Pileus Git - ~andy/linux/blob - net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 static 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         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 344 };
 345
 346 /* ifidx get helper */
 347 static int nl80211_get_ifidx(struct netlink_callback *cb)
 348 {
 349         int res;
 350
 351         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 352                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 353                           nl80211_policy);
 354         if (res)
 355                 return res;
 356
 357         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 358                 return -EINVAL;
 359
 360         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 361         if (!res)
 362                 return -EINVAL;
 363         return res;
 364 }
 365
 366 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 367                                        struct netlink_callback *cb,
 368                                        struct cfg80211_registered_device **rdev,
 369                                        struct net_device **dev)
 370 {
 371         int ifidx = cb->args[0];
 372         int err;
 373
 374         if (!ifidx)
 375                 ifidx = nl80211_get_ifidx(cb);
 376         if (ifidx < 0)
 377                 return ifidx;
 378
 379         cb->args[0] = ifidx;
 380
 381         rtnl_lock();
 382
 383         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 384         if (!*dev) {
 385                 err = -ENODEV;
 386                 goto out_rtnl;
 387         }
 388
 389         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 390         if (IS_ERR(*rdev)) {
 391                 err = PTR_ERR(*rdev);
 392                 goto out_rtnl;
 393         }
 394
 395         return 0;
 396  out_rtnl:
 397         rtnl_unlock();
 398         return err;
 399 }
 400
 401 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 402 {
 403         cfg80211_unlock_rdev(rdev);
 404         rtnl_unlock();
 405 }
 406
 407 /* IE validation */
 408 static bool is_valid_ie_attr(const struct nlattr *attr)
 409 {
 410         const u8 *pos;
 411         int len;
 412
 413         if (!attr)
 414                 return true;
 415
 416         pos = nla_data(attr);
 417         len = nla_len(attr);
 418
 419         while (len) {
 420                 u8 elemlen;
 421
 422                 if (len < 2)
 423                         return false;
 424                 len -= 2;
 425
 426                 elemlen = pos[1];
 427                 if (elemlen > len)
 428                         return false;
 429
 430                 len -= elemlen;
 431                 pos += 2 + elemlen;
 432         }
 433
 434         return true;
 435 }
 436
 437 /* message building helper */
 438 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 439                                    int flags, u8 cmd)
 440 {
 441         /* since there is no private header just add the generic one */
 442         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 443 }
 444
 445 static int nl80211_msg_put_channel(struct sk_buff *msg,
 446                                    struct ieee80211_channel *chan)
 447 {
 448         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 449                         chan->center_freq))
 450                 goto nla_put_failure;
 451
 452         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 453             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 454                 goto nla_put_failure;
 455         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 456             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 457                 goto nla_put_failure;
 458         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 459             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 460                 goto nla_put_failure;
 461         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 462             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 463                 goto nla_put_failure;
 464
 465         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 466                         DBM_TO_MBM(chan->max_power)))
 467                 goto nla_put_failure;
 468
 469         return 0;
 470
 471  nla_put_failure:
 472         return -ENOBUFS;
 473 }
 474
 475 /* netlink command implementations */
 476
 477 struct key_parse {
 478         struct key_params p;
 479         int idx;
 480         int type;
 481         bool def, defmgmt;
 482         bool def_uni, def_multi;
 483 };
 484
 485 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 486 {
 487         struct nlattr *tb[NL80211_KEY_MAX + 1];
 488         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 489                                    nl80211_key_policy);
 490         if (err)
 491                 return err;
 492
 493         k->def = !!tb[NL80211_KEY_DEFAULT];
 494         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 495
 496         if (k->def) {
 497                 k->def_uni = true;
 498                 k->def_multi = true;
 499         }
 500         if (k->defmgmt)
 501                 k->def_multi = true;
 502
 503         if (tb[NL80211_KEY_IDX])
 504                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 505
 506         if (tb[NL80211_KEY_DATA]) {
 507                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 508                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 509         }
 510
 511         if (tb[NL80211_KEY_SEQ]) {
 512                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 513                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 514         }
 515
 516         if (tb[NL80211_KEY_CIPHER])
 517                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 518
 519         if (tb[NL80211_KEY_TYPE]) {
 520                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 521                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 522                         return -EINVAL;
 523         }
 524
 525         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 526                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 527                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 528                                        tb[NL80211_KEY_DEFAULT_TYPES],
 529                                        nl80211_key_default_policy);
 530                 if (err)
 531                         return err;
 532
 533                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 534                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 535         }
 536
 537         return 0;
 538 }
 539
 540 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 541 {
 542         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 543                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 544                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 545         }
 546
 547         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 548                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 549                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 550         }
 551
 552         if (info->attrs[NL80211_ATTR_KEY_IDX])
 553                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 554
 555         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 556                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 557
 558         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 559         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 560
 561         if (k->def) {
 562                 k->def_uni = true;
 563                 k->def_multi = true;
 564         }
 565         if (k->defmgmt)
 566                 k->def_multi = true;
 567
 568         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 569                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 570                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 571                         return -EINVAL;
 572         }
 573
 574         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 575                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 576                 int err = nla_parse_nested(
 577                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 578                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 579                                 nl80211_key_default_policy);
 580                 if (err)
 581                         return err;
 582
 583                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 584                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 585         }
 586
 587         return 0;
 588 }
 589
 590 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 591 {
 592         int err;
 593
 594         memset(k, 0, sizeof(*k));
 595         k->idx = -1;
 596         k->type = -1;
 597
 598         if (info->attrs[NL80211_ATTR_KEY])
 599                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 600         else
 601                 err = nl80211_parse_key_old(info, k);
 602
 603         if (err)
 604                 return err;
 605
 606         if (k->def && k->defmgmt)
 607                 return -EINVAL;
 608
 609         if (k->defmgmt) {
 610                 if (k->def_uni || !k->def_multi)
 611                         return -EINVAL;
 612         }
 613
 614         if (k->idx != -1) {
 615                 if (k->defmgmt) {
 616                         if (k->idx < 4 || k->idx > 5)
 617                                 return -EINVAL;
 618                 } else if (k->def) {
 619                         if (k->idx < 0 || k->idx > 3)
 620                                 return -EINVAL;
 621                 } else {
 622                         if (k->idx < 0 || k->idx > 5)
 623                                 return -EINVAL;
 624                 }
 625         }
 626
 627         return 0;
 628 }
 629
 630 static struct cfg80211_cached_keys *
 631 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 632                        struct nlattr *keys)
 633 {
 634         struct key_parse parse;
 635         struct nlattr *key;
 636         struct cfg80211_cached_keys *result;
 637         int rem, err, def = 0;
 638
 639         result = kzalloc(sizeof(*result), GFP_KERNEL);
 640         if (!result)
 641                 return ERR_PTR(-ENOMEM);
 642
 643         result->def = -1;
 644         result->defmgmt = -1;
 645
 646         nla_for_each_nested(key, keys, rem) {
 647                 memset(&parse, 0, sizeof(parse));
 648                 parse.idx = -1;
 649
 650                 err = nl80211_parse_key_new(key, &parse);
 651                 if (err)
 652                         goto error;
 653                 err = -EINVAL;
 654                 if (!parse.p.key)
 655                         goto error;
 656                 if (parse.idx < 0 || parse.idx > 4)
 657                         goto error;
 658                 if (parse.def) {
 659                         if (def)
 660                                 goto error;
 661                         def = 1;
 662                         result->def = parse.idx;
 663                         if (!parse.def_uni || !parse.def_multi)
 664                                 goto error;
 665                 } else if (parse.defmgmt)
 666                         goto error;
 667                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 668                                                      parse.idx, false, NULL);
 669                 if (err)
 670                         goto error;
 671                 result->params[parse.idx].cipher = parse.p.cipher;
 672                 result->params[parse.idx].key_len = parse.p.key_len;
 673                 result->params[parse.idx].key = result->data[parse.idx];
 674                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 675         }
 676
 677         return result;
 678  error:
 679         kfree(result);
 680         return ERR_PTR(err);
 681 }
 682
 683 static int nl80211_key_allowed(struct wireless_dev *wdev)
 684 {
 685         ASSERT_WDEV_LOCK(wdev);
 686
 687         switch (wdev->iftype) {
 688         case NL80211_IFTYPE_AP:
 689         case NL80211_IFTYPE_AP_VLAN:
 690         case NL80211_IFTYPE_P2P_GO:
 691         case NL80211_IFTYPE_MESH_POINT:
 692                 break;
 693         case NL80211_IFTYPE_ADHOC:
 694                 if (!wdev->current_bss)
 695                         return -ENOLINK;
 696                 break;
 697         case NL80211_IFTYPE_STATION:
 698         case NL80211_IFTYPE_P2P_CLIENT:
 699                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 700                         return -ENOLINK;
 701                 break;
 702         default:
 703                 return -EINVAL;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 710 {
 711         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 712         int i;
 713
 714         if (!nl_modes)
 715                 goto nla_put_failure;
 716
 717         i = 0;
 718         while (ifmodes) {
 719                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 720                         goto nla_put_failure;
 721                 ifmodes >>= 1;
 722                 i++;
 723         }
 724
 725         nla_nest_end(msg, nl_modes);
 726         return 0;
 727
 728 nla_put_failure:
 729         return -ENOBUFS;
 730 }
 731
 732 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 733                                           struct sk_buff *msg)
 734 {
 735         struct nlattr *nl_combis;
 736         int i, j;
 737
 738         nl_combis = nla_nest_start(msg,
 739                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 740         if (!nl_combis)
 741                 goto nla_put_failure;
 742
 743         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 744                 const struct ieee80211_iface_combination *c;
 745                 struct nlattr *nl_combi, *nl_limits;
 746
 747                 c = &wiphy->iface_combinations[i];
 748
 749                 nl_combi = nla_nest_start(msg, i + 1);
 750                 if (!nl_combi)
 751                         goto nla_put_failure;
 752
 753                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 754                 if (!nl_limits)
 755                         goto nla_put_failure;
 756
 757                 for (j = 0; j < c->n_limits; j++) {
 758                         struct nlattr *nl_limit;
 759
 760                         nl_limit = nla_nest_start(msg, j + 1);
 761                         if (!nl_limit)
 762                                 goto nla_put_failure;
 763                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 764                                         c->limits[j].max))
 765                                 goto nla_put_failure;
 766                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 767                                                 c->limits[j].types))
 768                                 goto nla_put_failure;
 769                         nla_nest_end(msg, nl_limit);
 770                 }
 771
 772                 nla_nest_end(msg, nl_limits);
 773
 774                 if (c->beacon_int_infra_match &&
 775                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 776                         goto nla_put_failure;
 777                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 778                                 c->num_different_channels) ||
 779                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 780                                 c->max_interfaces))
 781                         goto nla_put_failure;
 782
 783                 nla_nest_end(msg, nl_combi);
 784         }
 785
 786         nla_nest_end(msg, nl_combis);
 787
 788         return 0;
 789 nla_put_failure:
 790         return -ENOBUFS;
 791 }
 792
 793 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 794                               struct cfg80211_registered_device *dev)
 795 {
 796         void *hdr;
 797         struct nlattr *nl_bands, *nl_band;
 798         struct nlattr *nl_freqs, *nl_freq;
 799         struct nlattr *nl_rates, *nl_rate;
 800         struct nlattr *nl_cmds;
 801         enum ieee80211_band band;
 802         struct ieee80211_channel *chan;
 803         struct ieee80211_rate *rate;
 804         int i;
 805         const struct ieee80211_txrx_stypes *mgmt_stypes =
 806                                 dev->wiphy.mgmt_stypes;
 807
 808         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 809         if (!hdr)
 810                 return -1;
 811
 812         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 813             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 814             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 815                         cfg80211_rdev_list_generation) ||
 816             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 817                        dev->wiphy.retry_short) ||
 818             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 819                        dev->wiphy.retry_long) ||
 820             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 821                         dev->wiphy.frag_threshold) ||
 822             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 823                         dev->wiphy.rts_threshold) ||
 824             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 825                        dev->wiphy.coverage_class) ||
 826             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 827                        dev->wiphy.max_scan_ssids) ||
 828             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 829                        dev->wiphy.max_sched_scan_ssids) ||
 830             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 831                         dev->wiphy.max_scan_ie_len) ||
 832             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 833                         dev->wiphy.max_sched_scan_ie_len) ||
 834             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 835                        dev->wiphy.max_match_sets))
 836                 goto nla_put_failure;
 837
 838         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 839             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 840                 goto nla_put_failure;
 841         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 842             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 843                 goto nla_put_failure;
 844         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 845             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 846                 goto nla_put_failure;
 847         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 848             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 849                 goto nla_put_failure;
