACON,
4965                 .policy = nl80211_policy,
4966                 .flags = GENL_ADMIN_PERM,
4967                 .doit = nl80211_addset_beacon,
4968                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4969                                   NL80211_FLAG_NEED_RTNL,
4970         },
4971         {
4972                 .cmd = NL80211_CMD_DEL_BEACON,
4973                 .policy = nl80211_policy,
4974                 .flags = GENL_ADMIN_PERM,
4975                 .doit = nl80211_del_beacon,
4976                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4977                                   NL80211_FLAG_NEED_RTNL,
4978         },
4979         {
4980                 .cmd = NL80211_CMD_GET_STATION,
4981                 .doit = nl80211_get_station,
4982                 .dumpit = nl80211_dump_station,
4983                 .policy = nl80211_policy,
4984                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4985                                   NL80211_FLAG_NEED_RTNL,
4986         },
4987         {
4988                 .cmd = NL80211_CMD_SET_STATION,
4989                 .doit = nl80211_set_station,
4990                 .policy = nl80211_policy,
4991                 .flags = GENL_ADMIN_PERM,
4992                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4993                                   NL80211_FLAG_NEED_RTNL,
4994         },
4995         {
4996                 .cmd = NL80211_CMD_NEW_STATION,
4997                 .doit = nl80211_new_station,
4998                 .policy = nl80211_policy,
4999                 .flags = GENL_ADMIN_PERM,
5000                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5001                                   NL80211_FLAG_NEED_RTNL,
5002         },
5003         {
5004                 .cmd = NL80211_CMD_DEL_STATION,
5005                 .doit = nl80211_del_station,
5006                 .policy = nl80211_policy,
5007                 .flags = GENL_ADMIN_PERM,
5008                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5009                                   NL80211_FLAG_NEED_RTNL,
5010         },
5011         {
5012                 .cmd = NL80211_CMD_GET_MPATH,
5013                 .doit = nl80211_get_mpath,
5014                 .dumpit = nl80211_dump_mpath,
5015                 .policy = nl80211_policy,
5016                 .flags = GENL_ADMIN_PERM,
5017                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5018                                   NL80211_FLAG_NEED_RTNL,
5019         },
5020         {
5021                 .cmd = NL80211_CMD_SET_MPATH,
5022                 .doit = nl80211_set_mpath,
5023                 .policy = nl80211_policy,
5024                 .flags = GENL_ADMIN_PERM,
5025                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5026                                   NL80211_FLAG_NEED_RTNL,
5027         },
5028         {
5029                 .cmd = NL80211_CMD_NEW_MPATH,
5030                 .doit = nl80211_new_mpath,
5031                 .policy = nl80211_policy,
5032                 .flags = GENL_ADMIN_PERM,
5033                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5034                                   NL80211_FLAG_NEED_RTNL,
5035         },
5036         {
5037                 .cmd = NL80211_CMD_DEL_MPATH,
5038                 .doit = nl80211_del_mpath,
5039                 .policy = nl80211_policy,
5040                 .flags = GENL_ADMIN_PERM,
5041                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5042                                   NL80211_FLAG_NEED_RTNL,
5043         },
5044         {
5045                 .cmd = NL80211_CMD_SET_BSS,
5046                 .doit = nl80211_set_bss,
5047                 .policy = nl80211_policy,
5048                 .flags = GENL_ADMIN_PERM,
5049                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5050                                   NL80211_FLAG_NEED_RTNL,
5051         },
5052         {
5053                 .cmd = NL80211_CMD_GET_REG,
5054                 .doit = nl80211_get_reg,
5055                 .policy = nl80211_policy,
5056                 /* can be retrieved by unprivileged users */
5057         },
5058         {
5059                 .cmd = NL80211_CMD_SET_REG,
5060                 .doit = nl80211_set_reg,
5061                 .policy = nl80211_policy,
5062                 .flags = GENL_ADMIN_PERM,
5063         },
5064         {
5065                 .cmd = NL80211_CMD_REQ_SET_REG,
5066                 .doit = nl80211_req_set_reg,
5067                 .policy = nl80211_policy,
5068                 .flags = GENL_ADMIN_PERM,
5069         },
5070         {
5071                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
5072                 .doit = nl80211_get_mesh_config,
5073                 .policy = nl80211_policy,
5074                 /* can be retrieved by unprivileged users */
5075                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5076                                   NL80211_FLAG_NEED_RTNL,
5077         },
5078         {
5079                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
5080                 .doit = nl80211_update_mesh_config,
5081                 .policy = nl80211_policy,
5082                 .flags = GENL_ADMIN_PERM,
5083                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5084                                   NL80211_FLAG_NEED_RTNL,
5085         },
5086         {
5087                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5088                 .doit = nl80211_trigger_scan,
5089                 .policy = nl80211_policy,
5090                 .flags = GENL_ADMIN_PERM,
5091                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5092                                   NL80211_FLAG_NEED_RTNL,
5093         },
5094         {
5095                 .cmd = NL80211_CMD_GET_SCAN,
5096                 .policy = nl80211_policy,
5097                 .dumpit = nl80211_dump_scan,
5098         },
5099         {
5100                 .cmd = NL80211_CMD_AUTHENTICATE,
5101                 .doit = nl80211_authenticate,
5102                 .policy = nl80211_policy,
5103                 .flags = GENL_ADMIN_PERM,
5104                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5105                                   NL80211_FLAG_NEED_RTNL,
