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 bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* internal helper: get rdev and dev */
  50 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  51                                        struct cfg80211_registered_device **rdev,
  52                                        struct net_device **dev)
  53 {
  54         struct nlattr **attrs = info->attrs;
  55         int ifindex;
  56
  57         if (!attrs[NL80211_ATTR_IFINDEX])
  58                 return -EINVAL;
  59
  60         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  61         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  62         if (!*dev)
  63                 return -ENODEV;
  64
  65         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  66         if (IS_ERR(*rdev)) {
  67                 dev_put(*dev);
  68                 return PTR_ERR(*rdev);
  69         }
  70
  71         return 0;
  72 }
  73
  74 /* policy for the attributes */
  75 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  76         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  77         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  78                                       .len = 20-1 },
  79         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  80         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  81         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  82         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  83         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  84         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  85         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  86         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  87
  88         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  89         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  90         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  91
  92         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  93         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  94
  95         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  96         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  97                                     .len = WLAN_MAX_KEY_LEN },
  98         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  99         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 100         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 101         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 102         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 103
 104         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 105         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 106         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 107                                        .len = IEEE80211_MAX_DATA_LEN },
 108         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 109                                        .len = IEEE80211_MAX_DATA_LEN },
 110         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 111         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 112         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 113         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 114                                                .len = NL80211_MAX_SUPP_RATES },
 115         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 116         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 117         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 118         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 119                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 120         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 121
 122         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 123         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 124
 125         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 126         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 127         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 128         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 129                                            .len = NL80211_MAX_SUPP_RATES },
 130         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 131
 132         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 133         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 134
 135         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 136
 137         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 138         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 139                               .len = IEEE80211_MAX_DATA_LEN },
 140         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 141         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 142
 143         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 144                                 .len = IEEE80211_MAX_SSID_LEN },
 145         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 146         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 147         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 149         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 150         [NL80211_ATTR_STA_FLAGS2] = {
 151                 .len = sizeof(struct nl80211_sta_flag_update),
 152         },
 153         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 154         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 155         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 156         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 157         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 158         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 159         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 160         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 161         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 162                                  .len = WLAN_PMKID_LEN },
 163         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 164         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 165         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 166         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 167                                  .len = IEEE80211_MAX_DATA_LEN },
 168         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 169         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 170         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 171         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 172         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 173         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 174         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 175         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 176         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 178         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 179         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 180         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 181         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 182         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 183         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 184         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 185         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 186         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 187         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 188                                          .len = IEEE80211_MAX_DATA_LEN },
 189         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 190                                          .len = IEEE80211_MAX_DATA_LEN },
 191         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 192         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 193         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 194         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 195         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 196         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 197         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 198         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 199         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 200         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 201                                       .len = IEEE80211_MAX_DATA_LEN },
 202         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 203         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 204         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 205                 .len = NL80211_HT_CAPABILITY_LEN
 206         },
 207         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 208 };
 209
 210 /* policy for the key attributes */
 211 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 212         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 213         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 214         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 215         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 216         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 217         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 218         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 219         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 220 };
 221
 222 /* policy for the key default flags */
 223 static const struct nla_policy
 224 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 225         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 226         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 227 };
 228
 229 /* policy for WoWLAN attributes */
 230 static const struct nla_policy
 231 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 232         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 233         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 234         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 235         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 236         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 237         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 238         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 239         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 240 };
 241
 242 /* policy for GTK rekey offload attributes */
 243 static const struct nla_policy
 244 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 245         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 246         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 247         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 248 };
 249
 250 static const struct nla_policy
 251 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 252         [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
 253                                                  .len = IEEE80211_MAX_SSID_LEN },
 254 };
 255
 256 /* ifidx get helper */
 257 static int nl80211_get_ifidx(struct netlink_callback *cb)
 258 {
 259         int res;
 260
 261         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 262                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 263                           nl80211_policy);
 264         if (res)
 265                 return res;
 266
 267         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 268                 return -EINVAL;
 269
 270         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 271         if (!res)
 272                 return -EINVAL;
 273         return res;
 274 }
 275
 276 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 277                                        struct netlink_callback *cb,
 278                                        struct cfg80211_registered_device **rdev,
 279                                        struct net_device **dev)
 280 {
 281         int ifidx = cb->args[0];
 282         int err;
 283
 284         if (!ifidx)
 285                 ifidx = nl80211_get_ifidx(cb);
 286         if (ifidx < 0)
 287                 return ifidx;
 288
 289         cb->args[0] = ifidx;
 290
 291         rtnl_lock();
 292
 293         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 294         if (!*dev) {
 295                 err = -ENODEV;
 296                 goto out_rtnl;
 297         }
 298
 299         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 300         if (IS_ERR(*rdev)) {
 301                 err = PTR_ERR(*rdev);
 302                 goto out_rtnl;
 303         }
 304
 305         return 0;
 306  out_rtnl:
 307         rtnl_unlock();
 308         return err;
 309 }
 310
 311 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 312 {
 313         cfg80211_unlock_rdev(rdev);
 314         rtnl_unlock();
 315 }
 316
 317 /* IE validation */
 318 static bool is_valid_ie_attr(const struct nlattr *attr)
 319 {
 320         const u8 *pos;
 321         int len;
 322
 323         if (!attr)
 324                 return true;
 325
 326         pos = nla_data(attr);
 327         len = nla_len(attr);
 328
 329         while (len) {
 330                 u8 elemlen;
 331
 332                 if (len < 2)
 333                         return false;
 334                 len -= 2;
 335
 336                 elemlen = pos[1];
 337                 if (elemlen > len)
 338                         return false;
 339
 340                 len -= elemlen;
 341                 pos += 2 + elemlen;
 342         }
 343
 344         return true;
 345 }
 346
 347 /* message building helper */
 348 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 349                                    int flags, u8 cmd)
 350 {
 351         /* since there is no private header just add the generic one */
 352         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 353 }
 354
 355 static int nl80211_msg_put_channel(struct sk_buff *msg,
 356                                    struct ieee80211_channel *chan)
 357 {
 358         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 359                     chan->center_freq);
 360
 361         if (chan->flags & IEEE80211_CHAN_DISABLED)
 362                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 363         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 364                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 365         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 366                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 367         if (chan->flags & IEEE80211_CHAN_RADAR)
 368                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 369
 370         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 371                     DBM_TO_MBM(chan->max_power));
 372
 373         return 0;
 374
 375  nla_put_failure:
 376         return -ENOBUFS;
 377 }
 378
 379 /* netlink command implementations */
 380
 381 struct key_parse {
 382         struct key_params p;
 383         int idx;
 384         int type;
 385         bool def, defmgmt;
 386         bool def_uni, def_multi;
 387 };
 388
 389 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 390 {
 391         struct nlattr *tb[NL80211_KEY_MAX + 1];
 392         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 393                                    nl80211_key_policy);
 394         if (err)
 395                 return err;
 396
 397         k->def = !!tb[NL80211_KEY_DEFAULT];
 398         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 399
 400         if (k->def) {
 401                 k->def_uni = true;
 402                 k->def_multi = true;
 403         }
 404         if (k->defmgmt)
 405                 k->def_multi = true;
 406
 407         if (tb[NL80211_KEY_IDX])
 408                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 409
 410         if (tb[NL80211_KEY_DATA]) {
 411                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 412                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 413         }
 414
 415         if (tb[NL80211_KEY_SEQ]) {
 416                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 417                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 418         }
 419
 420         if (tb[NL80211_KEY_CIPHER])
 421                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 422
 423         if (tb[NL80211_KEY_TYPE]) {
 424                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 425                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 426                         return -EINVAL;
 427         }
 428
 429         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 430                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 431                 int err = nla_parse_nested(kdt,
 432                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 433                                            tb[NL80211_KEY_DEFAULT_TYPES],
 434                                            nl80211_key_default_policy);
 435                 if (err)
 436                         return err;
 437
 438                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 439                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 446 {
 447         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 448                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 449                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 450         }
 451
 452         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 453                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 454                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 455         }
 456
 457         if (info->attrs[NL80211_ATTR_KEY_IDX])
 458                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 459
 460         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 461                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 462
 463         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 464         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 465
 466         if (k->def) {
 467                 k->def_uni = true;
 468                 k->def_multi = true;
 469         }
 470         if (k->defmgmt)
 471                 k->def_multi = true;
 472
 473         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 474                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 475                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 476                         return -EINVAL;
 477         }
 478
 479         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 480                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 481                 int err = nla_parse_nested(
 482                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 483                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 484                                 nl80211_key_default_policy);
 485                 if (err)
 486                         return err;
 487
 488                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 489                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 490         }
 491
 492         return 0;
 493 }
 494
 495 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 496 {
 497         int err;
 498
 499         memset(k, 0, sizeof(*k));
 500         k->idx = -1;
 501         k->type = -1;
 502
 503         if (info->attrs[NL80211_ATTR_KEY])
 504                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 505         else
 506                 err = nl80211_parse_key_old(info, k);
 507
 508         if (err)
 509                 return err;
 510
 511         if (k->def && k->defmgmt)
 512                 return -EINVAL;
 513
 514         if (k->defmgmt) {
 515                 if (k->def_uni || !k->def_multi)
 516                         return -EINVAL;
 517         }
 518
 519         if (k->idx != -1) {
 520                 if (k->defmgmt) {
 521                         if (k->idx < 4 || k->idx > 5)
 522                                 return -EINVAL;
 523                 } else if (k->def) {
 524                         if (k->idx < 0 || k->idx > 3)
 525                                 return -EINVAL;
 526                 } else {
 527                         if (k->idx < 0 || k->idx > 5)
 528                                 return -EINVAL;
 529                 }
 530         }
 531
 532         return 0;
 533 }
 534
 535 static struct cfg80211_cached_keys *
 536 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 537                        struct nlattr *keys)
 538 {
 539         struct key_parse parse;
 540         struct nlattr *key;
 541         struct cfg80211_cached_keys *result;
 542         int rem, err, def = 0;
 543
 544         result = kzalloc(sizeof(*result), GFP_KERNEL);
 545         if (!result)
 546                 return ERR_PTR(-ENOMEM);
 547
 548         result->def = -1;
 549         result->defmgmt = -1;
 550
 551         nla_for_each_nested(key, keys, rem) {
 552                 memset(&parse, 0, sizeof(parse));
 553                 parse.idx = -1;
 554
 555                 err = nl80211_parse_key_new(key, &parse);
 556                 if (err)
 557                         goto error;
 558                 err = -EINVAL;
 559                 if (!parse.p.key)
 560                         goto error;
 561                 if (parse.idx < 0 || parse.idx > 4)
 562                         goto error;
 563                 if (parse.def) {
 564                         if (def)
 565                                 goto error;
 566                         def = 1;
 567                         result->def = parse.idx;
 568                         if (!parse.def_uni || !parse.def_multi)
 569                                 goto error;
 570                 } else if (parse.defmgmt)
 571                         goto error;
 572                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 573                                                      parse.idx, false, NULL);
 574                 if (err)
 575                         goto error;
 576                 result->params[parse.idx].cipher = parse.p.cipher;
 577                 result->params[parse.idx].key_len = parse.p.key_len;
 578                 result->params[parse.idx].key = result->data[parse.idx];
 579                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 580         }
 581
 582         return result;
 583  error:
 584         kfree(result);
 585         return ERR_PTR(err);
 586 }
 587
 588 static int nl80211_key_allowed(struct wireless_dev *wdev)
 589 {
 590         ASSERT_WDEV_LOCK(wdev);
 591
 592         switch (wdev->iftype) {
 593         case NL80211_IFTYPE_AP:
 594         case NL80211_IFTYPE_AP_VLAN:
 595         case NL80211_IFTYPE_P2P_GO:
 596         case NL80211_IFTYPE_MESH_POINT:
 597                 break;
 598         case NL80211_IFTYPE_ADHOC:
 599                 if (!wdev->current_bss)
 600                         return -ENOLINK;
 601                 break;
 602         case NL80211_IFTYPE_STATION:
 603         case NL80211_IFTYPE_P2P_CLIENT:
 604                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 605                         return -ENOLINK;
 606                 break;
 607         default:
 608                 return -EINVAL;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 615 {
 616         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 617         int i;
 618
 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         return 0;
 632
 633 nla_put_failure:
 634         return -ENOBUFS;
 635 }
 636
 637 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 638                                           struct sk_buff *msg)
 639 {
 640         struct nlattr *nl_combis;
 641         int i, j;
 642
 643         nl_combis = nla_nest_start(msg,
 644                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 645         if (!nl_combis)
 646                 goto nla_put_failure;
 647
 648         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 649                 const struct ieee80211_iface_combination *c;
 650                 struct nlattr *nl_combi, *nl_limits;
 651
 652                 c = &wiphy->iface_combinations[i];
 653
 654                 nl_combi = nla_nest_start(msg, i + 1);
 655                 if (!nl_combi)
 656                         goto nla_put_failure;
 657
 658                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 659                 if (!nl_limits)
 660                         goto nla_put_failure;
 661
 662                 for (j = 0; j < c->n_limits; j++) {
 663                         struct nlattr *nl_limit;
 664
 665                         nl_limit = nla_nest_start(msg, j + 1);
 666                         if (!nl_limit)
 667                                 goto nla_put_failure;
 668                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 669                                     c->limits[j].max);
 670                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 671                                                 c->limits[j].types))
 672                                 goto nla_put_failure;
 673                         nla_nest_end(msg, nl_limit);
 674                 }
 675
 676                 nla_nest_end(msg, nl_limits);
 677
 678                 if (c->beacon_int_infra_match)
 679                         NLA_PUT_FLAG(msg,
 680                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 681                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 682                             c->num_different_channels);
 683                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 684                             c->max_interfaces);
 685
 686                 nla_nest_end(msg, nl_combi);
 687         }
 688
 689         nla_nest_end(msg, nl_combis);
 690
 691         return 0;
 692 nla_put_failure:
 693         return -ENOBUFS;
 694 }
 695
 696 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 697                               struct cfg80211_registered_device *dev)
 698 {
 699         void *hdr;
 700         struct nlattr *nl_bands, *nl_band;
 701         struct nlattr *nl_freqs, *nl_freq;
 702         struct nlattr *nl_rates, *nl_rate;
 703         struct nlattr *nl_cmds;
 704         enum ieee80211_band band;
 705         struct ieee80211_channel *chan;
 706         struct ieee80211_rate *rate;
 707         int i;
 708         const struct ieee80211_txrx_stypes *mgmt_stypes =
 709                                 dev->wiphy.mgmt_stypes;
 710
 711         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 712         if (!hdr)
 713                 return -1;
 714
 715         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 716         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 717
 718         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 719                     cfg80211_rdev_list_generation);
 720
 721         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 722                    dev->wiphy.retry_short);
 723         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 724                    dev->wiphy.retry_long);
 725         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 726                     dev->wiphy.frag_threshold);
 727         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 728                     dev->wiphy.rts_threshold);
 729         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 730                     dev->wiphy.coverage_class);
 731         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 732                    dev->wiphy.max_scan_ssids);
 733         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 734                    dev->wiphy.max_sched_scan_ssids);
 735         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 736                     dev->wiphy.max_scan_ie_len);
 737         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 738                     dev->wiphy.max_sched_scan_ie_len);
 739         NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 740                    dev->wiphy.max_match_sets);
 741
 742         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 743                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 744         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 745                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 746         if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
 747                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
 748         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 749                 NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
 750         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
 751                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
 752         if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
 753                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
 754
 755         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 756                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 757                 dev->wiphy.cipher_suites);
 758
 759         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 760                    dev->wiphy.max_num_pmkids);
 761
 762         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 763                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 764
 765         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 766                     dev->wiphy.available_antennas_tx);
 767         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 768                     dev->wiphy.available_antennas_rx);
 769
 770         if (dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD)
 771                 NLA_PUT_U32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 772                             dev->wiphy.probe_resp_offload);
 773
 774         if ((dev->wiphy.available_antennas_tx ||
 775              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 776                 u32 tx_ant = 0, rx_ant = 0;
 777                 int res;
 778                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 779                 if (!res) {
 780                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 781                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 782                 }
 783         }
 784
 785         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 786                                 dev->wiphy.interface_modes))
 787                 goto nla_put_failure;
 788
 789         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 790         if (!nl_bands)
 791                 goto nla_put_failure;
 792
 793         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 794                 if (!dev->wiphy.bands[band])
 795                         continue;
 796
 797                 nl_band = nla_nest_start(msg, band);
 798                 if (!nl_band)
 799                         goto nla_put_failure;
 800
 801                 /* add HT info */
 802                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 803                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 804                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 805                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 806                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 807                                 dev->wiphy.bands[band]->ht_cap.cap);
 808                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 809                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 810                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 811                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 812                 }
 813
 814                 /* add frequencies */
 815                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 816                 if (!nl_freqs)
 817                         goto nla_put_failure;
 818
 819                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 820                         nl_freq = nla_nest_start(msg, i);
 821                         if (!nl_freq)
 822                                 goto nla_put_failure;
 823
 824                         chan = &dev->wiphy.bands[band]->channels[i];
 825
 826                         if (nl80211_msg_put_channel(msg, chan))
 827                                 goto nla_put_failure;
 828
 829                         nla_nest_end(msg, nl_freq);
 830                 }
 831
 832                 nla_nest_end(msg, nl_freqs);
 833
 834                 /* add bitrates */
 835                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 836                 if (!nl_rates)
 837                         goto nla_put_failure;
 838
 839                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 840                         nl_rate = nla_nest_start(msg, i);
 841                         if (!nl_rate)
 842                                 goto nla_put_failure;
 843
 844                         rate = &dev->wiphy.bands[band]->bitrates[i];
 845                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 846                                     rate->bitrate);
 847                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 848                                 NLA_PUT_FLAG(msg,
 849                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 850
 851                         nla_nest_end(msg, nl_rate);
 852                 }
 853
 854                 nla_nest_end(msg, nl_rates);
 855
 856                 nla_nest_end(msg, nl_band);
 857         }
 858         nla_nest_end(msg, nl_bands);
 859
 860         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 861         if (!nl_cmds)
 862                 goto nla_put_failure;
 863
 864         i = 0;
 865 #define CMD(op, n)                                              \
 866          do {                                                   \
 867                 if (dev->ops->op) {                             \
 868                         i++;                                    \
 869                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 870                 }                                               \
 871         } while (0)
 872
 873         CMD(add_virtual_intf, NEW_INTERFACE);
 874         CMD(change_virtual_intf, SET_INTERFACE);
 875         CMD(add_key, NEW_KEY);
 876         CMD(add_beacon, NEW_BEACON);
 877         CMD(add_station, NEW_STATION);
 878         CMD(add_mpath, NEW_MPATH);
 879         CMD(update_mesh_config, SET_MESH_CONFIG);
 880         CMD(change_bss, SET_BSS);
 881         CMD(auth, AUTHENTICATE);
 882         CMD(assoc, ASSOCIATE);
 883         CMD(deauth, DEAUTHENTICATE);
 884         CMD(disassoc, DISASSOCIATE);
 885         CMD(join_ibss, JOIN_IBSS);
 886         CMD(join_mesh, JOIN_MESH);
 887         CMD(set_pmksa, SET_PMKSA);
 888         CMD(del_pmksa, DEL_PMKSA);
 889         CMD(flush_pmksa, FLUSH_PMKSA);
 890         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 891                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 892         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 893         CMD(mgmt_tx, FRAME);
 894         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 895         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 896                 i++;
 897                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 898         }
 899         CMD(set_channel, SET_CHANNEL);
 900         CMD(set_wds_peer, SET_WDS_PEER);
 901         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 902                 CMD(tdls_mgmt, TDLS_MGMT);
 903                 CMD(tdls_oper, TDLS_OPER);
 904         }
 905         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 906                 CMD(sched_scan_start, START_SCHED_SCAN);
 907         CMD(probe_client, PROBE_CLIENT);
 908         CMD(set_noack_map, SET_NOACK_MAP);
 909         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 910                 i++;
 911                 NLA_PUT_U32(msg, i, NL80211_CMD_REGISTER_BEACONS);
 912         }
 913
 914 #ifdef CONFIG_NL80211_TESTMODE
 915         CMD(testmode_cmd, TESTMODE);
 916 #endif
 917
 918 #undef CMD
 919
 920         if (dev->ops->connect || dev->ops->auth) {
 921                 i++;
 922                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 923         }
 924
 925         if (dev->ops->disconnect || dev->ops->deauth) {
 926                 i++;
 927                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 928         }
 929
 930         nla_nest_end(msg, nl_cmds);
 931
 932         if (dev->ops->remain_on_channel &&
 933             dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 934                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 935                             dev->wiphy.max_remain_on_channel_duration);
 936
 937         if (dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX)
 938                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 939
 940         if (mgmt_stypes) {
 941                 u16 stypes;
 942                 struct nlattr *nl_ftypes, *nl_ifs;
 943                 enum nl80211_iftype ift;
 944
 945                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 946                 if (!nl_ifs)
 947                         goto nla_put_failure;
 948
 949                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 950                         nl_ftypes = nla_nest_start(msg, ift);
 951                         if (!nl_ftypes)
 952                                 goto nla_put_failure;
 953                         i = 0;
 954                         stypes = mgmt_stypes[ift].tx;
 955                         while (stypes) {
 956                                 if (stypes & 1)
 957                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 958                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 959                                 stypes >>= 1;
 960                                 i++;
 961                         }
 962                         nla_nest_end(msg, nl_ftypes);
 963                 }
 964
 965                 nla_nest_end(msg, nl_ifs);
 966
 967                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 968                 if (!nl_ifs)
 969                         goto nla_put_failure;
 970
 971                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 972                         nl_ftypes = nla_nest_start(msg, ift);
 973                         if (!nl_ftypes)
 974                                 goto nla_put_failure;
 975                         i = 0;
 976                         stypes = mgmt_stypes[ift].rx;
 977                         while (stypes) {
 978                                 if (stypes & 1)
 979                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 980                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 981                                 stypes >>= 1;
 982                                 i++;
 983                         }
 984                         nla_nest_end(msg, nl_ftypes);
 985                 }
 986                 nla_nest_end(msg, nl_ifs);
 987         }
 988
 989         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 990                 struct nlattr *nl_wowlan;
 991
 992                 nl_wowlan = nla_nest_start(msg,
 993                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 994                 if (!nl_wowlan)
 995                         goto nla_put_failure;
 996
 997                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 998                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 999                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
1000                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
1001                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
1002                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
1003                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
1004                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
1005                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
1006                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
1007                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
1008                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
1009                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
1010                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
1011                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
1012                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
1013                 if (dev->wiphy.wowlan.n_patterns) {
1014                         struct nl80211_wowlan_pattern_support pat = {
1015                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1016                                 .min_pattern_len =
1017                                         dev->wiphy.wowlan.pattern_min_len,
1018                                 .max_pattern_len =
1019                                         dev->wiphy.wowlan.pattern_max_len,
1020                         };
1021                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1022                                 sizeof(pat), &pat);
1023                 }
1024
1025                 nla_nest_end(msg, nl_wowlan);
1026         }
1027
1028         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1029                                 dev->wiphy.software_iftypes))
1030                 goto nla_put_failure;
1031
1032         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1033                 goto nla_put_failure;
1034
1035         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME)
1036                 NLA_PUT_U32(msg, NL80211_ATTR_DEVICE_AP_SME,
1037                             dev->wiphy.ap_sme_capa);
1038
1039         NLA_PUT_U32(msg, NL80211_ATTR_FEATURE_FLAGS, dev->wiphy.features);
1040
1041         if (dev->wiphy.ht_capa_mod_mask)
1042                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1043                         sizeof(*dev->wiphy.ht_capa_mod_mask),
1044                         dev->wiphy.ht_capa_mod_mask);
1045
1046         return genlmsg_end(msg, hdr);
1047
1048  nla_put_failure:
1049         genlmsg_cancel(msg, hdr);
1050         return -EMSGSIZE;
1051 }
1052
1053 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1054 {
1055         int idx = 0;
1056         int start = cb->args[0];
1057         struct cfg80211_registered_device *dev;
1058
1059         mutex_lock(&cfg80211_mutex);
1060         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1061                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1062                         continue;
1063                 if (++idx <= start)
1064                         continue;
1065                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1066                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1067                                        dev) < 0) {
1068                         idx--;
1069                         break;
1070                 }
1071         }
1072         mutex_unlock(&cfg80211_mutex);
1073
1074         cb->args[0] = idx;
1075
1076         return skb->len;
1077 }
1078
1079 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1080 {
1081         struct sk_buff *msg;
1082         struct cfg80211_registered_device *dev = info->user_ptr[0];
1083
1084         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1085         if (!msg)
1086                 return -ENOMEM;
1087
1088         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1089                 nlmsg_free(msg);
1090                 return -ENOBUFS;
1091         }
1092
1093         return genlmsg_reply(msg, info);
1094 }
1095
1096 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1097         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1098         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1099         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1100         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1101         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1102 };
1103
1104 static int parse_txq_params(struct nlattr *tb[],
1105                             struct ieee80211_txq_params *txq_params)
1106 {
1107         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1108             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1109             !tb[NL80211_TXQ_ATTR_AIFS])
1110                 return -EINVAL;
1111
1112         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1113         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1114         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1115         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1116         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1117
1118         return 0;
1119 }
1120
1121 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1122 {
1123         /*
1124          * You can only set the channel explicitly for AP, mesh
1125          * and WDS type interfaces; all others have their channel
1126          * managed via their respective "establish a connection"
1127          * command (connect, join, ...)