 850         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 851             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 852                 goto nla_put_failure;
 853         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 854             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 855                 goto nla_put_failure;
 856
 857         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 858                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 859                     dev->wiphy.cipher_suites))
 860                 goto nla_put_failure;
 861
 862         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 863                        dev->wiphy.max_num_pmkids))
 864                 goto nla_put_failure;
 865
 866         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 867             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 868                 goto nla_put_failure;
 869
 870         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 871                         dev->wiphy.available_antennas_tx) ||
 872             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 873                         dev->wiphy.available_antennas_rx))
 874                 goto nla_put_failure;
 875
 876         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 877             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 878                         dev->wiphy.probe_resp_offload))
 879                 goto nla_put_failure;
 880
 881         if ((dev->wiphy.available_antennas_tx ||
 882              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 883                 u32 tx_ant = 0, rx_ant = 0;
 884                 int res;
 885                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 886                 if (!res) {
 887                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 888                                         tx_ant) ||
 889                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 890                                         rx_ant))
 891                                 goto nla_put_failure;
 892                 }
 893         }
 894
 895         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 896                                 dev->wiphy.interface_modes))
 897                 goto nla_put_failure;
 898
 899         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 900         if (!nl_bands)
 901                 goto nla_put_failure;
 902
 903         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 904                 if (!dev->wiphy.bands[band])
 905                         continue;
 906
 907                 nl_band = nla_nest_start(msg, band);
 908                 if (!nl_band)
 909                         goto nla_put_failure;
 910
 911                 /* add HT info */
 912                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 913                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 914                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 915                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 916                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 917                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 918                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 919                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 920                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 921                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 922                         goto nla_put_failure;
 923
 924                 /* add frequencies */
 925                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 926                 if (!nl_freqs)
 927                         goto nla_put_failure;
 928
 929                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 930                         nl_freq = nla_nest_start(msg, i);
 931                         if (!nl_freq)
 932                                 goto nla_put_failure;
 933
 934                         chan = &dev->wiphy.bands[band]->channels[i];
 935
 936                         if (nl80211_msg_put_channel(msg, chan))
 937                                 goto nla_put_failure;
 938
 939                         nla_nest_end(msg, nl_freq);
 940                 }
 941
 942                 nla_nest_end(msg, nl_freqs);
 943
 944                 /* add bitrates */
 945                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 946                 if (!nl_rates)
 947                         goto nla_put_failure;
 948
 949                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 950                         nl_rate = nla_nest_start(msg, i);
 951                         if (!nl_rate)
 952                                 goto nla_put_failure;
 953
 954                         rate = &dev->wiphy.bands[band]->bitrates[i];
 955                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 956                                         rate->bitrate))
 957                                 goto nla_put_failure;
 958                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 959                             nla_put_flag(msg,
 960                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 961                                 goto nla_put_failure;
 962
 963                         nla_nest_end(msg, nl_rate);
 964                 }
 965
 966                 nla_nest_end(msg, nl_rates);
 967
 968                 nla_nest_end(msg, nl_band);
 969         }
 970         nla_nest_end(msg, nl_bands);
 971
 972         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 973         if (!nl_cmds)
 974                 goto nla_put_failure;
 975
 976         i = 0;
 977 #define CMD(op, n)                                              \
 978          do {                                                   \
 979                 if (dev->ops->op) {                             \
 980                         i++;                                    \
 981                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 982                                 goto nla_put_failure;           \
 983                 }                                               \
 984         } while (0)
 985
 986         CMD(add_virtual_intf, NEW_INTERFACE);
 987         CMD(change_virtual_intf, SET_INTERFACE);
 988         CMD(add_key, NEW_KEY);
 989         CMD(start_ap, START_AP);
 990         CMD(add_station, NEW_STATION);
 991         CMD(add_mpath, NEW_MPATH);
 992         CMD(update_mesh_config, SET_MESH_CONFIG);
 993         CMD(change_bss, SET_BSS);
 994         CMD(auth, AUTHENTICATE);
 995         CMD(assoc, ASSOCIATE);
 996         CMD(deauth, DEAUTHENTICATE);
 997         CMD(disassoc, DISASSOCIATE);
 998         CMD(join_ibss, JOIN_IBSS);
 999         CMD(join_mesh, JOIN_MESH);
1000         CMD(set_pmksa, SET_PMKSA);
1001         CMD(del_pmksa, DEL_PMKSA);
1002         CMD(flush_pmksa, FLUSH_PMKSA);
1003         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1004                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1005         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1006         CMD(mgmt_tx, FRAME);
1007         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1008         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1009                 i++;
1010                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1011                         goto nla_put_failure;
1012         }
1013         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1014             dev->ops->join_mesh) {
1015                 i++;
1016                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1017                         goto nla_put_failure;
1018         }
1019         CMD(set_wds_peer, SET_WDS_PEER);
1020         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1021                 CMD(tdls_mgmt, TDLS_MGMT);
1022                 CMD(tdls_oper, TDLS_OPER);
1023         }
1024         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1025                 CMD(sched_scan_start, START_SCHED_SCAN);
1026         CMD(probe_client, PROBE_CLIENT);
1027         CMD(set_noack_map, SET_NOACK_MAP);
1028         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1029                 i++;
1030                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1031                         goto nla_put_failure;
1032         }
1033
1034 #ifdef CONFIG_NL80211_TESTMODE
1035         CMD(testmode_cmd, TESTMODE);
1036 #endif
1037
1038 #undef CMD
1039
1040         if (dev->ops->connect || dev->ops->auth) {
1041                 i++;
1042                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1043                         goto nla_put_failure;
1044         }
1045
1046         if (dev->ops->disconnect || dev->ops->deauth) {
1047                 i++;
1048                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1049                         goto nla_put_failure;
1050         }
1051
1052         nla_nest_end(msg, nl_cmds);
1053
1054         if (dev->ops->remain_on_channel &&
1055             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1056             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1057                         dev->wiphy.max_remain_on_channel_duration))
1058                 goto nla_put_failure;
1059
1060         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1061             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1062                 goto nla_put_failure;
1063
1064         if (mgmt_stypes) {
1065                 u16 stypes;
1066                 struct nlattr *nl_ftypes, *nl_ifs;
1067                 enum nl80211_iftype ift;
1068
1069                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1070                 if (!nl_ifs)
1071                         goto nla_put_failure;
1072
1073                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1074                         nl_ftypes = nla_nest_start(msg, ift);
1075                         if (!nl_ftypes)
1076                                 goto nla_put_failure;
1077                         i = 0;
1078                         stypes = mgmt_stypes[ift].tx;
1079                         while (stypes) {
1080                                 if ((stypes & 1) &&
1081                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1082                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1083                                         goto nla_put_failure;
1084                                 stypes >>= 1;
1085                                 i++;
1086                         }
1087                         nla_nest_end(msg, nl_ftypes);
1088                 }
1089
1090                 nla_nest_end(msg, nl_ifs);
1091
1092                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1093                 if (!nl_ifs)
1094                         goto nla_put_failure;
1095
1096                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1097                         nl_ftypes = nla_nest_start(msg, ift);
1098                         if (!nl_ftypes)
1099                                 goto nla_put_failure;
1100                         i = 0;
1101                         stypes = mgmt_stypes[ift].rx;
1102                         while (stypes) {
1103                                 if ((stypes & 1) &&
1104                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1105                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1106                                         goto nla_put_failure;
1107                                 stypes >>= 1;
1108                                 i++;
1109                         }
1110                         nla_nest_end(msg, nl_ftypes);
1111                 }
1112                 nla_nest_end(msg, nl_ifs);
1113         }
1114
1115 #ifdef CONFIG_PM
1116         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1117                 struct nlattr *nl_wowlan;
1118
1119                 nl_wowlan = nla_nest_start(msg,
1120                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1121                 if (!nl_wowlan)
1122                         goto nla_put_failure;
1123
1124                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1125                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1126                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1127                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1128                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1129                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1130                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1131                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1132                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1133                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1134                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1135                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1136                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1137                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1138                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1139                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1140                     goto nla_put_failure;
1141                 if (dev->wiphy.wowlan.n_patterns) {
1142                         struct nl80211_wowlan_pattern_support pat = {
1143                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1144                                 .min_pattern_len =
1145                                         dev->wiphy.wowlan.pattern_min_len,
1146                                 .max_pattern_len =
1147                                         dev->wiphy.wowlan.pattern_max_len,
1148                         };
1149                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1150                                     sizeof(pat), &pat))
1151                                 goto nla_put_failure;
1152                 }
1153
1154                 nla_nest_end(msg, nl_wowlan);
1155         }
1156 #endif
1157
1158         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1159                                 dev->wiphy.software_iftypes))
1160                 goto nla_put_failure;
1161
1162         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1163                 goto nla_put_failure;
1164
1165         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1166             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1167                         dev->wiphy.ap_sme_capa))
1168                 goto nla_put_failure;
1169
1170         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1171                         dev->wiphy.features))
1172                 goto nla_put_failure;
1173
1174         if (dev->wiphy.ht_capa_mod_mask &&
1175             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1176                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1177                     dev->wiphy.ht_capa_mod_mask))
1178                 goto nla_put_failure;
1179
1180         return genlmsg_end(msg, hdr);
1181
1182  nla_put_failure:
1183         genlmsg_cancel(msg, hdr);
1184         return -EMSGSIZE;
1185 }
1186
1187 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1188 {
1189         int idx = 0;
1190         int start = cb->args[0];
1191         struct cfg80211_registered_device *dev;
1192
1193         mutex_lock(&cfg80211_mutex);
1194         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1195                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1196                         continue;
1197                 if (++idx <= start)
1198                         continue;
1199                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1200                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1201                                        dev) < 0) {
1202                         idx--;
1203                         break;
1204                 }
1205         }
1206         mutex_unlock(&cfg80211_mutex);
1207
1208         cb->args[0] = idx;
1209
1210         return skb->len;
1211 }
1212
1213 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1214 {
1215         struct sk_buff *msg;
1216         struct cfg80211_registered_device *dev = info->user_ptr[0];
1217
1218         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1219         if (!msg)
1220                 return -ENOMEM;
1221
1222         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1223                 nlmsg_free(msg);
1224                 return -ENOBUFS;
1225         }
1226
1227         return genlmsg_reply(msg, info);
1228 }
1229
1230 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1231         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1232         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1233         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1234         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1235         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1236 };
1237
1238 static int parse_txq_params(struct nlattr *tb[],
1239                             struct ieee80211_txq_params *txq_params)
1240 {
1241         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1242             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1243             !tb[NL80211_TXQ_ATTR_AIFS])
1244                 return -EINVAL;
1245
1246         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1247         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1248         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1249         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1250         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1251
1252         if (txq_params->ac >= NL80211_NUM_ACS)
1253                 return -EINVAL;
1254
1255         return 0;
1256 }
1257
1258 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1259 {
1260         /*
1261          * You can only set the channel explicitly for WDS interfaces,
1262          * all others have their channel managed via their respective
1263          * "establish a connection" command (connect, join, ...)
1264          *
1265          * For AP/GO and mesh mode, the channel can be set with the
1266          * channel userspace API, but is only stored and passed to the
1267          * low-level driver when the AP starts or the mesh is joined.
1268          * This is for backward compatibility, userspace can also give
1269          * the channel in the start-ap or join-mesh commands instead.
1270          *
1271          * Monitors are special as they are normally slaved to
1272          * whatever else is going on, so they have their own special
1273          * operation to set the monitor channel if possible.