5106         },
5107         {
5108                 .cmd = NL80211_CMD_ASSOCIATE,
5109                 .doit = nl80211_associate,
5110                 .policy = nl80211_policy,
5111                 .flags = GENL_ADMIN_PERM,
5112                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5113                                   NL80211_FLAG_NEED_RTNL,
5114         },
5115         {
5116                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5117                 .doit = nl80211_deauthenticate,
5118                 .policy = nl80211_policy,
5119                 .flags = GENL_ADMIN_PERM,
5120                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5121                                   NL80211_FLAG_NEED_RTNL,
5122         },
5123         {
5124                 .cmd = NL80211_CMD_DISASSOCIATE,
5125                 .doit = nl80211_disassociate,
5126                 .policy = nl80211_policy,
5127                 .flags = GENL_ADMIN_PERM,
5128                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5129                                   NL80211_FLAG_NEED_RTNL,
5130         },
5131         {
5132                 .cmd = NL80211_CMD_JOIN_IBSS,
5133                 .doit = nl80211_join_ibss,
5134                 .policy = nl80211_policy,
5135                 .flags = GENL_ADMIN_PERM,
5136                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5137                                   NL80211_FLAG_NEED_RTNL,
5138         },
5139         {
5140                 .cmd = NL80211_CMD_LEAVE_IBSS,
5141                 .doit = nl80211_leave_ibss,
5142                 .policy = nl80211_policy,
5143                 .flags = GENL_ADMIN_PERM,
5144                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5145                                   NL80211_FLAG_NEED_RTNL,
5146         },
5147 #ifdef CONFIG_NL80211_TESTMODE
5148         {
5149                 .cmd = NL80211_CMD_TESTMODE,
5150                 .doit = nl80211_testmode_do,
5151                 .policy = nl80211_policy,
5152                 .flags = GENL_ADMIN_PERM,
5153                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5154                                   NL80211_FLAG_NEED_RTNL,
5155         },
5156 #endif
5157         {
5158                 .cmd = NL80211_CMD_CONNECT,
5159                 .doit = nl80211_connect,
5160                 .policy = nl80211_policy,
5161                 .flags = GENL_ADMIN_PERM,
5162                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5163                                   NL80211_FLAG_NEED_RTNL,
5164         },
5165         {
5166                 .cmd = NL80211_CMD_DISCONNECT,
5167                 .doit = nl80211_disconnect,
5168                 .policy = nl80211_policy,
5169                 .flags = GENL_ADMIN_PERM,
5170                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5171                                   NL80211_FLAG_NEED_RTNL,
5172         },
5173         {
5174                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5175                 .doit = nl80211_wiphy_netns,
5176                 .policy = nl80211_policy,
5177                 .flags = GENL_ADMIN_PERM,
5178                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5179                                   NL80211_FLAG_NEED_RTNL,
5180         },
5181         {
5182                 .cmd = NL80211_CMD_GET_SURVEY,
5183                 .policy = nl80211_policy,
5184                 .dumpit = nl80211_dump_survey,
5185         },
5186         {
5187                 .cmd = NL80211_CMD_SET_PMKSA,
5188                 .doit = nl80211_setdel_pmksa,
5189                 .policy = nl80211_policy,
5190                 .flags = GENL_ADMIN_PERM,
5191                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5192                                   NL80211_FLAG_NEED_RTNL,
5193         },
5194         {
5195                 .cmd = NL80211_CMD_DEL_PMKSA,
5196                 .doit = nl80211_setdel_pmksa,
5197                 .policy = nl80211_policy,
5198                 .flags = GENL_ADMIN_PERM,
5199                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5200                                   NL80211_FLAG_NEED_RTNL,
5201         },
5202         {
5203                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5204                 .doit = nl80211_flush_pmksa,
5205                 .policy = nl80211_policy,
5206                 .flags = GENL_ADMIN_PERM,
5207                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5208                                   NL80211_FLAG_NEED_RTNL,
5209         },
5210         {
5211                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5212                 .doit = nl80211_remain_on_channel,
5213                 .policy = nl80211_policy,
5214                 .flags = GENL_ADMIN_PERM,
5215                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5216                                   NL80211_FLAG_NEED_RTNL,
5217         },
5218         {
5219                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5220                 .doit = nl80211_cancel_remain_on_channel,
5221                 .policy = nl80211_policy,
5222                 .flags = GENL_ADMIN_PERM,
5223                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5224                                   NL80211_FLAG_NEED_RTNL,
5225         },
5226         {
5227                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5228                 .doit = nl80211_set_tx_bitrate_mask,
5229                 .policy = nl80211_policy,
5230                 .flags = GENL_ADMIN_PERM,
5231                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5232                                   NL80211_FLAG_NEED_RTNL,
5233         },
5234         {
5235                 .cmd = NL80211_CMD_REGISTER_FRAME,
5236                 .doit = nl80211_register_mgmt,
5237                 .policy = nl80211_policy,
5238                 .flags = GENL_ADMIN_PERM,
5239                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5240                                   NL80211_FLAG_NEED_RTNL,
5241         },
5242         {
5243                 .cmd = NL80211_CMD_FRAME,
5244                 .doit = nl80211_tx_mgmt,
