Pileus Git - ~andy/linux/blob - 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_PARAMS] = { .type = NLA_NESTED },
 127
 128         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 129                                          .len = NL80211_HT_CAPABILITY_LEN },
 130
 131         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 132         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 133                               .len = IEEE80211_MAX_DATA_LEN },
 134         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 135         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 136
 137         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 138                                 .len = IEEE80211_MAX_SSID_LEN },
 139         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 140         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 141         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 142         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 143         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 144         [NL80211_ATTR_STA_FLAGS2] = {
 145                 .len = sizeof(struct nl80211_sta_flag_update),
 146         },
 147         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 149         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 150         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 151         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 152         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 153         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 154         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 155         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 156                                  .len = WLAN_PMKID_LEN },
 157         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 158         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 159         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 160         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 161                                  .len = IEEE80211_MAX_DATA_LEN },
 162         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 163         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 164         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 165         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 166         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 167         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 169         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 170         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 171         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 172         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 173         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 174         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 175 };
 176
 177 /* policy for the key attributes */
 178 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 179         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 180         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 181         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 182         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 183         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 184         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 185         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 186         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 187 };
 188
 189 /* policy for the key default flags */
 190 static const struct nla_policy
 191 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 192         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 193         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 194 };
 195
 196 /* ifidx get helper */
 197 static int nl80211_get_ifidx(struct netlink_callback *cb)
 198 {
 199         int res;
 200
 201         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 202                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 203                           nl80211_policy);
 204         if (res)
 205                 return res;
 206
 207         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 208                 return -EINVAL;
 209
 210         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 211         if (!res)
 212                 return -EINVAL;
 213         return res;
 214 }
 215
 216 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 217                                        struct netlink_callback *cb,
 218                                        struct cfg80211_registered_device **rdev,
 219                                        struct net_device **dev)
 220 {
 221         int ifidx = cb->args[0];
 222         int err;
 223
 224         if (!ifidx)
 225                 ifidx = nl80211_get_ifidx(cb);
 226         if (ifidx < 0)
 227                 return ifidx;
 228
 229         cb->args[0] = ifidx;
 230
 231         rtnl_lock();
 232
 233         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 234         if (!*dev) {
 235                 err = -ENODEV;
 236                 goto out_rtnl;
 237         }
 238
 239         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 240         if (IS_ERR(*rdev)) {
 241                 err = PTR_ERR(*rdev);
 242                 goto out_rtnl;
 243         }
 244
 245         return 0;
 246  out_rtnl:
 247         rtnl_unlock();
 248         return err;
 249 }
 250
 251 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 252 {
 253         cfg80211_unlock_rdev(rdev);
 254         rtnl_unlock();
 255 }
 256
 257 /* IE validation */
 258 static bool is_valid_ie_attr(const struct nlattr *attr)
 259 {
 260         const u8 *pos;
 261         int len;
 262
 263         if (!attr)
 264                 return true;
 265
 266         pos = nla_data(attr);
 267         len = nla_len(attr);
 268
 269         while (len) {
 270                 u8 elemlen;
 271
 272                 if (len < 2)
 273                         return false;
 274                 len -= 2;
 275
 276                 elemlen = pos[1];
 277                 if (elemlen > len)
 278                         return false;
 279
 280                 len -= elemlen;
 281                 pos += 2 + elemlen;
 282         }
 283
 284         return true;
 285 }
 286
 287 /* message building helper */
 288 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 289                                    int flags, u8 cmd)
 290 {
 291         /* since there is no private header just add the generic one */
 292         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 293 }
 294
 295 static int nl80211_msg_put_channel(struct sk_buff *msg,
 296                                    struct ieee80211_channel *chan)
 297 {
 298         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 299                     chan->center_freq);
 300
 301         if (chan->flags & IEEE80211_CHAN_DISABLED)
 302                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 303         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 304                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 305         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 306                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 307         if (chan->flags & IEEE80211_CHAN_RADAR)
 308                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 309
 310         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 311                     DBM_TO_MBM(chan->max_power));
 312
 313         return 0;
 314
 315  nla_put_failure:
 316         return -ENOBUFS;
 317 }
 318
 319 /* netlink command implementations */
 320
 321 struct key_parse {
 322         struct key_params p;
 323         int idx;
 324         int type;
 325         bool def, defmgmt;
 326         bool def_uni, def_multi;
 327 };
 328
 329 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 330 {
 331         struct nlattr *tb[NL80211_KEY_MAX + 1];
 332         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 333                                    nl80211_key_policy);
 334         if (err)
 335                 return err;
 336
 337         k->def = !!tb[NL80211_KEY_DEFAULT];
 338         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 339
 340         if (k->def) {
 341                 k->def_uni = true;
 342                 k->def_multi = true;
 343         }
 344         if (k->defmgmt)
 345                 k->def_multi = true;
 346
 347         if (tb[NL80211_KEY_IDX])
 348                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 349
 350         if (tb[NL80211_KEY_DATA]) {
 351                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 352                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 353         }
 354
 355         if (tb[NL80211_KEY_SEQ]) {
 356                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 357                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 358         }
 359
 360         if (tb[NL80211_KEY_CIPHER])
 361                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 362
 363         if (tb[NL80211_KEY_TYPE]) {
 364                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 365                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 366                         return -EINVAL;
 367         }
 368
 369         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 370                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 371                 int err = nla_parse_nested(kdt,
 372                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 373                                            tb[NL80211_KEY_DEFAULT_TYPES],
 374                                            nl80211_key_default_policy);
 375                 if (err)
 376                         return err;
 377
 378                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 379                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 380         }
 381
 382         return 0;
 383 }
 384
 385 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 386 {
 387         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 388                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 389                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 390         }
 391
 392         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 393                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 394                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 395         }
 396
 397         if (info->attrs[NL80211_ATTR_KEY_IDX])
 398                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 399
 400         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 401                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 402
 403         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 404         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 405
 406         if (k->def) {
 407                 k->def_uni = true;
 408                 k->def_multi = true;
 409         }
 410         if (k->defmgmt)
 411                 k->def_multi = true;
 412
 413         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 414                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 415                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 416                         return -EINVAL;
 417         }
 418
 419         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 420                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 421                 int err = nla_parse_nested(
 422                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 423                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 424                                 nl80211_key_default_policy);
 425                 if (err)
 426                         return err;
 427
 428                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 429                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 436 {
 437         int err;
 438
 439         memset(k, 0, sizeof(*k));
 440         k->idx = -1;
 441         k->type = -1;
 442
 443         if (info->attrs[NL80211_ATTR_KEY])
 444                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 445         else
 446                 err = nl80211_parse_key_old(info, k);
 447
 448         if (err)
 449                 return err;
 450
 451         if (k->def && k->defmgmt)
 452                 return -EINVAL;
 453
 454         if (k->defmgmt) {
 455                 if (k->def_uni || !k->def_multi)
 456                         return -EINVAL;
 457         }
 458
 459         if (k->idx != -1) {
 460                 if (k->defmgmt) {
 461                         if (k->idx < 4 || k->idx > 5)
 462                                 return -EINVAL;
 463                 } else if (k->def) {
 464                         if (k->idx < 0 || k->idx > 3)
 465                                 return -EINVAL;
 466                 } else {
 467                         if (k->idx < 0 || k->idx > 5)
 468                                 return -EINVAL;
 469                 }
 470         }
 471
 472         return 0;
 473 }
 474
 475 static struct cfg80211_cached_keys *
 476 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 477                        struct nlattr *keys)
 478 {
 479         struct key_parse parse;
 480         struct nlattr *key;
 481         struct cfg80211_cached_keys *result;
 482         int rem, err, def = 0;
 483
 484         result = kzalloc(sizeof(*result), GFP_KERNEL);
 485         if (!result)
 486                 return ERR_PTR(-ENOMEM);
 487
 488         result->def = -1;
 489         result->defmgmt = -1;
 490
 491         nla_for_each_nested(key, keys, rem) {
 492                 memset(&parse, 0, sizeof(parse));
 493                 parse.idx = -1;
 494
 495                 err = nl80211_parse_key_new(key, &parse);
 496                 if (err)
 497                         goto error;
 498                 err = -EINVAL;
 499                 if (!parse.p.key)
 500                         goto error;
 501                 if (parse.idx < 0 || parse.idx > 4)
 502                         goto error;
 503                 if (parse.def) {
 504                         if (def)
 505                                 goto error;
 506                         def = 1;
 507                         result->def = parse.idx;
 508                         if (!parse.def_uni || !parse.def_multi)
 509                                 goto error;
 510                 } else if (parse.defmgmt)
 511                         goto error;
 512                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 513                                                      parse.idx, false, NULL);
 514                 if (err)
 515                         goto error;
 516                 result->params[parse.idx].cipher = parse.p.cipher;
 517                 result->params[parse.idx].key_len = parse.p.key_len;
 518                 result->params[parse.idx].key = result->data[parse.idx];
 519                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 520         }
 521
 522         return result;
 523  error:
 524         kfree(result);
 525         return ERR_PTR(err);
 526 }
 527
 528 static int nl80211_key_allowed(struct wireless_dev *wdev)
 529 {
 530         ASSERT_WDEV_LOCK(wdev);
 531
 532         switch (wdev->iftype) {
 533         case NL80211_IFTYPE_AP:
 534         case NL80211_IFTYPE_AP_VLAN:
 535         case NL80211_IFTYPE_P2P_GO:
 536                 break;
 537         case NL80211_IFTYPE_ADHOC:
 538                 if (!wdev->current_bss)
 539                         return -ENOLINK;
 540                 break;
 541         case NL80211_IFTYPE_STATION:
 542         case NL80211_IFTYPE_P2P_CLIENT:
 543                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 544                         return -ENOLINK;
 545                 break;
 546         default:
 547                 return -EINVAL;
 548         }
 549
 550         return 0;
 551 }
 552
 553 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 554                               struct cfg80211_registered_device *dev)
 555 {
 556         void *hdr;
 557         struct nlattr *nl_bands, *nl_band;
 558         struct nlattr *nl_freqs, *nl_freq;
 559         struct nlattr *nl_rates, *nl_rate;
 560         struct nlattr *nl_modes;
 561         struct nlattr *nl_cmds;
 562         enum ieee80211_band band;
 563         struct ieee80211_channel *chan;
 564         struct ieee80211_rate *rate;
 565         int i;
 566         u16 ifmodes = dev->wiphy.interface_modes;
 567         const struct ieee80211_txrx_stypes *mgmt_stypes =
 568                                 dev->wiphy.mgmt_stypes;
 569
 570         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 571         if (!hdr)
 572                 return -1;
 573
 574         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 575         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 576
 577         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 578                     cfg80211_rdev_list_generation);
 579
 580         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 581                    dev->wiphy.retry_short);
 582         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 583                    dev->wiphy.retry_long);
 584         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 585                     dev->wiphy.frag_threshold);
 586         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 587                     dev->wiphy.rts_threshold);
 588         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 589                     dev->wiphy.coverage_class);
 590         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 591                    dev->wiphy.max_scan_ssids);
 592         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 593                     dev->wiphy.max_scan_ie_len);
 594
 595         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 596                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 597
 598         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 599                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 600                 dev->wiphy.cipher_suites);
 601
 602         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 603                    dev->wiphy.max_num_pmkids);
 604
 605         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 606                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 607
 608         if (dev->wiphy.available_antennas && dev->ops->get_antenna) {
 609                 u32 tx_ant = 0, rx_ant = 0;
 610                 int res;
 611                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 612                 if (!res) {
 613                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 614                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 615                 }
 616         }
 617
 618         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 619         if (!nl_modes)
 620                 goto nla_put_failure;
 621
 622         i = 0;
 623         while (ifmodes) {
 624                 if (ifmodes & 1)
 625                         NLA_PUT_FLAG(msg, i);
 626                 ifmodes >>= 1;
 627                 i++;
 628         }
 629
 630         nla_nest_end(msg, nl_modes);
 631
 632         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 633         if (!nl_bands)
 634                 goto nla_put_failure;
 635
 636         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 637                 if (!dev->wiphy.bands[band])
 638                         continue;
 639
 640                 nl_band = nla_nest_start(msg, band);
 641                 if (!nl_band)
 642                         goto nla_put_failure;
 643
 644                 /* add HT info */
 645                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 646                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 647                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 648                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 649                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 650                                 dev->wiphy.bands[band]->ht_cap.cap);
 651                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 652                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 653                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 654                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 655                 }
 656
 657                 /* add frequencies */
 658                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 659                 if (!nl_freqs)
 660                         goto nla_put_failure;
 661
 662                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 663                         nl_freq = nla_nest_start(msg, i);
 664                         if (!nl_freq)
 665                                 goto nla_put_failure;
 666
 667                         chan = &dev->wiphy.bands[band]->channels[i];
 668
 669                         if (nl80211_msg_put_channel(msg, chan))
 670                                 goto nla_put_failure;
 671
 672                         nla_nest_end(msg, nl_freq);
 673                 }
 674
 675                 nla_nest_end(msg, nl_freqs);
 676
 677                 /* add bitrates */
 678                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 679                 if (!nl_rates)
 680                         goto nla_put_failure;
 681
 682                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 683                         nl_rate = nla_nest_start(msg, i);
 684                         if (!nl_rate)
 685                                 goto nla_put_failure;
 686
 687                         rate = &dev->wiphy.bands[band]->bitrates[i];
 688                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 689                                     rate->bitrate);
 690                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 691                                 NLA_PUT_FLAG(msg,
 692                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 693
 694                         nla_nest_end(msg, nl_rate);
 695                 }
 696
 697                 nla_nest_end(msg, nl_rates);
 698
 699                 nla_nest_end(msg, nl_band);
 700         }
 701         nla_nest_end(msg, nl_bands);
 702
 703         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 704         if (!nl_cmds)
 705                 goto nla_put_failure;
 706
 707         i = 0;
 708 #define CMD(op, n)                                              \
 709          do {                                                   \
 710                 if (dev->ops->op) {                             \
 711                         i++;                                    \
 712                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 713                 }                                               \
 714         } while (0)
 715
 716         CMD(add_virtual_intf, NEW_INTERFACE);
 717         CMD(change_virtual_intf, SET_INTERFACE);
 718         CMD(add_key, NEW_KEY);
 719         CMD(add_beacon, NEW_BEACON);
 720         CMD(add_station, NEW_STATION);
 721         CMD(add_mpath, NEW_MPATH);
 722         CMD(update_mesh_params, SET_MESH_PARAMS);
 723         CMD(change_bss, SET_BSS);
 724         CMD(auth, AUTHENTICATE);
 725         CMD(assoc, ASSOCIATE);
 726         CMD(deauth, DEAUTHENTICATE);
 727         CMD(disassoc, DISASSOCIATE);
 728         CMD(join_ibss, JOIN_IBSS);
 729         CMD(join_mesh, JOIN_MESH);
 730         CMD(set_pmksa, SET_PMKSA);
 731         CMD(del_pmksa, DEL_PMKSA);
 732         CMD(flush_pmksa, FLUSH_PMKSA);
 733         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 734         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 735         CMD(mgmt_tx, FRAME);
 736         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 737         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 738                 i++;
 739                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 740         }
 741         CMD(set_channel, SET_CHANNEL);
 742         CMD(set_wds_peer, SET_WDS_PEER);
 743
 744 #undef CMD
 745
 746         if (dev->ops->connect || dev->ops->auth) {
 747                 i++;
 748                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 749         }
 750
 751         if (dev->ops->disconnect || dev->ops->deauth) {
 752                 i++;
 753                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 754         }
 755
 756         nla_nest_end(msg, nl_cmds);
 757
 758         /* for now at least assume all drivers have it */
 759         if (dev->ops->mgmt_tx)
 760                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 761
 762         if (mgmt_stypes) {
 763                 u16 stypes;
 764                 struct nlattr *nl_ftypes, *nl_ifs;
 765                 enum nl80211_iftype ift;
 766
 767                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 768                 if (!nl_ifs)
 769                         goto nla_put_failure;
 770
 771                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 772                         nl_ftypes = nla_nest_start(msg, ift);
 773                         if (!nl_ftypes)
 774                                 goto nla_put_failure;
 775                         i = 0;
 776                         stypes = mgmt_stypes[ift].tx;
 777                         while (stypes) {
 778                                 if (stypes & 1)
 779                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 780                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 781                                 stypes >>= 1;
 782                                 i++;
 783                         }
 784                         nla_nest_end(msg, nl_ftypes);
 785                 }
 786
 787                 nla_nest_end(msg, nl_ifs);
 788
 789                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 790                 if (!nl_ifs)
 791                         goto nla_put_failure;
 792
 793                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 794                         nl_ftypes = nla_nest_start(msg, ift);
 795                         if (!nl_ftypes)
 796                                 goto nla_put_failure;
 797                         i = 0;
 798                         stypes = mgmt_stypes[ift].rx;
 799                         while (stypes) {
 800                                 if (stypes & 1)
 801                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 802                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 803                                 stypes >>= 1;
 804                                 i++;
 805                         }
 806                         nla_nest_end(msg, nl_ftypes);
 807                 }
 808                 nla_nest_end(msg, nl_ifs);
 809         }
 810
 811         return genlmsg_end(msg, hdr);
 812
 813  nla_put_failure:
 814         genlmsg_cancel(msg, hdr);
 815         return -EMSGSIZE;
 816 }
 817
 818 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 819 {
 820         int idx = 0;
 821         int start = cb->args[0];
 822         struct cfg80211_registered_device *dev;
 823
 824         mutex_lock(&cfg80211_mutex);
 825         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 826                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 827                         continue;
 828                 if (++idx <= start)
 829                         continue;
 830                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 831                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 832                                        dev) < 0) {
 833                         idx--;
 834                         break;
 835                 }
 836         }
 837         mutex_unlock(&cfg80211_mutex);
 838
 839         cb->args[0] = idx;
 840
 841         return skb->len;
 842 }
 843
 844 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 845 {
 846         struct sk_buff *msg;
 847         struct cfg80211_registered_device *dev = info->user_ptr[0];
 848
 849         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 850         if (!msg)
 851                 return -ENOMEM;
 852
 853         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 854                 nlmsg_free(msg);
 855                 return -ENOBUFS;
 856         }
 857
 858         return genlmsg_reply(msg, info);
 859 }
 860
 861 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 862         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 863         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 864         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 865         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 866         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 867 };
 868
 869 static int parse_txq_params(struct nlattr *tb[],
 870                             struct ieee80211_txq_params *txq_params)
 871 {
 872         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 873             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 874             !tb[NL80211_TXQ_ATTR_AIFS])
 875                 return -EINVAL;
 876
 877         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 878         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 879         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 880         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 881         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 882
 883         return 0;
 884 }
 885
 886 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 887 {
 888         /*
 889          * You can only set the channel explicitly for AP, mesh
 890          * and WDS type interfaces; all others have their channel
 891          * managed via their respective "establish a connection"
 892          * command (connect, join, ...)
 893          *
 894          * Monitors are special as they are normally slaved to
 895          * whatever else is going on, so they behave as though
 896          * you tried setting the wiphy channel itself.