1128          *
1129          * Monitors are special as they are normally slaved to
1130          * whatever else is going on, so they behave as though
1131          * you tried setting the wiphy channel itself.
1132          */
1133         return !wdev ||
1134                 wdev->iftype == NL80211_IFTYPE_AP ||
1135                 wdev->iftype == NL80211_IFTYPE_WDS ||
1136                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1137                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1138                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1139 }
1140
1141 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1142                                  struct wireless_dev *wdev,
1143                                  struct genl_info *info)
1144 {
1145         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1146         u32 freq;
1147         int result;
1148
1149         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1150                 return -EINVAL;
1151
1152         if (!nl80211_can_set_dev_channel(wdev))
1153                 return -EOPNOTSUPP;
1154
1155         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1156                 channel_type = nla_get_u32(info->attrs[
1157                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1158                 if (channel_type != NL80211_CHAN_NO_HT &&
1159                     channel_type != NL80211_CHAN_HT20 &&
1160                     channel_type != NL80211_CHAN_HT40PLUS &&
1161                     channel_type != NL80211_CHAN_HT40MINUS)
1162                         return -EINVAL;
1163         }
1164
1165         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1166
1167         mutex_lock(&rdev->devlist_mtx);
1168         if (wdev) {
1169                 wdev_lock(wdev);
1170                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1171                 wdev_unlock(wdev);
1172         } else {
1173                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1174         }
1175         mutex_unlock(&rdev->devlist_mtx);
1176
1177         return result;
1178 }
1179
1180 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1181 {
1182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1183         struct net_device *netdev = info->user_ptr[1];
1184
1185         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1186 }
1187
1188 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1189 {
1190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1191         struct net_device *dev = info->user_ptr[1];
1192         struct wireless_dev *wdev = dev->ieee80211_ptr;
1193         const u8 *bssid;
1194
1195         if (!info->attrs[NL80211_ATTR_MAC])
1196                 return -EINVAL;
1197
1198         if (netif_running(dev))
1199                 return -EBUSY;
1200
1201         if (!rdev->ops->set_wds_peer)
1202                 return -EOPNOTSUPP;
1203
1204         if (wdev->iftype != NL80211_IFTYPE_WDS)
1205                 return -EOPNOTSUPP;
1206
1207         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1208         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1209 }
1210
1211
1212 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1213 {
1214         struct cfg80211_registered_device *rdev;
1215         struct net_device *netdev = NULL;
1216         struct wireless_dev *wdev;
1217         int result = 0, rem_txq_params = 0;
1218         struct nlattr *nl_txq_params;
1219         u32 changed;
1220         u8 retry_short = 0, retry_long = 0;
1221         u32 frag_threshold = 0, rts_threshold = 0;
1222         u8 coverage_class = 0;
1223
1224         /*
1225          * Try to find the wiphy and netdev. Normally this
1226          * function shouldn't need the netdev, but this is
1227          * done for backward compatibility -- previously
1228          * setting the channel was done per wiphy, but now
1229          * it is per netdev. Previous userland like hostapd
1230          * also passed a netdev to set_wiphy, so that it is
1231          * possible to let that go to the right netdev!
1232          */
1233         mutex_lock(&cfg80211_mutex);
1234
1235         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1236                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1237
1238                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1239                 if (netdev && netdev->ieee80211_ptr) {
1240                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1241                         mutex_lock(&rdev->mtx);
1242                 } else
1243                         netdev = NULL;
1244         }
1245
1246         if (!netdev) {
1247                 rdev = __cfg80211_rdev_from_info(info);
1248                 if (IS_ERR(rdev)) {
1249                         mutex_unlock(&cfg80211_mutex);
1250                         return PTR_ERR(rdev);
1251                 }
1252                 wdev = NULL;
1253                 netdev = NULL;
1254                 result = 0;
1255
1256                 mutex_lock(&rdev->mtx);
1257         } else if (netif_running(netdev) &&
1258                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1259                 wdev = netdev->ieee80211_ptr;
1260         else
1261                 wdev = NULL;
1262
1263         /*
1264          * end workaround code, by now the rdev is available
1265          * and locked, and wdev may or may not be NULL.
1266          */
1267
1268         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1269                 result = cfg80211_dev_rename(
1270                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1271
1272         mutex_unlock(&cfg80211_mutex);
1273
1274         if (result)
1275                 goto bad_res;
1276
1277         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1278                 struct ieee80211_txq_params txq_params;
1279                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1280
1281                 if (!rdev->ops->set_txq_params) {
1282                         result = -EOPNOTSUPP;
1283                         goto bad_res;
1284                 }
1285
1286                 if (!netdev) {
1287                         result = -EINVAL;
1288                         goto bad_res;
1289                 }
1290
1291                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1292                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1293                         result = -EINVAL;
1294                         goto bad_res;
1295                 }
1296
1297                 nla_for_each_nested(nl_txq_params,
1298                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1299                                     rem_txq_params) {
1300                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1301                                   nla_data(nl_txq_params),
1302                                   nla_len(nl_txq_params),
1303                                   txq_params_policy);
1304                         result = parse_txq_params(tb, &txq_params);
1305                         if (result)
1306                                 goto bad_res;
1307
1308                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1309                                                            netdev,
1310                                                            &txq_params);
1311                         if (result)
1312                                 goto bad_res;
1313                 }
1314         }
1315
1316         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1317                 result = __nl80211_set_channel(rdev, wdev, info);
1318                 if (result)
1319                         goto bad_res;
1320         }
1321
1322         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1323                 enum nl80211_tx_power_setting type;
1324                 int idx, mbm = 0;
1325
1326                 if (!rdev->ops->set_tx_power) {
1327                         result = -EOPNOTSUPP;
1328                         goto bad_res;
1329                 }
1330
1331                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1332                 type = nla_get_u32(info->attrs[idx]);
1333
1334                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1335                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1336                         result = -EINVAL;
1337                         goto bad_res;
1338                 }
1339
1340                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1341                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1342                         mbm = nla_get_u32(info->attrs[idx]);
1343                 }
1344
1345                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1346                 if (result)
1347                         goto bad_res;
1348         }
1349
1350         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1351             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1352                 u32 tx_ant, rx_ant;
1353                 if ((!rdev->wiphy.available_antennas_tx &&
1354                      !rdev->wiphy.available_antennas_rx) ||
1355                     !rdev->ops->set_antenna) {
1356                         result = -EOPNOTSUPP;
1357                         goto bad_res;
1358                 }
1359
1360                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1361                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1362
1363                 /* reject antenna configurations which don't match the
1364                  * available antenna masks, except for the "all" mask */
1365                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1366                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1367                         result = -EINVAL;
1368                         goto bad_res;
1369                 }
1370
1371                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1372                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1373
1374                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1375                 if (result)
1376                         goto bad_res;
1377         }
1378
1379         changed = 0;
1380
1381         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1382                 retry_short = nla_get_u8(
1383                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1384                 if (retry_short == 0) {
1385                         result = -EINVAL;
1386                         goto bad_res;
1387                 }
1388                 changed |= WIPHY_PARAM_RETRY_SHORT;
1389         }
1390
1391         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1392                 retry_long = nla_get_u8(
1393                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1394                 if (retry_long == 0) {
1395                         result = -EINVAL;
1396                         goto bad_res;
1397                 }
1398                 changed |= WIPHY_PARAM_RETRY_LONG;
1399         }
1400
1401         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1402                 frag_threshold = nla_get_u32(
1403                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1404                 if (frag_threshold < 256) {
1405                         result = -EINVAL;
1406                         goto bad_res;
1407                 }
1408                 if (frag_threshold != (u32) -1) {
1409                         /*
1410                          * Fragments (apart from the last one) are required to
1411                          * have even length. Make the fragmentation code
1412                          * simpler by stripping LSB should someone try to use
1413                          * odd threshold value.
1414                          */
1415                         frag_threshold &= ~0x1;
1416                 }
1417                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1418         }
1419
1420         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1421                 rts_threshold = nla_get_u32(
1422                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1423                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1424         }
1425
1426         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1427                 coverage_class = nla_get_u8(
1428                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1429                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1430         }
1431
1432         if (changed) {
1433                 u8 old_retry_short, old_retry_long;
1434                 u32 old_frag_threshold, old_rts_threshold;
1435                 u8 old_coverage_class;
1436
1437                 if (!rdev->ops->set_wiphy_params) {
1438                         result = -EOPNOTSUPP;
1439                         goto bad_res;
1440                 }
1441
1442                 old_retry_short = rdev->wiphy.retry_short;
1443                 old_retry_long = rdev->wiphy.retry_long;
1444                 old_frag_threshold = rdev->wiphy.frag_threshold;
1445                 old_rts_threshold = rdev->wiphy.rts_threshold;
1446                 old_coverage_class = rdev->wiphy.coverage_class;
1447
1448                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1449                         rdev->wiphy.retry_short = retry_short;
1450                 if (changed & WIPHY_PARAM_RETRY_LONG)
1451                         rdev->wiphy.retry_long = retry_long;
1452                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1453                         rdev->wiphy.frag_threshold = frag_threshold;
1454                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1455                         rdev->wiphy.rts_threshold = rts_threshold;
1456                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1457                         rdev->wiphy.coverage_class = coverage_class;
1458
1459                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1460                 if (result) {
1461                         rdev->wiphy.retry_short = old_retry_short;
1462                         rdev->wiphy.retry_long = old_retry_long;
1463                         rdev->wiphy.frag_threshold = old_frag_threshold;
1464                         rdev->wiphy.rts_threshold = old_rts_threshold;
1465                         rdev->wiphy.coverage_class = old_coverage_class;
1466                 }
1467         }
1468
1469  bad_res:
1470         mutex_unlock(&rdev->mtx);
1471         if (netdev)
1472                 dev_put(netdev);
1473         return result;
1474 }
1475
1476
1477 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1478                               struct cfg80211_registered_device *rdev,
1479                               struct net_device *dev)
1480 {
1481         void *hdr;
1482
1483         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1484         if (!hdr)
1485                 return -1;
1486
1487         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1488         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1489         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1490         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1491
1492         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1493                     rdev->devlist_generation ^
1494                         (cfg80211_rdev_list_generation << 2));
1495
1496         return genlmsg_end(msg, hdr);
1497
1498  nla_put_failure:
1499         genlmsg_cancel(msg, hdr);
1500         return -EMSGSIZE;
1501 }
1502
1503 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1504 {
1505         int wp_idx = 0;
1506         int if_idx = 0;
1507         int wp_start = cb->args[0];
1508         int if_start = cb->args[1];
1509         struct cfg80211_registered_device *rdev;
1510         struct wireless_dev *wdev;
1511
1512         mutex_lock(&cfg80211_mutex);
1513         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1514                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1515                         continue;
1516                 if (wp_idx < wp_start) {
1517                         wp_idx++;
1518                         continue;
1519                 }
1520                 if_idx = 0;
1521
1522                 mutex_lock(&rdev->devlist_mtx);
1523                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1524                         if (if_idx < if_start) {
1525                                 if_idx++;
1526                                 continue;
1527                         }
1528                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1529                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1530                                                rdev, wdev->netdev) < 0) {
1531                                 mutex_unlock(&rdev->devlist_mtx);
1532                                 goto out;
1533                         }
1534                         if_idx++;
1535                 }
1536                 mutex_unlock(&rdev->devlist_mtx);
1537
1538                 wp_idx++;
1539         }
1540  out:
1541         mutex_unlock(&cfg80211_mutex);
1542
1543         cb->args[0] = wp_idx;
1544         cb->args[1] = if_idx;
1545
1546         return skb->len;
1547 }
1548
1549 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1550 {
1551         struct sk_buff *msg;
1552         struct cfg80211_registered_device *dev = info->user_ptr[0];
1553         struct net_device *netdev = info->user_ptr[1];
1554
1555         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1556         if (!msg)
1557                 return -ENOMEM;
1558
1559         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1560                                dev, netdev) < 0) {
1561                 nlmsg_free(msg);
1562                 return -ENOBUFS;
1563         }
1564
1565         return genlmsg_reply(msg, info);
1566 }
1567
1568 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1569         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1570         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1571         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1572         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1573         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1574 };
1575
1576 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1577 {
1578         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1579         int flag;
1580
1581         *mntrflags = 0;
1582
1583         if (!nla)
1584                 return -EINVAL;
1585
1586         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1587                              nla, mntr_flags_policy))
1588                 return -EINVAL;
1589
1590         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1591                 if (flags[flag])
1592                         *mntrflags |= (1<<flag);
1593
1594         return 0;
1595 }
1596
1597 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1598                                struct net_device *netdev, u8 use_4addr,
1599                                enum nl80211_iftype iftype)
1600 {
1601         if (!use_4addr) {
1602                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1603                         return -EBUSY;
1604                 return 0;
1605         }
1606
1607         switch (iftype) {
1608         case NL80211_IFTYPE_AP_VLAN:
1609                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1610                         return 0;
1611                 break;
1612         case NL80211_IFTYPE_STATION:
1613                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1614                         return 0;
1615                 break;
1616         default:
1617                 break;
1618         }
1619
1620         return -EOPNOTSUPP;
1621 }
1622
1623 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1624 {
1625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1626         struct vif_params params;
1627         int err;
1628         enum nl80211_iftype otype, ntype;
1629         struct net_device *dev = info->user_ptr[1];
1630         u32 _flags, *flags = NULL;
1631         bool change = false;
1632
1633         memset(&params, 0, sizeof(params));
1634
1635         otype = ntype = dev->ieee80211_ptr->iftype;
1636
1637         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1638                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1639                 if (otype != ntype)
1640                         change = true;
1641                 if (ntype > NL80211_IFTYPE_MAX)
1642                         return -EINVAL;
1643         }
1644
1645         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1646                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1647
1648                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1649                         return -EINVAL;
1650                 if (netif_running(dev))
1651                         return -EBUSY;
1652
1653                 wdev_lock(wdev);
1654                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1655                              IEEE80211_MAX_MESH_ID_LEN);
1656                 wdev->mesh_id_up_len =
1657                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1658                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1659                        wdev->mesh_id_up_len);
1660                 wdev_unlock(wdev);
1661         }
1662
1663         if (info->attrs[NL80211_ATTR_4ADDR]) {
1664                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1665                 change = true;
1666                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1667                 if (err)
1668                         return err;
1669         } else {
1670                 params.use_4addr = -1;
1671         }
1672
1673         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1674                 if (ntype != NL80211_IFTYPE_MONITOR)
1675                         return -EINVAL;
1676                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1677                                           &_flags);
1678                 if (err)
1679                         return err;
1680
1681                 flags = &_flags;
1682                 change = true;
1683         }
1684
1685         if (change)
1686                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1687         else
1688                 err = 0;
1689
1690         if (!err && params.use_4addr != -1)
1691                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1692
1693         return err;
1694 }
1695
1696 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1697 {
1698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1699         struct vif_params params;
1700         struct net_device *dev;
1701         int err;
1702         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1703         u32 flags;
1704
1705         memset(&params, 0, sizeof(params));
1706
1707         if (!info->attrs[NL80211_ATTR_IFNAME])
1708                 return -EINVAL;
1709
1710         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1711                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1712                 if (type > NL80211_IFTYPE_MAX)
1713                         return -EINVAL;
1714         }
1715
1716         if (!rdev->ops->add_virtual_intf ||
1717             !(rdev->wiphy.interface_modes & (1 << type)))
1718                 return -EOPNOTSUPP;
1719
1720         if (info->attrs[NL80211_ATTR_4ADDR]) {
1721                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1722                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1723                 if (err)
1724                         return err;
1725         }
1726
1727         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1728                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1729                                   &flags);
1730         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1731                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1732                 type, err ? NULL : &flags, &params);
1733         if (IS_ERR(dev))
1734                 return PTR_ERR(dev);
1735
1736         if (type == NL80211_IFTYPE_MESH_POINT &&
1737             info->attrs[NL80211_ATTR_MESH_ID]) {
1738                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1739
1740                 wdev_lock(wdev);
1741                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1742                              IEEE80211_MAX_MESH_ID_LEN);
1743                 wdev->mesh_id_up_len =
1744                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1745                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1746                        wdev->mesh_id_up_len);
1747                 wdev_unlock(wdev);
1748         }
1749
1750         return 0;
1751 }
1752
1753 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1754 {
1755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1756         struct net_device *dev = info->user_ptr[1];
1757
1758         if (!rdev->ops->del_virtual_intf)
1759                 return -EOPNOTSUPP;
1760
1761         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1762 }
1763
1764 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1765 {
1766         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1767         struct net_device *dev = info->user_ptr[1];
1768         u16 noack_map;
1769
1770         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1771                 return -EINVAL;
1772
1773         if (!rdev->ops->set_noack_map)
1774                 return -EOPNOTSUPP;
1775
1776         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1777
1778         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1779 }
1780
1781 struct get_key_cookie {
1782         struct sk_buff *msg;
1783         int error;
1784         int idx;
1785 };
1786
1787 static void get_key_callback(void *c, struct key_params *params)
1788 {
1789         struct nlattr *key;
1790         struct get_key_cookie *cookie = c;
1791
1792         if (params->key)
1793                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1794                         params->key_len, params->key);
1795
1796         if (params->seq)
1797                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1798                         params->seq_len, params->seq);
1799
1800         if (params->cipher)
1801                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1802                             params->cipher);
1803
1804         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1805         if (!key)
1806                 goto nla_put_failure;
1807
1808         if (params->key)
1809                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1810                         params->key_len, params->key);
1811
1812         if (params->seq)
1813                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1814                         params->seq_len, params->seq);
1815
1816         if (params->cipher)
1817                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1818                             params->cipher);
1819
1820         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1821
1822         nla_nest_end(cookie->msg, key);
1823
1824         return;
1825  nla_put_failure:
1826         cookie->error = 1;
1827 }
1828
1829 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1830 {
1831         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1832         int err;
1833         struct net_device *dev = info->user_ptr[1];
1834         u8 key_idx = 0;
1835         const u8 *mac_addr = NULL;
1836         bool pairwise;
1837         struct get_key_cookie cookie = {
1838                 .error = 0,
1839         };
1840         void *hdr;
1841         struct sk_buff *msg;
1842
1843         if (info->attrs[NL80211_ATTR_KEY_IDX])
1844                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1845
1846         if (key_idx > 5)
1847                 return -EINVAL;
1848
1849         if (info->attrs[NL80211_ATTR_MAC])
1850                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1851
1852         pairwise = !!mac_addr;
1853         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1854                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1855                 if (kt >= NUM_NL80211_KEYTYPES)
1856                         return -EINVAL;
1857                 if (kt != NL80211_KEYTYPE_GROUP &&
1858                     kt != NL80211_KEYTYPE_PAIRWISE)
1859                         return -EINVAL;
1860                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1861         }
1862
1863         if (!rdev->ops->get_key)
1864                 return -EOPNOTSUPP;
1865
1866         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1867         if (!msg)
1868                 return -ENOMEM;
1869
1870         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1871                              NL80211_CMD_NEW_KEY);
1872         if (IS_ERR(hdr))
1873                 return PTR_ERR(hdr);
1874
1875         cookie.msg = msg;
1876         cookie.idx = key_idx;
1877
1878         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1879         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1880         if (mac_addr)
1881                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1882
1883         if (pairwise && mac_addr &&
1884             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1885                 return -ENOENT;
1886
1887         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1888                                  mac_addr, &cookie, get_key_callback);
1889
1890         if (err)
1891                 goto free_msg;
1892
1893         if (cookie.error)
1894                 goto nla_put_failure;
1895
1896         genlmsg_end(msg, hdr);
1897         return genlmsg_reply(msg, info);
1898
1899  nla_put_failure:
1900         err = -ENOBUFS;
1901  free_msg:
1902         nlmsg_free(msg);
1903         return err;
1904 }
1905
1906 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1907 {
1908         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1909         struct key_parse key;
1910         int err;
1911         struct net_device *dev = info->user_ptr[1];
1912
1913         err = nl80211_parse_key(info, &key);
1914         if (err)
1915                 return err;
1916
1917         if (key.idx < 0)
1918                 return -EINVAL;
1919
1920         /* only support setting default key */
1921         if (!key.def && !key.defmgmt)
1922                 return -EINVAL;
1923
1924         wdev_lock(dev->ieee80211_ptr);
1925
1926         if (key.def) {
1927                 if (!rdev->ops->set_default_key) {
1928                         err = -EOPNOTSUPP;
1929                         goto out;
1930                 }
1931
1932                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1933                 if (err)
1934                         goto out;
1935
1936                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1937                                                  key.def_uni, key.def_multi);
1938
1939                 if (err)
1940                         goto out;
1941
1942 #ifdef CONFIG_CFG80211_WEXT
1943                 dev->ieee80211_ptr->wext.default_key = key.idx;
1944 #endif
1945         } else {
1946                 if (key.def_uni || !key.def_multi) {
1947                         err = -EINVAL;
1948                         goto out;
1949                 }
1950
1951                 if (!rdev->ops->set_default_mgmt_key) {
1952                         err = -EOPNOTSUPP;
1953                         goto out;
1954                 }
1955
1956                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1957                 if (err)
1958                         goto out;
1959
1960                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1961                                                       dev, key.idx);
1962                 if (err)
1963                         goto out;
1964
1965 #ifdef CONFIG_CFG80211_WEXT
1966                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1967 #endif
1968         }
1969
1970  out:
1971         wdev_unlock(dev->ieee80211_ptr);
1972
1973         return err;
1974 }
1975
1976 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1977 {
1978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1979         int err;
1980         struct net_device *dev = info->user_ptr[1];
1981         struct key_parse key;
1982         const u8 *mac_addr = NULL;
1983
1984         err = nl80211_parse_key(info, &key);
1985         if (err)
1986                 return err;
1987
1988         if (!key.p.key)
1989                 return -EINVAL;
1990
1991         if (info->attrs[NL80211_ATTR_MAC])
1992                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1993
1994         if (key.type == -1) {
1995                 if (mac_addr)
1996                         key.type = NL80211_KEYTYPE_PAIRWISE;
1997                 else
1998                         key.type = NL80211_KEYTYPE_GROUP;
1999         }
2000
2001         /* for now */
2002         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2003             key.type != NL80211_KEYTYPE_GROUP)
2004                 return -EINVAL;
2005
2006         if (!rdev->ops->add_key)
2007                 return -EOPNOTSUPP;
2008
2009         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2010                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2011                                            mac_addr))
2012                 return -EINVAL;
2013
2014         wdev_lock(dev->ieee80211_ptr);
2015         err = nl80211_key_allowed(dev->ieee80211_ptr);
2016         if (!err)
2017                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2018                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2019                                          mac_addr, &key.p);
2020         wdev_unlock(dev->ieee80211_ptr);
2021
2022         return err;
2023 }
2024
2025 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2026 {
2027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2028         int err;
2029         struct net_device *dev = info->user_ptr[1];
2030         u8 *mac_addr = NULL;
2031         struct key_parse key;
2032
2033         err = nl80211_parse_key(info, &key);
2034         if (err)
2035                 return err;
2036
2037         if (info->attrs[NL80211_ATTR_MAC])
2038                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2039
2040         if (key.type == -1) {
2041                 if (mac_addr)
2042                         key.type = NL80211_KEYTYPE_PAIRWISE;
2043                 else
2044                         key.type = NL80211_KEYTYPE_GROUP;
2045         }
2046
2047         /* for now */
2048         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2049             key.type != NL80211_KEYTYPE_GROUP)
2050                 return -EINVAL;
2051
2052         if (!rdev->ops->del_key)
2053                 return -EOPNOTSUPP;
2054
2055         wdev_lock(dev->ieee80211_ptr);
2056         err = nl80211_key_allowed(dev->ieee80211_ptr);
2057
2058         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2059             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2060                 err = -ENOENT;
2061
2062         if (!err)
2063                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2064                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2065                                          mac_addr);
2066
2067 #ifdef CONFIG_CFG80211_WEXT
2068         if (!err) {
2069                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2070                         dev->ieee80211_ptr->wext.default_key = -1;
2071                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2072                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2073         }
2074 #endif
2075         wdev_unlock(dev->ieee80211_ptr);
2076
2077         return err;
2078 }
2079
2080 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
2081 {
2082         int (*call)(struct wiphy *wiphy, struct net_device *dev,
2083                     struct beacon_parameters *info);
2084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2085         struct net_device *dev = info->user_ptr[1];
2086         struct wireless_dev *wdev = dev->ieee80211_ptr;
2087         struct beacon_parameters params;
2088         int haveinfo = 0, err;
2089
2090         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2091             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2092             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2093             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2094                 return -EINVAL;
2095
2096         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2097             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2098                 return -EOPNOTSUPP;
2099
2100         memset(&params, 0, sizeof(params));
2101
2102         switch (info->genlhdr->cmd) {
2103         case NL80211_CMD_NEW_BEACON:
2104                 /* these are required for NEW_BEACON */
2105                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2106                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2107                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
2108                         return -EINVAL;
2109
2110                 params.interval =
2111                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2112                 params.dtim_period =
2113                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2114
2115                 err = cfg80211_validate_beacon_int(rdev, params.interval);
2116                 if (err)
2117                         return err;
2118
2119                 /*
2120                  * In theory, some of these attributes could be required for
2121                  * NEW_BEACON, but since they were not used when the command was
2122                  * originally added, keep them optional for old user space
2123                  * programs to work with drivers that do not need the additional
2124                  * information.