1274          */
1275         return !wdev ||
1276                 wdev->iftype == NL80211_IFTYPE_AP ||
1277                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1278                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1279                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1280 }
1281
1282 static bool nl80211_valid_channel_type(struct genl_info *info,
1283                                        enum nl80211_channel_type *channel_type)
1284 {
1285         enum nl80211_channel_type tmp;
1286
1287         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1288                 return false;
1289
1290         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1291         if (tmp != NL80211_CHAN_NO_HT &&
1292             tmp != NL80211_CHAN_HT20 &&
1293             tmp != NL80211_CHAN_HT40PLUS &&
1294             tmp != NL80211_CHAN_HT40MINUS)
1295                 return false;
1296
1297         if (channel_type)
1298                 *channel_type = tmp;
1299
1300         return true;
1301 }
1302
1303 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1304                                  struct wireless_dev *wdev,
1305                                  struct genl_info *info)
1306 {
1307         struct ieee80211_channel *channel;
1308         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1309         u32 freq;
1310         int result;
1311         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1312
1313         if (wdev)
1314                 iftype = wdev->iftype;
1315
1316         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1317                 return -EINVAL;
1318
1319         if (!nl80211_can_set_dev_channel(wdev))
1320                 return -EOPNOTSUPP;
1321
1322         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1323             !nl80211_valid_channel_type(info, &channel_type))
1324                 return -EINVAL;
1325
1326         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1327
1328         mutex_lock(&rdev->devlist_mtx);
1329         switch (iftype) {
1330         case NL80211_IFTYPE_AP:
1331         case NL80211_IFTYPE_P2P_GO:
1332                 if (wdev->beacon_interval) {
1333                         result = -EBUSY;
1334                         break;
1335                 }
1336                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1337                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1338                                                               channel,
1339                                                               channel_type)) {
1340                         result = -EINVAL;
1341                         break;
1342                 }
1343                 wdev->preset_chan = channel;
1344                 wdev->preset_chantype = channel_type;
1345                 result = 0;
1346                 break;
1347         case NL80211_IFTYPE_MESH_POINT:
1348                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1349                 break;
1350         case NL80211_IFTYPE_MONITOR:
1351                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1352                 break;
1353         default:
1354                 result = -EINVAL;
1355         }
1356         mutex_unlock(&rdev->devlist_mtx);
1357
1358         return result;
1359 }
1360
1361 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1362 {
1363         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1364         struct net_device *netdev = info->user_ptr[1];
1365
1366         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1367 }
1368
1369 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1370 {
1371         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1372         struct net_device *dev = info->user_ptr[1];
1373         struct wireless_dev *wdev = dev->ieee80211_ptr;
1374         const u8 *bssid;
1375
1376         if (!info->attrs[NL80211_ATTR_MAC])
1377                 return -EINVAL;
1378
1379         if (netif_running(dev))
1380                 return -EBUSY;
1381
1382         if (!rdev->ops->set_wds_peer)
1383                 return -EOPNOTSUPP;
1384
1385         if (wdev->iftype != NL80211_IFTYPE_WDS)
1386                 return -EOPNOTSUPP;
1387
1388         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1389         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1390 }
1391
1392
1393 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1394 {
1395         struct cfg80211_registered_device *rdev;
1396         struct net_device *netdev = NULL;
1397         struct wireless_dev *wdev;
1398         int result = 0, rem_txq_params = 0;
1399         struct nlattr *nl_txq_params;
1400         u32 changed;
1401         u8 retry_short = 0, retry_long = 0;
1402         u32 frag_threshold = 0, rts_threshold = 0;
1403         u8 coverage_class = 0;
1404
1405         /*
1406          * Try to find the wiphy and netdev. Normally this
1407          * function shouldn't need the netdev, but this is
1408          * done for backward compatibility -- previously
1409          * setting the channel was done per wiphy, but now
1410          * it is per netdev. Previous userland like hostapd
1411          * also passed a netdev to set_wiphy, so that it is
1412          * possible to let that go to the right netdev!
1413          */
1414         mutex_lock(&cfg80211_mutex);
1415
1416         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1417                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1418
1419                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1420                 if (netdev && netdev->ieee80211_ptr) {
1421                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1422                         mutex_lock(&rdev->mtx);
1423                 } else
1424                         netdev = NULL;
1425         }
1426
1427         if (!netdev) {
1428                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1429                                                   info->attrs);
1430                 if (IS_ERR(rdev)) {
1431                         mutex_unlock(&cfg80211_mutex);
1432                         return PTR_ERR(rdev);
1433                 }
1434                 wdev = NULL;
1435                 netdev = NULL;
1436                 result = 0;
1437
1438                 mutex_lock(&rdev->mtx);
1439         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1440                 wdev = netdev->ieee80211_ptr;
1441         else
1442                 wdev = NULL;
1443
1444         /*
1445          * end workaround code, by now the rdev is available
1446          * and locked, and wdev may or may not be NULL.
1447          */
1448
1449         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1450                 result = cfg80211_dev_rename(
1451                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1452
1453         mutex_unlock(&cfg80211_mutex);
1454
1455         if (result)
1456                 goto bad_res;
1457
1458         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1459                 struct ieee80211_txq_params txq_params;
1460                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1461
1462                 if (!rdev->ops->set_txq_params) {
1463                         result = -EOPNOTSUPP;
1464                         goto bad_res;
1465                 }
1466
1467                 if (!netdev) {
1468                         result = -EINVAL;
1469                         goto bad_res;
1470                 }
1471
1472                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1473                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1474                         result = -EINVAL;
1475                         goto bad_res;
1476                 }
1477
1478                 if (!netif_running(netdev)) {
1479                         result = -ENETDOWN;
1480                         goto bad_res;
1481                 }
1482
1483                 nla_for_each_nested(nl_txq_params,
1484                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1485                                     rem_txq_params) {
1486                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1487                                   nla_data(nl_txq_params),
1488                                   nla_len(nl_txq_params),
1489                                   txq_params_policy);
1490                         result = parse_txq_params(tb, &txq_params);
1491                         if (result)
1492                                 goto bad_res;
1493
1494                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1495                                                            netdev,
1496                                                            &txq_params);
1497                         if (result)
1498                                 goto bad_res;
1499                 }
1500         }
1501
1502         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1503                 result = __nl80211_set_channel(rdev, wdev, info);
1504                 if (result)
1505                         goto bad_res;
1506         }
1507
1508         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1509                 enum nl80211_tx_power_setting type;
1510                 int idx, mbm = 0;
1511
1512                 if (!rdev->ops->set_tx_power) {
1513                         result = -EOPNOTSUPP;
1514                         goto bad_res;
1515                 }
1516
1517                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1518                 type = nla_get_u32(info->attrs[idx]);
1519
1520                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1521                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1522                         result = -EINVAL;
1523                         goto bad_res;
1524                 }
1525
1526                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1527                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1528                         mbm = nla_get_u32(info->attrs[idx]);
1529                 }
1530
1531                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1532                 if (result)
1533                         goto bad_res;
1534         }
1535
1536         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1537             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1538                 u32 tx_ant, rx_ant;
1539                 if ((!rdev->wiphy.available_antennas_tx &&
1540                      !rdev->wiphy.available_antennas_rx) ||
1541                     !rdev->ops->set_antenna) {
1542                         result = -EOPNOTSUPP;
1543                         goto bad_res;
1544                 }
1545
1546                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1547                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1548
1549                 /* reject antenna configurations which don't match the
1550                  * available antenna masks, except for the "all" mask */
1551                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1552                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1553                         result = -EINVAL;
1554                         goto bad_res;
1555                 }
1556
1557                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1558                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1559
1560                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1561                 if (result)
1562                         goto bad_res;
1563         }
1564
1565         changed = 0;
1566
1567         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1568                 retry_short = nla_get_u8(
1569                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1570                 if (retry_short == 0) {
1571                         result = -EINVAL;
1572                         goto bad_res;
1573                 }
1574                 changed |= WIPHY_PARAM_RETRY_SHORT;
1575         }
1576
1577         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1578                 retry_long = nla_get_u8(
1579                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1580                 if (retry_long == 0) {
1581                         result = -EINVAL;
1582                         goto bad_res;
1583                 }
1584                 changed |= WIPHY_PARAM_RETRY_LONG;
1585         }
1586
1587         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1588                 frag_threshold = nla_get_u32(
1589                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1590                 if (frag_threshold < 256) {
1591                         result = -EINVAL;
1592                         goto bad_res;
1593                 }
1594                 if (frag_threshold != (u32) -1) {
1595                         /*
1596                          * Fragments (apart from the last one) are required to
1597                          * have even length. Make the fragmentation code
1598                          * simpler by stripping LSB should someone try to use
1599                          * odd threshold value.
1600                          */
1601                         frag_threshold &= ~0x1;
1602                 }
1603                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1604         }
1605
1606         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1607                 rts_threshold = nla_get_u32(
1608                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1609                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1610         }
1611
1612         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1613                 coverage_class = nla_get_u8(
1614                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1615                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1616         }
1617
1618         if (changed) {
1619                 u8 old_retry_short, old_retry_long;
1620                 u32 old_frag_threshold, old_rts_threshold;
1621                 u8 old_coverage_class;
1622
1623                 if (!rdev->ops->set_wiphy_params) {
1624                         result = -EOPNOTSUPP;
1625                         goto bad_res;
1626                 }
1627
1628                 old_retry_short = rdev->wiphy.retry_short;
1629                 old_retry_long = rdev->wiphy.retry_long;
1630                 old_frag_threshold = rdev->wiphy.frag_threshold;
1631                 old_rts_threshold = rdev->wiphy.rts_threshold;
1632                 old_coverage_class = rdev->wiphy.coverage_class;
1633
1634                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1635                         rdev->wiphy.retry_short = retry_short;
1636                 if (changed & WIPHY_PARAM_RETRY_LONG)
1637                         rdev->wiphy.retry_long = retry_long;
1638                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1639                         rdev->wiphy.frag_threshold = frag_threshold;
1640                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1641                         rdev->wiphy.rts_threshold = rts_threshold;
1642                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1643                         rdev->wiphy.coverage_class = coverage_class;
1644
1645                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1646                 if (result) {
1647                         rdev->wiphy.retry_short = old_retry_short;
1648                         rdev->wiphy.retry_long = old_retry_long;
1649                         rdev->wiphy.frag_threshold = old_frag_threshold;
1650                         rdev->wiphy.rts_threshold = old_rts_threshold;
1651                         rdev->wiphy.coverage_class = old_coverage_class;
1652                 }
1653         }
1654
1655  bad_res:
1656         mutex_unlock(&rdev->mtx);
1657         if (netdev)
1658                 dev_put(netdev);
1659         return result;
1660 }
1661
1662
1663 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1664                               struct cfg80211_registered_device *rdev,
1665                               struct net_device *dev)
1666 {
1667         void *hdr;
1668
1669         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1670         if (!hdr)
1671                 return -1;
1672
1673         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1674             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1675             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1676             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1677                         dev->ieee80211_ptr->iftype) ||
1678             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1679                         rdev->devlist_generation ^
1680                         (cfg80211_rdev_list_generation << 2)))
1681                 goto nla_put_failure;
1682
1683         if (rdev->ops->get_channel) {
1684                 struct ieee80211_channel *chan;
1685                 enum nl80211_channel_type channel_type;
1686
1687                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1688                 if (chan &&
1689                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1690                                     chan->center_freq) ||
1691                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1692                                     channel_type)))
1693                         goto nla_put_failure;
1694         }
1695
1696         return genlmsg_end(msg, hdr);
1697
1698  nla_put_failure:
1699         genlmsg_cancel(msg, hdr);
1700         return -EMSGSIZE;
1701 }
1702
1703 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1704 {
1705         int wp_idx = 0;
1706         int if_idx = 0;
1707         int wp_start = cb->args[0];
1708         int if_start = cb->args[1];
1709         struct cfg80211_registered_device *rdev;
1710         struct wireless_dev *wdev;
1711
1712         mutex_lock(&cfg80211_mutex);
1713         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1714                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1715                         continue;
1716                 if (wp_idx < wp_start) {
1717                         wp_idx++;
1718                         continue;
1719                 }
1720                 if_idx = 0;
1721
1722                 mutex_lock(&rdev->devlist_mtx);
1723                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1724                         if (if_idx < if_start) {
1725                                 if_idx++;
1726                                 continue;
1727                         }
1728                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1729                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1730                                                rdev, wdev->netdev) < 0) {
1731                                 mutex_unlock(&rdev->devlist_mtx);
1732                                 goto out;
1733                         }
1734                         if_idx++;
1735                 }
1736                 mutex_unlock(&rdev->devlist_mtx);
1737
1738                 wp_idx++;
1739         }
1740  out:
1741         mutex_unlock(&cfg80211_mutex);
1742
1743         cb->args[0] = wp_idx;
1744         cb->args[1] = if_idx;
1745
1746         return skb->len;
1747 }
1748
1749 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1750 {
1751         struct sk_buff *msg;
1752         struct cfg80211_registered_device *dev = info->user_ptr[0];
1753         struct net_device *netdev = info->user_ptr[1];
1754
1755         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1756         if (!msg)
1757                 return -ENOMEM;
1758
1759         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1760                                dev, netdev) < 0) {
1761                 nlmsg_free(msg);
1762                 return -ENOBUFS;
1763         }
1764
1765         return genlmsg_reply(msg, info);
1766 }
1767
1768 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1769         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1770         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1771         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1772         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1773         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1774 };
1775
1776 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1777 {
1778         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1779         int flag;
1780
1781         *mntrflags = 0;
1782
1783         if (!nla)
1784                 return -EINVAL;
1785
1786         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1787                              nla, mntr_flags_policy))
1788                 return -EINVAL;
1789
1790         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1791                 if (flags[flag])