 897          */
 898         return !wdev ||
 899                 wdev->iftype == NL80211_IFTYPE_AP ||
 900                 wdev->iftype == NL80211_IFTYPE_WDS ||
 901                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 902                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
 903                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
 904 }
 905
 906 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 907                                  struct wireless_dev *wdev,
 908                                  struct genl_info *info)
 909 {
 910         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 911         u32 freq;
 912         int result;
 913
 914         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 915                 return -EINVAL;
 916
 917         if (!nl80211_can_set_dev_channel(wdev))
 918                 return -EOPNOTSUPP;
 919
 920         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 921                 channel_type = nla_get_u32(info->attrs[
 922                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 923                 if (channel_type != NL80211_CHAN_NO_HT &&
 924                     channel_type != NL80211_CHAN_HT20 &&
 925                     channel_type != NL80211_CHAN_HT40PLUS &&
 926                     channel_type != NL80211_CHAN_HT40MINUS)
 927                         return -EINVAL;
 928         }
 929
 930         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 931
 932         mutex_lock(&rdev->devlist_mtx);
 933         if (wdev) {
 934                 wdev_lock(wdev);
 935                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 936                 wdev_unlock(wdev);
 937         } else {
 938                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 939         }
 940         mutex_unlock(&rdev->devlist_mtx);
 941
 942         return result;
 943 }
 944
 945 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 946 {
 947         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 948         struct net_device *netdev = info->user_ptr[1];
 949
 950         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 951 }
 952
 953 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
 954 {
 955         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 956         struct net_device *dev = info->user_ptr[1];
 957         struct wireless_dev *wdev = dev->ieee80211_ptr;
 958         const u8 *bssid;
 959
 960         if (!info->attrs[NL80211_ATTR_MAC])
 961                 return -EINVAL;
 962
 963         if (netif_running(dev))
 964                 return -EBUSY;
 965
 966         if (!rdev->ops->set_wds_peer)
 967                 return -EOPNOTSUPP;
 968
 969         if (wdev->iftype != NL80211_IFTYPE_WDS)
 970                 return -EOPNOTSUPP;
 971
 972         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 973         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
 974 }
 975
 976
 977 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 978 {
 979         struct cfg80211_registered_device *rdev;
 980         struct net_device *netdev = NULL;
 981         struct wireless_dev *wdev;
 982         int result = 0, rem_txq_params = 0;
 983         struct nlattr *nl_txq_params;
 984         u32 changed;
 985         u8 retry_short = 0, retry_long = 0;
 986         u32 frag_threshold = 0, rts_threshold = 0;
 987         u8 coverage_class = 0;
 988
 989         /*
 990          * Try to find the wiphy and netdev. Normally this
 991          * function shouldn't need the netdev, but this is
 992          * done for backward compatibility -- previously
 993          * setting the channel was done per wiphy, but now
 994          * it is per netdev. Previous userland like hostapd
 995          * also passed a netdev to set_wiphy, so that it is
 996          * possible to let that go to the right netdev!
 997          */
 998         mutex_lock(&cfg80211_mutex);
 999
1000         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1001                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1002
1003                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1004                 if (netdev && netdev->ieee80211_ptr) {
1005                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1006                         mutex_lock(&rdev->mtx);
1007                 } else
1008                         netdev = NULL;
1009         }
1010
1011         if (!netdev) {
1012                 rdev = __cfg80211_rdev_from_info(info);
1013                 if (IS_ERR(rdev)) {
1014                         mutex_unlock(&cfg80211_mutex);
1015                         return PTR_ERR(rdev);
1016                 }
1017                 wdev = NULL;
1018                 netdev = NULL;
1019                 result = 0;
1020
1021                 mutex_lock(&rdev->mtx);
1022         } else if (netif_running(netdev) &&
1023                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1024                 wdev = netdev->ieee80211_ptr;
1025         else
1026                 wdev = NULL;
1027
1028         /*
1029          * end workaround code, by now the rdev is available
1030          * and locked, and wdev may or may not be NULL.
1031          */
1032
1033         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1034                 result = cfg80211_dev_rename(
1035                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1036
1037         mutex_unlock(&cfg80211_mutex);
1038
1039         if (result)
1040                 goto bad_res;
1041
1042         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1043                 struct ieee80211_txq_params txq_params;
1044                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1045
1046                 if (!rdev->ops->set_txq_params) {
1047                         result = -EOPNOTSUPP;
1048                         goto bad_res;
1049                 }
1050
1051                 nla_for_each_nested(nl_txq_params,
1052                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1053                                     rem_txq_params) {
1054                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1055                                   nla_data(nl_txq_params),
1056                                   nla_len(nl_txq_params),
1057                                   txq_params_policy);
1058                         result = parse_txq_params(tb, &txq_params);
1059                         if (result)
1060                                 goto bad_res;
1061
1062                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1063                                                            &txq_params);
1064                         if (result)
1065                                 goto bad_res;
1066                 }
1067         }
1068
1069         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1070                 result = __nl80211_set_channel(rdev, wdev, info);
1071                 if (result)
1072                         goto bad_res;
1073         }
1074
1075         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1076                 enum nl80211_tx_power_setting type;
1077                 int idx, mbm = 0;
1078
1079                 if (!rdev->ops->set_tx_power) {
1080                         result = -EOPNOTSUPP;
1081                         goto bad_res;
1082                 }
1083
1084                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1085                 type = nla_get_u32(info->attrs[idx]);
1086
1087                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1088                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1089                         result = -EINVAL;
1090                         goto bad_res;
1091                 }
1092
1093                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1094                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1095                         mbm = nla_get_u32(info->attrs[idx]);
1096                 }
1097
1098                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1099                 if (result)
1100                         goto bad_res;
1101         }
1102
1103         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1104             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1105                 u32 tx_ant, rx_ant;
1106                 if (!rdev->wiphy.available_antennas || !rdev->ops->set_antenna) {
1107                         result = -EOPNOTSUPP;
1108                         goto bad_res;
1109                 }
1110
1111                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1112                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1113
1114                 /* reject antenna configurations which don't match the
1115                  * available antenna mask, except for the "all" mask */
1116                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas)) ||
1117                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas))) {
1118                         result = -EINVAL;
1119                         goto bad_res;
1120                 }
1121
1122                 tx_ant = tx_ant & rdev->wiphy.available_antennas;
1123                 rx_ant = rx_ant & rdev->wiphy.available_antennas;
1124
1125                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1126                 if (result)
1127                         goto bad_res;
1128         }
1129
1130         changed = 0;
1131
1132         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1133                 retry_short = nla_get_u8(
1134                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1135                 if (retry_short == 0) {
1136                         result = -EINVAL;
1137                         goto bad_res;
1138                 }
1139                 changed |= WIPHY_PARAM_RETRY_SHORT;
1140         }
1141
1142         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1143                 retry_long = nla_get_u8(
1144                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1145                 if (retry_long == 0) {
1146                         result = -EINVAL;
1147                         goto bad_res;
1148                 }
1149                 changed |= WIPHY_PARAM_RETRY_LONG;
1150         }
1151
1152         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1153                 frag_threshold = nla_get_u32(
1154                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1155                 if (frag_threshold < 256) {
1156                         result = -EINVAL;
1157                         goto bad_res;
1158                 }
1159                 if (frag_threshold != (u32) -1) {
1160                         /*
1161                          * Fragments (apart from the last one) are required to
1162                          * have even length. Make the fragmentation code
1163                          * simpler by stripping LSB should someone try to use
1164                          * odd threshold value.
1165                          */
1166                         frag_threshold &= ~0x1;
1167                 }
1168                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1169         }
1170
1171         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1172                 rts_threshold = nla_get_u32(
1173                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1174                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1175         }
1176
1177         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1178                 coverage_class = nla_get_u8(
1179                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1180                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1181         }
1182
1183         if (changed) {
1184                 u8 old_retry_short, old_retry_long;
1185                 u32 old_frag_threshold, old_rts_threshold;
1186                 u8 old_coverage_class;
1187
1188                 if (!rdev->ops->set_wiphy_params) {
1189                         result = -EOPNOTSUPP;
1190                         goto bad_res;
1191                 }
1192
1193                 old_retry_short = rdev->wiphy.retry_short;
1194                 old_retry_long = rdev->wiphy.retry_long;
1195                 old_frag_threshold = rdev->wiphy.frag_threshold;
1196                 old_rts_threshold = rdev->wiphy.rts_threshold;
1197                 old_coverage_class = rdev->wiphy.coverage_class;
1198
1199                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1200                         rdev->wiphy.retry_short = retry_short;
1201                 if (changed & WIPHY_PARAM_RETRY_LONG)
1202                         rdev->wiphy.retry_long = retry_long;
1203                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1204                         rdev->wiphy.frag_threshold = frag_threshold;
1205                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1206                         rdev->wiphy.rts_threshold = rts_threshold;
1207                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1208                         rdev->wiphy.coverage_class = coverage_class;
1209
1210                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1211                 if (result) {
1212                         rdev->wiphy.retry_short = old_retry_short;
1213                         rdev->wiphy.retry_long = old_retry_long;
1214                         rdev->wiphy.frag_threshold = old_frag_threshold;
1215                         rdev->wiphy.rts_threshold = old_rts_threshold;
1216                         rdev->wiphy.coverage_class = old_coverage_class;
1217                 }
1218         }
1219
1220  bad_res:
1221         mutex_unlock(&rdev->mtx);
1222         if (netdev)
1223                 dev_put(netdev);
1224         return result;
1225 }
1226
1227
1228 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1229                               struct cfg80211_registered_device *rdev,
1230                               struct net_device *dev)
1231 {
1232         void *hdr;
1233
1234         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1235         if (!hdr)
1236                 return -1;
1237
1238         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1239         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1240         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1241         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1242
1243         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1244                     rdev->devlist_generation ^
1245                         (cfg80211_rdev_list_generation << 2));
1246
1247         return genlmsg_end(msg, hdr);
1248
1249  nla_put_failure:
1250         genlmsg_cancel(msg, hdr);
1251         return -EMSGSIZE;
1252 }
1253
1254 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1255 {
1256         int wp_idx = 0;
1257         int if_idx = 0;
1258         int wp_start = cb->args[0];
1259         int if_start = cb->args[1];
1260         struct cfg80211_registered_device *rdev;
1261         struct wireless_dev *wdev;
1262
1263         mutex_lock(&cfg80211_mutex);
1264         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1265                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1266                         continue;
1267                 if (wp_idx < wp_start) {
1268                         wp_idx++;
1269                         continue;
1270                 }
1271                 if_idx = 0;
1272
1273                 mutex_lock(&rdev->devlist_mtx);
1274                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1275                         if (if_idx < if_start) {
1276                                 if_idx++;
1277                                 continue;
1278                         }
1279                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1280                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1281                                                rdev, wdev->netdev) < 0) {
1282                                 mutex_unlock(&rdev->devlist_mtx);
1283                                 goto out;
1284                         }
1285                         if_idx++;
1286                 }
1287                 mutex_unlock(&rdev->devlist_mtx);
1288
1289                 wp_idx++;
1290         }
1291  out:
1292         mutex_unlock(&cfg80211_mutex);
1293
1294         cb->args[0] = wp_idx;
1295         cb->args[1] = if_idx;
1296
1297         return skb->len;
1298 }
1299
1300 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1301 {
1302         struct sk_buff *msg;
1303         struct cfg80211_registered_device *dev = info->user_ptr[0];
1304         struct net_device *netdev = info->user_ptr[1];
1305
1306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1307         if (!msg)
1308                 return -ENOMEM;
1309
1310         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1311                                dev, netdev) < 0) {
1312                 nlmsg_free(msg);
1313                 return -ENOBUFS;
1314         }
1315
1316         return genlmsg_reply(msg, info);
1317 }
1318
1319 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1320         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1321         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1322         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1323         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1324         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1325 };
1326
1327 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1328 {
1329         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1330         int flag;
1331
1332         *mntrflags = 0;
1333
1334         if (!nla)
1335                 return -EINVAL;
1336
1337         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1338                              nla, mntr_flags_policy))
1339                 return -EINVAL;
1340
1341         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1342                 if (flags[flag])
1343                         *mntrflags |= (1<<flag);
1344
1345         return 0;
1346 }
1347
1348 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1349                                struct net_device *netdev, u8 use_4addr,
1350                                enum nl80211_iftype iftype)
1351 {
1352         if (!use_4addr) {
1353                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1354                         return -EBUSY;
1355                 return 0;
1356         }
1357
1358         switch (iftype) {
1359         case NL80211_IFTYPE_AP_VLAN:
1360                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1361                         return 0;
1362                 break;
1363         case NL80211_IFTYPE_STATION:
1364                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1365                         return 0;
1366                 break;
1367         default:
1368                 break;
1369         }
1370
1371         return -EOPNOTSUPP;
1372 }
1373
1374 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1375 {
1376         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1377         struct vif_params params;
1378         int err;
1379         enum nl80211_iftype otype, ntype;
1380         struct net_device *dev = info->user_ptr[1];
1381         u32 _flags, *flags = NULL;
1382         bool change = false;
1383
1384         memset(&params, 0, sizeof(params));
1385
1386         otype = ntype = dev->ieee80211_ptr->iftype;
1387
1388         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1389                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1390                 if (otype != ntype)
1391                         change = true;
1392                 if (ntype > NL80211_IFTYPE_MAX)
1393                         return -EINVAL;
1394         }
1395
1396         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1397                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1398
1399                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1400                         return -EINVAL;
1401                 if (netif_running(dev))
1402                         return -EBUSY;
1403
1404                 wdev_lock(wdev);
1405                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1406                              IEEE80211_MAX_MESH_ID_LEN);
1407                 wdev->mesh_id_up_len =
1408                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1409                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1410                        wdev->mesh_id_up_len);
1411                 wdev_unlock(wdev);
1412         }
1413
1414         if (info->attrs[NL80211_ATTR_4ADDR]) {
1415                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1416                 change = true;
1417                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1418                 if (err)
1419                         return err;
1420         } else {
1421                 params.use_4addr = -1;
1422         }
1423
1424         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1425                 if (ntype != NL80211_IFTYPE_MONITOR)
1426                         return -EINVAL;
1427                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1428                                           &_flags);
1429                 if (err)
1430                         return err;
1431
1432                 flags = &_flags;
1433                 change = true;
1434         }
1435
1436         if (change)
1437                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1438         else
1439                 err = 0;
1440
1441         if (!err && params.use_4addr != -1)
1442                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1443
1444         return err;
1445 }
1446
1447 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1448 {
1449         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1450         struct vif_params params;
1451         struct net_device *dev;
1452         int err;
1453         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1454         u32 flags;
1455
1456         memset(&params, 0, sizeof(params));
1457
1458         if (!info->attrs[NL80211_ATTR_IFNAME])
1459                 return -EINVAL;
1460
1461         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1462                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1463                 if (type > NL80211_IFTYPE_MAX)
1464                         return -EINVAL;
1465         }
1466
1467         if (!rdev->ops->add_virtual_intf ||
1468             !(rdev->wiphy.interface_modes & (1 << type)))
1469                 return -EOPNOTSUPP;
1470
1471         if (info->attrs[NL80211_ATTR_4ADDR]) {
1472                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1473                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1474                 if (err)
1475                         return err;
1476         }
1477
1478         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1479                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1480                                   &flags);
1481         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1482                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1483                 type, err ? NULL : &flags, &params);
1484         if (IS_ERR(dev))
1485                 return PTR_ERR(dev);
1486
1487         if (type == NL80211_IFTYPE_MESH_POINT &&
1488             info->attrs[NL80211_ATTR_MESH_ID]) {
1489                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1490
1491                 wdev_lock(wdev);
1492                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1493                              IEEE80211_MAX_MESH_ID_LEN);
1494                 wdev->mesh_id_up_len =
1495                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1496                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1497                        wdev->mesh_id_up_len);
1498                 wdev_unlock(wdev);
1499         }
1500
1501         return 0;
1502 }
1503
1504 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1505 {
1506         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1507         struct net_device *dev = info->user_ptr[1];
1508
1509         if (!rdev->ops->del_virtual_intf)
1510                 return -EOPNOTSUPP;
1511
1512         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1513 }
1514
1515 struct get_key_cookie {
1516         struct sk_buff *msg;
1517         int error;
1518         int idx;
1519 };
1520
1521 static void get_key_callback(void *c, struct key_params *params)
1522 {
1523         struct nlattr *key;
1524         struct get_key_cookie *cookie = c;
1525
1526         if (params->key)
1527                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1528                         params->key_len, params->key);
1529
1530         if (params->seq)
1531                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1532                         params->seq_len, params->seq);
1533
1534         if (params->cipher)
1535                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1536                             params->cipher);
1537
1538         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1539         if (!key)
1540                 goto nla_put_failure;
1541
1542         if (params->key)
1543                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1544                         params->key_len, params->key);
1545
1546         if (params->seq)
1547                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1548                         params->seq_len, params->seq);
1549
1550         if (params->cipher)
1551                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1552                             params->cipher);
1553
1554         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1555
1556         nla_nest_end(cookie->msg, key);
1557
1558         return;
1559  nla_put_failure:
1560         cookie->error = 1;
1561 }
1562
1563 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1564 {
1565         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1566         int err;
1567         struct net_device *dev = info->user_ptr[1];
1568         u8 key_idx = 0;
1569         const u8 *mac_addr = NULL;
1570         bool pairwise;
1571         struct get_key_cookie cookie = {
1572                 .error = 0,
1573         };
1574         void *hdr;
1575         struct sk_buff *msg;
1576
1577         if (info->attrs[NL80211_ATTR_KEY_IDX])
1578                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1579
1580         if (key_idx > 5)
1581                 return -EINVAL;
1582
1583         if (info->attrs[NL80211_ATTR_MAC])
1584                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1585
1586         pairwise = !!mac_addr;
1587         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1588                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1589                 if (kt >= NUM_NL80211_KEYTYPES)
1590                         return -EINVAL;
1591                 if (kt != NL80211_KEYTYPE_GROUP &&
1592                     kt != NL80211_KEYTYPE_PAIRWISE)
1593                         return -EINVAL;
1594                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1595         }
1596
1597         if (!rdev->ops->get_key)
1598                 return -EOPNOTSUPP;
1599
1600         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1601         if (!msg)
1602                 return -ENOMEM;
1603
1604         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1605                              NL80211_CMD_NEW_KEY);
1606         if (IS_ERR(hdr))
1607                 return PTR_ERR(hdr);
1608
1609         cookie.msg = msg;
1610         cookie.idx = key_idx;
1611
1612         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1613         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1614         if (mac_addr)
1615                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1616
1617         if (pairwise && mac_addr &&
1618             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1619                 return -ENOENT;
1620
1621         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1622                                  mac_addr, &cookie, get_key_callback);
1623
1624         if (err)
1625                 goto free_msg;
1626
1627         if (cookie.error)
1628                 goto nla_put_failure;
1629
1630         genlmsg_end(msg, hdr);
1631         return genlmsg_reply(msg, info);
1632
1633  nla_put_failure:
1634         err = -ENOBUFS;
1635  free_msg:
1636         nlmsg_free(msg);
1637         return err;
1638 }
1639
1640 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1641 {
1642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1643         struct key_parse key;
1644         int err;
1645         struct net_device *dev = info->user_ptr[1];
1646
1647         err = nl80211_parse_key(info, &key);
1648         if (err)
1649                 return err;
1650
1651         if (key.idx < 0)
1652                 return -EINVAL;
1653
1654         /* only support setting default key */
1655         if (!key.def && !key.defmgmt)
1656                 return -EINVAL;
1657
1658         wdev_lock(dev->ieee80211_ptr);
1659
1660         if (key.def) {
1661                 if (!rdev->ops->set_default_key) {
1662                         err = -EOPNOTSUPP;
1663                         goto out;
1664                 }
1665
1666                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1667                 if (err)
1668                         goto out;
1669
1670                 if (!(rdev->wiphy.flags &
1671                                 WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS)) {
1672                         if (!key.def_uni || !key.def_multi) {
1673                                 err = -EOPNOTSUPP;
1674                                 goto out;
1675                         }
1676                 }
1677
1678                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1679                                                  key.def_uni, key.def_multi);
1680
1681                 if (err)
1682                         goto out;
1683
1684 #ifdef CONFIG_CFG80211_WEXT
1685                 dev->ieee80211_ptr->wext.default_key = key.idx;
1686 #endif
1687         } else {
1688                 if (key.def_uni || !key.def_multi) {
1689                         err = -EINVAL;
1690                         goto out;
1691                 }
1692
1693                 if (!rdev->ops->set_default_mgmt_key) {
1694                         err = -EOPNOTSUPP;
1695                         goto out;
1696                 }
1697
1698                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1699                 if (err)
1700                         goto out;
1701
1702                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1703                                                       dev, key.idx);
1704                 if (err)
1705                         goto out;
1706
1707 #ifdef CONFIG_CFG80211_WEXT
1708                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1709 #endif
1710         }
1711
1712  out:
1713         wdev_unlock(dev->ieee80211_ptr);
1714
1715         return err;
1716 }
1717
1718 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1719 {
1720         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1721         int err;
1722         struct net_device *dev = info->user_ptr[1];
1723         struct key_parse key;
1724         const u8 *mac_addr = NULL;
1725
1726         err = nl80211_parse_key(info, &key);
1727         if (err)
1728                 return err;
1729
1730         if (!key.p.key)
1731                 return -EINVAL;
1732
1733         if (info->attrs[NL80211_ATTR_MAC])
1734                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1735
1736         if (key.type == -1) {
1737                 if (mac_addr)
1738                         key.type = NL80211_KEYTYPE_PAIRWISE;
1739                 else
1740                         key.type = NL80211_KEYTYPE_GROUP;
1741         }
1742
1743         /* for now */
1744         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1745             key.type != NL80211_KEYTYPE_GROUP)
1746                 return -EINVAL;
1747
1748         if (!rdev->ops->add_key)
1749                 return -EOPNOTSUPP;
1750
1751         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1752                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1753                                            mac_addr))
1754                 return -EINVAL;
1755
1756         wdev_lock(dev->ieee80211_ptr);
1757         err = nl80211_key_allowed(dev->ieee80211_ptr);
1758         if (!err)
1759                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1760                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1761                                          mac_addr, &key.p);
1762         wdev_unlock(dev->ieee80211_ptr);
1763
1764         return err;
1765 }
1766
1767 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1768 {
1769         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1770         int err;
1771         struct net_device *dev = info->user_ptr[1];
1772         u8 *mac_addr = NULL;
1773         struct key_parse key;
1774
1775         err = nl80211_parse_key(info, &key);
1776         if (err)
1777                 return err;