2125                  */
2126                 if (info->attrs[NL80211_ATTR_SSID]) {
2127                         params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2128                         params.ssid_len =
2129                                 nla_len(info->attrs[NL80211_ATTR_SSID]);
2130                         if (params.ssid_len == 0 ||
2131                             params.ssid_len > IEEE80211_MAX_SSID_LEN)
2132                                 return -EINVAL;
2133                 }
2134
2135                 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2136                         params.hidden_ssid = nla_get_u32(
2137                                 info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2138                         if (params.hidden_ssid !=
2139                             NL80211_HIDDEN_SSID_NOT_IN_USE &&
2140                             params.hidden_ssid !=
2141                             NL80211_HIDDEN_SSID_ZERO_LEN &&
2142                             params.hidden_ssid !=
2143                             NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2144                                 return -EINVAL;
2145                 }
2146
2147                 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2148
2149                 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2150                         params.auth_type = nla_get_u32(
2151                                 info->attrs[NL80211_ATTR_AUTH_TYPE]);
2152                         if (!nl80211_valid_auth_type(params.auth_type))
2153                                 return -EINVAL;
2154                 } else
2155                         params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2156
2157                 err = nl80211_crypto_settings(rdev, info, &params.crypto,
2158                                               NL80211_MAX_NR_CIPHER_SUITES);
2159                 if (err)
2160                         return err;
2161
2162                 call = rdev->ops->add_beacon;
2163                 break;
2164         case NL80211_CMD_SET_BEACON:
2165                 call = rdev->ops->set_beacon;
2166                 break;
2167         default:
2168                 WARN_ON(1);
2169                 return -EOPNOTSUPP;
2170         }
2171
2172         if (!call)
2173                 return -EOPNOTSUPP;
2174
2175         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2176                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2177                 params.head_len =
2178                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2179                 haveinfo = 1;
2180         }
2181
2182         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2183                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2184                 params.tail_len =
2185                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2186                 haveinfo = 1;
2187         }
2188
2189         if (!haveinfo)
2190                 return -EINVAL;
2191
2192         if (info->attrs[NL80211_ATTR_IE]) {
2193                 params.beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2194                 params.beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2195         }
2196
2197         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2198                 params.proberesp_ies =
2199                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2200                 params.proberesp_ies_len =
2201                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2202         }
2203
2204         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2205                 params.assocresp_ies =
2206                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2207                 params.assocresp_ies_len =
2208                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2209         }
2210
2211         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2212                 params.probe_resp =
2213                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2214                 params.probe_resp_len =
2215                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2216         }
2217
2218         err = call(&rdev->wiphy, dev, &params);
2219         if (!err && params.interval)
2220                 wdev->beacon_interval = params.interval;
2221         return err;
2222 }
2223
2224 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
2225 {
2226         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2227         struct net_device *dev = info->user_ptr[1];
2228         struct wireless_dev *wdev = dev->ieee80211_ptr;
2229         int err;
2230
2231         if (!rdev->ops->del_beacon)
2232                 return -EOPNOTSUPP;
2233
2234         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2235             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2236                 return -EOPNOTSUPP;
2237
2238         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
2239         if (!err)
2240                 wdev->beacon_interval = 0;
2241         return err;
2242 }
2243
2244 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2245         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2246         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2247         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2248         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2249         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2250 };
2251
2252 static int parse_station_flags(struct genl_info *info,
2253                                struct station_parameters *params)
2254 {
2255         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2256         struct nlattr *nla;
2257         int flag;
2258
2259         /*
2260          * Try parsing the new attribute first so userspace
2261          * can specify both for older kernels.
2262          */
2263         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2264         if (nla) {
2265                 struct nl80211_sta_flag_update *sta_flags;
2266
2267                 sta_flags = nla_data(nla);
2268                 params->sta_flags_mask = sta_flags->mask;
2269                 params->sta_flags_set = sta_flags->set;
2270                 if ((params->sta_flags_mask |
2271                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2272                         return -EINVAL;
2273                 return 0;
2274         }
2275
2276         /* if present, parse the old attribute */
2277
2278         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2279         if (!nla)
2280                 return 0;
2281
2282         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2283                              nla, sta_flags_policy))
2284                 return -EINVAL;
2285
2286         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
2287         params->sta_flags_mask &= ~1;
2288
2289         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2290                 if (flags[flag])
2291                         params->sta_flags_set |= (1<<flag);
2292
2293         return 0;
2294 }
2295
2296 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2297                                  int attr)
2298 {
2299         struct nlattr *rate;
2300         u16 bitrate;
2301
2302         rate = nla_nest_start(msg, attr);
2303         if (!rate)
2304                 goto nla_put_failure;
2305
2306         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2307         bitrate = cfg80211_calculate_bitrate(info);
2308         if (bitrate > 0)
2309                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2310
2311         if (info->flags & RATE_INFO_FLAGS_MCS)
2312                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2313         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2314                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2315         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2316                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2317
2318         nla_nest_end(msg, rate);
2319         return true;
2320
2321 nla_put_failure:
2322         return false;
2323 }
2324
2325 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2326                                 int flags, struct net_device *dev,
2327                                 const u8 *mac_addr, struct station_info *sinfo)
2328 {
2329         void *hdr;
2330         struct nlattr *sinfoattr, *bss_param;
2331
2332         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2333         if (!hdr)
2334                 return -1;
2335
2336         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2337         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2338
2339         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2340
2341         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2342         if (!sinfoattr)
2343                 goto nla_put_failure;
2344         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2345                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2346                             sinfo->connected_time);
2347         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2348                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2349                             sinfo->inactive_time);
2350         if (sinfo->filled & STATION_INFO_RX_BYTES)
2351                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2352                             sinfo->rx_bytes);
2353         if (sinfo->filled & STATION_INFO_TX_BYTES)
2354                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2355                             sinfo->tx_bytes);
2356         if (sinfo->filled & STATION_INFO_LLID)
2357                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2358                             sinfo->llid);
2359         if (sinfo->filled & STATION_INFO_PLID)
2360                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2361                             sinfo->plid);
2362         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2363                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2364                             sinfo->plink_state);
2365         if (sinfo->filled & STATION_INFO_SIGNAL)
2366                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2367                            sinfo->signal);
2368         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2369                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2370                            sinfo->signal_avg);
2371         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2372                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2373                                           NL80211_STA_INFO_TX_BITRATE))
2374                         goto nla_put_failure;
2375         }
2376         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2377                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2378                                           NL80211_STA_INFO_RX_BITRATE))
2379                         goto nla_put_failure;
2380         }
2381         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2382                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2383                             sinfo->rx_packets);
2384         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2385                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2386                             sinfo->tx_packets);
2387         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2388                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2389                             sinfo->tx_retries);
2390         if (sinfo->filled & STATION_INFO_TX_FAILED)
2391                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2392                             sinfo->tx_failed);
2393         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2394                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2395                 if (!bss_param)
2396                         goto nla_put_failure;
2397
2398                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2399                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2400                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2401                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2402                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2403                         NLA_PUT_FLAG(msg,
2404                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2405                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2406                            sinfo->bss_param.dtim_period);
2407                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2408                             sinfo->bss_param.beacon_interval);
2409
2410                 nla_nest_end(msg, bss_param);
2411         }
2412         if (sinfo->filled & STATION_INFO_STA_FLAGS)
2413                 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2414                         sizeof(struct nl80211_sta_flag_update),
2415                         &sinfo->sta_flags);
2416         nla_nest_end(msg, sinfoattr);
2417
2418         if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2419                 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2420                         sinfo->assoc_req_ies);
2421
2422         return genlmsg_end(msg, hdr);
2423
2424  nla_put_failure:
2425         genlmsg_cancel(msg, hdr);
2426         return -EMSGSIZE;
2427 }
2428
2429 static int nl80211_dump_station(struct sk_buff *skb,
2430                                 struct netlink_callback *cb)
2431 {
2432         struct station_info sinfo;
2433         struct cfg80211_registered_device *dev;
2434         struct net_device *netdev;
2435         u8 mac_addr[ETH_ALEN];
2436         int sta_idx = cb->args[1];
2437         int err;
2438
2439         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2440         if (err)
2441                 return err;
2442
2443         if (!dev->ops->dump_station) {
2444                 err = -EOPNOTSUPP;
2445                 goto out_err;
2446         }
2447
2448         while (1) {
2449                 memset(&sinfo, 0, sizeof(sinfo));
2450                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2451                                              mac_addr, &sinfo);
2452                 if (err == -ENOENT)
2453                         break;
2454                 if (err)
2455                         goto out_err;
2456
2457                 if (nl80211_send_station(skb,
2458                                 NETLINK_CB(cb->skb).pid,
2459                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2460                                 netdev, mac_addr,
2461                                 &sinfo) < 0)
2462                         goto out;
2463
2464                 sta_idx++;
2465         }
2466
2467
2468  out:
2469         cb->args[1] = sta_idx;
2470         err = skb->len;
2471  out_err:
2472         nl80211_finish_netdev_dump(dev);
2473
2474         return err;
2475 }
2476
2477 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2478 {
2479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2480         struct net_device *dev = info->user_ptr[1];
2481         struct station_info sinfo;
2482         struct sk_buff *msg;
2483         u8 *mac_addr = NULL;
2484         int err;
2485
2486         memset(&sinfo, 0, sizeof(sinfo));
2487
2488         if (!info->attrs[NL80211_ATTR_MAC])
2489                 return -EINVAL;
2490
2491         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2492
2493         if (!rdev->ops->get_station)
2494                 return -EOPNOTSUPP;
2495
2496         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2497         if (err)
2498                 return err;
2499
2500         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2501         if (!msg)
2502                 return -ENOMEM;
2503
2504         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2505                                  dev, mac_addr, &sinfo) < 0) {
2506                 nlmsg_free(msg);
2507                 return -ENOBUFS;
2508         }
2509
2510         return genlmsg_reply(msg, info);
2511 }
2512
2513 /*
2514  * Get vlan interface making sure it is running and on the right wiphy.
2515  */
2516 static struct net_device *get_vlan(struct genl_info *info,
2517                                    struct cfg80211_registered_device *rdev)
2518 {
2519         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2520         struct net_device *v;
2521         int ret;
2522
2523         if (!vlanattr)
2524                 return NULL;
2525
2526         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2527         if (!v)
2528                 return ERR_PTR(-ENODEV);
2529
2530         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2531                 ret = -EINVAL;
2532                 goto error;
2533         }
2534
2535         if (!netif_running(v)) {
2536                 ret = -ENETDOWN;
2537                 goto error;
2538         }
2539
2540         return v;
2541  error:
2542         dev_put(v);
2543         return ERR_PTR(ret);
2544 }
2545
2546 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2547 {
2548         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2549         int err;
2550         struct net_device *dev = info->user_ptr[1];
2551         struct station_parameters params;
2552         u8 *mac_addr = NULL;
2553
2554         memset(&params, 0, sizeof(params));
2555
2556         params.listen_interval = -1;
2557         params.plink_state = -1;
2558
2559         if (info->attrs[NL80211_ATTR_STA_AID])
2560                 return -EINVAL;
2561
2562         if (!info->attrs[NL80211_ATTR_MAC])
2563                 return -EINVAL;
2564
2565         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2566
2567         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2568                 params.supported_rates =
2569                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2570                 params.supported_rates_len =
2571                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2572         }
2573
2574         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2575                 params.listen_interval =
2576                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2577
2578         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2579                 params.ht_capa =
2580                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2581
2582         if (parse_station_flags(info, &params))
2583                 return -EINVAL;
2584
2585         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2586                 params.plink_action =
2587                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2588
2589         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2590                 params.plink_state =
2591                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2592
2593         params.vlan = get_vlan(info, rdev);
2594         if (IS_ERR(params.vlan))
2595                 return PTR_ERR(params.vlan);
2596
2597         /* validate settings */
2598         err = 0;
2599
2600         switch (dev->ieee80211_ptr->iftype) {
2601         case NL80211_IFTYPE_AP:
2602         case NL80211_IFTYPE_AP_VLAN:
2603         case NL80211_IFTYPE_P2P_GO:
2604                 /* disallow mesh-specific things */
2605                 if (params.plink_action)
2606                         err = -EINVAL;
2607                 break;
2608         case NL80211_IFTYPE_P2P_CLIENT:
2609         case NL80211_IFTYPE_STATION:
2610                 /* disallow things sta doesn't support */
2611                 if (params.plink_action)
2612                         err = -EINVAL;
2613                 if (params.vlan)
2614                         err = -EINVAL;
2615                 if (params.supported_rates &&
2616                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2617                         err = -EINVAL;
2618                 if (params.ht_capa)
2619                         err = -EINVAL;
2620                 if (params.listen_interval >= 0)
2621                         err = -EINVAL;
2622                 if (params.sta_flags_mask &
2623                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2624                                   BIT(NL80211_STA_FLAG_TDLS_PEER)))
2625                         err = -EINVAL;
2626                 /* can't change the TDLS bit */
2627                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
2628                     (params.sta_flags_mask & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2629                         err = -EINVAL;
2630                 break;
2631         case NL80211_IFTYPE_MESH_POINT:
2632                 /* disallow things mesh doesn't support */
2633                 if (params.vlan)
2634                         err = -EINVAL;
2635                 if (params.ht_capa)
2636                         err = -EINVAL;
2637                 if (params.listen_interval >= 0)
2638                         err = -EINVAL;
2639                 if (params.sta_flags_mask &
2640                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2641                                   BIT(NL80211_STA_FLAG_MFP) |
2642                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2643                         err = -EINVAL;
2644                 break;
2645         default:
2646                 err = -EINVAL;
2647         }
2648
2649         if (err)
2650                 goto out;
2651
2652         if (!rdev->ops->change_station) {
2653                 err = -EOPNOTSUPP;
2654                 goto out;
2655         }
2656
2657         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2658
2659  out:
2660         if (params.vlan)
2661                 dev_put(params.vlan);
2662
2663         return err;
2664 }
2665
2666 static struct nla_policy
2667 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2668         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2669         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2670 };
2671
2672 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2673 {
2674         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2675         int err;
2676         struct net_device *dev = info->user_ptr[1];
2677         struct station_parameters params;
2678         u8 *mac_addr = NULL;
2679
2680         memset(&params, 0, sizeof(params));
2681
2682         if (!info->attrs[NL80211_ATTR_MAC])
2683                 return -EINVAL;
2684
2685         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2686                 return -EINVAL;
2687
2688         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2689                 return -EINVAL;
2690
2691         if (!info->attrs[NL80211_ATTR_STA_AID])
2692                 return -EINVAL;
2693
2694         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2695         params.supported_rates =
2696                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2697         params.supported_rates_len =
2698                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2699         params.listen_interval =
2700                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2701
2702         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2703         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2704                 return -EINVAL;
2705
2706         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2707                 params.ht_capa =
2708                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2709
2710         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2711                 params.plink_action =
2712                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2713
2714         if (parse_station_flags(info, &params))
2715                 return -EINVAL;
2716
2717         /* parse WME attributes if sta is WME capable */
2718         if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2719             (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2720             info->attrs[NL80211_ATTR_STA_WME]) {
2721                 struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2722                 struct nlattr *nla;
2723
2724                 nla = info->attrs[NL80211_ATTR_STA_WME];
2725                 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2726                                        nl80211_sta_wme_policy);
2727                 if (err)
2728                         return err;
2729
2730                 if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2731                         params.uapsd_queues =
2732                              nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2733                 if (params.uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2734                         return -EINVAL;
2735
2736                 if (tb[NL80211_STA_WME_MAX_SP])
2737                         params.max_sp =
2738                              nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2739
2740                 if (params.max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2741                         return -EINVAL;
2742
2743                 params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2744         }
2745
2746         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2747             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2748             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2749             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO &&
2750             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION)
2751                 return -EINVAL;
2752
2753         /*
2754          * Only managed stations can add TDLS peers, and only when the
2755          * wiphy supports external TDLS setup.
2756          */
2757         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_STATION &&
2758             !((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
2759               (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
2760               (rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)))
2761                 return -EINVAL;
2762
2763         params.vlan = get_vlan(info, rdev);
2764         if (IS_ERR(params.vlan))
2765                 return PTR_ERR(params.vlan);
2766
2767         /* validate settings */
2768         err = 0;
2769
2770         if (!rdev->ops->add_station) {
2771                 err = -EOPNOTSUPP;
2772                 goto out;
2773         }
2774
2775         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2776
2777  out:
2778         if (params.vlan)
2779                 dev_put(params.vlan);
2780         return err;
2781 }
2782
2783 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2784 {
2785         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2786         struct net_device *dev = info->user_ptr[1];
2787         u8 *mac_addr = NULL;
2788
2789         if (info->attrs[NL80211_ATTR_MAC])
2790                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2791
2792         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2793             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2794             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2795             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2796                 return -EINVAL;
2797
2798         if (!rdev->ops->del_station)
2799                 return -EOPNOTSUPP;
2800
2801         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2802 }
2803
2804 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2805                                 int flags, struct net_device *dev,
2806                                 u8 *dst, u8 *next_hop,
2807                                 struct mpath_info *pinfo)
2808 {
2809         void *hdr;
2810         struct nlattr *pinfoattr;
2811
2812         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2813         if (!hdr)
2814                 return -1;
2815
2816         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2817         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2818         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2819
2820         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2821
2822         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2823         if (!pinfoattr)
2824                 goto nla_put_failure;
2825         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2826                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2827                             pinfo->frame_qlen);
2828         if (pinfo->filled & MPATH_INFO_SN)
2829                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2830                             pinfo->sn);
2831         if (pinfo->filled & MPATH_INFO_METRIC)
2832                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2833                             pinfo->metric);
2834         if (pinfo->filled & MPATH_INFO_EXPTIME)
2835                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2836                             pinfo->exptime);
2837         if (pinfo->filled & MPATH_INFO_FLAGS)
2838                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2839                             pinfo->flags);
2840         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2841                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2842                             pinfo->discovery_timeout);
2843         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2844                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2845                             pinfo->discovery_retries);
2846
2847         nla_nest_end(msg, pinfoattr);
2848
2849         return genlmsg_end(msg, hdr);
2850
2851  nla_put_failure:
2852         genlmsg_cancel(msg, hdr);
2853         return -EMSGSIZE;
2854 }
2855
2856 static int nl80211_dump_mpath(struct sk_buff *skb,
2857                               struct netlink_callback *cb)
2858 {
2859         struct mpath_info pinfo;
2860         struct cfg80211_registered_device *dev;
2861         struct net_device *netdev;
2862         u8 dst[ETH_ALEN];
2863         u8 next_hop[ETH_ALEN];
2864         int path_idx = cb->args[1];
2865         int err;
2866
2867         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2868         if (err)
2869                 return err;
2870
2871         if (!dev->ops->dump_mpath) {
2872                 err = -EOPNOTSUPP;
2873                 goto out_err;
2874         }
2875
2876         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2877                 err = -EOPNOTSUPP;
2878                 goto out_err;
2879         }
2880
2881         while (1) {
2882                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2883                                            dst, next_hop, &pinfo);
2884                 if (err == -ENOENT)
2885                         break;
2886                 if (err)
2887                         goto out_err;
2888
2889                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2890                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2891                                        netdev, dst, next_hop,
2892                                        &pinfo) < 0)
2893                         goto out;
2894
2895                 path_idx++;
2896         }
2897
2898
2899  out:
2900         cb->args[1] = path_idx;
2901         err = skb->len;
2902  out_err:
2903         nl80211_finish_netdev_dump(dev);
2904         return err;
2905 }
2906
2907 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2908 {
2909         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2910         int err;
2911         struct net_device *dev = info->user_ptr[1];
2912         struct mpath_info pinfo;
2913         struct sk_buff *msg;
2914         u8 *dst = NULL;
2915         u8 next_hop[ETH_ALEN];
2916
2917         memset(&pinfo, 0, sizeof(pinfo));
2918
2919         if (!info->attrs[NL80211_ATTR_MAC])
2920                 return -EINVAL;
2921
2922         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2923
2924         if (!rdev->ops->get_mpath)
2925                 return -EOPNOTSUPP;
2926
2927         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2928                 return -EOPNOTSUPP;
2929
2930         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2931         if (err)
2932                 return err;
2933
2934         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2935         if (!msg)
2936                 return -ENOMEM;
2937
2938         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2939                                  dev, dst, next_hop, &pinfo) < 0) {
2940                 nlmsg_free(msg);
2941                 return -ENOBUFS;
2942         }
2943
2944         return genlmsg_reply(msg, info);
2945 }
2946
2947 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2948 {
2949         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2950         struct net_device *dev = info->user_ptr[1];
2951         u8 *dst = NULL;
2952         u8 *next_hop = NULL;
2953
2954         if (!info->attrs[NL80211_ATTR_MAC])
2955                 return -EINVAL;
2956
2957         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2958                 return -EINVAL;
2959
2960         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2961         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2962
2963         if (!rdev->ops->change_mpath)
2964                 return -EOPNOTSUPP;
2965
2966         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2967                 return -EOPNOTSUPP;
2968
2969         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2970 }
2971
2972 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2973 {
2974         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2975         struct net_device *dev = info->user_ptr[1];
2976         u8 *dst = NULL;
2977         u8 *next_hop = NULL;
2978
2979         if (!info->attrs[NL80211_ATTR_MAC])
2980                 return -EINVAL;
2981
2982         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2983                 return -EINVAL;
2984
2985         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2986         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2987
2988         if (!rdev->ops->add_mpath)
2989                 return -EOPNOTSUPP;
2990
2991         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2992                 return -EOPNOTSUPP;
2993
2994         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2995 }
2996
2997 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2998 {
2999         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3000         struct net_device *dev = info->user_ptr[1];
3001         u8 *dst = NULL;
3002
3003         if (info->attrs[NL80211_ATTR_MAC])
3004                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3005
3006         if (!rdev->ops->del_mpath)
3007                 return -EOPNOTSUPP;
3008
3009         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3010 }
3011
3012 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3013 {
3014         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3015         struct net_device *dev = info->user_ptr[1];
3016         struct bss_parameters params;
3017
3018         memset(&params, 0, sizeof(params));
3019         /* default to not changing parameters */
3020         params.use_cts_prot = -1;
3021         params.use_short_preamble = -1;
3022         params.use_short_slot_time = -1;
3023         params.ap_isolate = -1;
3024         params.ht_opmode = -1;
3025
3026         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3027                 params.use_cts_prot =
3028                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3029         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3030                 params.use_short_preamble =
3031                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3032         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3033                 params.use_short_slot_time =
3034                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3035         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3036                 params.basic_rates =
3037                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3038                 params.basic_rates_len =
3039                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3040         }
3041         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3042                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3043         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3044                 params.ht_opmode =
3045                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3046
3047         if (!rdev->ops->change_bss)
3048                 return -EOPNOTSUPP;
3049
3050         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3051             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3052                 return -EOPNOTSUPP;
3053
3054         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3055 }
3056
3057 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3058         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3059         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3060         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3061         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3062         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3063         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3064 };
3065
3066 static int parse_reg_rule(struct nlattr *tb[],
3067         struct ieee80211_reg_rule *reg_rule)
3068 {
3069         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3070         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3071
3072         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3073                 return -EINVAL;
3074         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3075                 return -EINVAL;
3076         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3077                 return -EINVAL;
3078         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3079                 return -EINVAL;
3080         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3081                 return -EINVAL;
3082
3083         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3084
3085         freq_range->start_freq_khz =
3086                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3087         freq_range->end_freq_khz =
3088                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3089         freq_range->max_bandwidth_khz =
3090                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3091
3092         power_rule->max_eirp =
3093                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3094
3095         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3096                 power_rule->max_antenna_gain =
3097                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3098
3099         return 0;
3100 }
3101
3102 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3103 {
3104         int r;
3105         char *data = NULL;
3106
3107         /*
3108          * You should only get this when cfg80211 hasn't yet initialized
3109          * completely when built-in to the kernel right between the time
3110          * window between nl80211_init() and regulatory_init(), if that is
3111          * even possible.
