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_ifindex(struct net *netns, struct nlattr **attrs,
  51                                    struct cfg80211_registered_device **rdev,
  52                                    struct net_device **dev)
  53 {
  54         int ifindex;
  55
  56         if (!attrs[NL80211_ATTR_IFINDEX])
  57                 return -EINVAL;
  58
  59         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  60         *dev = dev_get_by_index(netns, ifindex);
  61         if (!*dev)
  62                 return -ENODEV;
  63
  64         *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  65         if (IS_ERR(*rdev)) {
  66                 dev_put(*dev);
  67                 return PTR_ERR(*rdev);
  68         }
  69
  70         return 0;
  71 }
  72
  73 static struct cfg80211_registered_device *
  74 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
  75 {
  76         struct cfg80211_registered_device *rdev = NULL, *tmp;
  77         struct net_device *netdev;
  78
  79         assert_cfg80211_lock();
  80
  81         if (!attrs[NL80211_ATTR_WIPHY] &&
  82             !attrs[NL80211_ATTR_IFINDEX])
  83                 return ERR_PTR(-EINVAL);
  84
  85         if (attrs[NL80211_ATTR_WIPHY])
  86                 rdev = cfg80211_rdev_by_wiphy_idx(
  87                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
  88
  89         if (attrs[NL80211_ATTR_IFINDEX]) {
  90                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  91                 netdev = dev_get_by_index(netns, ifindex);
  92                 if (netdev) {
  93                         if (netdev->ieee80211_ptr)
  94                                 tmp = wiphy_to_dev(
  95                                                 netdev->ieee80211_ptr->wiphy);
  96                         else
  97                                 tmp = NULL;
  98
  99                         dev_put(netdev);
 100
 101                         /* not wireless device -- return error */
 102                         if (!tmp)
 103                                 return ERR_PTR(-EINVAL);
 104
 105                         /* mismatch -- return error */
 106                         if (rdev && tmp != rdev)
 107                                 return ERR_PTR(-EINVAL);
 108
 109                         rdev = tmp;
 110                 }
 111         }
 112
 113         if (!rdev)
 114                 return ERR_PTR(-ENODEV);
 115
 116         if (netns != wiphy_net(&rdev->wiphy))
 117                 return ERR_PTR(-ENODEV);
 118
 119         return rdev;
 120 }
 121
 122 /*
 123  * This function returns a pointer to the driver
 124  * that the genl_info item that is passed refers to.
 125  * If successful, it returns non-NULL and also locks
 126  * the driver's mutex!
 127  *
 128  * This means that you need to call cfg80211_unlock_rdev()
 129  * before being allowed to acquire &cfg80211_mutex!
 130  *
 131  * This is necessary because we need to lock the global
 132  * mutex to get an item off the list safely, and then
 133  * we lock the rdev mutex so it doesn't go away under us.
 134  *
 135  * We don't want to keep cfg80211_mutex locked
 136  * for all the time in order to allow requests on
 137  * other interfaces to go through at the same time.
 138  *
 139  * The result of this can be a PTR_ERR and hence must
 140  * be checked with IS_ERR() for errors.
 141  */
 142 static struct cfg80211_registered_device *
 143 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 144 {
 145         struct cfg80211_registered_device *rdev;
 146
 147         mutex_lock(&cfg80211_mutex);
 148         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 149
 150         /* if it is not an error we grab the lock on
 151          * it to assure it won't be going away while
 152          * we operate on it */
 153         if (!IS_ERR(rdev))
 154                 mutex_lock(&rdev->mtx);
 155
 156         mutex_unlock(&cfg80211_mutex);
 157
 158         return rdev;
 159 }
 160
 161 /* policy for the attributes */
 162 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 163         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 164         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 165                                       .len = 20-1 },
 166         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 167         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 170         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 171         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 172         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 174
 175         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 176         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 178
 179         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 180         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 181
 182         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 183         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 184                                     .len = WLAN_MAX_KEY_LEN },
 185         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 186         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 187         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 188         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 189         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 190
 191         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 192         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 193         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 194                                        .len = IEEE80211_MAX_DATA_LEN },
 195         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 196                                        .len = IEEE80211_MAX_DATA_LEN },
 197         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 198         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 199         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 200         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 201                                                .len = NL80211_MAX_SUPP_RATES },
 202         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 203         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 204         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 205         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 206                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 207         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 208
 209         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 210         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 211
 212         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 213         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 214         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 215         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 216                                            .len = NL80211_MAX_SUPP_RATES },
 217         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 218
 219         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 220         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 221
 222         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 223
 224         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 225         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 226                               .len = IEEE80211_MAX_DATA_LEN },
 227         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 228         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 229
 230         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 231                                 .len = IEEE80211_MAX_SSID_LEN },
 232         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 234         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 235         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 236         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 237         [NL80211_ATTR_STA_FLAGS2] = {
 238                 .len = sizeof(struct nl80211_sta_flag_update),
 239         },
 240         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 241         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 242         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 243         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 244         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 245         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 246         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 247         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 248         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 249                                  .len = WLAN_PMKID_LEN },
 250         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 251         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 252         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 253         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 254                                  .len = IEEE80211_MAX_DATA_LEN },
 255         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 256         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 257         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 258         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 259         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 261         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 262         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 263         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 264         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 265         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 266         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 267         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 268         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 269         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 270         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 271         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 272         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 273         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 274         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 275                                          .len = IEEE80211_MAX_DATA_LEN },
 276         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 277                                          .len = IEEE80211_MAX_DATA_LEN },
 278         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 280         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 281         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 282         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 283         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 284         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 285         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 286         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 287         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 288                                       .len = IEEE80211_MAX_DATA_LEN },
 289         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 290         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 291         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 292                 .len = NL80211_HT_CAPABILITY_LEN
 293         },
 294         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 295         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 296         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 297 };
 298
 299 /* policy for the key attributes */
 300 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 301         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 302         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 303         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 304         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 305         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 306         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 307         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 308         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 309 };
 310
 311 /* policy for the key default flags */
 312 static const struct nla_policy
 313 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 314         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 315         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 316 };
 317
 318 /* policy for WoWLAN attributes */
 319 static const struct nla_policy
 320 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 321         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 322         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 323         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 324         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 325         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 326         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 327         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 328         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 329 };
 330
 331 /* policy for GTK rekey offload attributes */
 332 static const struct nla_policy
 333 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 334         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 335         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 336         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 337 };
 338
 339 static const struct nla_policy
 340 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 341         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 342                                                  .len = IEEE80211_MAX_SSID_LEN },
 343 };
 344
 345 /* ifidx get helper */
 346 static int nl80211_get_ifidx(struct netlink_callback *cb)
 347 {
 348         int res;
 349
 350         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 351                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 352                           nl80211_policy);
 353         if (res)
 354                 return res;
 355
 356         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 357                 return -EINVAL;
 358
 359         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 360         if (!res)
 361                 return -EINVAL;
 362         return res;
 363 }
 364
 365 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 366                                        struct netlink_callback *cb,
 367                                        struct cfg80211_registered_device **rdev,
 368                                        struct net_device **dev)
 369 {
 370         int ifidx = cb->args[0];
 371         int err;
 372
 373         if (!ifidx)
 374                 ifidx = nl80211_get_ifidx(cb);
 375         if (ifidx < 0)
 376                 return ifidx;
 377
 378         cb->args[0] = ifidx;
 379
 380         rtnl_lock();
 381
 382         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 383         if (!*dev) {
 384                 err = -ENODEV;
 385                 goto out_rtnl;
 386         }
 387
 388         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 389         if (IS_ERR(*rdev)) {
 390                 err = PTR_ERR(*rdev);
 391                 goto out_rtnl;
 392         }
 393
 394         return 0;
 395  out_rtnl:
 396         rtnl_unlock();
 397         return err;
 398 }
 399
 400 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 401 {
 402         cfg80211_unlock_rdev(rdev);
 403         rtnl_unlock();
 404 }
 405
 406 /* IE validation */
 407 static bool is_valid_ie_attr(const struct nlattr *attr)
 408 {
 409         const u8 *pos;
 410         int len;
 411
 412         if (!attr)
 413                 return true;
 414
 415         pos = nla_data(attr);
 416         len = nla_len(attr);
 417
 418         while (len) {
 419                 u8 elemlen;
 420
 421                 if (len < 2)
 422                         return false;
 423                 len -= 2;
 424
 425                 elemlen = pos[1];
 426                 if (elemlen > len)
 427                         return false;
 428
 429                 len -= elemlen;
 430                 pos += 2 + elemlen;
 431         }
 432
 433         return true;
 434 }
 435
 436 /* message building helper */
 437 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 438                                    int flags, u8 cmd)
 439 {
 440         /* since there is no private header just add the generic one */
 441         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 442 }
 443
 444 static int nl80211_msg_put_channel(struct sk_buff *msg,
 445                                    struct ieee80211_channel *chan)
 446 {
 447         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 448                         chan->center_freq))
 449                 goto nla_put_failure;
 450
 451         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 452             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 453                 goto nla_put_failure;
 454         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 455             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 456                 goto nla_put_failure;
 457         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 458             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 459                 goto nla_put_failure;
 460         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 461             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 462                 goto nla_put_failure;
 463
 464         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 465                         DBM_TO_MBM(chan->max_power)))
 466                 goto nla_put_failure;
 467
 468         return 0;
 469
 470  nla_put_failure:
 471         return -ENOBUFS;
 472 }
 473
 474 /* netlink command implementations */
 475
 476 struct key_parse {
 477         struct key_params p;
 478         int idx;
 479         int type;
 480         bool def, defmgmt;
 481         bool def_uni, def_multi;
 482 };
 483
 484 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 485 {
 486         struct nlattr *tb[NL80211_KEY_MAX + 1];
 487         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 488                                    nl80211_key_policy);
 489         if (err)
 490                 return err;
 491
 492         k->def = !!tb[NL80211_KEY_DEFAULT];
 493         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 494
 495         if (k->def) {
 496                 k->def_uni = true;
 497                 k->def_multi = true;
 498         }
 499         if (k->defmgmt)
 500                 k->def_multi = true;
 501
 502         if (tb[NL80211_KEY_IDX])
 503                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 504
 505         if (tb[NL80211_KEY_DATA]) {
 506                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 507                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 508         }
 509
 510         if (tb[NL80211_KEY_SEQ]) {
 511                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 512                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 513         }
 514
 515         if (tb[NL80211_KEY_CIPHER])
 516                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 517
 518         if (tb[NL80211_KEY_TYPE]) {
 519                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 520                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 521                         return -EINVAL;
 522         }
 523
 524         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 525                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 526                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 527                                        tb[NL80211_KEY_DEFAULT_TYPES],
 528                                        nl80211_key_default_policy);
 529                 if (err)
 530                         return err;
 531
 532                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 533                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 540 {
 541         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 542                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 543                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 544         }
 545
 546         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 547                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 548                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 549         }
 550
 551         if (info->attrs[NL80211_ATTR_KEY_IDX])
 552                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 553
 554         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 555                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 556
 557         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 558         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 559
 560         if (k->def) {
 561                 k->def_uni = true;
 562                 k->def_multi = true;
 563         }
 564         if (k->defmgmt)
 565                 k->def_multi = true;
 566
 567         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 568                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 569                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 570                         return -EINVAL;
 571         }
 572
 573         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 574                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 575                 int err = nla_parse_nested(
 576                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 577                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 578                                 nl80211_key_default_policy);
 579                 if (err)
 580                         return err;
 581
 582                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 583                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 584         }
 585
 586         return 0;
 587 }
 588
 589 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 590 {
 591         int err;
 592
 593         memset(k, 0, sizeof(*k));
 594         k->idx = -1;
 595         k->type = -1;
 596
 597         if (info->attrs[NL80211_ATTR_KEY])
 598                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 599         else
 600                 err = nl80211_parse_key_old(info, k);
 601
 602         if (err)
 603                 return err;
 604
 605         if (k->def && k->defmgmt)
 606                 return -EINVAL;
 607
 608         if (k->defmgmt) {
 609                 if (k->def_uni || !k->def_multi)
 610                         return -EINVAL;
 611         }
 612
 613         if (k->idx != -1) {
 614                 if (k->defmgmt) {
 615                         if (k->idx < 4 || k->idx > 5)
 616                                 return -EINVAL;
 617                 } else if (k->def) {
 618                         if (k->idx < 0 || k->idx > 3)
 619                                 return -EINVAL;
 620                 } else {
 621                         if (k->idx < 0 || k->idx > 5)
 622                                 return -EINVAL;
 623                 }
 624         }
 625
 626         return 0;
 627 }
 628
 629 static struct cfg80211_cached_keys *
 630 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 631                        struct nlattr *keys)
 632 {
 633         struct key_parse parse;
 634         struct nlattr *key;
 635         struct cfg80211_cached_keys *result;
 636         int rem, err, def = 0;
 637
 638         result = kzalloc(sizeof(*result), GFP_KERNEL);
 639         if (!result)
 640                 return ERR_PTR(-ENOMEM);
 641
 642         result->def = -1;
 643         result->defmgmt = -1;
 644
 645         nla_for_each_nested(key, keys, rem) {
 646                 memset(&parse, 0, sizeof(parse));
 647                 parse.idx = -1;
 648
 649                 err = nl80211_parse_key_new(key, &parse);
 650                 if (err)
 651                         goto error;
 652                 err = -EINVAL;
 653                 if (!parse.p.key)
 654                         goto error;
 655                 if (parse.idx < 0 || parse.idx > 4)
 656                         goto error;
 657                 if (parse.def) {
 658                         if (def)
 659                                 goto error;
 660                         def = 1;
 661                         result->def = parse.idx;
 662                         if (!parse.def_uni || !parse.def_multi)
 663                                 goto error;
 664                 } else if (parse.defmgmt)
 665                         goto error;
 666                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 667                                                      parse.idx, false, NULL);
 668                 if (err)
 669                         goto error;
 670                 result->params[parse.idx].cipher = parse.p.cipher;
 671                 result->params[parse.idx].key_len = parse.p.key_len;
 672                 result->params[parse.idx].key = result->data[parse.idx];
 673                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 674         }
 675
 676         return result;
 677  error:
 678         kfree(result);
 679         return ERR_PTR(err);
 680 }
 681
 682 static int nl80211_key_allowed(struct wireless_dev *wdev)
 683 {
 684         ASSERT_WDEV_LOCK(wdev);
 685
 686         switch (wdev->iftype) {
 687         case NL80211_IFTYPE_AP:
 688         case NL80211_IFTYPE_AP_VLAN:
 689         case NL80211_IFTYPE_P2P_GO:
 690         case NL80211_IFTYPE_MESH_POINT:
 691                 break;
 692         case NL80211_IFTYPE_ADHOC:
 693                 if (!wdev->current_bss)
 694                         return -ENOLINK;
 695                 break;
 696         case NL80211_IFTYPE_STATION:
 697         case NL80211_IFTYPE_P2P_CLIENT:
 698                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 699                         return -ENOLINK;
 700                 break;
 701         default:
 702                 return -EINVAL;
 703         }
 704
 705         return 0;
 706 }
 707
 708 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 709 {
 710         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 711         int i;
 712
 713         if (!nl_modes)
 714                 goto nla_put_failure;
 715
 716         i = 0;
 717         while (ifmodes) {
 718                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 719                         goto nla_put_failure;
 720                 ifmodes >>= 1;
 721                 i++;
 722         }
 723
 724         nla_nest_end(msg, nl_modes);
 725         return 0;
 726
 727 nla_put_failure:
 728         return -ENOBUFS;
 729 }
 730
 731 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 732                                           struct sk_buff *msg)
 733 {
 734         struct nlattr *nl_combis;
 735         int i, j;
 736
 737         nl_combis = nla_nest_start(msg,
 738                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 739         if (!nl_combis)
 740                 goto nla_put_failure;
 741
 742         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 743                 const struct ieee80211_iface_combination *c;
 744                 struct nlattr *nl_combi, *nl_limits;
 745
 746                 c = &wiphy->iface_combinations[i];
 747
 748                 nl_combi = nla_nest_start(msg, i + 1);
 749                 if (!nl_combi)
 750                         goto nla_put_failure;
 751
 752                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 753                 if (!nl_limits)
 754                         goto nla_put_failure;
 755
 756                 for (j = 0; j < c->n_limits; j++) {
 757                         struct nlattr *nl_limit;
 758
 759                         nl_limit = nla_nest_start(msg, j + 1);
 760                         if (!nl_limit)
 761                                 goto nla_put_failure;
 762                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 763                                         c->limits[j].max))
 764                                 goto nla_put_failure;
 765                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 766                                                 c->limits[j].types))
 767                                 goto nla_put_failure;
 768                         nla_nest_end(msg, nl_limit);
 769                 }
 770
 771                 nla_nest_end(msg, nl_limits);
 772
 773                 if (c->beacon_int_infra_match &&
 774                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 775                         goto nla_put_failure;
 776                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 777                                 c->num_different_channels) ||
 778                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 779                                 c->max_interfaces))
 780                         goto nla_put_failure;
 781
 782                 nla_nest_end(msg, nl_combi);
 783         }
 784
 785         nla_nest_end(msg, nl_combis);
 786
 787         return 0;
 788 nla_put_failure:
 789         return -ENOBUFS;
 790 }
 791
 792 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 793                               struct cfg80211_registered_device *dev)
 794 {
 795         void *hdr;
 796         struct nlattr *nl_bands, *nl_band;
 797         struct nlattr *nl_freqs, *nl_freq;
 798         struct nlattr *nl_rates, *nl_rate;
 799         struct nlattr *nl_cmds;
 800         enum ieee80211_band band;
 801         struct ieee80211_channel *chan;
 802         struct ieee80211_rate *rate;
 803         int i;
 804         const struct ieee80211_txrx_stypes *mgmt_stypes =
 805                                 dev->wiphy.mgmt_stypes;
 806
 807         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 808         if (!hdr)
 809                 return -1;
 810
 811         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 812             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 813             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 814                         cfg80211_rdev_list_generation) ||
 815             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 816                        dev->wiphy.retry_short) ||
 817             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 818                        dev->wiphy.retry_long) ||
 819             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 820                         dev->wiphy.frag_threshold) ||
 821             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 822                         dev->wiphy.rts_threshold) ||
 823             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 824                        dev->wiphy.coverage_class) ||
 825             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 826                        dev->wiphy.max_scan_ssids) ||
 827             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 828                        dev->wiphy.max_sched_scan_ssids) ||
 829             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 830                         dev->wiphy.max_scan_ie_len) ||
 831             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 832                         dev->wiphy.max_sched_scan_ie_len) ||
 833             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 834                        dev->wiphy.max_match_sets))
 835                 goto nla_put_failure;
 836
 837         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 838             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 839                 goto nla_put_failure;
 840         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 841             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 842                 goto nla_put_failure;
 843         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 844             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 845                 goto nla_put_failure;
 846         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 847             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 848                 goto nla_put_failure;
 849         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 850             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 851                 goto nla_put_failure;
 852         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 853             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 854                 goto nla_put_failure;
 855
 856         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 857                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 858                     dev->wiphy.cipher_suites))
 859                 goto nla_put_failure;
 860
 861         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 862                        dev->wiphy.max_num_pmkids))
 863                 goto nla_put_failure;
 864
 865         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 866             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 867                 goto nla_put_failure;
 868
 869         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 870                         dev->wiphy.available_antennas_tx) ||
 871             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 872                         dev->wiphy.available_antennas_rx))
 873                 goto nla_put_failure;
 874
 875         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 876             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 877                         dev->wiphy.probe_resp_offload))
 878                 goto nla_put_failure;
 879
 880         if ((dev->wiphy.available_antennas_tx ||
 881              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 882                 u32 tx_ant = 0, rx_ant = 0;
 883                 int res;
 884                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 885                 if (!res) {
 886                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 887                                         tx_ant) ||
 888                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 889                                         rx_ant))
 890                                 goto nla_put_failure;
 891                 }
 892         }
 893
 894         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 895                                 dev->wiphy.interface_modes))
 896                 goto nla_put_failure;
 897
 898         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 899         if (!nl_bands)
 900                 goto nla_put_failure;
 901
 902         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 903                 if (!dev->wiphy.bands[band])
 904                         continue;
 905
 906                 nl_band = nla_nest_start(msg, band);
 907                 if (!nl_band)
 908                         goto nla_put_failure;
 909
 910                 /* add HT info */
 911                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 912                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 913                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 914                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 915                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 916                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 917                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 918                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 919                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 920                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 921                         goto nla_put_failure;
 922
 923                 /* add frequencies */
 924                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 925                 if (!nl_freqs)
 926                         goto nla_put_failure;
 927
 928                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 929                         nl_freq = nla_nest_start(msg, i);
 930                         if (!nl_freq)
 931                                 goto nla_put_failure;
 932
 933                         chan = &dev->wiphy.bands[band]->channels[i];
 934
 935                         if (nl80211_msg_put_channel(msg, chan))
 936                                 goto nla_put_failure;
 937
 938                         nla_nest_end(msg, nl_freq);
 939                 }
 940
 941                 nla_nest_end(msg, nl_freqs);
 942
 943                 /* add bitrates */
 944                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 945                 if (!nl_rates)
 946                         goto nla_put_failure;
 947
 948                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 949                         nl_rate = nla_nest_start(msg, i);
 950                         if (!nl_rate)
 951                                 goto nla_put_failure;
 952
 953                         rate = &dev->wiphy.bands[band]->bitrates[i];
 954                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 955                                         rate->bitrate))
 956                                 goto nla_put_failure;
 957                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 958                             nla_put_flag(msg,
 959                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 960                                 goto nla_put_failure;
 961
 962                         nla_nest_end(msg, nl_rate);
 963                 }
 964
 965                 nla_nest_end(msg, nl_rates);
 966
 967                 nla_nest_end(msg, nl_band);
 968         }
 969         nla_nest_end(msg, nl_bands);
 970
 971         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 972         if (!nl_cmds)
 973                 goto nla_put_failure;
 974
 975         i = 0;
 976 #define CMD(op, n)                                              \
 977          do {                                                   \
 978                 if (dev->ops->op) {                             \
 979                         i++;                                    \
 980                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 981                                 goto nla_put_failure;           \
 982                 }                                               \
 983         } while (0)
 984
 985         CMD(add_virtual_intf, NEW_INTERFACE);
 986         CMD(change_virtual_intf, SET_INTERFACE);
 987         CMD(add_key, NEW_KEY);
 988         CMD(start_ap, START_AP);
 989         CMD(add_station, NEW_STATION);
 990         CMD(add_mpath, NEW_MPATH);
 991         CMD(update_mesh_config, SET_MESH_CONFIG);
 992         CMD(change_bss, SET_BSS);
 993         CMD(auth, AUTHENTICATE);
 994         CMD(assoc, ASSOCIATE);
 995         CMD(deauth, DEAUTHENTICATE);
 996         CMD(disassoc, DISASSOCIATE);
 997         CMD(join_ibss, JOIN_IBSS);
 998         CMD(join_mesh, JOIN_MESH);
 999         CMD(set_pmksa, SET_PMKSA);
1000         CMD(del_pmksa, DEL_PMKSA);
1001         CMD(flush_pmksa, FLUSH_PMKSA);
1002         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1003                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1004         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1005         CMD(mgmt_tx, FRAME);
1006         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1007         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1008                 i++;
1009                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1010                         goto nla_put_failure;
1011         }
1012         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1013             dev->ops->join_mesh) {
1014                 i++;
1015                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1016                         goto nla_put_failure;
1017         }
1018         CMD(set_wds_peer, SET_WDS_PEER);
1019         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1020                 CMD(tdls_mgmt, TDLS_MGMT);
1021                 CMD(tdls_oper, TDLS_OPER);
1022         }
1023         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1024                 CMD(sched_scan_start, START_SCHED_SCAN);
1025         CMD(probe_client, PROBE_CLIENT);
1026         CMD(set_noack_map, SET_NOACK_MAP);
1027         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1028                 i++;
1029                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1030                         goto nla_put_failure;
1031         }
1032
1033 #ifdef CONFIG_NL80211_TESTMODE
1034         CMD(testmode_cmd, TESTMODE);
1035 #endif
1036
1037 #undef CMD
1038
1039         if (dev->ops->connect || dev->ops->auth) {
1040                 i++;
1041                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1042                         goto nla_put_failure;
1043         }
1044
1045         if (dev->ops->disconnect || dev->ops->deauth) {
1046                 i++;
1047                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1048                         goto nla_put_failure;
1049         }
1050
1051         nla_nest_end(msg, nl_cmds);
1052
1053         if (dev->ops->remain_on_channel &&
1054             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1055             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1056                         dev->wiphy.max_remain_on_channel_duration))
1057                 goto nla_put_failure;
1058
1059         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1060             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1061                 goto nla_put_failure;
1062
1063         if (mgmt_stypes) {
1064                 u16 stypes;
1065                 struct nlattr *nl_ftypes, *nl_ifs;
1066                 enum nl80211_iftype ift;
1067
1068                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1069                 if (!nl_ifs)
1070                         goto nla_put_failure;
1071
1072                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1073                         nl_ftypes = nla_nest_start(msg, ift);
1074                         if (!nl_ftypes)
1075                                 goto nla_put_failure;
1076                         i = 0;
1077                         stypes = mgmt_stypes[ift].tx;
1078                         while (stypes) {
1079                                 if ((stypes & 1) &&
1080                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1081                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1082                                         goto nla_put_failure;
1083                                 stypes >>= 1;
1084                                 i++;
1085                         }
1086                         nla_nest_end(msg, nl_ftypes);
1087                 }
1088
1089                 nla_nest_end(msg, nl_ifs);
1090
1091                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1092                 if (!nl_ifs)
1093                         goto nla_put_failure;
1094
1095                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1096                         nl_ftypes = nla_nest_start(msg, ift);
1097                         if (!nl_ftypes)
1098                                 goto nla_put_failure;
1099                         i = 0;
1100                         stypes = mgmt_stypes[ift].rx;
1101                         while (stypes) {
1102                                 if ((stypes & 1) &&
1103                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1104                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1105                                         goto nla_put_failure;
1106                                 stypes >>= 1;
1107                                 i++;
1108                         }
1109                         nla_nest_end(msg, nl_ftypes);
1110                 }
1111                 nla_nest_end(msg, nl_ifs);
1112         }
1113
1114         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1115                 struct nlattr *nl_wowlan;
1116
1117                 nl_wowlan = nla_nest_start(msg,
1118                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1119                 if (!nl_wowlan)
1120                         goto nla_put_failure;
1121
1122                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1123                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1124                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1125                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1126                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1127                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1128                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1129                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1130                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1131                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1132                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1133                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1134                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1135                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1136                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1137                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1138                     goto nla_put_failure;
1139                 if (dev->wiphy.wowlan.n_patterns) {
1140                         struct nl80211_wowlan_pattern_support pat = {
1141                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1142                                 .min_pattern_len =
1143                                         dev->wiphy.wowlan.pattern_min_len,
1144                                 .max_pattern_len =
1145                                         dev->wiphy.wowlan.pattern_max_len,
1146                         };
1147                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1148                                     sizeof(pat), &pat))
1149                                 goto nla_put_failure;
1150                 }
1151
1152                 nla_nest_end(msg, nl_wowlan);
1153         }
1154
1155         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1156                                 dev->wiphy.software_iftypes))
1157                 goto nla_put_failure;
1158
1159         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1160                 goto nla_put_failure;
1161
1162         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1163             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1164                         dev->wiphy.ap_sme_capa))
1165                 goto nla_put_failure;
1166
1167         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1168                         dev->wiphy.features))
1169                 goto nla_put_failure;
1170
1171         if (dev->wiphy.ht_capa_mod_mask &&
1172             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1173                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1174                     dev->wiphy.ht_capa_mod_mask))
1175                 goto nla_put_failure;
1176
1177         return genlmsg_end(msg, hdr);
1178
1179  nla_put_failure:
1180         genlmsg_cancel(msg, hdr);
1181         return -EMSGSIZE;
1182 }
1183
1184 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1185 {
1186         int idx = 0;
1187         int start = cb->args[0];
1188         struct cfg80211_registered_device *dev;
1189
1190         mutex_lock(&cfg80211_mutex);
1191         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1192                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1193                         continue;
1194                 if (++idx <= start)
1195                         continue;
1196                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1197                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1198                                        dev) < 0) {
1199                         idx--;
1200                         break;
1201                 }
1202         }
1203         mutex_unlock(&cfg80211_mutex);
1204
1205         cb->args[0] = idx;
1206
1207         return skb->len;
1208 }
1209
1210 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1211 {
1212         struct sk_buff *msg;
1213         struct cfg80211_registered_device *dev = info->user_ptr[0];
1214
1215         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1216         if (!msg)
1217                 return -ENOMEM;
1218
1219         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1220                 nlmsg_free(msg);
1221                 return -ENOBUFS;
1222         }
1223
1224         return genlmsg_reply(msg, info);
1225 }
1226
1227 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1228         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1229         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1230         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1231         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1232         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1233 };
1234
1235 static int parse_txq_params(struct nlattr *tb[],
1236                             struct ieee80211_txq_params *txq_params)
1237 {
1238         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1239             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1240             !tb[NL80211_TXQ_ATTR_AIFS])
1241                 return -EINVAL;
1242
1243         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1244         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1245         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1246         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1247         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1248
1249         if (txq_params->ac >= NL80211_NUM_ACS)
1250                 return -EINVAL;
1251
1252         return 0;
1253 }
1254
1255 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1256 {
1257         /*
1258          * You can only set the channel explicitly for WDS interfaces,
1259          * all others have their channel managed via their respective
1260          * "establish a connection" command (connect, join, ...)