1778
1779         if (info->attrs[NL80211_ATTR_MAC])
1780                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1781
1782         if (key.type == -1) {
1783                 if (mac_addr)
1784                         key.type = NL80211_KEYTYPE_PAIRWISE;
1785                 else
1786                         key.type = NL80211_KEYTYPE_GROUP;
1787         }
1788
1789         /* for now */
1790         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1791             key.type != NL80211_KEYTYPE_GROUP)
1792                 return -EINVAL;
1793
1794         if (!rdev->ops->del_key)
1795                 return -EOPNOTSUPP;
1796
1797         wdev_lock(dev->ieee80211_ptr);
1798         err = nl80211_key_allowed(dev->ieee80211_ptr);
1799
1800         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1801             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1802                 err = -ENOENT;
1803
1804         if (!err)
1805                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1806                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1807                                          mac_addr);
1808
1809 #ifdef CONFIG_CFG80211_WEXT
1810         if (!err) {
1811                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1812                         dev->ieee80211_ptr->wext.default_key = -1;
1813                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1814                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1815         }
1816 #endif
1817         wdev_unlock(dev->ieee80211_ptr);
1818
1819         return err;
1820 }
1821
1822 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1823 {
1824         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1825                     struct beacon_parameters *info);
1826         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1827         struct net_device *dev = info->user_ptr[1];
1828         struct beacon_parameters params;
1829         int haveinfo = 0;
1830
1831         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1832                 return -EINVAL;
1833
1834         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1835             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1836                 return -EOPNOTSUPP;
1837
1838         switch (info->genlhdr->cmd) {
1839         case NL80211_CMD_NEW_BEACON:
1840                 /* these are required for NEW_BEACON */
1841                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1842                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1843                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1844                         return -EINVAL;
1845
1846                 call = rdev->ops->add_beacon;
1847                 break;
1848         case NL80211_CMD_SET_BEACON:
1849                 call = rdev->ops->set_beacon;
1850                 break;
1851         default:
1852                 WARN_ON(1);
1853                 return -EOPNOTSUPP;
1854         }
1855
1856         if (!call)
1857                 return -EOPNOTSUPP;
1858
1859         memset(&params, 0, sizeof(params));
1860
1861         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1862                 params.interval =
1863                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1864                 haveinfo = 1;
1865         }
1866
1867         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1868                 params.dtim_period =
1869                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1870                 haveinfo = 1;
1871         }
1872
1873         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1874                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1875                 params.head_len =
1876                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1877                 haveinfo = 1;
1878         }
1879
1880         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1881                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1882                 params.tail_len =
1883                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1884                 haveinfo = 1;
1885         }
1886
1887         if (!haveinfo)
1888                 return -EINVAL;
1889
1890         return call(&rdev->wiphy, dev, &params);
1891 }
1892
1893 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1894 {
1895         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1896         struct net_device *dev = info->user_ptr[1];
1897
1898         if (!rdev->ops->del_beacon)
1899                 return -EOPNOTSUPP;
1900
1901         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1902             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1903                 return -EOPNOTSUPP;
1904
1905         return rdev->ops->del_beacon(&rdev->wiphy, dev);
1906 }
1907
1908 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1909         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1910         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1911         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1912         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1913 };
1914
1915 static int parse_station_flags(struct genl_info *info,
1916                                struct station_parameters *params)
1917 {
1918         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1919         struct nlattr *nla;
1920         int flag;
1921
1922         /*
1923          * Try parsing the new attribute first so userspace
1924          * can specify both for older kernels.
1925          */
1926         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1927         if (nla) {
1928                 struct nl80211_sta_flag_update *sta_flags;
1929
1930                 sta_flags = nla_data(nla);
1931                 params->sta_flags_mask = sta_flags->mask;
1932                 params->sta_flags_set = sta_flags->set;
1933                 if ((params->sta_flags_mask |
1934                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1935                         return -EINVAL;
1936                 return 0;
1937         }
1938
1939         /* if present, parse the old attribute */
1940
1941         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1942         if (!nla)
1943                 return 0;
1944
1945         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1946                              nla, sta_flags_policy))
1947                 return -EINVAL;
1948
1949         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1950         params->sta_flags_mask &= ~1;
1951
1952         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1953                 if (flags[flag])
1954                         params->sta_flags_set |= (1<<flag);
1955
1956         return 0;
1957 }
1958
1959 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1960                                 int flags, struct net_device *dev,
1961                                 const u8 *mac_addr, struct station_info *sinfo)
1962 {
1963         void *hdr;
1964         struct nlattr *sinfoattr, *txrate;
1965         u16 bitrate;
1966
1967         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1968         if (!hdr)
1969                 return -1;
1970
1971         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1972         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1973
1974         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1975
1976         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1977         if (!sinfoattr)
1978                 goto nla_put_failure;
1979         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1980                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1981                             sinfo->inactive_time);
1982         if (sinfo->filled & STATION_INFO_RX_BYTES)
1983                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1984                             sinfo->rx_bytes);
1985         if (sinfo->filled & STATION_INFO_TX_BYTES)
1986                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1987                             sinfo->tx_bytes);
1988         if (sinfo->filled & STATION_INFO_LLID)
1989                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1990                             sinfo->llid);
1991         if (sinfo->filled & STATION_INFO_PLID)
1992                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1993                             sinfo->plid);
1994         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1995                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1996                             sinfo->plink_state);
1997         if (sinfo->filled & STATION_INFO_SIGNAL)
1998                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1999                            sinfo->signal);
2000         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2001                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2002                            sinfo->signal_avg);
2003         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2004                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
2005                 if (!txrate)
2006                         goto nla_put_failure;
2007
2008                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2009                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
2010                 if (bitrate > 0)
2011                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2012
2013                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
2014                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
2015                                     sinfo->txrate.mcs);
2016                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2017                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2018                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
2019                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2020
2021                 nla_nest_end(msg, txrate);
2022         }
2023         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2024                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2025                             sinfo->rx_packets);
2026         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2027                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2028                             sinfo->tx_packets);
2029         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2030                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2031                             sinfo->tx_retries);
2032         if (sinfo->filled & STATION_INFO_TX_FAILED)
2033                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2034                             sinfo->tx_failed);
2035         nla_nest_end(msg, sinfoattr);
2036
2037         return genlmsg_end(msg, hdr);
2038
2039  nla_put_failure:
2040         genlmsg_cancel(msg, hdr);
2041         return -EMSGSIZE;
2042 }
2043
2044 static int nl80211_dump_station(struct sk_buff *skb,
2045                                 struct netlink_callback *cb)
2046 {
2047         struct station_info sinfo;
2048         struct cfg80211_registered_device *dev;
2049         struct net_device *netdev;
2050         u8 mac_addr[ETH_ALEN];
2051         int sta_idx = cb->args[1];
2052         int err;
2053
2054         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2055         if (err)
2056                 return err;
2057
2058         if (!dev->ops->dump_station) {
2059                 err = -EOPNOTSUPP;
2060                 goto out_err;
2061         }
2062
2063         while (1) {
2064                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2065                                              mac_addr, &sinfo);
2066                 if (err == -ENOENT)
2067                         break;
2068                 if (err)
2069                         goto out_err;
2070
2071                 if (nl80211_send_station(skb,
2072                                 NETLINK_CB(cb->skb).pid,
2073                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2074                                 netdev, mac_addr,
2075                                 &sinfo) < 0)
2076                         goto out;
2077
2078                 sta_idx++;
2079         }
2080
2081
2082  out:
2083         cb->args[1] = sta_idx;
2084         err = skb->len;
2085  out_err:
2086         nl80211_finish_netdev_dump(dev);
2087
2088         return err;
2089 }
2090
2091 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2092 {
2093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2094         struct net_device *dev = info->user_ptr[1];
2095         struct station_info sinfo;
2096         struct sk_buff *msg;
2097         u8 *mac_addr = NULL;
2098         int err;
2099
2100         memset(&sinfo, 0, sizeof(sinfo));
2101
2102         if (!info->attrs[NL80211_ATTR_MAC])
2103                 return -EINVAL;
2104
2105         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2106
2107         if (!rdev->ops->get_station)
2108                 return -EOPNOTSUPP;
2109
2110         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2111         if (err)
2112                 return err;
2113
2114         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2115         if (!msg)
2116                 return -ENOMEM;
2117
2118         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2119                                  dev, mac_addr, &sinfo) < 0) {
2120                 nlmsg_free(msg);
2121                 return -ENOBUFS;
2122         }
2123
2124         return genlmsg_reply(msg, info);
2125 }
2126
2127 /*
2128  * Get vlan interface making sure it is running and on the right wiphy.
2129  */
2130 static int get_vlan(struct genl_info *info,
2131                     struct cfg80211_registered_device *rdev,
2132                     struct net_device **vlan)
2133 {
2134         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2135         *vlan = NULL;
2136
2137         if (vlanattr) {
2138                 *vlan = dev_get_by_index(genl_info_net(info),
2139                                          nla_get_u32(vlanattr));
2140                 if (!*vlan)
2141                         return -ENODEV;
2142                 if (!(*vlan)->ieee80211_ptr)
2143                         return -EINVAL;
2144                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2145                         return -EINVAL;
2146                 if (!netif_running(*vlan))
2147                         return -ENETDOWN;
2148         }
2149         return 0;
2150 }
2151
2152 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2153 {
2154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2155         int err;
2156         struct net_device *dev = info->user_ptr[1];
2157         struct station_parameters params;
2158         u8 *mac_addr = NULL;
2159
2160         memset(&params, 0, sizeof(params));
2161
2162         params.listen_interval = -1;
2163
2164         if (info->attrs[NL80211_ATTR_STA_AID])
2165                 return -EINVAL;
2166
2167         if (!info->attrs[NL80211_ATTR_MAC])
2168                 return -EINVAL;
2169
2170         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2171
2172         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2173                 params.supported_rates =
2174                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2175                 params.supported_rates_len =
2176                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2177         }
2178
2179         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2180                 params.listen_interval =
2181                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2182
2183         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2184                 params.ht_capa =
2185                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2186
2187         if (parse_station_flags(info, &params))
2188                 return -EINVAL;
2189
2190         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2191                 params.plink_action =
2192                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2193
2194         err = get_vlan(info, rdev, &params.vlan);
2195         if (err)
2196                 goto out;
2197
2198         /* validate settings */
2199         err = 0;
2200
2201         switch (dev->ieee80211_ptr->iftype) {
2202         case NL80211_IFTYPE_AP:
2203         case NL80211_IFTYPE_AP_VLAN:
2204         case NL80211_IFTYPE_P2P_GO:
2205                 /* disallow mesh-specific things */
2206                 if (params.plink_action)
2207                         err = -EINVAL;
2208                 break;
2209         case NL80211_IFTYPE_P2P_CLIENT:
2210         case NL80211_IFTYPE_STATION:
2211                 /* disallow everything but AUTHORIZED flag */
2212                 if (params.plink_action)
2213                         err = -EINVAL;
2214                 if (params.vlan)
2215                         err = -EINVAL;
2216                 if (params.supported_rates)
2217                         err = -EINVAL;
2218                 if (params.ht_capa)
2219                         err = -EINVAL;
2220                 if (params.listen_interval >= 0)
2221                         err = -EINVAL;
2222                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2223                         err = -EINVAL;
2224                 break;
2225         case NL80211_IFTYPE_MESH_POINT:
2226                 /* disallow things mesh doesn't support */
2227                 if (params.vlan)
2228                         err = -EINVAL;
2229                 if (params.ht_capa)
2230                         err = -EINVAL;
2231                 if (params.listen_interval >= 0)
2232                         err = -EINVAL;
2233                 if (params.supported_rates)
2234                         err = -EINVAL;
2235                 if (params.sta_flags_mask)
2236                         err = -EINVAL;
2237                 break;
2238         default:
2239                 err = -EINVAL;
2240         }
2241
2242         if (err)
2243                 goto out;
2244
2245         if (!rdev->ops->change_station) {
2246                 err = -EOPNOTSUPP;
2247                 goto out;
2248         }
2249
2250         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2251
2252  out:
2253         if (params.vlan)
2254                 dev_put(params.vlan);
2255
2256         return err;
2257 }
2258
2259 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2260 {
2261         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2262         int err;
2263         struct net_device *dev = info->user_ptr[1];
2264         struct station_parameters params;
2265         u8 *mac_addr = NULL;
2266
2267         memset(&params, 0, sizeof(params));
2268
2269         if (!info->attrs[NL80211_ATTR_MAC])
2270                 return -EINVAL;
2271
2272         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2273                 return -EINVAL;
2274
2275         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2276                 return -EINVAL;
2277
2278         if (!info->attrs[NL80211_ATTR_STA_AID])
2279                 return -EINVAL;
2280
2281         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2282         params.supported_rates =
2283                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2284         params.supported_rates_len =
2285                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2286         params.listen_interval =
2287                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2288
2289         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2290         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2291                 return -EINVAL;
2292
2293         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2294                 params.ht_capa =
2295                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2296
2297         if (parse_station_flags(info, &params))
2298                 return -EINVAL;
2299
2300         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2301             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2303                 return -EINVAL;
2304
2305         err = get_vlan(info, rdev, &params.vlan);
2306         if (err)
2307                 goto out;
2308
2309         /* validate settings */
2310         err = 0;
2311
2312         if (!rdev->ops->add_station) {
2313                 err = -EOPNOTSUPP;
2314                 goto out;
2315         }
2316
2317         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2318
2319  out:
2320         if (params.vlan)
2321                 dev_put(params.vlan);
2322         return err;
2323 }
2324
2325 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2326 {
2327         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2328         struct net_device *dev = info->user_ptr[1];
2329         u8 *mac_addr = NULL;
2330
2331         if (info->attrs[NL80211_ATTR_MAC])
2332                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2333
2334         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2335             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2336             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2337             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2338                 return -EINVAL;
2339
2340         if (!rdev->ops->del_station)
2341                 return -EOPNOTSUPP;
2342
2343         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2344 }
2345
2346 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2347                                 int flags, struct net_device *dev,
2348                                 u8 *dst, u8 *next_hop,
2349                                 struct mpath_info *pinfo)
2350 {
2351         void *hdr;
2352         struct nlattr *pinfoattr;
2353
2354         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2355         if (!hdr)
2356                 return -1;
2357
2358         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2359         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2360         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2361
2362         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2363
2364         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2365         if (!pinfoattr)
2366                 goto nla_put_failure;
2367         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2368                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2369                             pinfo->frame_qlen);
2370         if (pinfo->filled & MPATH_INFO_SN)
2371                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2372                             pinfo->sn);
2373         if (pinfo->filled & MPATH_INFO_METRIC)
2374                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2375                             pinfo->metric);
2376         if (pinfo->filled & MPATH_INFO_EXPTIME)
2377                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2378                             pinfo->exptime);
2379         if (pinfo->filled & MPATH_INFO_FLAGS)
2380                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2381                             pinfo->flags);
2382         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2383                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2384                             pinfo->discovery_timeout);
2385         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2386                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2387                             pinfo->discovery_retries);
2388
2389         nla_nest_end(msg, pinfoattr);
2390
2391         return genlmsg_end(msg, hdr);
2392
2393  nla_put_failure:
2394         genlmsg_cancel(msg, hdr);
2395         return -EMSGSIZE;
2396 }
2397
2398 static int nl80211_dump_mpath(struct sk_buff *skb,
2399                               struct netlink_callback *cb)
2400 {
2401         struct mpath_info pinfo;
2402         struct cfg80211_registered_device *dev;
2403         struct net_device *netdev;
2404         u8 dst[ETH_ALEN];
2405         u8 next_hop[ETH_ALEN];
2406         int path_idx = cb->args[1];
2407         int err;
2408
2409         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2410         if (err)
2411                 return err;
2412
2413         if (!dev->ops->dump_mpath) {
2414                 err = -EOPNOTSUPP;
2415                 goto out_err;
2416         }
2417
2418         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2419                 err = -EOPNOTSUPP;
2420                 goto out_err;
2421         }
2422
2423         while (1) {
2424                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2425                                            dst, next_hop, &pinfo);
2426                 if (err == -ENOENT)
2427                         break;
2428                 if (err)
2429                         goto out_err;
2430
2431                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2432                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2433                                        netdev, dst, next_hop,
2434                                        &pinfo) < 0)
2435                         goto out;
2436
2437                 path_idx++;
2438         }
2439
2440
2441  out:
2442         cb->args[1] = path_idx;
2443         err = skb->len;
2444  out_err:
2445         nl80211_finish_netdev_dump(dev);
2446         return err;
2447 }
2448
2449 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2450 {
2451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2452         int err;
2453         struct net_device *dev = info->user_ptr[1];
2454         struct mpath_info pinfo;
2455         struct sk_buff *msg;
2456         u8 *dst = NULL;
2457         u8 next_hop[ETH_ALEN];
2458
2459         memset(&pinfo, 0, sizeof(pinfo));
2460
2461         if (!info->attrs[NL80211_ATTR_MAC])
2462                 return -EINVAL;
2463
2464         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2465
2466         if (!rdev->ops->get_mpath)
2467                 return -EOPNOTSUPP;
2468
2469         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2470                 return -EOPNOTSUPP;
2471
2472         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2473         if (err)
2474                 return err;
2475
2476         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2477         if (!msg)
2478                 return -ENOMEM;
2479
2480         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2481                                  dev, dst, next_hop, &pinfo) < 0) {
2482                 nlmsg_free(msg);
2483                 return -ENOBUFS;
2484         }
2485
2486         return genlmsg_reply(msg, info);
2487 }
2488
2489 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2490 {
2491         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2492         struct net_device *dev = info->user_ptr[1];
2493         u8 *dst = NULL;
2494         u8 *next_hop = NULL;
2495
2496         if (!info->attrs[NL80211_ATTR_MAC])
2497                 return -EINVAL;
2498
2499         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2500                 return -EINVAL;
2501
2502         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2503         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2504
2505         if (!rdev->ops->change_mpath)
2506                 return -EOPNOTSUPP;
2507
2508         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2509                 return -EOPNOTSUPP;
2510
2511         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2512 }
2513
2514 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2515 {
2516         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2517         struct net_device *dev = info->user_ptr[1];
2518         u8 *dst = NULL;
2519         u8 *next_hop = NULL;
2520
2521         if (!info->attrs[NL80211_ATTR_MAC])
2522                 return -EINVAL;
2523
2524         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2525                 return -EINVAL;
2526
2527         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2528         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2529
2530         if (!rdev->ops->add_mpath)
2531                 return -EOPNOTSUPP;
2532
2533         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2534                 return -EOPNOTSUPP;
2535
2536         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2537 }
2538
2539 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2540 {
2541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2542         struct net_device *dev = info->user_ptr[1];
2543         u8 *dst = NULL;
2544
2545         if (info->attrs[NL80211_ATTR_MAC])
2546                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2547
2548         if (!rdev->ops->del_mpath)
2549                 return -EOPNOTSUPP;
2550
2551         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2552 }
2553
2554 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2555 {
2556         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2557         struct net_device *dev = info->user_ptr[1];
2558         struct bss_parameters params;
2559
2560         memset(&params, 0, sizeof(params));
2561         /* default to not changing parameters */
2562         params.use_cts_prot = -1;
2563         params.use_short_preamble = -1;
2564         params.use_short_slot_time = -1;
2565         params.ap_isolate = -1;
2566         params.ht_opmode = -1;
2567
2568         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2569                 params.use_cts_prot =
2570                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2571         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2572                 params.use_short_preamble =
2573                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2574         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2575                 params.use_short_slot_time =
2576                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2577         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2578                 params.basic_rates =
2579                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2580                 params.basic_rates_len =
2581                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2582         }
2583         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2584                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2585         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2586                 params.ht_opmode =
2587                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2588
2589         if (!rdev->ops->change_bss)
2590                 return -EOPNOTSUPP;
2591
2592         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2593             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2594                 return -EOPNOTSUPP;
2595
2596         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2597 }
2598
2599 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2600         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2601         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2602         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2603         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2604         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2605         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2606 };
2607
2608 static int parse_reg_rule(struct nlattr *tb[],
2609         struct ieee80211_reg_rule *reg_rule)
2610 {
2611         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2612         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2613
2614         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2615                 return -EINVAL;
2616         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2617                 return -EINVAL;
2618         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2619                 return -EINVAL;
2620         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2621                 return -EINVAL;
2622         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2623                 return -EINVAL;
2624
2625         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2626
2627         freq_range->start_freq_khz =
2628                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2629         freq_range->end_freq_khz =
2630                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2631         freq_range->max_bandwidth_khz =
2632                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2633
2634         power_rule->max_eirp =
2635                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2636
2637         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2638                 power_rule->max_antenna_gain =
2639                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2640
2641         return 0;
2642 }
2643
2644 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2645 {
2646         int r;
2647         char *data = NULL;
2648
2649         /*
2650          * You should only get this when cfg80211 hasn't yet initialized
2651          * completely when built-in to the kernel right between the time
2652          * window between nl80211_init() and regulatory_init(), if that is
2653          * even possible.