1792                         *mntrflags |= (1<<flag);
1793
1794         return 0;
1795 }
1796
1797 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1798                                struct net_device *netdev, u8 use_4addr,
1799                                enum nl80211_iftype iftype)
1800 {
1801         if (!use_4addr) {
1802                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1803                         return -EBUSY;
1804                 return 0;
1805         }
1806
1807         switch (iftype) {
1808         case NL80211_IFTYPE_AP_VLAN:
1809                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1810                         return 0;
1811                 break;
1812         case NL80211_IFTYPE_STATION:
1813                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1814                         return 0;
1815                 break;
1816         default:
1817                 break;
1818         }
1819
1820         return -EOPNOTSUPP;
1821 }
1822
1823 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1824 {
1825         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1826         struct vif_params params;
1827         int err;
1828         enum nl80211_iftype otype, ntype;
1829         struct net_device *dev = info->user_ptr[1];
1830         u32 _flags, *flags = NULL;
1831         bool change = false;
1832
1833         memset(&params, 0, sizeof(params));
1834
1835         otype = ntype = dev->ieee80211_ptr->iftype;
1836
1837         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1838                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1839                 if (otype != ntype)
1840                         change = true;
1841                 if (ntype > NL80211_IFTYPE_MAX)
1842                         return -EINVAL;
1843         }
1844
1845         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1846                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1847
1848                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1849                         return -EINVAL;
1850                 if (netif_running(dev))
1851                         return -EBUSY;
1852
1853                 wdev_lock(wdev);
1854                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1855                              IEEE80211_MAX_MESH_ID_LEN);
1856                 wdev->mesh_id_up_len =
1857                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1858                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1859                        wdev->mesh_id_up_len);
1860                 wdev_unlock(wdev);
1861         }
1862
1863         if (info->attrs[NL80211_ATTR_4ADDR]) {
1864                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1865                 change = true;
1866                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1867                 if (err)
1868                         return err;
1869         } else {
1870                 params.use_4addr = -1;
1871         }
1872
1873         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1874                 if (ntype != NL80211_IFTYPE_MONITOR)
1875                         return -EINVAL;
1876                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1877                                           &_flags);
1878                 if (err)
1879                         return err;
1880
1881                 flags = &_flags;
1882                 change = true;
1883         }
1884
1885         if (change)
1886                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1887         else
1888                 err = 0;
1889
1890         if (!err && params.use_4addr != -1)
1891                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1892
1893         return err;
1894 }
1895
1896 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1897 {
1898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1899         struct vif_params params;
1900         struct net_device *dev;
1901         int err;
1902         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1903         u32 flags;
1904
1905         memset(&params, 0, sizeof(params));
1906
1907         if (!info->attrs[NL80211_ATTR_IFNAME])
1908                 return -EINVAL;
1909
1910         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1911                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1912                 if (type > NL80211_IFTYPE_MAX)
1913                         return -EINVAL;
1914         }
1915
1916         if (!rdev->ops->add_virtual_intf ||
1917             !(rdev->wiphy.interface_modes & (1 << type)))
1918                 return -EOPNOTSUPP;
1919
1920         if (info->attrs[NL80211_ATTR_4ADDR]) {
1921                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1922                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1923                 if (err)
1924                         return err;
1925         }
1926
1927         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1928                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1929                                   &flags);
1930         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1931                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1932                 type, err ? NULL : &flags, &params);
1933         if (IS_ERR(dev))
1934                 return PTR_ERR(dev);
1935
1936         if (type == NL80211_IFTYPE_MESH_POINT &&
1937             info->attrs[NL80211_ATTR_MESH_ID]) {
1938                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1939
1940                 wdev_lock(wdev);
1941                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1942                              IEEE80211_MAX_MESH_ID_LEN);
1943                 wdev->mesh_id_up_len =
1944                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1945                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1946                        wdev->mesh_id_up_len);
1947                 wdev_unlock(wdev);
1948         }
1949
1950         return 0;
1951 }
1952
1953 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1954 {
1955         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1956         struct net_device *dev = info->user_ptr[1];
1957
1958         if (!rdev->ops->del_virtual_intf)
1959                 return -EOPNOTSUPP;
1960
1961         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1962 }
1963
1964 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1965 {
1966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1967         struct net_device *dev = info->user_ptr[1];
1968         u16 noack_map;
1969
1970         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1971                 return -EINVAL;
1972
1973         if (!rdev->ops->set_noack_map)
1974                 return -EOPNOTSUPP;
1975
1976         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1977
1978         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1979 }
1980
1981 struct get_key_cookie {
1982         struct sk_buff *msg;
1983         int error;
1984         int idx;
1985 };
1986
1987 static void get_key_callback(void *c, struct key_params *params)
1988 {
1989         struct nlattr *key;
1990         struct get_key_cookie *cookie = c;
1991
1992         if ((params->key &&
1993              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1994                      params->key_len, params->key)) ||
1995             (params->seq &&
1996              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1997                      params->seq_len, params->seq)) ||
1998             (params->cipher &&
1999              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2000                          params->cipher)))
2001                 goto nla_put_failure;
2002
2003         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2004         if (!key)
2005                 goto nla_put_failure;
2006
2007         if ((params->key &&
2008              nla_put(cookie->msg, NL80211_KEY_DATA,
2009                      params->key_len, params->key)) ||
2010             (params->seq &&
2011              nla_put(cookie->msg, NL80211_KEY_SEQ,
2012                      params->seq_len, params->seq)) ||
2013             (params->cipher &&
2014              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2015                          params->cipher)))
2016                 goto nla_put_failure;
2017
2018         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2019                 goto nla_put_failure;
2020
2021         nla_nest_end(cookie->msg, key);
2022
2023         return;
2024  nla_put_failure:
2025         cookie->error = 1;
2026 }
2027
2028 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2029 {
2030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2031         int err;
2032         struct net_device *dev = info->user_ptr[1];
2033         u8 key_idx = 0;
2034         const u8 *mac_addr = NULL;
2035         bool pairwise;
2036         struct get_key_cookie cookie = {
2037                 .error = 0,
2038         };
2039         void *hdr;
2040         struct sk_buff *msg;
2041
2042         if (info->attrs[NL80211_ATTR_KEY_IDX])
2043                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2044
2045         if (key_idx > 5)
2046                 return -EINVAL;
2047
2048         if (info->attrs[NL80211_ATTR_MAC])
2049                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2050
2051         pairwise = !!mac_addr;
2052         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2053                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2054                 if (kt >= NUM_NL80211_KEYTYPES)
2055                         return -EINVAL;
2056                 if (kt != NL80211_KEYTYPE_GROUP &&
2057                     kt != NL80211_KEYTYPE_PAIRWISE)
2058                         return -EINVAL;
2059                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2060         }
2061
2062         if (!rdev->ops->get_key)
2063                 return -EOPNOTSUPP;
2064
2065         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2066         if (!msg)
2067                 return -ENOMEM;
2068
2069         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2070                              NL80211_CMD_NEW_KEY);
2071         if (IS_ERR(hdr))
2072                 return PTR_ERR(hdr);
2073
2074         cookie.msg = msg;
2075         cookie.idx = key_idx;
2076
2077         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2078             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2079                 goto nla_put_failure;
2080         if (mac_addr &&
2081             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2082                 goto nla_put_failure;
2083
2084         if (pairwise && mac_addr &&
2085             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2086                 return -ENOENT;
2087
2088         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2089                                  mac_addr, &cookie, get_key_callback);
2090
2091         if (err)
2092                 goto free_msg;
2093
2094         if (cookie.error)
2095                 goto nla_put_failure;
2096
2097         genlmsg_end(msg, hdr);
2098         return genlmsg_reply(msg, info);
2099
2100  nla_put_failure:
2101         err = -ENOBUFS;
2102  free_msg:
2103         nlmsg_free(msg);
2104         return err;
2105 }
2106
2107 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2108 {
2109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2110         struct key_parse key;
2111         int err;
2112         struct net_device *dev = info->user_ptr[1];
2113
2114         err = nl80211_parse_key(info, &key);
2115         if (err)
2116                 return err;
2117
2118         if (key.idx < 0)
2119                 return -EINVAL;
2120
2121         /* only support setting default key */
2122         if (!key.def && !key.defmgmt)
2123                 return -EINVAL;
2124
2125         wdev_lock(dev->ieee80211_ptr);
2126
2127         if (key.def) {
2128                 if (!rdev->ops->set_default_key) {
2129                         err = -EOPNOTSUPP;
2130                         goto out;
2131                 }
2132
2133                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2134                 if (err)
2135                         goto out;
2136
2137                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2138                                                  key.def_uni, key.def_multi);
2139
2140                 if (err)
2141                         goto out;
2142
2143 #ifdef CONFIG_CFG80211_WEXT
2144                 dev->ieee80211_ptr->wext.default_key = key.idx;
2145 #endif
2146         } else {
2147                 if (key.def_uni || !key.def_multi) {
2148                         err = -EINVAL;
2149                         goto out;
2150                 }
2151
2152                 if (!rdev->ops->set_default_mgmt_key) {
2153                         err = -EOPNOTSUPP;
2154                         goto out;
2155                 }
2156
2157                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2158                 if (err)
2159                         goto out;
2160
2161                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2162                                                       dev, key.idx);
2163                 if (err)
2164                         goto out;
2165
2166 #ifdef CONFIG_CFG80211_WEXT
2167                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2168 #endif
2169         }
2170
2171  out:
2172         wdev_unlock(dev->ieee80211_ptr);
2173
2174         return err;
2175 }
2176
2177 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2178 {
2179         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2180         int err;
2181         struct net_device *dev = info->user_ptr[1];
2182         struct key_parse key;
2183         const u8 *mac_addr = NULL;
2184
2185         err = nl80211_parse_key(info, &key);
2186         if (err)
2187                 return err;
2188
2189         if (!key.p.key)
2190                 return -EINVAL;
2191
2192         if (info->attrs[NL80211_ATTR_MAC])
2193                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2194
2195         if (key.type == -1) {
2196                 if (mac_addr)
2197                         key.type = NL80211_KEYTYPE_PAIRWISE;
2198                 else
2199                         key.type = NL80211_KEYTYPE_GROUP;
2200         }
2201
2202         /* for now */
2203         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2204             key.type != NL80211_KEYTYPE_GROUP)
2205                 return -EINVAL;
2206
2207         if (!rdev->ops->add_key)
2208                 return -EOPNOTSUPP;
2209
2210         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2211                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2212                                            mac_addr))
2213                 return -EINVAL;
2214
2215         wdev_lock(dev->ieee80211_ptr);
2216         err = nl80211_key_allowed(dev->ieee80211_ptr);
2217         if (!err)
2218                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2219                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2220                                          mac_addr, &key.p);
2221         wdev_unlock(dev->ieee80211_ptr);
2222
2223         return err;
2224 }
2225
2226 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2227 {
2228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2229         int err;
2230         struct net_device *dev = info->user_ptr[1];
2231         u8 *mac_addr = NULL;
2232         struct key_parse key;
2233
2234         err = nl80211_parse_key(info, &key);
2235         if (err)
2236                 return err;
2237
2238         if (info->attrs[NL80211_ATTR_MAC])
2239                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2240
2241         if (key.type == -1) {
2242                 if (mac_addr)
2243                         key.type = NL80211_KEYTYPE_PAIRWISE;
2244                 else
2245                         key.type = NL80211_KEYTYPE_GROUP;
2246         }
2247
2248         /* for now */
2249         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2250             key.type != NL80211_KEYTYPE_GROUP)
2251                 return -EINVAL;
2252
2253         if (!rdev->ops->del_key)
2254                 return -EOPNOTSUPP;
2255
2256         wdev_lock(dev->ieee80211_ptr);
2257         err = nl80211_key_allowed(dev->ieee80211_ptr);
2258
2259         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2260             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2261                 err = -ENOENT;
2262
2263         if (!err)
2264                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2265                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2266                                          mac_addr);
2267
2268 #ifdef CONFIG_CFG80211_WEXT
2269         if (!err) {
2270                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2271                         dev->ieee80211_ptr->wext.default_key = -1;
2272                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2273                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2274         }
2275 #endif
2276         wdev_unlock(dev->ieee80211_ptr);
2277
2278         return err;
2279 }
2280
2281 static int nl80211_parse_beacon(struct genl_info *info,
2282                                 struct cfg80211_beacon_data *bcn)
2283 {
2284         bool haveinfo = false;
2285
2286         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2287             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2288             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2289             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2290                 return -EINVAL;
2291
2292         memset(bcn, 0, sizeof(*bcn));
2293
2294         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2295                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2296                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2297                 if (!bcn->head_len)
2298                         return -EINVAL;
2299                 haveinfo = true;
2300         }
2301
2302         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2303                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2304                 bcn->tail_len =
2305                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2306                 haveinfo = true;
2307         }
2308
2309         if (!haveinfo)
2310                 return -EINVAL;
2311
2312         if (info->attrs[NL80211_ATTR_IE]) {
2313                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2314                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2315         }
2316
2317         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2318                 bcn->proberesp_ies =
2319                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2320                 bcn->proberesp_ies_len =
2321                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2322         }
2323
2324         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2325                 bcn->assocresp_ies =
2326                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2327                 bcn->assocresp_ies_len =
2328                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2329         }
2330
2331         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2332                 bcn->probe_resp =
2333                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2334                 bcn->probe_resp_len =
2335                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2336         }
2337
2338         return 0;
2339 }
2340
2341 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2342                                    struct cfg80211_ap_settings *params)
2343 {
2344         struct wireless_dev *wdev;
2345         bool ret = false;
2346
2347         mutex_lock(&rdev->devlist_mtx);
2348
2349         list_for_each_entry(wdev, &rdev->netdev_list, list) {
2350                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2351                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2352                         continue;
2353
2354                 if (!wdev->preset_chan)
2355                         continue;
2356
2357                 params->channel = wdev->preset_chan;
2358                 params->channel_type = wdev->preset_chantype;
2359                 ret = true;
2360                 break;
2361         }
2362
2363         mutex_unlock(&rdev->devlist_mtx);
2364
2365         return ret;
2366 }
2367
2368 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2369 {
2370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2371         struct net_device *dev = info->user_ptr[1];