1261          *
1262          * For AP/GO and mesh mode, the channel can be set with the
1263          * channel userspace API, but is only stored and passed to the
1264          * low-level driver when the AP starts or the mesh is joined.
1265          * This is for backward compatibility, userspace can also give
1266          * the channel in the start-ap or join-mesh commands instead.
1267          *
1268          * Monitors are special as they are normally slaved to
1269          * whatever else is going on, so they have their own special
1270          * operation to set the monitor channel if possible.
1271          */
1272         return !wdev ||
1273                 wdev->iftype == NL80211_IFTYPE_AP ||
1274                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1275                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1276                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1277 }
1278
1279 static bool nl80211_valid_channel_type(struct genl_info *info,
1280                                        enum nl80211_channel_type *channel_type)
1281 {
1282         enum nl80211_channel_type tmp;
1283
1284         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1285                 return false;
1286
1287         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1288         if (tmp != NL80211_CHAN_NO_HT &&
1289             tmp != NL80211_CHAN_HT20 &&
1290             tmp != NL80211_CHAN_HT40PLUS &&
1291             tmp != NL80211_CHAN_HT40MINUS)
1292                 return false;
1293
1294         if (channel_type)
1295                 *channel_type = tmp;
1296
1297         return true;
1298 }
1299
1300 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1301                                  struct wireless_dev *wdev,
1302                                  struct genl_info *info)
1303 {
1304         struct ieee80211_channel *channel;
1305         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1306         u32 freq;
1307         int result;
1308         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1309
1310         if (wdev)
1311                 iftype = wdev->iftype;
1312
1313         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1314                 return -EINVAL;
1315
1316         if (!nl80211_can_set_dev_channel(wdev))
1317                 return -EOPNOTSUPP;
1318
1319         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1320             !nl80211_valid_channel_type(info, &channel_type))
1321                 return -EINVAL;
1322
1323         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1324
1325         mutex_lock(&rdev->devlist_mtx);
1326         switch (iftype) {
1327         case NL80211_IFTYPE_AP:
1328         case NL80211_IFTYPE_P2P_GO:
1329                 if (wdev->beacon_interval) {
1330                         result = -EBUSY;
1331                         break;
1332                 }
1333                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1334                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1335                                                               channel,
1336                                                               channel_type)) {
1337                         result = -EINVAL;
1338                         break;
1339                 }
1340                 wdev->preset_chan = channel;
1341                 wdev->preset_chantype = channel_type;
1342                 result = 0;
1343                 break;
1344         case NL80211_IFTYPE_MESH_POINT:
1345                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1346                 break;
1347         case NL80211_IFTYPE_MONITOR:
1348                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1349                 break;
1350         default:
1351                 result = -EINVAL;
1352         }
1353         mutex_unlock(&rdev->devlist_mtx);
1354
1355         return result;
1356 }
1357
1358 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1359 {
1360         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1361         struct net_device *netdev = info->user_ptr[1];
1362
1363         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1364 }
1365
1366 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1367 {
1368         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1369         struct net_device *dev = info->user_ptr[1];
1370         struct wireless_dev *wdev = dev->ieee80211_ptr;
1371         const u8 *bssid;
1372
1373         if (!info->attrs[NL80211_ATTR_MAC])
1374                 return -EINVAL;
1375
1376         if (netif_running(dev))
1377                 return -EBUSY;
1378
1379         if (!rdev->ops->set_wds_peer)
1380                 return -EOPNOTSUPP;
1381
1382         if (wdev->iftype != NL80211_IFTYPE_WDS)
1383                 return -EOPNOTSUPP;
1384
1385         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1386         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1387 }
1388
1389
1390 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1391 {
1392         struct cfg80211_registered_device *rdev;
1393         struct net_device *netdev = NULL;
1394         struct wireless_dev *wdev;
1395         int result = 0, rem_txq_params = 0;
1396         struct nlattr *nl_txq_params;
1397         u32 changed;
1398         u8 retry_short = 0, retry_long = 0;
1399         u32 frag_threshold = 0, rts_threshold = 0;
1400         u8 coverage_class = 0;
1401
1402         /*
1403          * Try to find the wiphy and netdev. Normally this
1404          * function shouldn't need the netdev, but this is
1405          * done for backward compatibility -- previously
1406          * setting the channel was done per wiphy, but now
1407          * it is per netdev. Previous userland like hostapd
1408          * also passed a netdev to set_wiphy, so that it is
1409          * possible to let that go to the right netdev!
1410          */
1411         mutex_lock(&cfg80211_mutex);
1412
1413         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1414                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1415
1416                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1417                 if (netdev && netdev->ieee80211_ptr) {
1418                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1419                         mutex_lock(&rdev->mtx);
1420                 } else
1421                         netdev = NULL;
1422         }
1423
1424         if (!netdev) {
1425                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1426                                                   info->attrs);
1427                 if (IS_ERR(rdev)) {
1428                         mutex_unlock(&cfg80211_mutex);
1429                         return PTR_ERR(rdev);
1430                 }
1431                 wdev = NULL;
1432                 netdev = NULL;
1433                 result = 0;
1434
1435                 mutex_lock(&rdev->mtx);
1436         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1437                 wdev = netdev->ieee80211_ptr;
1438         else
1439                 wdev = NULL;
1440
1441         /*
1442          * end workaround code, by now the rdev is available
1443          * and locked, and wdev may or may not be NULL.
1444          */
1445
1446         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1447                 result = cfg80211_dev_rename(
1448                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1449
1450         mutex_unlock(&cfg80211_mutex);
1451
1452         if (result)
1453                 goto bad_res;
1454
1455         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1456                 struct ieee80211_txq_params txq_params;
1457                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1458
1459                 if (!rdev->ops->set_txq_params) {
1460                         result = -EOPNOTSUPP;
1461                         goto bad_res;
1462                 }
1463
1464                 if (!netdev) {
1465                         result = -EINVAL;
1466                         goto bad_res;
1467                 }
1468
1469                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1470                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1471                         result = -EINVAL;
1472                         goto bad_res;
1473                 }
1474
1475                 if (!netif_running(netdev)) {
1476                         result = -ENETDOWN;
1477                         goto bad_res;
1478                 }
1479
1480                 nla_for_each_nested(nl_txq_params,
1481                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1482                                     rem_txq_params) {
1483                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1484                                   nla_data(nl_txq_params),
1485                                   nla_len(nl_txq_params),
1486                                   txq_params_policy);
1487                         result = parse_txq_params(tb, &txq_params);
1488                         if (result)
1489                                 goto bad_res;
1490
1491                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1492                                                            netdev,
1493                                                            &txq_params);
1494                         if (result)
1495                                 goto bad_res;
1496                 }
1497         }
1498
1499         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1500                 result = __nl80211_set_channel(rdev, wdev, info);
1501                 if (result)
1502                         goto bad_res;
1503         }
1504
1505         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1506                 enum nl80211_tx_power_setting type;
1507                 int idx, mbm = 0;
1508
1509                 if (!rdev->ops->set_tx_power) {
1510                         result = -EOPNOTSUPP;
1511                         goto bad_res;
1512                 }
1513
1514                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1515                 type = nla_get_u32(info->attrs[idx]);
1516
1517                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1518                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1519                         result = -EINVAL;
1520                         goto bad_res;
1521                 }
1522
1523                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1524                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1525                         mbm = nla_get_u32(info->attrs[idx]);
1526                 }
1527
1528                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1529                 if (result)
1530                         goto bad_res;
1531         }
1532
1533         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1534             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1535                 u32 tx_ant, rx_ant;
1536                 if ((!rdev->wiphy.available_antennas_tx &&
1537                      !rdev->wiphy.available_antennas_rx) ||
1538                     !rdev->ops->set_antenna) {
1539                         result = -EOPNOTSUPP;
1540                         goto bad_res;
1541                 }
1542
1543                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1544                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1545
1546                 /* reject antenna configurations which don't match the
1547                  * available antenna masks, except for the "all" mask */
1548                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1549                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1550                         result = -EINVAL;
1551                         goto bad_res;
1552                 }
1553
1554                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1555                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1556
1557                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1558                 if (result)
1559                         goto bad_res;
1560         }
1561
1562         changed = 0;
1563
1564         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1565                 retry_short = nla_get_u8(
1566                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1567                 if (retry_short == 0) {
1568                         result = -EINVAL;
1569                         goto bad_res;
1570                 }
1571                 changed |= WIPHY_PARAM_RETRY_SHORT;
1572         }
1573
1574         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1575                 retry_long = nla_get_u8(
1576                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1577                 if (retry_long == 0) {
1578                         result = -EINVAL;
1579                         goto bad_res;
1580                 }
1581                 changed |= WIPHY_PARAM_RETRY_LONG;
1582         }
1583
1584         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1585                 frag_threshold = nla_get_u32(
1586                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1587                 if (frag_threshold < 256) {
1588                         result = -EINVAL;
1589                         goto bad_res;
1590                 }
1591                 if (frag_threshold != (u32) -1) {
1592                         /*
1593                          * Fragments (apart from the last one) are required to
1594                          * have even length. Make the fragmentation code
1595                          * simpler by stripping LSB should someone try to use
1596                          * odd threshold value.
1597                          */
1598                         frag_threshold &= ~0x1;
1599                 }
1600                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1601         }
1602
1603         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1604                 rts_threshold = nla_get_u32(
1605                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1606                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1607         }
1608
1609         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1610                 coverage_class = nla_get_u8(
1611                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1612                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1613         }
1614
1615         if (changed) {
1616                 u8 old_retry_short, old_retry_long;
1617                 u32 old_frag_threshold, old_rts_threshold;
1618                 u8 old_coverage_class;
1619
1620                 if (!rdev->ops->set_wiphy_params) {
1621                         result = -EOPNOTSUPP;
1622                         goto bad_res;
1623                 }
1624
1625                 old_retry_short = rdev->wiphy.retry_short;
1626                 old_retry_long = rdev->wiphy.retry_long;
1627                 old_frag_threshold = rdev->wiphy.frag_threshold;
1628                 old_rts_threshold = rdev->wiphy.rts_threshold;
1629                 old_coverage_class = rdev->wiphy.coverage_class;
1630
1631                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1632                         rdev->wiphy.retry_short = retry_short;
1633                 if (changed & WIPHY_PARAM_RETRY_LONG)
1634                         rdev->wiphy.retry_long = retry_long;
1635                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1636                         rdev->wiphy.frag_threshold = frag_threshold;
1637                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1638                         rdev->wiphy.rts_threshold = rts_threshold;
1639                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1640                         rdev->wiphy.coverage_class = coverage_class;
1641
1642                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1643                 if (result) {
1644                         rdev->wiphy.retry_short = old_retry_short;
1645                         rdev->wiphy.retry_long = old_retry_long;
1646                         rdev->wiphy.frag_threshold = old_frag_threshold;
1647                         rdev->wiphy.rts_threshold = old_rts_threshold;
1648                         rdev->wiphy.coverage_class = old_coverage_class;
1649                 }
1650         }
1651
1652  bad_res:
1653         mutex_unlock(&rdev->mtx);
1654         if (netdev)
1655                 dev_put(netdev);
1656         return result;
1657 }
1658
1659
1660 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1661                               struct cfg80211_registered_device *rdev,
1662                               struct net_device *dev)
1663 {
1664         void *hdr;
1665
1666         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1667         if (!hdr)
1668                 return -1;
1669
1670         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1671             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1672             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1673             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1674                         dev->ieee80211_ptr->iftype) ||
1675             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1676                         rdev->devlist_generation ^
1677                         (cfg80211_rdev_list_generation << 2)))
1678                 goto nla_put_failure;
1679
1680         if (rdev->ops->get_channel) {
1681                 struct ieee80211_channel *chan;
1682                 enum nl80211_channel_type channel_type;
1683
1684                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1685                 if (chan &&
1686                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1687                                     chan->center_freq) ||
1688                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1689                                     channel_type)))
1690                         goto nla_put_failure;
1691         }
1692
1693         return genlmsg_end(msg, hdr);
1694
1695  nla_put_failure:
1696         genlmsg_cancel(msg, hdr);
1697         return -EMSGSIZE;
1698 }
1699
1700 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1701 {
1702         int wp_idx = 0;
1703         int if_idx = 0;
1704         int wp_start = cb->args[0];
1705         int if_start = cb->args[1];
1706         struct cfg80211_registered_device *rdev;
1707         struct wireless_dev *wdev;
1708
1709         mutex_lock(&cfg80211_mutex);
1710         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1711                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1712                         continue;
1713                 if (wp_idx < wp_start) {
1714                         wp_idx++;
1715                         continue;
1716                 }
1717                 if_idx = 0;
1718
1719                 mutex_lock(&rdev->devlist_mtx);
1720                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1721                         if (if_idx < if_start) {
1722                                 if_idx++;
1723                                 continue;
1724                         }
1725                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1726                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1727                                                rdev, wdev->netdev) < 0) {
1728                                 mutex_unlock(&rdev->devlist_mtx);
1729                                 goto out;
1730                         }
1731                         if_idx++;
1732                 }
1733                 mutex_unlock(&rdev->devlist_mtx);
1734
1735                 wp_idx++;
1736         }
1737  out:
1738         mutex_unlock(&cfg80211_mutex);
1739
1740         cb->args[0] = wp_idx;
1741         cb->args[1] = if_idx;
1742
1743         return skb->len;
1744 }
1745
1746 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1747 {
1748         struct sk_buff *msg;
1749         struct cfg80211_registered_device *dev = info->user_ptr[0];
1750         struct net_device *netdev = info->user_ptr[1];
1751
1752         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1753         if (!msg)
1754                 return -ENOMEM;
1755
1756         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1757                                dev, netdev) < 0) {
1758                 nlmsg_free(msg);
1759                 return -ENOBUFS;
1760         }
1761
1762         return genlmsg_reply(msg, info);
1763 }
1764
1765 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1766         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1767         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1768         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1769         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1770         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1771 };
1772
1773 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1774 {
1775         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1776         int flag;
1777
1778         *mntrflags = 0;
1779
1780         if (!nla)
1781                 return -EINVAL;
1782
1783         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1784                              nla, mntr_flags_policy))
1785                 return -EINVAL;
1786
1787         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1788                 if (flags[flag])
1789                         *mntrflags |= (1<<flag);
1790
1791         return 0;
1792 }
1793
1794 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1795                                struct net_device *netdev, u8 use_4addr,
1796                                enum nl80211_iftype iftype)
1797 {
1798         if (!use_4addr) {
1799                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1800                         return -EBUSY;
1801                 return 0;
1802         }
1803
1804         switch (iftype) {
1805         case NL80211_IFTYPE_AP_VLAN:
1806                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1807                         return 0;
1808                 break;
1809         case NL80211_IFTYPE_STATION:
1810                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1811                         return 0;
1812                 break;
1813         default:
1814                 break;
1815         }
1816
1817         return -EOPNOTSUPP;
1818 }
1819
1820 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1821 {
1822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1823         struct vif_params params;
1824         int err;
1825         enum nl80211_iftype otype, ntype;
1826         struct net_device *dev = info->user_ptr[1];
1827         u32 _flags, *flags = NULL;
1828         bool change = false;
1829
1830         memset(&params, 0, sizeof(params));
1831
1832         otype = ntype = dev->ieee80211_ptr->iftype;
1833
1834         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1835                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1836                 if (otype != ntype)
1837                         change = true;
1838                 if (ntype > NL80211_IFTYPE_MAX)
1839                         return -EINVAL;
1840         }
1841
1842         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1843                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1844
1845                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1846                         return -EINVAL;
1847                 if (netif_running(dev))
1848                         return -EBUSY;
1849
1850                 wdev_lock(wdev);
1851                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1852                              IEEE80211_MAX_MESH_ID_LEN);
1853                 wdev->mesh_id_up_len =
1854                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1855                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1856                        wdev->mesh_id_up_len);
1857                 wdev_unlock(wdev);
1858         }
1859
1860         if (info->attrs[NL80211_ATTR_4ADDR]) {
1861                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1862                 change = true;
1863                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1864                 if (err)
1865                         return err;
1866         } else {
1867                 params.use_4addr = -1;
1868         }
1869
1870         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1871                 if (ntype != NL80211_IFTYPE_MONITOR)
1872                         return -EINVAL;
1873                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1874                                           &_flags);
1875                 if (err)
1876                         return err;
1877
1878                 flags = &_flags;
1879                 change = true;
1880         }
1881
1882         if (change)
1883                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1884         else
1885                 err = 0;
1886
1887         if (!err && params.use_4addr != -1)
1888                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1889
1890         return err;
1891 }
1892
1893 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1894 {
1895         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1896         struct vif_params params;
1897         struct net_device *dev;
1898         int err;
1899         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1900         u32 flags;
1901
1902         memset(&params, 0, sizeof(params));
1903
1904         if (!info->attrs[NL80211_ATTR_IFNAME])
1905                 return -EINVAL;
1906
1907         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1908                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1909                 if (type > NL80211_IFTYPE_MAX)
1910                         return -EINVAL;
1911         }
1912
1913         if (!rdev->ops->add_virtual_intf ||
1914             !(rdev->wiphy.interface_modes & (1 << type)))
1915                 return -EOPNOTSUPP;
1916
1917         if (info->attrs[NL80211_ATTR_4ADDR]) {
1918                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1919                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1920                 if (err)
1921                         return err;
1922         }
1923
1924         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1925                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1926                                   &flags);
1927         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1928                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1929                 type, err ? NULL : &flags, &params);
1930         if (IS_ERR(dev))
1931                 return PTR_ERR(dev);
1932
1933         if (type == NL80211_IFTYPE_MESH_POINT &&
1934             info->attrs[NL80211_ATTR_MESH_ID]) {
1935                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1936
1937                 wdev_lock(wdev);
1938                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1939                              IEEE80211_MAX_MESH_ID_LEN);
1940                 wdev->mesh_id_up_len =
1941                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1942                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1943                        wdev->mesh_id_up_len);
1944                 wdev_unlock(wdev);
1945         }
1946
1947         return 0;
1948 }
1949
1950 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1951 {
1952         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1953         struct net_device *dev = info->user_ptr[1];
1954
1955         if (!rdev->ops->del_virtual_intf)
1956                 return -EOPNOTSUPP;
1957
1958         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1959 }
1960
1961 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1962 {
1963         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1964         struct net_device *dev = info->user_ptr[1];
1965         u16 noack_map;
1966
1967         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1968                 return -EINVAL;
1969
1970         if (!rdev->ops->set_noack_map)
1971                 return -EOPNOTSUPP;
1972
1973         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1974
1975         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1976 }
1977
1978 struct get_key_cookie {
1979         struct sk_buff *msg;
1980         int error;
1981         int idx;
1982 };
1983
1984 static void get_key_callback(void *c, struct key_params *params)
1985 {
1986         struct nlattr *key;
1987         struct get_key_cookie *cookie = c;
1988
1989         if ((params->key &&
1990              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1991                      params->key_len, params->key)) ||
1992             (params->seq &&
1993              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1994                      params->seq_len, params->seq)) ||
1995             (params->cipher &&
1996              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1997                          params->cipher)))
1998                 goto nla_put_failure;
1999
2000         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2001         if (!key)
2002                 goto nla_put_failure;
2003
2004         if ((params->key &&
2005              nla_put(cookie->msg, NL80211_KEY_DATA,
2006                      params->key_len, params->key)) ||
2007             (params->seq &&
2008              nla_put(cookie->msg, NL80211_KEY_SEQ,
2009                      params->seq_len, params->seq)) ||
2010             (params->cipher &&
2011              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2012                          params->cipher)))
2013                 goto nla_put_failure;
2014
2015         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2016                 goto nla_put_failure;
2017
2018         nla_nest_end(cookie->msg, key);
2019
2020         return;
2021  nla_put_failure:
2022         cookie->error = 1;
2023 }
2024
2025 static int nl80211_get_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 key_idx = 0;
2031         const u8 *mac_addr = NULL;
2032         bool pairwise;
2033         struct get_key_cookie cookie = {
2034                 .error = 0,
2035         };
2036         void *hdr;
2037         struct sk_buff *msg;
2038
2039         if (info->attrs[NL80211_ATTR_KEY_IDX])
2040                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2041
2042         if (key_idx > 5)
2043                 return -EINVAL;
2044
2045         if (info->attrs[NL80211_ATTR_MAC])
2046                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2047
2048         pairwise = !!mac_addr;
2049         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2050                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2051                 if (kt >= NUM_NL80211_KEYTYPES)
2052                         return -EINVAL;
2053                 if (kt != NL80211_KEYTYPE_GROUP &&
2054                     kt != NL80211_KEYTYPE_PAIRWISE)
2055                         return -EINVAL;
2056                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2057         }
2058
2059         if (!rdev->ops->get_key)
2060                 return -EOPNOTSUPP;
2061
2062         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2063         if (!msg)
2064                 return -ENOMEM;
2065
2066         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2067                              NL80211_CMD_NEW_KEY);
2068         if (IS_ERR(hdr))
2069                 return PTR_ERR(hdr);
2070
2071         cookie.msg = msg;
2072         cookie.idx = key_idx;
2073
2074         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2075             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2076                 goto nla_put_failure;
2077         if (mac_addr &&
2078             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2079                 goto nla_put_failure;
2080
2081         if (pairwise && mac_addr &&
2082             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2083                 return -ENOENT;
2084
2085         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2086                                  mac_addr, &cookie, get_key_callback);
2087
2088         if (err)
2089                 goto free_msg;
2090
2091         if (cookie.error)
2092                 goto nla_put_failure;
2093
2094         genlmsg_end(msg, hdr);
2095         return genlmsg_reply(msg, info);
2096
2097  nla_put_failure:
2098         err = -ENOBUFS;
2099  free_msg:
2100         nlmsg_free(msg);
2101         return err;
2102 }
2103
2104 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2105 {
2106         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2107         struct key_parse key;
2108         int err;
2109         struct net_device *dev = info->user_ptr[1];
2110
2111         err = nl80211_parse_key(info, &key);
2112         if (err)
2113                 return err;
2114
2115         if (key.idx < 0)
2116                 return -EINVAL;
2117
2118         /* only support setting default key */
2119         if (!key.def && !key.defmgmt)
2120                 return -EINVAL;
2121
2122         wdev_lock(dev->ieee80211_ptr);
2123
2124         if (key.def) {
2125                 if (!rdev->ops->set_default_key) {
2126                         err = -EOPNOTSUPP;
2127                         goto out;
2128                 }
2129
2130                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2131                 if (err)
2132                         goto out;
2133
2134                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2135                                                  key.def_uni, key.def_multi);
2136
2137                 if (err)
2138                         goto out;
2139
2140 #ifdef CONFIG_CFG80211_WEXT
2141                 dev->ieee80211_ptr->wext.default_key = key.idx;
2142 #endif
2143         } else {
2144                 if (key.def_uni || !key.def_multi) {
2145                         err = -EINVAL;
2146                         goto out;
2147                 }
2148
2149                 if (!rdev->ops->set_default_mgmt_key) {
2150                         err = -EOPNOTSUPP;
2151                         goto out;
2152                 }
2153
2154                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2155                 if (err)
2156                         goto out;
2157
2158                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2159                                                       dev, key.idx);
2160                 if (err)
2161                         goto out;
2162
2163 #ifdef CONFIG_CFG80211_WEXT
2164                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2165 #endif
2166         }
2167
2168  out:
2169         wdev_unlock(dev->ieee80211_ptr);
2170
2171         return err;
2172 }
2173
2174 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2175 {
2176         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2177         int err;
2178         struct net_device *dev = info->user_ptr[1];
2179         struct key_parse key;
2180         const u8 *mac_addr = NULL;
2181
2182         err = nl80211_parse_key(info, &key);
2183         if (err)
2184                 return err;
2185
2186         if (!key.p.key)
2187                 return -EINVAL;
2188
2189         if (info->attrs[NL80211_ATTR_MAC])
2190                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2191
2192         if (key.type == -1) {
2193                 if (mac_addr)
2194                         key.type = NL80211_KEYTYPE_PAIRWISE;
2195                 else
2196                         key.type = NL80211_KEYTYPE_GROUP;
2197         }
2198
2199         /* for now */
2200         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2201             key.type != NL80211_KEYTYPE_GROUP)
2202                 return -EINVAL;
2203
2204         if (!rdev->ops->add_key)
2205                 return -EOPNOTSUPP;
2206
2207         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2208                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2209                                            mac_addr))
2210                 return -EINVAL;
2211
2212         wdev_lock(dev->ieee80211_ptr);
2213         err = nl80211_key_allowed(dev->ieee80211_ptr);
2214         if (!err)
2215                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2216                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2217                                          mac_addr, &key.p);
2218         wdev_unlock(dev->ieee80211_ptr);
2219
2220         return err;
2221 }
2222
2223 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2224 {
2225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2226         int err;
2227         struct net_device *dev = info->user_ptr[1];
2228         u8 *mac_addr = NULL;
2229         struct key_parse key;
2230
2231         err = nl80211_parse_key(info, &key);
2232         if (err)
2233                 return err;
2234
2235         if (info->attrs[NL80211_ATTR_MAC])
2236                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2237
2238         if (key.type == -1) {
2239                 if (mac_addr)
2240                         key.type = NL80211_KEYTYPE_PAIRWISE;
2241                 else
2242                         key.type = NL80211_KEYTYPE_GROUP;
2243         }
2244
2245         /* for now */
2246         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2247             key.type != NL80211_KEYTYPE_GROUP)
2248                 return -EINVAL;
2249
2250         if (!rdev->ops->del_key)
2251                 return -EOPNOTSUPP;
2252
2253         wdev_lock(dev->ieee80211_ptr);
2254         err = nl80211_key_allowed(dev->ieee80211_ptr);
2255
2256         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2257             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2258                 err = -ENOENT;
2259
2260         if (!err)
2261                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2262                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2263                                          mac_addr);
2264
2265 #ifdef CONFIG_CFG80211_WEXT
2266         if (!err) {
2267                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2268                         dev->ieee80211_ptr->wext.default_key = -1;
2269                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2270                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2271         }
2272 #endif
2273         wdev_unlock(dev->ieee80211_ptr);
2274
2275         return err;
2276 }
2277
2278 static int nl80211_parse_beacon(struct genl_info *info,
2279                                 struct cfg80211_beacon_data *bcn)
2280 {
2281         bool haveinfo = false;
2282
2283         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2284             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2285             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2286             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2287                 return -EINVAL;
2288
2289         memset(bcn, 0, sizeof(*bcn));
2290
2291         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2292                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2293                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2294                 if (!bcn->head_len)
2295                         return -EINVAL;
2296                 haveinfo = true;
2297         }
2298
2299         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2300                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2301                 bcn->tail_len =
2302                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2303                 haveinfo = true;
2304         }
2305
2306         if (!haveinfo)
2307                 return -EINVAL;
2308
2309         if (info->attrs[NL80211_ATTR_IE]) {
2310                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2311                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2312         }
2313
2314         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2315                 bcn->proberesp_ies =
2316                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2317                 bcn->proberesp_ies_len =
2318                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2319         }
2320
2321         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2322                 bcn->assocresp_ies =
2323                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2324                 bcn->assocresp_ies_len =
2325                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2326         }
2327
2328         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2329                 bcn->probe_resp =
2330                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2331                 bcn->probe_resp_len =
2332                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2333         }
2334
2335         return 0;
2336 }
2337
2338 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2339 {
2340         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2341         struct net_device *dev = info->user_ptr[1];
2342         struct wireless_dev *wdev = dev->ieee80211_ptr;
2343         struct cfg80211_ap_settings params;
2344         int err;
2345
2346         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2347             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2348                 return -EOPNOTSUPP;
2349
2350         if (!rdev->ops->start_ap)
2351                 return -EOPNOTSUPP;
2352
2353         if (wdev->beacon_interval)
2354                 return -EALREADY;
2355
2356         memset(&params, 0, sizeof(params));
2357
2358         /* these are required for START_AP */
2359         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2360             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2361             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2362                 return -EINVAL;
2363
2364         err = nl80211_parse_beacon(info, &params.beacon);
2365         if (err)
2366                 return err;
2367
2368         params.beacon_interval =
2369                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2370         params.dtim_period =
2371                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2372
2373         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2374         if (err)
2375                 return err;
2376
2377         /*
2378          * In theory, some of these attributes should be required here
2379          * but since they were not used when the command was originally
2380          * added, keep them optional for old user space programs to let
2381          * them continue to work with drivers that do not need the
2382          * additional information -- drivers must check!