3112          */
3113         mutex_lock(&cfg80211_mutex);
3114         if (unlikely(!cfg80211_regdomain)) {
3115                 mutex_unlock(&cfg80211_mutex);
3116                 return -EINPROGRESS;
3117         }
3118         mutex_unlock(&cfg80211_mutex);
3119
3120         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3121                 return -EINVAL;
3122
3123         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3124
3125         r = regulatory_hint_user(data);
3126
3127         return r;
3128 }
3129
3130 static int nl80211_get_mesh_config(struct sk_buff *skb,
3131                                    struct genl_info *info)
3132 {
3133         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3134         struct net_device *dev = info->user_ptr[1];
3135         struct wireless_dev *wdev = dev->ieee80211_ptr;
3136         struct mesh_config cur_params;
3137         int err = 0;
3138         void *hdr;
3139         struct nlattr *pinfoattr;
3140         struct sk_buff *msg;
3141
3142         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3143                 return -EOPNOTSUPP;
3144
3145         if (!rdev->ops->get_mesh_config)
3146                 return -EOPNOTSUPP;
3147
3148         wdev_lock(wdev);
3149         /* If not connected, get default parameters */
3150         if (!wdev->mesh_id_len)
3151                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3152         else
3153                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3154                                                  &cur_params);
3155         wdev_unlock(wdev);
3156
3157         if (err)
3158                 return err;
3159
3160         /* Draw up a netlink message to send back */
3161         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3162         if (!msg)
3163                 return -ENOMEM;
3164         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3165                              NL80211_CMD_GET_MESH_CONFIG);
3166         if (!hdr)
3167                 goto out;
3168         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3169         if (!pinfoattr)
3170                 goto nla_put_failure;
3171         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3172         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3173                         cur_params.dot11MeshRetryTimeout);
3174         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3175                         cur_params.dot11MeshConfirmTimeout);
3176         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3177                         cur_params.dot11MeshHoldingTimeout);
3178         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3179                         cur_params.dot11MeshMaxPeerLinks);
3180         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3181                         cur_params.dot11MeshMaxRetries);
3182         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3183                         cur_params.dot11MeshTTL);
3184         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3185                         cur_params.element_ttl);
3186         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3187                         cur_params.auto_open_plinks);
3188         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3189                         cur_params.dot11MeshHWMPmaxPREQretries);
3190         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3191                         cur_params.path_refresh_time);
3192         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3193                         cur_params.min_discovery_timeout);
3194         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3195                         cur_params.dot11MeshHWMPactivePathTimeout);
3196         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3197                         cur_params.dot11MeshHWMPpreqMinInterval);
3198         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3199                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3200         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3201                         cur_params.dot11MeshHWMPRootMode);
3202         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3203                         cur_params.dot11MeshHWMPRannInterval);
3204         NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3205                         cur_params.dot11MeshGateAnnouncementProtocol);
3206         nla_nest_end(msg, pinfoattr);
3207         genlmsg_end(msg, hdr);
3208         return genlmsg_reply(msg, info);
3209
3210  nla_put_failure:
3211         genlmsg_cancel(msg, hdr);
3212  out:
3213         nlmsg_free(msg);
3214         return -ENOBUFS;
3215 }
3216
3217 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3218         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3219         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3220         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3221         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3222         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3223         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3224         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3225         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3226
3227         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3228         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3229         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3230         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3231         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3232         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3233         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3234         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3235         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3236 };
3237
3238 static const struct nla_policy
3239         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3240         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3241         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3242         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3243         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3244                 .len = IEEE80211_MAX_DATA_LEN },
3245         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3246 };
3247
3248 static int nl80211_parse_mesh_config(struct genl_info *info,
3249                                      struct mesh_config *cfg,
3250                                      u32 *mask_out)
3251 {
3252         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3253         u32 mask = 0;
3254
3255 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3256 do {\
3257         if (table[attr_num]) {\
3258                 cfg->param = nla_fn(table[attr_num]); \
3259                 mask |= (1 << (attr_num - 1)); \
3260         } \
3261 } while (0);\
3262
3263
3264         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3265                 return -EINVAL;
3266         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3267                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3268                              nl80211_meshconf_params_policy))
3269                 return -EINVAL;
3270
3271         /* This makes sure that there aren't more than 32 mesh config
3272          * parameters (otherwise our bitfield scheme would not work.) */
3273         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3274
3275         /* Fill in the params struct */
3276         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3277                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3278         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3279                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3280         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3281                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3282         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3283                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3284         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3285                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3286         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3287                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3288         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3289                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3290         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3291                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3292         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3293                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3294                         nla_get_u8);
3295         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3296                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3297         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3298                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3299                         nla_get_u16);
3300         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3301                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3302                         nla_get_u32);
3303         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3304                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3305                         nla_get_u16);
3306         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3307                         dot11MeshHWMPnetDiameterTraversalTime,
3308                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3309                         nla_get_u16);
3310         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3311                         dot11MeshHWMPRootMode, mask,
3312                         NL80211_MESHCONF_HWMP_ROOTMODE,
3313                         nla_get_u8);
3314         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3315                         dot11MeshHWMPRannInterval, mask,
3316                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3317                         nla_get_u16);
3318         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3319                         dot11MeshGateAnnouncementProtocol, mask,
3320                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3321                         nla_get_u8);
3322         if (mask_out)
3323                 *mask_out = mask;
3324
3325         return 0;
3326
3327 #undef FILL_IN_MESH_PARAM_IF_SET
3328 }
3329
3330 static int nl80211_parse_mesh_setup(struct genl_info *info,
3331                                      struct mesh_setup *setup)
3332 {
3333         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3334
3335         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3336                 return -EINVAL;
3337         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3338                              info->attrs[NL80211_ATTR_MESH_SETUP],
3339                              nl80211_mesh_setup_params_policy))
3340                 return -EINVAL;
3341
3342         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3343                 setup->path_sel_proto =
3344                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3345                  IEEE80211_PATH_PROTOCOL_VENDOR :
3346                  IEEE80211_PATH_PROTOCOL_HWMP;
3347
3348         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3349                 setup->path_metric =
3350                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3351                  IEEE80211_PATH_METRIC_VENDOR :
3352                  IEEE80211_PATH_METRIC_AIRTIME;
3353
3354
3355         if (tb[NL80211_MESH_SETUP_IE]) {
3356                 struct nlattr *ieattr =
3357                         tb[NL80211_MESH_SETUP_IE];
3358                 if (!is_valid_ie_attr(ieattr))
3359                         return -EINVAL;
3360                 setup->ie = nla_data(ieattr);
3361                 setup->ie_len = nla_len(ieattr);
3362         }
3363         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3364         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3365
3366         return 0;
3367 }
3368
3369 static int nl80211_update_mesh_config(struct sk_buff *skb,
3370                                       struct genl_info *info)
3371 {
3372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3373         struct net_device *dev = info->user_ptr[1];
3374         struct wireless_dev *wdev = dev->ieee80211_ptr;
3375         struct mesh_config cfg;
3376         u32 mask;
3377         int err;
3378
3379         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3380                 return -EOPNOTSUPP;
3381
3382         if (!rdev->ops->update_mesh_config)
3383                 return -EOPNOTSUPP;
3384
3385         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3386         if (err)
3387                 return err;
3388
3389         wdev_lock(wdev);
3390         if (!wdev->mesh_id_len)
3391                 err = -ENOLINK;
3392
3393         if (!err)
3394                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3395                                                     mask, &cfg);
3396
3397         wdev_unlock(wdev);
3398
3399         return err;
3400 }
3401
3402 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3403 {
3404         struct sk_buff *msg;
3405         void *hdr = NULL;
3406         struct nlattr *nl_reg_rules;
3407         unsigned int i;
3408         int err = -EINVAL;
3409
3410         mutex_lock(&cfg80211_mutex);
3411
3412         if (!cfg80211_regdomain)
3413                 goto out;
3414
3415         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3416         if (!msg) {
3417                 err = -ENOBUFS;
3418                 goto out;
3419         }
3420
3421         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3422                              NL80211_CMD_GET_REG);
3423         if (!hdr)
3424                 goto put_failure;
3425
3426         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3427                 cfg80211_regdomain->alpha2);
3428         if (cfg80211_regdomain->dfs_region)
3429                 NLA_PUT_U8(msg, NL80211_ATTR_DFS_REGION,
3430                            cfg80211_regdomain->dfs_region);
3431
3432         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3433         if (!nl_reg_rules)
3434                 goto nla_put_failure;
3435
3436         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3437                 struct nlattr *nl_reg_rule;
3438                 const struct ieee80211_reg_rule *reg_rule;
3439                 const struct ieee80211_freq_range *freq_range;
3440                 const struct ieee80211_power_rule *power_rule;
3441
3442                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3443                 freq_range = &reg_rule->freq_range;
3444                 power_rule = &reg_rule->power_rule;
3445
3446                 nl_reg_rule = nla_nest_start(msg, i);
3447                 if (!nl_reg_rule)
3448                         goto nla_put_failure;
3449
3450                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3451                         reg_rule->flags);
3452                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3453                         freq_range->start_freq_khz);
3454                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3455                         freq_range->end_freq_khz);
3456                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3457                         freq_range->max_bandwidth_khz);
3458                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3459                         power_rule->max_antenna_gain);
3460                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3461                         power_rule->max_eirp);
3462
3463                 nla_nest_end(msg, nl_reg_rule);
3464         }
3465
3466         nla_nest_end(msg, nl_reg_rules);
3467
3468         genlmsg_end(msg, hdr);
3469         err = genlmsg_reply(msg, info);
3470         goto out;
3471
3472 nla_put_failure:
3473         genlmsg_cancel(msg, hdr);
3474 put_failure:
3475         nlmsg_free(msg);
3476         err = -EMSGSIZE;
3477 out:
3478         mutex_unlock(&cfg80211_mutex);
3479         return err;
3480 }
3481
3482 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3483 {
3484         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3485         struct nlattr *nl_reg_rule;
3486         char *alpha2 = NULL;
3487         int rem_reg_rules = 0, r = 0;
3488         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3489         u8 dfs_region = 0;
3490         struct ieee80211_regdomain *rd = NULL;
3491
3492         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3493                 return -EINVAL;
3494
3495         if (!info->attrs[NL80211_ATTR_REG_RULES])
3496                 return -EINVAL;
3497
3498         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3499
3500         if (info->attrs[NL80211_ATTR_DFS_REGION])
3501                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3502
3503         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3504                         rem_reg_rules) {
3505                 num_rules++;
3506                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3507                         return -EINVAL;
3508         }
3509
3510         mutex_lock(&cfg80211_mutex);
3511
3512         if (!reg_is_valid_request(alpha2)) {
3513                 r = -EINVAL;
3514                 goto bad_reg;
3515         }
3516
3517         size_of_regd = sizeof(struct ieee80211_regdomain) +
3518                 (num_rules * sizeof(struct ieee80211_reg_rule));
3519
3520         rd = kzalloc(size_of_regd, GFP_KERNEL);
3521         if (!rd) {
3522                 r = -ENOMEM;
3523                 goto bad_reg;
3524         }
3525
3526         rd->n_reg_rules = num_rules;
3527         rd->alpha2[0] = alpha2[0];
3528         rd->alpha2[1] = alpha2[1];
3529
3530         /*
3531          * Disable DFS master mode if the DFS region was
3532          * not supported or known on this kernel.
3533          */
3534         if (reg_supported_dfs_region(dfs_region))
3535                 rd->dfs_region = dfs_region;
3536
3537         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3538                         rem_reg_rules) {
3539                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3540                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3541                         reg_rule_policy);
3542                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3543                 if (r)
3544                         goto bad_reg;
3545
3546                 rule_idx++;
3547
3548                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3549                         r = -EINVAL;
3550                         goto bad_reg;
3551                 }
3552         }
3553
3554         BUG_ON(rule_idx != num_rules);
3555
3556         r = set_regdom(rd);
3557
3558         mutex_unlock(&cfg80211_mutex);
3559
3560         return r;
3561
3562  bad_reg:
3563         mutex_unlock(&cfg80211_mutex);
3564         kfree(rd);
3565         return r;
3566 }
3567
3568 static int validate_scan_freqs(struct nlattr *freqs)
3569 {
3570         struct nlattr *attr1, *attr2;
3571         int n_channels = 0, tmp1, tmp2;
3572
3573         nla_for_each_nested(attr1, freqs, tmp1) {
3574                 n_channels++;
3575                 /*
3576                  * Some hardware has a limited channel list for
3577                  * scanning, and it is pretty much nonsensical
3578                  * to scan for a channel twice, so disallow that
3579                  * and don't require drivers to check that the
3580                  * channel list they get isn't longer than what
3581                  * they can scan, as long as they can scan all
3582                  * the channels they registered at once.
3583                  */
3584                 nla_for_each_nested(attr2, freqs, tmp2)
3585                         if (attr1 != attr2 &&
3586                             nla_get_u32(attr1) == nla_get_u32(attr2))
3587                                 return 0;
3588         }
3589
3590         return n_channels;
3591 }
3592
3593 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3594 {
3595         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3596         struct net_device *dev = info->user_ptr[1];
3597         struct cfg80211_scan_request *request;
3598         struct nlattr *attr;
3599         struct wiphy *wiphy;
3600         int err, tmp, n_ssids = 0, n_channels, i;
3601         size_t ie_len;
3602
3603         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3604                 return -EINVAL;
3605
3606         wiphy = &rdev->wiphy;
3607
3608         if (!rdev->ops->scan)
3609                 return -EOPNOTSUPP;
3610
3611         if (rdev->scan_req)
3612                 return -EBUSY;
3613
3614         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3615                 n_channels = validate_scan_freqs(
3616                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3617                 if (!n_channels)
3618                         return -EINVAL;
3619         } else {
3620                 enum ieee80211_band band;
3621                 n_channels = 0;
3622
3623                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3624                         if (wiphy->bands[band])
3625                                 n_channels += wiphy->bands[band]->n_channels;
3626         }
3627
3628         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3629                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3630                         n_ssids++;
3631
3632         if (n_ssids > wiphy->max_scan_ssids)
3633                 return -EINVAL;
3634
3635         if (info->attrs[NL80211_ATTR_IE])
3636                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3637         else
3638                 ie_len = 0;
3639
3640         if (ie_len > wiphy->max_scan_ie_len)
3641                 return -EINVAL;
3642
3643         request = kzalloc(sizeof(*request)
3644                         + sizeof(*request->ssids) * n_ssids
3645                         + sizeof(*request->channels) * n_channels
3646                         + ie_len, GFP_KERNEL);
3647         if (!request)
3648                 return -ENOMEM;
3649
3650         if (n_ssids)
3651                 request->ssids = (void *)&request->channels[n_channels];
3652         request->n_ssids = n_ssids;
3653         if (ie_len) {
3654                 if (request->ssids)
3655                         request->ie = (void *)(request->ssids + n_ssids);
3656                 else
3657                         request->ie = (void *)(request->channels + n_channels);
3658         }
3659
3660         i = 0;
3661         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3662                 /* user specified, bail out if channel not found */
3663                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3664                         struct ieee80211_channel *chan;
3665
3666                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3667
3668                         if (!chan) {
3669                                 err = -EINVAL;
3670                                 goto out_free;
3671                         }
3672
3673                         /* ignore disabled channels */
3674                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3675                                 continue;
3676
3677                         request->channels[i] = chan;
3678                         i++;
3679                 }
3680         } else {
3681                 enum ieee80211_band band;
3682
3683                 /* all channels */
3684                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3685                         int j;
3686                         if (!wiphy->bands[band])
3687                                 continue;
3688                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3689                                 struct ieee80211_channel *chan;
3690
3691                                 chan = &wiphy->bands[band]->channels[j];
3692
3693                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3694                                         continue;
3695
3696                                 request->channels[i] = chan;
3697                                 i++;
3698                         }
3699                 }
3700         }
3701
3702         if (!i) {
3703                 err = -EINVAL;
3704                 goto out_free;
3705         }
3706
3707         request->n_channels = i;
3708
3709         i = 0;
3710         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3711                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3712                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3713                                 err = -EINVAL;
3714                                 goto out_free;
3715                         }
3716                         request->ssids[i].ssid_len = nla_len(attr);
3717                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3718                         i++;
3719                 }
3720         }
3721
3722         if (info->attrs[NL80211_ATTR_IE]) {
3723                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3724                 memcpy((void *)request->ie,
3725                        nla_data(info->attrs[NL80211_ATTR_IE]),
3726                        request->ie_len);
3727         }
3728
3729         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3730                 if (wiphy->bands[i])
3731                         request->rates[i] =
3732                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3733
3734         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3735                 nla_for_each_nested(attr,
3736                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3737                                     tmp) {
3738                         enum ieee80211_band band = nla_type(attr);
3739
3740                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3741                                 err = -EINVAL;
3742                                 goto out_free;
3743                         }
3744                         err = ieee80211_get_ratemask(wiphy->bands[band],
3745                                                      nla_data(attr),
3746                                                      nla_len(attr),
3747                                                      &request->rates[band]);
3748                         if (err)
3749                                 goto out_free;
3750                 }
3751         }
3752
3753         request->no_cck =
3754                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3755
3756         request->dev = dev;
3757         request->wiphy = &rdev->wiphy;
3758
3759         rdev->scan_req = request;
3760         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3761
3762         if (!err) {
3763                 nl80211_send_scan_start(rdev, dev);
3764                 dev_hold(dev);
3765         } else {
3766  out_free:
3767                 rdev->scan_req = NULL;
3768                 kfree(request);
3769         }
3770
3771         return err;
3772 }
3773
3774 static int nl80211_start_sched_scan(struct sk_buff *skb,
3775                                     struct genl_info *info)
3776 {
3777         struct cfg80211_sched_scan_request *request;
3778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3779         struct net_device *dev = info->user_ptr[1];
3780         struct nlattr *attr;
3781         struct wiphy *wiphy;
3782         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3783         u32 interval;
3784         enum ieee80211_band band;
3785         size_t ie_len;
3786         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3787
3788         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3789             !rdev->ops->sched_scan_start)
3790                 return -EOPNOTSUPP;
3791
3792         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3793                 return -EINVAL;
3794
3795         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3796                 return -EINVAL;
3797
3798         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3799         if (interval == 0)
3800                 return -EINVAL;
3801
3802         wiphy = &rdev->wiphy;
3803
3804         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3805                 n_channels = validate_scan_freqs(
3806                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3807                 if (!n_channels)
3808                         return -EINVAL;
3809         } else {
3810                 n_channels = 0;
3811
3812                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3813                         if (wiphy->bands[band])
3814                                 n_channels += wiphy->bands[band]->n_channels;
3815         }
3816
3817         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3818                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3819                                     tmp)
3820                         n_ssids++;
3821
3822         if (n_ssids > wiphy->max_sched_scan_ssids)
3823                 return -EINVAL;
3824
3825         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3826                 nla_for_each_nested(attr,
3827                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3828                                     tmp)
3829                         n_match_sets++;
3830
3831         if (n_match_sets > wiphy->max_match_sets)
3832                 return -EINVAL;
3833
3834         if (info->attrs[NL80211_ATTR_IE])
3835                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3836         else
3837                 ie_len = 0;
3838
3839         if (ie_len > wiphy->max_sched_scan_ie_len)
3840                 return -EINVAL;
3841
3842         mutex_lock(&rdev->sched_scan_mtx);
3843
3844         if (rdev->sched_scan_req) {
3845                 err = -EINPROGRESS;
3846                 goto out;
3847         }
3848
3849         request = kzalloc(sizeof(*request)
3850                         + sizeof(*request->ssids) * n_ssids
3851                         + sizeof(*request->match_sets) * n_match_sets
3852                         + sizeof(*request->channels) * n_channels
3853                         + ie_len, GFP_KERNEL);
3854         if (!request) {
3855                 err = -ENOMEM;
3856                 goto out;
3857         }
3858
3859         if (n_ssids)
3860                 request->ssids = (void *)&request->channels[n_channels];
3861         request->n_ssids = n_ssids;
3862         if (ie_len) {
3863                 if (request->ssids)
3864                         request->ie = (void *)(request->ssids + n_ssids);
3865                 else
3866                         request->ie = (void *)(request->channels + n_channels);
3867         }
3868
3869         if (n_match_sets) {
3870                 if (request->ie)
3871                         request->match_sets = (void *)(request->ie + ie_len);
3872                 else if (request->ssids)
3873                         request->match_sets =
3874                                 (void *)(request->ssids + n_ssids);
3875                 else
3876                         request->match_sets =
3877                                 (void *)(request->channels + n_channels);
3878         }
3879         request->n_match_sets = n_match_sets;
3880
3881         i = 0;
3882         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3883                 /* user specified, bail out if channel not found */
3884                 nla_for_each_nested(attr,
3885                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3886                                     tmp) {
3887                         struct ieee80211_channel *chan;
3888
3889                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3890
3891                         if (!chan) {
3892                                 err = -EINVAL;
3893                                 goto out_free;
3894                         }
3895
3896                         /* ignore disabled channels */
3897                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3898                                 continue;
3899
3900                         request->channels[i] = chan;
3901                         i++;
3902                 }
3903         } else {
3904                 /* all channels */
3905                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3906                         int j;
3907                         if (!wiphy->bands[band])
3908                                 continue;
3909                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3910                                 struct ieee80211_channel *chan;
3911
3912                                 chan = &wiphy->bands[band]->channels[j];
3913
3914                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3915                                         continue;
3916
3917                                 request->channels[i] = chan;
3918                                 i++;
3919                         }
3920                 }
3921         }
3922
3923         if (!i) {
3924                 err = -EINVAL;
3925                 goto out_free;
3926         }
3927
3928         request->n_channels = i;
3929
3930         i = 0;
3931         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3932                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3933                                     tmp) {
3934                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3935                                 err = -EINVAL;
3936                                 goto out_free;
3937                         }
3938                         request->ssids[i].ssid_len = nla_len(attr);
3939                         memcpy(request->ssids[i].ssid, nla_data(attr),
3940                                nla_len(attr));
3941                         i++;
3942                 }
3943         }
3944
3945         i = 0;
3946         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
3947                 nla_for_each_nested(attr,
3948                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3949                                     tmp) {
3950                         struct nlattr *ssid;
3951
3952                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
3953                                   nla_data(attr), nla_len(attr),
3954                                   nl80211_match_policy);
3955                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
3956                         if (ssid) {
3957                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
3958                                         err = -EINVAL;
3959                                         goto out_free;
3960                                 }
3961                                 memcpy(request->match_sets[i].ssid.ssid,
3962                                        nla_data(ssid), nla_len(ssid));
3963                                 request->match_sets[i].ssid.ssid_len =
3964                                         nla_len(ssid);
3965                         }
3966                         i++;
3967                 }
3968         }
3969
3970         if (info->attrs[NL80211_ATTR_IE]) {
3971                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3972                 memcpy((void *)request->ie,
3973                        nla_data(info->attrs[NL80211_ATTR_IE]),
3974                        request->ie_len);
3975         }
3976
3977         request->dev = dev;
3978         request->wiphy = &rdev->wiphy;
3979         request->interval = interval;
3980
3981         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
3982         if (!err) {
3983                 rdev->sched_scan_req = request;
3984                 nl80211_send_sched_scan(rdev, dev,
3985                                         NL80211_CMD_START_SCHED_SCAN);
3986                 goto out;
3987         }
3988
3989 out_free:
3990         kfree(request);
3991 out:
3992         mutex_unlock(&rdev->sched_scan_mtx);
3993         return err;
3994 }
3995
3996 static int nl80211_stop_sched_scan(struct sk_buff *skb,
3997                                    struct genl_info *info)
3998 {
3999         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4000         int err;
4001
4002         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4003             !rdev->ops->sched_scan_stop)
4004                 return -EOPNOTSUPP;
4005
4006         mutex_lock(&rdev->sched_scan_mtx);
4007         err = __cfg80211_stop_sched_scan(rdev, false);
4008         mutex_unlock(&rdev->sched_scan_mtx);
4009
4010         return err;
4011 }
4012
4013 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4014                             u32 seq, int flags,
4015                             struct cfg80211_registered_device *rdev,
4016                             struct wireless_dev *wdev,
4017                             struct cfg80211_internal_bss *intbss)
4018 {
4019         struct cfg80211_bss *res = &intbss->pub;
4020         void *hdr;
4021         struct nlattr *bss;
4022         int i;
4023
4024         ASSERT_WDEV_LOCK(wdev);
4025
4026         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4027                              NL80211_CMD_NEW_SCAN_RESULTS);
4028         if (!hdr)
4029                 return -1;
4030
4031         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4032
4033         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
4034         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
4035
4036         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4037         if (!bss)
4038                 goto nla_put_failure;
4039         if (!is_zero_ether_addr(res->bssid))
4040                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
4041         if (res->information_elements && res->len_information_elements)
4042                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4043                         res->len_information_elements,
4044                         res->information_elements);
4045         if (res->beacon_ies && res->len_beacon_ies &&
4046             res->beacon_ies != res->information_elements)
4047                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
4048                         res->len_beacon_ies, res->beacon_ies);
4049         if (res->tsf)
4050                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
4051         if (res->beacon_interval)
4052                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
4053         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
4054         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
4055         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
4056                 jiffies_to_msecs(jiffies - intbss->ts));
4057
4058         switch (rdev->wiphy.signal_type) {
4059         case CFG80211_SIGNAL_TYPE_MBM:
4060                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
4061                 break;
4062         case CFG80211_SIGNAL_TYPE_UNSPEC:
4063                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
4064                 break;
4065         default:
4066                 break;
4067         }
4068
4069         switch (wdev->iftype) {
4070         case NL80211_IFTYPE_P2P_CLIENT:
4071         case NL80211_IFTYPE_STATION:
4072                 if (intbss == wdev->current_bss)
4073                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4074                                     NL80211_BSS_STATUS_ASSOCIATED);
4075                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
4076                         if (intbss != wdev->auth_bsses[i])
4077                                 continue;
4078                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4079                                     NL80211_BSS_STATUS_AUTHENTICATED);
4080                         break;
4081                 }
4082                 break;
4083         case NL80211_IFTYPE_ADHOC:
4084                 if (intbss == wdev->current_bss)
4085                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4086                                     NL80211_BSS_STATUS_IBSS_JOINED);
4087                 break;
4088         default:
4089                 break;
4090         }
4091
4092         nla_nest_end(msg, bss);
4093
4094         return genlmsg_end(msg, hdr);
4095
4096  nla_put_failure:
4097         genlmsg_cancel(msg, hdr);
4098         return -EMSGSIZE;
4099 }
4100
4101 static int nl80211_dump_scan(struct sk_buff *skb,
4102                              struct netlink_callback *cb)
4103 {
4104         struct cfg80211_registered_device *rdev;
4105         struct net_device *dev;
4106         struct cfg80211_internal_bss *scan;
4107         struct wireless_dev *wdev;
4108         int start = cb->args[1], idx = 0;
4109         int err;
4110
4111         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4112         if (err)
4113                 return err;
4114
4115         wdev = dev->ieee80211_ptr;
4116
4117         wdev_lock(wdev);
4118         spin_lock_bh(&rdev->bss_lock);
4119         cfg80211_bss_expire(rdev);