2372         struct wireless_dev *wdev = dev->ieee80211_ptr;
2373         struct cfg80211_ap_settings params;
2374         int err;
2375
2376         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2377             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2378                 return -EOPNOTSUPP;
2379
2380         if (!rdev->ops->start_ap)
2381                 return -EOPNOTSUPP;
2382
2383         if (wdev->beacon_interval)
2384                 return -EALREADY;
2385
2386         memset(&params, 0, sizeof(params));
2387
2388         /* these are required for START_AP */
2389         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2390             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2391             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2392                 return -EINVAL;
2393
2394         err = nl80211_parse_beacon(info, &params.beacon);
2395         if (err)
2396                 return err;
2397
2398         params.beacon_interval =
2399                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2400         params.dtim_period =
2401                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2402
2403         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2404         if (err)
2405                 return err;
2406
2407         /*
2408          * In theory, some of these attributes should be required here
2409          * but since they were not used when the command was originally
2410          * added, keep them optional for old user space programs to let
2411          * them continue to work with drivers that do not need the
2412          * additional information -- drivers must check!
2413          */
2414         if (info->attrs[NL80211_ATTR_SSID]) {
2415                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2416                 params.ssid_len =
2417                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2418                 if (params.ssid_len == 0 ||
2419                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2420                         return -EINVAL;
2421         }
2422
2423         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2424                 params.hidden_ssid = nla_get_u32(
2425                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2426                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2427                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2428                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2429                         return -EINVAL;
2430         }
2431
2432         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2433
2434         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2435                 params.auth_type = nla_get_u32(
2436                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2437                 if (!nl80211_valid_auth_type(params.auth_type))
2438                         return -EINVAL;
2439         } else
2440                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2441
2442         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2443                                       NL80211_MAX_NR_CIPHER_SUITES);
2444         if (err)
2445                 return err;
2446
2447         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2448                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2449                         return -EOPNOTSUPP;
2450                 params.inactivity_timeout = nla_get_u16(
2451                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2452         }
2453
2454         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2455                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2456
2457                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2458                     !nl80211_valid_channel_type(info, &channel_type))
2459                         return -EINVAL;
2460
2461                 params.channel = rdev_freq_to_chan(rdev,
2462                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2463                         channel_type);
2464                 if (!params.channel)
2465                         return -EINVAL;
2466                 params.channel_type = channel_type;
2467         } else if (wdev->preset_chan) {
2468                 params.channel = wdev->preset_chan;
2469                 params.channel_type = wdev->preset_chantype;
2470         } else if (!nl80211_get_ap_channel(rdev, &params))
2471                 return -EINVAL;
2472
2473         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2474                                           params.channel_type))
2475                 return -EINVAL;
2476
2477         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2478         if (!err) {
2479                 wdev->preset_chan = params.channel;
2480                 wdev->preset_chantype = params.channel_type;
2481                 wdev->beacon_interval = params.beacon_interval;
2482         }
2483         return err;
2484 }
2485
2486 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2487 {
2488         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2489         struct net_device *dev = info->user_ptr[1];
2490         struct wireless_dev *wdev = dev->ieee80211_ptr;
2491         struct cfg80211_beacon_data params;
2492         int err;
2493
2494         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2495             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2496                 return -EOPNOTSUPP;
2497
2498         if (!rdev->ops->change_beacon)
2499                 return -EOPNOTSUPP;
2500
2501         if (!wdev->beacon_interval)
2502                 return -EINVAL;
2503
2504         err = nl80211_parse_beacon(info, &params);
2505         if (err)
2506                 return err;
2507
2508         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2509 }
2510
2511 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2512 {
2513         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2514         struct net_device *dev = info->user_ptr[1];
2515         struct wireless_dev *wdev = dev->ieee80211_ptr;
2516         int err;
2517
2518         if (!rdev->ops->stop_ap)
2519                 return -EOPNOTSUPP;
2520
2521         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2522             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2523                 return -EOPNOTSUPP;
2524
2525         if (!wdev->beacon_interval)
2526                 return -ENOENT;
2527
2528         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2529         if (!err)
2530                 wdev->beacon_interval = 0;
2531         return err;
2532 }
2533
2534 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2535         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2536         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2537         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2538         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2539         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2540         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2541 };
2542
2543 static int parse_station_flags(struct genl_info *info,
2544                                enum nl80211_iftype iftype,
2545                                struct station_parameters *params)
2546 {
2547         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2548         struct nlattr *nla;
2549         int flag;
2550
2551         /*
2552          * Try parsing the new attribute first so userspace
2553          * can specify both for older kernels.
2554          */
2555         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2556         if (nla) {
2557                 struct nl80211_sta_flag_update *sta_flags;
2558
2559                 sta_flags = nla_data(nla);
2560                 params->sta_flags_mask = sta_flags->mask;
2561                 params->sta_flags_set = sta_flags->set;
2562                 if ((params->sta_flags_mask |
2563                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2564                         return -EINVAL;
2565                 return 0;
2566         }
2567
2568         /* if present, parse the old attribute */
2569
2570         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2571         if (!nla)
2572                 return 0;
2573
2574         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2575                              nla, sta_flags_policy))
2576                 return -EINVAL;
2577
2578         /*
2579          * Only allow certain flags for interface types so that
2580          * other attributes are silently ignored. Remember that
2581          * this is backward compatibility code with old userspace
2582          * and shouldn't be hit in other cases anyway.
2583          */
2584         switch (iftype) {
2585         case NL80211_IFTYPE_AP:
2586         case NL80211_IFTYPE_AP_VLAN:
2587         case NL80211_IFTYPE_P2P_GO:
2588                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2589                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2590                                          BIT(NL80211_STA_FLAG_WME) |
2591                                          BIT(NL80211_STA_FLAG_MFP);
2592                 break;
2593         case NL80211_IFTYPE_P2P_CLIENT:
2594         case NL80211_IFTYPE_STATION:
2595                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2596                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2597                 break;
2598         case NL80211_IFTYPE_MESH_POINT:
2599                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2600                                          BIT(NL80211_STA_FLAG_MFP) |
2601                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2602         default:
2603                 return -EINVAL;
2604         }
2605
2606         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2607                 if (flags[flag]) {
2608                         params->sta_flags_set |= (1<<flag);
2609
2610                         /* no longer support new API additions in old API */
2611                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2612                                 return -EINVAL;
2613                 }
2614         }
2615
2616         return 0;
2617 }
2618
2619 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2620                                  int attr)
2621 {
2622         struct nlattr *rate;
2623         u16 bitrate;
2624
2625         rate = nla_nest_start(msg, attr);
2626         if (!rate)
2627                 goto nla_put_failure;
2628
2629         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2630         bitrate = cfg80211_calculate_bitrate(info);
2631         if ((bitrate > 0 &&
2632              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2633             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2634              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2635             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2636              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2637             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2638              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2639                 goto nla_put_failure;
2640
2641         nla_nest_end(msg, rate);
2642         return true;
2643
2644 nla_put_failure:
2645         return false;
2646 }
2647
2648 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2649                                 int flags,
2650                                 struct cfg80211_registered_device *rdev,
2651                                 struct net_device *dev,
2652                                 const u8 *mac_addr, struct station_info *sinfo)
2653 {
2654         void *hdr;
2655         struct nlattr *sinfoattr, *bss_param;
2656
2657         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2658         if (!hdr)
2659                 return -1;
2660
2661         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2662             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2663             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2664                 goto nla_put_failure;
2665
2666         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2667         if (!sinfoattr)
2668                 goto nla_put_failure;
2669         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2670             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2671                         sinfo->connected_time))
2672                 goto nla_put_failure;
2673         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2674             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2675                         sinfo->inactive_time))
2676                 goto nla_put_failure;
2677         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2678             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2679                         sinfo->rx_bytes))
2680                 goto nla_put_failure;
2681         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2682             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2683                         sinfo->tx_bytes))
2684                 goto nla_put_failure;
2685         if ((sinfo->filled & STATION_INFO_LLID) &&
2686             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2687                 goto nla_put_failure;
2688         if ((sinfo->filled & STATION_INFO_PLID) &&
2689             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2690                 goto nla_put_failure;
2691         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2692             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2693                        sinfo->plink_state))
2694                 goto nla_put_failure;
2695         switch (rdev->wiphy.signal_type) {
2696         case CFG80211_SIGNAL_TYPE_MBM:
2697                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2698                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2699                                sinfo->signal))
2700                         goto nla_put_failure;
2701                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2702                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2703                                sinfo->signal_avg))
2704                         goto nla_put_failure;
2705                 break;
2706         default:
2707                 break;
2708         }
2709         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2710                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2711                                           NL80211_STA_INFO_TX_BITRATE))
2712                         goto nla_put_failure;
2713         }
2714         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2715                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2716                                           NL80211_STA_INFO_RX_BITRATE))
2717                         goto nla_put_failure;
2718         }
2719         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2720             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2721                         sinfo->rx_packets))
2722                 goto nla_put_failure;
2723         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2724             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2725                         sinfo->tx_packets))
2726                 goto nla_put_failure;
2727         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2728             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2729                         sinfo->tx_retries))
2730                 goto nla_put_failure;
2731         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2732             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2733                         sinfo->tx_failed))
2734                 goto nla_put_failure;
2735         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2736             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2737                         sinfo->beacon_loss_count))
2738                 goto nla_put_failure;
2739         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2740                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2741                 if (!bss_param)
2742                         goto nla_put_failure;
2743
2744                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2745                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2746                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2747                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2748                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2749                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2750                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2751                                sinfo->bss_param.dtim_period) ||
2752                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2753                                 sinfo->bss_param.beacon_interval))
2754                         goto nla_put_failure;
2755
2756                 nla_nest_end(msg, bss_param);
2757         }
2758         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2759             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2760                     sizeof(struct nl80211_sta_flag_update),
2761                     &sinfo->sta_flags))
2762                 goto nla_put_failure;
2763         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2764                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2765                             sinfo->t_offset))
2766                 goto nla_put_failure;
2767         nla_nest_end(msg, sinfoattr);
2768
2769         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2770             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2771                     sinfo->assoc_req_ies))
2772                 goto nla_put_failure;
2773
2774         return genlmsg_end(msg, hdr);
2775
2776  nla_put_failure:
2777         genlmsg_cancel(msg, hdr);
2778         return -EMSGSIZE;
2779 }
2780
2781 static int nl80211_dump_station(struct sk_buff *skb,
2782                                 struct netlink_callback *cb)
2783 {
2784         struct station_info sinfo;
2785         struct cfg80211_registered_device *dev;
2786         struct net_device *netdev;
2787         u8 mac_addr[ETH_ALEN];
2788         int sta_idx = cb->args[1];
2789         int err;
2790
2791         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2792         if (err)
2793                 return err;
2794
2795         if (!dev->ops->dump_station) {
2796                 err = -EOPNOTSUPP;
2797                 goto out_err;
2798         }
2799
2800         while (1) {
2801                 memset(&sinfo, 0, sizeof(sinfo));
2802                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2803                                              mac_addr, &sinfo);
2804                 if (err == -ENOENT)
2805                         break;
2806                 if (err)
2807                         goto out_err;
2808
2809                 if (nl80211_send_station(skb,
2810                                 NETLINK_CB(cb->skb).pid,
2811                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2812                                 dev, netdev, mac_addr,
2813                                 &sinfo) < 0)
2814                         goto out;
2815
2816                 sta_idx++;
2817         }
2818
2819
2820  out:
2821         cb->args[1] = sta_idx;
2822         err = skb->len;
2823  out_err:
2824         nl80211_finish_netdev_dump(dev);
2825
2826         return err;
2827 }
2828
2829 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2830 {
2831         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2832         struct net_device *dev = info->user_ptr[1];
2833         struct station_info sinfo;
2834         struct sk_buff *msg;
2835         u8 *mac_addr = NULL;
2836         int err;
2837
2838         memset(&sinfo, 0, sizeof(sinfo));
2839
2840         if (!info->attrs[NL80211_ATTR_MAC])
2841                 return -EINVAL;
2842
2843         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2844
2845         if (!rdev->ops->get_station)
2846                 return -EOPNOTSUPP;
2847
2848         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2849         if (err)
2850                 return err;
2851
2852         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2853         if (!msg)
2854                 return -ENOMEM;
2855
2856         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2857                                  rdev, dev, mac_addr, &sinfo) < 0) {
2858                 nlmsg_free(msg);
2859                 return -ENOBUFS;
2860         }
2861
2862         return genlmsg_reply(msg, info);
2863 }
2864
2865 /*
2866  * Get vlan interface making sure it is running and on the right wiphy.