2654          */
2655         mutex_lock(&cfg80211_mutex);
2656         if (unlikely(!cfg80211_regdomain)) {
2657                 mutex_unlock(&cfg80211_mutex);
2658                 return -EINPROGRESS;
2659         }
2660         mutex_unlock(&cfg80211_mutex);
2661
2662         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2663                 return -EINVAL;
2664
2665         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2666
2667         r = regulatory_hint_user(data);
2668
2669         return r;
2670 }
2671
2672 static int nl80211_get_mesh_params(struct sk_buff *skb,
2673                                    struct genl_info *info)
2674 {
2675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2676         struct net_device *dev = info->user_ptr[1];
2677         struct wireless_dev *wdev = dev->ieee80211_ptr;
2678         struct mesh_config cur_params;
2679         int err = 0;
2680         void *hdr;
2681         struct nlattr *pinfoattr;
2682         struct sk_buff *msg;
2683
2684         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2685                 return -EOPNOTSUPP;
2686
2687         if (!rdev->ops->get_mesh_params)
2688                 return -EOPNOTSUPP;
2689
2690         wdev_lock(wdev);
2691         /* If not connected, get default parameters */
2692         if (!wdev->mesh_id_len)
2693                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2694         else
2695                 err = rdev->ops->get_mesh_params(&rdev->wiphy, dev,
2696                                                  &cur_params);
2697         wdev_unlock(wdev);
2698
2699         if (err)
2700                 return err;
2701
2702         /* Draw up a netlink message to send back */
2703         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2704         if (!msg)
2705                 return -ENOMEM;
2706         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2707                              NL80211_CMD_GET_MESH_PARAMS);
2708         if (!hdr)
2709                 goto nla_put_failure;
2710         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2711         if (!pinfoattr)
2712                 goto nla_put_failure;
2713         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2714         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2715                         cur_params.dot11MeshRetryTimeout);
2716         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2717                         cur_params.dot11MeshConfirmTimeout);
2718         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2719                         cur_params.dot11MeshHoldingTimeout);
2720         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2721                         cur_params.dot11MeshMaxPeerLinks);
2722         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2723                         cur_params.dot11MeshMaxRetries);
2724         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2725                         cur_params.dot11MeshTTL);
2726         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2727                         cur_params.element_ttl);
2728         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2729                         cur_params.auto_open_plinks);
2730         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2731                         cur_params.dot11MeshHWMPmaxPREQretries);
2732         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2733                         cur_params.path_refresh_time);
2734         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2735                         cur_params.min_discovery_timeout);
2736         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2737                         cur_params.dot11MeshHWMPactivePathTimeout);
2738         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2739                         cur_params.dot11MeshHWMPpreqMinInterval);
2740         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2741                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2742         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2743                         cur_params.dot11MeshHWMPRootMode);
2744         nla_nest_end(msg, pinfoattr);
2745         genlmsg_end(msg, hdr);
2746         return genlmsg_reply(msg, info);
2747
2748  nla_put_failure:
2749         genlmsg_cancel(msg, hdr);
2750         nlmsg_free(msg);
2751         return -ENOBUFS;
2752 }
2753
2754 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2755         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2756         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2757         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2758         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2759         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2760         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2761         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2762         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2763
2764         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2765         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2766         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2767         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2768         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2769         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2770 };
2771
2772 static int nl80211_parse_mesh_params(struct genl_info *info,
2773                                      struct mesh_config *cfg,
2774                                      u32 *mask_out)
2775 {
2776         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2777         u32 mask = 0;
2778
2779 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2780 do {\
2781         if (table[attr_num]) {\
2782                 cfg->param = nla_fn(table[attr_num]); \
2783                 mask |= (1 << (attr_num - 1)); \
2784         } \
2785 } while (0);\
2786
2787
2788         if (!info->attrs[NL80211_ATTR_MESH_PARAMS])
2789                 return -EINVAL;
2790         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2791                              info->attrs[NL80211_ATTR_MESH_PARAMS],
2792                              nl80211_meshconf_params_policy))
2793                 return -EINVAL;
2794
2795         /* This makes sure that there aren't more than 32 mesh config
2796          * parameters (otherwise our bitfield scheme would not work.) */
2797         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2798
2799         /* Fill in the params struct */
2800         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2801                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2802         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2803                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2804         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2805                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2806         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2807                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2808         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2809                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2810         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2811                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2812         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
2813                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
2814         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2815                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2816         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2817                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2818                         nla_get_u8);
2819         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2820                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2821         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2822                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2823                         nla_get_u16);
2824         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2825                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2826                         nla_get_u32);
2827         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2828                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2829                         nla_get_u16);
2830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2831                         dot11MeshHWMPnetDiameterTraversalTime,
2832                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2833                         nla_get_u16);
2834         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2835                         dot11MeshHWMPRootMode, mask,
2836                         NL80211_MESHCONF_HWMP_ROOTMODE,
2837                         nla_get_u8);
2838
2839         if (mask_out)
2840                 *mask_out = mask;
2841         return 0;
2842
2843 #undef FILL_IN_MESH_PARAM_IF_SET
2844 }
2845
2846 static int nl80211_update_mesh_params(struct sk_buff *skb,
2847                                       struct genl_info *info)
2848 {
2849         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2850         struct net_device *dev = info->user_ptr[1];
2851         struct wireless_dev *wdev = dev->ieee80211_ptr;
2852         struct mesh_config cfg;
2853         u32 mask;
2854         int err;
2855
2856         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2857                 return -EOPNOTSUPP;
2858
2859         if (!rdev->ops->update_mesh_params)
2860                 return -EOPNOTSUPP;
2861
2862         err = nl80211_parse_mesh_params(info, &cfg, &mask);
2863         if (err)
2864                 return err;
2865
2866         wdev_lock(wdev);
2867         if (!wdev->mesh_id_len)
2868                 err = -ENOLINK;
2869
2870         if (!err)
2871                 err = rdev->ops->update_mesh_params(&rdev->wiphy, dev,
2872                                                     mask, &cfg);
2873
2874         wdev_unlock(wdev);
2875
2876         return err;
2877 }
2878
2879 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2880 {
2881         struct sk_buff *msg;
2882         void *hdr = NULL;
2883         struct nlattr *nl_reg_rules;
2884         unsigned int i;
2885         int err = -EINVAL;
2886
2887         mutex_lock(&cfg80211_mutex);
2888
2889         if (!cfg80211_regdomain)
2890                 goto out;
2891
2892         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2893         if (!msg) {
2894                 err = -ENOBUFS;
2895                 goto out;
2896         }
2897
2898         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2899                              NL80211_CMD_GET_REG);
2900         if (!hdr)
2901                 goto nla_put_failure;
2902
2903         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2904                 cfg80211_regdomain->alpha2);
2905
2906         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2907         if (!nl_reg_rules)
2908                 goto nla_put_failure;
2909
2910         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2911                 struct nlattr *nl_reg_rule;
2912                 const struct ieee80211_reg_rule *reg_rule;
2913                 const struct ieee80211_freq_range *freq_range;
2914                 const struct ieee80211_power_rule *power_rule;
2915
2916                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2917                 freq_range = &reg_rule->freq_range;
2918                 power_rule = &reg_rule->power_rule;
2919
2920                 nl_reg_rule = nla_nest_start(msg, i);
2921                 if (!nl_reg_rule)
2922                         goto nla_put_failure;
2923
2924                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2925                         reg_rule->flags);
2926                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2927                         freq_range->start_freq_khz);
2928                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2929                         freq_range->end_freq_khz);
2930                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2931                         freq_range->max_bandwidth_khz);
2932                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2933                         power_rule->max_antenna_gain);
2934                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2935                         power_rule->max_eirp);
2936
2937                 nla_nest_end(msg, nl_reg_rule);
2938         }
2939
2940         nla_nest_end(msg, nl_reg_rules);
2941
2942         genlmsg_end(msg, hdr);
2943         err = genlmsg_reply(msg, info);
2944         goto out;
2945
2946 nla_put_failure:
2947         genlmsg_cancel(msg, hdr);
2948         nlmsg_free(msg);
2949         err = -EMSGSIZE;
2950 out:
2951         mutex_unlock(&cfg80211_mutex);
2952         return err;
2953 }
2954
2955 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2956 {
2957         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2958         struct nlattr *nl_reg_rule;
2959         char *alpha2 = NULL;
2960         int rem_reg_rules = 0, r = 0;
2961         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2962         struct ieee80211_regdomain *rd = NULL;
2963
2964         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2965                 return -EINVAL;
2966
2967         if (!info->attrs[NL80211_ATTR_REG_RULES])
2968                 return -EINVAL;
2969
2970         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2971
2972         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2973                         rem_reg_rules) {
2974                 num_rules++;
2975                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2976                         return -EINVAL;
2977         }
2978
2979         mutex_lock(&cfg80211_mutex);
2980
2981         if (!reg_is_valid_request(alpha2)) {
2982                 r = -EINVAL;
2983                 goto bad_reg;
2984         }
2985
2986         size_of_regd = sizeof(struct ieee80211_regdomain) +
2987                 (num_rules * sizeof(struct ieee80211_reg_rule));
2988
2989         rd = kzalloc(size_of_regd, GFP_KERNEL);
2990         if (!rd) {
2991                 r = -ENOMEM;
2992                 goto bad_reg;
2993         }
2994
2995         rd->n_reg_rules = num_rules;
2996         rd->alpha2[0] = alpha2[0];
2997         rd->alpha2[1] = alpha2[1];
2998
2999         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3000                         rem_reg_rules) {
3001                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3002                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3003                         reg_rule_policy);
3004                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3005                 if (r)
3006                         goto bad_reg;
3007
3008                 rule_idx++;
3009
3010                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3011                         r = -EINVAL;
3012                         goto bad_reg;
3013                 }
3014         }
3015
3016         BUG_ON(rule_idx != num_rules);
3017
3018         r = set_regdom(rd);
3019
3020         mutex_unlock(&cfg80211_mutex);
3021
3022         return r;
3023
3024  bad_reg:
3025         mutex_unlock(&cfg80211_mutex);
3026         kfree(rd);
3027         return r;
3028 }
3029
3030 static int validate_scan_freqs(struct nlattr *freqs)
3031 {
3032         struct nlattr *attr1, *attr2;
3033         int n_channels = 0, tmp1, tmp2;
3034
3035         nla_for_each_nested(attr1, freqs, tmp1) {
3036                 n_channels++;
3037                 /*
3038                  * Some hardware has a limited channel list for
3039                  * scanning, and it is pretty much nonsensical
3040                  * to scan for a channel twice, so disallow that
3041                  * and don't require drivers to check that the
3042                  * channel list they get isn't longer than what
3043                  * they can scan, as long as they can scan all
3044                  * the channels they registered at once.