2383          */
2384         if (info->attrs[NL80211_ATTR_SSID]) {
2385                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2386                 params.ssid_len =
2387                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2388                 if (params.ssid_len == 0 ||
2389                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2390                         return -EINVAL;
2391         }
2392
2393         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2394                 params.hidden_ssid = nla_get_u32(
2395                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2396                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2397                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2398                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2399                         return -EINVAL;
2400         }
2401
2402         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2403
2404         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2405                 params.auth_type = nla_get_u32(
2406                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2407                 if (!nl80211_valid_auth_type(params.auth_type))
2408                         return -EINVAL;
2409         } else
2410                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2411
2412         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2413                                       NL80211_MAX_NR_CIPHER_SUITES);
2414         if (err)
2415                 return err;
2416
2417         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2418                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2419                         return -EOPNOTSUPP;
2420                 params.inactivity_timeout = nla_get_u16(
2421                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2422         }
2423
2424         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2425                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2426
2427                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2428                     !nl80211_valid_channel_type(info, &channel_type))
2429                         return -EINVAL;
2430
2431                 params.channel = rdev_freq_to_chan(rdev,
2432                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2433                         channel_type);
2434                 if (!params.channel)
2435                         return -EINVAL;
2436                 params.channel_type = channel_type;
2437         } else if (wdev->preset_chan) {
2438                 params.channel = wdev->preset_chan;
2439                 params.channel_type = wdev->preset_chantype;
2440         } else
2441                 return -EINVAL;
2442
2443         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2444                                           params.channel_type))
2445                 return -EINVAL;
2446
2447         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2448         if (!err)
2449                 wdev->beacon_interval = params.beacon_interval;
2450         return err;
2451 }
2452
2453 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2454 {
2455         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2456         struct net_device *dev = info->user_ptr[1];
2457         struct wireless_dev *wdev = dev->ieee80211_ptr;
2458         struct cfg80211_beacon_data params;
2459         int err;
2460
2461         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2462             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2463                 return -EOPNOTSUPP;
2464
2465         if (!rdev->ops->change_beacon)
2466                 return -EOPNOTSUPP;
2467
2468         if (!wdev->beacon_interval)
2469                 return -EINVAL;
2470
2471         err = nl80211_parse_beacon(info, &params);
2472         if (err)
2473                 return err;
2474
2475         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2476 }
2477
2478 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2479 {
2480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2481         struct net_device *dev = info->user_ptr[1];
2482         struct wireless_dev *wdev = dev->ieee80211_ptr;
2483         int err;
2484
2485         if (!rdev->ops->stop_ap)
2486                 return -EOPNOTSUPP;
2487
2488         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2489             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2490                 return -EOPNOTSUPP;
2491
2492         if (!wdev->beacon_interval)
2493                 return -ENOENT;
2494
2495         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2496         if (!err)
2497                 wdev->beacon_interval = 0;
2498         return err;
2499 }
2500
2501 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2502         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2503         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2504         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2505         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2506         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2507         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2508 };
2509
2510 static int parse_station_flags(struct genl_info *info,
2511                                enum nl80211_iftype iftype,
2512                                struct station_parameters *params)
2513 {
2514         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2515         struct nlattr *nla;
2516         int flag;
2517
2518         /*
2519          * Try parsing the new attribute first so userspace
2520          * can specify both for older kernels.
2521          */
2522         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2523         if (nla) {
2524                 struct nl80211_sta_flag_update *sta_flags;
2525
2526                 sta_flags = nla_data(nla);
2527                 params->sta_flags_mask = sta_flags->mask;
2528                 params->sta_flags_set = sta_flags->set;
2529                 if ((params->sta_flags_mask |
2530                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2531                         return -EINVAL;
2532                 return 0;
2533         }
2534
2535         /* if present, parse the old attribute */
2536
2537         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2538         if (!nla)
2539                 return 0;
2540
2541         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2542                              nla, sta_flags_policy))
2543                 return -EINVAL;
2544
2545         /*
2546          * Only allow certain flags for interface types so that
2547          * other attributes are silently ignored. Remember that
2548          * this is backward compatibility code with old userspace
2549          * and shouldn't be hit in other cases anyway.
2550          */
2551         switch (iftype) {
2552         case NL80211_IFTYPE_AP:
2553         case NL80211_IFTYPE_AP_VLAN:
2554         case NL80211_IFTYPE_P2P_GO:
2555                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2556                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2557                                          BIT(NL80211_STA_FLAG_WME) |
2558                                          BIT(NL80211_STA_FLAG_MFP);
2559                 break;
2560         case NL80211_IFTYPE_P2P_CLIENT:
2561         case NL80211_IFTYPE_STATION:
2562                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2563                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2564                 break;
2565         case NL80211_IFTYPE_MESH_POINT:
2566                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2567                                          BIT(NL80211_STA_FLAG_MFP) |
2568                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2569         default:
2570                 return -EINVAL;
2571         }
2572
2573         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2574                 if (flags[flag]) {
2575                         params->sta_flags_set |= (1<<flag);
2576
2577                         /* no longer support new API additions in old API */
2578                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2579                                 return -EINVAL;
2580                 }
2581         }
2582
2583         return 0;
2584 }
2585
2586 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2587                                  int attr)
2588 {
2589         struct nlattr *rate;
2590         u16 bitrate;
2591
2592         rate = nla_nest_start(msg, attr);
2593         if (!rate)
2594                 goto nla_put_failure;
2595
2596         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2597         bitrate = cfg80211_calculate_bitrate(info);
2598         if ((bitrate > 0 &&
2599              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2600             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2601              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2602             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2603              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2604             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2605              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2606                 goto nla_put_failure;
2607
2608         nla_nest_end(msg, rate);
2609         return true;
2610
2611 nla_put_failure:
2612         return false;
2613 }
2614
2615 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2616                                 int flags,
2617                                 struct cfg80211_registered_device *rdev,
2618                                 struct net_device *dev,
2619                                 const u8 *mac_addr, struct station_info *sinfo)
2620 {
2621         void *hdr;
2622         struct nlattr *sinfoattr, *bss_param;
2623
2624         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2625         if (!hdr)
2626                 return -1;
2627
2628         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2629             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2630             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2631                 goto nla_put_failure;
2632
2633         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2634         if (!sinfoattr)
2635                 goto nla_put_failure;
2636         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2637             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2638                         sinfo->connected_time))
2639                 goto nla_put_failure;
2640         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2641             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2642                         sinfo->inactive_time))
2643                 goto nla_put_failure;
2644         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2645             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2646                         sinfo->rx_bytes))
2647                 goto nla_put_failure;
2648         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2649             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2650                         sinfo->tx_bytes))
2651                 goto nla_put_failure;
2652         if ((sinfo->filled & STATION_INFO_LLID) &&
2653             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2654                 goto nla_put_failure;
2655         if ((sinfo->filled & STATION_INFO_PLID) &&
2656             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2657                 goto nla_put_failure;
2658         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2659             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2660                        sinfo->plink_state))
2661                 goto nla_put_failure;
2662         switch (rdev->wiphy.signal_type) {
2663         case CFG80211_SIGNAL_TYPE_MBM:
2664                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2665                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2666                                sinfo->signal))
2667                         goto nla_put_failure;
2668                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2669                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2670                                sinfo->signal_avg))
2671                         goto nla_put_failure;
2672                 break;
2673         default:
2674                 break;
2675         }
2676         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2677                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2678                                           NL80211_STA_INFO_TX_BITRATE))
2679                         goto nla_put_failure;
2680         }
2681         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2682                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2683                                           NL80211_STA_INFO_RX_BITRATE))
2684                         goto nla_put_failure;
2685         }
2686         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2687             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2688                         sinfo->rx_packets))
2689                 goto nla_put_failure;
2690         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2691             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2692                         sinfo->tx_packets))
2693                 goto nla_put_failure;
2694         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2695             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2696                         sinfo->tx_retries))
2697                 goto nla_put_failure;
2698         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2699             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2700                         sinfo->tx_failed))
2701                 goto nla_put_failure;
2702         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2703             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2704                         sinfo->beacon_loss_count))
2705                 goto nla_put_failure;
2706         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2707                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2708                 if (!bss_param)
2709                         goto nla_put_failure;
2710
2711                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2712                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2713                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2714                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2715                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2716                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2717                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2718                                sinfo->bss_param.dtim_period) ||
2719                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2720                                 sinfo->bss_param.beacon_interval))
2721                         goto nla_put_failure;
2722
2723                 nla_nest_end(msg, bss_param);
2724         }
2725         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2726             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2727                     sizeof(struct nl80211_sta_flag_update),
2728                     &sinfo->sta_flags))
2729                 goto nla_put_failure;
2730         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2731                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2732                             sinfo->t_offset))
2733                 goto nla_put_failure;
2734         nla_nest_end(msg, sinfoattr);
2735
2736         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2737             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2738                     sinfo->assoc_req_ies))
2739                 goto nla_put_failure;
2740
2741         return genlmsg_end(msg, hdr);
2742
2743  nla_put_failure:
2744         genlmsg_cancel(msg, hdr);
2745         return -EMSGSIZE;
2746 }
2747
2748 static int nl80211_dump_station(struct sk_buff *skb,
2749                                 struct netlink_callback *cb)
2750 {
2751         struct station_info sinfo;
2752         struct cfg80211_registered_device *dev;
2753         struct net_device *netdev;
2754         u8 mac_addr[ETH_ALEN];
2755         int sta_idx = cb->args[1];
2756         int err;
2757
2758         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2759         if (err)
2760                 return err;
2761
2762         if (!dev->ops->dump_station) {
2763                 err = -EOPNOTSUPP;
2764                 goto out_err;
2765         }
2766
2767         while (1) {
2768                 memset(&sinfo, 0, sizeof(sinfo));
2769                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2770                                              mac_addr, &sinfo);
2771                 if (err == -ENOENT)
2772                         break;
2773                 if (err)
2774                         goto out_err;
2775
2776                 if (nl80211_send_station(skb,
2777                                 NETLINK_CB(cb->skb).pid,
2778                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2779                                 dev, netdev, mac_addr,
2780                                 &sinfo) < 0)
2781                         goto out;
2782
2783                 sta_idx++;
2784         }
2785
2786
2787  out:
2788         cb->args[1] = sta_idx;
2789         err = skb->len;
2790  out_err:
2791         nl80211_finish_netdev_dump(dev);
2792
2793         return err;
2794 }
2795
2796 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2797 {
2798         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2799         struct net_device *dev = info->user_ptr[1];
2800         struct station_info sinfo;
2801         struct sk_buff *msg;
2802         u8 *mac_addr = NULL;
2803         int err;
2804
2805         memset(&sinfo, 0, sizeof(sinfo));
2806
2807         if (!info->attrs[NL80211_ATTR_MAC])
2808                 return -EINVAL;
2809
2810         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2811
2812         if (!rdev->ops->get_station)
2813                 return -EOPNOTSUPP;
2814
2815         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2816         if (err)
2817                 return err;
2818
2819         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2820         if (!msg)
2821                 return -ENOMEM;
2822
2823         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2824                                  rdev, dev, mac_addr, &sinfo) < 0) {
2825                 nlmsg_free(msg);
2826                 return -ENOBUFS;
2827         }
2828
2829         return genlmsg_reply(msg, info);
2830 }
2831
2832 /*
2833  * Get vlan interface making sure it is running and on the right wiphy.
2834  */
2835 static struct net_device *get_vlan(struct genl_info *info,
2836                                    struct cfg80211_registered_device *rdev)
2837 {
2838         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2839         struct net_device *v;
2840         int ret;
2841
2842         if (!vlanattr)
2843                 return NULL;
2844
2845         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2846         if (!v)
2847                 return ERR_PTR(-ENODEV);
2848
2849         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2850                 ret = -EINVAL;
2851                 goto error;
2852         }
2853
2854         if (!netif_running(v)) {
2855                 ret = -ENETDOWN;
2856                 goto error;
2857         }
2858
2859         return v;
2860  error:
2861         dev_put(v);
2862         return ERR_PTR(ret);
2863 }
2864
2865 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2866 {
2867         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2868         int err;
2869         struct net_device *dev = info->user_ptr[1];
2870         struct station_parameters params;
2871         u8 *mac_addr = NULL;
2872
2873         memset(&params, 0, sizeof(params));
2874
2875         params.listen_interval = -1;
2876         params.plink_state = -1;
2877
2878         if (info->attrs[NL80211_ATTR_STA_AID])
2879                 return -EINVAL;
2880
2881         if (!info->attrs[NL80211_ATTR_MAC])
2882                 return -EINVAL;
2883
2884         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2885
2886         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2887                 params.supported_rates =
2888                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2889                 params.supported_rates_len =
2890                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2891         }
2892
2893         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2894                 params.listen_interval =
2895                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2896
2897         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2898                 params.ht_capa =
2899                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2900
2901         if (!rdev->ops->change_station)
2902                 return -EOPNOTSUPP;
2903
2904         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2905                 return -EINVAL;
2906
2907         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2908                 params.plink_action =
2909                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2910
2911         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2912                 params.plink_state =
2913                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2914
2915         switch (dev->ieee80211_ptr->iftype) {
2916         case NL80211_IFTYPE_AP:
2917         case NL80211_IFTYPE_AP_VLAN:
2918         case NL80211_IFTYPE_P2P_GO:
2919                 /* disallow mesh-specific things */
2920                 if (params.plink_action)
2921                         return -EINVAL;
2922
2923                 /* TDLS can't be set, ... */
2924                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2925                         return -EINVAL;
2926                 /*
2927                  * ... but don't bother the driver with it. This works around
2928                  * a hostapd/wpa_supplicant issue -- it always includes the
2929                  * TLDS_PEER flag in the mask even for AP mode.
2930                  */
2931                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2932
2933                 /* accept only the listed bits */
2934                 if (params.sta_flags_mask &
2935                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2936                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2937                                   BIT(NL80211_STA_FLAG_WME) |
2938                                   BIT(NL80211_STA_FLAG_MFP)))
2939                         return -EINVAL;
2940
2941                 /* must be last in here for error handling */
2942                 params.vlan = get_vlan(info, rdev);
2943                 if (IS_ERR(params.vlan))
2944                         return PTR_ERR(params.vlan);
2945                 break;
2946         case NL80211_IFTYPE_P2P_CLIENT:
2947         case NL80211_IFTYPE_STATION:
2948                 /*
2949                  * Don't allow userspace to change the TDLS_PEER flag,
2950                  * but silently ignore attempts to change it since we
2951                  * don't have state here to verify that it doesn't try
2952                  * to change the flag.
2953                  */
2954                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2955                 /* fall through */
2956         case NL80211_IFTYPE_ADHOC:
2957                 /* disallow things sta doesn't support */
2958                 if (params.plink_action)
2959                         return -EINVAL;
2960                 if (params.ht_capa)
2961                         return -EINVAL;
2962                 if (params.listen_interval >= 0)
2963                         return -EINVAL;
2964                 /* reject any changes other than AUTHORIZED */
2965                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2966                         return -EINVAL;
2967                 break;
2968         case NL80211_IFTYPE_MESH_POINT:
2969                 /* disallow things mesh doesn't support */
2970                 if (params.vlan)
2971                         return -EINVAL;
2972                 if (params.ht_capa)
2973                         return -EINVAL;
2974                 if (params.listen_interval >= 0)
2975                         return -EINVAL;
2976                 /*
2977                  * No special handling for TDLS here -- the userspace
2978                  * mesh code doesn't have this bug.
2979                  */
2980                 if (params.sta_flags_mask &
2981                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2982                                   BIT(NL80211_STA_FLAG_MFP) |
2983                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2984                         return -EINVAL;
2985                 break;
2986         default:
2987                 return -EOPNOTSUPP;
2988         }
2989
2990         /* be aware of params.vlan when changing code here */
2991
2992         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2993
2994         if (params.vlan)
2995                 dev_put(params.vlan);
2996
2997         return err;
2998 }
2999
3000 static struct nla_policy
3001 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3002         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3003         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3004 };
3005
3006 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3007 {
3008         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3009         int err;
3010         struct net_device *dev = info->user_ptr[1];
3011         struct station_parameters params;
3012         u8 *mac_addr = NULL;
3013
3014         memset(&params, 0, sizeof(params));
3015
3016         if (!info->attrs[NL80211_ATTR_MAC])
3017                 return -EINVAL;
3018
3019         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3020                 return -EINVAL;
3021
3022         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3023                 return -EINVAL;
3024
3025         if (!info->attrs[NL80211_ATTR_STA_AID])
3026                 return -EINVAL;
3027
3028         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3029         params.supported_rates =
3030                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3031         params.supported_rates_len =
3032                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3033         params.listen_interval =
3034                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3035
3036         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3037         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3038                 return -EINVAL;
3039
3040         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3041                 params.ht_capa =
3042                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3043
3044         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3045                 params.plink_action =
3046                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3047
3048         if (!rdev->ops->add_station)
3049                 return -EOPNOTSUPP;
3050
3051         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3052                 return -EINVAL;
3053
3054         switch (dev->ieee80211_ptr->iftype) {
3055         case NL80211_IFTYPE_AP:
3056         case NL80211_IFTYPE_AP_VLAN:
3057         case NL80211_IFTYPE_P2P_GO:
3058                 /* parse WME attributes if sta is WME capable */
3059                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3060                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3061                     info->attrs[NL80211_ATTR_STA_WME]) {
3062                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3063                         struct nlattr *nla;
3064
3065                         nla = info->attrs[NL80211_ATTR_STA_WME];
3066                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3067                                                nl80211_sta_wme_policy);
3068                         if (err)
3069                                 return err;
3070
3071                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3072                                 params.uapsd_queues =
3073                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3074                         if (params.uapsd_queues &
3075                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3076                                 return -EINVAL;
3077
3078                         if (tb[NL80211_STA_WME_MAX_SP])
3079                                 params.max_sp =
3080                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3081
3082                         if (params.max_sp &
3083                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3084                                 return -EINVAL;
3085
3086                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3087                 }
3088                 /* TDLS peers cannot be added */
3089                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3090                         return -EINVAL;
3091                 /* but don't bother the driver with it */
3092                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3093
3094                 /* must be last in here for error handling */
3095                 params.vlan = get_vlan(info, rdev);
3096                 if (IS_ERR(params.vlan))
3097                         return PTR_ERR(params.vlan);
3098                 break;
3099         case NL80211_IFTYPE_MESH_POINT:
3100                 /* TDLS peers cannot be added */
3101                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3102                         return -EINVAL;
3103                 break;
3104         case NL80211_IFTYPE_STATION:
3105                 /* Only TDLS peers can be added */
3106                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3107                         return -EINVAL;
3108                 /* Can only add if TDLS ... */
3109                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3110                         return -EOPNOTSUPP;
3111                 /* ... with external setup is supported */
3112                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3113                         return -EOPNOTSUPP;
3114                 break;
3115         default:
3116                 return -EOPNOTSUPP;
3117         }
3118
3119         /* be aware of params.vlan when changing code here */
3120
3121         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3122
3123         if (params.vlan)
3124                 dev_put(params.vlan);
3125         return err;
3126 }
3127
3128 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3129 {
3130         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3131         struct net_device *dev = info->user_ptr[1];
3132         u8 *mac_addr = NULL;
3133
3134         if (info->attrs[NL80211_ATTR_MAC])
3135                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3136
3137         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3138             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3139             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3140             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3141                 return -EINVAL;
3142
3143         if (!rdev->ops->del_station)
3144                 return -EOPNOTSUPP;
3145
3146         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3147 }
3148
3149 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3150                                 int flags, struct net_device *dev,
3151                                 u8 *dst, u8 *next_hop,
3152                                 struct mpath_info *pinfo)
3153 {
3154         void *hdr;
3155         struct nlattr *pinfoattr;
3156
3157         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3158         if (!hdr)
3159                 return -1;
3160
3161         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3162             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3163             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3164             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3165                 goto nla_put_failure;
3166
3167         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3168         if (!pinfoattr)
3169                 goto nla_put_failure;
3170         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3171             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3172                         pinfo->frame_qlen))
3173                 goto nla_put_failure;
3174         if (((pinfo->filled & MPATH_INFO_SN) &&
3175              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3176             ((pinfo->filled & MPATH_INFO_METRIC) &&
3177              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3178                          pinfo->metric)) ||
3179             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3180              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3181                          pinfo->exptime)) ||
3182             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3183              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3184                         pinfo->flags)) ||
3185             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3186              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3187                          pinfo->discovery_timeout)) ||
3188             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3189              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3190                         pinfo->discovery_retries)))
3191                 goto nla_put_failure;
3192
3193         nla_nest_end(msg, pinfoattr);
3194
3195         return genlmsg_end(msg, hdr);
3196
3197  nla_put_failure:
3198         genlmsg_cancel(msg, hdr);
3199         return -EMSGSIZE;
3200 }
3201
3202 static int nl80211_dump_mpath(struct sk_buff *skb,
3203                               struct netlink_callback *cb)
3204 {
3205         struct mpath_info pinfo;
3206         struct cfg80211_registered_device *dev;
3207         struct net_device *netdev;
3208         u8 dst[ETH_ALEN];
3209         u8 next_hop[ETH_ALEN];
3210         int path_idx = cb->args[1];
3211         int err;
3212
3213         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3214         if (err)
3215                 return err;
3216
3217         if (!dev->ops->dump_mpath) {
3218                 err = -EOPNOTSUPP;
3219                 goto out_err;
3220         }
3221
3222         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3223                 err = -EOPNOTSUPP;
3224                 goto out_err;
3225         }
3226
3227         while (1) {
3228                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3229                                            dst, next_hop, &pinfo);
3230                 if (err == -ENOENT)
3231                         break;
3232                 if (err)
3233                         goto out_err;
3234
3235                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3236                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3237                                        netdev, dst, next_hop,
3238                                        &pinfo) < 0)
3239                         goto out;
3240
3241                 path_idx++;
3242         }
3243
3244
3245  out:
3246         cb->args[1] = path_idx;
3247         err = skb->len;
3248  out_err:
3249         nl80211_finish_netdev_dump(dev);
3250         return err;
3251 }
3252
3253 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3254 {
3255         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3256         int err;
3257         struct net_device *dev = info->user_ptr[1];
3258         struct mpath_info pinfo;
3259         struct sk_buff *msg;
3260         u8 *dst = NULL;
3261         u8 next_hop[ETH_ALEN];
3262
3263         memset(&pinfo, 0, sizeof(pinfo));
3264
3265         if (!info->attrs[NL80211_ATTR_MAC])
3266                 return -EINVAL;
3267
3268         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3269
3270         if (!rdev->ops->get_mpath)
3271                 return -EOPNOTSUPP;
3272
3273         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3274                 return -EOPNOTSUPP;
3275
3276         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3277         if (err)
3278                 return err;
3279
3280         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3281         if (!msg)
3282                 return -ENOMEM;
3283
3284         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3285                                  dev, dst, next_hop, &pinfo) < 0) {
3286                 nlmsg_free(msg);
3287                 return -ENOBUFS;
3288         }
3289
3290         return genlmsg_reply(msg, info);
3291 }
3292
3293 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3294 {
3295         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3296         struct net_device *dev = info->user_ptr[1];
3297         u8 *dst = NULL;
3298         u8 *next_hop = NULL;
3299
3300         if (!info->attrs[NL80211_ATTR_MAC])
3301                 return -EINVAL;
3302
3303         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3304                 return -EINVAL;
3305
3306         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3307         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3308
3309         if (!rdev->ops->change_mpath)
3310                 return -EOPNOTSUPP;
3311
3312         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3313                 return -EOPNOTSUPP;
3314
3315         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3316 }
3317
3318 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3319 {
3320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3321         struct net_device *dev = info->user_ptr[1];
3322         u8 *dst = NULL;
3323         u8 *next_hop = NULL;
3324
3325         if (!info->attrs[NL80211_ATTR_MAC])
3326                 return -EINVAL;
3327
3328         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3329                 return -EINVAL;
3330
3331         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3332         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3333
3334         if (!rdev->ops->add_mpath)
3335                 return -EOPNOTSUPP;
3336
3337         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3338                 return -EOPNOTSUPP;
3339
3340         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3341 }
3342
3343 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3344 {
3345         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3346         struct net_device *dev = info->user_ptr[1];
3347         u8 *dst = NULL;
3348
3349         if (info->attrs[NL80211_ATTR_MAC])
3350                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3351
3352         if (!rdev->ops->del_mpath)
3353                 return -EOPNOTSUPP;
3354
3355         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3356 }
3357
3358 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3359 {
3360         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3361         struct net_device *dev = info->user_ptr[1];
3362         struct bss_parameters params;
3363
3364         memset(&params, 0, sizeof(params));
3365         /* default to not changing parameters */
3366         params.use_cts_prot = -1;
3367         params.use_short_preamble = -1;
3368         params.use_short_slot_time = -1;
3369         params.ap_isolate = -1;
3370         params.ht_opmode = -1;
3371
3372         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3373                 params.use_cts_prot =
3374                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3375         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3376                 params.use_short_preamble =
3377                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3378         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3379                 params.use_short_slot_time =
3380                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3381         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3382                 params.basic_rates =
3383                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3384                 params.basic_rates_len =
3385                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3386         }
3387         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3388                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3389         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3390                 params.ht_opmode =
3391                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3392
3393         if (!rdev->ops->change_bss)
3394                 return -EOPNOTSUPP;
3395
3396         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3397             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3398                 return -EOPNOTSUPP;
3399
3400         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3401 }
3402
3403 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3404         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3405         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3406         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3407         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3408         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3409         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3410 };
3411
3412 static int parse_reg_rule(struct nlattr *tb[],
3413         struct ieee80211_reg_rule *reg_rule)
3414 {
3415         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3416         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3417
3418         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3419                 return -EINVAL;
3420         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3421                 return -EINVAL;
3422         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3423                 return -EINVAL;
3424         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3425                 return -EINVAL;
3426         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3427                 return -EINVAL;
3428
3429         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3430
3431         freq_range->start_freq_khz =
3432                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3433         freq_range->end_freq_khz =
3434                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3435         freq_range->max_bandwidth_khz =
3436                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3437
3438         power_rule->max_eirp =
3439                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3440
3441         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3442                 power_rule->max_antenna_gain =
3443                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3444
3445         return 0;
3446 }
3447
3448 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3449 {
3450         int r;
3451         char *data = NULL;
3452
3453         /*
3454          * You should only get this when cfg80211 hasn't yet initialized
3455          * completely when built-in to the kernel right between the time
3456          * window between nl80211_init() and regulatory_init(), if that is
3457          * even possible.