4120
4121         cb->seq = rdev->bss_generation;
4122
4123         list_for_each_entry(scan, &rdev->bss_list, list) {
4124                 if (++idx <= start)
4125                         continue;
4126                 if (nl80211_send_bss(skb, cb,
4127                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4128                                 rdev, wdev, scan) < 0) {
4129                         idx--;
4130                         break;
4131                 }
4132         }
4133
4134         spin_unlock_bh(&rdev->bss_lock);
4135         wdev_unlock(wdev);
4136
4137         cb->args[1] = idx;
4138         nl80211_finish_netdev_dump(rdev);
4139
4140         return skb->len;
4141 }
4142
4143 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4144                                 int flags, struct net_device *dev,
4145                                 struct survey_info *survey)
4146 {
4147         void *hdr;
4148         struct nlattr *infoattr;
4149
4150         hdr = nl80211hdr_put(msg, pid, seq, flags,
4151                              NL80211_CMD_NEW_SURVEY_RESULTS);
4152         if (!hdr)
4153                 return -ENOMEM;
4154
4155         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4156
4157         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4158         if (!infoattr)
4159                 goto nla_put_failure;
4160
4161         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4162                     survey->channel->center_freq);
4163         if (survey->filled & SURVEY_INFO_NOISE_DBM)
4164                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4165                             survey->noise);
4166         if (survey->filled & SURVEY_INFO_IN_USE)
4167                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4168         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4169                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4170                             survey->channel_time);
4171         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4172                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4173                             survey->channel_time_busy);
4174         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4175                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4176                             survey->channel_time_ext_busy);
4177         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4178                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4179                             survey->channel_time_rx);
4180         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4181                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4182                             survey->channel_time_tx);
4183
4184         nla_nest_end(msg, infoattr);
4185
4186         return genlmsg_end(msg, hdr);
4187
4188  nla_put_failure:
4189         genlmsg_cancel(msg, hdr);
4190         return -EMSGSIZE;
4191 }
4192
4193 static int nl80211_dump_survey(struct sk_buff *skb,
4194                         struct netlink_callback *cb)
4195 {
4196         struct survey_info survey;
4197         struct cfg80211_registered_device *dev;
4198         struct net_device *netdev;
4199         int survey_idx = cb->args[1];
4200         int res;
4201
4202         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4203         if (res)
4204                 return res;
4205
4206         if (!dev->ops->dump_survey) {
4207                 res = -EOPNOTSUPP;
4208                 goto out_err;
4209         }
4210
4211         while (1) {
4212                 struct ieee80211_channel *chan;
4213
4214                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4215                                             &survey);
4216                 if (res == -ENOENT)
4217                         break;
4218                 if (res)
4219                         goto out_err;
4220
4221                 /* Survey without a channel doesn't make sense */
4222                 if (!survey.channel) {
4223                         res = -EINVAL;
4224                         goto out;
4225                 }
4226
4227                 chan = ieee80211_get_channel(&dev->wiphy,
4228                                              survey.channel->center_freq);
4229                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4230                         survey_idx++;
4231                         continue;
4232                 }
4233
4234                 if (nl80211_send_survey(skb,
4235                                 NETLINK_CB(cb->skb).pid,
4236                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4237                                 netdev,
4238                                 &survey) < 0)
4239                         goto out;
4240                 survey_idx++;
4241         }
4242
4243  out:
4244         cb->args[1] = survey_idx;
4245         res = skb->len;
4246  out_err:
4247         nl80211_finish_netdev_dump(dev);
4248         return res;
4249 }
4250
4251 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4252 {
4253         return auth_type <= NL80211_AUTHTYPE_MAX;
4254 }
4255
4256 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4257 {
4258         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4259                                   NL80211_WPA_VERSION_2));
4260 }
4261
4262 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4263 {
4264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4265         struct net_device *dev = info->user_ptr[1];
4266         struct ieee80211_channel *chan;
4267         const u8 *bssid, *ssid, *ie = NULL;
4268         int err, ssid_len, ie_len = 0;
4269         enum nl80211_auth_type auth_type;
4270         struct key_parse key;
4271         bool local_state_change;
4272
4273         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4274                 return -EINVAL;
4275
4276         if (!info->attrs[NL80211_ATTR_MAC])
4277                 return -EINVAL;
4278
4279         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4280                 return -EINVAL;
4281
4282         if (!info->attrs[NL80211_ATTR_SSID])
4283                 return -EINVAL;
4284
4285         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4286                 return -EINVAL;
4287
4288         err = nl80211_parse_key(info, &key);
4289         if (err)
4290                 return err;
4291
4292         if (key.idx >= 0) {
4293                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4294                         return -EINVAL;
4295                 if (!key.p.key || !key.p.key_len)
4296                         return -EINVAL;
4297                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4298                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4299                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4300                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4301                         return -EINVAL;
4302                 if (key.idx > 4)
4303                         return -EINVAL;
4304         } else {
4305                 key.p.key_len = 0;
4306                 key.p.key = NULL;
4307         }
4308
4309         if (key.idx >= 0) {
4310                 int i;
4311                 bool ok = false;
4312                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4313                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4314                                 ok = true;
4315                                 break;
4316                         }
4317                 }
4318                 if (!ok)
4319                         return -EINVAL;
4320         }
4321
4322         if (!rdev->ops->auth)
4323                 return -EOPNOTSUPP;
4324
4325         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4326             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4327                 return -EOPNOTSUPP;
4328
4329         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4330         chan = ieee80211_get_channel(&rdev->wiphy,
4331                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4332         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4333                 return -EINVAL;
4334
4335         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4336         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4337
4338         if (info->attrs[NL80211_ATTR_IE]) {
4339                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4340                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4341         }
4342
4343         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4344         if (!nl80211_valid_auth_type(auth_type))
4345                 return -EINVAL;
4346
4347         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4348
4349         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4350                                   ssid, ssid_len, ie, ie_len,
4351                                   key.p.key, key.p.key_len, key.idx,
4352                                   local_state_change);
4353 }
4354
4355 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4356                                    struct genl_info *info,
4357                                    struct cfg80211_crypto_settings *settings,
4358                                    int cipher_limit)
4359 {
4360         memset(settings, 0, sizeof(*settings));
4361
4362         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4363
4364         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4365                 u16 proto;
4366                 proto = nla_get_u16(
4367                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4368                 settings->control_port_ethertype = cpu_to_be16(proto);
4369                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4370                     proto != ETH_P_PAE)
4371                         return -EINVAL;
4372                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4373                         settings->control_port_no_encrypt = true;
4374         } else
4375                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4376
4377         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4378                 void *data;
4379                 int len, i;
4380
4381                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4382                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4383                 settings->n_ciphers_pairwise = len / sizeof(u32);
4384
4385                 if (len % sizeof(u32))
4386                         return -EINVAL;
4387
4388                 if (settings->n_ciphers_pairwise > cipher_limit)
4389                         return -EINVAL;
4390
4391                 memcpy(settings->ciphers_pairwise, data, len);
4392
4393                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4394                         if (!cfg80211_supported_cipher_suite(
4395                                         &rdev->wiphy,
4396                                         settings->ciphers_pairwise[i]))
4397                                 return -EINVAL;
4398         }
4399
4400         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4401                 settings->cipher_group =
4402                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4403                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4404                                                      settings->cipher_group))
4405                         return -EINVAL;
4406         }
4407
4408         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4409                 settings->wpa_versions =
4410                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4411                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4412                         return -EINVAL;
4413         }
4414
4415         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4416                 void *data;
4417                 int len;
4418
4419                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4420                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4421                 settings->n_akm_suites = len / sizeof(u32);
4422
4423                 if (len % sizeof(u32))
4424                         return -EINVAL;
4425
4426                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4427                         return -EINVAL;
4428
4429                 memcpy(settings->akm_suites, data, len);
4430         }
4431
4432         return 0;
4433 }
4434
4435 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4436 {
4437         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4438         struct net_device *dev = info->user_ptr[1];
4439         struct cfg80211_crypto_settings crypto;
4440         struct ieee80211_channel *chan;
4441         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4442         int err, ssid_len, ie_len = 0;
4443         bool use_mfp = false;
4444         u32 flags = 0;
4445         struct ieee80211_ht_cap *ht_capa = NULL;
4446         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4447
4448         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4449                 return -EINVAL;
4450
4451         if (!info->attrs[NL80211_ATTR_MAC] ||
4452             !info->attrs[NL80211_ATTR_SSID] ||
4453             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4454                 return -EINVAL;
4455
4456         if (!rdev->ops->assoc)
4457                 return -EOPNOTSUPP;
4458
4459         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4460             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4461                 return -EOPNOTSUPP;
4462
4463         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4464
4465         chan = ieee80211_get_channel(&rdev->wiphy,
4466                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4467         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4468                 return -EINVAL;
4469
4470         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4471         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4472
4473         if (info->attrs[NL80211_ATTR_IE]) {
4474                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4475                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4476         }
4477
4478         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4479                 enum nl80211_mfp mfp =
4480                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4481                 if (mfp == NL80211_MFP_REQUIRED)
4482                         use_mfp = true;
4483                 else if (mfp != NL80211_MFP_NO)
4484                         return -EINVAL;
4485         }
4486
4487         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4488                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4489
4490         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4491                 flags |= ASSOC_REQ_DISABLE_HT;
4492
4493         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4494                 ht_capa_mask =
4495                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4496
4497         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4498                 if (!ht_capa_mask)
4499                         return -EINVAL;
4500                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4501         }
4502
4503         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4504         if (!err)
4505                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4506                                           ssid, ssid_len, ie, ie_len, use_mfp,
4507                                           &crypto, flags, ht_capa,
4508                                           ht_capa_mask);
4509
4510         return err;
4511 }
4512
4513 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4514 {
4515         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4516         struct net_device *dev = info->user_ptr[1];
4517         const u8 *ie = NULL, *bssid;
4518         int ie_len = 0;
4519         u16 reason_code;
4520         bool local_state_change;
4521
4522         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4523                 return -EINVAL;
4524
4525         if (!info->attrs[NL80211_ATTR_MAC])
4526                 return -EINVAL;
4527
4528         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4529                 return -EINVAL;
4530
4531         if (!rdev->ops->deauth)
4532                 return -EOPNOTSUPP;
4533
4534         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4535             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4536                 return -EOPNOTSUPP;
4537
4538         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4539
4540         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4541         if (reason_code == 0) {
4542                 /* Reason Code 0 is reserved */
4543                 return -EINVAL;
4544         }
4545
4546         if (info->attrs[NL80211_ATTR_IE]) {
4547                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4548                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4549         }
4550
4551         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4552
4553         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4554                                     local_state_change);
4555 }
4556
4557 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4558 {
4559         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4560         struct net_device *dev = info->user_ptr[1];
4561         const u8 *ie = NULL, *bssid;
4562         int ie_len = 0;
4563         u16 reason_code;
4564         bool local_state_change;
4565
4566         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4567                 return -EINVAL;
4568
4569         if (!info->attrs[NL80211_ATTR_MAC])
4570                 return -EINVAL;
4571
4572         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4573                 return -EINVAL;
4574
4575         if (!rdev->ops->disassoc)
4576                 return -EOPNOTSUPP;
4577
4578         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4579             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4580                 return -EOPNOTSUPP;
4581
4582         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4583
4584         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4585         if (reason_code == 0) {
4586                 /* Reason Code 0 is reserved */
4587                 return -EINVAL;
4588         }
4589
4590         if (info->attrs[NL80211_ATTR_IE]) {
4591                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4592                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4593         }
4594
4595         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4596
4597         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4598                                       local_state_change);
4599 }
4600
4601 static bool
4602 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4603                          int mcast_rate[IEEE80211_NUM_BANDS],
4604                          int rateval)
4605 {
4606         struct wiphy *wiphy = &rdev->wiphy;
4607         bool found = false;
4608         int band, i;
4609
4610         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4611                 struct ieee80211_supported_band *sband;
4612
4613                 sband = wiphy->bands[band];
4614                 if (!sband)
4615                         continue;
4616
4617                 for (i = 0; i < sband->n_bitrates; i++) {
4618                         if (sband->bitrates[i].bitrate == rateval) {
4619                                 mcast_rate[band] = i + 1;
4620                                 found = true;
4621                                 break;
4622                         }
4623                 }
4624         }
4625
4626         return found;
4627 }
4628
4629 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4630 {
4631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4632         struct net_device *dev = info->user_ptr[1];
4633         struct cfg80211_ibss_params ibss;
4634         struct wiphy *wiphy;
4635         struct cfg80211_cached_keys *connkeys = NULL;
4636         int err;
4637
4638         memset(&ibss, 0, sizeof(ibss));
4639
4640         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4641                 return -EINVAL;
4642
4643         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4644             !info->attrs[NL80211_ATTR_SSID] ||
4645             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4646                 return -EINVAL;
4647
4648         ibss.beacon_interval = 100;
4649
4650         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4651                 ibss.beacon_interval =
4652                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4653                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4654                         return -EINVAL;
4655         }
4656
4657         if (!rdev->ops->join_ibss)
4658                 return -EOPNOTSUPP;
4659
4660         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4661                 return -EOPNOTSUPP;
4662
4663         wiphy = &rdev->wiphy;
4664
4665         if (info->attrs[NL80211_ATTR_MAC]) {
4666                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4667
4668                 if (!is_valid_ether_addr(ibss.bssid))
4669                         return -EINVAL;
4670         }
4671         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4672         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4673
4674         if (info->attrs[NL80211_ATTR_IE]) {
4675                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4676                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4677         }
4678
4679         ibss.channel = ieee80211_get_channel(wiphy,
4680                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4681         if (!ibss.channel ||
4682             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4683             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4684                 return -EINVAL;
4685
4686         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4687         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4688
4689         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4690                 u8 *rates =
4691                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4692                 int n_rates =
4693                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4694                 struct ieee80211_supported_band *sband =
4695                         wiphy->bands[ibss.channel->band];
4696                 int err;
4697
4698                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4699                                              &ibss.basic_rates);
4700                 if (err)
4701                         return err;
4702         }
4703
4704         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4705             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4706                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4707                 return -EINVAL;
4708
4709         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4710                 connkeys = nl80211_parse_connkeys(rdev,
4711                                         info->attrs[NL80211_ATTR_KEYS]);
4712                 if (IS_ERR(connkeys))
4713                         return PTR_ERR(connkeys);
4714         }
4715
4716         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4717         if (err)
4718                 kfree(connkeys);
4719         return err;
4720 }
4721
4722 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4723 {
4724         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4725         struct net_device *dev = info->user_ptr[1];
4726
4727         if (!rdev->ops->leave_ibss)
4728                 return -EOPNOTSUPP;
4729
4730         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4731                 return -EOPNOTSUPP;
4732
4733         return cfg80211_leave_ibss(rdev, dev, false);
4734 }
4735
4736 #ifdef CONFIG_NL80211_TESTMODE
4737 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4738         .name = "testmode",
4739 };
4740
4741 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4742 {
4743         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4744         int err;
4745
4746         if (!info->attrs[NL80211_ATTR_TESTDATA])
4747                 return -EINVAL;
4748
4749         err = -EOPNOTSUPP;
4750         if (rdev->ops->testmode_cmd) {
4751                 rdev->testmode_info = info;
4752                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4753                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4754                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4755                 rdev->testmode_info = NULL;
4756         }
4757
4758         return err;
4759 }
4760
4761 static int nl80211_testmode_dump(struct sk_buff *skb,
4762                                  struct netlink_callback *cb)
4763 {
4764         struct cfg80211_registered_device *dev;
4765         int err;
4766         long phy_idx;
4767         void *data = NULL;
4768         int data_len = 0;
4769
4770         if (cb->args[0]) {
4771                 /*
4772                  * 0 is a valid index, but not valid for args[0],
4773                  * so we need to offset by 1.
4774                  */
4775                 phy_idx = cb->args[0] - 1;
4776         } else {
4777                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4778                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4779                                   nl80211_policy);
4780                 if (err)
4781                         return err;
4782                 if (!nl80211_fam.attrbuf[NL80211_ATTR_WIPHY])
4783                         return -EINVAL;
4784                 phy_idx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4785                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4786                         cb->args[1] =
4787                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4788         }
4789
4790         if (cb->args[1]) {
4791                 data = nla_data((void *)cb->args[1]);
4792                 data_len = nla_len((void *)cb->args[1]);
4793         }
4794
4795         mutex_lock(&cfg80211_mutex);
4796         dev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4797         if (!dev) {
4798                 mutex_unlock(&cfg80211_mutex);
4799                 return -ENOENT;
4800         }
4801         cfg80211_lock_rdev(dev);
4802         mutex_unlock(&cfg80211_mutex);
4803
4804         if (!dev->ops->testmode_dump) {
4805                 err = -EOPNOTSUPP;
4806                 goto out_err;
4807         }
4808
4809         while (1) {
4810                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4811                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4812                                            NL80211_CMD_TESTMODE);
4813                 struct nlattr *tmdata;
4814
4815                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, dev->wiphy_idx) < 0) {
4816                         genlmsg_cancel(skb, hdr);
4817                         break;
4818                 }
4819
4820                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4821                 if (!tmdata) {
4822                         genlmsg_cancel(skb, hdr);
4823                         break;
4824                 }
4825                 err = dev->ops->testmode_dump(&dev->wiphy, skb, cb,
4826                                               data, data_len);
4827                 nla_nest_end(skb, tmdata);
4828
4829                 if (err == -ENOBUFS || err == -ENOENT) {
4830                         genlmsg_cancel(skb, hdr);
4831                         break;
4832                 } else if (err) {
4833                         genlmsg_cancel(skb, hdr);
4834                         goto out_err;
4835                 }
4836
4837                 genlmsg_end(skb, hdr);
4838         }
4839
4840         err = skb->len;
4841         /* see above */
4842         cb->args[0] = phy_idx + 1;
4843  out_err:
4844         cfg80211_unlock_rdev(dev);
4845         return err;
4846 }
4847
4848 static struct sk_buff *
4849 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4850                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4851 {
4852         struct sk_buff *skb;
4853         void *hdr;
4854         struct nlattr *data;
4855
4856         skb = nlmsg_new(approxlen + 100, gfp);
4857         if (!skb)
4858                 return NULL;
4859
4860         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4861         if (!hdr) {
4862                 kfree_skb(skb);
4863                 return NULL;
4864         }
4865
4866         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4867         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4868
4869         ((void **)skb->cb)[0] = rdev;
4870         ((void **)skb->cb)[1] = hdr;
4871         ((void **)skb->cb)[2] = data;
4872
4873         return skb;
4874
4875  nla_put_failure:
4876         kfree_skb(skb);
4877         return NULL;
4878 }
4879
4880 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4881                                                   int approxlen)
4882 {
4883         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4884
4885         if (WARN_ON(!rdev->testmode_info))
4886                 return NULL;
4887
4888         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4889                                 rdev->testmode_info->snd_pid,
4890                                 rdev->testmode_info->snd_seq,
4891                                 GFP_KERNEL);
4892 }
4893 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4894
4895 int cfg80211_testmode_reply(struct sk_buff *skb)
4896 {
4897         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4898         void *hdr = ((void **)skb->cb)[1];
4899         struct nlattr *data = ((void **)skb->cb)[2];
4900
4901         if (WARN_ON(!rdev->testmode_info)) {
4902                 kfree_skb(skb);
4903                 return -EINVAL;
4904         }
4905
4906         nla_nest_end(skb, data);
4907         genlmsg_end(skb, hdr);
4908         return genlmsg_reply(skb, rdev->testmode_info);
4909 }
4910 EXPORT_SYMBOL(cfg80211_testmode_reply);
4911
4912 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4913                                                   int approxlen, gfp_t gfp)
4914 {
4915         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4916
4917         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4918 }
4919 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4920
4921 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4922 {
4923         void *hdr = ((void **)skb->cb)[1];
4924         struct nlattr *data = ((void **)skb->cb)[2];
4925
4926         nla_nest_end(skb, data);
4927         genlmsg_end(skb, hdr);
4928         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4929 }
4930 EXPORT_SYMBOL(cfg80211_testmode_event);
4931 #endif
4932
4933 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4934 {
4935         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4936         struct net_device *dev = info->user_ptr[1];
4937         struct cfg80211_connect_params connect;
4938         struct wiphy *wiphy;
4939         struct cfg80211_cached_keys *connkeys = NULL;
4940         int err;
4941
4942         memset(&connect, 0, sizeof(connect));
4943
4944         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4945                 return -EINVAL;
4946
4947         if (!info->attrs[NL80211_ATTR_SSID] ||
4948             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4949                 return -EINVAL;
4950
4951         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4952                 connect.auth_type =
4953                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4954                 if (!nl80211_valid_auth_type(connect.auth_type))
4955                         return -EINVAL;
4956         } else
4957                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4958
4959         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4960
4961         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4962                                       NL80211_MAX_NR_CIPHER_SUITES);
4963         if (err)
4964                 return err;
4965
4966         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4967             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4968                 return -EOPNOTSUPP;
4969
4970         wiphy = &rdev->wiphy;
4971
4972         if (info->attrs[NL80211_ATTR_MAC])
4973                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4974         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4975         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4976
4977         if (info->attrs[NL80211_ATTR_IE]) {
4978                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4979                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4980         }
4981
4982         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4983                 connect.channel =
4984                         ieee80211_get_channel(wiphy,
4985                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4986                 if (!connect.channel ||
4987                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4988                         return -EINVAL;
4989         }
4990
4991         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4992                 connkeys = nl80211_parse_connkeys(rdev,
4993                                         info->attrs[NL80211_ATTR_KEYS]);
4994                 if (IS_ERR(connkeys))
4995                         return PTR_ERR(connkeys);
4996         }
4997
4998         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4999                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5000
5001         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5002                 memcpy(&connect.ht_capa_mask,
5003                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5004                        sizeof(connect.ht_capa_mask));
5005
5006         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5007                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5008                         return -EINVAL;
5009                 memcpy(&connect.ht_capa,
5010                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5011                        sizeof(connect.ht_capa));
5012         }
5013
5014         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5015         if (err)
5016                 kfree(connkeys);
5017         return err;
5018 }
5019
5020 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5021 {
5022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5023         struct net_device *dev = info->user_ptr[1];
5024         u16 reason;
5025
5026         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5027                 reason = WLAN_REASON_DEAUTH_LEAVING;
5028         else
5029                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5030
5031         if (reason == 0)
5032                 return -EINVAL;
5033
5034         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5035             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5036                 return -EOPNOTSUPP;
5037
5038         return cfg80211_disconnect(rdev, dev, reason, true);
5039 }
5040
5041 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5042 {
5043         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5044         struct net *net;
5045         int err;
5046         u32 pid;
5047
5048         if (!info->attrs[NL80211_ATTR_PID])
5049                 return -EINVAL;
5050
5051         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5052
5053         net = get_net_ns_by_pid(pid);
5054         if (IS_ERR(net))
5055                 return PTR_ERR(net);
5056
5057         err = 0;
5058
5059         /* check if anything to do */
5060         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5061                 err = cfg80211_switch_netns(rdev, net);
5062
5063         put_net(net);
5064         return err;
5065 }
5066
5067 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5068 {
5069         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5070         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5071                         struct cfg80211_pmksa *pmksa) = NULL;
5072         struct net_device *dev = info->user_ptr[1];
5073         struct cfg80211_pmksa pmksa;
5074
5075         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5076
5077         if (!info->attrs[NL80211_ATTR_MAC])
5078                 return -EINVAL;
5079
5080         if (!info->attrs[NL80211_ATTR_PMKID])
5081                 return -EINVAL;
5082
5083         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5084         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5085
5086         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5087             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5088                 return -EOPNOTSUPP;
5089
5090         switch (info->genlhdr->cmd) {
5091         case NL80211_CMD_SET_PMKSA:
5092                 rdev_ops = rdev->ops->set_pmksa;
5093                 break;
5094         case NL80211_CMD_DEL_PMKSA:
5095                 rdev_ops = rdev->ops->del_pmksa;
5096                 break;
5097         default:
5098                 WARN_ON(1);
5099                 break;
5100         }
5101
5102         if (!rdev_ops)
5103                 return -EOPNOTSUPP;
5104
5105         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5106 }
5107
5108 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5109 {
5110         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5111         struct net_device *dev = info->user_ptr[1];
5112
5113         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5114             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5115                 return -EOPNOTSUPP;
5116
5117         if (!rdev->ops->flush_pmksa)
5118                 return -EOPNOTSUPP;
5119
5120         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5121 }
5122
5123 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5124 {
5125         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5126         struct net_device *dev = info->user_ptr[1];
5127         u8 action_code, dialog_token;
5128         u16 status_code;
5129         u8 *peer;
5130
5131         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5132             !rdev->ops->tdls_mgmt)
5133                 return -EOPNOTSUPP;
5134
5135         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5136             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5137             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5138             !info->attrs[NL80211_ATTR_IE] ||
5139             !info->attrs[NL80211_ATTR_MAC])
5140                 return -EINVAL;
5141
5142         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5143         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5144         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5145         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5146
5147         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5148                                     dialog_token, status_code,
5149                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5150                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5151 }
5152
5153 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5154 {
5155         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5156         struct net_device *dev = info->user_ptr[1];
5157         enum nl80211_tdls_operation operation;
5158         u8 *peer;
5159
5160         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5161             !rdev->ops->tdls_oper)
5162                 return -EOPNOTSUPP;
5163
5164         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5165             !info->attrs[NL80211_ATTR_MAC])
5166                 return -EINVAL;
5167
5168         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5169         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5170
5171         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5172 }
5173
5174 static int nl80211_remain_on_channel(struct sk_buff *skb,
5175                                      struct genl_info *info)
5176 {
5177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5178         struct net_device *dev = info->user_ptr[1];
5179         struct ieee80211_channel *chan;
5180         struct sk_buff *msg;
5181         void *hdr;
5182         u64 cookie;
5183         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5184         u32 freq, duration;
5185         int err;
5186
5187         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5188             !info->attrs[NL80211_ATTR_DURATION])
5189                 return -EINVAL;
5190
5191         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5192
5193         /*
5194          * We should be on that channel for at least one jiffie,
5195          * and more than 5 seconds seems excessive.