3045                  */
3046                 nla_for_each_nested(attr2, freqs, tmp2)
3047                         if (attr1 != attr2 &&
3048                             nla_get_u32(attr1) == nla_get_u32(attr2))
3049                                 return 0;
3050         }
3051
3052         return n_channels;
3053 }
3054
3055 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3056 {
3057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3058         struct net_device *dev = info->user_ptr[1];
3059         struct cfg80211_scan_request *request;
3060         struct cfg80211_ssid *ssid;
3061         struct ieee80211_channel *channel;
3062         struct nlattr *attr;
3063         struct wiphy *wiphy;
3064         int err, tmp, n_ssids = 0, n_channels, i;
3065         enum ieee80211_band band;
3066         size_t ie_len;
3067
3068         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3069                 return -EINVAL;
3070
3071         wiphy = &rdev->wiphy;
3072
3073         if (!rdev->ops->scan)
3074                 return -EOPNOTSUPP;
3075
3076         if (rdev->scan_req)
3077                 return -EBUSY;
3078
3079         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3080                 n_channels = validate_scan_freqs(
3081                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3082                 if (!n_channels)
3083                         return -EINVAL;
3084         } else {
3085                 n_channels = 0;
3086
3087                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3088                         if (wiphy->bands[band])
3089                                 n_channels += wiphy->bands[band]->n_channels;
3090         }
3091
3092         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3093                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3094                         n_ssids++;
3095
3096         if (n_ssids > wiphy->max_scan_ssids)
3097                 return -EINVAL;
3098
3099         if (info->attrs[NL80211_ATTR_IE])
3100                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3101         else
3102                 ie_len = 0;
3103
3104         if (ie_len > wiphy->max_scan_ie_len)
3105                 return -EINVAL;
3106
3107         request = kzalloc(sizeof(*request)
3108                         + sizeof(*ssid) * n_ssids
3109                         + sizeof(channel) * n_channels
3110                         + ie_len, GFP_KERNEL);
3111         if (!request)
3112                 return -ENOMEM;
3113
3114         if (n_ssids)
3115                 request->ssids = (void *)&request->channels[n_channels];
3116         request->n_ssids = n_ssids;
3117         if (ie_len) {
3118                 if (request->ssids)
3119                         request->ie = (void *)(request->ssids + n_ssids);
3120                 else
3121                         request->ie = (void *)(request->channels + n_channels);
3122         }
3123
3124         i = 0;
3125         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3126                 /* user specified, bail out if channel not found */
3127                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3128                         struct ieee80211_channel *chan;
3129
3130                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3131
3132                         if (!chan) {
3133                                 err = -EINVAL;
3134                                 goto out_free;
3135                         }
3136
3137                         /* ignore disabled channels */
3138                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3139                                 continue;
3140
3141                         request->channels[i] = chan;
3142                         i++;
3143                 }
3144         } else {
3145                 /* all channels */
3146                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3147                         int j;
3148                         if (!wiphy->bands[band])
3149                                 continue;
3150                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3151                                 struct ieee80211_channel *chan;
3152
3153                                 chan = &wiphy->bands[band]->channels[j];
3154
3155                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3156                                         continue;
3157
3158                                 request->channels[i] = chan;
3159                                 i++;
3160                         }
3161                 }
3162         }
3163
3164         if (!i) {
3165                 err = -EINVAL;
3166                 goto out_free;
3167         }
3168
3169         request->n_channels = i;
3170
3171         i = 0;
3172         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3173                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3174                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3175                                 err = -EINVAL;
3176                                 goto out_free;
3177                         }
3178                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3179                         request->ssids[i].ssid_len = nla_len(attr);
3180                         i++;
3181                 }
3182         }
3183
3184         if (info->attrs[NL80211_ATTR_IE]) {
3185                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3186                 memcpy((void *)request->ie,
3187                        nla_data(info->attrs[NL80211_ATTR_IE]),
3188                        request->ie_len);
3189         }
3190
3191         request->dev = dev;
3192         request->wiphy = &rdev->wiphy;
3193
3194         rdev->scan_req = request;
3195         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3196
3197         if (!err) {
3198                 nl80211_send_scan_start(rdev, dev);
3199                 dev_hold(dev);
3200         } else {
3201  out_free:
3202                 rdev->scan_req = NULL;
3203                 kfree(request);
3204         }
3205
3206         return err;
3207 }
3208
3209 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3210                             struct cfg80211_registered_device *rdev,
3211                             struct wireless_dev *wdev,
3212                             struct cfg80211_internal_bss *intbss)
3213 {
3214         struct cfg80211_bss *res = &intbss->pub;
3215         void *hdr;
3216         struct nlattr *bss;
3217         int i;
3218
3219         ASSERT_WDEV_LOCK(wdev);
3220
3221         hdr = nl80211hdr_put(msg, pid, seq, flags,
3222                              NL80211_CMD_NEW_SCAN_RESULTS);
3223         if (!hdr)
3224                 return -1;
3225
3226         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3227         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3228
3229         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3230         if (!bss)
3231                 goto nla_put_failure;
3232         if (!is_zero_ether_addr(res->bssid))
3233                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3234         if (res->information_elements && res->len_information_elements)
3235                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3236                         res->len_information_elements,
3237                         res->information_elements);
3238         if (res->beacon_ies && res->len_beacon_ies &&
3239             res->beacon_ies != res->information_elements)
3240                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3241                         res->len_beacon_ies, res->beacon_ies);
3242         if (res->tsf)
3243                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3244         if (res->beacon_interval)
3245                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3246         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3247         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3248         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3249                 jiffies_to_msecs(jiffies - intbss->ts));
3250
3251         switch (rdev->wiphy.signal_type) {
3252         case CFG80211_SIGNAL_TYPE_MBM:
3253                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3254                 break;
3255         case CFG80211_SIGNAL_TYPE_UNSPEC:
3256                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3257                 break;
3258         default:
3259                 break;
3260         }
3261
3262         switch (wdev->iftype) {
3263         case NL80211_IFTYPE_P2P_CLIENT:
3264         case NL80211_IFTYPE_STATION:
3265                 if (intbss == wdev->current_bss)
3266                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3267                                     NL80211_BSS_STATUS_ASSOCIATED);
3268                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3269                         if (intbss != wdev->auth_bsses[i])
3270                                 continue;
3271                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3272                                     NL80211_BSS_STATUS_AUTHENTICATED);
3273                         break;
3274                 }
3275                 break;
3276         case NL80211_IFTYPE_ADHOC:
3277                 if (intbss == wdev->current_bss)
3278                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3279                                     NL80211_BSS_STATUS_IBSS_JOINED);
3280                 break;
3281         default:
3282                 break;
3283         }
3284
3285         nla_nest_end(msg, bss);
3286
3287         return genlmsg_end(msg, hdr);
3288
3289  nla_put_failure:
3290         genlmsg_cancel(msg, hdr);
3291         return -EMSGSIZE;
3292 }
3293
3294 static int nl80211_dump_scan(struct sk_buff *skb,
3295                              struct netlink_callback *cb)
3296 {
3297         struct cfg80211_registered_device *rdev;
3298         struct net_device *dev;
3299         struct cfg80211_internal_bss *scan;
3300         struct wireless_dev *wdev;
3301         int start = cb->args[1], idx = 0;
3302         int err;
3303
3304         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3305         if (err)
3306                 return err;
3307
3308         wdev = dev->ieee80211_ptr;
3309
3310         wdev_lock(wdev);
3311         spin_lock_bh(&rdev->bss_lock);
3312         cfg80211_bss_expire(rdev);
3313
3314         list_for_each_entry(scan, &rdev->bss_list, list) {
3315                 if (++idx <= start)
3316                         continue;
3317                 if (nl80211_send_bss(skb,
3318                                 NETLINK_CB(cb->skb).pid,
3319                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3320                                 rdev, wdev, scan) < 0) {
3321                         idx--;
3322                         break;
3323                 }
3324         }
3325
3326         spin_unlock_bh(&rdev->bss_lock);
3327         wdev_unlock(wdev);
3328
3329         cb->args[1] = idx;
3330         nl80211_finish_netdev_dump(rdev);
3331
3332         return skb->len;
3333 }
3334
3335 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3336                                 int flags, struct net_device *dev,
3337                                 struct survey_info *survey)
3338 {
3339         void *hdr;
3340         struct nlattr *infoattr;
3341
3342         /* Survey without a channel doesn't make sense */
3343         if (!survey->channel)
3344                 return -EINVAL;
3345
3346         hdr = nl80211hdr_put(msg, pid, seq, flags,
3347                              NL80211_CMD_NEW_SURVEY_RESULTS);
3348         if (!hdr)
3349                 return -ENOMEM;
3350
3351         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3352
3353         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3354         if (!infoattr)
3355                 goto nla_put_failure;
3356
3357         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3358                     survey->channel->center_freq);
3359         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3360                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3361                             survey->noise);
3362         if (survey->filled & SURVEY_INFO_IN_USE)
3363                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3364         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3365                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3366                             survey->channel_time);
3367         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3368                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3369                             survey->channel_time_busy);
3370         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3371                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3372                             survey->channel_time_ext_busy);
3373         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3374                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3375                             survey->channel_time_rx);
3376         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3377                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3378                             survey->channel_time_tx);
3379
3380         nla_nest_end(msg, infoattr);
3381
3382         return genlmsg_end(msg, hdr);
3383
3384  nla_put_failure:
3385         genlmsg_cancel(msg, hdr);
3386         return -EMSGSIZE;
3387 }
3388
3389 static int nl80211_dump_survey(struct sk_buff *skb,
3390                         struct netlink_callback *cb)
3391 {
3392         struct survey_info survey;
3393         struct cfg80211_registered_device *dev;
3394         struct net_device *netdev;
3395         int survey_idx = cb->args[1];
3396         int res;
3397
3398         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3399         if (res)
3400                 return res;
3401
3402         if (!dev->ops->dump_survey) {
3403                 res = -EOPNOTSUPP;
3404                 goto out_err;
3405         }
3406
3407         while (1) {
3408                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3409                                             &survey);
3410                 if (res == -ENOENT)
3411                         break;
3412                 if (res)
3413                         goto out_err;
3414
3415                 if (nl80211_send_survey(skb,
3416                                 NETLINK_CB(cb->skb).pid,
3417                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3418                                 netdev,
3419                                 &survey) < 0)
3420                         goto out;
3421                 survey_idx++;
3422         }
3423
3424  out:
3425         cb->args[1] = survey_idx;
3426         res = skb->len;
3427  out_err:
3428         nl80211_finish_netdev_dump(dev);
3429         return res;
3430 }
3431
3432 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3433 {
3434         return auth_type <= NL80211_AUTHTYPE_MAX;
3435 }
3436
3437 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3438 {
3439         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3440                                   NL80211_WPA_VERSION_2));
3441 }
3442
3443 static bool nl80211_valid_akm_suite(u32 akm)
3444 {
3445         return akm == WLAN_AKM_SUITE_8021X ||
3446                 akm == WLAN_AKM_SUITE_PSK;
3447 }
3448
3449 static bool nl80211_valid_cipher_suite(u32 cipher)
3450 {
3451         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3452                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3453                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3454                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3455                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3456 }
3457
3458
3459 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3460 {
3461         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3462         struct net_device *dev = info->user_ptr[1];
3463         struct ieee80211_channel *chan;
3464         const u8 *bssid, *ssid, *ie = NULL;
3465         int err, ssid_len, ie_len = 0;
3466         enum nl80211_auth_type auth_type;
3467         struct key_parse key;
3468         bool local_state_change;
3469
3470         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3471                 return -EINVAL;
3472
3473         if (!info->attrs[NL80211_ATTR_MAC])
3474                 return -EINVAL;
3475
3476         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3477                 return -EINVAL;
3478
3479         if (!info->attrs[NL80211_ATTR_SSID])
3480                 return -EINVAL;
3481
3482         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3483                 return -EINVAL;
3484
3485         err = nl80211_parse_key(info, &key);
3486         if (err)
3487                 return err;
3488
3489         if (key.idx >= 0) {
3490                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3491                         return -EINVAL;
3492                 if (!key.p.key || !key.p.key_len)
3493                         return -EINVAL;
3494                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3495                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3496                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3497                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3498                         return -EINVAL;
3499                 if (key.idx > 4)
3500                         return -EINVAL;
3501         } else {
3502                 key.p.key_len = 0;
3503                 key.p.key = NULL;
3504         }
3505
3506         if (key.idx >= 0) {
3507                 int i;
3508                 bool ok = false;
3509                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3510                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3511                                 ok = true;
3512                                 break;
3513                         }
3514                 }
3515                 if (!ok)
3516                         return -EINVAL;
3517         }
3518
3519         if (!rdev->ops->auth)
3520                 return -EOPNOTSUPP;
3521
3522         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3523             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3524                 return -EOPNOTSUPP;
3525
3526         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3527         chan = ieee80211_get_channel(&rdev->wiphy,
3528                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3529         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3530                 return -EINVAL;
3531
3532         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3533         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3534
3535         if (info->attrs[NL80211_ATTR_IE]) {
3536                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3537                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3538         }
3539
3540         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3541         if (!nl80211_valid_auth_type(auth_type))
3542                 return -EINVAL;
3543
3544         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3545
3546         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3547                                   ssid, ssid_len, ie, ie_len,
3548                                   key.p.key, key.p.key_len, key.idx,
3549                                   local_state_change);
3550 }
3551
3552 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3553                                    struct genl_info *info,
3554                                    struct cfg80211_crypto_settings *settings,
3555                                    int cipher_limit)
3556 {
3557         memset(settings, 0, sizeof(*settings));
3558
3559         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3560
3561         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3562                 u16 proto;
3563                 proto = nla_get_u16(
3564                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3565                 settings->control_port_ethertype = cpu_to_be16(proto);
3566                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3567                     proto != ETH_P_PAE)
3568                         return -EINVAL;
3569                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3570                         settings->control_port_no_encrypt = true;
3571         } else
3572                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3573
3574         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3575                 void *data;
3576                 int len, i;
3577
3578                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3579                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3580                 settings->n_ciphers_pairwise = len / sizeof(u32);
3581
3582                 if (len % sizeof(u32))
3583                         return -EINVAL;
3584
3585                 if (settings->n_ciphers_pairwise > cipher_limit)
3586                         return -EINVAL;
3587
3588                 memcpy(settings->ciphers_pairwise, data, len);
3589
3590                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3591                         if (!nl80211_valid_cipher_suite(
3592                                         settings->ciphers_pairwise[i]))
3593                                 return -EINVAL;
3594         }
3595
3596         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3597                 settings->cipher_group =
3598                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3599                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3600                         return -EINVAL;
3601         }
3602
3603         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3604                 settings->wpa_versions =
3605                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3606                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3607                         return -EINVAL;
3608         }
3609
3610         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3611                 void *data;
3612                 int len, i;
3613
3614                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3615                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3616                 settings->n_akm_suites = len / sizeof(u32);
3617
3618                 if (len % sizeof(u32))
3619                         return -EINVAL;
3620
3621                 memcpy(settings->akm_suites, data, len);
3622
3623                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3624                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3625                                 return -EINVAL;
3626         }
3627
3628         return 0;
3629 }
3630
3631 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3632 {
3633         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3634         struct net_device *dev = info->user_ptr[1];
3635         struct cfg80211_crypto_settings crypto;
3636         struct ieee80211_channel *chan;
3637         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3638         int err, ssid_len, ie_len = 0;
3639         bool use_mfp = false;
3640
3641         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3642                 return -EINVAL;
3643
3644         if (!info->attrs[NL80211_ATTR_MAC] ||
3645             !info->attrs[NL80211_ATTR_SSID] ||
3646             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3647                 return -EINVAL;
3648
3649         if (!rdev->ops->assoc)
3650                 return -EOPNOTSUPP;
3651
3652         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3653             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3654                 return -EOPNOTSUPP;
3655
3656         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3657
3658         chan = ieee80211_get_channel(&rdev->wiphy,
3659                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3660         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3661                 return -EINVAL;
3662
3663         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3664         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3665
3666         if (info->attrs[NL80211_ATTR_IE]) {
3667                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3668                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3669         }
3670
3671         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3672                 enum nl80211_mfp mfp =
3673                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3674                 if (mfp == NL80211_MFP_REQUIRED)
3675                         use_mfp = true;
3676                 else if (mfp != NL80211_MFP_NO)
3677                         return -EINVAL;
3678         }
3679
3680         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3681                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3682
3683         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3684         if (!err)
3685                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3686                                           ssid, ssid_len, ie, ie_len, use_mfp,
3687                                           &crypto);
3688
3689         return err;
3690 }
3691
3692 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3693 {
3694         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3695         struct net_device *dev = info->user_ptr[1];
3696         const u8 *ie = NULL, *bssid;
3697         int ie_len = 0;
3698         u16 reason_code;
3699         bool local_state_change;
3700
3701         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3702                 return -EINVAL;
3703
3704         if (!info->attrs[NL80211_ATTR_MAC])
3705                 return -EINVAL;
3706
3707         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3708                 return -EINVAL;
3709
3710         if (!rdev->ops->deauth)
3711                 return -EOPNOTSUPP;
3712
3713         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3714             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3715                 return -EOPNOTSUPP;
3716
3717         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3718
3719         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3720         if (reason_code == 0) {
3721                 /* Reason Code 0 is reserved */
3722                 return -EINVAL;
3723         }
3724
3725         if (info->attrs[NL80211_ATTR_IE]) {
3726                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3727                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3728         }
3729
3730         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3731
3732         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3733                                     local_state_change);
3734 }
3735
3736 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3737 {
3738         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3739         struct net_device *dev = info->user_ptr[1];
3740         const u8 *ie = NULL, *bssid;
3741         int ie_len = 0;
3742         u16 reason_code;
3743         bool local_state_change;
3744
3745         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3746                 return -EINVAL;
3747
3748         if (!info->attrs[NL80211_ATTR_MAC])
3749                 return -EINVAL;
3750
3751         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3752                 return -EINVAL;
3753
3754         if (!rdev->ops->disassoc)
3755                 return -EOPNOTSUPP;
3756
3757         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3758             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3759                 return -EOPNOTSUPP;
3760
3761         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3762
3763         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3764         if (reason_code == 0) {
3765                 /* Reason Code 0 is reserved */
3766                 return -EINVAL;
3767         }
3768
3769         if (info->attrs[NL80211_ATTR_IE]) {
3770                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3771                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3772         }
3773
3774         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3775
3776         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3777                                       local_state_change);
3778 }
3779
3780 static bool
3781 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
3782                          int mcast_rate[IEEE80211_NUM_BANDS],
3783                          int rateval)
3784 {
3785         struct wiphy *wiphy = &rdev->wiphy;
3786         bool found = false;
3787         int band, i;
3788
3789         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3790                 struct ieee80211_supported_band *sband;
3791
3792                 sband = wiphy->bands[band];
3793                 if (!sband)
3794                         continue;
3795
3796                 for (i = 0; i < sband->n_bitrates; i++) {
3797                         if (sband->bitrates[i].bitrate == rateval) {
3798                                 mcast_rate[band] = i + 1;
3799                                 found = true;
3800                                 break;
3801                         }
3802                 }
3803         }
3804
3805         return found;
3806 }
3807
3808 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3809 {