3458          */
3459         mutex_lock(&cfg80211_mutex);
3460         if (unlikely(!cfg80211_regdomain)) {
3461                 mutex_unlock(&cfg80211_mutex);
3462                 return -EINPROGRESS;
3463         }
3464         mutex_unlock(&cfg80211_mutex);
3465
3466         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3467                 return -EINVAL;
3468
3469         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3470
3471         r = regulatory_hint_user(data);
3472
3473         return r;
3474 }
3475
3476 static int nl80211_get_mesh_config(struct sk_buff *skb,
3477                                    struct genl_info *info)
3478 {
3479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3480         struct net_device *dev = info->user_ptr[1];
3481         struct wireless_dev *wdev = dev->ieee80211_ptr;
3482         struct mesh_config cur_params;
3483         int err = 0;
3484         void *hdr;
3485         struct nlattr *pinfoattr;
3486         struct sk_buff *msg;
3487
3488         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3489                 return -EOPNOTSUPP;
3490
3491         if (!rdev->ops->get_mesh_config)
3492                 return -EOPNOTSUPP;
3493
3494         wdev_lock(wdev);
3495         /* If not connected, get default parameters */
3496         if (!wdev->mesh_id_len)
3497                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3498         else
3499                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3500                                                  &cur_params);
3501         wdev_unlock(wdev);
3502
3503         if (err)
3504                 return err;
3505
3506         /* Draw up a netlink message to send back */
3507         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3508         if (!msg)
3509                 return -ENOMEM;
3510         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3511                              NL80211_CMD_GET_MESH_CONFIG);
3512         if (!hdr)
3513                 goto out;
3514         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3515         if (!pinfoattr)
3516                 goto nla_put_failure;
3517         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3518             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3519                         cur_params.dot11MeshRetryTimeout) ||
3520             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3521                         cur_params.dot11MeshConfirmTimeout) ||
3522             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3523                         cur_params.dot11MeshHoldingTimeout) ||
3524             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3525                         cur_params.dot11MeshMaxPeerLinks) ||
3526             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3527                        cur_params.dot11MeshMaxRetries) ||
3528             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3529                        cur_params.dot11MeshTTL) ||
3530             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3531                        cur_params.element_ttl) ||
3532             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3533                        cur_params.auto_open_plinks) ||
3534             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3535                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3536             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3537                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3538             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3539                         cur_params.path_refresh_time) ||
3540             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3541                         cur_params.min_discovery_timeout) ||
3542             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3543                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3544             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3545                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3546             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3547                         cur_params.dot11MeshHWMPperrMinInterval) ||
3548             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3549                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3550             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3551                        cur_params.dot11MeshHWMPRootMode) ||
3552             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3553                         cur_params.dot11MeshHWMPRannInterval) ||
3554             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3555                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3556             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3557                        cur_params.dot11MeshForwarding) ||
3558             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3559                         cur_params.rssi_threshold) ||
3560             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3561                         cur_params.ht_opmode) ||
3562             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3563                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3564             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3565                         cur_params.dot11MeshHWMProotInterval) ||
3566             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3567                         cur_params.dot11MeshHWMPconfirmationInterval))
3568                 goto nla_put_failure;
3569         nla_nest_end(msg, pinfoattr);
3570         genlmsg_end(msg, hdr);
3571         return genlmsg_reply(msg, info);
3572
3573  nla_put_failure:
3574         genlmsg_cancel(msg, hdr);
3575  out:
3576         nlmsg_free(msg);
3577         return -ENOBUFS;
3578 }
3579
3580 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3581         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3582         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3583         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3584         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3585         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3586         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3587         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3588         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3589         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3590         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3591         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3592         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3593         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3594         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3595         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3596         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3597         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3598         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3599         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3600         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3601         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3602         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3603         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3604         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3605         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3606 };
3607
3608 static const struct nla_policy
3609         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3610         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3611         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3612         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3613         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3614         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3615                                     .len = IEEE80211_MAX_DATA_LEN },
3616         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3617 };
3618
3619 static int nl80211_parse_mesh_config(struct genl_info *info,
3620                                      struct mesh_config *cfg,
3621                                      u32 *mask_out)
3622 {
3623         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3624         u32 mask = 0;
3625
3626 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3627 do {\
3628         if (table[attr_num]) {\
3629                 cfg->param = nla_fn(table[attr_num]); \
3630                 mask |= (1 << (attr_num - 1)); \
3631         } \
3632 } while (0);\
3633
3634
3635         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3636                 return -EINVAL;
3637         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3638                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3639                              nl80211_meshconf_params_policy))
3640                 return -EINVAL;
3641
3642         /* This makes sure that there aren't more than 32 mesh config
3643          * parameters (otherwise our bitfield scheme would not work.) */
3644         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3645
3646         /* Fill in the params struct */
3647         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3648                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3649                                   nla_get_u16);
3650         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3651                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3652                                   nla_get_u16);
3653         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3654                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3655                                   nla_get_u16);
3656         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3657                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3658                                   nla_get_u16);
3659         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3660                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3661                                   nla_get_u8);
3662         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3663                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3664         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3665                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3666                                   nla_get_u8);
3667         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3668                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3669                                   nla_get_u8);
3670         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3671                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3672                                   nla_get_u32);
3673         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3674                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3675                                   nla_get_u8);
3676         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3677                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3678                                   nla_get_u32);
3679         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3680                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3681                                   nla_get_u16);
3682         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3683                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3684                                   nla_get_u32);
3685         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3686                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3687                                   nla_get_u16);
3688         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3689                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3690                                   nla_get_u16);
3691         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3692                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3693                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3694                                   nla_get_u16);
3695         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3696                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3697         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3698                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3699                                   nla_get_u16);
3700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3701                                   dot11MeshGateAnnouncementProtocol, mask,
3702                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3703                                   nla_get_u8);
3704         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3705                                   mask, NL80211_MESHCONF_FORWARDING,
3706                                   nla_get_u8);
3707         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3708                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3709                                   nla_get_u32);
3710         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3711                                   mask, NL80211_MESHCONF_HT_OPMODE,
3712                                   nla_get_u16);
3713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3714                                   mask,
3715                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3716                                   nla_get_u32);
3717         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3718                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3719                                   nla_get_u16);
3720         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3721                                   dot11MeshHWMPconfirmationInterval, mask,
3722                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3723                                   nla_get_u16);
3724         if (mask_out)
3725                 *mask_out = mask;
3726
3727         return 0;
3728
3729 #undef FILL_IN_MESH_PARAM_IF_SET
3730 }
3731
3732 static int nl80211_parse_mesh_setup(struct genl_info *info,
3733                                      struct mesh_setup *setup)
3734 {
3735         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3736
3737         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3738                 return -EINVAL;
3739         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3740                              info->attrs[NL80211_ATTR_MESH_SETUP],
3741                              nl80211_mesh_setup_params_policy))
3742                 return -EINVAL;
3743
3744         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3745                 setup->sync_method =
3746                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3747                  IEEE80211_SYNC_METHOD_VENDOR :
3748                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3749
3750         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3751                 setup->path_sel_proto =
3752                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3753                  IEEE80211_PATH_PROTOCOL_VENDOR :
3754                  IEEE80211_PATH_PROTOCOL_HWMP;
3755
3756         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3757                 setup->path_metric =
3758                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3759                  IEEE80211_PATH_METRIC_VENDOR :
3760                  IEEE80211_PATH_METRIC_AIRTIME;
3761
3762
3763         if (tb[NL80211_MESH_SETUP_IE]) {
3764                 struct nlattr *ieattr =
3765                         tb[NL80211_MESH_SETUP_IE];
3766                 if (!is_valid_ie_attr(ieattr))
3767                         return -EINVAL;
3768                 setup->ie = nla_data(ieattr);
3769                 setup->ie_len = nla_len(ieattr);
3770         }
3771         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3772         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3773
3774         return 0;
3775 }
3776
3777 static int nl80211_update_mesh_config(struct sk_buff *skb,
3778                                       struct genl_info *info)
3779 {
3780         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3781         struct net_device *dev = info->user_ptr[1];
3782         struct wireless_dev *wdev = dev->ieee80211_ptr;
3783         struct mesh_config cfg;
3784         u32 mask;
3785         int err;
3786
3787         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3788                 return -EOPNOTSUPP;
3789
3790         if (!rdev->ops->update_mesh_config)
3791                 return -EOPNOTSUPP;
3792
3793         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3794         if (err)
3795                 return err;
3796
3797         wdev_lock(wdev);
3798         if (!wdev->mesh_id_len)
3799                 err = -ENOLINK;
3800
3801         if (!err)
3802                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3803                                                     mask, &cfg);
3804
3805         wdev_unlock(wdev);
3806
3807         return err;
3808 }
3809
3810 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3811 {
3812         struct sk_buff *msg;
3813         void *hdr = NULL;
3814         struct nlattr *nl_reg_rules;
3815         unsigned int i;
3816         int err = -EINVAL;
3817
3818         mutex_lock(&cfg80211_mutex);
3819
3820         if (!cfg80211_regdomain)
3821                 goto out;
3822
3823         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3824         if (!msg) {
3825                 err = -ENOBUFS;
3826                 goto out;
3827         }
3828
3829         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3830                              NL80211_CMD_GET_REG);
3831         if (!hdr)
3832                 goto put_failure;
3833
3834         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3835                            cfg80211_regdomain->alpha2) ||
3836             (cfg80211_regdomain->dfs_region &&
3837              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3838                         cfg80211_regdomain->dfs_region)))
3839                 goto nla_put_failure;
3840
3841         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3842         if (!nl_reg_rules)
3843                 goto nla_put_failure;
3844
3845         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3846                 struct nlattr *nl_reg_rule;
3847                 const struct ieee80211_reg_rule *reg_rule;
3848                 const struct ieee80211_freq_range *freq_range;
3849                 const struct ieee80211_power_rule *power_rule;
3850
3851                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3852                 freq_range = &reg_rule->freq_range;
3853                 power_rule = &reg_rule->power_rule;
3854
3855                 nl_reg_rule = nla_nest_start(msg, i);
3856                 if (!nl_reg_rule)
3857                         goto nla_put_failure;
3858
3859                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3860                                 reg_rule->flags) ||
3861                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3862                                 freq_range->start_freq_khz) ||
3863                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3864                                 freq_range->end_freq_khz) ||
3865                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3866                                 freq_range->max_bandwidth_khz) ||
3867                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3868                                 power_rule->max_antenna_gain) ||
3869                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3870                                 power_rule->max_eirp))
3871                         goto nla_put_failure;
3872
3873                 nla_nest_end(msg, nl_reg_rule);
3874         }
3875
3876         nla_nest_end(msg, nl_reg_rules);
3877
3878         genlmsg_end(msg, hdr);
3879         err = genlmsg_reply(msg, info);
3880         goto out;
3881
3882 nla_put_failure:
3883         genlmsg_cancel(msg, hdr);
3884 put_failure:
3885         nlmsg_free(msg);
3886         err = -EMSGSIZE;
3887 out:
3888         mutex_unlock(&cfg80211_mutex);
3889         return err;
3890 }
3891
3892 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3893 {
3894         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3895         struct nlattr *nl_reg_rule;
3896         char *alpha2 = NULL;
3897         int rem_reg_rules = 0, r = 0;
3898         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3899         u8 dfs_region = 0;
3900         struct ieee80211_regdomain *rd = NULL;
3901
3902         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3903                 return -EINVAL;
3904
3905         if (!info->attrs[NL80211_ATTR_REG_RULES])
3906                 return -EINVAL;
3907
3908         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3909
3910         if (info->attrs[NL80211_ATTR_DFS_REGION])
3911                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3912
3913         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3914                         rem_reg_rules) {
3915                 num_rules++;
3916                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3917                         return -EINVAL;
3918         }
3919
3920         mutex_lock(&cfg80211_mutex);
3921
3922         if (!reg_is_valid_request(alpha2)) {
3923                 r = -EINVAL;
3924                 goto bad_reg;
3925         }
3926
3927         size_of_regd = sizeof(struct ieee80211_regdomain) +
3928                 (num_rules * sizeof(struct ieee80211_reg_rule));
3929
3930         rd = kzalloc(size_of_regd, GFP_KERNEL);
3931         if (!rd) {
3932                 r = -ENOMEM;
3933                 goto bad_reg;
3934         }
3935
3936         rd->n_reg_rules = num_rules;
3937         rd->alpha2[0] = alpha2[0];
3938         rd->alpha2[1] = alpha2[1];
3939
3940         /*
3941          * Disable DFS master mode if the DFS region was
3942          * not supported or known on this kernel.
3943          */
3944         if (reg_supported_dfs_region(dfs_region))
3945                 rd->dfs_region = dfs_region;
3946
3947         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3948                         rem_reg_rules) {
3949                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3950                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3951                         reg_rule_policy);
3952                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3953                 if (r)
3954                         goto bad_reg;
3955
3956                 rule_idx++;
3957
3958                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3959                         r = -EINVAL;
3960                         goto bad_reg;
3961                 }
3962         }
3963
3964         BUG_ON(rule_idx != num_rules);
3965
3966         r = set_regdom(rd);
3967
3968         mutex_unlock(&cfg80211_mutex);
3969
3970         return r;
3971
3972  bad_reg:
3973         mutex_unlock(&cfg80211_mutex);
3974         kfree(rd);
3975         return r;
3976 }
3977
3978 static int validate_scan_freqs(struct nlattr *freqs)
3979 {
3980         struct nlattr *attr1, *attr2;
3981         int n_channels = 0, tmp1, tmp2;
3982
3983         nla_for_each_nested(attr1, freqs, tmp1) {
3984                 n_channels++;
3985                 /*
3986                  * Some hardware has a limited channel list for
3987                  * scanning, and it is pretty much nonsensical
3988                  * to scan for a channel twice, so disallow that
3989                  * and don't require drivers to check that the
3990                  * channel list they get isn't longer than what
3991                  * they can scan, as long as they can scan all
3992                  * the channels they registered at once.
3993                  */
3994                 nla_for_each_nested(attr2, freqs, tmp2)
3995                         if (attr1 != attr2 &&
3996                             nla_get_u32(attr1) == nla_get_u32(attr2))
3997                                 return 0;
3998         }
3999
4000         return n_channels;
4001 }
4002
4003 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4004 {
4005         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4006         struct net_device *dev = info->user_ptr[1];
4007         struct cfg80211_scan_request *request;
4008         struct nlattr *attr;
4009         struct wiphy *wiphy;
4010         int err, tmp, n_ssids = 0, n_channels, i;
4011         size_t ie_len;
4012
4013         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4014                 return -EINVAL;
4015
4016         wiphy = &rdev->wiphy;
4017
4018         if (!rdev->ops->scan)
4019                 return -EOPNOTSUPP;
4020
4021         if (rdev->scan_req)
4022                 return -EBUSY;
4023
4024         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4025                 n_channels = validate_scan_freqs(
4026                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4027                 if (!n_channels)
4028                         return -EINVAL;
4029         } else {
4030                 enum ieee80211_band band;
4031                 n_channels = 0;
4032
4033                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4034                         if (wiphy->bands[band])
4035                                 n_channels += wiphy->bands[band]->n_channels;
4036         }
4037
4038         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4039                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4040                         n_ssids++;
4041
4042         if (n_ssids > wiphy->max_scan_ssids)
4043                 return -EINVAL;
4044
4045         if (info->attrs[NL80211_ATTR_IE])
4046                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4047         else
4048                 ie_len = 0;
4049
4050         if (ie_len > wiphy->max_scan_ie_len)
4051                 return -EINVAL;
4052
4053         request = kzalloc(sizeof(*request)
4054                         + sizeof(*request->ssids) * n_ssids
4055                         + sizeof(*request->channels) * n_channels
4056                         + ie_len, GFP_KERNEL);
4057         if (!request)
4058                 return -ENOMEM;
4059
4060         if (n_ssids)
4061                 request->ssids = (void *)&request->channels[n_channels];
4062         request->n_ssids = n_ssids;
4063         if (ie_len) {
4064                 if (request->ssids)
4065                         request->ie = (void *)(request->ssids + n_ssids);
4066                 else
4067                         request->ie = (void *)(request->channels + n_channels);
4068         }
4069
4070         i = 0;
4071         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4072                 /* user specified, bail out if channel not found */
4073                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4074                         struct ieee80211_channel *chan;
4075
4076                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4077
4078                         if (!chan) {
4079                                 err = -EINVAL;
4080                                 goto out_free;
4081                         }
4082
4083                         /* ignore disabled channels */
4084                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4085                                 continue;
4086
4087                         request->channels[i] = chan;
4088                         i++;
4089                 }
4090         } else {
4091                 enum ieee80211_band band;
4092
4093                 /* all channels */
4094                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4095                         int j;
4096                         if (!wiphy->bands[band])
4097                                 continue;
4098                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4099                                 struct ieee80211_channel *chan;
4100
4101                                 chan = &wiphy->bands[band]->channels[j];
4102
4103                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4104                                         continue;
4105
4106                                 request->channels[i] = chan;
4107                                 i++;
4108                         }
4109                 }
4110         }
4111
4112         if (!i) {
4113                 err = -EINVAL;
4114                 goto out_free;
4115         }
4116
4117         request->n_channels = i;
4118
4119         i = 0;
4120         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4121                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4122                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4123                                 err = -EINVAL;
4124                                 goto out_free;
4125                         }
4126                         request->ssids[i].ssid_len = nla_len(attr);
4127                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4128                         i++;
4129                 }
4130         }
4131
4132         if (info->attrs[NL80211_ATTR_IE]) {
4133                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4134                 memcpy((void *)request->ie,
4135                        nla_data(info->attrs[NL80211_ATTR_IE]),
4136                        request->ie_len);
4137         }
4138
4139         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4140                 if (wiphy->bands[i])
4141                         request->rates[i] =
4142                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4143
4144         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4145                 nla_for_each_nested(attr,
4146                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4147                                     tmp) {
4148                         enum ieee80211_band band = nla_type(attr);
4149
4150                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4151                                 err = -EINVAL;
4152                                 goto out_free;
4153                         }
4154                         err = ieee80211_get_ratemask(wiphy->bands[band],
4155                                                      nla_data(attr),
4156                                                      nla_len(attr),
4157                                                      &request->rates[band]);
4158                         if (err)
4159                                 goto out_free;
4160                 }
4161         }
4162
4163         request->no_cck =
4164                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4165
4166         request->dev = dev;
4167         request->wiphy = &rdev->wiphy;
4168
4169         rdev->scan_req = request;
4170         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4171
4172         if (!err) {
4173                 nl80211_send_scan_start(rdev, dev);
4174                 dev_hold(dev);
4175         } else {
4176  out_free:
4177                 rdev->scan_req = NULL;
4178                 kfree(request);
4179         }
4180
4181         return err;
4182 }
4183
4184 static int nl80211_start_sched_scan(struct sk_buff *skb,
4185                                     struct genl_info *info)
4186 {
4187         struct cfg80211_sched_scan_request *request;
4188         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4189         struct net_device *dev = info->user_ptr[1];
4190         struct nlattr *attr;
4191         struct wiphy *wiphy;
4192         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4193         u32 interval;
4194         enum ieee80211_band band;
4195         size_t ie_len;
4196         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4197
4198         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4199             !rdev->ops->sched_scan_start)
4200                 return -EOPNOTSUPP;
4201
4202         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4203                 return -EINVAL;
4204
4205         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4206                 return -EINVAL;
4207
4208         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4209         if (interval == 0)
4210                 return -EINVAL;
4211
4212         wiphy = &rdev->wiphy;
4213
4214         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4215                 n_channels = validate_scan_freqs(
4216                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4217                 if (!n_channels)
4218                         return -EINVAL;
4219         } else {
4220                 n_channels = 0;
4221
4222                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4223                         if (wiphy->bands[band])
4224                                 n_channels += wiphy->bands[band]->n_channels;
4225         }
4226
4227         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4228                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4229                                     tmp)
4230                         n_ssids++;
4231
4232         if (n_ssids > wiphy->max_sched_scan_ssids)
4233                 return -EINVAL;
4234
4235         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4236                 nla_for_each_nested(attr,
4237                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4238                                     tmp)
4239                         n_match_sets++;
4240
4241         if (n_match_sets > wiphy->max_match_sets)
4242                 return -EINVAL;
4243
4244         if (info->attrs[NL80211_ATTR_IE])
4245                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4246         else
4247                 ie_len = 0;
4248
4249         if (ie_len > wiphy->max_sched_scan_ie_len)
4250                 return -EINVAL;
4251
4252         mutex_lock(&rdev->sched_scan_mtx);
4253
4254         if (rdev->sched_scan_req) {
4255                 err = -EINPROGRESS;
4256                 goto out;
4257         }
4258
4259         request = kzalloc(sizeof(*request)
4260                         + sizeof(*request->ssids) * n_ssids
4261                         + sizeof(*request->match_sets) * n_match_sets
4262                         + sizeof(*request->channels) * n_channels
4263                         + ie_len, GFP_KERNEL);
4264         if (!request) {
4265                 err = -ENOMEM;
4266                 goto out;
4267         }
4268
4269         if (n_ssids)
4270                 request->ssids = (void *)&request->channels[n_channels];
4271         request->n_ssids = n_ssids;
4272         if (ie_len) {
4273                 if (request->ssids)
4274                         request->ie = (void *)(request->ssids + n_ssids);
4275                 else
4276                         request->ie = (void *)(request->channels + n_channels);
4277         }
4278
4279         if (n_match_sets) {
4280                 if (request->ie)
4281                         request->match_sets = (void *)(request->ie + ie_len);
4282                 else if (request->ssids)
4283                         request->match_sets =
4284                                 (void *)(request->ssids + n_ssids);
4285                 else
4286                         request->match_sets =
4287                                 (void *)(request->channels + n_channels);
4288         }
4289         request->n_match_sets = n_match_sets;
4290
4291         i = 0;
4292         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4293                 /* user specified, bail out if channel not found */
4294                 nla_for_each_nested(attr,
4295                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4296                                     tmp) {
4297                         struct ieee80211_channel *chan;
4298
4299                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4300