5245                 .policy = nl80211_policy,
5246                 .flags = GENL_ADMIN_PERM,
5247                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5248                                   NL80211_FLAG_NEED_RTNL,
5249         },
5250         {
5251                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5252                 .doit = nl80211_tx_mgmt_cancel_wait,
5253                 .policy = nl80211_policy,
5254                 .flags = GENL_ADMIN_PERM,
5255                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5256                                   NL80211_FLAG_NEED_RTNL,
5257         },
5258         {
5259                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5260                 .doit = nl80211_set_power_save,
5261                 .policy = nl80211_policy,
5262                 .flags = GENL_ADMIN_PERM,
5263                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5264                                   NL80211_FLAG_NEED_RTNL,
5265         },
5266         {
5267                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5268                 .doit = nl80211_get_power_save,
5269                 .policy = nl80211_policy,
5270                 /* can be retrieved by unprivileged users */
5271                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5272                                   NL80211_FLAG_NEED_RTNL,
5273         },
5274         {
5275                 .cmd = NL80211_CMD_SET_CQM,
5276                 .doit = nl80211_set_cqm,
5277                 .policy = nl80211_policy,
5278                 .flags = GENL_ADMIN_PERM,
5279                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5280                                   NL80211_FLAG_NEED_RTNL,
5281         },
5282         {
5283                 .cmd = NL80211_CMD_SET_CHANNEL,
5284                 .doit = nl80211_set_channel,
5285                 .policy = nl80211_policy,
5286                 .flags = GENL_ADMIN_PERM,
5287                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5288                                   NL80211_FLAG_NEED_RTNL,
5289         },
5290         {
5291                 .cmd = NL80211_CMD_SET_WDS_PEER,
5292                 .doit = nl80211_set_wds_peer,
5293                 .policy = nl80211_policy,
5294                 .flags = GENL_ADMIN_PERM,
5295                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5296                                   NL80211_FLAG_NEED_RTNL,
5297         },
5298         {
5299                 .cmd = NL80211_CMD_JOIN_MESH,
5300                 .doit = nl80211_join_mesh,
5301                 .policy = nl80211_policy,
5302                 .flags = GENL_ADMIN_PERM,
5303                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5304                                   NL80211_FLAG_NEED_RTNL,
5305         },
5306         {
5307                 .cmd = NL80211_CMD_LEAVE_MESH,
5308                 .doit = nl80211_leave_mesh,
5309                 .policy = nl80211_policy,
5310                 .flags = GENL_ADMIN_PERM,
5311                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5312                                   NL80211_FLAG_NEED_RTNL,
5313         },
5314 };
5315
5316 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5317         .name = "mlme",
5318 };
5319
5320 /* multicast groups */
5321 static struct genl_multicast_group nl80211_config_mcgrp = {
5322         .name = "config",
5323 };
5324 static struct genl_multicast_group nl80211_scan_mcgrp = {
5325         .name = "scan",
5326 };
5327 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5328         .name = "regulatory",
5329 };
5330
5331 /* notification functions */
5332
5333 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5334 {
5335         struct sk_buff *msg;
5336
5337         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5338         if (!msg)
5339                 return;
5340
5341         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5342                 nlmsg_free(msg);
5343                 return;
5344         }
5345
5346         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5347                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5348 }
5349
5350 static int nl80211_add_scan_req(struct sk_buff *msg,
5351                                 struct cfg80211_registered_device *rdev)
5352 {
5353         struct cfg80211_scan_request *req = rdev->scan_req;
5354         struct nlattr *nest;
5355         int i;
5356
5357         ASSERT_RDEV_LOCK(rdev);
5358
5359         if (WARN_ON(!req))
5360                 return 0;
5361
5362         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5363         if (!nest)
5364                 goto nla_put_failure;
5365         for (i = 0; i < req->n_ssids; i++)
5366                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5367         nla_nest_end(msg, nest);
5368
5369         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5370         if (!nest)
5371                 goto nla_put_failure;
5372         for (i = 0; i < req->n_channels; i++)
5373                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5374         nla_nest_end(msg, nest);
5375
5376         if (req->ie)
5377                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5378
5379         return 0;
5380  nla_put_failure:
5381         return -ENOBUFS;
5382 }
5383
5384 static int nl80211_send_scan_msg(struct sk_buff *msg,
5385                                  struct cfg80211_registered_device *rdev,
5386                                  struct net_device *netdev,
5387                                  u32 pid, u32 seq, int flags,
5388                                  u32 cmd)
5389 {
5390         void *hdr;
5391
5392         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5393         if (!hdr)
5394                 return -1;
5395
5396         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5397         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5398
5399         /* ignore errors and send incomplete event anyway */
5400         nl80211_add_scan_req(msg, rdev);
5401
5402         return genlmsg_end(msg, hdr);
5403
5404  nla_put_failure:
5405         genlmsg_cancel(msg, hdr);
5406         return -EMSGSIZE;
5407 }
5408