3810         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3811         struct net_device *dev = info->user_ptr[1];
3812         struct cfg80211_ibss_params ibss;
3813         struct wiphy *wiphy;
3814         struct cfg80211_cached_keys *connkeys = NULL;
3815         int err;
3816
3817         memset(&ibss, 0, sizeof(ibss));
3818
3819         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3820                 return -EINVAL;
3821
3822         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3823             !info->attrs[NL80211_ATTR_SSID] ||
3824             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3825                 return -EINVAL;
3826
3827         ibss.beacon_interval = 100;
3828
3829         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3830                 ibss.beacon_interval =
3831                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3832                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3833                         return -EINVAL;
3834         }
3835
3836         if (!rdev->ops->join_ibss)
3837                 return -EOPNOTSUPP;
3838
3839         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3840                 return -EOPNOTSUPP;
3841
3842         wiphy = &rdev->wiphy;
3843
3844         if (info->attrs[NL80211_ATTR_MAC])
3845                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3846         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3847         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3848
3849         if (info->attrs[NL80211_ATTR_IE]) {
3850                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3851                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3852         }
3853
3854         ibss.channel = ieee80211_get_channel(wiphy,
3855                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3856         if (!ibss.channel ||
3857             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3858             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3859                 return -EINVAL;
3860
3861         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3862         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3863
3864         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3865                 u8 *rates =
3866                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3867                 int n_rates =
3868                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3869                 struct ieee80211_supported_band *sband =
3870                         wiphy->bands[ibss.channel->band];
3871                 int i, j;
3872
3873                 if (n_rates == 0)
3874                         return -EINVAL;
3875
3876                 for (i = 0; i < n_rates; i++) {
3877                         int rate = (rates[i] & 0x7f) * 5;
3878                         bool found = false;
3879
3880                         for (j = 0; j < sband->n_bitrates; j++) {
3881                                 if (sband->bitrates[j].bitrate == rate) {
3882                                         found = true;
3883                                         ibss.basic_rates |= BIT(j);
3884                                         break;
3885                                 }
3886                         }
3887                         if (!found)
3888                                 return -EINVAL;
3889                 }
3890         }
3891
3892         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
3893             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
3894                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
3895                 return -EINVAL;
3896
3897         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3898                 connkeys = nl80211_parse_connkeys(rdev,
3899                                         info->attrs[NL80211_ATTR_KEYS]);
3900                 if (IS_ERR(connkeys))
3901                         return PTR_ERR(connkeys);
3902         }
3903
3904         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3905         if (err)
3906                 kfree(connkeys);
3907         return err;
3908 }
3909
3910 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3911 {
3912         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3913         struct net_device *dev = info->user_ptr[1];
3914
3915         if (!rdev->ops->leave_ibss)
3916                 return -EOPNOTSUPP;
3917
3918         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3919                 return -EOPNOTSUPP;
3920
3921         return cfg80211_leave_ibss(rdev, dev, false);
3922 }
3923
3924 #ifdef CONFIG_NL80211_TESTMODE
3925 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3926         .name = "testmode",
3927 };
3928
3929 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3930 {
3931         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3932         int err;
3933
3934         if (!info->attrs[NL80211_ATTR_TESTDATA])
3935                 return -EINVAL;
3936
3937         err = -EOPNOTSUPP;
3938         if (rdev->ops->testmode_cmd) {
3939                 rdev->testmode_info = info;
3940                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3941                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3942                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3943                 rdev->testmode_info = NULL;
3944         }
3945
3946         return err;
3947 }
3948
3949 static struct sk_buff *
3950 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3951                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3952 {
3953         struct sk_buff *skb;
3954         void *hdr;
3955         struct nlattr *data;
3956
3957         skb = nlmsg_new(approxlen + 100, gfp);
3958         if (!skb)
3959                 return NULL;
3960
3961         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3962         if (!hdr) {
3963                 kfree_skb(skb);
3964                 return NULL;
3965         }
3966
3967         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3968         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3969
3970         ((void **)skb->cb)[0] = rdev;
3971         ((void **)skb->cb)[1] = hdr;
3972         ((void **)skb->cb)[2] = data;
3973
3974         return skb;
3975
3976  nla_put_failure:
3977         kfree_skb(skb);
3978         return NULL;
3979 }
3980
3981 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3982                                                   int approxlen)
3983 {
3984         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3985
3986         if (WARN_ON(!rdev->testmode_info))
3987                 return NULL;
3988
3989         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3990                                 rdev->testmode_info->snd_pid,
3991                                 rdev->testmode_info->snd_seq,
3992                                 GFP_KERNEL);
3993 }
3994 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3995
3996 int cfg80211_testmode_reply(struct sk_buff *skb)
3997 {
3998         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3999         void *hdr = ((void **)skb->cb)[1];
4000         struct nlattr *data = ((void **)skb->cb)[2];
4001
4002         if (WARN_ON(!rdev->testmode_info)) {
4003                 kfree_skb(skb);
4004                 return -EINVAL;
4005         }
4006
4007         nla_nest_end(skb, data);
4008         genlmsg_end(skb, hdr);
4009         return genlmsg_reply(skb, rdev->testmode_info);
4010 }
4011 EXPORT_SYMBOL(cfg80211_testmode_reply);
4012
4013 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4014                                                   int approxlen, gfp_t gfp)
4015 {
4016         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4017
4018         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4019 }
4020 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4021
4022 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4023 {
4024         void *hdr = ((void **)skb->cb)[1];
4025         struct nlattr *data = ((void **)skb->cb)[2];
4026
4027         nla_nest_end(skb, data);
4028         genlmsg_end(skb, hdr);
4029         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4030 }
4031 EXPORT_SYMBOL(cfg80211_testmode_event);
4032 #endif
4033
4034 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4035 {
4036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4037         struct net_device *dev = info->user_ptr[1];
4038         struct cfg80211_connect_params connect;
4039         struct wiphy *wiphy;
4040         struct cfg80211_cached_keys *connkeys = NULL;
4041         int err;
4042
4043         memset(&connect, 0, sizeof(connect));
4044
4045         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4046                 return -EINVAL;
4047
4048         if (!info->attrs[NL80211_ATTR_SSID] ||
4049             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4050                 return -EINVAL;
4051
4052         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4053                 connect.auth_type =
4054                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4055                 if (!nl80211_valid_auth_type(connect.auth_type))
4056                         return -EINVAL;
4057         } else
4058                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4059
4060         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4061
4062         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4063                                       NL80211_MAX_NR_CIPHER_SUITES);
4064         if (err)
4065                 return err;
4066
4067         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4068             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4069                 return -EOPNOTSUPP;
4070
4071         wiphy = &rdev->wiphy;
4072
4073         if (info->attrs[NL80211_ATTR_MAC])
4074                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4075         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4076         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4077
4078         if (info->attrs[NL80211_ATTR_IE]) {
4079                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4080                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4081         }
4082
4083         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4084                 connect.channel =
4085                         ieee80211_get_channel(wiphy,
4086                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4087                 if (!connect.channel ||
4088                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4089                         return -EINVAL;
4090         }
4091
4092         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4093                 connkeys = nl80211_parse_connkeys(rdev,
4094                                         info->attrs[NL80211_ATTR_KEYS]);
4095                 if (IS_ERR(connkeys))
4096                         return PTR_ERR(connkeys);
4097         }
4098
4099         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4100         if (err)
4101                 kfree(connkeys);
4102         return err;
4103 }
4104
4105 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4106 {
4107         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4108         struct net_device *dev = info->user_ptr[1];
4109         u16 reason;
4110
4111         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4112                 reason = WLAN_REASON_DEAUTH_LEAVING;
4113         else
4114                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4115
4116         if (reason == 0)
4117                 return -EINVAL;
4118
4119         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4120             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4121                 return -EOPNOTSUPP;
4122
4123         return cfg80211_disconnect(rdev, dev, reason, true);
4124 }
4125
4126 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4127 {
4128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4129         struct net *net;
4130         int err;
4131         u32 pid;
4132
4133         if (!info->attrs[NL80211_ATTR_PID])
4134                 return -EINVAL;
4135
4136         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4137
4138         net = get_net_ns_by_pid(pid);
4139         if (IS_ERR(net))
4140                 return PTR_ERR(net);
4141
4142         err = 0;
4143
4144         /* check if anything to do */
4145         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4146                 err = cfg80211_switch_netns(rdev, net);
4147
4148         put_net(net);
4149         return err;
4150 }
4151
4152 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4153 {
4154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4155         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4156                         struct cfg80211_pmksa *pmksa) = NULL;
4157         struct net_device *dev = info->user_ptr[1];
4158         struct cfg80211_pmksa pmksa;
4159
4160         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4161
4162         if (!info->attrs[NL80211_ATTR_MAC])
4163                 return -EINVAL;
4164
4165         if (!info->attrs[NL80211_ATTR_PMKID])
4166                 return -EINVAL;
4167
4168         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4169         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4170
4171         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4172             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4173                 return -EOPNOTSUPP;
4174
4175         switch (info->genlhdr->cmd) {
4176         case NL80211_CMD_SET_PMKSA:
4177                 rdev_ops = rdev->ops->set_pmksa;
4178                 break;
4179         case NL80211_CMD_DEL_PMKSA:
4180                 rdev_ops = rdev->ops->del_pmksa;
4181                 break;
4182         default:
4183                 WARN_ON(1);
4184                 break;
4185         }
4186
4187         if (!rdev_ops)
4188                 return -EOPNOTSUPP;
4189
4190         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4191 }
4192
4193 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4194 {
4195         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4196         struct net_device *dev = info->user_ptr[1];
4197
4198         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4199             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4200                 return -EOPNOTSUPP;
4201
4202         if (!rdev->ops->flush_pmksa)
4203                 return -EOPNOTSUPP;
4204
4205         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4206 }
4207
4208 static int nl80211_remain_on_channel(struct sk_buff *skb,
4209                                      struct genl_info *info)
4210 {
4211         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4212         struct net_device *dev = info->user_ptr[1];
4213         struct ieee80211_channel *chan;
4214         struct sk_buff *msg;
4215         void *hdr;
4216         u64 cookie;
4217         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4218         u32 freq, duration;
4219         int err;
4220
4221         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4222             !info->attrs[NL80211_ATTR_DURATION])
4223                 return -EINVAL;
4224
4225         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4226
4227         /*
4228          * We should be on that channel for at least one jiffie,
4229          * and more than 5 seconds seems excessive.
4230          */
4231         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4232                 return -EINVAL;
4233
4234         if (!rdev->ops->remain_on_channel)
4235                 return -EOPNOTSUPP;
4236
4237         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4238                 channel_type = nla_get_u32(
4239                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4240                 if (channel_type != NL80211_CHAN_NO_HT &&
4241                     channel_type != NL80211_CHAN_HT20 &&
4242                     channel_type != NL80211_CHAN_HT40PLUS &&
4243                     channel_type != NL80211_CHAN_HT40MINUS)
4244                         return -EINVAL;
4245         }
4246
4247         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4248         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4249         if (chan == NULL)
4250                 return -EINVAL;
4251
4252         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4253         if (!msg)
4254                 return -ENOMEM;
4255
4256         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4257                              NL80211_CMD_REMAIN_ON_CHANNEL);
4258
4259         if (IS_ERR(hdr)) {
4260                 err = PTR_ERR(hdr);
4261                 goto free_msg;
4262         }
4263
4264         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4265                                            channel_type, duration, &cookie);
4266
4267         if (err)
4268                 goto free_msg;
4269
4270         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4271
4272         genlmsg_end(msg, hdr);
4273
4274         return genlmsg_reply(msg, info);
4275
4276  nla_put_failure:
4277         err = -ENOBUFS;
4278  free_msg:
4279         nlmsg_free(msg);
4280         return err;
4281 }
4282
4283 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4284                                             struct genl_info *info)
4285 {
4286         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4287         struct net_device *dev = info->user_ptr[1];
4288         u64 cookie;
4289
4290         if (!info->attrs[NL80211_ATTR_COOKIE])
4291                 return -EINVAL;
4292
4293         if (!rdev->ops->cancel_remain_on_channel)
4294                 return -EOPNOTSUPP;
4295
4296         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4297
4298         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4299 }
4300
4301 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4302                            u8 *rates, u8 rates_len)
4303 {
4304         u8 i;
4305         u32 mask = 0;
4306
4307         for (i = 0; i < rates_len; i++) {
4308                 int rate = (rates[i] & 0x7f) * 5;
4309                 int ridx;
4310                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4311                         struct ieee80211_rate *srate =
4312                                 &sband->bitrates[ridx];
4313                         if (rate == srate->bitrate) {
4314                                 mask |= 1 << ridx;
4315                                 break;
4316                         }
4317                 }
4318                 if (ridx == sband->n_bitrates)
4319                         return 0; /* rate not found */
4320         }
4321
4322         return mask;
4323 }
4324
4325 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4326         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4327                                     .len = NL80211_MAX_SUPP_RATES },
4328 };
4329
4330 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4331                                        struct genl_info *info)
4332 {
4333         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4334         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4335         struct cfg80211_bitrate_mask mask;
4336         int rem, i;
4337         struct net_device *dev = info->user_ptr[1];
4338         struct nlattr *tx_rates;
4339         struct ieee80211_supported_band *sband;
4340
4341         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4342                 return -EINVAL;
4343
4344         if (!rdev->ops->set_bitrate_mask)
4345                 return -EOPNOTSUPP;
4346
4347         memset(&mask, 0, sizeof(mask));
4348         /* Default to all rates enabled */
4349         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4350                 sband = rdev->wiphy.bands[i];
4351                 mask.control[i].legacy =
4352                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4353         }
4354
4355         /*
4356          * The nested attribute uses enum nl80211_band as the index. This maps
4357          * directly to the enum ieee80211_band values used in cfg80211.
4358          */
4359         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4360         {
4361                 enum ieee80211_band band = nla_type(tx_rates);
4362                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4363                         return -EINVAL;
4364                 sband = rdev->wiphy.bands[band];
4365                 if (sband == NULL)
4366                         return -EINVAL;
4367                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4368                           nla_len(tx_rates), nl80211_txattr_policy);
4369                 if (tb[NL80211_TXRATE_LEGACY]) {
4370                         mask.control[band].legacy = rateset_to_mask(
4371                                 sband,
4372                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4373                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4374                         if (mask.control[band].legacy == 0)
4375                                 return -EINVAL;
4376                 }
4377         }
4378
4379         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4380 }
4381
4382 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4383 {
4384         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4385         struct net_device *dev = info->user_ptr[1];
4386         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4387
4388         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4389                 return -EINVAL;
4390
4391         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4392                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4393
4394         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4395             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4396             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4397             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4398             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4399             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4400                 return -EOPNOTSUPP;
4401
4402         /* not much point in registering if we can't reply */
4403         if (!rdev->ops->mgmt_tx)
4404                 return -EOPNOTSUPP;
4405
4406         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4407                         frame_type,
4408                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4409                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4410 }
4411
4412 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4413 {
4414         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4415         struct net_device *dev = info->user_ptr[1];
4416         struct ieee80211_channel *chan;
4417         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4418         bool channel_type_valid = false;
4419         u32 freq;
4420         int err;
4421         void *hdr;
4422         u64 cookie;
4423         struct sk_buff *msg;
4424         unsigned int wait = 0;
4425         bool offchan;
4426
4427         if (!info->attrs[NL80211_ATTR_FRAME] ||
4428             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4429                 return -EINVAL;
4430
4431         if (!rdev->ops->mgmt_tx)
4432                 return -EOPNOTSUPP;
4433
4434         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4435             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4436             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4437             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4438             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4439             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4440                 return -EOPNOTSUPP;
4441
4442         if (info->attrs[NL80211_ATTR_DURATION]) {
4443                 if (!rdev->ops->mgmt_tx_cancel_wait)
4444                         return -EINVAL;
4445                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4446         }
4447
4448         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4449                 channel_type = nla_get_u32(
4450                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4451                 if (channel_type != NL80211_CHAN_NO_HT &&
4452                     channel_type != NL80211_CHAN_HT20 &&
4453                     channel_type != NL80211_CHAN_HT40PLUS &&
4454                     channel_type != NL80211_CHAN_HT40MINUS)
4455                         return -EINVAL;
4456                 channel_type_valid = true;
4457         }
4458
4459         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4460
4461         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4462         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4463         if (chan == NULL)
4464                 return -EINVAL;
4465
4466         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4467         if (!msg)
4468                 return -ENOMEM;
4469
4470         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4471                              NL80211_CMD_FRAME);
4472
4473         if (IS_ERR(hdr)) {
4474                 err = PTR_ERR(hdr);
4475                 goto free_msg;
4476         }
4477         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4478                                     channel_type_valid, wait,
4479                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4480                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4481                                     &cookie);
4482         if (err)
4483                 goto free_msg;
4484
4485         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4486
4487         genlmsg_end(msg, hdr);
4488         return genlmsg_reply(msg, info);
4489
4490  nla_put_failure:
4491         err = -ENOBUFS;
4492  free_msg:
4493         nlmsg_free(msg);
4494         return err;
4495 }
4496
4497 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4498 {
4499         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4500         struct net_device *dev = info->user_ptr[1];
4501         u64 cookie;
4502
4503         if (!info->attrs[NL80211_ATTR_COOKIE])
4504                 return -EINVAL;
4505
4506         if (!rdev->ops->mgmt_tx_cancel_wait)
4507                 return -EOPNOTSUPP;
4508
4509         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4510             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4511             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4512             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4513             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4514             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4515                 return -EOPNOTSUPP;
4516
4517         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4518
4519         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4520 }
4521
4522 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4523 {
4524         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4525         struct wireless_dev *wdev;
4526         struct net_device *dev = info->user_ptr[1];
4527         u8 ps_state;
4528         bool state;
4529         int err;
4530
4531         if (!info->attrs[NL80211_ATTR_PS_STATE])
4532                 return -EINVAL;
4533
4534         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4535
4536         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4537                 return -EINVAL;
4538
4539         wdev = dev->ieee80211_ptr;
4540
4541         if (!rdev->ops->set_power_mgmt)
4542                 return -EOPNOTSUPP;
4543
4544         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4545
4546         if (state == wdev->ps)
4547                 return 0;
4548
4549         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4550                                         wdev->ps_timeout);
4551         if (!err)
4552                 wdev->ps = state;
4553         return err;
4554 }
4555
4556 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4557 {
4558         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4559         enum nl80211_ps_state ps_state;
4560         struct wireless_dev *wdev;
4561         struct net_device *dev = info->user_ptr[1];
4562         struct sk_buff *msg;
4563         void *hdr;
4564         int err;
4565
4566         wdev = dev->ieee80211_ptr;
4567
4568         if (!rdev->ops->set_power_mgmt)
4569                 return -EOPNOTSUPP;
4570
4571         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4572         if (!msg)
4573                 return -ENOMEM;
4574
4575         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4576                              NL80211_CMD_GET_POWER_SAVE);
4577         if (!hdr) {
4578                 err = -ENOBUFS;
4579                 goto free_msg;
4580         }
4581
4582         if (wdev->ps)
4583                 ps_state = NL80211_PS_ENABLED;
4584         else
4585                 ps_state = NL80211_PS_DISABLED;
4586
4587         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4588
4589         genlmsg_end(msg, hdr);
4590         return genlmsg_reply(msg, info);
4591
4592  nla_put_failure:
4593         err = -ENOBUFS;
4594  free_msg:
4595         nlmsg_free(msg);
4596         return err;
4597 }
4598
4599 static struct nla_policy
4600 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4601         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4602         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4603         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4604 };
4605
4606 static int nl80211_set_cqm_rssi(struct genl_info *info,