4301                         if (!chan) {
4302                                 err = -EINVAL;
4303                                 goto out_free;
4304                         }
4305
4306                         /* ignore disabled channels */
4307                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4308                                 continue;
4309
4310                         request->channels[i] = chan;
4311                         i++;
4312                 }
4313         } else {
4314                 /* all channels */
4315                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4316                         int j;
4317                         if (!wiphy->bands[band])
4318                                 continue;
4319                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4320                                 struct ieee80211_channel *chan;
4321
4322                                 chan = &wiphy->bands[band]->channels[j];
4323
4324                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4325                                         continue;
4326
4327                                 request->channels[i] = chan;
4328                                 i++;
4329                         }
4330                 }
4331         }
4332
4333         if (!i) {
4334                 err = -EINVAL;
4335                 goto out_free;
4336         }
4337
4338         request->n_channels = i;
4339
4340         i = 0;
4341         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4342                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4343                                     tmp) {
4344                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4345                                 err = -EINVAL;
4346                                 goto out_free;
4347                         }
4348                         request->ssids[i].ssid_len = nla_len(attr);
4349                         memcpy(request->ssids[i].ssid, nla_data(attr),
4350                                nla_len(attr));
4351                         i++;
4352                 }
4353         }
4354
4355         i = 0;
4356         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4357                 nla_for_each_nested(attr,
4358                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4359                                     tmp) {
4360                         struct nlattr *ssid;
4361
4362                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4363                                   nla_data(attr), nla_len(attr),
4364                                   nl80211_match_policy);
4365                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4366                         if (ssid) {
4367                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4368                                         err = -EINVAL;
4369                                         goto out_free;
4370                                 }
4371                                 memcpy(request->match_sets[i].ssid.ssid,
4372                                        nla_data(ssid), nla_len(ssid));
4373                                 request->match_sets[i].ssid.ssid_len =
4374                                         nla_len(ssid);
4375                         }
4376                         i++;
4377                 }
4378         }
4379
4380         if (info->attrs[NL80211_ATTR_IE]) {
4381                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4382                 memcpy((void *)request->ie,
4383                        nla_data(info->attrs[NL80211_ATTR_IE]),
4384                        request->ie_len);
4385         }
4386
4387         request->dev = dev;
4388         request->wiphy = &rdev->wiphy;
4389         request->interval = interval;
4390
4391         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4392         if (!err) {
4393                 rdev->sched_scan_req = request;
4394                 nl80211_send_sched_scan(rdev, dev,
4395                                         NL80211_CMD_START_SCHED_SCAN);
4396                 goto out;
4397         }
4398
4399 out_free:
4400         kfree(request);
4401 out:
4402         mutex_unlock(&rdev->sched_scan_mtx);
4403         return err;
4404 }
4405
4406 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4407                                    struct genl_info *info)
4408 {
4409         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4410         int err;
4411
4412         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4413             !rdev->ops->sched_scan_stop)
4414                 return -EOPNOTSUPP;
4415
4416         mutex_lock(&rdev->sched_scan_mtx);
4417         err = __cfg80211_stop_sched_scan(rdev, false);
4418         mutex_unlock(&rdev->sched_scan_mtx);
4419
4420         return err;
4421 }
4422
4423 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4424                             u32 seq, int flags,
4425                             struct cfg80211_registered_device *rdev,
4426                             struct wireless_dev *wdev,
4427                             struct cfg80211_internal_bss *intbss)
4428 {
4429         struct cfg80211_bss *res = &intbss->pub;
4430         void *hdr;
4431         struct nlattr *bss;
4432
4433         ASSERT_WDEV_LOCK(wdev);
4434
4435         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4436                              NL80211_CMD_NEW_SCAN_RESULTS);
4437         if (!hdr)
4438                 return -1;
4439
4440         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4441
4442         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4443             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4444                 goto nla_put_failure;
4445
4446         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4447         if (!bss)
4448                 goto nla_put_failure;
4449         if ((!is_zero_ether_addr(res->bssid) &&
4450              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4451             (res->information_elements && res->len_information_elements &&
4452              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4453                      res->len_information_elements,
4454                      res->information_elements)) ||
4455             (res->beacon_ies && res->len_beacon_ies &&
4456              res->beacon_ies != res->information_elements &&
4457              nla_put(msg, NL80211_BSS_BEACON_IES,
4458                      res->len_beacon_ies, res->beacon_ies)))
4459                 goto nla_put_failure;
4460         if (res->tsf &&
4461             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4462                 goto nla_put_failure;
4463         if (res->beacon_interval &&
4464             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4465                 goto nla_put_failure;
4466         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4467             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4468             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4469                         jiffies_to_msecs(jiffies - intbss->ts)))
4470                 goto nla_put_failure;
4471
4472         switch (rdev->wiphy.signal_type) {
4473         case CFG80211_SIGNAL_TYPE_MBM:
4474                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4475                         goto nla_put_failure;
4476                 break;
4477         case CFG80211_SIGNAL_TYPE_UNSPEC:
4478                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4479                         goto nla_put_failure;
4480                 break;
4481         default:
4482                 break;
4483         }
4484
4485         switch (wdev->iftype) {
4486         case NL80211_IFTYPE_P2P_CLIENT:
4487         case NL80211_IFTYPE_STATION:
4488                 if (intbss == wdev->current_bss &&
4489                     nla_put_u32(msg, NL80211_BSS_STATUS,
4490                                 NL80211_BSS_STATUS_ASSOCIATED))
4491                         goto nla_put_failure;
4492                 break;
4493         case NL80211_IFTYPE_ADHOC:
4494                 if (intbss == wdev->current_bss &&
4495                     nla_put_u32(msg, NL80211_BSS_STATUS,
4496                                 NL80211_BSS_STATUS_IBSS_JOINED))
4497                         goto nla_put_failure;
4498                 break;
4499         default:
4500                 break;
4501         }
4502
4503         nla_nest_end(msg, bss);
4504
4505         return genlmsg_end(msg, hdr);
4506
4507  nla_put_failure:
4508         genlmsg_cancel(msg, hdr);
4509         return -EMSGSIZE;
4510 }
4511
4512 static int nl80211_dump_scan(struct sk_buff *skb,
4513                              struct netlink_callback *cb)
4514 {
4515         struct cfg80211_registered_device *rdev;
4516         struct net_device *dev;
4517         struct cfg80211_internal_bss *scan;
4518         struct wireless_dev *wdev;
4519         int start = cb->args[1], idx = 0;
4520         int err;
4521
4522         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4523         if (err)
4524                 return err;
4525
4526         wdev = dev->ieee80211_ptr;
4527
4528         wdev_lock(wdev);
4529         spin_lock_bh(&rdev->bss_lock);
4530         cfg80211_bss_expire(rdev);
4531
4532         cb->seq = rdev->bss_generation;
4533
4534         list_for_each_entry(scan, &rdev->bss_list, list) {
4535                 if (++idx <= start)
4536                         continue;
4537                 if (nl80211_send_bss(skb, cb,
4538                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4539                                 rdev, wdev, scan) < 0) {
4540                         idx--;
4541                         break;
4542                 }
4543         }
4544
4545         spin_unlock_bh(&rdev->bss_lock);
4546         wdev_unlock(wdev);
4547
4548         cb->args[1] = idx;
4549         nl80211_finish_netdev_dump(rdev);
4550
4551         return skb->len;
4552 }
4553
4554 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4555                                 int flags, struct net_device *dev,
4556                                 struct survey_info *survey)
4557 {
4558         void *hdr;
4559         struct nlattr *infoattr;
4560
4561         hdr = nl80211hdr_put(msg, pid, seq, flags,
4562                              NL80211_CMD_NEW_SURVEY_RESULTS);
4563         if (!hdr)
4564                 return -ENOMEM;
4565
4566         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4567                 goto nla_put_failure;
4568
4569         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4570         if (!infoattr)
4571                 goto nla_put_failure;
4572
4573         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4574                         survey->channel->center_freq))
4575                 goto nla_put_failure;
4576
4577         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4578             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4579                 goto nla_put_failure;
4580         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4581             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4582                 goto nla_put_failure;
4583         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4584             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4585                         survey->channel_time))
4586                 goto nla_put_failure;
4587         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4588             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4589                         survey->channel_time_busy))
4590                 goto nla_put_failure;
4591         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4592             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4593                         survey->channel_time_ext_busy))
4594                 goto nla_put_failure;
4595         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4596             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4597                         survey->channel_time_rx))
4598                 goto nla_put_failure;
4599         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4600             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4601                         survey->channel_time_tx))
4602                 goto nla_put_failure;
4603
4604         nla_nest_end(msg, infoattr);
4605
4606         return genlmsg_end(msg, hdr);
4607
4608  nla_put_failure:
4609         genlmsg_cancel(msg, hdr);
4610         return -EMSGSIZE;
4611 }
4612
4613 static int nl80211_dump_survey(struct sk_buff *skb,
4614                         struct netlink_callback *cb)
4615 {
4616         struct survey_info survey;
4617         struct cfg80211_registered_device *dev;
4618         struct net_device *netdev;
4619         int survey_idx = cb->args[1];
4620         int res;
4621
4622         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4623         if (res)
4624                 return res;
4625
4626         if (!dev->ops->dump_survey) {
4627                 res = -EOPNOTSUPP;
4628                 goto out_err;
4629         }
4630
4631         while (1) {
4632                 struct ieee80211_channel *chan;
4633
4634                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4635                                             &survey);
4636                 if (res == -ENOENT)
4637                         break;
4638                 if (res)
4639                         goto out_err;
4640
4641                 /* Survey without a channel doesn't make sense */
4642                 if (!survey.channel) {
4643                         res = -EINVAL;
4644                         goto out;
4645                 }
4646
4647                 chan = ieee80211_get_channel(&dev->wiphy,
4648                                              survey.channel->center_freq);
4649                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4650                         survey_idx++;
4651                         continue;
4652                 }
4653
4654                 if (nl80211_send_survey(skb,
4655                                 NETLINK_CB(cb->skb).pid,
4656                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4657                                 netdev,
4658                                 &survey) < 0)
4659                         goto out;
4660                 survey_idx++;
4661         }
4662
4663  out:
4664         cb->args[1] = survey_idx;
4665         res = skb->len;
4666  out_err:
4667         nl80211_finish_netdev_dump(dev);
4668         return res;
4669 }
4670
4671 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4672 {
4673         return auth_type <= NL80211_AUTHTYPE_MAX;
4674 }
4675
4676 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4677 {
4678         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4679                                   NL80211_WPA_VERSION_2));
4680 }
4681
4682 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4683 {
4684         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4685         struct net_device *dev = info->user_ptr[1];
4686         struct ieee80211_channel *chan;
4687         const u8 *bssid, *ssid, *ie = NULL;
4688         int err, ssid_len, ie_len = 0;
4689         enum nl80211_auth_type auth_type;
4690         struct key_parse key;
4691         bool local_state_change;
4692
4693         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4694                 return -EINVAL;
4695
4696         if (!info->attrs[NL80211_ATTR_MAC])
4697                 return -EINVAL;
4698
4699         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4700                 return -EINVAL;
4701
4702         if (!info->attrs[NL80211_ATTR_SSID])
4703                 return -EINVAL;
4704
4705         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4706                 return -EINVAL;
4707
4708         err = nl80211_parse_key(info, &key);
4709         if (err)
4710                 return err;
4711
4712         if (key.idx >= 0) {
4713                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4714                         return -EINVAL;
4715                 if (!key.p.key || !key.p.key_len)
4716                         return -EINVAL;
4717                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4718                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4719                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4720                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4721                         return -EINVAL;
4722                 if (key.idx > 4)
4723                         return -EINVAL;
4724         } else {
4725                 key.p.key_len = 0;
4726                 key.p.key = NULL;
4727         }
4728
4729         if (key.idx >= 0) {
4730                 int i;
4731                 bool ok = false;
4732                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4733                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4734                                 ok = true;
4735                                 break;
4736                         }
4737                 }
4738                 if (!ok)
4739                         return -EINVAL;
4740         }
4741
4742         if (!rdev->ops->auth)
4743                 return -EOPNOTSUPP;
4744
4745         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4746             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4747                 return -EOPNOTSUPP;
4748
4749         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4750         chan = ieee80211_get_channel(&rdev->wiphy,
4751                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4752         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4753                 return -EINVAL;
4754
4755         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4756         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4757
4758         if (info->attrs[NL80211_ATTR_IE]) {
4759                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4760                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4761         }
4762
4763         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4764         if (!nl80211_valid_auth_type(auth_type))
4765                 return -EINVAL;
4766
4767         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4768
4769         /*
4770          * Since we no longer track auth state, ignore
4771          * requests to only change local state.
4772          */
4773         if (local_state_change)
4774                 return 0;
4775
4776         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4777                                   ssid, ssid_len, ie, ie_len,
4778                                   key.p.key, key.p.key_len, key.idx);
4779 }
4780
4781 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4782                                    struct genl_info *info,
4783                                    struct cfg80211_crypto_settings *settings,
4784                                    int cipher_limit)
4785 {
4786         memset(settings, 0, sizeof(*settings));
4787
4788         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4789
4790         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4791                 u16 proto;
4792                 proto = nla_get_u16(
4793                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4794                 settings->control_port_ethertype = cpu_to_be16(proto);
4795                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4796                     proto != ETH_P_PAE)
4797                         return -EINVAL;
4798                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4799                         settings->control_port_no_encrypt = true;
4800         } else
4801                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4802
4803         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4804                 void *data;
4805                 int len, i;
4806
4807                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4808                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4809                 settings->n_ciphers_pairwise = len / sizeof(u32);
4810
4811                 if (len % sizeof(u32))
4812                         return -EINVAL;
4813
4814                 if (settings->n_ciphers_pairwise > cipher_limit)
4815                         return -EINVAL;
4816
4817                 memcpy(settings->ciphers_pairwise, data, len);
4818
4819                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4820                         if (!cfg80211_supported_cipher_suite(
4821                                         &rdev->wiphy,
4822                                         settings->ciphers_pairwise[i]))
4823                                 return -EINVAL;
4824         }
4825
4826         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4827                 settings->cipher_group =
4828                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4829                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4830                                                      settings->cipher_group))
4831                         return -EINVAL;
4832         }
4833
4834         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4835                 settings->wpa_versions =
4836                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4837                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4838                         return -EINVAL;
4839         }
4840
4841         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4842                 void *data;
4843                 int len;
4844
4845                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4846                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4847                 settings->n_akm_suites = len / sizeof(u32);
4848
4849                 if (len % sizeof(u32))
4850                         return -EINVAL;
4851
4852                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4853                         return -EINVAL;
4854
4855                 memcpy(settings->akm_suites, data, len);
4856         }
4857
4858         return 0;
4859 }
4860
4861 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4862 {
4863         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4864         struct net_device *dev = info->user_ptr[1];
4865         struct cfg80211_crypto_settings crypto;
4866         struct ieee80211_channel *chan;
4867         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4868         int err, ssid_len, ie_len = 0;
4869         bool use_mfp = false;
4870         u32 flags = 0;
4871         struct ieee80211_ht_cap *ht_capa = NULL;
4872         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4873
4874         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4875                 return -EINVAL;
4876
4877         if (!info->attrs[NL80211_ATTR_MAC] ||
4878             !info->attrs[NL80211_ATTR_SSID] ||
4879             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4880                 return -EINVAL;
4881
4882         if (!rdev->ops->assoc)
4883                 return -EOPNOTSUPP;
4884
4885         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4886             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4887                 return -EOPNOTSUPP;
4888
4889         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4890
4891         chan = ieee80211_get_channel(&rdev->wiphy,
4892                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4893         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4894                 return -EINVAL;
4895
4896         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4897         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4898
4899         if (info->attrs[NL80211_ATTR_IE]) {
4900                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4901                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4902         }
4903
4904         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4905                 enum nl80211_mfp mfp =
4906                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4907                 if (mfp == NL80211_MFP_REQUIRED)
4908                         use_mfp = true;
4909                 else if (mfp != NL80211_MFP_NO)
4910                         return -EINVAL;
4911         }
4912
4913         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4914                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4915
4916         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4917                 flags |= ASSOC_REQ_DISABLE_HT;
4918
4919         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4920                 ht_capa_mask =
4921                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4922
4923         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4924                 if (!ht_capa_mask)
4925                         return -EINVAL;
4926                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4927         }
4928
4929         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4930         if (!err)
4931                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4932                                           ssid, ssid_len, ie, ie_len, use_mfp,
4933                                           &crypto, flags, ht_capa,
4934                                           ht_capa_mask);
4935
4936         return err;
4937 }
4938
4939 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4940 {
4941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4942         struct net_device *dev = info->user_ptr[1];
4943         const u8 *ie = NULL, *bssid;
4944         int ie_len = 0;
4945         u16 reason_code;
4946         bool local_state_change;
4947
4948         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4949                 return -EINVAL;
4950
4951         if (!info->attrs[NL80211_ATTR_MAC])
4952                 return -EINVAL;
4953
4954         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4955                 return -EINVAL;
4956
4957         if (!rdev->ops->deauth)
4958                 return -EOPNOTSUPP;
4959
4960         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4961             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4962                 return -EOPNOTSUPP;
4963
4964         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4965
4966         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4967         if (reason_code == 0) {
4968                 /* Reason Code 0 is reserved */
4969                 return -EINVAL;
4970         }
4971
4972         if (info->attrs[NL80211_ATTR_IE]) {
4973                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4974                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4975         }
4976
4977         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4978
4979         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4980                                     local_state_change);
4981 }
4982
4983 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4984 {
4985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4986         struct net_device *dev = info->user_ptr[1];
4987         const u8 *ie = NULL, *bssid;
4988         int ie_len = 0;
4989         u16 reason_code;
4990         bool local_state_change;
4991
4992         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4993                 return -EINVAL;
4994
4995         if (!info->attrs[NL80211_ATTR_MAC])
4996                 return -EINVAL;
4997
4998         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4999                 return -EINVAL;
5000
5001         if (!rdev->ops->disassoc)
5002                 return -EOPNOTSUPP;
5003
5004         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5005             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5006                 return -EOPNOTSUPP;
5007
5008         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5009
5010         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5011         if (reason_code == 0) {
5012                 /* Reason Code 0 is reserved */
5013                 return -EINVAL;
5014         }
5015
5016         if (info->attrs[NL80211_ATTR_IE]) {
5017                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5018                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5019         }
5020
5021         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5022
5023         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5024                                       local_state_change);
5025 }
5026
5027 static bool
5028 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5029                          int mcast_rate[IEEE80211_NUM_BANDS],
5030                          int rateval)
5031 {
5032         struct wiphy *wiphy = &rdev->wiphy;
5033         bool found = false;
5034         int band, i;
5035
5036         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5037                 struct ieee80211_supported_band *sband;
5038
5039                 sband = wiphy->bands[band];
5040                 if (!sband)
5041                         continue;
5042
5043                 for (i = 0; i < sband->n_bitrates; i++) {
5044                         if (sband->bitrates[i].bitrate == rateval) {
5045                                 mcast_rate[band] = i + 1;
5046                                 found = true;
5047                                 break;
5048                         }
5049                 }
5050         }
5051
5052         return found;
5053 }
5054
5055 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5056 {
5057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5058         struct net_device *dev = info->user_ptr[1];
5059         struct cfg80211_ibss_params ibss;
5060         struct wiphy *wiphy;
5061         struct cfg80211_cached_keys *connkeys = NULL;
5062         int err;
5063
5064         memset(&ibss, 0, sizeof(ibss));
5065
5066         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5067                 return -EINVAL;
5068
5069         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5070             !info->attrs[NL80211_ATTR_SSID] ||
5071             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5072                 return -EINVAL;
5073
5074         ibss.beacon_interval = 100;
5075
5076         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5077                 ibss.beacon_interval =
5078                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5079                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5080                         return -EINVAL;
5081         }
5082
5083         if (!rdev->ops->join_ibss)
5084                 return -EOPNOTSUPP;
5085
5086         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5087                 return -EOPNOTSUPP;
5088
5089         wiphy = &rdev->wiphy;
5090
5091         if (info->attrs[NL80211_ATTR_MAC]) {
5092                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5093
5094                 if (!is_valid_ether_addr(ibss.bssid))
5095                         return -EINVAL;
5096         }
5097         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5098         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5099
5100         if (info->attrs[NL80211_ATTR_IE]) {
5101                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5102                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5103         }
5104
5105         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5106                 enum nl80211_channel_type channel_type;
5107
5108                 if (!nl80211_valid_channel_type(info, &channel_type))
5109                         return -EINVAL;
5110
5111                 if (channel_type != NL80211_CHAN_NO_HT &&
5112                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5113                         return -EINVAL;
5114
5115                 ibss.channel_type = channel_type;
5116         } else {
5117                 ibss.channel_type = NL80211_CHAN_NO_HT;
5118         }
5119
5120         ibss.channel = rdev_freq_to_chan(rdev,
5121                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5122                 ibss.channel_type);
5123         if (!ibss.channel ||
5124             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5125             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5126                 return -EINVAL;
5127
5128         /* Both channels should be able to initiate communication */
5129         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5130              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5131             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5132                                           ibss.channel_type))
5133                 return -EINVAL;
5134
5135         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5136         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5137
5138         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5139                 u8 *rates =
5140                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5141                 int n_rates =
5142                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5143                 struct ieee80211_supported_band *sband =
5144                         wiphy->bands[ibss.channel->band];
5145
5146                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5147                                              &ibss.basic_rates);
5148                 if (err)
5149                         return err;
5150         }
5151
5152         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5153             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5154                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5155                 return -EINVAL;
5156
5157         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5158                 connkeys = nl80211_parse_connkeys(rdev,
5159                                         info->attrs[NL80211_ATTR_KEYS]);
5160                 if (IS_ERR(connkeys))
5161                         return PTR_ERR(connkeys);
5162         }
5163
5164         ibss.control_port =
5165                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5166
5167         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5168         if (err)
5169                 kfree(connkeys);
5170         return err;
5171 }
5172
5173 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5174 {
5175         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5176         struct net_device *dev = info->user_ptr[1];
5177
5178         if (!rdev->ops->leave_ibss)
5179                 return -EOPNOTSUPP;
5180
5181         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5182                 return -EOPNOTSUPP;
5183
5184         return cfg80211_leave_ibss(rdev, dev, false);
5185 }
5186
5187 #ifdef CONFIG_NL80211_TESTMODE
5188 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5189         .name = "testmode",
5190 };
5191
5192 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5193 {
5194         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5195         int err;
5196
5197         if (!info->attrs[NL80211_ATTR_TESTDATA])
5198                 return -EINVAL;
5199
5200         err = -EOPNOTSUPP;
5201         if (rdev->ops->testmode_cmd) {
5202                 rdev->testmode_info = info;
5203                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5204                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5205                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5206                 rdev->testmode_info = NULL;
5207         }
5208
5209         return err;
5210 }
5211
5212 static int nl80211_testmode_dump(struct sk_buff *skb,
5213                                  struct netlink_callback *cb)
5214 {
5215         struct cfg80211_registered_device *rdev;
5216         int err;
5217         long phy_idx;
5218         void *data = NULL;
5219         int data_len = 0;
5220
5221         if (cb->args[0]) {
5222                 /*
5223                  * 0 is a valid index, but not valid for args[0],
5224                  * so we need to offset by 1.