5409 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5410                              struct net_device *netdev)
5411 {
5412         struct sk_buff *msg;
5413
5414         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5415         if (!msg)
5416                 return;
5417
5418         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5419                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5420                 nlmsg_free(msg);
5421                 return;
5422         }
5423
5424         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5425                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5426 }
5427
5428 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5429                             struct net_device *netdev)
5430 {
5431         struct sk_buff *msg;
5432
5433         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5434         if (!msg)
5435                 return;
5436
5437         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5438                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5439                 nlmsg_free(msg);
5440                 return;
5441         }
5442
5443         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5444                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5445 }
5446
5447 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5448                                struct net_device *netdev)
5449 {
5450         struct sk_buff *msg;
5451
5452         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5453         if (!msg)
5454                 return;
5455
5456         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5457                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5458                 nlmsg_free(msg);
5459                 return;
5460         }
5461
5462         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5463                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5464 }
5465
5466 /*
5467  * This can happen on global regulatory changes or device specific settings
5468  * based on custom world regulatory domains.
5469  */
5470 void nl80211_send_reg_change_event(struct regulatory_request *request)
5471 {
5472         struct sk_buff *msg;
5473         void *hdr;
5474
5475         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5476         if (!msg)
5477                 return;
5478
5479         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5480         if (!hdr) {
5481                 nlmsg_free(msg);
5482                 return;
5483         }
5484
5485         /* Userspace can always count this one always being set */
5486         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5487
5488         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5489                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5490                            NL80211_REGDOM_TYPE_WORLD);
5491         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5492                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5493                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5494         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5495                  request->intersect)
5496                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5497                            NL80211_REGDOM_TYPE_INTERSECTION);
5498         else {
5499                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5500                            NL80211_REGDOM_TYPE_COUNTRY);
5501                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5502         }
5503
5504         if (wiphy_idx_valid(request->wiphy_idx))
5505                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5506
5507         if (genlmsg_end(msg, hdr) < 0) {
5508                 nlmsg_free(msg);
5509                 return;
5510         }
5511
5512         rcu_read_lock();
5513         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5514                                 GFP_ATOMIC);
5515         rcu_read_unlock();
5516
5517         return;
5518
5519 nla_put_failure:
5520         genlmsg_cancel(msg, hdr);
5521         nlmsg_free(msg);
5522 }
5523
5524 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5525                                     struct net_device *netdev,
5526                                     const u8 *buf, size_t len,
5527                                     enum nl80211_commands cmd, gfp_t gfp)
5528 {
5529         struct sk_buff *msg;
5530         void *hdr;
5531
5532         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5533         if (!msg)
5534                 return;
5535
5536         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5537         if (!hdr) {
5538                 nlmsg_free(msg);
5539                 return;
5540         }
5541
5542         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5543         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5544         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5545
5546         if (genlmsg_end(msg, hdr) < 0) {
5547                 nlmsg_free(msg);
5548                 return;
5549         }
5550
5551         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5552                                 nl80211_mlme_mcgrp.id, gfp);
5553         return;
5554
5555  nla_put_failure:
5556         genlmsg_cancel(msg, hdr);
5557         nlmsg_free(msg);
5558 }
5559
5560 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5561                           struct net_device *netdev, const u8 *buf,
5562                           size_t len, gfp_t gfp)
5563 {
5564         nl80211_send_mlme_event(rdev, netdev, buf, len,
5565                                 NL80211_CMD_AUTHENTICATE, gfp);
5566 }
5567
5568 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5569                            struct net_device *netdev, const u8 *buf,
5570                            size_t len, gfp_t gfp)
5571 {
5572         nl80211_send_mlme_event(rdev, netdev, buf, len,
5573                                 NL80211_CMD_ASSOCIATE, gfp);
5574 }
5575
5576 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5577                          struct net_device *netdev, const u8 *buf,
5578                          size_t len, gfp_t gfp)
5579 {