4607                                 s32 threshold, u32 hysteresis)
4608 {
4609         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4610         struct wireless_dev *wdev;
4611         struct net_device *dev = info->user_ptr[1];
4612
4613         if (threshold > 0)
4614                 return -EINVAL;
4615
4616         wdev = dev->ieee80211_ptr;
4617
4618         if (!rdev->ops->set_cqm_rssi_config)
4619                 return -EOPNOTSUPP;
4620
4621         if (wdev->iftype != NL80211_IFTYPE_STATION &&
4622             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4623                 return -EOPNOTSUPP;
4624
4625         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4626                                               threshold, hysteresis);
4627 }
4628
4629 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4630 {
4631         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4632         struct nlattr *cqm;
4633         int err;
4634
4635         cqm = info->attrs[NL80211_ATTR_CQM];
4636         if (!cqm) {
4637                 err = -EINVAL;
4638                 goto out;
4639         }
4640
4641         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4642                                nl80211_attr_cqm_policy);
4643         if (err)
4644                 goto out;
4645
4646         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4647             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4648                 s32 threshold;
4649                 u32 hysteresis;
4650                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4651                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4652                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4653         } else
4654                 err = -EINVAL;
4655
4656 out:
4657         return err;
4658 }
4659
4660 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
4661 {
4662         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4663         struct net_device *dev = info->user_ptr[1];
4664         struct mesh_config cfg;
4665         int err;
4666
4667         /* start with default */
4668         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
4669
4670         if (info->attrs[NL80211_ATTR_MESH_PARAMS]) {
4671                 /* and parse parameters if given */
4672                 err = nl80211_parse_mesh_params(info, &cfg, NULL);
4673                 if (err)
4674                         return err;
4675         }
4676
4677         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
4678             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
4679                 return -EINVAL;
4680
4681         return cfg80211_join_mesh(rdev, dev,
4682                                   nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
4683                                   nla_len(info->attrs[NL80211_ATTR_MESH_ID]),
4684                                   &cfg);
4685 }
4686
4687 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
4688 {
4689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4690         struct net_device *dev = info->user_ptr[1];
4691
4692         return cfg80211_leave_mesh(rdev, dev);
4693 }
4694
4695 #define NL80211_FLAG_NEED_WIPHY         0x01
4696 #define NL80211_FLAG_NEED_NETDEV        0x02
4697 #define NL80211_FLAG_NEED_RTNL          0x04
4698 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
4699 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
4700                                          NL80211_FLAG_CHECK_NETDEV_UP)
4701
4702 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4703                             struct genl_info *info)
4704 {
4705         struct cfg80211_registered_device *rdev;
4706         struct net_device *dev;
4707         int err;
4708         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4709
4710         if (rtnl)
4711                 rtnl_lock();
4712
4713         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4714                 rdev = cfg80211_get_dev_from_info(info);
4715                 if (IS_ERR(rdev)) {
4716                         if (rtnl)
4717                                 rtnl_unlock();
4718                         return PTR_ERR(rdev);
4719                 }
4720                 info->user_ptr[0] = rdev;
4721         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4722                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4723                 if (err) {
4724                         if (rtnl)
4725                                 rtnl_unlock();
4726                         return err;
4727                 }
4728                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4729                     !netif_running(dev)) {
4730                         cfg80211_unlock_rdev(rdev);
4731                         dev_put(dev);
4732                         if (rtnl)
4733                                 rtnl_unlock();
4734                         return -ENETDOWN;
4735                 }
4736                 info->user_ptr[0] = rdev;
4737                 info->user_ptr[1] = dev;
4738         }
4739
4740         return 0;
4741 }
4742
4743 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4744                               struct genl_info *info)
4745 {
4746         if (info->user_ptr[0])
4747                 cfg80211_unlock_rdev(info->user_ptr[0]);
4748         if (info->user_ptr[1])
4749                 dev_put(info->user_ptr[1]);
4750         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4751                 rtnl_unlock();
4752 }
4753
4754 static struct genl_ops nl80211_ops[] = {
4755         {
4756                 .cmd = NL80211_CMD_GET_WIPHY,
4757                 .doit = nl80211_get_wiphy,
4758                 .dumpit = nl80211_dump_wiphy,
4759                 .policy = nl80211_policy,
4760                 /* can be retrieved by unprivileged users */
4761                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4762         },
4763         {
4764                 .cmd = NL80211_CMD_SET_WIPHY,
4765                 .doit = nl80211_set_wiphy,
4766                 .policy = nl80211_policy,
4767                 .flags = GENL_ADMIN_PERM,
4768                 .internal_flags = NL80211_FLAG_NEED_RTNL,
4769         },
4770         {
4771                 .cmd = NL80211_CMD_GET_INTERFACE,
4772                 .doit = nl80211_get_interface,
4773                 .dumpit = nl80211_dump_interface,
4774                 .policy = nl80211_policy,
4775                 /* can be retrieved by unprivileged users */
4776                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4777         },
4778         {
4779                 .cmd = NL80211_CMD_SET_INTERFACE,
4780                 .doit = nl80211_set_interface,
4781                 .policy = nl80211_policy,
4782                 .flags = GENL_ADMIN_PERM,
4783                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4784                                   NL80211_FLAG_NEED_RTNL,
4785         },
4786         {
4787                 .cmd = NL80211_CMD_NEW_INTERFACE,
4788                 .doit = nl80211_new_interface,
4789                 .policy = nl80211_policy,
4790                 .flags = GENL_ADMIN_PERM,
4791                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4792                                   NL80211_FLAG_NEED_RTNL,
4793         },
4794         {
4795                 .cmd = NL80211_CMD_DEL_INTERFACE,
4796                 .doit = nl80211_del_interface,
4797                 .policy = nl80211_policy,
4798                 .flags = GENL_ADMIN_PERM,
4799                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4800                                   NL80211_FLAG_NEED_RTNL,
4801         },
4802         {
4803                 .cmd = NL80211_CMD_GET_KEY,
4804                 .doit = nl80211_get_key,
4805                 .policy = nl80211_policy,
4806                 .flags = GENL_ADMIN_PERM,
4807                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4808                                   NL80211_FLAG_NEED_RTNL,
4809         },
4810         {
4811                 .cmd = NL80211_CMD_SET_KEY,
4812                 .doit = nl80211_set_key,
4813                 .policy = nl80211_policy,
4814                 .flags = GENL_ADMIN_PERM,
4815                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4816                                   NL80211_FLAG_NEED_RTNL,
4817         },
4818         {
4819                 .cmd = NL80211_CMD_NEW_KEY,
4820                 .doit = nl80211_new_key,
4821                 .policy = nl80211_policy,
4822                 .flags = GENL_ADMIN_PERM,
4823                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4824                                   NL80211_FLAG_NEED_RTNL,
4825         },
4826         {
4827                 .cmd = NL80211_CMD_DEL_KEY,
4828                 .doit = nl80211_del_key,
4829                 .policy = nl80211_policy,
4830                 .flags = GENL_ADMIN_PERM,
4831                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4832                                   NL80211_FLAG_NEED_RTNL,
4833         },
4834         {
4835                 .cmd = NL80211_CMD_SET_BEACON,
4836                 .policy = nl80211_policy,
4837                 .flags = GENL_ADMIN_PERM,
4838                 .doit = nl80211_addset_beacon,
4839                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4840                                   NL80211_FLAG_NEED_RTNL,
4841         },
4842         {
4843                 .cmd = NL80211_CMD_NEW_BEACON,
4844                 .policy = nl80211_policy,
4845                 .flags = GENL_ADMIN_PERM,
4846                 .doit = nl80211_addset_beacon,
4847                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4848                                   NL80211_FLAG_NEED_RTNL,
4849         },
4850         {
4851                 .cmd = NL80211_CMD_DEL_BEACON,
4852                 .policy = nl80211_policy,
4853                 .flags = GENL_ADMIN_PERM,
4854                 .doit = nl80211_del_beacon,
4855                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4856                                   NL80211_FLAG_NEED_RTNL,
4857         },
4858         {
4859                 .cmd = NL80211_CMD_GET_STATION,
4860                 .doit = nl80211_get_station,
4861                 .dumpit = nl80211_dump_station,
4862                 .policy = nl80211_policy,
4863                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4864                                   NL80211_FLAG_NEED_RTNL,
4865         },
4866         {
4867                 .cmd = NL80211_CMD_SET_STATION,
4868                 .doit = nl80211_set_station,
4869                 .policy = nl80211_policy,
4870                 .flags = GENL_ADMIN_PERM,
4871                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4872                                   NL80211_FLAG_NEED_RTNL,
4873         },
4874         {
4875                 .cmd = NL80211_CMD_NEW_STATION,
4876                 .doit = nl80211_new_station,
4877                 .policy = nl80211_policy,
4878                 .flags = GENL_ADMIN_PERM,
4879                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4880                                   NL80211_FLAG_NEED_RTNL,
4881         },
4882         {
4883                 .cmd = NL80211_CMD_DEL_STATION,
4884                 .doit = nl80211_del_station,
4885                 .policy = nl80211_policy,
4886                 .flags = GENL_ADMIN_PERM,
4887                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4888                                   NL80211_FLAG_NEED_RTNL,
4889         },
4890         {
4891                 .cmd = NL80211_CMD_GET_MPATH,
4892                 .doit = nl80211_get_mpath,
4893                 .dumpit = nl80211_dump_mpath,
4894                 .policy = nl80211_policy,
4895                 .flags = GENL_ADMIN_PERM,
4896                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4897                                   NL80211_FLAG_NEED_RTNL,
4898         },
4899         {
4900                 .cmd = NL80211_CMD_SET_MPATH,
4901                 .doit = nl80211_set_mpath,
4902                 .policy = nl80211_policy,
4903                 .flags = GENL_ADMIN_PERM,
4904                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4905                                   NL80211_FLAG_NEED_RTNL,
4906         },
4907         {
4908                 .cmd = NL80211_CMD_NEW_MPATH,
4909                 .doit = nl80211_new_mpath,
4910                 .policy = nl80211_policy,
4911                 .flags = GENL_ADMIN_PERM,
4912                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4913                                   NL80211_FLAG_NEED_RTNL,
4914         },
4915         {
4916                 .cmd = NL80211_CMD_DEL_MPATH,
4917                 .doit = nl80211_del_mpath,
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_SET_BSS,
4925                 .doit = nl80211_set_bss,
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_GET_REG,
4933                 .doit = nl80211_get_reg,
4934                 .policy = nl80211_policy,
4935                 /* can be retrieved by unprivileged users */
4936         },
4937         {
4938                 .cmd = NL80211_CMD_SET_REG,
4939                 .doit = nl80211_set_reg,
4940                 .policy = nl80211_policy,
4941                 .flags = GENL_ADMIN_PERM,
4942         },
4943         {
4944                 .cmd = NL80211_CMD_REQ_SET_REG,
4945                 .doit = nl80211_req_set_reg,
4946                 .policy = nl80211_policy,
4947                 .flags = GENL_ADMIN_PERM,
4948         },
4949         {
4950                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4951                 .doit = nl80211_get_mesh_params,
4952                 .policy = nl80211_policy,
4953                 /* can be retrieved by unprivileged users */
4954                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4955                                   NL80211_FLAG_NEED_RTNL,
4956         },
4957         {
4958                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4959                 .doit = nl80211_update_mesh_params,
4960                 .policy = nl80211_policy,
4961                 .flags = GENL_ADMIN_PERM,
4962                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4963                                   NL80211_FLAG_NEED_RTNL,
4964         },
4965         {
4966                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4967                 .doit = nl80211_trigger_scan,
4968                 .policy = nl80211_policy,
4969                 .flags = GENL_ADMIN_PERM,
4970                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4971                                   NL80211_FLAG_NEED_RTNL,
4972         },
4973         {
4974                 .cmd = NL80211_CMD_GET_SCAN,
4975                 .policy = nl80211_policy,
4976                 .dumpit = nl80211_dump_scan,
4977         },
4978         {
4979                 .cmd = NL80211_CMD_AUTHENTICATE,
4980                 .doit = nl80211_authenticate,
4981                 .policy = nl80211_policy,
4982                 .flags = GENL_ADMIN_PERM,
4983                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4984                                   NL80211_FLAG_NEED_RTNL,
4985         },
4986         {
4987                 .cmd = NL80211_CMD_ASSOCIATE,
4988                 .doit = nl80211_associate,
4989                 .policy = nl80211_policy,
4990                 .flags = GENL_ADMIN_PERM,
4991                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4992                                   NL80211_FLAG_NEED_RTNL,
4993         },
4994         {
4995                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4996                 .doit = nl80211_deauthenticate,
4997                 .policy = nl80211_policy,
4998                 .flags = GENL_ADMIN_PERM,
4999                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5000                                   NL80211_FLAG_NEED_RTNL,
5001         },
5002         {
5003                 .cmd = NL80211_CMD_DISASSOCIATE,
5004                 .doit = nl80211_disassociate,
5005                 .policy = nl80211_policy,
5006                 .flags = GENL_ADMIN_PERM,
5007                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5008                                   NL80211_FLAG_NEED_RTNL,
5009         },
5010         {
5011                 .cmd = NL80211_CMD_JOIN_IBSS,
5012                 .doit = nl80211_join_ibss,
5013                 .policy = nl80211_policy,
5014                 .flags = GENL_ADMIN_PERM,
5015                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5016                                   NL80211_FLAG_NEED_RTNL,
5017         },
5018         {
5019                 .cmd = NL80211_CMD_LEAVE_IBSS,
5020                 .doit = nl80211_leave_ibss,
5021                 .policy = nl80211_policy,
5022                 .flags = GENL_ADMIN_PERM,
5023                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5024                                   NL80211_FLAG_NEED_RTNL,
5025         },
5026 #ifdef CONFIG_NL80211_TESTMODE
5027         {
5028                 .cmd = NL80211_CMD_TESTMODE,
5029                 .doit = nl80211_testmode_do,
5030                 .policy = nl80211_policy,
5031                 .flags = GENL_ADMIN_PERM,
5032                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5033                                   NL80211_FLAG_NEED_RTNL,
5034         },
5035 #endif
5036         {
5037                 .cmd = NL80211_CMD_CONNECT,
5038                 .doit = nl80211_connect,
5039                 .policy = nl80211_policy,
5040                 .flags = GENL_ADMIN_PERM,
5041                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5042                                   NL80211_FLAG_NEED_RTNL,
5043         },
5044         {
5045                 .cmd = NL80211_CMD_DISCONNECT,
5046                 .doit = nl80211_disconnect,
5047                 .policy = nl80211_policy,
5048                 .flags = GENL_ADMIN_PERM,
5049                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5050                                   NL80211_FLAG_NEED_RTNL,
5051         },
5052         {
5053                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5054                 .doit = nl80211_wiphy_netns,
5055                 .policy = nl80211_policy,
5056                 .flags = GENL_ADMIN_PERM,
5057                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5058                                   NL80211_FLAG_NEED_RTNL,
5059         },
5060         {
5061                 .cmd = NL80211_CMD_GET_SURVEY,
5062                 .policy = nl80211_policy,
5063                 .dumpit = nl80211_dump_survey,
5064         },
5065         {
5066                 .cmd = NL80211_CMD_SET_PMKSA,
5067                 .doit = nl80211_setdel_pmksa,
5068                 .policy = nl80211_policy,
5069                 .flags = GENL_ADMIN_PERM,
5070                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5071                                   NL80211_FLAG_NEED_RTNL,
5072         },
5073         {
5074                 .cmd = NL80211_CMD_DEL_PMKSA,
5075                 .doit = nl80211_setdel_pmksa,
5076                 .policy = nl80211_policy,
5077                 .flags = GENL_ADMIN_PERM,
5078                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5079                                   NL80211_FLAG_NEED_RTNL,
5080         },
5081         {
5082                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5083                 .doit = nl80211_flush_pmksa,
5084                 .policy = nl80211_policy,
5085                 .flags = GENL_ADMIN_PERM,
5086                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5087                                   NL80211_FLAG_NEED_RTNL,
5088         },
5089         {
5090                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5091                 .doit = nl80211_remain_on_channel,
5092                 .policy = nl80211_policy,
5093                 .flags = GENL_ADMIN_PERM,
5094                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5095                                   NL80211_FLAG_NEED_RTNL,
5096         },
5097         {
5098                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5099                 .doit = nl80211_cancel_remain_on_channel,
5100                 .policy = nl80211_policy,
5101                 .flags = GENL_ADMIN_PERM,
5102                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5103                                   NL80211_FLAG_NEED_RTNL,
5104         },
5105         {
5106                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5107                 .doit = nl80211_set_tx_bitrate_mask,
5108                 .policy = nl80211_policy,
5109                 .flags = GENL_ADMIN_PERM,
5110                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5111                                   NL80211_FLAG_NEED_RTNL,
5112         },
5113         {
5114                 .cmd = NL80211_CMD_REGISTER_FRAME,
5115                 .doit = nl80211_register_mgmt,
5116                 .policy = nl80211_policy,
5117                 .flags = GENL_ADMIN_PERM,
5118                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5119                                   NL80211_FLAG_NEED_RTNL,
5120         },
5121         {
5122                 .cmd = NL80211_CMD_FRAME,
5123                 .doit = nl80211_tx_mgmt,
5124                 .policy = nl80211_policy,
5125                 .flags = GENL_ADMIN_PERM,
5126                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5127                                   NL80211_FLAG_NEED_RTNL,
5128         },
5129         {
5130                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5131                 .doit = nl80211_tx_mgmt_cancel_wait,
5132                 .policy = nl80211_policy,
5133                 .flags = GENL_ADMIN_PERM,
5134                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5135                                   NL80211_FLAG_NEED_RTNL,
5136         },
5137         {
5138                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5139                 .doit = nl80211_set_power_save,
5140                 .policy = nl80211_policy,
5141                 .flags = GENL_ADMIN_PERM,
5142                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5143                                   NL80211_FLAG_NEED_RTNL,
5144         },
5145         {
5146                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5147                 .doit = nl80211_get_power_save,
5148                 .policy = nl80211_policy,
5149                 /* can be retrieved by unprivileged users */
5150                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5151                                   NL80211_FLAG_NEED_RTNL,
5152         },
5153         {
5154                 .cmd = NL80211_CMD_SET_CQM,
5155                 .doit = nl80211_set_cqm,
5156                 .policy = nl80211_policy,
5157                 .flags = GENL_ADMIN_PERM,
5158                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5159                                   NL80211_FLAG_NEED_RTNL,
5160         },
5161         {
5162                 .cmd = NL80211_CMD_SET_CHANNEL,
5163                 .doit = nl80211_set_channel,
5164                 .policy = nl80211_policy,
5165                 .flags = GENL_ADMIN_PERM,
5166                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5167                                   NL80211_FLAG_NEED_RTNL,
5168         },
5169         {
5170                 .cmd = NL80211_CMD_SET_WDS_PEER,
5171                 .doit = nl80211_set_wds_peer,
5172                 .policy = nl80211_policy,
5173                 .flags = GENL_ADMIN_PERM,
5174                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5175                                   NL80211_FLAG_NEED_RTNL,
5176         },
5177         {
5178                 .cmd = NL80211_CMD_JOIN_MESH,
5179                 .doit = nl80211_join_mesh,
5180                 .policy = nl80211_policy,
5181                 .flags = GENL_ADMIN_PERM,
5182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5183                                   NL80211_FLAG_NEED_RTNL,
5184         },
5185         {
5186                 .cmd = NL80211_CMD_LEAVE_MESH,
5187                 .doit = nl80211_leave_mesh,
5188                 .policy = nl80211_policy,
5189                 .flags = GENL_ADMIN_PERM,
5190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5191                                   NL80211_FLAG_NEED_RTNL,
5192         },
5193 };
5194
5195 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5196         .name = "mlme",
5197 };
5198
5199 /* multicast groups */
5200 static struct genl_multicast_group nl80211_config_mcgrp = {
5201         .name = "config",
5202 };
5203 static struct genl_multicast_group nl80211_scan_mcgrp = {
5204         .name = "scan",
5205 };
5206 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5207         .name = "regulatory",
5208 };
5209
5210 /* notification functions */
5211
5212 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5213 {
5214         struct sk_buff *msg;
5215
5216         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5217         if (!msg)
5218                 return;
5219
5220         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5221                 nlmsg_free(msg);
5222                 return;
5223         }
5224
5225         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5226                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5227 }
5228
5229 static int nl80211_add_scan_req(struct sk_buff *msg,
5230                                 struct cfg80211_registered_device *rdev)
5231 {
5232         struct cfg80211_scan_request *req = rdev->scan_req;
5233         struct nlattr *nest;
5234         int i;
5235
5236         ASSERT_RDEV_LOCK(rdev);
5237
5238         if (WARN_ON(!req))
5239                 return 0;
5240
5241         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5242         if (!nest)
5243                 goto nla_put_failure;
5244         for (i = 0; i < req->n_ssids; i++)
5245                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5246         nla_nest_end(msg, nest);
5247
5248         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5249         if (!nest)
5250                 goto nla_put_failure;
5251         for (i = 0; i < req->n_channels; i++)
5252                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5253         nla_nest_end(msg, nest);
5254
5255         if (req->ie)
5256                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5257
5258         return 0;
5259  nla_put_failure:
5260         return -ENOBUFS;
5261 }
5262
5263 static int nl80211_send_scan_msg(struct sk_buff *msg,
5264                                  struct cfg80211_registered_device *rdev,
5265                                  struct net_device *netdev,
5266                                  u32 pid, u32 seq, int flags,
5267                                  u32 cmd)
5268 {
5269         void *hdr;
5270
5271         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5272         if (!hdr)
5273                 return -1;
5274
5275         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5276         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5277
5278         /* ignore errors and send incomplete event anyway */
5279         nl80211_add_scan_req(msg, rdev);
5280
5281         return genlmsg_end(msg, hdr);
5282
5283  nla_put_failure:
5284         genlmsg_cancel(msg, hdr);
5285         return -EMSGSIZE;
5286 }
5287
5288 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5289                              struct net_device *netdev)
5290 {
5291         struct sk_buff *msg;
5292
5293         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5294         if (!msg)
5295                 return;
5296
5297         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5298                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5299                 nlmsg_free(msg);
5300                 return;
5301         }
5302
5303         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5304                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5305 }
5306
5307 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5308                             struct net_device *netdev)
5309 {
5310         struct sk_buff *msg;
5311
5312         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5313         if (!msg)
5314                 return;
5315
5316         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5317                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5318                 nlmsg_free(msg);
5319                 return;
5320         }
5321
5322         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5323                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5324 }
5325
5326 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5327                                struct net_device *netdev)
5328 {
5329         struct sk_buff *msg;
5330
5331         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5332         if (!msg)
5333                 return;
5334
5335         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5336                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5337                 nlmsg_free(msg);
5338                 return;
5339         }
5340
5341         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5342                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5343 }
5344
5345 /*
5346  * This can happen on global regulatory changes or device specific settings
5347  * based on custom world regulatory domains.