5196          */
5197         if (!duration || !msecs_to_jiffies(duration) ||
5198             duration > rdev->wiphy.max_remain_on_channel_duration)
5199                 return -EINVAL;
5200
5201         if (!rdev->ops->remain_on_channel ||
5202             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5203                 return -EOPNOTSUPP;
5204
5205         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5206                 channel_type = nla_get_u32(
5207                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5208                 if (channel_type != NL80211_CHAN_NO_HT &&
5209                     channel_type != NL80211_CHAN_HT20 &&
5210                     channel_type != NL80211_CHAN_HT40PLUS &&
5211                     channel_type != NL80211_CHAN_HT40MINUS)
5212                         return -EINVAL;
5213         }
5214
5215         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5216         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5217         if (chan == NULL)
5218                 return -EINVAL;
5219
5220         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5221         if (!msg)
5222                 return -ENOMEM;
5223
5224         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5225                              NL80211_CMD_REMAIN_ON_CHANNEL);
5226
5227         if (IS_ERR(hdr)) {
5228                 err = PTR_ERR(hdr);
5229                 goto free_msg;
5230         }
5231
5232         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5233                                            channel_type, duration, &cookie);
5234
5235         if (err)
5236                 goto free_msg;
5237
5238         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5239
5240         genlmsg_end(msg, hdr);
5241
5242         return genlmsg_reply(msg, info);
5243
5244  nla_put_failure:
5245         err = -ENOBUFS;
5246  free_msg:
5247         nlmsg_free(msg);
5248         return err;
5249 }
5250
5251 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5252                                             struct genl_info *info)
5253 {
5254         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5255         struct net_device *dev = info->user_ptr[1];
5256         u64 cookie;
5257
5258         if (!info->attrs[NL80211_ATTR_COOKIE])
5259                 return -EINVAL;
5260
5261         if (!rdev->ops->cancel_remain_on_channel)
5262                 return -EOPNOTSUPP;
5263
5264         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5265
5266         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5267 }
5268
5269 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5270                            u8 *rates, u8 rates_len)
5271 {
5272         u8 i;
5273         u32 mask = 0;
5274
5275         for (i = 0; i < rates_len; i++) {
5276                 int rate = (rates[i] & 0x7f) * 5;
5277                 int ridx;
5278                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5279                         struct ieee80211_rate *srate =
5280                                 &sband->bitrates[ridx];
5281                         if (rate == srate->bitrate) {
5282                                 mask |= 1 << ridx;
5283                                 break;
5284                         }
5285                 }
5286                 if (ridx == sband->n_bitrates)
5287                         return 0; /* rate not found */
5288         }
5289
5290         return mask;
5291 }
5292
5293 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5294         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5295                                     .len = NL80211_MAX_SUPP_RATES },
5296 };
5297
5298 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5299                                        struct genl_info *info)
5300 {
5301         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5302         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5303         struct cfg80211_bitrate_mask mask;
5304         int rem, i;
5305         struct net_device *dev = info->user_ptr[1];
5306         struct nlattr *tx_rates;
5307         struct ieee80211_supported_band *sband;
5308
5309         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5310                 return -EINVAL;
5311
5312         if (!rdev->ops->set_bitrate_mask)
5313                 return -EOPNOTSUPP;
5314
5315         memset(&mask, 0, sizeof(mask));
5316         /* Default to all rates enabled */
5317         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5318                 sband = rdev->wiphy.bands[i];
5319                 mask.control[i].legacy =
5320                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5321         }
5322
5323         /*
5324          * The nested attribute uses enum nl80211_band as the index. This maps
5325          * directly to the enum ieee80211_band values used in cfg80211.
5326          */
5327         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5328         {
5329                 enum ieee80211_band band = nla_type(tx_rates);
5330                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5331                         return -EINVAL;
5332                 sband = rdev->wiphy.bands[band];
5333                 if (sband == NULL)
5334                         return -EINVAL;
5335                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5336                           nla_len(tx_rates), nl80211_txattr_policy);
5337                 if (tb[NL80211_TXRATE_LEGACY]) {
5338                         mask.control[band].legacy = rateset_to_mask(
5339                                 sband,
5340                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5341                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5342                         if (mask.control[band].legacy == 0)
5343                                 return -EINVAL;
5344                 }
5345         }
5346
5347         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5348 }
5349
5350 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5351 {
5352         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5353         struct net_device *dev = info->user_ptr[1];
5354         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5355
5356         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5357                 return -EINVAL;
5358
5359         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5360                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5361
5362         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5363             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5364             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5365             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5366             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5367             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5368             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5369                 return -EOPNOTSUPP;
5370
5371         /* not much point in registering if we can't reply */
5372         if (!rdev->ops->mgmt_tx)
5373                 return -EOPNOTSUPP;
5374
5375         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5376                         frame_type,
5377                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5378                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5379 }
5380
5381 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5382 {
5383         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5384         struct net_device *dev = info->user_ptr[1];
5385         struct ieee80211_channel *chan;
5386         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5387         bool channel_type_valid = false;
5388         u32 freq;
5389         int err;
5390         void *hdr = NULL;
5391         u64 cookie;
5392         struct sk_buff *msg = NULL;
5393         unsigned int wait = 0;
5394         bool offchan, no_cck, dont_wait_for_ack;
5395
5396         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5397
5398         if (!info->attrs[NL80211_ATTR_FRAME] ||
5399             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5400                 return -EINVAL;
5401
5402         if (!rdev->ops->mgmt_tx)
5403                 return -EOPNOTSUPP;
5404
5405         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5406             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5407             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5408             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5409             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5410             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5411             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5412                 return -EOPNOTSUPP;
5413
5414         if (info->attrs[NL80211_ATTR_DURATION]) {
5415                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5416                         return -EINVAL;
5417                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5418         }
5419
5420         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5421                 channel_type = nla_get_u32(
5422                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5423                 if (channel_type != NL80211_CHAN_NO_HT &&
5424                     channel_type != NL80211_CHAN_HT20 &&
5425                     channel_type != NL80211_CHAN_HT40PLUS &&
5426                     channel_type != NL80211_CHAN_HT40MINUS)
5427                         return -EINVAL;
5428                 channel_type_valid = true;
5429         }
5430
5431         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5432
5433         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5434                 return -EINVAL;
5435
5436         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5437
5438         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5439         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5440         if (chan == NULL)
5441                 return -EINVAL;
5442
5443         if (!dont_wait_for_ack) {
5444                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5445                 if (!msg)
5446                         return -ENOMEM;
5447
5448                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5449                                      NL80211_CMD_FRAME);
5450
5451                 if (IS_ERR(hdr)) {
5452                         err = PTR_ERR(hdr);
5453                         goto free_msg;
5454                 }
5455         }
5456
5457         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5458                                     channel_type_valid, wait,
5459                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5460                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5461                                     no_cck, dont_wait_for_ack, &cookie);
5462         if (err)
5463                 goto free_msg;
5464
5465         if (msg) {
5466                 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5467
5468                 genlmsg_end(msg, hdr);
5469                 return genlmsg_reply(msg, info);
5470         }
5471
5472         return 0;
5473
5474  nla_put_failure:
5475         err = -ENOBUFS;
5476  free_msg:
5477         nlmsg_free(msg);
5478         return err;
5479 }
5480
5481 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5482 {
5483         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5484         struct net_device *dev = info->user_ptr[1];
5485         u64 cookie;
5486
5487         if (!info->attrs[NL80211_ATTR_COOKIE])
5488                 return -EINVAL;
5489
5490         if (!rdev->ops->mgmt_tx_cancel_wait)
5491                 return -EOPNOTSUPP;
5492
5493         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5494             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5495             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5496             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5497             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5498             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5499                 return -EOPNOTSUPP;
5500
5501         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5502
5503         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5504 }
5505
5506 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5507 {
5508         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5509         struct wireless_dev *wdev;
5510         struct net_device *dev = info->user_ptr[1];
5511         u8 ps_state;
5512         bool state;
5513         int err;
5514
5515         if (!info->attrs[NL80211_ATTR_PS_STATE])
5516                 return -EINVAL;
5517
5518         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5519
5520         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5521                 return -EINVAL;
5522
5523         wdev = dev->ieee80211_ptr;
5524
5525         if (!rdev->ops->set_power_mgmt)
5526                 return -EOPNOTSUPP;
5527
5528         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5529
5530         if (state == wdev->ps)
5531                 return 0;
5532
5533         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5534                                         wdev->ps_timeout);
5535         if (!err)
5536                 wdev->ps = state;
5537         return err;
5538 }
5539
5540 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5541 {
5542         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5543         enum nl80211_ps_state ps_state;
5544         struct wireless_dev *wdev;
5545         struct net_device *dev = info->user_ptr[1];
5546         struct sk_buff *msg;
5547         void *hdr;
5548         int err;
5549
5550         wdev = dev->ieee80211_ptr;
5551
5552         if (!rdev->ops->set_power_mgmt)
5553                 return -EOPNOTSUPP;
5554
5555         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5556         if (!msg)
5557                 return -ENOMEM;
5558
5559         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5560                              NL80211_CMD_GET_POWER_SAVE);
5561         if (!hdr) {
5562                 err = -ENOBUFS;
5563                 goto free_msg;
5564         }
5565
5566         if (wdev->ps)
5567                 ps_state = NL80211_PS_ENABLED;
5568         else
5569                 ps_state = NL80211_PS_DISABLED;
5570
5571         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5572
5573         genlmsg_end(msg, hdr);
5574         return genlmsg_reply(msg, info);
5575
5576  nla_put_failure:
5577         err = -ENOBUFS;
5578  free_msg:
5579         nlmsg_free(msg);
5580         return err;
5581 }
5582
5583 static struct nla_policy
5584 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5585         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5586         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5587         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5588 };
5589
5590 static int nl80211_set_cqm_rssi(struct genl_info *info,
5591                                 s32 threshold, u32 hysteresis)
5592 {
5593         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5594         struct wireless_dev *wdev;
5595         struct net_device *dev = info->user_ptr[1];
5596
5597         if (threshold > 0)
5598                 return -EINVAL;
5599
5600         wdev = dev->ieee80211_ptr;
5601
5602         if (!rdev->ops->set_cqm_rssi_config)
5603                 return -EOPNOTSUPP;
5604
5605         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5606             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5607                 return -EOPNOTSUPP;
5608
5609         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5610                                               threshold, hysteresis);
5611 }
5612
5613 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5614 {
5615         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5616         struct nlattr *cqm;
5617         int err;
5618
5619         cqm = info->attrs[NL80211_ATTR_CQM];
5620         if (!cqm) {
5621                 err = -EINVAL;
5622                 goto out;
5623         }
5624
5625         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5626                                nl80211_attr_cqm_policy);
5627         if (err)
5628                 goto out;
5629
5630         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5631             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5632                 s32 threshold;
5633                 u32 hysteresis;
5634                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5635                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5636                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5637         } else
5638                 err = -EINVAL;
5639
5640 out:
5641         return err;
5642 }
5643
5644 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5645 {
5646         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5647         struct net_device *dev = info->user_ptr[1];
5648         struct mesh_config cfg;
5649         struct mesh_setup setup;
5650         int err;
5651
5652         /* start with default */
5653         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5654         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5655
5656         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5657                 /* and parse parameters if given */
5658                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5659                 if (err)
5660                         return err;
5661         }
5662
5663         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5664             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5665                 return -EINVAL;
5666
5667         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5668         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5669
5670         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5671             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
5672                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5673                         return -EINVAL;
5674
5675         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5676                 /* parse additional setup parameters if given */
5677                 err = nl80211_parse_mesh_setup(info, &setup);
5678                 if (err)
5679                         return err;
5680         }
5681
5682         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5683 }
5684
5685 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5686 {
5687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5688         struct net_device *dev = info->user_ptr[1];
5689
5690         return cfg80211_leave_mesh(rdev, dev);
5691 }
5692
5693 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5694 {
5695         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5696         struct sk_buff *msg;
5697         void *hdr;
5698
5699         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5700                 return -EOPNOTSUPP;
5701
5702         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5703         if (!msg)
5704                 return -ENOMEM;
5705
5706         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5707                              NL80211_CMD_GET_WOWLAN);
5708         if (!hdr)
5709                 goto nla_put_failure;
5710
5711         if (rdev->wowlan) {
5712                 struct nlattr *nl_wowlan;
5713
5714                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5715                 if (!nl_wowlan)
5716                         goto nla_put_failure;
5717
5718                 if (rdev->wowlan->any)
5719                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5720                 if (rdev->wowlan->disconnect)
5721                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5722                 if (rdev->wowlan->magic_pkt)
5723                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5724                 if (rdev->wowlan->gtk_rekey_failure)
5725                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5726                 if (rdev->wowlan->eap_identity_req)
5727                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
5728                 if (rdev->wowlan->four_way_handshake)
5729                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
5730                 if (rdev->wowlan->rfkill_release)
5731                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
5732                 if (rdev->wowlan->n_patterns) {
5733                         struct nlattr *nl_pats, *nl_pat;
5734                         int i, pat_len;
5735
5736                         nl_pats = nla_nest_start(msg,
5737                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5738                         if (!nl_pats)
5739                                 goto nla_put_failure;
5740
5741                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5742                                 nl_pat = nla_nest_start(msg, i + 1);
5743                                 if (!nl_pat)
5744                                         goto nla_put_failure;
5745                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5746                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5747                                         DIV_ROUND_UP(pat_len, 8),
5748                                         rdev->wowlan->patterns[i].mask);
5749                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5750                                         pat_len,
5751                                         rdev->wowlan->patterns[i].pattern);
5752                                 nla_nest_end(msg, nl_pat);
5753                         }
5754                         nla_nest_end(msg, nl_pats);
5755                 }
5756
5757                 nla_nest_end(msg, nl_wowlan);
5758         }
5759
5760         genlmsg_end(msg, hdr);
5761         return genlmsg_reply(msg, info);
5762
5763 nla_put_failure:
5764         nlmsg_free(msg);
5765         return -ENOBUFS;
5766 }
5767
5768 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5769 {
5770         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5771         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5772         struct cfg80211_wowlan no_triggers = {};
5773         struct cfg80211_wowlan new_triggers = {};
5774         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5775         int err, i;
5776
5777         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5778                 return -EOPNOTSUPP;
5779
5780         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5781                 goto no_triggers;
5782
5783         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5784                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5785                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5786                         nl80211_wowlan_policy);
5787         if (err)
5788                 return err;
5789
5790         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
5791                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
5792                         return -EINVAL;
5793                 new_triggers.any = true;
5794         }
5795
5796         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
5797                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
5798                         return -EINVAL;
5799                 new_triggers.disconnect = true;
5800         }
5801
5802         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
5803                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
5804                         return -EINVAL;
5805                 new_triggers.magic_pkt = true;
5806         }
5807
5808         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
5809                 return -EINVAL;
5810
5811         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
5812                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
5813                         return -EINVAL;
5814                 new_triggers.gtk_rekey_failure = true;
5815         }
5816
5817         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
5818                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
5819                         return -EINVAL;
5820                 new_triggers.eap_identity_req = true;
5821         }
5822
5823         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
5824                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
5825                         return -EINVAL;
5826                 new_triggers.four_way_handshake = true;
5827         }
5828
5829         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
5830                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
5831                         return -EINVAL;
5832                 new_triggers.rfkill_release = true;
5833         }
5834
5835         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
5836                 struct nlattr *pat;
5837                 int n_patterns = 0;
5838                 int rem, pat_len, mask_len;
5839                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
5840
5841                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5842                                     rem)
5843                         n_patterns++;
5844                 if (n_patterns > wowlan->n_patterns)
5845                         return -EINVAL;
5846
5847                 new_triggers.patterns = kcalloc(n_patterns,
5848                                                 sizeof(new_triggers.patterns[0]),
5849                                                 GFP_KERNEL);
5850                 if (!new_triggers.patterns)
5851                         return -ENOMEM;
5852
5853                 new_triggers.n_patterns = n_patterns;
5854                 i = 0;
5855
5856                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5857                                     rem) {
5858                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
5859                                   nla_data(pat), nla_len(pat), NULL);
5860                         err = -EINVAL;
5861                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
5862                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
5863                                 goto error;
5864                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
5865                         mask_len = DIV_ROUND_UP(pat_len, 8);
5866                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
5867                             mask_len)
5868                                 goto error;
5869                         if (pat_len > wowlan->pattern_max_len ||
5870                             pat_len < wowlan->pattern_min_len)
5871                                 goto error;
5872
5873                         new_triggers.patterns[i].mask =
5874                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
5875                         if (!new_triggers.patterns[i].mask) {
5876                                 err = -ENOMEM;
5877                                 goto error;
5878                         }
5879                         new_triggers.patterns[i].pattern =
5880                                 new_triggers.patterns[i].mask + mask_len;
5881                         memcpy(new_triggers.patterns[i].mask,
5882                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
5883                                mask_len);
5884                         new_triggers.patterns[i].pattern_len = pat_len;
5885                         memcpy(new_triggers.patterns[i].pattern,
5886                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
5887                                pat_len);
5888                         i++;
5889                 }
5890         }
5891
5892         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
5893                 struct cfg80211_wowlan *ntrig;
5894                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
5895                                 GFP_KERNEL);
5896                 if (!ntrig) {
5897                         err = -ENOMEM;
5898                         goto error;
5899                 }
5900                 cfg80211_rdev_free_wowlan(rdev);
5901                 rdev->wowlan = ntrig;
5902         } else {
5903  no_triggers:
5904                 cfg80211_rdev_free_wowlan(rdev);
5905                 rdev->wowlan = NULL;
5906         }
5907
5908         return 0;
5909  error:
5910         for (i = 0; i < new_triggers.n_patterns; i++)
5911                 kfree(new_triggers.patterns[i].mask);
5912         kfree(new_triggers.patterns);
5913         return err;
5914 }
5915
5916 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
5917 {
5918         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5919         struct net_device *dev = info->user_ptr[1];
5920         struct wireless_dev *wdev = dev->ieee80211_ptr;
5921         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
5922         struct cfg80211_gtk_rekey_data rekey_data;
5923         int err;
5924
5925         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
5926                 return -EINVAL;
5927
5928         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
5929                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
5930                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
5931                         nl80211_rekey_policy);
5932         if (err)
5933                 return err;
5934
5935         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
5936                 return -ERANGE;
5937         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
5938                 return -ERANGE;
5939         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
5940                 return -ERANGE;
5941
5942         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
5943                NL80211_KEK_LEN);
5944         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
5945                NL80211_KCK_LEN);
5946         memcpy(rekey_data.replay_ctr,
5947                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
5948                NL80211_REPLAY_CTR_LEN);
5949
5950         wdev_lock(wdev);
5951         if (!wdev->current_bss) {
5952                 err = -ENOTCONN;
5953                 goto out;
5954         }
5955
5956         if (!rdev->ops->set_rekey_data) {
5957                 err = -EOPNOTSUPP;
5958                 goto out;
5959         }
5960
5961         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
5962  out:
5963         wdev_unlock(wdev);
5964         return err;
5965 }
5966
5967 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
5968                                              struct genl_info *info)
5969 {
5970         struct net_device *dev = info->user_ptr[1];
5971         struct wireless_dev *wdev = dev->ieee80211_ptr;
5972
5973         if (wdev->iftype != NL80211_IFTYPE_AP &&
5974             wdev->iftype != NL80211_IFTYPE_P2P_GO)
5975                 return -EINVAL;
5976
5977         if (wdev->ap_unexpected_nlpid)
5978                 return -EBUSY;
5979
5980         wdev->ap_unexpected_nlpid = info->snd_pid;
5981         return 0;
5982 }
5983
5984 static int nl80211_probe_client(struct sk_buff *skb,
5985                                 struct genl_info *info)
5986 {
5987         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5988         struct net_device *dev = info->user_ptr[1];
5989         struct wireless_dev *wdev = dev->ieee80211_ptr;
5990         struct sk_buff *msg;
5991         void *hdr;
5992         const u8 *addr;
5993         u64 cookie;
5994         int err;
5995
5996         if (wdev->iftype != NL80211_IFTYPE_AP &&
5997             wdev->iftype != NL80211_IFTYPE_P2P_GO)
5998                 return -EOPNOTSUPP;
5999
6000         if (!info->attrs[NL80211_ATTR_MAC])
6001                 return -EINVAL;
6002
6003         if (!rdev->ops->probe_client)
6004                 return -EOPNOTSUPP;
6005
6006         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6007         if (!msg)
6008                 return -ENOMEM;
6009
6010         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6011                              NL80211_CMD_PROBE_CLIENT);
6012
6013         if (IS_ERR(hdr)) {
6014                 err = PTR_ERR(hdr);
6015                 goto free_msg;
6016         }
6017
6018         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6019
6020         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6021         if (err)
6022                 goto free_msg;
6023
6024         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6025
6026         genlmsg_end(msg, hdr);
6027
6028         return genlmsg_reply(msg, info);
6029
6030  nla_put_failure:
6031         err = -ENOBUFS;
6032  free_msg:
6033         nlmsg_free(msg);
6034         return err;
6035 }
6036
6037 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6038 {
6039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6040
6041         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6042                 return -EOPNOTSUPP;
6043
6044         if (rdev->ap_beacons_nlpid)
6045                 return -EBUSY;
6046
6047         rdev->ap_beacons_nlpid = info->snd_pid;