5580         nl80211_send_mlme_event(rdev, netdev, buf, len,
5581                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5582 }
5583
5584 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5585                            struct net_device *netdev, const u8 *buf,
5586                            size_t len, gfp_t gfp)
5587 {
5588         nl80211_send_mlme_event(rdev, netdev, buf, len,
5589                                 NL80211_CMD_DISASSOCIATE, gfp);
5590 }
5591
5592 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
5593                                 struct net_device *netdev, const u8 *buf,
5594                                 size_t len, gfp_t gfp)
5595 {
5596         nl80211_send_mlme_event(rdev, netdev, buf, len,
5597                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
5598 }
5599
5600 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
5601                                   struct net_device *netdev, const u8 *buf,
5602                                   size_t len, gfp_t gfp)
5603 {
5604         nl80211_send_mlme_event(rdev, netdev, buf, len,
5605                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
5606 }
5607
5608 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5609                                       struct net_device *netdev, int cmd,
5610                                       const u8 *addr, 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, cmd);
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_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5628         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5629
5630         if (genlmsg_end(msg, hdr) < 0) {
5631                 nlmsg_free(msg);
5632                 return;
5633         }
5634
5635         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5636                                 nl80211_mlme_mcgrp.id, gfp);
5637         return;
5638
5639  nla_put_failure:
5640         genlmsg_cancel(msg, hdr);
5641         nlmsg_free(msg);
5642 }
5643
5644 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5645                                struct net_device *netdev, const u8 *addr,
5646                                gfp_t gfp)
5647 {
5648         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5649                                   addr, gfp);
5650 }
5651
5652 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5653                                 struct net_device *netdev, const u8 *addr,
5654                                 gfp_t gfp)
5655 {
5656         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5657                                   addr, gfp);
5658 }
5659
5660 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5661                                  struct net_device *netdev, const u8 *bssid,
5662                                  const u8 *req_ie, size_t req_ie_len,
5663                                  const u8 *resp_ie, size_t resp_ie_len,
5664                                  u16 status, gfp_t gfp)
5665 {
5666         struct sk_buff *msg;
5667         void *hdr;
5668
5669         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5670         if (!msg)
5671                 return;
5672
5673         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5674         if (!hdr) {
5675                 nlmsg_free(msg);
5676                 return;
5677         }
5678
5679         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5680         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5681         if (bssid)
5682                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5683         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5684         if (req_ie)
5685                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5686         if (resp_ie)
5687                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5688
5689         if (genlmsg_end(msg, hdr) < 0) {
5690                 nlmsg_free(msg);
5691                 return;
5692         }
5693
5694         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5695                                 nl80211_mlme_mcgrp.id, gfp);
5696         return;
5697
5698  nla_put_failure:
5699         genlmsg_cancel(msg, hdr);
5700         nlmsg_free(msg);
5701
5702 }
5703
5704 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5705                          struct net_device *netdev, const u8 *bssid,
5706                          const u8 *req_ie, size_t req_ie_len,
5707                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5708 {
5709         struct sk_buff *msg;
5710         void *hdr;
5711
5712         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5713         if (!msg)
5714                 return;
5715
5716         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5717         if (!hdr) {
5718                 nlmsg_free(msg);
5719                 return;
5720         }
5721
5722         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5723         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5724         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5725         if (req_ie)
5726                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5727         if (resp_ie)
5728                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5729
5730         if (genlmsg_end(msg, hdr) < 0) {
5731                 nlmsg_free(msg);
5732                 return;
5733         }
5734
5735         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5736                                 nl80211_mlme_mcgrp.id, gfp);
5737         return;
5738
5739  nla_put_failure:
5740         genlmsg_cancel(msg, hdr);
5741         nlmsg_free(msg);
5742
5743 }
5744
5745 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5746                                struct net_device *netdev, u16 reason,
5747                                const u8 *ie, size_t ie_len, bool from_ap)
5748 {
5749         struct sk_buff *msg;
5750         void *hdr;
5751
5752         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5753         if (!msg)
5754                 return;
5755
5756         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5757         if (!hdr) {
5758                 nlmsg_free(msg);
5759                 return;
5760         }
5761