2867  */
2868 static struct net_device *get_vlan(struct genl_info *info,
2869                                    struct cfg80211_registered_device *rdev)
2870 {
2871         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2872         struct net_device *v;
2873         int ret;
2874
2875         if (!vlanattr)
2876                 return NULL;
2877
2878         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2879         if (!v)
2880                 return ERR_PTR(-ENODEV);
2881
2882         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2883                 ret = -EINVAL;
2884                 goto error;
2885         }
2886
2887         if (!netif_running(v)) {
2888                 ret = -ENETDOWN;
2889                 goto error;
2890         }
2891
2892         return v;
2893  error:
2894         dev_put(v);
2895         return ERR_PTR(ret);
2896 }
2897
2898 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2899 {
2900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2901         int err;
2902         struct net_device *dev = info->user_ptr[1];
2903         struct station_parameters params;
2904         u8 *mac_addr = NULL;
2905
2906         memset(&params, 0, sizeof(params));
2907
2908         params.listen_interval = -1;
2909         params.plink_state = -1;
2910
2911         if (info->attrs[NL80211_ATTR_STA_AID])
2912                 return -EINVAL;
2913
2914         if (!info->attrs[NL80211_ATTR_MAC])
2915                 return -EINVAL;
2916
2917         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2918
2919         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2920                 params.supported_rates =
2921                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2922                 params.supported_rates_len =
2923                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2924         }
2925
2926         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2927                 params.listen_interval =
2928                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2929
2930         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2931                 params.ht_capa =
2932                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2933
2934         if (!rdev->ops->change_station)
2935                 return -EOPNOTSUPP;
2936
2937         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2938                 return -EINVAL;
2939
2940         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2941                 params.plink_action =
2942                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2943
2944         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2945                 params.plink_state =
2946                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2947
2948         switch (dev->ieee80211_ptr->iftype) {
2949         case NL80211_IFTYPE_AP:
2950         case NL80211_IFTYPE_AP_VLAN:
2951         case NL80211_IFTYPE_P2P_GO:
2952                 /* disallow mesh-specific things */
2953                 if (params.plink_action)
2954                         return -EINVAL;
2955
2956                 /* TDLS can't be set, ... */
2957                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2958                         return -EINVAL;
2959                 /*
2960                  * ... but don't bother the driver with it. This works around
2961                  * a hostapd/wpa_supplicant issue -- it always includes the
2962                  * TLDS_PEER flag in the mask even for AP mode.
2963                  */
2964                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2965
2966                 /* accept only the listed bits */
2967                 if (params.sta_flags_mask &
2968                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2969                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2970                                   BIT(NL80211_STA_FLAG_WME) |
2971                                   BIT(NL80211_STA_FLAG_MFP)))
2972                         return -EINVAL;
2973
2974                 /* must be last in here for error handling */
2975                 params.vlan = get_vlan(info, rdev);
2976                 if (IS_ERR(params.vlan))
2977                         return PTR_ERR(params.vlan);
2978                 break;
2979         case NL80211_IFTYPE_P2P_CLIENT:
2980         case NL80211_IFTYPE_STATION:
2981                 /*
2982                  * Don't allow userspace to change the TDLS_PEER flag,
2983                  * but silently ignore attempts to change it since we
2984                  * don't have state here to verify that it doesn't try
2985                  * to change the flag.
2986                  */
2987                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2988                 /* fall through */
2989         case NL80211_IFTYPE_ADHOC:
2990                 /* disallow things sta doesn't support */
2991                 if (params.plink_action)
2992                         return -EINVAL;
2993                 if (params.ht_capa)
2994                         return -EINVAL;
2995                 if (params.listen_interval >= 0)
2996                         return -EINVAL;
2997                 /* reject any changes other than AUTHORIZED */
2998                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2999                         return -EINVAL;
3000                 break;
3001         case NL80211_IFTYPE_MESH_POINT:
3002                 /* disallow things mesh doesn't support */
3003                 if (params.vlan)
3004                         return -EINVAL;
3005                 if (params.ht_capa)
3006                         return -EINVAL;
3007                 if (params.listen_interval >= 0)
3008                         return -EINVAL;
3009                 /*
3010                  * No special handling for TDLS here -- the userspace
3011                  * mesh code doesn't have this bug.
3012                  */
3013                 if (params.sta_flags_mask &
3014                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3015                                   BIT(NL80211_STA_FLAG_MFP) |
3016                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3017                         return -EINVAL;
3018                 break;
3019         default:
3020                 return -EOPNOTSUPP;
3021         }
3022
3023         /* be aware of params.vlan when changing code here */
3024
3025         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3026
3027         if (params.vlan)
3028                 dev_put(params.vlan);
3029
3030         return err;
3031 }
3032
3033 static struct nla_policy
3034 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3035         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3036         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3037 };
3038
3039 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3040 {
3041         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3042         int err;
3043         struct net_device *dev = info->user_ptr[1];
3044         struct station_parameters params;
3045         u8 *mac_addr = NULL;
3046
3047         memset(&params, 0, sizeof(params));
3048
3049         if (!info->attrs[NL80211_ATTR_MAC])
3050                 return -EINVAL;
3051
3052         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3053                 return -EINVAL;
3054
3055         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3056                 return -EINVAL;
3057
3058         if (!info->attrs[NL80211_ATTR_STA_AID])
3059                 return -EINVAL;
3060
3061         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3062         params.supported_rates =
3063                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3064         params.supported_rates_len =
3065                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3066         params.listen_interval =
3067                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3068
3069         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3070         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3071                 return -EINVAL;
3072
3073         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3074                 params.ht_capa =
3075                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3076
3077         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3078                 params.plink_action =
3079                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3080
3081         if (!rdev->ops->add_station)
3082                 return -EOPNOTSUPP;
3083
3084         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3085                 return -EINVAL;
3086
3087         switch (dev->ieee80211_ptr->iftype) {
3088         case NL80211_IFTYPE_AP:
3089         case NL80211_IFTYPE_AP_VLAN:
3090         case NL80211_IFTYPE_P2P_GO:
3091                 /* parse WME attributes if sta is WME capable */
3092                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3093                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3094                     info->attrs[NL80211_ATTR_STA_WME]) {
3095                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3096                         struct nlattr *nla;
3097
3098                         nla = info->attrs[NL80211_ATTR_STA_WME];
3099                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3100                                                nl80211_sta_wme_policy);
3101                         if (err)
3102                                 return err;
3103
3104                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3105                                 params.uapsd_queues =
3106                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3107                         if (params.uapsd_queues &
3108                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3109                                 return -EINVAL;
3110
3111                         if (tb[NL80211_STA_WME_MAX_SP])
3112                                 params.max_sp =
3113                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3114
3115                         if (params.max_sp &
3116                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3117                                 return -EINVAL;
3118
3119                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3120                 }
3121                 /* TDLS peers cannot be added */
3122                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3123                         return -EINVAL;
3124                 /* but don't bother the driver with it */
3125                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3126
3127                 /* must be last in here for error handling */
3128                 params.vlan = get_vlan(info, rdev);
3129                 if (IS_ERR(params.vlan))
3130                         return PTR_ERR(params.vlan);
3131                 break;
3132         case NL80211_IFTYPE_MESH_POINT:
3133                 /* TDLS peers cannot be added */
3134                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3135                         return -EINVAL;
3136                 break;
3137         case NL80211_IFTYPE_STATION:
3138                 /* Only TDLS peers can be added */
3139                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3140                         return -EINVAL;
3141                 /* Can only add if TDLS ... */
3142                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3143                         return -EOPNOTSUPP;
3144                 /* ... with external setup is supported */
3145                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3146                         return -EOPNOTSUPP;
3147                 break;
3148         default:
3149                 return -EOPNOTSUPP;
3150         }
3151
3152         /* be aware of params.vlan when changing code here */
3153
3154         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3155
3156         if (params.vlan)
3157                 dev_put(params.vlan);
3158         return err;
3159 }
3160
3161 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3162 {
3163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3164         struct net_device *dev = info->user_ptr[1];
3165         u8 *mac_addr = NULL;
3166
3167         if (info->attrs[NL80211_ATTR_MAC])
3168                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3169
3170         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3171             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3172             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3173             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3174                 return -EINVAL;
3175
3176         if (!rdev->ops->del_station)
3177                 return -EOPNOTSUPP;
3178
3179         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3180 }
3181
3182 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3183                                 int flags, struct net_device *dev,
3184                                 u8 *dst, u8 *next_hop,
3185                                 struct mpath_info *pinfo)
3186 {
3187         void *hdr;
3188         struct nlattr *pinfoattr;
3189
3190         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3191         if (!hdr)
3192                 return -1;
3193
3194         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3195             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3196             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3197             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3198                 goto nla_put_failure;
3199
3200         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3201         if (!pinfoattr)
3202                 goto nla_put_failure;
3203         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3204             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3205                         pinfo->frame_qlen))
3206                 goto nla_put_failure;
3207         if (((pinfo->filled & MPATH_INFO_SN) &&
3208              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3209             ((pinfo->filled & MPATH_INFO_METRIC) &&
3210              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3211                          pinfo->metric)) ||
3212             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3213              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3214                          pinfo->exptime)) ||
3215             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3216              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3217                         pinfo->flags)) ||
3218             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3219              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3220                          pinfo->discovery_timeout)) ||
3221             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3222              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3223                         pinfo->discovery_retries)))
3224                 goto nla_put_failure;
3225
3226         nla_nest_end(msg, pinfoattr);
3227
3228         return genlmsg_end(msg, hdr);
3229
3230  nla_put_failure:
3231         genlmsg_cancel(msg, hdr);
3232         return -EMSGSIZE;
3233 }
3234
3235 static int nl80211_dump_mpath(struct sk_buff *skb,
3236                               struct netlink_callback *cb)
3237 {
3238         struct mpath_info pinfo;
3239         struct cfg80211_registered_device *dev;
3240         struct net_device *netdev;
3241         u8 dst[ETH_ALEN];
3242         u8 next_hop[ETH_ALEN];
3243         int path_idx = cb->args[1];
3244         int err;
3245
3246         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3247         if (err)
3248                 return err;
3249
3250         if (!dev->ops->dump_mpath) {
3251                 err = -EOPNOTSUPP;
3252                 goto out_err;
3253         }
3254
3255         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3256                 err = -EOPNOTSUPP;
3257                 goto out_err;
3258         }
3259
3260         while (1) {
3261                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3262                                            dst, next_hop, &pinfo);
3263                 if (err == -ENOENT)
3264                         break;
3265                 if (err)
3266                         goto out_err;
3267
3268                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3269                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3270                                        netdev, dst, next_hop,
3271                                        &pinfo) < 0)
3272                         goto out;
3273
3274                 path_idx++;
3275         }
3276
3277
3278  out:
3279         cb->args[1] = path_idx;
3280         err = skb->len;
3281  out_err:
3282         nl80211_finish_netdev_dump(dev);
3283         return err;
3284 }
3285
3286 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3287 {
3288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3289         int err;
3290         struct net_device *dev = info->user_ptr[1];
3291         struct mpath_info pinfo;
3292         struct sk_buff *msg;
3293         u8 *dst = NULL;
3294         u8 next_hop[ETH_ALEN];
3295
3296         memset(&pinfo, 0, sizeof(pinfo));
3297
3298         if (!info->attrs[NL80211_ATTR_MAC])
3299                 return -EINVAL;
3300
3301         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3302
3303         if (!rdev->ops->get_mpath)
3304                 return -EOPNOTSUPP;
3305
3306         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3307                 return -EOPNOTSUPP;
3308
3309         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3310         if (err)
3311                 return err;
3312
3313         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3314         if (!msg)
3315                 return -ENOMEM;
3316
3317         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3318                                  dev, dst, next_hop, &pinfo) < 0) {
3319                 nlmsg_free(msg);
3320                 return -ENOBUFS;
3321         }
3322
3323         return genlmsg_reply(msg, info);
3324 }
3325
3326 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3327 {
3328         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3329         struct net_device *dev = info->user_ptr[1];