5348  */
5349 void nl80211_send_reg_change_event(struct regulatory_request *request)
5350 {
5351         struct sk_buff *msg;
5352         void *hdr;
5353
5354         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5355         if (!msg)
5356                 return;
5357
5358         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5359         if (!hdr) {
5360                 nlmsg_free(msg);
5361                 return;
5362         }
5363
5364         /* Userspace can always count this one always being set */
5365         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5366
5367         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5368                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5369                            NL80211_REGDOM_TYPE_WORLD);
5370         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5371                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5372                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5373         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5374                  request->intersect)
5375                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5376                            NL80211_REGDOM_TYPE_INTERSECTION);
5377         else {
5378                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5379                            NL80211_REGDOM_TYPE_COUNTRY);
5380                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5381         }
5382
5383         if (wiphy_idx_valid(request->wiphy_idx))
5384                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5385
5386         if (genlmsg_end(msg, hdr) < 0) {
5387                 nlmsg_free(msg);
5388                 return;
5389         }
5390
5391         rcu_read_lock();
5392         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5393                                 GFP_ATOMIC);
5394         rcu_read_unlock();
5395
5396         return;
5397
5398 nla_put_failure:
5399         genlmsg_cancel(msg, hdr);
5400         nlmsg_free(msg);
5401 }
5402
5403 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5404                                     struct net_device *netdev,
5405                                     const u8 *buf, size_t len,
5406                                     enum nl80211_commands cmd, gfp_t gfp)
5407 {
5408         struct sk_buff *msg;
5409         void *hdr;
5410
5411         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5412         if (!msg)
5413                 return;
5414
5415         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5416         if (!hdr) {
5417                 nlmsg_free(msg);
5418                 return;
5419         }
5420
5421         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5422         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5423         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5424
5425         if (genlmsg_end(msg, hdr) < 0) {
5426                 nlmsg_free(msg);
5427                 return;
5428         }
5429
5430         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5431                                 nl80211_mlme_mcgrp.id, gfp);
5432         return;
5433
5434  nla_put_failure:
5435         genlmsg_cancel(msg, hdr);
5436         nlmsg_free(msg);
5437 }
5438
5439 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5440                           struct net_device *netdev, const u8 *buf,
5441                           size_t len, gfp_t gfp)
5442 {
5443         nl80211_send_mlme_event(rdev, netdev, buf, len,
5444                                 NL80211_CMD_AUTHENTICATE, gfp);
5445 }
5446
5447 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5448                            struct net_device *netdev, const u8 *buf,
5449                            size_t len, gfp_t gfp)
5450 {
5451         nl80211_send_mlme_event(rdev, netdev, buf, len,
5452                                 NL80211_CMD_ASSOCIATE, gfp);
5453 }
5454
5455 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5456                          struct net_device *netdev, const u8 *buf,
5457                          size_t len, gfp_t gfp)
5458 {
5459         nl80211_send_mlme_event(rdev, netdev, buf, len,
5460                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5461 }
5462
5463 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5464                            struct net_device *netdev, const u8 *buf,
5465                            size_t len, gfp_t gfp)
5466 {
5467         nl80211_send_mlme_event(rdev, netdev, buf, len,
5468                                 NL80211_CMD_DISASSOCIATE, gfp);
5469 }
5470
5471 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5472                                       struct net_device *netdev, int cmd,
5473                                       const u8 *addr, gfp_t gfp)
5474 {
5475         struct sk_buff *msg;
5476         void *hdr;
5477
5478         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5479         if (!msg)
5480                 return;
5481
5482         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5483         if (!hdr) {
5484                 nlmsg_free(msg);
5485                 return;
5486         }
5487
5488         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5489         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5490         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5491         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5492
5493         if (genlmsg_end(msg, hdr) < 0) {
5494                 nlmsg_free(msg);
5495                 return;
5496         }
5497
5498         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5499                                 nl80211_mlme_mcgrp.id, gfp);
5500         return;
5501
5502  nla_put_failure:
5503         genlmsg_cancel(msg, hdr);
5504         nlmsg_free(msg);
5505 }
5506
5507 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5508                                struct net_device *netdev, const u8 *addr,
5509                                gfp_t gfp)
5510 {
5511         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5512                                   addr, gfp);
5513 }
5514
5515 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5516                                 struct net_device *netdev, const u8 *addr,
5517                                 gfp_t gfp)
5518 {
5519         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5520                                   addr, gfp);
5521 }
5522
5523 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5524                                  struct net_device *netdev, const u8 *bssid,
5525                                  const u8 *req_ie, size_t req_ie_len,
5526                                  const u8 *resp_ie, size_t resp_ie_len,
5527                                  u16 status, gfp_t gfp)
5528 {
5529         struct sk_buff *msg;
5530         void *hdr;
5531
5532         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5533         if (!msg)
5534                 return;
5535
5536         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
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         if (bssid)
5545                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5546         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5547         if (req_ie)
5548                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5549         if (resp_ie)
5550                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5551
5552         if (genlmsg_end(msg, hdr) < 0) {
5553                 nlmsg_free(msg);
5554                 return;
5555         }
5556
5557         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5558                                 nl80211_mlme_mcgrp.id, gfp);
5559         return;
5560
5561  nla_put_failure:
5562         genlmsg_cancel(msg, hdr);
5563         nlmsg_free(msg);
5564
5565 }
5566
5567 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5568                          struct net_device *netdev, const u8 *bssid,
5569                          const u8 *req_ie, size_t req_ie_len,
5570                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5571 {
5572         struct sk_buff *msg;
5573         void *hdr;
5574
5575         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5576         if (!msg)
5577                 return;
5578
5579         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5580         if (!hdr) {
5581                 nlmsg_free(msg);
5582                 return;
5583         }
5584
5585         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5586         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5587         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5588         if (req_ie)
5589                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5590         if (resp_ie)
5591                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5592
5593         if (genlmsg_end(msg, hdr) < 0) {
5594                 nlmsg_free(msg);
5595                 return;
5596         }
5597
5598         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5599                                 nl80211_mlme_mcgrp.id, gfp);
5600         return;
5601
5602  nla_put_failure:
5603         genlmsg_cancel(msg, hdr);
5604         nlmsg_free(msg);
5605
5606 }
5607
5608 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5609                                struct net_device *netdev, u16 reason,
5610                                const u8 *ie, size_t ie_len, bool from_ap)
5611 {
5612         struct sk_buff *msg;
5613         void *hdr;
5614
5615         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5616         if (!msg)
5617                 return;
5618
5619         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
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         if (from_ap && reason)
5628                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5629         if (from_ap)
5630                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5631         if (ie)
5632                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5633
5634         if (genlmsg_end(msg, hdr) < 0) {
5635                 nlmsg_free(msg);
5636                 return;
5637         }
5638
5639         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5640                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5641         return;
5642
5643  nla_put_failure:
5644         genlmsg_cancel(msg, hdr);
5645         nlmsg_free(msg);
5646
5647 }
5648
5649 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5650                              struct net_device *netdev, const u8 *bssid,
5651                              gfp_t gfp)
5652 {
5653         struct sk_buff *msg;
5654         void *hdr;
5655
5656         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5657         if (!msg)
5658                 return;
5659
5660         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5661         if (!hdr) {
5662                 nlmsg_free(msg);
5663                 return;
5664         }
5665
5666         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5667         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5668         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5669
5670         if (genlmsg_end(msg, hdr) < 0) {
5671                 nlmsg_free(msg);
5672                 return;
5673         }
5674
5675         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5676                                 nl80211_mlme_mcgrp.id, gfp);
5677         return;
5678
5679  nla_put_failure:
5680         genlmsg_cancel(msg, hdr);
5681         nlmsg_free(msg);
5682 }
5683
5684 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5685                                  struct net_device *netdev, const u8 *addr,
5686                                  enum nl80211_key_type key_type, int key_id,
5687                                  const u8 *tsc, gfp_t gfp)
5688 {
5689         struct sk_buff *msg;
5690         void *hdr;
5691
5692         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5693         if (!msg)
5694                 return;
5695
5696         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5697         if (!hdr) {
5698                 nlmsg_free(msg);
5699                 return;
5700         }
5701
5702         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5703         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5704         if (addr)
5705                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5706         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5707         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5708         if (tsc)
5709                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5710
5711         if (genlmsg_end(msg, hdr) < 0) {
5712                 nlmsg_free(msg);
5713                 return;
5714         }
5715
5716         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5717                                 nl80211_mlme_mcgrp.id, gfp);
5718         return;
5719
5720  nla_put_failure:
5721         genlmsg_cancel(msg, hdr);
5722         nlmsg_free(msg);
5723 }
5724
5725 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5726                                     struct ieee80211_channel *channel_before,
5727                                     struct ieee80211_channel *channel_after)
5728 {
5729         struct sk_buff *msg;
5730         void *hdr;
5731         struct nlattr *nl_freq;
5732
5733         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5734         if (!msg)
5735                 return;
5736
5737         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5738         if (!hdr) {
5739                 nlmsg_free(msg);
5740                 return;
5741         }
5742
5743         /*
5744          * Since we are applying the beacon hint to a wiphy we know its
5745          * wiphy_idx is valid
5746          */
5747         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5748
5749         /* Before */
5750         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5751         if (!nl_freq)
5752                 goto nla_put_failure;
5753         if (nl80211_msg_put_channel(msg, channel_before))
5754                 goto nla_put_failure;
5755         nla_nest_end(msg, nl_freq);
5756
5757         /* After */
5758         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5759         if (!nl_freq)
5760                 goto nla_put_failure;
5761         if (nl80211_msg_put_channel(msg, channel_after))
5762                 goto nla_put_failure;
5763         nla_nest_end(msg, nl_freq);
5764
5765         if (genlmsg_end(msg, hdr) < 0) {
5766                 nlmsg_free(msg);
5767                 return;
5768         }
5769
5770         rcu_read_lock();
5771         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5772                                 GFP_ATOMIC);
5773         rcu_read_unlock();
5774
5775         return;
5776
5777 nla_put_failure:
5778         genlmsg_cancel(msg, hdr);
5779         nlmsg_free(msg);
5780 }
5781
5782 static void nl80211_send_remain_on_chan_event(
5783         int cmd, struct cfg80211_registered_device *rdev,
5784         struct net_device *netdev, u64 cookie,
5785         struct ieee80211_channel *chan,
5786         enum nl80211_channel_type channel_type,
5787         unsigned int duration, gfp_t gfp)
5788 {
5789         struct sk_buff *msg;
5790         void *hdr;
5791
5792         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5793         if (!msg)
5794                 return;
5795
5796         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5797         if (!hdr) {
5798                 nlmsg_free(msg);
5799                 return;
5800         }
5801
5802         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5803         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5804         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5805         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5806         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5807
5808         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5809                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5810
5811         if (genlmsg_end(msg, hdr) < 0) {
5812                 nlmsg_free(msg);
5813                 return;
5814         }
5815
5816         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5817                                 nl80211_mlme_mcgrp.id, gfp);
5818         return;
5819
5820  nla_put_failure:
5821         genlmsg_cancel(msg, hdr);
5822         nlmsg_free(msg);
5823 }
5824
5825 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5826                                     struct net_device *netdev, u64 cookie,
5827                                     struct ieee80211_channel *chan,
5828                                     enum nl80211_channel_type channel_type,
5829                                     unsigned int duration, gfp_t gfp)
5830 {
5831         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5832                                           rdev, netdev, cookie, chan,
5833                                           channel_type, duration, gfp);
5834 }
5835
5836 void nl80211_send_remain_on_channel_cancel(
5837         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5838         u64 cookie, struct ieee80211_channel *chan,
5839         enum nl80211_channel_type channel_type, gfp_t gfp)
5840 {
5841         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5842                                           rdev, netdev, cookie, chan,
5843                                           channel_type, 0, gfp);
5844 }
5845
5846 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5847                             struct net_device *dev, const u8 *mac_addr,
5848                             struct station_info *sinfo, gfp_t gfp)
5849 {
5850         struct sk_buff *msg;
5851
5852         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5853         if (!msg)
5854                 return;
5855
5856         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5857                 nlmsg_free(msg);
5858                 return;
5859         }
5860
5861         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5862                                 nl80211_mlme_mcgrp.id, gfp);
5863 }
5864
5865 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5866                       struct net_device *netdev, u32 nlpid,
5867                       int freq, const u8 *buf, size_t len, gfp_t gfp)
5868 {
5869         struct sk_buff *msg;
5870         void *hdr;
5871         int err;
5872
5873         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5874         if (!msg)
5875                 return -ENOMEM;
5876
5877         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5878         if (!hdr) {
5879                 nlmsg_free(msg);
5880                 return -ENOMEM;
5881         }
5882
5883         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5884         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5885         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5886         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5887
5888         err = genlmsg_end(msg, hdr);
5889         if (err < 0) {
5890                 nlmsg_free(msg);
5891                 return err;
5892         }
5893
5894         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5895         if (err < 0)
5896                 return err;
5897         return 0;
5898
5899  nla_put_failure:
5900         genlmsg_cancel(msg, hdr);
5901         nlmsg_free(msg);
5902         return -ENOBUFS;
5903 }
5904
5905 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
5906                                  struct net_device *netdev, u64 cookie,
5907                                  const u8 *buf, size_t len, bool ack,
5908                                  gfp_t gfp)
5909 {
5910         struct sk_buff *msg;
5911         void *hdr;
5912
5913         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5914         if (!msg)
5915                 return;
5916
5917         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
5918         if (!hdr) {
5919                 nlmsg_free(msg);
5920                 return;
5921         }
5922
5923         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5924         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5925         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5926         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5927         if (ack)
5928                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
5929
5930         if (genlmsg_end(msg, hdr) < 0) {
5931                 nlmsg_free(msg);
5932                 return;
5933         }
5934
5935         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
5936         return;
5937
5938  nla_put_failure:
5939         genlmsg_cancel(msg, hdr);
5940         nlmsg_free(msg);
5941 }
5942
5943 void
5944 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
5945                              struct net_device *netdev,
5946                              enum nl80211_cqm_rssi_threshold_event rssi_event,
5947                              gfp_t gfp)
5948 {
5949         struct sk_buff *msg;
5950         struct nlattr *pinfoattr;
5951         void *hdr;
5952
5953         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5954         if (!msg)
5955                 return;
5956
5957         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
5958         if (!hdr) {
5959                 nlmsg_free(msg);
5960                 return;
5961         }
5962
5963         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5964         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5965
5966         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
5967         if (!pinfoattr)
5968                 goto nla_put_failure;
5969
5970         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
5971                     rssi_event);
5972
5973         nla_nest_end(msg, pinfoattr);
5974
5975         if (genlmsg_end(msg, hdr) < 0) {
5976                 nlmsg_free(msg);
5977                 return;
5978         }
5979
5980         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5981                                 nl80211_mlme_mcgrp.id, gfp);
5982         return;
5983
5984  nla_put_failure:
5985         genlmsg_cancel(msg, hdr);
5986         nlmsg_free(msg);
5987 }
5988
5989 void
5990 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
5991                                 struct net_device *netdev, const u8 *peer,
5992                                 u32 num_packets, gfp_t gfp)
5993 {
5994         struct sk_buff *msg;
5995         struct nlattr *pinfoattr;
5996         void *hdr;
5997
5998         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5999         if (!msg)
6000                 return;
6001
6002         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6003         if (!hdr) {
6004                 nlmsg_free(msg);
6005                 return;
6006         }
6007
6008         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6009         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6010         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6011
6012         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6013         if (!pinfoattr)
6014                 goto nla_put_failure;
6015
6016         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6017
6018         nla_nest_end(msg, pinfoattr);
6019
6020         if (genlmsg_end(msg, hdr) < 0) {
6021                 nlmsg_free(msg);
6022                 return;
6023         }
6024
6025         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6026                                 nl80211_mlme_mcgrp.id, gfp);
6027         return;
6028
6029  nla_put_failure:
6030         genlmsg_cancel(msg, hdr);
6031         nlmsg_free(msg);
6032 }
6033
6034 static int nl80211_netlink_notify(struct notifier_block * nb,
6035                                   unsigned long state,
6036                                   void *_notify)
6037 {
6038         struct netlink_notify *notify = _notify;
6039         struct cfg80211_registered_device *rdev;
6040         struct wireless_dev *wdev;
6041
6042         if (state != NETLINK_URELEASE)
6043                 return NOTIFY_DONE;
6044
6045         rcu_read_lock();
6046
6047         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6048                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6049                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6050
6051         rcu_read_unlock();
6052
6053         return NOTIFY_DONE;
6054 }
6055
6056 static struct notifier_block nl80211_netlink_notifier = {
6057         .notifier_call = nl80211_netlink_notify,
6058 };
6059
6060 /* initialisation/exit functions */
6061
6062 int nl80211_init(void)
6063 {
6064         int err;
6065
6066         err = genl_register_family_with_ops(&nl80211_fam,
6067                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6068         if (err)
6069                 return err;
6070
6071         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6072         if (err)
6073                 goto err_out;
6074
6075         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6076         if (err)
6077                 goto err_out;
6078
6079         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6080         if (err)
6081                 goto err_out;
6082
6083         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6084         if (err)
6085                 goto err_out;
6086
6087 #ifdef CONFIG_NL80211_TESTMODE
6088         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6089         if (err)
6090                 goto err_out;
6091 #endif
6092
6093         err = netlink_register_notifier(&nl80211_netlink_notifier);
6094         if (err)
6095                 goto err_out;
6096
6097         return 0;
6098  err_out:
6099         genl_unregister_family(&nl80211_fam);
6100         return err;
6101 }
6102
6103 void nl80211_exit(void)
6104 {
6105         netlink_unregister_notifier(&nl80211_netlink_notifier);
6106         genl_unregister_family(&nl80211_fam);
6107 }