5762         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5763         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5764         if (from_ap && reason)
5765                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5766         if (from_ap)
5767                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5768         if (ie)
5769                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5770
5771         if (genlmsg_end(msg, hdr) < 0) {
5772                 nlmsg_free(msg);
5773                 return;
5774         }
5775
5776         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5777                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5778         return;
5779
5780  nla_put_failure:
5781         genlmsg_cancel(msg, hdr);
5782         nlmsg_free(msg);
5783
5784 }
5785
5786 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5787                              struct net_device *netdev, const u8 *bssid,
5788                              gfp_t gfp)
5789 {
5790         struct sk_buff *msg;
5791         void *hdr;
5792
5793         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5794         if (!msg)
5795                 return;
5796
5797         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5798         if (!hdr) {
5799                 nlmsg_free(msg);
5800                 return;
5801         }
5802
5803         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5804         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5805         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5806
5807         if (genlmsg_end(msg, hdr) < 0) {
5808                 nlmsg_free(msg);
5809                 return;
5810         }
5811
5812         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5813                                 nl80211_mlme_mcgrp.id, gfp);
5814         return;
5815
5816  nla_put_failure:
5817         genlmsg_cancel(msg, hdr);
5818         nlmsg_free(msg);
5819 }
5820
5821 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
5822                 struct net_device *netdev,
5823                 const u8 *macaddr, const u8* ie, u8 ie_len,
5824                 gfp_t gfp)
5825 {
5826         struct sk_buff *msg;
5827         void *hdr;
5828
5829         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5830         if (!msg)
5831                 return;
5832
5833         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
5834         if (!hdr) {
5835                 nlmsg_free(msg);
5836                 return;
5837         }
5838
5839         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5840         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5841         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
5842         if (ie_len && ie)
5843                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
5844
5845         if (genlmsg_end(msg, hdr) < 0) {
5846                 nlmsg_free(msg);
5847                 return;
5848         }
5849
5850         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5851                                 nl80211_mlme_mcgrp.id, gfp);
5852         return;
5853
5854  nla_put_failure:
5855         genlmsg_cancel(msg, hdr);
5856         nlmsg_free(msg);
5857 }
5858
5859 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5860                                  struct net_device *netdev, const u8 *addr,
5861                                  enum nl80211_key_type key_type, int key_id,
5862                                  const u8 *tsc, gfp_t gfp)
5863 {
5864         struct sk_buff *msg;
5865         void *hdr;
5866
5867         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5868         if (!msg)
5869                 return;
5870
5871         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5872         if (!hdr) {
5873                 nlmsg_free(msg);
5874                 return;
5875         }
5876
5877         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5878         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5879         if (addr)
5880                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5881         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5882         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5883         if (tsc)
5884                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5885
5886         if (genlmsg_end(msg, hdr) < 0) {
5887                 nlmsg_free(msg);
5888                 return;
5889         }
5890
5891         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5892                                 nl80211_mlme_mcgrp.id, gfp);
5893         return;
5894
5895  nla_put_failure:
5896         genlmsg_cancel(msg, hdr);
5897         nlmsg_free(msg);
5898 }
5899
5900 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5901                                     struct ieee80211_channel *channel_before,
5902                                     struct ieee80211_channel *channel_after)
5903 {
5904         struct sk_buff *msg;
5905         void *hdr;
5906         struct nlattr *nl_freq;
5907
5908         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5909         if (!msg)
5910                 return;
5911
5912         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5913         if (!hdr) {
5914                 nlmsg_free(msg);
5915                 return;
5916         }
5917
5918         /*
5919          * Since we are applying the beacon hint to a wiphy we know its
5920          * wiphy_idx is valid
5921          */
5922         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5923
5924         /* Before */
5925         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5926         if (!nl_freq)
5927                 goto nla_put_failure;
5928         if (nl80211_msg_put_channel(msg, channel_before))
5929                 goto nla_put_failure;
5930         nla_nest_end(msg, nl_freq);
5931
5932         /* After */
5933         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5934         if (!nl_freq)
5935                 goto nla_put_failure;
5936         if (nl80211_msg_put_channel(msg, channel_after))
5937                 goto nla_put_failure;
5938         nla_nest_end(msg, nl_freq);
5939
5940         if (genlmsg_end(msg, hdr) < 0) {
5941                 nlmsg_free(msg);
5942                 return;
5943         }