6048
6049         return 0;
6050 }
6051
6052 #define NL80211_FLAG_NEED_WIPHY         0x01
6053 #define NL80211_FLAG_NEED_NETDEV        0x02
6054 #define NL80211_FLAG_NEED_RTNL          0x04
6055 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6056 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6057                                          NL80211_FLAG_CHECK_NETDEV_UP)
6058
6059 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6060                             struct genl_info *info)
6061 {
6062         struct cfg80211_registered_device *rdev;
6063         struct net_device *dev;
6064         int err;
6065         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6066
6067         if (rtnl)
6068                 rtnl_lock();
6069
6070         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6071                 rdev = cfg80211_get_dev_from_info(info);
6072                 if (IS_ERR(rdev)) {
6073                         if (rtnl)
6074                                 rtnl_unlock();
6075                         return PTR_ERR(rdev);
6076                 }
6077                 info->user_ptr[0] = rdev;
6078         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6079                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
6080                 if (err) {
6081                         if (rtnl)
6082                                 rtnl_unlock();
6083                         return err;
6084                 }
6085                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6086                     !netif_running(dev)) {
6087                         cfg80211_unlock_rdev(rdev);
6088                         dev_put(dev);
6089                         if (rtnl)
6090                                 rtnl_unlock();
6091                         return -ENETDOWN;
6092                 }
6093                 info->user_ptr[0] = rdev;
6094                 info->user_ptr[1] = dev;
6095         }
6096
6097         return 0;
6098 }
6099
6100 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6101                               struct genl_info *info)
6102 {
6103         if (info->user_ptr[0])
6104                 cfg80211_unlock_rdev(info->user_ptr[0]);
6105         if (info->user_ptr[1])
6106                 dev_put(info->user_ptr[1]);
6107         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6108                 rtnl_unlock();
6109 }
6110
6111 static struct genl_ops nl80211_ops[] = {
6112         {
6113                 .cmd = NL80211_CMD_GET_WIPHY,
6114                 .doit = nl80211_get_wiphy,
6115                 .dumpit = nl80211_dump_wiphy,
6116                 .policy = nl80211_policy,
6117                 /* can be retrieved by unprivileged users */
6118                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6119         },
6120         {
6121                 .cmd = NL80211_CMD_SET_WIPHY,
6122                 .doit = nl80211_set_wiphy,
6123                 .policy = nl80211_policy,
6124                 .flags = GENL_ADMIN_PERM,
6125                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6126         },
6127         {
6128                 .cmd = NL80211_CMD_GET_INTERFACE,
6129                 .doit = nl80211_get_interface,
6130                 .dumpit = nl80211_dump_interface,
6131                 .policy = nl80211_policy,
6132                 /* can be retrieved by unprivileged users */
6133                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6134         },
6135         {
6136                 .cmd = NL80211_CMD_SET_INTERFACE,
6137                 .doit = nl80211_set_interface,
6138                 .policy = nl80211_policy,
6139                 .flags = GENL_ADMIN_PERM,
6140                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6141                                   NL80211_FLAG_NEED_RTNL,
6142         },
6143         {
6144                 .cmd = NL80211_CMD_NEW_INTERFACE,
6145                 .doit = nl80211_new_interface,
6146                 .policy = nl80211_policy,
6147                 .flags = GENL_ADMIN_PERM,
6148                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6149                                   NL80211_FLAG_NEED_RTNL,
6150         },
6151         {
6152                 .cmd = NL80211_CMD_DEL_INTERFACE,
6153                 .doit = nl80211_del_interface,
6154                 .policy = nl80211_policy,
6155                 .flags = GENL_ADMIN_PERM,
6156                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6157                                   NL80211_FLAG_NEED_RTNL,
6158         },
6159         {
6160                 .cmd = NL80211_CMD_GET_KEY,
6161                 .doit = nl80211_get_key,
6162                 .policy = nl80211_policy,
6163                 .flags = GENL_ADMIN_PERM,
6164                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6165                                   NL80211_FLAG_NEED_RTNL,
6166         },
6167         {
6168                 .cmd = NL80211_CMD_SET_KEY,
6169                 .doit = nl80211_set_key,
6170                 .policy = nl80211_policy,
6171                 .flags = GENL_ADMIN_PERM,
6172                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6173                                   NL80211_FLAG_NEED_RTNL,
6174         },
6175         {
6176                 .cmd = NL80211_CMD_NEW_KEY,
6177                 .doit = nl80211_new_key,
6178                 .policy = nl80211_policy,
6179                 .flags = GENL_ADMIN_PERM,
6180                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6181                                   NL80211_FLAG_NEED_RTNL,
6182         },
6183         {
6184                 .cmd = NL80211_CMD_DEL_KEY,
6185                 .doit = nl80211_del_key,
6186                 .policy = nl80211_policy,
6187                 .flags = GENL_ADMIN_PERM,
6188                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6189                                   NL80211_FLAG_NEED_RTNL,
6190         },
6191         {
6192                 .cmd = NL80211_CMD_SET_BEACON,
6193                 .policy = nl80211_policy,
6194                 .flags = GENL_ADMIN_PERM,
6195                 .doit = nl80211_addset_beacon,
6196                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6197                                   NL80211_FLAG_NEED_RTNL,
6198         },
6199         {
6200                 .cmd = NL80211_CMD_NEW_BEACON,
6201                 .policy = nl80211_policy,
6202                 .flags = GENL_ADMIN_PERM,
6203                 .doit = nl80211_addset_beacon,
6204                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6205                                   NL80211_FLAG_NEED_RTNL,
6206         },
6207         {
6208                 .cmd = NL80211_CMD_DEL_BEACON,
6209                 .policy = nl80211_policy,
6210                 .flags = GENL_ADMIN_PERM,
6211                 .doit = nl80211_del_beacon,
6212                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6213                                   NL80211_FLAG_NEED_RTNL,
6214         },
6215         {
6216                 .cmd = NL80211_CMD_GET_STATION,
6217                 .doit = nl80211_get_station,
6218                 .dumpit = nl80211_dump_station,
6219                 .policy = nl80211_policy,
6220                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6221                                   NL80211_FLAG_NEED_RTNL,
6222         },
6223         {
6224                 .cmd = NL80211_CMD_SET_STATION,
6225                 .doit = nl80211_set_station,
6226                 .policy = nl80211_policy,
6227                 .flags = GENL_ADMIN_PERM,
6228                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6229                                   NL80211_FLAG_NEED_RTNL,
6230         },
6231         {
6232                 .cmd = NL80211_CMD_NEW_STATION,
6233                 .doit = nl80211_new_station,
6234                 .policy = nl80211_policy,
6235                 .flags = GENL_ADMIN_PERM,
6236                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6237                                   NL80211_FLAG_NEED_RTNL,
6238         },
6239         {
6240                 .cmd = NL80211_CMD_DEL_STATION,
6241                 .doit = nl80211_del_station,
6242                 .policy = nl80211_policy,
6243                 .flags = GENL_ADMIN_PERM,
6244                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6245                                   NL80211_FLAG_NEED_RTNL,
6246         },
6247         {
6248                 .cmd = NL80211_CMD_GET_MPATH,
6249                 .doit = nl80211_get_mpath,
6250                 .dumpit = nl80211_dump_mpath,
6251                 .policy = nl80211_policy,
6252                 .flags = GENL_ADMIN_PERM,
6253                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6254                                   NL80211_FLAG_NEED_RTNL,
6255         },
6256         {
6257                 .cmd = NL80211_CMD_SET_MPATH,
6258                 .doit = nl80211_set_mpath,
6259                 .policy = nl80211_policy,
6260                 .flags = GENL_ADMIN_PERM,
6261                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6262                                   NL80211_FLAG_NEED_RTNL,
6263         },
6264         {
6265                 .cmd = NL80211_CMD_NEW_MPATH,
6266                 .doit = nl80211_new_mpath,
6267                 .policy = nl80211_policy,
6268                 .flags = GENL_ADMIN_PERM,
6269                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6270                                   NL80211_FLAG_NEED_RTNL,
6271         },
6272         {
6273                 .cmd = NL80211_CMD_DEL_MPATH,
6274                 .doit = nl80211_del_mpath,
6275                 .policy = nl80211_policy,
6276                 .flags = GENL_ADMIN_PERM,
6277                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6278                                   NL80211_FLAG_NEED_RTNL,
6279         },
6280         {
6281                 .cmd = NL80211_CMD_SET_BSS,
6282                 .doit = nl80211_set_bss,
6283                 .policy = nl80211_policy,
6284                 .flags = GENL_ADMIN_PERM,
6285                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6286                                   NL80211_FLAG_NEED_RTNL,
6287         },
6288         {
6289                 .cmd = NL80211_CMD_GET_REG,
6290                 .doit = nl80211_get_reg,
6291                 .policy = nl80211_policy,
6292                 /* can be retrieved by unprivileged users */
6293         },
6294         {
6295                 .cmd = NL80211_CMD_SET_REG,
6296                 .doit = nl80211_set_reg,
6297                 .policy = nl80211_policy,
6298                 .flags = GENL_ADMIN_PERM,
6299         },
6300         {
6301                 .cmd = NL80211_CMD_REQ_SET_REG,
6302                 .doit = nl80211_req_set_reg,
6303                 .policy = nl80211_policy,
6304                 .flags = GENL_ADMIN_PERM,
6305         },
6306         {
6307                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6308                 .doit = nl80211_get_mesh_config,
6309                 .policy = nl80211_policy,
6310                 /* can be retrieved by unprivileged users */
6311                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6312                                   NL80211_FLAG_NEED_RTNL,
6313         },
6314         {
6315                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6316                 .doit = nl80211_update_mesh_config,
6317                 .policy = nl80211_policy,
6318                 .flags = GENL_ADMIN_PERM,
6319                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6320                                   NL80211_FLAG_NEED_RTNL,
6321         },
6322         {
6323                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6324                 .doit = nl80211_trigger_scan,
6325                 .policy = nl80211_policy,
6326                 .flags = GENL_ADMIN_PERM,
6327                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6328                                   NL80211_FLAG_NEED_RTNL,
6329         },
6330         {
6331                 .cmd = NL80211_CMD_GET_SCAN,
6332                 .policy = nl80211_policy,
6333                 .dumpit = nl80211_dump_scan,
6334         },
6335         {
6336                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6337                 .doit = nl80211_start_sched_scan,
6338                 .policy = nl80211_policy,
6339                 .flags = GENL_ADMIN_PERM,
6340                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6341                                   NL80211_FLAG_NEED_RTNL,
6342         },
6343         {
6344                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6345                 .doit = nl80211_stop_sched_scan,
6346                 .policy = nl80211_policy,
6347                 .flags = GENL_ADMIN_PERM,
6348                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6349                                   NL80211_FLAG_NEED_RTNL,
6350         },
6351         {
6352                 .cmd = NL80211_CMD_AUTHENTICATE,
6353                 .doit = nl80211_authenticate,
6354                 .policy = nl80211_policy,
6355                 .flags = GENL_ADMIN_PERM,
6356                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6357                                   NL80211_FLAG_NEED_RTNL,
6358         },
6359         {
6360                 .cmd = NL80211_CMD_ASSOCIATE,
6361                 .doit = nl80211_associate,
6362                 .policy = nl80211_policy,
6363                 .flags = GENL_ADMIN_PERM,
6364                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6365                                   NL80211_FLAG_NEED_RTNL,
6366         },
6367         {
6368                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6369                 .doit = nl80211_deauthenticate,
6370                 .policy = nl80211_policy,
6371                 .flags = GENL_ADMIN_PERM,
6372                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6373                                   NL80211_FLAG_NEED_RTNL,
6374         },
6375         {
6376                 .cmd = NL80211_CMD_DISASSOCIATE,
6377                 .doit = nl80211_disassociate,
6378                 .policy = nl80211_policy,
6379                 .flags = GENL_ADMIN_PERM,
6380                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6381                                   NL80211_FLAG_NEED_RTNL,
6382         },
6383         {
6384                 .cmd = NL80211_CMD_JOIN_IBSS,
6385                 .doit = nl80211_join_ibss,
6386                 .policy = nl80211_policy,
6387                 .flags = GENL_ADMIN_PERM,
6388                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6389                                   NL80211_FLAG_NEED_RTNL,
6390         },
6391         {
6392                 .cmd = NL80211_CMD_LEAVE_IBSS,
6393                 .doit = nl80211_leave_ibss,
6394                 .policy = nl80211_policy,
6395                 .flags = GENL_ADMIN_PERM,
6396                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6397                                   NL80211_FLAG_NEED_RTNL,
6398         },
6399 #ifdef CONFIG_NL80211_TESTMODE
6400         {
6401                 .cmd = NL80211_CMD_TESTMODE,
6402                 .doit = nl80211_testmode_do,
6403                 .dumpit = nl80211_testmode_dump,
6404                 .policy = nl80211_policy,
6405                 .flags = GENL_ADMIN_PERM,
6406                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6407                                   NL80211_FLAG_NEED_RTNL,
6408         },
6409 #endif
6410         {
6411                 .cmd = NL80211_CMD_CONNECT,
6412                 .doit = nl80211_connect,
6413                 .policy = nl80211_policy,
6414                 .flags = GENL_ADMIN_PERM,
6415                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6416                                   NL80211_FLAG_NEED_RTNL,
6417         },
6418         {
6419                 .cmd = NL80211_CMD_DISCONNECT,
6420                 .doit = nl80211_disconnect,
6421                 .policy = nl80211_policy,
6422                 .flags = GENL_ADMIN_PERM,
6423                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6424                                   NL80211_FLAG_NEED_RTNL,
6425         },
6426         {
6427                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6428                 .doit = nl80211_wiphy_netns,
6429                 .policy = nl80211_policy,
6430                 .flags = GENL_ADMIN_PERM,
6431                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6432                                   NL80211_FLAG_NEED_RTNL,
6433         },
6434         {
6435                 .cmd = NL80211_CMD_GET_SURVEY,
6436                 .policy = nl80211_policy,
6437                 .dumpit = nl80211_dump_survey,
6438         },
6439         {
6440                 .cmd = NL80211_CMD_SET_PMKSA,
6441                 .doit = nl80211_setdel_pmksa,
6442                 .policy = nl80211_policy,
6443                 .flags = GENL_ADMIN_PERM,
6444                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6445                                   NL80211_FLAG_NEED_RTNL,
6446         },
6447         {
6448                 .cmd = NL80211_CMD_DEL_PMKSA,
6449                 .doit = nl80211_setdel_pmksa,
6450                 .policy = nl80211_policy,
6451                 .flags = GENL_ADMIN_PERM,
6452                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6453                                   NL80211_FLAG_NEED_RTNL,
6454         },
6455         {
6456                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6457                 .doit = nl80211_flush_pmksa,
6458                 .policy = nl80211_policy,
6459                 .flags = GENL_ADMIN_PERM,
6460                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6461                                   NL80211_FLAG_NEED_RTNL,
6462         },
6463         {
6464                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6465                 .doit = nl80211_remain_on_channel,
6466                 .policy = nl80211_policy,
6467                 .flags = GENL_ADMIN_PERM,
6468                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6469                                   NL80211_FLAG_NEED_RTNL,
6470         },
6471         {
6472                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6473                 .doit = nl80211_cancel_remain_on_channel,
6474                 .policy = nl80211_policy,
6475                 .flags = GENL_ADMIN_PERM,
6476                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6477                                   NL80211_FLAG_NEED_RTNL,
6478         },
6479         {
6480                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6481                 .doit = nl80211_set_tx_bitrate_mask,
6482                 .policy = nl80211_policy,
6483                 .flags = GENL_ADMIN_PERM,
6484                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6485                                   NL80211_FLAG_NEED_RTNL,
6486         },
6487         {
6488                 .cmd = NL80211_CMD_REGISTER_FRAME,
6489                 .doit = nl80211_register_mgmt,
6490                 .policy = nl80211_policy,
6491                 .flags = GENL_ADMIN_PERM,
6492                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6493                                   NL80211_FLAG_NEED_RTNL,
6494         },
6495         {
6496                 .cmd = NL80211_CMD_FRAME,
6497                 .doit = nl80211_tx_mgmt,
6498                 .policy = nl80211_policy,
6499                 .flags = GENL_ADMIN_PERM,
6500                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6501                                   NL80211_FLAG_NEED_RTNL,
6502         },
6503         {
6504                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6505                 .doit = nl80211_tx_mgmt_cancel_wait,
6506                 .policy = nl80211_policy,
6507                 .flags = GENL_ADMIN_PERM,
6508                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6509                                   NL80211_FLAG_NEED_RTNL,
6510         },
6511         {
6512                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6513                 .doit = nl80211_set_power_save,
6514                 .policy = nl80211_policy,
6515                 .flags = GENL_ADMIN_PERM,
6516                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6517                                   NL80211_FLAG_NEED_RTNL,
6518         },
6519         {
6520                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6521                 .doit = nl80211_get_power_save,
6522                 .policy = nl80211_policy,
6523                 /* can be retrieved by unprivileged users */
6524                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6525                                   NL80211_FLAG_NEED_RTNL,
6526         },
6527         {
6528                 .cmd = NL80211_CMD_SET_CQM,
6529                 .doit = nl80211_set_cqm,
6530                 .policy = nl80211_policy,
6531                 .flags = GENL_ADMIN_PERM,
6532                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6533                                   NL80211_FLAG_NEED_RTNL,
6534         },
6535         {
6536                 .cmd = NL80211_CMD_SET_CHANNEL,
6537                 .doit = nl80211_set_channel,
6538                 .policy = nl80211_policy,
6539                 .flags = GENL_ADMIN_PERM,
6540                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6541                                   NL80211_FLAG_NEED_RTNL,
6542         },
6543         {
6544                 .cmd = NL80211_CMD_SET_WDS_PEER,
6545                 .doit = nl80211_set_wds_peer,
6546                 .policy = nl80211_policy,
6547                 .flags = GENL_ADMIN_PERM,
6548                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6549                                   NL80211_FLAG_NEED_RTNL,
6550         },
6551         {
6552                 .cmd = NL80211_CMD_JOIN_MESH,
6553                 .doit = nl80211_join_mesh,
6554                 .policy = nl80211_policy,
6555                 .flags = GENL_ADMIN_PERM,
6556                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6557                                   NL80211_FLAG_NEED_RTNL,
6558         },
6559         {
6560                 .cmd = NL80211_CMD_LEAVE_MESH,
6561                 .doit = nl80211_leave_mesh,
6562                 .policy = nl80211_policy,
6563                 .flags = GENL_ADMIN_PERM,
6564                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6565                                   NL80211_FLAG_NEED_RTNL,
6566         },
6567         {
6568                 .cmd = NL80211_CMD_GET_WOWLAN,
6569                 .doit = nl80211_get_wowlan,
6570                 .policy = nl80211_policy,
6571                 /* can be retrieved by unprivileged users */
6572                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6573                                   NL80211_FLAG_NEED_RTNL,
6574         },
6575         {
6576                 .cmd = NL80211_CMD_SET_WOWLAN,
6577                 .doit = nl80211_set_wowlan,
6578                 .policy = nl80211_policy,
6579                 .flags = GENL_ADMIN_PERM,
6580                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6581                                   NL80211_FLAG_NEED_RTNL,
6582         },
6583         {
6584                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6585                 .doit = nl80211_set_rekey_data,
6586                 .policy = nl80211_policy,
6587                 .flags = GENL_ADMIN_PERM,
6588                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6589                                   NL80211_FLAG_NEED_RTNL,
6590         },
6591         {
6592                 .cmd = NL80211_CMD_TDLS_MGMT,
6593                 .doit = nl80211_tdls_mgmt,
6594                 .policy = nl80211_policy,
6595                 .flags = GENL_ADMIN_PERM,
6596                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6597                                   NL80211_FLAG_NEED_RTNL,
6598         },
6599         {
6600                 .cmd = NL80211_CMD_TDLS_OPER,
6601                 .doit = nl80211_tdls_oper,
6602                 .policy = nl80211_policy,
6603                 .flags = GENL_ADMIN_PERM,
6604                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6605                                   NL80211_FLAG_NEED_RTNL,
6606         },
6607         {
6608                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6609                 .doit = nl80211_register_unexpected_frame,
6610                 .policy = nl80211_policy,
6611                 .flags = GENL_ADMIN_PERM,
6612                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6613                                   NL80211_FLAG_NEED_RTNL,
6614         },
6615         {
6616                 .cmd = NL80211_CMD_PROBE_CLIENT,
6617                 .doit = nl80211_probe_client,
6618                 .policy = nl80211_policy,
6619                 .flags = GENL_ADMIN_PERM,
6620                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6621                                   NL80211_FLAG_NEED_RTNL,
6622         },
6623         {
6624                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6625                 .doit = nl80211_register_beacons,
6626                 .policy = nl80211_policy,
6627                 .flags = GENL_ADMIN_PERM,
6628                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6629                                   NL80211_FLAG_NEED_RTNL,
6630         },
6631         {
6632                 .cmd = NL80211_CMD_SET_NOACK_MAP,
6633                 .doit = nl80211_set_noack_map,
6634                 .policy = nl80211_policy,
6635                 .flags = GENL_ADMIN_PERM,
6636                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6637                                   NL80211_FLAG_NEED_RTNL,
6638         },
6639
6640 };
6641
6642 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6643         .name = "mlme",
6644 };
6645
6646 /* multicast groups */
6647 static struct genl_multicast_group nl80211_config_mcgrp = {
6648         .name = "config",
6649 };
6650 static struct genl_multicast_group nl80211_scan_mcgrp = {
6651         .name = "scan",
6652 };
6653 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6654         .name = "regulatory",
6655 };
6656
6657 /* notification functions */
6658
6659 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6660 {
6661         struct sk_buff *msg;
6662
6663         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6664         if (!msg)
6665                 return;
6666
6667         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
6668                 nlmsg_free(msg);
6669                 return;
6670         }
6671
6672         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6673                                 nl80211_config_mcgrp.id, GFP_KERNEL);
6674 }
6675
6676 static int nl80211_add_scan_req(struct sk_buff *msg,
6677                                 struct cfg80211_registered_device *rdev)
6678 {
6679         struct cfg80211_scan_request *req = rdev->scan_req;
6680         struct nlattr *nest;
6681         int i;
6682
6683         ASSERT_RDEV_LOCK(rdev);
6684
6685         if (WARN_ON(!req))
6686                 return 0;
6687
6688         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
6689         if (!nest)
6690                 goto nla_put_failure;
6691         for (i = 0; i < req->n_ssids; i++)
6692                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
6693         nla_nest_end(msg, nest);
6694
6695         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
6696         if (!nest)
6697                 goto nla_put_failure;
6698         for (i = 0; i < req->n_channels; i++)
6699                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
6700         nla_nest_end(msg, nest);
6701
6702         if (req->ie)
6703                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
6704
6705         return 0;
6706  nla_put_failure:
6707         return -ENOBUFS;
6708 }
6709
6710 static int nl80211_send_scan_msg(struct sk_buff *msg,
6711                                  struct cfg80211_registered_device *rdev,
6712                                  struct net_device *netdev,
6713                                  u32 pid, u32 seq, int flags,
6714                                  u32 cmd)
6715 {
6716         void *hdr;
6717
6718         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6719         if (!hdr)
6720                 return -1;
6721
6722         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6723         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6724
6725         /* ignore errors and send incomplete event anyway */
6726         nl80211_add_scan_req(msg, rdev);
6727
6728         return genlmsg_end(msg, hdr);
6729
6730  nla_put_failure:
6731         genlmsg_cancel(msg, hdr);
6732         return -EMSGSIZE;
6733 }
6734
6735 static int
6736 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6737                             struct cfg80211_registered_device *rdev,
6738                             struct net_device *netdev,
6739                             u32 pid, u32 seq, int flags, u32 cmd)
6740 {
6741         void *hdr;
6742
6743         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6744         if (!hdr)
6745                 return -1;
6746
6747         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6748         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6749
6750         return genlmsg_end(msg, hdr);
6751
6752  nla_put_failure:
6753         genlmsg_cancel(msg, hdr);
6754         return -EMSGSIZE;
6755 }
6756
6757 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
6758                              struct net_device *netdev)
6759 {
6760         struct sk_buff *msg;
6761
6762         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6763         if (!msg)
6764                 return;
6765
6766         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6767                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
6768                 nlmsg_free(msg);
6769                 return;
6770         }
6771
6772         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6773                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6774 }
6775
6776 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
6777                             struct net_device *netdev)
6778 {
6779         struct sk_buff *msg;
6780
6781         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6782         if (!msg)
6783                 return;
6784
6785         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6786                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
6787                 nlmsg_free(msg);
6788                 return;
6789         }
6790
6791         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6792                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6793 }
6794
6795 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
6796                                struct net_device *netdev)
6797 {
6798         struct sk_buff *msg;
6799
6800         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6801         if (!msg)
6802                 return;
6803
6804         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6805                                   NL80211_CMD_SCAN_ABORTED) < 0) {
6806                 nlmsg_free(msg);
6807                 return;
6808         }
6809
6810         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6811                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6812 }
6813
6814 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
6815                                      struct net_device *netdev)
6816 {
6817         struct sk_buff *msg;
6818
6819         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6820         if (!msg)
6821                 return;
6822
6823         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
6824                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
6825                 nlmsg_free(msg);
6826                 return;
6827         }
6828
6829         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6830                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6831 }
6832
6833 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
6834                              struct net_device *netdev, u32 cmd)
6835 {
6836         struct sk_buff *msg;
6837
6838         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6839         if (!msg)
6840                 return;
6841
6842         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
6843                 nlmsg_free(msg);
6844                 return;
6845         }
6846
6847         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6848                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6849 }
6850
6851 /*
6852  * This can happen on global regulatory changes or device specific settings
6853  * based on custom world regulatory domains.