3330         u8 *dst = NULL;
3331         u8 *next_hop = NULL;
3332
3333         if (!info->attrs[NL80211_ATTR_MAC])
3334                 return -EINVAL;
3335
3336         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3337                 return -EINVAL;
3338
3339         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3340         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3341
3342         if (!rdev->ops->change_mpath)
3343                 return -EOPNOTSUPP;
3344
3345         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3346                 return -EOPNOTSUPP;
3347
3348         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3349 }
3350
3351 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3352 {
3353         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3354         struct net_device *dev = info->user_ptr[1];
3355         u8 *dst = NULL;
3356         u8 *next_hop = NULL;
3357
3358         if (!info->attrs[NL80211_ATTR_MAC])
3359                 return -EINVAL;
3360
3361         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3362                 return -EINVAL;
3363
3364         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3365         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3366
3367         if (!rdev->ops->add_mpath)
3368                 return -EOPNOTSUPP;
3369
3370         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3371                 return -EOPNOTSUPP;
3372
3373         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3374 }
3375
3376 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3377 {
3378         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3379         struct net_device *dev = info->user_ptr[1];
3380         u8 *dst = NULL;
3381
3382         if (info->attrs[NL80211_ATTR_MAC])
3383                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3384
3385         if (!rdev->ops->del_mpath)
3386                 return -EOPNOTSUPP;
3387
3388         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3389 }
3390
3391 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3392 {
3393         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3394         struct net_device *dev = info->user_ptr[1];
3395         struct bss_parameters params;
3396
3397         memset(&params, 0, sizeof(params));
3398         /* default to not changing parameters */
3399         params.use_cts_prot = -1;
3400         params.use_short_preamble = -1;
3401         params.use_short_slot_time = -1;
3402         params.ap_isolate = -1;
3403         params.ht_opmode = -1;
3404
3405         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3406                 params.use_cts_prot =
3407                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3408         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3409                 params.use_short_preamble =
3410                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3411         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3412                 params.use_short_slot_time =
3413                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3414         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3415                 params.basic_rates =
3416                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3417                 params.basic_rates_len =
3418                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3419         }
3420         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3421                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3422         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3423                 params.ht_opmode =
3424                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3425
3426         if (!rdev->ops->change_bss)
3427                 return -EOPNOTSUPP;
3428
3429         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3430             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3431                 return -EOPNOTSUPP;
3432
3433         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3434 }
3435
3436 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3437         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3438         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3439         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3440         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3441         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3442         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3443 };
3444
3445 static int parse_reg_rule(struct nlattr *tb[],
3446         struct ieee80211_reg_rule *reg_rule)
3447 {
3448         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3449         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3450
3451         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3452                 return -EINVAL;
3453         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3454                 return -EINVAL;
3455         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3456                 return -EINVAL;
3457         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3458                 return -EINVAL;
3459         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3460                 return -EINVAL;
3461
3462         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3463
3464         freq_range->start_freq_khz =
3465                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3466         freq_range->end_freq_khz =
3467                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3468         freq_range->max_bandwidth_khz =
3469                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3470
3471         power_rule->max_eirp =
3472                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3473
3474         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3475                 power_rule->max_antenna_gain =
3476                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3477
3478         return 0;
3479 }
3480
3481 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3482 {
3483         int r;
3484         char *data = NULL;
3485
3486         /*
3487          * You should only get this when cfg80211 hasn't yet initialized
3488          * completely when built-in to the kernel right between the time
3489          * window between nl80211_init() and regulatory_init(), if that is
3490          * even possible.
3491          */
3492         mutex_lock(&cfg80211_mutex);
3493         if (unlikely(!cfg80211_regdomain)) {
3494                 mutex_unlock(&cfg80211_mutex);
3495                 return -EINPROGRESS;
3496         }
3497         mutex_unlock(&cfg80211_mutex);
3498
3499         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3500                 return -EINVAL;
3501
3502         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3503
3504         r = regulatory_hint_user(data);
3505
3506         return r;
3507 }
3508
3509 static int nl80211_get_mesh_config(struct sk_buff *skb,
3510                                    struct genl_info *info)
3511 {
3512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3513         struct net_device *dev = info->user_ptr[1];
3514         struct wireless_dev *wdev = dev->ieee80211_ptr;
3515         struct mesh_config cur_params;
3516         int err = 0;
3517         void *hdr;
3518         struct nlattr *pinfoattr;
3519         struct sk_buff *msg;
3520
3521         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3522                 return -EOPNOTSUPP;
3523
3524         if (!rdev->ops->get_mesh_config)
3525                 return -EOPNOTSUPP;
3526
3527         wdev_lock(wdev);
3528         /* If not connected, get default parameters */
3529         if (!wdev->mesh_id_len)
3530                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3531         else
3532                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3533                                                  &cur_params);
3534         wdev_unlock(wdev);
3535
3536         if (err)
3537                 return err;
3538
3539         /* Draw up a netlink message to send back */
3540         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3541         if (!msg)
3542                 return -ENOMEM;
3543         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3544                              NL80211_CMD_GET_MESH_CONFIG);
3545         if (!hdr)
3546                 goto out;
3547         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3548         if (!pinfoattr)
3549                 goto nla_put_failure;
3550         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3551             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3552                         cur_params.dot11MeshRetryTimeout) ||
3553             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3554                         cur_params.dot11MeshConfirmTimeout) ||
3555             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3556                         cur_params.dot11MeshHoldingTimeout) ||
3557             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3558                         cur_params.dot11MeshMaxPeerLinks) ||
3559             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3560                        cur_params.dot11MeshMaxRetries) ||
3561             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3562                        cur_params.dot11MeshTTL) ||
3563             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3564                        cur_params.element_ttl) ||
3565             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3566                        cur_params.auto_open_plinks) ||
3567             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3568                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3569             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3570                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3571             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3572                         cur_params.path_refresh_time) ||
3573             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3574                         cur_params.min_discovery_timeout) ||
3575             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3576                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3577             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3578                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3579             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3580                         cur_params.dot11MeshHWMPperrMinInterval) ||
3581             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3582                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3583             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3584                        cur_params.dot11MeshHWMPRootMode) ||
3585             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3586                         cur_params.dot11MeshHWMPRannInterval) ||
3587             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3588                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3589             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3590                        cur_params.dot11MeshForwarding) ||
3591             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3592                         cur_params.rssi_threshold) ||
3593             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3594                         cur_params.ht_opmode) ||
3595             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3596                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3597             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3598                         cur_params.dot11MeshHWMProotInterval) ||
3599             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3600                         cur_params.dot11MeshHWMPconfirmationInterval))
3601                 goto nla_put_failure;
3602         nla_nest_end(msg, pinfoattr);
3603         genlmsg_end(msg, hdr);
3604         return genlmsg_reply(msg, info);
3605
3606  nla_put_failure:
3607         genlmsg_cancel(msg, hdr);
3608  out:
3609         nlmsg_free(msg);
3610         return -ENOBUFS;
3611 }
3612
3613 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3614         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3615         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3616         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3617         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3618         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3619         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3620         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3621         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3622         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3623         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3624         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3625         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3626         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3627         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3628         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3629         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3630         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3631         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3632         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3633         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3634         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3635         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3636         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3637         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3638         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3639 };
3640
3641 static const struct nla_policy
3642         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3643         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3644         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3645         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3646         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3647         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3648                                     .len = IEEE80211_MAX_DATA_LEN },
3649         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3650 };
3651
3652 static int nl80211_parse_mesh_config(struct genl_info *info,
3653                                      struct mesh_config *cfg,
3654                                      u32 *mask_out)
3655 {
3656         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3657         u32 mask = 0;
3658
3659 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3660 do {\
3661         if (table[attr_num]) {\
3662                 cfg->param = nla_fn(table[attr_num]); \
3663                 mask |= (1 << (attr_num - 1)); \
3664         } \
3665 } while (0);\
3666
3667
3668         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3669                 return -EINVAL;
3670         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3671                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3672                              nl80211_meshconf_params_policy))
3673                 return -EINVAL;
3674
3675         /* This makes sure that there aren't more than 32 mesh config
3676          * parameters (otherwise our bitfield scheme would not work.) */
3677         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3678
3679         /* Fill in the params struct */
3680         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3681                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3682                                   nla_get_u16);
3683         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3684                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3685                                   nla_get_u16);
3686         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3687                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3688                                   nla_get_u16);
3689         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3690                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3691                                   nla_get_u16);
3692         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3693                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3694                                   nla_get_u8);
3695         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3696                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3697         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3698                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3699                                   nla_get_u8);
3700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3701                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3702                                   nla_get_u8);
3703         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3704                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3705                                   nla_get_u32);
3706         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3707                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3708                                   nla_get_u8);
3709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3710                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3711                                   nla_get_u32);
3712         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3713                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3714                                   nla_get_u16);
3715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3716                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3717                                   nla_get_u32);
3718         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3719                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3720                                   nla_get_u16);