5225                  */
5226                 phy_idx = cb->args[0] - 1;
5227         } else {
5228                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5229                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5230                                   nl80211_policy);
5231                 if (err)
5232                         return err;
5233                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
5234                         phy_idx = nla_get_u32(
5235                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
5236                 } else {
5237                         struct net_device *netdev;
5238
5239                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
5240                                                       nl80211_fam.attrbuf,
5241                                                       &rdev, &netdev);
5242                         if (err)
5243                                 return err;
5244                         dev_put(netdev);
5245                         phy_idx = rdev->wiphy_idx;
5246                         cfg80211_unlock_rdev(rdev);
5247                 }
5248                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5249                         cb->args[1] =
5250                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5251         }
5252
5253         if (cb->args[1]) {
5254                 data = nla_data((void *)cb->args[1]);
5255                 data_len = nla_len((void *)cb->args[1]);
5256         }
5257
5258         mutex_lock(&cfg80211_mutex);
5259         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5260         if (!rdev) {
5261                 mutex_unlock(&cfg80211_mutex);
5262                 return -ENOENT;
5263         }
5264         cfg80211_lock_rdev(rdev);
5265         mutex_unlock(&cfg80211_mutex);
5266
5267         if (!rdev->ops->testmode_dump) {
5268                 err = -EOPNOTSUPP;
5269                 goto out_err;
5270         }
5271
5272         while (1) {
5273                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5274                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5275                                            NL80211_CMD_TESTMODE);
5276                 struct nlattr *tmdata;
5277
5278                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5279                         genlmsg_cancel(skb, hdr);
5280                         break;
5281                 }
5282
5283                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5284                 if (!tmdata) {
5285                         genlmsg_cancel(skb, hdr);
5286                         break;
5287                 }
5288                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5289                                                data, data_len);
5290                 nla_nest_end(skb, tmdata);
5291
5292                 if (err == -ENOBUFS || err == -ENOENT) {
5293                         genlmsg_cancel(skb, hdr);
5294                         break;
5295                 } else if (err) {
5296                         genlmsg_cancel(skb, hdr);
5297                         goto out_err;
5298                 }
5299
5300                 genlmsg_end(skb, hdr);
5301         }
5302
5303         err = skb->len;
5304         /* see above */
5305         cb->args[0] = phy_idx + 1;
5306  out_err:
5307         cfg80211_unlock_rdev(rdev);
5308         return err;
5309 }
5310
5311 static struct sk_buff *
5312 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5313                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5314 {
5315         struct sk_buff *skb;
5316         void *hdr;
5317         struct nlattr *data;
5318
5319         skb = nlmsg_new(approxlen + 100, gfp);
5320         if (!skb)
5321                 return NULL;
5322
5323         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5324         if (!hdr) {
5325                 kfree_skb(skb);
5326                 return NULL;
5327         }
5328
5329         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5330                 goto nla_put_failure;
5331         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5332
5333         ((void **)skb->cb)[0] = rdev;
5334         ((void **)skb->cb)[1] = hdr;
5335         ((void **)skb->cb)[2] = data;
5336
5337         return skb;
5338
5339  nla_put_failure:
5340         kfree_skb(skb);
5341         return NULL;
5342 }
5343
5344 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5345                                                   int approxlen)
5346 {
5347         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5348
5349         if (WARN_ON(!rdev->testmode_info))
5350                 return NULL;
5351
5352         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5353                                 rdev->testmode_info->snd_pid,
5354                                 rdev->testmode_info->snd_seq,
5355                                 GFP_KERNEL);
5356 }
5357 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5358
5359 int cfg80211_testmode_reply(struct sk_buff *skb)
5360 {
5361         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5362         void *hdr = ((void **)skb->cb)[1];
5363         struct nlattr *data = ((void **)skb->cb)[2];
5364
5365         if (WARN_ON(!rdev->testmode_info)) {
5366                 kfree_skb(skb);
5367                 return -EINVAL;
5368         }
5369
5370         nla_nest_end(skb, data);
5371         genlmsg_end(skb, hdr);
5372         return genlmsg_reply(skb, rdev->testmode_info);
5373 }
5374 EXPORT_SYMBOL(cfg80211_testmode_reply);
5375
5376 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5377                                                   int approxlen, gfp_t gfp)
5378 {
5379         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5380
5381         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5382 }
5383 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5384
5385 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5386 {
5387         void *hdr = ((void **)skb->cb)[1];
5388         struct nlattr *data = ((void **)skb->cb)[2];
5389
5390         nla_nest_end(skb, data);
5391         genlmsg_end(skb, hdr);
5392         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5393 }
5394 EXPORT_SYMBOL(cfg80211_testmode_event);
5395 #endif
5396
5397 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5398 {
5399         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5400         struct net_device *dev = info->user_ptr[1];
5401         struct cfg80211_connect_params connect;
5402         struct wiphy *wiphy;
5403         struct cfg80211_cached_keys *connkeys = NULL;
5404         int err;
5405
5406         memset(&connect, 0, sizeof(connect));
5407
5408         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5409                 return -EINVAL;
5410
5411         if (!info->attrs[NL80211_ATTR_SSID] ||
5412             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5413                 return -EINVAL;
5414
5415         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5416                 connect.auth_type =
5417                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5418                 if (!nl80211_valid_auth_type(connect.auth_type))
5419                         return -EINVAL;
5420         } else
5421                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5422
5423         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5424
5425         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5426                                       NL80211_MAX_NR_CIPHER_SUITES);
5427         if (err)
5428                 return err;
5429
5430         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5431             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5432                 return -EOPNOTSUPP;
5433
5434         wiphy = &rdev->wiphy;
5435
5436         connect.bg_scan_period = -1;
5437         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5438                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5439                 connect.bg_scan_period =
5440                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5441         }
5442
5443         if (info->attrs[NL80211_ATTR_MAC])
5444                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5445         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5446         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5447
5448         if (info->attrs[NL80211_ATTR_IE]) {
5449                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5450                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5451         }
5452
5453         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5454                 connect.channel =
5455                         ieee80211_get_channel(wiphy,
5456                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5457                 if (!connect.channel ||
5458                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5459                         return -EINVAL;
5460         }
5461
5462         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5463                 connkeys = nl80211_parse_connkeys(rdev,
5464                                         info->attrs[NL80211_ATTR_KEYS]);
5465                 if (IS_ERR(connkeys))
5466                         return PTR_ERR(connkeys);
5467         }
5468
5469         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5470                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5471
5472         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5473                 memcpy(&connect.ht_capa_mask,
5474                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5475                        sizeof(connect.ht_capa_mask));
5476
5477         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5478                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5479                         return -EINVAL;
5480                 memcpy(&connect.ht_capa,
5481                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5482                        sizeof(connect.ht_capa));
5483         }
5484
5485         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5486         if (err)
5487                 kfree(connkeys);
5488         return err;
5489 }
5490
5491 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5492 {
5493         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5494         struct net_device *dev = info->user_ptr[1];
5495         u16 reason;
5496
5497         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5498                 reason = WLAN_REASON_DEAUTH_LEAVING;
5499         else
5500                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5501
5502         if (reason == 0)
5503                 return -EINVAL;
5504
5505         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5506             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5507                 return -EOPNOTSUPP;
5508
5509         return cfg80211_disconnect(rdev, dev, reason, true);
5510 }
5511
5512 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5513 {
5514         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5515         struct net *net;
5516         int err;
5517         u32 pid;
5518
5519         if (!info->attrs[NL80211_ATTR_PID])
5520                 return -EINVAL;
5521
5522         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5523
5524         net = get_net_ns_by_pid(pid);
5525         if (IS_ERR(net))
5526                 return PTR_ERR(net);
5527
5528         err = 0;
5529
5530         /* check if anything to do */
5531         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5532                 err = cfg80211_switch_netns(rdev, net);
5533
5534         put_net(net);
5535         return err;
5536 }
5537
5538 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5539 {
5540         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5541         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5542                         struct cfg80211_pmksa *pmksa) = NULL;
5543         struct net_device *dev = info->user_ptr[1];
5544         struct cfg80211_pmksa pmksa;
5545
5546         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5547
5548         if (!info->attrs[NL80211_ATTR_MAC])
5549                 return -EINVAL;
5550
5551         if (!info->attrs[NL80211_ATTR_PMKID])
5552                 return -EINVAL;
5553
5554         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5555         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5556
5557         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5558             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5559                 return -EOPNOTSUPP;
5560
5561         switch (info->genlhdr->cmd) {
5562         case NL80211_CMD_SET_PMKSA:
5563                 rdev_ops = rdev->ops->set_pmksa;
5564                 break;
5565         case NL80211_CMD_DEL_PMKSA:
5566                 rdev_ops = rdev->ops->del_pmksa;
5567                 break;
5568         default:
5569                 WARN_ON(1);
5570                 break;
5571         }
5572
5573         if (!rdev_ops)
5574                 return -EOPNOTSUPP;
5575
5576         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5577 }
5578
5579 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5580 {
5581         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5582         struct net_device *dev = info->user_ptr[1];
5583
5584         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5585             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5586                 return -EOPNOTSUPP;
5587
5588         if (!rdev->ops->flush_pmksa)
5589                 return -EOPNOTSUPP;
5590
5591         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5592 }
5593
5594 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5595 {
5596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5597         struct net_device *dev = info->user_ptr[1];
5598         u8 action_code, dialog_token;
5599         u16 status_code;
5600         u8 *peer;
5601
5602         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5603             !rdev->ops->tdls_mgmt)
5604                 return -EOPNOTSUPP;
5605
5606         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5607             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5608             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5609             !info->attrs[NL80211_ATTR_IE] ||
5610             !info->attrs[NL80211_ATTR_MAC])
5611                 return -EINVAL;
5612
5613         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5614         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5615         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5616         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5617
5618         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5619                                     dialog_token, status_code,
5620                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5621                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5622 }
5623
5624 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5625 {
5626         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5627         struct net_device *dev = info->user_ptr[1];
5628         enum nl80211_tdls_operation operation;
5629         u8 *peer;
5630
5631         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5632             !rdev->ops->tdls_oper)
5633                 return -EOPNOTSUPP;
5634
5635         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5636             !info->attrs[NL80211_ATTR_MAC])
5637                 return -EINVAL;
5638
5639         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5640         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5641
5642         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5643 }
5644
5645 static int nl80211_remain_on_channel(struct sk_buff *skb,
5646                                      struct genl_info *info)
5647 {
5648         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5649         struct net_device *dev = info->user_ptr[1];
5650         struct ieee80211_channel *chan;
5651         struct sk_buff *msg;
5652         void *hdr;
5653         u64 cookie;
5654         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5655         u32 freq, duration;
5656         int err;
5657
5658         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5659             !info->attrs[NL80211_ATTR_DURATION])
5660                 return -EINVAL;
5661
5662         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5663
5664         if (!rdev->ops->remain_on_channel ||
5665             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5666                 return -EOPNOTSUPP;
5667
5668         /*
5669          * We should be on that channel for at least a minimum amount of
5670          * time (10ms) but no longer than the driver supports.
5671          */
5672         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5673             duration > rdev->wiphy.max_remain_on_channel_duration)
5674                 return -EINVAL;
5675
5676         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5677             !nl80211_valid_channel_type(info, &channel_type))
5678                 return -EINVAL;
5679
5680         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5681         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5682         if (chan == NULL)
5683                 return -EINVAL;
5684
5685         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5686         if (!msg)
5687                 return -ENOMEM;
5688
5689         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5690                              NL80211_CMD_REMAIN_ON_CHANNEL);
5691
5692         if (IS_ERR(hdr)) {
5693                 err = PTR_ERR(hdr);
5694                 goto free_msg;
5695         }
5696
5697         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5698                                            channel_type, duration, &cookie);
5699
5700         if (err)
5701                 goto free_msg;
5702
5703         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5704                 goto nla_put_failure;
5705
5706         genlmsg_end(msg, hdr);
5707
5708         return genlmsg_reply(msg, info);
5709
5710  nla_put_failure:
5711         err = -ENOBUFS;
5712  free_msg:
5713         nlmsg_free(msg);
5714         return err;
5715 }
5716
5717 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5718                                             struct genl_info *info)
5719 {
5720         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5721         struct net_device *dev = info->user_ptr[1];
5722         u64 cookie;
5723
5724         if (!info->attrs[NL80211_ATTR_COOKIE])
5725                 return -EINVAL;
5726
5727         if (!rdev->ops->cancel_remain_on_channel)
5728                 return -EOPNOTSUPP;
5729
5730         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5731
5732         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5733 }
5734
5735 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5736                            u8 *rates, u8 rates_len)
5737 {
5738         u8 i;
5739         u32 mask = 0;
5740
5741         for (i = 0; i < rates_len; i++) {
5742                 int rate = (rates[i] & 0x7f) * 5;
5743                 int ridx;
5744                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5745                         struct ieee80211_rate *srate =
5746                                 &sband->bitrates[ridx];
5747                         if (rate == srate->bitrate) {
5748                                 mask |= 1 << ridx;
5749                                 break;
5750                         }
5751                 }
5752                 if (ridx == sband->n_bitrates)
5753                         return 0; /* rate not found */
5754         }
5755
5756         return mask;
5757 }
5758
5759 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5760                                u8 *rates, u8 rates_len,
5761                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5762 {
5763         u8 i;
5764
5765         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5766
5767         for (i = 0; i < rates_len; i++) {
5768                 int ridx, rbit;
5769
5770                 ridx = rates[i] / 8;
5771                 rbit = BIT(rates[i] % 8);
5772
5773                 /* check validity */
5774                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5775                         return false;
5776
5777                 /* check availability */
5778                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5779                         mcs[ridx] |= rbit;
5780                 else
5781                         return false;
5782         }
5783
5784         return true;
5785 }
5786
5787 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5788         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5789                                     .len = NL80211_MAX_SUPP_RATES },
5790         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5791                                  .len = NL80211_MAX_SUPP_HT_RATES },
5792 };
5793
5794 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5795                                        struct genl_info *info)
5796 {
5797         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5798         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5799         struct cfg80211_bitrate_mask mask;
5800         int rem, i;
5801         struct net_device *dev = info->user_ptr[1];
5802         struct nlattr *tx_rates;
5803         struct ieee80211_supported_band *sband;
5804
5805         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5806                 return -EINVAL;
5807
5808         if (!rdev->ops->set_bitrate_mask)
5809                 return -EOPNOTSUPP;
5810
5811         memset(&mask, 0, sizeof(mask));
5812         /* Default to all rates enabled */
5813         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5814                 sband = rdev->wiphy.bands[i];
5815                 mask.control[i].legacy =
5816                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5817                 if (sband)
5818                         memcpy(mask.control[i].mcs,
5819                                sband->ht_cap.mcs.rx_mask,
5820                                sizeof(mask.control[i].mcs));
5821                 else
5822                         memset(mask.control[i].mcs, 0,
5823                                sizeof(mask.control[i].mcs));
5824         }
5825
5826         /*
5827          * The nested attribute uses enum nl80211_band as the index. This maps
5828          * directly to the enum ieee80211_band values used in cfg80211.
5829          */
5830         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5831         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5832         {
5833                 enum ieee80211_band band = nla_type(tx_rates);
5834                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5835                         return -EINVAL;
5836                 sband = rdev->wiphy.bands[band];
5837                 if (sband == NULL)
5838                         return -EINVAL;
5839                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5840                           nla_len(tx_rates), nl80211_txattr_policy);
5841                 if (tb[NL80211_TXRATE_LEGACY]) {
5842                         mask.control[band].legacy = rateset_to_mask(
5843                                 sband,
5844                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5845                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5846                         if ((mask.control[band].legacy == 0) &&
5847                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5848                                 return -EINVAL;
5849                 }
5850                 if (tb[NL80211_TXRATE_MCS]) {
5851                         if (!ht_rateset_to_mask(
5852                                         sband,
5853                                         nla_data(tb[NL80211_TXRATE_MCS]),
5854                                         nla_len(tb[NL80211_TXRATE_MCS]),
5855                                         mask.control[band].mcs))
5856                                 return -EINVAL;
5857                 }
5858
5859                 if (mask.control[band].legacy == 0) {
5860                         /* don't allow empty legacy rates if HT
5861                          * is not even supported. */
5862                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5863                                 return -EINVAL;
5864
5865                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5866                                 if (mask.control[band].mcs[i])
5867                                         break;
5868
5869                         /* legacy and mcs rates may not be both empty */
5870                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5871                                 return -EINVAL;
5872                 }
5873         }
5874
5875         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5876 }
5877
5878 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5879 {
5880         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5881         struct net_device *dev = info->user_ptr[1];
5882         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5883
5884         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5885                 return -EINVAL;
5886
5887         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5888                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5889
5890         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5891             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5892             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5893             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5894             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5895             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5896             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5897                 return -EOPNOTSUPP;
5898
5899         /* not much point in registering if we can't reply */
5900         if (!rdev->ops->mgmt_tx)
5901                 return -EOPNOTSUPP;
5902
5903         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5904                         frame_type,
5905                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5906                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5907 }
5908
5909 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5910 {
5911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5912         struct net_device *dev = info->user_ptr[1];
5913         struct ieee80211_channel *chan;
5914         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5915         bool channel_type_valid = false;
5916         u32 freq;
5917         int err;
5918         void *hdr = NULL;
5919         u64 cookie;
5920         struct sk_buff *msg = NULL;
5921         unsigned int wait = 0;
5922         bool offchan, no_cck, dont_wait_for_ack;
5923
5924         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5925
5926         if (!info->attrs[NL80211_ATTR_FRAME] ||
5927             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5928                 return -EINVAL;
5929
5930         if (!rdev->ops->mgmt_tx)
5931                 return -EOPNOTSUPP;
5932
5933         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5934             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5935             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5936             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5937             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5938             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5939             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5940                 return -EOPNOTSUPP;
5941
5942         if (info->attrs[NL80211_ATTR_DURATION]) {
5943                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5944                         return -EINVAL;
5945                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5946
5947                 /*
5948                  * We should wait on the channel for at least a minimum amount
5949                  * of time (10ms) but no longer than the driver supports.
5950                  */
5951                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5952                     wait > rdev->wiphy.max_remain_on_channel_duration)
5953                         return -EINVAL;
5954
5955         }
5956
5957         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5958                 if (!nl80211_valid_channel_type(info, &channel_type))
5959                         return -EINVAL;
5960                 channel_type_valid = true;
5961         }
5962
5963         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5964
5965         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5966                 return -EINVAL;
5967
5968         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5969
5970         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5971         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5972         if (chan == NULL)
5973                 return -EINVAL;
5974
5975         if (!dont_wait_for_ack) {
5976                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5977                 if (!msg)
5978                         return -ENOMEM;
5979
5980                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5981                                      NL80211_CMD_FRAME);
5982
5983                 if (IS_ERR(hdr)) {
5984                         err = PTR_ERR(hdr);
5985                         goto free_msg;
5986                 }
5987         }
5988
5989         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5990                                     channel_type_valid, wait,
5991                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5992                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5993                                     no_cck, dont_wait_for_ack, &cookie);
5994         if (err)
5995                 goto free_msg;
5996
5997         if (msg) {
5998                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5999                         goto nla_put_failure;
6000
6001                 genlmsg_end(msg, hdr);
6002                 return genlmsg_reply(msg, info);
6003         }
6004
6005         return 0;
6006
6007  nla_put_failure:
6008         err = -ENOBUFS;
6009  free_msg:
6010         nlmsg_free(msg);
6011         return err;
6012 }
6013
6014 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6015 {
6016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6017         struct net_device *dev = info->user_ptr[1];
6018         u64 cookie;
6019
6020         if (!info->attrs[NL80211_ATTR_COOKIE])
6021                 return -EINVAL;
6022
6023         if (!rdev->ops->mgmt_tx_cancel_wait)
6024                 return -EOPNOTSUPP;
6025
6026         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6027             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6028             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6029             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6030             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6031             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6032                 return -EOPNOTSUPP;
6033
6034         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6035
6036         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6037 }
6038
6039 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6040 {
6041         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6042         struct wireless_dev *wdev;
6043         struct net_device *dev = info->user_ptr[1];
6044         u8 ps_state;
6045         bool state;
6046         int err;
6047
6048         if (!info->attrs[NL80211_ATTR_PS_STATE])
6049                 return -EINVAL;
6050
6051         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6052
6053         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6054                 return -EINVAL;
6055
6056         wdev = dev->ieee80211_ptr;
6057
6058         if (!rdev->ops->set_power_mgmt)
6059                 return -EOPNOTSUPP;
6060
6061         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6062
6063         if (state == wdev->ps)
6064                 return 0;
6065
6066         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6067                                         wdev->ps_timeout);
6068         if (!err)
6069                 wdev->ps = state;
6070         return err;
6071 }
6072
6073 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6074 {
6075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6076         enum nl80211_ps_state ps_state;
6077         struct wireless_dev *wdev;
6078         struct net_device *dev = info->user_ptr[1];
6079         struct sk_buff *msg;
6080         void *hdr;
6081         int err;
6082
6083         wdev = dev->ieee80211_ptr;
6084
6085         if (!rdev->ops->set_power_mgmt)
6086                 return -EOPNOTSUPP;
6087
6088         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6089         if (!msg)
6090                 return -ENOMEM;
6091
6092         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6093                              NL80211_CMD_GET_POWER_SAVE);
6094         if (!hdr) {
6095                 err = -ENOBUFS;
6096                 goto free_msg;
6097         }
6098
6099         if (wdev->ps)
6100                 ps_state = NL80211_PS_ENABLED;
6101         else
6102                 ps_state = NL80211_PS_DISABLED;
6103
6104         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6105                 goto nla_put_failure;
6106
6107         genlmsg_end(msg, hdr);
6108         return genlmsg_reply(msg, info);
6109
6110  nla_put_failure:
6111         err = -ENOBUFS;
6112  free_msg:
6113         nlmsg_free(msg);
6114         return err;
6115 }
6116
6117 static struct nla_policy
6118 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6119         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6120         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6121         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6122 };
6123
6124 static int nl80211_set_cqm_rssi(struct genl_info *info,
6125                                 s32 threshold, u32 hysteresis)
6126 {
6127         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6128         struct wireless_dev *wdev;
6129         struct net_device *dev = info->user_ptr[1];
6130
6131         if (threshold > 0)
6132                 return -EINVAL;
6133
6134         wdev = dev->ieee80211_ptr;
6135
6136         if (!rdev->ops->set_cqm_rssi_config)
6137                 return -EOPNOTSUPP;
6138
6139         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6140             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6141                 return -EOPNOTSUPP;
6142
6143         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6144                                               threshold, hysteresis);
6145 }
6146
6147 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6148 {
6149         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6150         struct nlattr *cqm;
6151         int err;
6152
6153         cqm = info->attrs[NL80211_ATTR_CQM];
6154         if (!cqm) {
6155                 err = -EINVAL;
6156                 goto out;
6157         }
6158
6159         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6160                                nl80211_attr_cqm_policy);
6161         if (err)
6162                 goto out;
6163
6164         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6165             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6166                 s32 threshold;
6167                 u32 hysteresis;
6168                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6169                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6170                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6171         } else
6172                 err = -EINVAL;
6173
6174 out:
6175         return err;
6176 }
6177
6178 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6179 {
6180         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6181         struct net_device *dev = info->user_ptr[1];
6182         struct mesh_config cfg;
6183         struct mesh_setup setup;
6184         int err;
6185
6186         /* start with default */
6187         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6188         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6189
6190         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6191                 /* and parse parameters if given */
6192                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6193                 if (err)
6194                         return err;
6195         }
6196
6197         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6198             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6199                 return -EINVAL;
6200
6201         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6202         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6203
6204         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6205             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6206                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6207                         return -EINVAL;
6208
6209         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6210                 /* parse additional setup parameters if given */
6211                 err = nl80211_parse_mesh_setup(info, &setup);
6212                 if (err)
6213                         return err;
6214         }
6215
6216         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6217                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6218
6219                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6220                     !nl80211_valid_channel_type(info, &channel_type))
6221                         return -EINVAL;
6222
6223                 setup.channel = rdev_freq_to_chan(rdev,
6224                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6225                         channel_type);
6226                 if (!setup.channel)
6227                         return -EINVAL;
6228                 setup.channel_type = channel_type;
6229         } else {
6230                 /* cfg80211_join_mesh() will sort it out */
6231                 setup.channel = NULL;
6232         }
6233
6234         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6235 }
6236
6237 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6238 {
6239         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6240         struct net_device *dev = info->user_ptr[1];
6241
6242         return cfg80211_leave_mesh(rdev, dev);
6243 }
6244
6245 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6246 {
6247         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6248         struct sk_buff *msg;
6249         void *hdr;
6250
6251         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6252                 return -EOPNOTSUPP;
6253
6254         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6255         if (!msg)
6256                 return -ENOMEM;
6257
6258         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6259                              NL80211_CMD_GET_WOWLAN);
6260         if (!hdr)
6261                 goto nla_put_failure;
6262
6263         if (rdev->wowlan) {
6264                 struct nlattr *nl_wowlan;
6265
6266                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6267                 if (!nl_wowlan)
6268                         goto nla_put_failure;
6269
6270                 if ((rdev->wowlan->any &&
6271                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6272                     (rdev->wowlan->disconnect &&
6273                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6274                     (rdev->wowlan->magic_pkt &&
6275                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6276                     (rdev->wowlan->gtk_rekey_failure &&
6277                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6278                     (rdev->wowlan->eap_identity_req &&
6279                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6280                     (rdev->wowlan->four_way_handshake &&
6281                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6282                     (rdev->wowlan->rfkill_release &&
6283                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6284                         goto nla_put_failure;
6285                 if (rdev->wowlan->n_patterns) {
6286                         struct nlattr *nl_pats, *nl_pat;
6287                         int i, pat_len;
6288
6289                         nl_pats = nla_nest_start(msg,
6290                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6291                         if (!nl_pats)
6292                                 goto nla_put_failure;
6293
6294                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6295                                 nl_pat = nla_nest_start(msg, i + 1);
6296                                 if (!nl_pat)
6297                                         goto nla_put_failure;
6298                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6299                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6300                                             DIV_ROUND_UP(pat_len, 8),
6301                                             rdev->wowlan->patterns[i].mask) ||
6302                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6303                                             pat_len,
6304                                             rdev->wowlan->patterns[i].pattern))
6305                                         goto nla_put_failure;
6306                                 nla_nest_end(msg, nl_pat);
6307                         }
6308                         nla_nest_end(msg, nl_pats);
6309                 }
6310
6311                 nla_nest_end(msg, nl_wowlan);
6312         }
6313
6314         genlmsg_end(msg, hdr);
6315         return genlmsg_reply(msg, info);
6316
6317 nla_put_failure:
6318         nlmsg_free(msg);
6319         return -ENOBUFS;
6320 }
6321
6322 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6323 {
6324         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6325         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6326         struct cfg80211_wowlan no_triggers = {};
6327         struct cfg80211_wowlan new_triggers = {};
6328         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6329         int err, i;
6330         bool prev_enabled = rdev->wowlan;
6331
6332         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6333                 return -EOPNOTSUPP;
6334
6335         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6336                 goto no_triggers;
6337
6338         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6339                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6340                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6341                         nl80211_wowlan_policy);
6342         if (err)
6343                 return err;
6344
6345         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6346                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6347                         return -EINVAL;
6348                 new_triggers.any = true;
6349         }
6350