6854  */
6855 void nl80211_send_reg_change_event(struct regulatory_request *request)
6856 {
6857         struct sk_buff *msg;
6858         void *hdr;
6859
6860         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6861         if (!msg)
6862                 return;
6863
6864         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
6865         if (!hdr) {
6866                 nlmsg_free(msg);
6867                 return;
6868         }
6869
6870         /* Userspace can always count this one always being set */
6871         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
6872
6873         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
6874                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6875                            NL80211_REGDOM_TYPE_WORLD);
6876         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
6877                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6878                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
6879         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
6880                  request->intersect)
6881                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6882                            NL80211_REGDOM_TYPE_INTERSECTION);
6883         else {
6884                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6885                            NL80211_REGDOM_TYPE_COUNTRY);
6886                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
6887         }
6888
6889         if (wiphy_idx_valid(request->wiphy_idx))
6890                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
6891
6892         genlmsg_end(msg, hdr);
6893
6894         rcu_read_lock();
6895         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6896                                 GFP_ATOMIC);
6897         rcu_read_unlock();
6898
6899         return;
6900
6901 nla_put_failure:
6902         genlmsg_cancel(msg, hdr);
6903         nlmsg_free(msg);
6904 }
6905
6906 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
6907                                     struct net_device *netdev,
6908                                     const u8 *buf, size_t len,
6909                                     enum nl80211_commands cmd, gfp_t gfp)
6910 {
6911         struct sk_buff *msg;
6912         void *hdr;
6913
6914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6915         if (!msg)
6916                 return;
6917
6918         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6919         if (!hdr) {
6920                 nlmsg_free(msg);
6921                 return;
6922         }
6923
6924         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6925         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6926         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6927
6928         genlmsg_end(msg, hdr);
6929
6930         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6931                                 nl80211_mlme_mcgrp.id, gfp);
6932         return;
6933
6934  nla_put_failure:
6935         genlmsg_cancel(msg, hdr);
6936         nlmsg_free(msg);
6937 }
6938
6939 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
6940                           struct net_device *netdev, const u8 *buf,
6941                           size_t len, gfp_t gfp)
6942 {
6943         nl80211_send_mlme_event(rdev, netdev, buf, len,
6944                                 NL80211_CMD_AUTHENTICATE, gfp);
6945 }
6946
6947 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
6948                            struct net_device *netdev, const u8 *buf,
6949                            size_t len, gfp_t gfp)
6950 {
6951         nl80211_send_mlme_event(rdev, netdev, buf, len,
6952                                 NL80211_CMD_ASSOCIATE, gfp);
6953 }
6954
6955 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
6956                          struct net_device *netdev, const u8 *buf,
6957                          size_t len, gfp_t gfp)
6958 {
6959         nl80211_send_mlme_event(rdev, netdev, buf, len,
6960                                 NL80211_CMD_DEAUTHENTICATE, gfp);
6961 }
6962
6963 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
6964                            struct net_device *netdev, const u8 *buf,
6965                            size_t len, gfp_t gfp)
6966 {
6967         nl80211_send_mlme_event(rdev, netdev, buf, len,
6968                                 NL80211_CMD_DISASSOCIATE, gfp);
6969 }
6970
6971 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
6972                                 struct net_device *netdev, const u8 *buf,
6973                                 size_t len, gfp_t gfp)
6974 {
6975         nl80211_send_mlme_event(rdev, netdev, buf, len,
6976                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
6977 }
6978
6979 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
6980                                   struct net_device *netdev, const u8 *buf,
6981                                   size_t len, gfp_t gfp)
6982 {
6983         nl80211_send_mlme_event(rdev, netdev, buf, len,
6984                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
6985 }
6986
6987 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
6988                                       struct net_device *netdev, int cmd,
6989                                       const u8 *addr, gfp_t gfp)
6990 {
6991         struct sk_buff *msg;
6992         void *hdr;
6993
6994         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6995         if (!msg)
6996                 return;
6997
6998         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6999         if (!hdr) {
7000                 nlmsg_free(msg);
7001                 return;
7002         }
7003
7004         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7005         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7006         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
7007         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7008
7009         genlmsg_end(msg, hdr);
7010
7011         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7012                                 nl80211_mlme_mcgrp.id, gfp);
7013         return;
7014
7015  nla_put_failure:
7016         genlmsg_cancel(msg, hdr);
7017         nlmsg_free(msg);
7018 }
7019
7020 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7021                                struct net_device *netdev, const u8 *addr,
7022                                gfp_t gfp)
7023 {
7024         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7025                                   addr, gfp);
7026 }
7027
7028 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7029                                 struct net_device *netdev, const u8 *addr,
7030                                 gfp_t gfp)
7031 {
7032         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7033                                   addr, gfp);
7034 }
7035
7036 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7037                                  struct net_device *netdev, const u8 *bssid,
7038                                  const u8 *req_ie, size_t req_ie_len,
7039                                  const u8 *resp_ie, size_t resp_ie_len,
7040                                  u16 status, gfp_t gfp)
7041 {
7042         struct sk_buff *msg;
7043         void *hdr;
7044
7045         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7046         if (!msg)
7047                 return;
7048
7049         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7050         if (!hdr) {
7051                 nlmsg_free(msg);
7052                 return;
7053         }
7054
7055         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7056         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7057         if (bssid)
7058                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7059         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
7060         if (req_ie)
7061                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7062         if (resp_ie)
7063                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7064
7065         genlmsg_end(msg, hdr);
7066
7067         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7068                                 nl80211_mlme_mcgrp.id, gfp);
7069         return;
7070
7071  nla_put_failure:
7072         genlmsg_cancel(msg, hdr);
7073         nlmsg_free(msg);
7074
7075 }
7076
7077 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7078                          struct net_device *netdev, const u8 *bssid,
7079                          const u8 *req_ie, size_t req_ie_len,
7080                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7081 {
7082         struct sk_buff *msg;
7083         void *hdr;
7084
7085         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7086         if (!msg)
7087                 return;
7088
7089         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7090         if (!hdr) {
7091                 nlmsg_free(msg);
7092                 return;
7093         }
7094
7095         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7096         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7097         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7098         if (req_ie)
7099                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7100         if (resp_ie)
7101                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7102
7103         genlmsg_end(msg, hdr);
7104
7105         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7106                                 nl80211_mlme_mcgrp.id, gfp);
7107         return;
7108
7109  nla_put_failure:
7110         genlmsg_cancel(msg, hdr);
7111         nlmsg_free(msg);
7112
7113 }
7114
7115 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7116                                struct net_device *netdev, u16 reason,
7117                                const u8 *ie, size_t ie_len, bool from_ap)
7118 {
7119         struct sk_buff *msg;
7120         void *hdr;
7121
7122         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7123         if (!msg)
7124                 return;
7125
7126         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7127         if (!hdr) {
7128                 nlmsg_free(msg);
7129                 return;
7130         }
7131
7132         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7133         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7134         if (from_ap && reason)
7135                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
7136         if (from_ap)
7137                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
7138         if (ie)
7139                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
7140
7141         genlmsg_end(msg, hdr);
7142
7143         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7144                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7145         return;
7146
7147  nla_put_failure:
7148         genlmsg_cancel(msg, hdr);
7149         nlmsg_free(msg);
7150
7151 }
7152
7153 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7154                              struct net_device *netdev, const u8 *bssid,
7155                              gfp_t gfp)
7156 {
7157         struct sk_buff *msg;
7158         void *hdr;
7159
7160         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7161         if (!msg)
7162                 return;
7163
7164         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7165         if (!hdr) {
7166                 nlmsg_free(msg);
7167                 return;
7168         }
7169
7170         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7171         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7172         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7173
7174         genlmsg_end(msg, hdr);
7175
7176         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7177                                 nl80211_mlme_mcgrp.id, gfp);
7178         return;
7179
7180  nla_put_failure:
7181         genlmsg_cancel(msg, hdr);
7182         nlmsg_free(msg);
7183 }
7184
7185 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7186                 struct net_device *netdev,
7187                 const u8 *macaddr, const u8* ie, u8 ie_len,
7188                 gfp_t gfp)
7189 {
7190         struct sk_buff *msg;
7191         void *hdr;
7192
7193         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7194         if (!msg)
7195                 return;
7196
7197         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7198         if (!hdr) {
7199                 nlmsg_free(msg);
7200                 return;
7201         }
7202
7203         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7204         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7205         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
7206         if (ie_len && ie)
7207                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
7208
7209         genlmsg_end(msg, hdr);
7210
7211         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7212                                 nl80211_mlme_mcgrp.id, gfp);
7213         return;
7214
7215  nla_put_failure:
7216         genlmsg_cancel(msg, hdr);
7217         nlmsg_free(msg);
7218 }
7219
7220 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7221                                  struct net_device *netdev, const u8 *addr,
7222                                  enum nl80211_key_type key_type, int key_id,
7223                                  const u8 *tsc, gfp_t gfp)
7224 {
7225         struct sk_buff *msg;
7226         void *hdr;
7227
7228         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7229         if (!msg)
7230                 return;
7231
7232         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7233         if (!hdr) {
7234                 nlmsg_free(msg);
7235                 return;
7236         }
7237
7238         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7239         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7240         if (addr)
7241                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7242         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
7243         if (key_id != -1)
7244                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
7245         if (tsc)
7246                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
7247
7248         genlmsg_end(msg, hdr);
7249
7250         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7251                                 nl80211_mlme_mcgrp.id, gfp);
7252         return;
7253
7254  nla_put_failure:
7255         genlmsg_cancel(msg, hdr);
7256         nlmsg_free(msg);
7257 }
7258
7259 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7260                                     struct ieee80211_channel *channel_before,
7261                                     struct ieee80211_channel *channel_after)
7262 {
7263         struct sk_buff *msg;
7264         void *hdr;
7265         struct nlattr *nl_freq;
7266
7267         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7268         if (!msg)
7269                 return;
7270
7271         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7272         if (!hdr) {
7273                 nlmsg_free(msg);
7274                 return;
7275         }
7276
7277         /*
7278          * Since we are applying the beacon hint to a wiphy we know its
7279          * wiphy_idx is valid
7280          */
7281         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
7282
7283         /* Before */
7284         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7285         if (!nl_freq)
7286                 goto nla_put_failure;
7287         if (nl80211_msg_put_channel(msg, channel_before))
7288                 goto nla_put_failure;
7289         nla_nest_end(msg, nl_freq);
7290
7291         /* After */
7292         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7293         if (!nl_freq)
7294                 goto nla_put_failure;
7295         if (nl80211_msg_put_channel(msg, channel_after))
7296                 goto nla_put_failure;
7297         nla_nest_end(msg, nl_freq);
7298
7299         genlmsg_end(msg, hdr);
7300
7301         rcu_read_lock();
7302         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7303                                 GFP_ATOMIC);
7304         rcu_read_unlock();
7305
7306         return;
7307
7308 nla_put_failure:
7309         genlmsg_cancel(msg, hdr);
7310         nlmsg_free(msg);
7311 }
7312
7313 static void nl80211_send_remain_on_chan_event(
7314         int cmd, struct cfg80211_registered_device *rdev,
7315         struct net_device *netdev, u64 cookie,
7316         struct ieee80211_channel *chan,
7317         enum nl80211_channel_type channel_type,
7318         unsigned int duration, gfp_t gfp)
7319 {
7320         struct sk_buff *msg;
7321         void *hdr;
7322
7323         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7324         if (!msg)
7325                 return;
7326
7327         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7328         if (!hdr) {
7329                 nlmsg_free(msg);
7330                 return;
7331         }
7332
7333         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7334         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7335         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
7336         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
7337         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7338
7339         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
7340                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
7341
7342         genlmsg_end(msg, hdr);
7343
7344         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7345                                 nl80211_mlme_mcgrp.id, gfp);
7346         return;
7347
7348  nla_put_failure:
7349         genlmsg_cancel(msg, hdr);
7350         nlmsg_free(msg);
7351 }
7352
7353 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7354                                     struct net_device *netdev, u64 cookie,
7355                                     struct ieee80211_channel *chan,
7356                                     enum nl80211_channel_type channel_type,
7357                                     unsigned int duration, gfp_t gfp)
7358 {
7359         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7360                                           rdev, netdev, cookie, chan,
7361                                           channel_type, duration, gfp);
7362 }
7363
7364 void nl80211_send_remain_on_channel_cancel(
7365         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7366         u64 cookie, struct ieee80211_channel *chan,
7367         enum nl80211_channel_type channel_type, gfp_t gfp)
7368 {
7369         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7370                                           rdev, netdev, cookie, chan,
7371                                           channel_type, 0, gfp);
7372 }
7373
7374 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7375                             struct net_device *dev, const u8 *mac_addr,
7376                             struct station_info *sinfo, gfp_t gfp)
7377 {
7378         struct sk_buff *msg;
7379
7380         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7381         if (!msg)
7382                 return;
7383
7384         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
7385                 nlmsg_free(msg);
7386                 return;
7387         }
7388
7389         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7390                                 nl80211_mlme_mcgrp.id, gfp);
7391 }
7392
7393 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7394                                 struct net_device *dev, const u8 *mac_addr,
7395                                 gfp_t gfp)
7396 {
7397         struct sk_buff *msg;
7398         void *hdr;
7399
7400         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7401         if (!msg)
7402                 return;
7403
7404         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7405         if (!hdr) {
7406                 nlmsg_free(msg);
7407                 return;
7408         }
7409
7410         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7411         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
7412
7413         genlmsg_end(msg, hdr);
7414
7415         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7416                                 nl80211_mlme_mcgrp.id, gfp);
7417         return;
7418
7419  nla_put_failure:
7420         genlmsg_cancel(msg, hdr);
7421         nlmsg_free(msg);
7422 }
7423
7424 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7425                                        const u8 *addr, gfp_t gfp)
7426 {
7427         struct wireless_dev *wdev = dev->ieee80211_ptr;
7428         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7429         struct sk_buff *msg;
7430         void *hdr;
7431         int err;
7432         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7433
7434         if (!nlpid)
7435                 return false;
7436
7437         msg = nlmsg_new(100, gfp);
7438         if (!msg)
7439                 return true;
7440
7441         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7442         if (!hdr) {
7443                 nlmsg_free(msg);
7444                 return true;
7445         }
7446
7447         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7448         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7449         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7450
7451         err = genlmsg_end(msg, hdr);
7452         if (err < 0) {
7453                 nlmsg_free(msg);
7454                 return true;
7455         }
7456
7457         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7458         return true;
7459
7460  nla_put_failure:
7461         genlmsg_cancel(msg, hdr);
7462         nlmsg_free(msg);
7463         return true;
7464 }
7465
7466 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7467 {
7468         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7469                                           addr, gfp);
7470 }
7471
7472 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7473                                     const u8 *addr, gfp_t gfp)
7474 {
7475         return __nl80211_unexpected_frame(dev,
7476                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7477                                           addr, gfp);
7478 }
7479
7480 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7481                       struct net_device *netdev, u32 nlpid,
7482                       int freq, const u8 *buf, size_t len, gfp_t gfp)
7483 {
7484         struct sk_buff *msg;
7485         void *hdr;
7486
7487         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7488         if (!msg)
7489                 return -ENOMEM;
7490
7491         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7492         if (!hdr) {
7493                 nlmsg_free(msg);
7494                 return -ENOMEM;
7495         }
7496
7497         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7498         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7499         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7500         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7501
7502         genlmsg_end(msg, hdr);
7503
7504         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7505
7506  nla_put_failure:
7507         genlmsg_cancel(msg, hdr);
7508         nlmsg_free(msg);
7509         return -ENOBUFS;
7510 }
7511
7512 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7513                                  struct net_device *netdev, u64 cookie,
7514                                  const u8 *buf, size_t len, bool ack,
7515                                  gfp_t gfp)
7516 {
7517         struct sk_buff *msg;
7518         void *hdr;
7519
7520         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7521         if (!msg)
7522                 return;
7523
7524         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7525         if (!hdr) {
7526                 nlmsg_free(msg);
7527                 return;
7528         }
7529
7530         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7531         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7532         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7533         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7534         if (ack)
7535                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7536
7537         genlmsg_end(msg, hdr);
7538
7539         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7540         return;
7541
7542  nla_put_failure:
7543         genlmsg_cancel(msg, hdr);
7544         nlmsg_free(msg);
7545 }
7546
7547 void
7548 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7549                              struct net_device *netdev,
7550                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7551                              gfp_t gfp)
7552 {
7553         struct sk_buff *msg;
7554         struct nlattr *pinfoattr;
7555         void *hdr;
7556
7557         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7558         if (!msg)
7559                 return;
7560
7561         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7562         if (!hdr) {
7563                 nlmsg_free(msg);
7564                 return;
7565         }
7566
7567         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7568         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7569
7570         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7571         if (!pinfoattr)
7572                 goto nla_put_failure;
7573
7574         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7575                     rssi_event);
7576
7577         nla_nest_end(msg, pinfoattr);
7578
7579         genlmsg_end(msg, hdr);
7580
7581         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7582                                 nl80211_mlme_mcgrp.id, gfp);
7583         return;
7584
7585  nla_put_failure:
7586         genlmsg_cancel(msg, hdr);
7587         nlmsg_free(msg);
7588 }
7589
7590 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7591                               struct net_device *netdev, const u8 *bssid,
7592                               const u8 *replay_ctr, gfp_t gfp)
7593 {
7594         struct sk_buff *msg;
7595         struct nlattr *rekey_attr;
7596         void *hdr;
7597
7598         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7599         if (!msg)
7600                 return;
7601
7602         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7603         if (!hdr) {
7604                 nlmsg_free(msg);
7605                 return;
7606         }
7607
7608         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7609         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7610         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7611
7612         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7613         if (!rekey_attr)
7614                 goto nla_put_failure;
7615
7616         NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7617                 NL80211_REPLAY_CTR_LEN, replay_ctr);
7618
7619         nla_nest_end(msg, rekey_attr);
7620
7621         genlmsg_end(msg, hdr);
7622
7623         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7624                                 nl80211_mlme_mcgrp.id, gfp);
7625         return;
7626
7627  nla_put_failure:
7628         genlmsg_cancel(msg, hdr);
7629         nlmsg_free(msg);
7630 }
7631
7632 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
7633                                     struct net_device *netdev, int index,
7634                                     const u8 *bssid, bool preauth, gfp_t gfp)
7635 {
7636         struct sk_buff *msg;
7637         struct nlattr *attr;
7638         void *hdr;
7639
7640         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7641         if (!msg)
7642                 return;
7643
7644         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
7645         if (!hdr) {
7646                 nlmsg_free(msg);
7647                 return;
7648         }
7649
7650         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7651         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7652
7653         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
7654         if (!attr)
7655                 goto nla_put_failure;
7656
7657         NLA_PUT_U32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index);
7658         NLA_PUT(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid);
7659         if (preauth)
7660                 NLA_PUT_FLAG(msg, NL80211_PMKSA_CANDIDATE_PREAUTH);
7661
7662         nla_nest_end(msg, attr);
7663
7664         genlmsg_end(msg, hdr);
7665
7666         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7667                                 nl80211_mlme_mcgrp.id, gfp);
7668         return;
7669
7670  nla_put_failure:
7671         genlmsg_cancel(msg, hdr);
7672         nlmsg_free(msg);
7673 }
7674
7675 void
7676 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
7677                                 struct net_device *netdev, const u8 *peer,
7678                                 u32 num_packets, gfp_t gfp)
7679 {
7680         struct sk_buff *msg;
7681         struct nlattr *pinfoattr;
7682         void *hdr;
7683
7684         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7685         if (!msg)
7686                 return;
7687
7688         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7689         if (!hdr) {
7690                 nlmsg_free(msg);
7691                 return;
7692         }
7693
7694         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7695         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7696         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
7697
7698         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7699         if (!pinfoattr)
7700                 goto nla_put_failure;
7701
7702         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
7703
7704         nla_nest_end(msg, pinfoattr);
7705
7706         genlmsg_end(msg, hdr);
7707
7708         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7709                                 nl80211_mlme_mcgrp.id, gfp);
7710         return;
7711
7712  nla_put_failure:
7713         genlmsg_cancel(msg, hdr);
7714         nlmsg_free(msg);
7715 }
7716
7717 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
7718                            u64 cookie, bool acked, gfp_t gfp)
7719 {
7720         struct wireless_dev *wdev = dev->ieee80211_ptr;
7721         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7722         struct sk_buff *msg;
7723         void *hdr;
7724         int err;
7725
7726         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7727         if (!msg)
7728                 return;
7729
7730         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
7731         if (!hdr) {
7732                 nlmsg_free(msg);
7733                 return;
7734         }
7735
7736         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7737         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7738         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7739         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7740         if (acked)
7741                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7742
7743         err = genlmsg_end(msg, hdr);
7744         if (err < 0) {
7745                 nlmsg_free(msg);
7746                 return;
7747         }
7748
7749         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7750                                 nl80211_mlme_mcgrp.id, gfp);
7751         return;
7752
7753  nla_put_failure:
7754         genlmsg_cancel(msg, hdr);
7755         nlmsg_free(msg);
7756 }
7757 EXPORT_SYMBOL(cfg80211_probe_status);
7758
7759 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
7760                                  const u8 *frame, size_t len,
7761                                  int freq, gfp_t gfp)
7762 {
7763         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
7764         struct sk_buff *msg;
7765         void *hdr;
7766         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
7767
7768         if (!nlpid)
7769                 return;
7770
7771         msg = nlmsg_new(len + 100, gfp);
7772         if (!msg)
7773                 return;
7774
7775         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7776         if (!hdr) {
7777                 nlmsg_free(msg);
7778                 return;
7779         }
7780
7781         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7782         if (freq)
7783                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7784         NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
7785
7786         genlmsg_end(msg, hdr);
7787
7788         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7789         return;
7790
7791  nla_put_failure:
7792         genlmsg_cancel(msg, hdr);
7793         nlmsg_free(msg);
7794 }
7795 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
7796
7797 static int nl80211_netlink_notify(struct notifier_block * nb,
7798                                   unsigned long state,
7799                                   void *_notify)
7800 {
7801         struct netlink_notify *notify = _notify;
7802         struct cfg80211_registered_device *rdev;
7803         struct wireless_dev *wdev;
7804
7805         if (state != NETLINK_URELEASE)
7806                 return NOTIFY_DONE;
7807
7808         rcu_read_lock();
7809
7810         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
7811                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
7812                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
7813                 if (rdev->ap_beacons_nlpid == notify->pid)
7814                         rdev->ap_beacons_nlpid = 0;
7815         }
7816
7817         rcu_read_unlock();
7818
7819         return NOTIFY_DONE;
7820 }
7821
7822 static struct notifier_block nl80211_netlink_notifier = {
7823         .notifier_call = nl80211_netlink_notify,
7824 };
7825
7826 /* initialisation/exit functions */
7827
7828 int nl80211_init(void)
7829 {
7830         int err;
7831
7832         err = genl_register_family_with_ops(&nl80211_fam,
7833                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
7834         if (err)
7835                 return err;
7836
7837         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
7838         if (err)
7839                 goto err_out;
7840
7841         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
7842         if (err)
7843                 goto err_out;
7844
7845         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
7846         if (err)
7847                 goto err_out;
7848
7849         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
7850         if (err)
7851                 goto err_out;
7852
7853 #ifdef CONFIG_NL80211_TESTMODE
7854         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
7855         if (err)
7856                 goto err_out;
7857 #endif
7858
7859         err = netlink_register_notifier(&nl80211_netlink_notifier);
7860         if (err)
7861                 goto err_out;
7862
7863         return 0;
7864  err_out:
7865         genl_unregister_family(&nl80211_fam);
7866         return err;
7867 }
7868
7869 void nl80211_exit(void)
7870 {
7871         netlink_unregister_notifier(&nl80211_netlink_notifier);
7872         genl_unregister_family(&nl80211_fam);
7873 }