5944
5945         rcu_read_lock();
5946         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5947                                 GFP_ATOMIC);
5948         rcu_read_unlock();
5949
5950         return;
5951
5952 nla_put_failure:
5953         genlmsg_cancel(msg, hdr);
5954         nlmsg_free(msg);
5955 }
5956
5957 static void nl80211_send_remain_on_chan_event(
5958         int cmd, struct cfg80211_registered_device *rdev,
5959         struct net_device *netdev, u64 cookie,
5960         struct ieee80211_channel *chan,
5961         enum nl80211_channel_type channel_type,
5962         unsigned int duration, gfp_t gfp)
5963 {
5964         struct sk_buff *msg;
5965         void *hdr;
5966
5967         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5968         if (!msg)
5969                 return;
5970
5971         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5972         if (!hdr) {
5973                 nlmsg_free(msg);
5974                 return;
5975         }
5976
5977         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5978         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5979         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5980         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5981         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5982
5983         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5984                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5985
5986         if (genlmsg_end(msg, hdr) < 0) {
5987                 nlmsg_free(msg);
5988                 return;
5989         }
5990
5991         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5992                                 nl80211_mlme_mcgrp.id, gfp);
5993         return;
5994
5995  nla_put_failure:
5996         genlmsg_cancel(msg, hdr);
5997         nlmsg_free(msg);
5998 }
5999
6000 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
6001                                     struct net_device *netdev, u64 cookie,
6002                                     struct ieee80211_channel *chan,
6003                                     enum nl80211_channel_type channel_type,
6004                                     unsigned int duration, gfp_t gfp)
6005 {
6006         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
6007                                           rdev, netdev, cookie, chan,
6008                                           channel_type, duration, gfp);
6009 }
6010
6011 void nl80211_send_remain_on_channel_cancel(
6012         struct cfg80211_registered_device *rdev, struct net_device *netdev,
6013         u64 cookie, struct ieee80211_channel *chan,
6014         enum nl80211_channel_type channel_type, gfp_t gfp)
6015 {
6016         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6017                                           rdev, netdev, cookie, chan,
6018                                           channel_type, 0, gfp);
6019 }
6020
6021 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
6022                             struct net_device *dev, const u8 *mac_addr,
6023                             struct station_info *sinfo, gfp_t gfp)
6024 {
6025         struct sk_buff *msg;
6026
6027         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6028         if (!msg)
6029                 return;
6030
6031         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6032                 nlmsg_free(msg);
6033                 return;
6034         }
6035
6036         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6037                                 nl80211_mlme_mcgrp.id, gfp);
6038 }
6039
6040 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
6041                                 struct net_device *dev, const u8 *mac_addr,
6042                                 gfp_t gfp)
6043 {
6044         struct sk_buff *msg;
6045         void *hdr;
6046
6047         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6048         if (!msg)
6049                 return;
6050
6051         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
6052         if (!hdr) {
6053                 nlmsg_free(msg);
6054                 return;
6055         }
6056
6057         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
6058         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
6059
6060         if (genlmsg_end(msg, hdr) < 0) {
6061                 nlmsg_free(msg);
6062                 return;
6063         }
6064
6065         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6066                                 nl80211_mlme_mcgrp.id, gfp);
6067         return;
6068
6069  nla_put_failure:
6070         genlmsg_cancel(msg, hdr);
6071         nlmsg_free(msg);
6072 }
6073
6074 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
6075                       struct net_device *netdev, u32 nlpid,
6076                       int freq, const u8 *buf, size_t len, gfp_t gfp)
6077 {
6078         struct sk_buff *msg;
6079         void *hdr;
6080         int err;
6081
6082         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6083         if (!msg)
6084                 return -ENOMEM;
6085
6086         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
6087         if (!hdr) {
6088                 nlmsg_free(msg);
6089                 return -ENOMEM;
6090         }
6091
6092         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6093         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6094         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6095         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6096
6097         err = genlmsg_end(msg, hdr);
6098         if (err < 0) {
6099                 nlmsg_free(msg);
6100                 return err;
6101         }
6102
6103         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6104         if (err < 0)
6105                 return err;
6106         return 0;
6107
6108  nla_put_failure:
6109         genlmsg_cancel(msg, hdr);
6110         nlmsg_free(msg);
6111         return -ENOBUFS;
6112 }
6113
6114 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
6115                                  struct net_device *netdev, u64 cookie,
6116                                  const u8 *buf, size_t len, bool ack,
6117                                  gfp_t gfp)
6118 {