6351         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6352                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6353                         return -EINVAL;
6354                 new_triggers.disconnect = true;
6355         }
6356
6357         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6358                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6359                         return -EINVAL;
6360                 new_triggers.magic_pkt = true;
6361         }
6362
6363         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6364                 return -EINVAL;
6365
6366         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6367                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6368                         return -EINVAL;
6369                 new_triggers.gtk_rekey_failure = true;
6370         }
6371
6372         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6373                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6374                         return -EINVAL;
6375                 new_triggers.eap_identity_req = true;
6376         }
6377
6378         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6379                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6380                         return -EINVAL;
6381                 new_triggers.four_way_handshake = true;
6382         }
6383
6384         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6385                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6386                         return -EINVAL;
6387                 new_triggers.rfkill_release = true;
6388         }
6389
6390         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6391                 struct nlattr *pat;
6392                 int n_patterns = 0;
6393                 int rem, pat_len, mask_len;
6394                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6395
6396                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6397                                     rem)
6398                         n_patterns++;
6399                 if (n_patterns > wowlan->n_patterns)
6400                         return -EINVAL;
6401
6402                 new_triggers.patterns = kcalloc(n_patterns,
6403                                                 sizeof(new_triggers.patterns[0]),
6404                                                 GFP_KERNEL);
6405                 if (!new_triggers.patterns)
6406                         return -ENOMEM;
6407
6408                 new_triggers.n_patterns = n_patterns;
6409                 i = 0;
6410
6411                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6412                                     rem) {
6413                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6414                                   nla_data(pat), nla_len(pat), NULL);
6415                         err = -EINVAL;
6416                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6417                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6418                                 goto error;
6419                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6420                         mask_len = DIV_ROUND_UP(pat_len, 8);
6421                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6422                             mask_len)
6423                                 goto error;
6424                         if (pat_len > wowlan->pattern_max_len ||
6425                             pat_len < wowlan->pattern_min_len)
6426                                 goto error;
6427
6428                         new_triggers.patterns[i].mask =
6429                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6430                         if (!new_triggers.patterns[i].mask) {
6431                                 err = -ENOMEM;
6432                                 goto error;
6433                         }
6434                         new_triggers.patterns[i].pattern =
6435                                 new_triggers.patterns[i].mask + mask_len;
6436                         memcpy(new_triggers.patterns[i].mask,
6437                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6438                                mask_len);
6439                         new_triggers.patterns[i].pattern_len = pat_len;
6440                         memcpy(new_triggers.patterns[i].pattern,
6441                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6442                                pat_len);
6443                         i++;
6444                 }
6445         }
6446
6447         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6448                 struct cfg80211_wowlan *ntrig;
6449                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6450                                 GFP_KERNEL);
6451                 if (!ntrig) {
6452                         err = -ENOMEM;
6453                         goto error;
6454                 }
6455                 cfg80211_rdev_free_wowlan(rdev);
6456                 rdev->wowlan = ntrig;
6457         } else {
6458  no_triggers:
6459                 cfg80211_rdev_free_wowlan(rdev);
6460                 rdev->wowlan = NULL;
6461         }
6462
6463         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6464                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6465
6466         return 0;
6467  error:
6468         for (i = 0; i < new_triggers.n_patterns; i++)
6469                 kfree(new_triggers.patterns[i].mask);
6470         kfree(new_triggers.patterns);
6471         return err;
6472 }
6473
6474 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6475 {
6476         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6477         struct net_device *dev = info->user_ptr[1];
6478         struct wireless_dev *wdev = dev->ieee80211_ptr;
6479         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6480         struct cfg80211_gtk_rekey_data rekey_data;
6481         int err;
6482
6483         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6484                 return -EINVAL;
6485
6486         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6487                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6488                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6489                         nl80211_rekey_policy);
6490         if (err)
6491                 return err;
6492
6493         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6494                 return -ERANGE;
6495         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6496                 return -ERANGE;
6497         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6498                 return -ERANGE;
6499
6500         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6501                NL80211_KEK_LEN);
6502         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6503                NL80211_KCK_LEN);
6504         memcpy(rekey_data.replay_ctr,
6505                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6506                NL80211_REPLAY_CTR_LEN);
6507
6508         wdev_lock(wdev);
6509         if (!wdev->current_bss) {
6510                 err = -ENOTCONN;
6511                 goto out;
6512         }
6513
6514         if (!rdev->ops->set_rekey_data) {
6515                 err = -EOPNOTSUPP;
6516                 goto out;
6517         }
6518
6519         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6520  out:
6521         wdev_unlock(wdev);
6522         return err;
6523 }
6524
6525 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6526                                              struct genl_info *info)
6527 {
6528         struct net_device *dev = info->user_ptr[1];
6529         struct wireless_dev *wdev = dev->ieee80211_ptr;
6530
6531         if (wdev->iftype != NL80211_IFTYPE_AP &&
6532             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6533                 return -EINVAL;
6534
6535         if (wdev->ap_unexpected_nlpid)
6536                 return -EBUSY;
6537
6538         wdev->ap_unexpected_nlpid = info->snd_pid;
6539         return 0;
6540 }
6541
6542 static int nl80211_probe_client(struct sk_buff *skb,
6543                                 struct genl_info *info)
6544 {
6545         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6546         struct net_device *dev = info->user_ptr[1];
6547         struct wireless_dev *wdev = dev->ieee80211_ptr;
6548         struct sk_buff *msg;
6549         void *hdr;
6550         const u8 *addr;
6551         u64 cookie;
6552         int err;
6553
6554         if (wdev->iftype != NL80211_IFTYPE_AP &&
6555             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6556                 return -EOPNOTSUPP;
6557
6558         if (!info->attrs[NL80211_ATTR_MAC])
6559                 return -EINVAL;
6560
6561         if (!rdev->ops->probe_client)
6562                 return -EOPNOTSUPP;
6563
6564         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6565         if (!msg)
6566                 return -ENOMEM;
6567
6568         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6569                              NL80211_CMD_PROBE_CLIENT);
6570
6571         if (IS_ERR(hdr)) {
6572                 err = PTR_ERR(hdr);
6573                 goto free_msg;
6574         }
6575
6576         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6577
6578         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6579         if (err)
6580                 goto free_msg;
6581
6582         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6583                 goto nla_put_failure;
6584
6585         genlmsg_end(msg, hdr);
6586
6587         return genlmsg_reply(msg, info);
6588
6589  nla_put_failure:
6590         err = -ENOBUFS;
6591  free_msg:
6592         nlmsg_free(msg);
6593         return err;
6594 }
6595
6596 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6597 {
6598         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6599
6600         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6601                 return -EOPNOTSUPP;
6602
6603         if (rdev->ap_beacons_nlpid)
6604                 return -EBUSY;
6605
6606         rdev->ap_beacons_nlpid = info->snd_pid;
6607
6608         return 0;
6609 }
6610
6611 #define NL80211_FLAG_NEED_WIPHY         0x01
6612 #define NL80211_FLAG_NEED_NETDEV        0x02
6613 #define NL80211_FLAG_NEED_RTNL          0x04
6614 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6615 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6616                                          NL80211_FLAG_CHECK_NETDEV_UP)
6617
6618 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6619                             struct genl_info *info)
6620 {
6621         struct cfg80211_registered_device *rdev;
6622         struct net_device *dev;
6623         int err;
6624         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6625
6626         if (rtnl)
6627                 rtnl_lock();
6628
6629         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6630                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6631                 if (IS_ERR(rdev)) {
6632                         if (rtnl)
6633                                 rtnl_unlock();
6634                         return PTR_ERR(rdev);
6635                 }
6636                 info->user_ptr[0] = rdev;
6637         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6638                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6639                                               &rdev, &dev);
6640                 if (err) {
6641                         if (rtnl)
6642                                 rtnl_unlock();
6643                         return err;
6644                 }
6645                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6646                     !netif_running(dev)) {
6647                         cfg80211_unlock_rdev(rdev);
6648                         dev_put(dev);
6649                         if (rtnl)
6650                                 rtnl_unlock();
6651                         return -ENETDOWN;
6652                 }
6653                 info->user_ptr[0] = rdev;
6654                 info->user_ptr[1] = dev;
6655         }
6656
6657         return 0;
6658 }
6659
6660 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6661                               struct genl_info *info)
6662 {
6663         if (info->user_ptr[0])
6664                 cfg80211_unlock_rdev(info->user_ptr[0]);
6665         if (info->user_ptr[1])
6666                 dev_put(info->user_ptr[1]);
6667         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6668                 rtnl_unlock();
6669 }
6670
6671 static struct genl_ops nl80211_ops[] = {
6672         {
6673                 .cmd = NL80211_CMD_GET_WIPHY,
6674                 .doit = nl80211_get_wiphy,
6675                 .dumpit = nl80211_dump_wiphy,
6676                 .policy = nl80211_policy,
6677                 /* can be retrieved by unprivileged users */
6678                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6679         },
6680         {
6681                 .cmd = NL80211_CMD_SET_WIPHY,
6682                 .doit = nl80211_set_wiphy,
6683                 .policy = nl80211_policy,
6684                 .flags = GENL_ADMIN_PERM,
6685                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6686         },
6687         {
6688                 .cmd = NL80211_CMD_GET_INTERFACE,
6689                 .doit = nl80211_get_interface,
6690                 .dumpit = nl80211_dump_interface,
6691                 .policy = nl80211_policy,
6692                 /* can be retrieved by unprivileged users */
6693                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6694         },
6695         {
6696                 .cmd = NL80211_CMD_SET_INTERFACE,
6697                 .doit = nl80211_set_interface,
6698                 .policy = nl80211_policy,
6699                 .flags = GENL_ADMIN_PERM,
6700                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6701                                   NL80211_FLAG_NEED_RTNL,
6702         },
6703         {
6704                 .cmd = NL80211_CMD_NEW_INTERFACE,
6705                 .doit = nl80211_new_interface,
6706                 .policy = nl80211_policy,
6707                 .flags = GENL_ADMIN_PERM,
6708                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6709                                   NL80211_FLAG_NEED_RTNL,
6710         },
6711         {
6712                 .cmd = NL80211_CMD_DEL_INTERFACE,
6713                 .doit = nl80211_del_interface,
6714                 .policy = nl80211_policy,
6715                 .flags = GENL_ADMIN_PERM,
6716                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6717                                   NL80211_FLAG_NEED_RTNL,
6718         },
6719         {
6720                 .cmd = NL80211_CMD_GET_KEY,
6721                 .doit = nl80211_get_key,
6722                 .policy = nl80211_policy,
6723                 .flags = GENL_ADMIN_PERM,
6724                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6725                                   NL80211_FLAG_NEED_RTNL,
6726         },
6727         {
6728                 .cmd = NL80211_CMD_SET_KEY,
6729                 .doit = nl80211_set_key,
6730                 .policy = nl80211_policy,
6731                 .flags = GENL_ADMIN_PERM,
6732                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6733                                   NL80211_FLAG_NEED_RTNL,
6734         },
6735         {
6736                 .cmd = NL80211_CMD_NEW_KEY,
6737                 .doit = nl80211_new_key,
6738                 .policy = nl80211_policy,
6739                 .flags = GENL_ADMIN_PERM,
6740                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6741                                   NL80211_FLAG_NEED_RTNL,
6742         },
6743         {
6744                 .cmd = NL80211_CMD_DEL_KEY,
6745                 .doit = nl80211_del_key,
6746                 .policy = nl80211_policy,
6747                 .flags = GENL_ADMIN_PERM,
6748                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6749                                   NL80211_FLAG_NEED_RTNL,
6750         },
6751         {
6752                 .cmd = NL80211_CMD_SET_BEACON,
6753                 .policy = nl80211_policy,
6754                 .flags = GENL_ADMIN_PERM,
6755                 .doit = nl80211_set_beacon,
6756                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6757                                   NL80211_FLAG_NEED_RTNL,
6758         },
6759         {
6760                 .cmd = NL80211_CMD_START_AP,
6761                 .policy = nl80211_policy,
6762                 .flags = GENL_ADMIN_PERM,
6763                 .doit = nl80211_start_ap,
6764                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6765                                   NL80211_FLAG_NEED_RTNL,
6766         },
6767         {
6768                 .cmd = NL80211_CMD_STOP_AP,
6769                 .policy = nl80211_policy,
6770                 .flags = GENL_ADMIN_PERM,
6771                 .doit = nl80211_stop_ap,
6772                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6773                                   NL80211_FLAG_NEED_RTNL,
6774         },
6775         {
6776                 .cmd = NL80211_CMD_GET_STATION,
6777                 .doit = nl80211_get_station,
6778                 .dumpit = nl80211_dump_station,
6779                 .policy = nl80211_policy,
6780                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6781                                   NL80211_FLAG_NEED_RTNL,
6782         },
6783         {
6784                 .cmd = NL80211_CMD_SET_STATION,
6785                 .doit = nl80211_set_station,
6786                 .policy = nl80211_policy,
6787                 .flags = GENL_ADMIN_PERM,
6788                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6789                                   NL80211_FLAG_NEED_RTNL,
6790         },
6791         {
6792                 .cmd = NL80211_CMD_NEW_STATION,
6793                 .doit = nl80211_new_station,
6794                 .policy = nl80211_policy,
6795                 .flags = GENL_ADMIN_PERM,
6796                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6797                                   NL80211_FLAG_NEED_RTNL,
6798         },
6799         {
6800                 .cmd = NL80211_CMD_DEL_STATION,
6801                 .doit = nl80211_del_station,
6802                 .policy = nl80211_policy,
6803                 .flags = GENL_ADMIN_PERM,
6804                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6805                                   NL80211_FLAG_NEED_RTNL,
6806         },
6807         {
6808                 .cmd = NL80211_CMD_GET_MPATH,
6809                 .doit = nl80211_get_mpath,
6810                 .dumpit = nl80211_dump_mpath,
6811                 .policy = nl80211_policy,
6812                 .flags = GENL_ADMIN_PERM,
6813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6814                                   NL80211_FLAG_NEED_RTNL,
6815         },
6816         {
6817                 .cmd = NL80211_CMD_SET_MPATH,
6818                 .doit = nl80211_set_mpath,
6819                 .policy = nl80211_policy,
6820                 .flags = GENL_ADMIN_PERM,
6821                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6822                                   NL80211_FLAG_NEED_RTNL,
6823         },
6824         {
6825                 .cmd = NL80211_CMD_NEW_MPATH,
6826                 .doit = nl80211_new_mpath,
6827                 .policy = nl80211_policy,
6828                 .flags = GENL_ADMIN_PERM,
6829                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6830                                   NL80211_FLAG_NEED_RTNL,
6831         },
6832         {
6833                 .cmd = NL80211_CMD_DEL_MPATH,
6834                 .doit = nl80211_del_mpath,
6835                 .policy = nl80211_policy,
6836                 .flags = GENL_ADMIN_PERM,
6837                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6838                                   NL80211_FLAG_NEED_RTNL,
6839         },
6840         {
6841                 .cmd = NL80211_CMD_SET_BSS,
6842                 .doit = nl80211_set_bss,
6843                 .policy = nl80211_policy,
6844                 .flags = GENL_ADMIN_PERM,
6845                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6846                                   NL80211_FLAG_NEED_RTNL,
6847         },
6848         {
6849                 .cmd = NL80211_CMD_GET_REG,
6850                 .doit = nl80211_get_reg,
6851                 .policy = nl80211_policy,
6852                 /* can be retrieved by unprivileged users */
6853         },
6854         {
6855                 .cmd = NL80211_CMD_SET_REG,
6856                 .doit = nl80211_set_reg,
6857                 .policy = nl80211_policy,
6858                 .flags = GENL_ADMIN_PERM,
6859         },
6860         {
6861                 .cmd = NL80211_CMD_REQ_SET_REG,
6862                 .doit = nl80211_req_set_reg,
6863                 .policy = nl80211_policy,
6864                 .flags = GENL_ADMIN_PERM,
6865         },
6866         {
6867                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6868                 .doit = nl80211_get_mesh_config,
6869                 .policy = nl80211_policy,
6870                 /* can be retrieved by unprivileged users */
6871                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6872                                   NL80211_FLAG_NEED_RTNL,
6873         },
6874         {
6875                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6876                 .doit = nl80211_update_mesh_config,
6877                 .policy = nl80211_policy,
6878                 .flags = GENL_ADMIN_PERM,
6879                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6880                                   NL80211_FLAG_NEED_RTNL,
6881         },
6882         {
6883                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6884                 .doit = nl80211_trigger_scan,
6885                 .policy = nl80211_policy,
6886                 .flags = GENL_ADMIN_PERM,
6887                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6888                                   NL80211_FLAG_NEED_RTNL,
6889         },
6890         {
6891                 .cmd = NL80211_CMD_GET_SCAN,
6892                 .policy = nl80211_policy,
6893                 .dumpit = nl80211_dump_scan,
6894         },
6895         {
6896                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6897                 .doit = nl80211_start_sched_scan,
6898                 .policy = nl80211_policy,
6899                 .flags = GENL_ADMIN_PERM,
6900                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6901                                   NL80211_FLAG_NEED_RTNL,
6902         },
6903         {
6904                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6905                 .doit = nl80211_stop_sched_scan,
6906                 .policy = nl80211_policy,
6907                 .flags = GENL_ADMIN_PERM,
6908                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6909                                   NL80211_FLAG_NEED_RTNL,
6910         },
6911         {
6912                 .cmd = NL80211_CMD_AUTHENTICATE,
6913                 .doit = nl80211_authenticate,
6914                 .policy = nl80211_policy,
6915                 .flags = GENL_ADMIN_PERM,
6916                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6917                                   NL80211_FLAG_NEED_RTNL,
6918         },
6919         {
6920                 .cmd = NL80211_CMD_ASSOCIATE,
6921                 .doit = nl80211_associate,
6922                 .policy = nl80211_policy,
6923                 .flags = GENL_ADMIN_PERM,
6924                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6925                                   NL80211_FLAG_NEED_RTNL,
6926         },
6927         {
6928                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6929                 .doit = nl80211_deauthenticate,
6930                 .policy = nl80211_policy,
6931                 .flags = GENL_ADMIN_PERM,
6932                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6933                                   NL80211_FLAG_NEED_RTNL,
6934         },
6935         {
6936                 .cmd = NL80211_CMD_DISASSOCIATE,
6937                 .doit = nl80211_disassociate,
6938                 .policy = nl80211_policy,
6939                 .flags = GENL_ADMIN_PERM,
6940                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6941                                   NL80211_FLAG_NEED_RTNL,
6942         },
6943         {
6944                 .cmd = NL80211_CMD_JOIN_IBSS,
6945                 .doit = nl80211_join_ibss,
6946                 .policy = nl80211_policy,
6947                 .flags = GENL_ADMIN_PERM,
6948                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6949                                   NL80211_FLAG_NEED_RTNL,
6950         },
6951         {
6952                 .cmd = NL80211_CMD_LEAVE_IBSS,
6953                 .doit = nl80211_leave_ibss,
6954                 .policy = nl80211_policy,
6955                 .flags = GENL_ADMIN_PERM,
6956                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6957                                   NL80211_FLAG_NEED_RTNL,
6958         },
6959 #ifdef CONFIG_NL80211_TESTMODE
6960         {
6961                 .cmd = NL80211_CMD_TESTMODE,
6962                 .doit = nl80211_testmode_do,
6963                 .dumpit = nl80211_testmode_dump,
6964                 .policy = nl80211_policy,
6965                 .flags = GENL_ADMIN_PERM,
6966                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6967                                   NL80211_FLAG_NEED_RTNL,
6968         },
6969 #endif
6970         {
6971                 .cmd = NL80211_CMD_CONNECT,
6972                 .doit = nl80211_connect,
6973                 .policy = nl80211_policy,
6974                 .flags = GENL_ADMIN_PERM,
6975                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6976                                   NL80211_FLAG_NEED_RTNL,
6977         },
6978         {
6979                 .cmd = NL80211_CMD_DISCONNECT,
6980                 .doit = nl80211_disconnect,
6981                 .policy = nl80211_policy,
6982                 .flags = GENL_ADMIN_PERM,
6983                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6984                                   NL80211_FLAG_NEED_RTNL,
6985         },
6986         {
6987                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6988                 .doit = nl80211_wiphy_netns,
6989                 .policy = nl80211_policy,
6990                 .flags = GENL_ADMIN_PERM,
6991                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6992                                   NL80211_FLAG_NEED_RTNL,
6993         },
6994         {
6995                 .cmd = NL80211_CMD_GET_SURVEY,
6996                 .policy = nl80211_policy,
6997                 .dumpit = nl80211_dump_survey,
6998         },
6999         {
7000                 .cmd = NL80211_CMD_SET_PMKSA,
7001                 .doit = nl80211_setdel_pmksa,
7002                 .policy = nl80211_policy,
7003                 .flags = GENL_ADMIN_PERM,
7004                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7005                                   NL80211_FLAG_NEED_RTNL,
7006         },
7007         {
7008                 .cmd = NL80211_CMD_DEL_PMKSA,
7009                 .doit = nl80211_setdel_pmksa,
7010                 .policy = nl80211_policy,
7011                 .flags = GENL_ADMIN_PERM,
7012                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7013                                   NL80211_FLAG_NEED_RTNL,
7014         },
7015         {
7016                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7017                 .doit = nl80211_flush_pmksa,
7018                 .policy = nl80211_policy,
7019                 .flags = GENL_ADMIN_PERM,
7020                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7021                                   NL80211_FLAG_NEED_RTNL,
7022         },
7023         {
7024                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7025                 .doit = nl80211_remain_on_channel,
7026                 .policy = nl80211_policy,
7027                 .flags = GENL_ADMIN_PERM,
7028                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7029                                   NL80211_FLAG_NEED_RTNL,
7030         },
7031         {
7032                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7033                 .doit = nl80211_cancel_remain_on_channel,
7034                 .policy = nl80211_policy,
7035                 .flags = GENL_ADMIN_PERM,
7036                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7037                                   NL80211_FLAG_NEED_RTNL,
7038         },
7039         {
7040                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7041                 .doit = nl80211_set_tx_bitrate_mask,
7042                 .policy = nl80211_policy,
7043                 .flags = GENL_ADMIN_PERM,
7044                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7045                                   NL80211_FLAG_NEED_RTNL,
7046         },
7047         {
7048                 .cmd = NL80211_CMD_REGISTER_FRAME,
7049                 .doit = nl80211_register_mgmt,
7050                 .policy = nl80211_policy,
7051                 .flags = GENL_ADMIN_PERM,
7052                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7053                                   NL80211_FLAG_NEED_RTNL,
7054         },
7055         {
7056                 .cmd = NL80211_CMD_FRAME,
7057                 .doit = nl80211_tx_mgmt,
7058                 .policy = nl80211_policy,
7059                 .flags = GENL_ADMIN_PERM,
7060                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7061                                   NL80211_FLAG_NEED_RTNL,
7062         },
7063         {
7064                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7065                 .doit = nl80211_tx_mgmt_cancel_wait,
7066                 .policy = nl80211_policy,
7067                 .flags = GENL_ADMIN_PERM,
7068                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7069                                   NL80211_FLAG_NEED_RTNL,
7070         },
7071         {
7072                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7073                 .doit = nl80211_set_power_save,
7074                 .policy = nl80211_policy,
7075                 .flags = GENL_ADMIN_PERM,
7076                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7077                                   NL80211_FLAG_NEED_RTNL,
7078         },
7079         {
7080                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7081                 .doit = nl80211_get_power_save,
7082                 .policy = nl80211_policy,
7083                 /* can be retrieved by unprivileged users */
7084                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7085                                   NL80211_FLAG_NEED_RTNL,
7086         },
7087         {
7088                 .cmd = NL80211_CMD_SET_CQM,
7089                 .doit = nl80211_set_cqm,
7090                 .policy = nl80211_policy,
7091                 .flags = GENL_ADMIN_PERM,
7092                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7093                                   NL80211_FLAG_NEED_RTNL,
7094         },
7095         {
7096                 .cmd = NL80211_CMD_SET_CHANNEL,
7097                 .doit = nl80211_set_channel,
7098                 .policy = nl80211_policy,
7099                 .flags = GENL_ADMIN_PERM,
7100                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7101                                   NL80211_FLAG_NEED_RTNL,
7102         },
7103         {
7104                 .cmd = NL80211_CMD_SET_WDS_PEER,
7105                 .doit = nl80211_set_wds_peer,
7106                 .policy = nl80211_policy,
7107                 .flags = GENL_ADMIN_PERM,
7108                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7109                                   NL80211_FLAG_NEED_RTNL,
7110         },
7111         {
7112                 .cmd = NL80211_CMD_JOIN_MESH,
7113                 .doit = nl80211_join_mesh,
7114                 .policy = nl80211_policy,
7115                 .flags = GENL_ADMIN_PERM,
7116                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7117                                   NL80211_FLAG_NEED_RTNL,
7118         },
7119         {
7120                 .cmd = NL80211_CMD_LEAVE_MESH,
7121                 .doit = nl80211_leave_mesh,
7122                 .policy = nl80211_policy,
7123                 .flags = GENL_ADMIN_PERM,
7124                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7125                                   NL80211_FLAG_NEED_RTNL,
7126         },
7127         {
7128                 .cmd = NL80211_CMD_GET_WOWLAN,
7129                 .doit = nl80211_get_wowlan,
7130                 .policy = nl80211_policy,
7131                 /* can be retrieved by unprivileged users */
7132                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7133                                   NL80211_FLAG_NEED_RTNL,
7134         },
7135         {
7136                 .cmd = NL80211_CMD_SET_WOWLAN,
7137                 .doit = nl80211_set_wowlan,
7138                 .policy = nl80211_policy,
7139                 .flags = GENL_ADMIN_PERM,
7140                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7141                                   NL80211_FLAG_NEED_RTNL,
7142         },
7143         {
7144                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7145                 .doit = nl80211_set_rekey_data,
7146                 .policy = nl80211_policy,
7147                 .flags = GENL_ADMIN_PERM,
7148                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7149                                   NL80211_FLAG_NEED_RTNL,
7150         },
7151         {
7152                 .cmd = NL80211_CMD_TDLS_MGMT,
7153                 .doit = nl80211_tdls_mgmt,
7154                 .policy = nl80211_policy,
7155                 .flags = GENL_ADMIN_PERM,
7156                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7157                                   NL80211_FLAG_NEED_RTNL,
7158         },
7159         {
7160                 .cmd = NL80211_CMD_TDLS_OPER,
7161                 .doit = nl80211_tdls_oper,
7162                 .policy = nl80211_policy,
7163                 .flags = GENL_ADMIN_PERM,
7164                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7165                                   NL80211_FLAG_NEED_RTNL,
7166         },
7167         {
7168                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7169                 .doit = nl80211_register_unexpected_frame,
7170                 .policy = nl80211_policy,
7171                 .flags = GENL_ADMIN_PERM,
7172                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7173                                   NL80211_FLAG_NEED_RTNL,
7174         },
7175         {
7176                 .cmd = NL80211_CMD_PROBE_CLIENT,
7177                 .doit = nl80211_probe_client,
7178                 .policy = nl80211_policy,
7179                 .flags = GENL_ADMIN_PERM,
7180                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7181                                   NL80211_FLAG_NEED_RTNL,
7182         },
7183         {
7184                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7185                 .doit = nl80211_register_beacons,
7186                 .policy = nl80211_policy,
7187                 .flags = GENL_ADMIN_PERM,
7188                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7189                                   NL80211_FLAG_NEED_RTNL,
7190         },
7191         {
7192                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7193                 .doit = nl80211_set_noack_map,
7194                 .policy = nl80211_policy,
7195                 .flags = GENL_ADMIN_PERM,
7196                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7197                                   NL80211_FLAG_NEED_RTNL,
7198         },
7199
7200 };
7201
7202 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7203         .name = "mlme",
7204 };
7205
7206 /* multicast groups */
7207 static struct genl_multicast_group nl80211_config_mcgrp = {
7208         .name = "config",
7209 };
7210 static struct genl_multicast_group nl80211_scan_mcgrp = {
7211         .name = "scan",
7212 };
7213 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7214         .name = "regulatory",
7215 };
7216
7217 /* notification functions */
7218
7219 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7220 {
7221         struct sk_buff *msg;
7222
7223         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7224         if (!msg)
7225                 return;
7226
7227         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7228                 nlmsg_free(msg);
7229                 return;
7230         }
7231
7232         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7233                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7234 }
7235
7236 static int nl80211_add_scan_req(struct sk_buff *msg,
7237                                 struct cfg80211_registered_device *rdev)
7238 {
7239         struct cfg80211_scan_request *req = rdev->scan_req;
7240         struct nlattr *nest;
7241         int i;
7242
7243         ASSERT_RDEV_LOCK(rdev);
7244
7245         if (WARN_ON(!req))
7246                 return 0;
7247
7248         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7249         if (!nest)
7250                 goto nla_put_failure;
7251         for (i = 0; i < req->n_ssids; i++) {
7252                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7253                         goto nla_put_failure;
7254         }
7255         nla_nest_end(msg, nest);
7256
7257         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7258         if (!nest)
7259                 goto nla_put_failure;
7260         for (i = 0; i < req->n_channels; i++) {
7261                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7262                         goto nla_put_failure;
7263         }
7264         nla_nest_end(msg, nest);
7265
7266         if (req->ie &&
7267             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7268                 goto nla_put_failure;
7269
7270         return 0;
7271  nla_put_failure:
7272         return -ENOBUFS;
7273 }
7274
7275 static int nl80211_send_scan_msg(struct sk_buff *msg,
7276                                  struct cfg80211_registered_device *rdev,
7277                                  struct net_device *netdev,
7278                                  u32 pid, u32 seq, int flags,
7279                                  u32 cmd)
7280 {
7281         void *hdr;
7282
7283         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7284         if (!hdr)
7285                 return -1;
7286
7287         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7288             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7289                 goto nla_put_failure;
7290
7291         /* ignore errors and send incomplete event anyway */
7292         nl80211_add_scan_req(msg, rdev);
7293
7294         return genlmsg_end(msg, hdr);
7295
7296  nla_put_failure:
7297         genlmsg_cancel(msg, hdr);
7298         return -EMSGSIZE;
7299 }
7300
7301 static int
7302 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7303                             struct cfg80211_registered_device *rdev,
7304                             struct net_device *netdev,
7305                             u32 pid, u32 seq, int flags, u32 cmd)
7306 {
7307         void *hdr;
7308
7309         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7310         if (!hdr)
7311                 return -1;
7312
7313         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7314             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7315                 goto nla_put_failure;
7316
7317         return genlmsg_end(msg, hdr);
7318
7319  nla_put_failure:
7320         genlmsg_cancel(msg, hdr);
7321         return -EMSGSIZE;
7322 }
7323
7324 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7325                              struct net_device *netdev)
7326 {
7327         struct sk_buff *msg;
7328
7329         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7330         if (!msg)
7331                 return;
7332
7333         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7334                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7335                 nlmsg_free(msg);
7336                 return;
7337         }
7338
7339         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7340                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7341 }
7342
7343 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7344                             struct net_device *netdev)
7345 {
7346         struct sk_buff *msg;
7347
7348         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7349         if (!msg)
7350                 return;
7351
7352         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7353                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7354                 nlmsg_free(msg);
7355                 return;
7356         }
7357
7358         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7359                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7360 }
7361
7362 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7363                                struct net_device *netdev)
7364 {
7365         struct sk_buff *msg;
7366
7367         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7368         if (!msg)
7369                 return;
7370
7371         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7372                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7373                 nlmsg_free(msg);
7374                 return;
7375         }
7376
7377         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7378                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7379 }
7380
7381 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7382                                      struct net_device *netdev)
7383 {
7384         struct sk_buff *msg;
7385
7386         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7387         if (!msg)
7388                 return;
7389
7390         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7391                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7392                 nlmsg_free(msg);
7393                 return;
7394         }
7395
7396         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7397                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7398 }
7399
7400 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7401                              struct net_device *netdev, u32 cmd)
7402 {
7403         struct sk_buff *msg;
7404
7405         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7406         if (!msg)
7407                 return;
7408
7409         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7410                 nlmsg_free(msg);
7411                 return;
7412         }
7413
7414         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7415                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7416 }
7417
7418 /*
7419  * This can happen on global regulatory changes or device specific settings
7420  * based on custom world regulatory domains.