6119         struct sk_buff *msg;
6120         void *hdr;
6121
6122         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6123         if (!msg)
6124                 return;
6125
6126         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6127         if (!hdr) {
6128                 nlmsg_free(msg);
6129                 return;
6130         }
6131
6132         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6133         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6134         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6135         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6136         if (ack)
6137                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6138
6139         if (genlmsg_end(msg, hdr) < 0) {
6140                 nlmsg_free(msg);
6141                 return;
6142         }
6143
6144         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6145         return;
6146
6147  nla_put_failure:
6148         genlmsg_cancel(msg, hdr);
6149         nlmsg_free(msg);
6150 }
6151
6152 void
6153 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6154                              struct net_device *netdev,
6155                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6156                              gfp_t gfp)
6157 {
6158         struct sk_buff *msg;
6159         struct nlattr *pinfoattr;
6160         void *hdr;
6161
6162         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6163         if (!msg)
6164                 return;
6165
6166         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6167         if (!hdr) {
6168                 nlmsg_free(msg);
6169                 return;
6170         }
6171
6172         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6173         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6174
6175         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6176         if (!pinfoattr)
6177                 goto nla_put_failure;
6178
6179         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6180                     rssi_event);
6181
6182         nla_nest_end(msg, pinfoattr);
6183
6184         if (genlmsg_end(msg, hdr) < 0) {
6185                 nlmsg_free(msg);
6186                 return;
6187         }
6188
6189         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6190                                 nl80211_mlme_mcgrp.id, gfp);
6191         return;
6192
6193  nla_put_failure:
6194         genlmsg_cancel(msg, hdr);
6195         nlmsg_free(msg);
6196 }
6197
6198 void
6199 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
6200                                 struct net_device *netdev, const u8 *peer,
6201                                 u32 num_packets, gfp_t gfp)
6202 {
6203         struct sk_buff *msg;
6204         struct nlattr *pinfoattr;
6205         void *hdr;
6206
6207         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6208         if (!msg)
6209                 return;
6210
6211         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6212         if (!hdr) {
6213                 nlmsg_free(msg);
6214                 return;
6215         }
6216
6217         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6218         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6219         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6220
6221         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6222         if (!pinfoattr)
6223                 goto nla_put_failure;
6224
6225         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6226
6227         nla_nest_end(msg, pinfoattr);
6228
6229         if (genlmsg_end(msg, hdr) < 0) {
6230                 nlmsg_free(msg);
6231                 return;
6232         }
6233
6234         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6235                                 nl80211_mlme_mcgrp.id, gfp);
6236         return;
6237
6238  nla_put_failure:
6239         genlmsg_cancel(msg, hdr);
6240         nlmsg_free(msg);
6241 }
6242
6243 static int nl80211_netlink_notify(struct notifier_block * nb,
6244                                   unsigned long state,
6245                                   void *_notify)
6246 {
6247         struct netlink_notify *notify = _notify;
6248         struct cfg80211_registered_device *rdev;
6249         struct wireless_dev *wdev;
6250
6251         if (state != NETLINK_URELEASE)
6252                 return NOTIFY_DONE;
6253
6254         rcu_read_lock();
6255
6256         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6257                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6258                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6259
6260         rcu_read_unlock();
6261
6262         return NOTIFY_DONE;
6263 }
6264
6265 static struct notifier_block nl80211_netlink_notifier = {
6266         .notifier_call = nl80211_netlink_notify,
6267 };
6268
6269 /* initialisation/exit functions */
6270
6271 int nl80211_init(void)
6272 {
6273         int err;
6274
6275         err = genl_register_family_with_ops(&nl80211_fam,
6276                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6277         if (err)
6278                 return err;
6279
6280         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6281         if (err)
6282                 goto err_out;
6283
6284         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6285         if (err)
6286                 goto err_out;
6287
6288         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6289         if (err)
6290                 goto err_out;
6291
6292         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6293         if (err)
6294                 goto err_out;
6295
6296 #ifdef CONFIG_NL80211_TESTMODE
6297         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6298         if (err)
6299                 goto err_out;
6300 #endif
6301
6302         err = netlink_register_notifier(&nl80211_netlink_notifier);
6303         if (err)
6304                 goto err_out;
6305
6306         return 0;
6307  err_out:
6308         genl_unregister_family(&nl80211_fam);
6309         return err;
6310 }
6311
6312 void nl80211_exit(void)
6313 {
6314         netlink_unregister_notifier(&nl80211_netlink_notifier);
6315         genl_unregister_family(&nl80211_fam);
6316 }