7421  */
7422 void nl80211_send_reg_change_event(struct regulatory_request *request)
7423 {
7424         struct sk_buff *msg;
7425         void *hdr;
7426
7427         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7428         if (!msg)
7429                 return;
7430
7431         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7432         if (!hdr) {
7433                 nlmsg_free(msg);
7434                 return;
7435         }
7436
7437         /* Userspace can always count this one always being set */
7438         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7439                 goto nla_put_failure;
7440
7441         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7442                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7443                                NL80211_REGDOM_TYPE_WORLD))
7444                         goto nla_put_failure;
7445         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7446                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7447                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7448                         goto nla_put_failure;
7449         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7450                    request->intersect) {
7451                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7452                                NL80211_REGDOM_TYPE_INTERSECTION))
7453                         goto nla_put_failure;
7454         } else {
7455                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7456                                NL80211_REGDOM_TYPE_COUNTRY) ||
7457                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7458                                    request->alpha2))
7459                         goto nla_put_failure;
7460         }
7461
7462         if (wiphy_idx_valid(request->wiphy_idx) &&
7463             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7464                 goto nla_put_failure;
7465
7466         genlmsg_end(msg, hdr);
7467
7468         rcu_read_lock();
7469         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7470                                 GFP_ATOMIC);
7471         rcu_read_unlock();
7472
7473         return;
7474
7475 nla_put_failure:
7476         genlmsg_cancel(msg, hdr);
7477         nlmsg_free(msg);
7478 }
7479
7480 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7481                                     struct net_device *netdev,
7482                                     const u8 *buf, size_t len,
7483                                     enum nl80211_commands cmd, gfp_t gfp)
7484 {
7485         struct sk_buff *msg;
7486         void *hdr;
7487
7488         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7489         if (!msg)
7490                 return;
7491
7492         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7493         if (!hdr) {
7494                 nlmsg_free(msg);
7495                 return;
7496         }
7497
7498         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7499             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7500             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7501                 goto nla_put_failure;
7502
7503         genlmsg_end(msg, hdr);
7504
7505         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7506                                 nl80211_mlme_mcgrp.id, gfp);
7507         return;
7508
7509  nla_put_failure:
7510         genlmsg_cancel(msg, hdr);
7511         nlmsg_free(msg);
7512 }
7513
7514 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7515                           struct net_device *netdev, const u8 *buf,
7516                           size_t len, gfp_t gfp)
7517 {
7518         nl80211_send_mlme_event(rdev, netdev, buf, len,
7519                                 NL80211_CMD_AUTHENTICATE, gfp);
7520 }
7521
7522 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7523                            struct net_device *netdev, const u8 *buf,
7524                            size_t len, gfp_t gfp)
7525 {
7526         nl80211_send_mlme_event(rdev, netdev, buf, len,
7527                                 NL80211_CMD_ASSOCIATE, gfp);
7528 }
7529
7530 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7531                          struct net_device *netdev, const u8 *buf,
7532                          size_t len, gfp_t gfp)
7533 {
7534         nl80211_send_mlme_event(rdev, netdev, buf, len,
7535                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7536 }
7537
7538 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7539                            struct net_device *netdev, const u8 *buf,
7540                            size_t len, gfp_t gfp)
7541 {
7542         nl80211_send_mlme_event(rdev, netdev, buf, len,
7543                                 NL80211_CMD_DISASSOCIATE, gfp);
7544 }
7545
7546 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7547                                 struct net_device *netdev, const u8 *buf,
7548                                 size_t len, gfp_t gfp)
7549 {
7550         nl80211_send_mlme_event(rdev, netdev, buf, len,
7551                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7552 }
7553
7554 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7555                                   struct net_device *netdev, const u8 *buf,
7556                                   size_t len, gfp_t gfp)
7557 {
7558         nl80211_send_mlme_event(rdev, netdev, buf, len,
7559                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7560 }
7561
7562 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7563                                       struct net_device *netdev, int cmd,
7564                                       const u8 *addr, gfp_t gfp)
7565 {
7566         struct sk_buff *msg;
7567         void *hdr;
7568
7569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7570         if (!msg)
7571                 return;
7572
7573         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7574         if (!hdr) {
7575                 nlmsg_free(msg);
7576                 return;
7577         }
7578
7579         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7580             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7581             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7582             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7583                 goto nla_put_failure;
7584
7585         genlmsg_end(msg, hdr);
7586
7587         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7588                                 nl80211_mlme_mcgrp.id, gfp);
7589         return;
7590
7591  nla_put_failure:
7592         genlmsg_cancel(msg, hdr);
7593         nlmsg_free(msg);
7594 }
7595
7596 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7597                                struct net_device *netdev, const u8 *addr,
7598                                gfp_t gfp)
7599 {
7600         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7601                                   addr, gfp);
7602 }
7603
7604 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7605                                 struct net_device *netdev, const u8 *addr,
7606                                 gfp_t gfp)
7607 {
7608         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7609                                   addr, gfp);
7610 }
7611
7612 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7613                                  struct net_device *netdev, const u8 *bssid,
7614                                  const u8 *req_ie, size_t req_ie_len,
7615                                  const u8 *resp_ie, size_t resp_ie_len,
7616                                  u16 status, gfp_t gfp)
7617 {
7618         struct sk_buff *msg;
7619         void *hdr;
7620
7621         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7622         if (!msg)
7623                 return;
7624
7625         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7626         if (!hdr) {
7627                 nlmsg_free(msg);
7628                 return;
7629         }
7630
7631         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7632             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7633             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7634             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7635             (req_ie &&
7636              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7637             (resp_ie &&
7638              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7639                 goto nla_put_failure;
7640
7641         genlmsg_end(msg, hdr);
7642
7643         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7644                                 nl80211_mlme_mcgrp.id, gfp);
7645         return;
7646
7647  nla_put_failure:
7648         genlmsg_cancel(msg, hdr);
7649         nlmsg_free(msg);
7650
7651 }
7652
7653 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7654                          struct net_device *netdev, const u8 *bssid,
7655                          const u8 *req_ie, size_t req_ie_len,
7656                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7657 {
7658         struct sk_buff *msg;
7659         void *hdr;
7660
7661         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7662         if (!msg)
7663                 return;
7664
7665         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7666         if (!hdr) {
7667                 nlmsg_free(msg);
7668                 return;
7669         }
7670
7671         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7672             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7673             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7674             (req_ie &&
7675              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7676             (resp_ie &&
7677              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7678                 goto nla_put_failure;
7679
7680         genlmsg_end(msg, hdr);
7681
7682         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7683                                 nl80211_mlme_mcgrp.id, gfp);
7684         return;
7685
7686  nla_put_failure:
7687         genlmsg_cancel(msg, hdr);
7688         nlmsg_free(msg);
7689
7690 }
7691
7692 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7693                                struct net_device *netdev, u16 reason,
7694                                const u8 *ie, size_t ie_len, bool from_ap)
7695 {
7696         struct sk_buff *msg;
7697         void *hdr;
7698
7699         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7700         if (!msg)
7701                 return;
7702
7703         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7704         if (!hdr) {
7705                 nlmsg_free(msg);
7706                 return;
7707         }
7708
7709         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7710             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7711             (from_ap && reason &&
7712              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7713             (from_ap &&
7714              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7715             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7716                 goto nla_put_failure;
7717
7718         genlmsg_end(msg, hdr);
7719
7720         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7721                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7722         return;
7723
7724  nla_put_failure:
7725         genlmsg_cancel(msg, hdr);
7726         nlmsg_free(msg);
7727
7728 }
7729
7730 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7731                              struct net_device *netdev, const u8 *bssid,
7732                              gfp_t gfp)
7733 {
7734         struct sk_buff *msg;
7735         void *hdr;
7736
7737         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7738         if (!msg)
7739                 return;
7740
7741         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7742         if (!hdr) {
7743                 nlmsg_free(msg);
7744                 return;
7745         }
7746
7747         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7748             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7749             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7750                 goto nla_put_failure;
7751
7752         genlmsg_end(msg, hdr);
7753
7754         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7755                                 nl80211_mlme_mcgrp.id, gfp);
7756         return;
7757
7758  nla_put_failure:
7759         genlmsg_cancel(msg, hdr);
7760         nlmsg_free(msg);
7761 }
7762
7763 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7764                 struct net_device *netdev,
7765                 const u8 *macaddr, const u8* ie, u8 ie_len,
7766                 gfp_t gfp)
7767 {
7768         struct sk_buff *msg;
7769         void *hdr;
7770
7771         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7772         if (!msg)
7773                 return;
7774
7775         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7776         if (!hdr) {
7777                 nlmsg_free(msg);
7778                 return;
7779         }
7780
7781         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7782             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7783             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7784             (ie_len && ie &&
7785              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7786                 goto nla_put_failure;
7787
7788         genlmsg_end(msg, hdr);
7789
7790         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7791                                 nl80211_mlme_mcgrp.id, gfp);
7792         return;
7793
7794  nla_put_failure:
7795         genlmsg_cancel(msg, hdr);
7796         nlmsg_free(msg);
7797 }
7798
7799 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7800                                  struct net_device *netdev, const u8 *addr,
7801                                  enum nl80211_key_type key_type, int key_id,
7802                                  const u8 *tsc, gfp_t gfp)
7803 {
7804         struct sk_buff *msg;
7805         void *hdr;
7806
7807         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7808         if (!msg)
7809                 return;
7810
7811         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7812         if (!hdr) {
7813                 nlmsg_free(msg);
7814                 return;
7815         }
7816
7817         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7818             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7819             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7820             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7821             (key_id != -1 &&
7822              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7823             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7824                 goto nla_put_failure;
7825
7826         genlmsg_end(msg, hdr);
7827
7828         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7829                                 nl80211_mlme_mcgrp.id, gfp);
7830         return;
7831
7832  nla_put_failure:
7833         genlmsg_cancel(msg, hdr);
7834         nlmsg_free(msg);
7835 }
7836
7837 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7838                                     struct ieee80211_channel *channel_before,
7839                                     struct ieee80211_channel *channel_after)
7840 {
7841         struct sk_buff *msg;
7842         void *hdr;
7843         struct nlattr *nl_freq;
7844
7845         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7846         if (!msg)
7847                 return;
7848
7849         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7850         if (!hdr) {
7851                 nlmsg_free(msg);
7852                 return;
7853         }
7854
7855         /*
7856          * Since we are applying the beacon hint to a wiphy we know its
7857          * wiphy_idx is valid
7858          */
7859         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7860                 goto nla_put_failure;
7861
7862         /* Before */
7863         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7864         if (!nl_freq)
7865                 goto nla_put_failure;
7866         if (nl80211_msg_put_channel(msg, channel_before))
7867                 goto nla_put_failure;
7868         nla_nest_end(msg, nl_freq);
7869
7870         /* After */
7871         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7872         if (!nl_freq)
7873                 goto nla_put_failure;
7874         if (nl80211_msg_put_channel(msg, channel_after))
7875                 goto nla_put_failure;
7876         nla_nest_end(msg, nl_freq);
7877
7878         genlmsg_end(msg, hdr);
7879
7880         rcu_read_lock();
7881         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7882                                 GFP_ATOMIC);
7883         rcu_read_unlock();
7884
7885         return;
7886
7887 nla_put_failure:
7888         genlmsg_cancel(msg, hdr);
7889         nlmsg_free(msg);
7890 }
7891
7892 static void nl80211_send_remain_on_chan_event(
7893         int cmd, struct cfg80211_registered_device *rdev,
7894         struct net_device *netdev, u64 cookie,
7895         struct ieee80211_channel *chan,
7896         enum nl80211_channel_type channel_type,
7897         unsigned int duration, gfp_t gfp)
7898 {
7899         struct sk_buff *msg;
7900         void *hdr;
7901
7902         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7903         if (!msg)
7904                 return;
7905
7906         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7907         if (!hdr) {
7908                 nlmsg_free(msg);
7909                 return;
7910         }
7911
7912         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7913             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7914             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7915             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7916             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7917                 goto nla_put_failure;
7918
7919         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7920             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7921                 goto nla_put_failure;
7922
7923         genlmsg_end(msg, hdr);
7924
7925         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7926                                 nl80211_mlme_mcgrp.id, gfp);
7927         return;
7928
7929  nla_put_failure:
7930         genlmsg_cancel(msg, hdr);
7931         nlmsg_free(msg);
7932 }
7933
7934 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7935                                     struct net_device *netdev, u64 cookie,
7936                                     struct ieee80211_channel *chan,
7937                                     enum nl80211_channel_type channel_type,
7938                                     unsigned int duration, gfp_t gfp)
7939 {
7940         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7941                                           rdev, netdev, cookie, chan,
7942                                           channel_type, duration, gfp);
7943 }
7944
7945 void nl80211_send_remain_on_channel_cancel(
7946         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7947         u64 cookie, struct ieee80211_channel *chan,
7948         enum nl80211_channel_type channel_type, gfp_t gfp)
7949 {
7950         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7951                                           rdev, netdev, cookie, chan,
7952                                           channel_type, 0, gfp);
7953 }
7954
7955 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7956                             struct net_device *dev, const u8 *mac_addr,
7957                             struct station_info *sinfo, gfp_t gfp)
7958 {
7959         struct sk_buff *msg;
7960
7961         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7962         if (!msg)
7963                 return;
7964
7965         if (nl80211_send_station(msg, 0, 0, 0,
7966                                  rdev, dev, mac_addr, sinfo) < 0) {
7967                 nlmsg_free(msg);
7968                 return;
7969         }
7970
7971         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7972                                 nl80211_mlme_mcgrp.id, gfp);
7973 }
7974
7975 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7976                                 struct net_device *dev, const u8 *mac_addr,
7977                                 gfp_t gfp)
7978 {
7979         struct sk_buff *msg;
7980         void *hdr;
7981
7982         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7983         if (!msg)
7984                 return;
7985
7986         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7987         if (!hdr) {
7988                 nlmsg_free(msg);
7989                 return;
7990         }
7991
7992         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7993             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
7994                 goto nla_put_failure;
7995
7996         genlmsg_end(msg, hdr);
7997
7998         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7999                                 nl80211_mlme_mcgrp.id, gfp);
8000         return;
8001
8002  nla_put_failure:
8003         genlmsg_cancel(msg, hdr);
8004         nlmsg_free(msg);
8005 }
8006
8007 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8008                                        const u8 *addr, gfp_t gfp)
8009 {
8010         struct wireless_dev *wdev = dev->ieee80211_ptr;
8011         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8012         struct sk_buff *msg;
8013         void *hdr;
8014         int err;
8015         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8016
8017         if (!nlpid)
8018                 return false;
8019
8020         msg = nlmsg_new(100, gfp);
8021         if (!msg)
8022                 return true;
8023
8024         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8025         if (!hdr) {
8026                 nlmsg_free(msg);
8027                 return true;
8028         }
8029
8030         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8031             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8032             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8033                 goto nla_put_failure;
8034
8035         err = genlmsg_end(msg, hdr);
8036         if (err < 0) {
8037                 nlmsg_free(msg);
8038                 return true;
8039         }
8040
8041         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8042         return true;
8043
8044  nla_put_failure:
8045         genlmsg_cancel(msg, hdr);
8046         nlmsg_free(msg);
8047         return true;
8048 }
8049
8050 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8051 {
8052         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8053                                           addr, gfp);
8054 }
8055
8056 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8057                                     const u8 *addr, gfp_t gfp)
8058 {
8059         return __nl80211_unexpected_frame(dev,
8060                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8061                                           addr, gfp);
8062 }
8063
8064 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8065                       struct net_device *netdev, u32 nlpid,
8066                       int freq, int sig_dbm,
8067                       const u8 *buf, size_t len, gfp_t gfp)
8068 {
8069         struct sk_buff *msg;
8070         void *hdr;
8071
8072         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8073         if (!msg)
8074                 return -ENOMEM;
8075
8076         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8077         if (!hdr) {
8078                 nlmsg_free(msg);
8079                 return -ENOMEM;
8080         }
8081
8082         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8083             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8084             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8085             (sig_dbm &&
8086              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8087             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8088                 goto nla_put_failure;
8089
8090         genlmsg_end(msg, hdr);
8091
8092         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8093
8094  nla_put_failure:
8095         genlmsg_cancel(msg, hdr);
8096         nlmsg_free(msg);
8097         return -ENOBUFS;
8098 }
8099
8100 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8101                                  struct net_device *netdev, u64 cookie,
8102                                  const u8 *buf, size_t len, bool ack,
8103                                  gfp_t gfp)
8104 {
8105         struct sk_buff *msg;
8106         void *hdr;
8107
8108         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8109         if (!msg)
8110                 return;
8111
8112         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8113         if (!hdr) {
8114                 nlmsg_free(msg);
8115                 return;
8116         }
8117
8118         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8119             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8120             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8121             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8122             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8123                 goto nla_put_failure;
8124
8125         genlmsg_end(msg, hdr);
8126
8127         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8128         return;
8129
8130  nla_put_failure:
8131         genlmsg_cancel(msg, hdr);
8132         nlmsg_free(msg);
8133 }
8134
8135 void
8136 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8137                              struct net_device *netdev,
8138                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8139                              gfp_t gfp)
8140 {
8141         struct sk_buff *msg;
8142         struct nlattr *pinfoattr;
8143         void *hdr;
8144
8145         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8146         if (!msg)
8147                 return;
8148
8149         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8150         if (!hdr) {
8151                 nlmsg_free(msg);
8152                 return;
8153         }
8154
8155         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8156             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8157                 goto nla_put_failure;
8158
8159         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8160         if (!pinfoattr)
8161                 goto nla_put_failure;
8162
8163         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8164                         rssi_event))
8165                 goto nla_put_failure;
8166
8167         nla_nest_end(msg, pinfoattr);
8168
8169         genlmsg_end(msg, hdr);
8170
8171         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8172                                 nl80211_mlme_mcgrp.id, gfp);
8173         return;
8174
8175  nla_put_failure:
8176         genlmsg_cancel(msg, hdr);
8177         nlmsg_free(msg);
8178 }
8179
8180 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8181                               struct net_device *netdev, const u8 *bssid,
8182                               const u8 *replay_ctr, gfp_t gfp)
8183 {
8184         struct sk_buff *msg;
8185         struct nlattr *rekey_attr;
8186         void *hdr;
8187
8188         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8189         if (!msg)
8190                 return;
8191
8192         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8193         if (!hdr) {
8194                 nlmsg_free(msg);
8195                 return;
8196         }
8197
8198         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8199             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8200             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8201                 goto nla_put_failure;
8202
8203         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8204         if (!rekey_attr)
8205                 goto nla_put_failure;
8206
8207         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8208                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8209                 goto nla_put_failure;
8210
8211         nla_nest_end(msg, rekey_attr);
8212
8213         genlmsg_end(msg, hdr);
8214
8215         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8216                                 nl80211_mlme_mcgrp.id, gfp);
8217         return;
8218
8219  nla_put_failure:
8220         genlmsg_cancel(msg, hdr);
8221         nlmsg_free(msg);
8222 }
8223
8224 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8225                                     struct net_device *netdev, int index,
8226                                     const u8 *bssid, bool preauth, gfp_t gfp)
8227 {
8228         struct sk_buff *msg;
8229         struct nlattr *attr;
8230         void *hdr;
8231
8232         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8233         if (!msg)
8234                 return;
8235
8236         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8237         if (!hdr) {
8238                 nlmsg_free(msg);
8239                 return;
8240         }
8241
8242         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8243             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8244                 goto nla_put_failure;
8245
8246         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8247         if (!attr)
8248                 goto nla_put_failure;
8249
8250         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8251             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8252             (preauth &&
8253              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8254                 goto nla_put_failure;
8255
8256         nla_nest_end(msg, attr);
8257
8258         genlmsg_end(msg, hdr);
8259
8260         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8261                                 nl80211_mlme_mcgrp.id, gfp);
8262         return;
8263
8264  nla_put_failure:
8265         genlmsg_cancel(msg, hdr);
8266         nlmsg_free(msg);
8267 }
8268
8269 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8270                               struct net_device *netdev, int freq,
8271                               enum nl80211_channel_type type, gfp_t gfp)
8272 {
8273         struct sk_buff *msg;
8274         void *hdr;
8275
8276         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8277         if (!msg)
8278                 return;
8279
8280         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8281         if (!hdr) {
8282                 nlmsg_free(msg);
8283                 return;
8284         }
8285
8286         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8287             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8288             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8289                 goto nla_put_failure;
8290
8291         genlmsg_end(msg, hdr);
8292
8293         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8294                                 nl80211_mlme_mcgrp.id, gfp);
8295         return;
8296
8297  nla_put_failure:
8298         genlmsg_cancel(msg, hdr);
8299         nlmsg_free(msg);
8300 }
8301
8302 void
8303 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8304                                 struct net_device *netdev, const u8 *peer,
8305                                 u32 num_packets, gfp_t gfp)
8306 {
8307         struct sk_buff *msg;
8308         struct nlattr *pinfoattr;
8309         void *hdr;
8310
8311         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8312         if (!msg)
8313                 return;
8314
8315         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8316         if (!hdr) {
8317                 nlmsg_free(msg);
8318                 return;
8319         }
8320
8321         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8322             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8323             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8324                 goto nla_put_failure;
8325
8326         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8327         if (!pinfoattr)
8328                 goto nla_put_failure;
8329
8330         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8331                 goto nla_put_failure;
8332
8333         nla_nest_end(msg, pinfoattr);
8334
8335         genlmsg_end(msg, hdr);
8336
8337         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8338                                 nl80211_mlme_mcgrp.id, gfp);
8339         return;
8340
8341  nla_put_failure:
8342         genlmsg_cancel(msg, hdr);
8343         nlmsg_free(msg);
8344 }
8345
8346 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8347                            u64 cookie, bool acked, gfp_t gfp)
8348 {
8349         struct wireless_dev *wdev = dev->ieee80211_ptr;
8350         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8351         struct sk_buff *msg;
8352         void *hdr;
8353         int err;
8354
8355         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8356         if (!msg)
8357                 return;
8358
8359         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8360         if (!hdr) {
8361                 nlmsg_free(msg);
8362                 return;
8363         }
8364
8365         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8366             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8367             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8368             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8369             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8370                 goto nla_put_failure;
8371
8372         err = genlmsg_end(msg, hdr);
8373         if (err < 0) {
8374                 nlmsg_free(msg);
8375                 return;
8376         }
8377
8378         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8379                                 nl80211_mlme_mcgrp.id, gfp);
8380         return;
8381
8382  nla_put_failure:
8383         genlmsg_cancel(msg, hdr);
8384         nlmsg_free(msg);
8385 }
8386 EXPORT_SYMBOL(cfg80211_probe_status);
8387
8388 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8389                                  const u8 *frame, size_t len,
8390                                  int freq, int sig_dbm, gfp_t gfp)
8391 {
8392         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8393         struct sk_buff *msg;
8394         void *hdr;
8395         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8396
8397         if (!nlpid)
8398                 return;
8399
8400         msg = nlmsg_new(len + 100, gfp);
8401         if (!msg)
8402                 return;
8403
8404         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8405         if (!hdr) {
8406                 nlmsg_free(msg);
8407                 return;
8408         }
8409
8410         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8411             (freq &&
8412              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8413             (sig_dbm &&
8414              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8415             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8416                 goto nla_put_failure;
8417
8418         genlmsg_end(msg, hdr);
8419
8420         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8421         return;
8422
8423  nla_put_failure:
8424         genlmsg_cancel(msg, hdr);
8425         nlmsg_free(msg);
8426 }
8427 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8428
8429 static int nl80211_netlink_notify(struct notifier_block * nb,
8430                                   unsigned long state,
8431                                   void *_notify)
8432 {
8433         struct netlink_notify *notify = _notify;
8434         struct cfg80211_registered_device *rdev;
8435         struct wireless_dev *wdev;
8436
8437         if (state != NETLINK_URELEASE)
8438                 return NOTIFY_DONE;
8439
8440         rcu_read_lock();
8441
8442         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8443                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8444                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8445                 if (rdev->ap_beacons_nlpid == notify->pid)
8446                         rdev->ap_beacons_nlpid = 0;
8447         }
8448
8449         rcu_read_unlock();
8450
8451         return NOTIFY_DONE;
8452 }
8453
8454 static struct notifier_block nl80211_netlink_notifier = {
8455         .notifier_call = nl80211_netlink_notify,
8456 };
8457
8458 /* initialisation/exit functions */
8459
8460 int nl80211_init(void)
8461 {
8462         int err;
8463
8464         err = genl_register_family_with_ops(&nl80211_fam,
8465                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8466         if (err)
8467                 return err;
8468
8469         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8470         if (err)
8471                 goto err_out;
8472
8473         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8474         if (err)
8475                 goto err_out;
8476
8477         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8478         if (err)
8479                 goto err_out;
8480
8481         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8482         if (err)
8483                 goto err_out;
8484
8485 #ifdef CONFIG_NL80211_TESTMODE
8486         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8487         if (err)
8488                 goto err_out;
8489 #endif
8490
8491         err = netlink_register_notifier(&nl80211_netlink_notifier);
8492         if (err)
8493                 goto err_out;
8494
8495         return 0;
8496  err_out:
8497         genl_unregister_family(&nl80211_fam);
8498         return err;
8499 }
8500
8501 void nl80211_exit(void)
8502 {
8503         netlink_unregister_notifier(&nl80211_netlink_notifier);
8504         genl_unregister_family(&nl80211_fam);
8505 }