3721         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3722                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3723                                   nla_get_u16);
3724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3725                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3726                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3727                                   nla_get_u16);
3728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3729                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3730         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3731                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3732                                   nla_get_u16);
3733         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3734                                   dot11MeshGateAnnouncementProtocol, mask,
3735                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3736                                   nla_get_u8);
3737         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3738                                   mask, NL80211_MESHCONF_FORWARDING,
3739                                   nla_get_u8);
3740         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3741                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3742                                   nla_get_u32);
3743         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3744                                   mask, NL80211_MESHCONF_HT_OPMODE,
3745                                   nla_get_u16);
3746         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3747                                   mask,
3748                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3749                                   nla_get_u32);
3750         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3751                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3752                                   nla_get_u16);
3753         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3754                                   dot11MeshHWMPconfirmationInterval, mask,
3755                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3756                                   nla_get_u16);
3757         if (mask_out)
3758                 *mask_out = mask;
3759
3760         return 0;
3761
3762 #undef FILL_IN_MESH_PARAM_IF_SET
3763 }
3764
3765 static int nl80211_parse_mesh_setup(struct genl_info *info,
3766                                      struct mesh_setup *setup)
3767 {
3768         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3769
3770         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3771                 return -EINVAL;
3772         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3773                              info->attrs[NL80211_ATTR_MESH_SETUP],
3774                              nl80211_mesh_setup_params_policy))
3775                 return -EINVAL;
3776
3777         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3778                 setup->sync_method =
3779                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3780                  IEEE80211_SYNC_METHOD_VENDOR :
3781                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3782
3783         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3784                 setup->path_sel_proto =
3785                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3786                  IEEE80211_PATH_PROTOCOL_VENDOR :
3787                  IEEE80211_PATH_PROTOCOL_HWMP;
3788
3789         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3790                 setup->path_metric =
3791                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3792                  IEEE80211_PATH_METRIC_VENDOR :
3793                  IEEE80211_PATH_METRIC_AIRTIME;
3794
3795
3796         if (tb[NL80211_MESH_SETUP_IE]) {
3797                 struct nlattr *ieattr =
3798                         tb[NL80211_MESH_SETUP_IE];
3799                 if (!is_valid_ie_attr(ieattr))
3800                         return -EINVAL;
3801                 setup->ie = nla_data(ieattr);
3802                 setup->ie_len = nla_len(ieattr);
3803         }
3804         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3805         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3806
3807         return 0;
3808 }
3809
3810 static int nl80211_update_mesh_config(struct sk_buff *skb,
3811                                       struct genl_info *info)
3812 {
3813         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3814         struct net_device *dev = info->user_ptr[1];
3815         struct wireless_dev *wdev = dev->ieee80211_ptr;
3816         struct mesh_config cfg;
3817         u32 mask;
3818         int err;
3819
3820         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3821                 return -EOPNOTSUPP;
3822
3823         if (!rdev->ops->update_mesh_config)
3824                 return -EOPNOTSUPP;
3825
3826         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3827         if (err)
3828                 return err;
3829
3830         wdev_lock(wdev);
3831         if (!wdev->mesh_id_len)
3832                 err = -ENOLINK;
3833
3834         if (!err)
3835                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3836                                                     mask, &cfg);
3837
3838         wdev_unlock(wdev);
3839
3840         return err;
3841 }
3842
3843 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3844 {
3845         struct sk_buff *msg;
3846         void *hdr = NULL;
3847         struct nlattr *nl_reg_rules;
3848         unsigned int i;
3849         int err = -EINVAL;
3850
3851         mutex_lock(&cfg80211_mutex);
3852
3853         if (!cfg80211_regdomain)
3854                 goto out;
3855
3856         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3857         if (!msg) {
3858                 err = -ENOBUFS;
3859                 goto out;
3860         }
3861
3862         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3863                              NL80211_CMD_GET_REG);
3864         if (!hdr)
3865                 goto put_failure;
3866
3867         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3868                            cfg80211_regdomain->alpha2) ||
3869             (cfg80211_regdomain->dfs_region &&
3870              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3871                         cfg80211_regdomain->dfs_region)))
3872                 goto nla_put_failure;
3873
3874         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3875         if (!nl_reg_rules)
3876                 goto nla_put_failure;
3877
3878         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3879                 struct nlattr *nl_reg_rule;
3880                 const struct ieee80211_reg_rule *reg_rule;
3881                 const struct ieee80211_freq_range *freq_range;
3882                 const struct ieee80211_power_rule *power_rule;
3883
3884                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3885                 freq_range = &reg_rule->freq_range;
3886                 power_rule = &reg_rule->power_rule;
3887
3888                 nl_reg_rule = nla_nest_start(msg, i);
3889                 if (!nl_reg_rule)
3890                         goto nla_put_failure;
3891
3892                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3893                                 reg_rule->flags) ||
3894                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3895                                 freq_range->start_freq_khz) ||
3896                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3897                                 freq_range->end_freq_khz) ||
3898                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3899                                 freq_range->max_bandwidth_khz) ||
3900                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3901                                 power_rule->max_antenna_gain) ||
3902                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3903                                 power_rule->max_eirp))
3904                         goto nla_put_failure;
3905
3906                 nla_nest_end(msg, nl_reg_rule);
3907         }
3908
3909         nla_nest_end(msg, nl_reg_rules);
3910
3911         genlmsg_end(msg, hdr);
3912         err = genlmsg_reply(msg, info);
3913         goto out;
3914
3915 nla_put_failure:
3916         genlmsg_cancel(msg, hdr);
3917 put_failure:
3918         nlmsg_free(msg);
3919         err = -EMSGSIZE;
3920 out:
3921         mutex_unlock(&cfg80211_mutex);
3922         return err;
3923 }
3924
3925 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3926 {
3927         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3928         struct nlattr *nl_reg_rule;
3929         char *alpha2 = NULL;
3930         int rem_reg_rules = 0, r = 0;
3931         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3932         u8 dfs_region = 0;
3933         struct ieee80211_regdomain *rd = NULL;
3934
3935         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3936                 return -EINVAL;
3937
3938         if (!info->attrs[NL80211_ATTR_REG_RULES])
3939                 return -EINVAL;
3940
3941         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3942
3943         if (info->attrs[NL80211_ATTR_DFS_REGION])
3944                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3945
3946         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3947                         rem_reg_rules) {
3948                 num_rules++;
3949                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3950                         return -EINVAL;
3951         }
3952
3953         mutex_lock(&cfg80211_mutex);
3954
3955         if (!reg_is_valid_request(alpha2)) {
3956                 r = -EINVAL;
3957                 goto bad_reg;
3958         }
3959
3960         size_of_regd = sizeof(struct ieee80211_regdomain) +
3961                 (num_rules * sizeof(struct ieee80211_reg_rule));
3962
3963         rd = kzalloc(size_of_regd, GFP_KERNEL);
3964         if (!rd) {
3965                 r = -ENOMEM;
3966                 goto bad_reg;
3967         }
3968
3969         rd->n_reg_rules = num_rules;
3970         rd->alpha2[0] = alpha2[0];
3971         rd->alpha2[1] = alpha2[1];
3972
3973         /*
3974          * Disable DFS master mode if the DFS region was
3975          * not supported or known on this kernel.
3976          */
3977         if (reg_supported_dfs_region(dfs_region))
3978                 rd->dfs_region = dfs_region;
3979
3980         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3981                         rem_reg_rules) {
3982                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3983                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3984                         reg_rule_policy);
3985                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3986                 if (r)
3987                         goto bad_reg;
3988
3989                 rule_idx++;
3990
3991                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3992                         r = -EINVAL;
3993                         goto bad_reg;
3994                 }
3995         }
3996
3997         BUG_ON(rule_idx != num_rules);
3998
3999         r = set_regdom(rd);
4000
4001         mutex_unlock(&cfg80211_mutex);
4002
4003         return r;
4004
4005  bad_reg:
4006         mutex_unlock(&cfg80211_mutex);
4007         kfree(rd);
4008         return r;
4009 }
4010
4011 static int validate_scan_freqs(struct nlattr *freqs)
4012 {
4013         struct nlattr *attr1, *attr2;
4014         int n_channels = 0, tmp1, tmp2;
4015
4016         nla_for_each_nested(attr1, freqs, tmp1) {
4017                 n_channels++;
4018                 /*
4019                  * Some hardware has a limited channel list for
4020                  * scanning, and it is pretty much nonsensical
4021                  * to scan for a channel twice, so disallow that
4022                  * and don't require drivers to check that the
4023                  * channel list they get isn't longer than what
4024                  * they can scan, as long as they can scan all
4025                  * the channels they registered at once.
4026                  */
4027                 nla_for_each_nested(attr2, freqs, tmp2)
4028                         if (attr1 != attr2 &&
4029                             nla_get_u32(attr1) == nla_get_u32(attr2))
4030                                 return 0;
4031         }
4032
4033         return n_channels;
4034 }
4035
4036 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4037 {
4038         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4039         struct net_device *dev = info->user_ptr[1];
4040         struct cfg80211_scan_request *request;
4041         struct nlattr *attr;
4042         struct wiphy *wiphy;
4043         int err, tmp, n_ssids = 0, n_channels, i;
4044         size_t ie_len;
4045
4046         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4047                 return -EINVAL;
4048
4049         wiphy = &rdev->wiphy;
4050
4051         if (!rdev->ops->scan)
4052                 return -EOPNOTSUPP;
4053
4054         if (rdev->scan_req)
4055                 return -EBUSY;
4056
4057         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4058                 n_channels = validate_scan_freqs(
4059                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4060                 if (!n_channels)
4061                         return -EINVAL;
4062         } else {
4063                 enum ieee80211_band band;
4064                 n_channels = 0;
4065
4066                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4067                         if (wiphy->bands[band])
4068                                 n_channels += wiphy->bands[band]->n_channels;
4069         }
4070
4071         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4072                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4073                         n_ssids++;
4074
4075         if (n_ssids > wiphy->max_scan_ssids)
4076                 return -EINVAL;
4077
4078         if (info->attrs[NL80211_ATTR_IE])
4079                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4080         else
4081                 ie_len = 0;
4082
4083         if (ie_len > wiphy->max_scan_ie_len)
4084                 return -EINVAL;
4085
4086         request = kzalloc(sizeof(*request)
4087                         + sizeof(*request->ssids) * n_ssids
4088                         + sizeof(*request->channels) * n_channels
4089                         + ie_len, GFP_KERNEL);
4090         if (!request)
4091                 return -ENOMEM;
4092
4093         if (n_ssids)
4094                 request->ssids = (void *)&request->channels[n_channels];
4095         request->n_ssids = n_ssids;
4096         if (ie_len) {
4097                 if (request->ssids)
4098                         request->ie = (void *)(request->ssids + n_ssids);
4099                 else
4100                         request->ie = (void *)(request->channels + n_channels);
4101         }
4102
4103         i = 0;
4104         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4105                 /* user specified, bail out if channel not found */
4106                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4107                         struct ieee80211_channel *chan;
4108
4109                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4110
4111                         if (!chan) {
4112                                 err = -EINVAL;
4113                                 goto out_free;
4114                         }
4115
4116                         /* ignore disabled channels */
4117                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4118                                 continue;
4119
4120                         request->channels[i] = chan;
4121                         i++;
4122                 }
4123         } else {
4124                 enum ieee80211_band band;
4125
4126                 /* all channels */
4127                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4128                         int j;
4129                         if (!wiphy->bands[band])
4130                                 continue;
4131                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4132                                 struct ieee80211_channel *chan;
4133
4134                                 chan = &wiphy->bands[band]->channels[j];
4135
4136                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4137                                         continue;
4138
4139                                 request->channels[i] = chan;
4140                                 i++;
4141                         }
4142                 }
4143         }
4144
4145         if (!i) {
4146                 err = -EINVAL;
4147                 goto out_free;
4148         }
4149
4150         request->n_channels = i;
4151
4152         i = 0;
4153         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4154                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4155                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4156                                 err = -EINVAL;
4157                                 goto out_free;
4158                         }
4159                         request->ssids[i].ssid_len = nla_len(attr);
4160                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4161                         i++;
4162                 }
4163         }
4164
4165         if (info->attrs[NL80211_ATTR_IE]) {
4166                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4167                 memcpy((void *)request->ie,
4168                        nla_data(info->attrs[NL80211_ATTR_IE]),
4169                        request->ie_len);
4170         }
4171
4172         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4173                 if (wiphy->bands[i])
4174                         request->rates[i] =
4175                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4176
4177         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4178                 nla_for_each_nested(attr,
4179                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4180                                     tmp) {
4181                         enum ieee80211_band band = nla_type(attr);
4182
4183                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4184                                 err = -EINVAL;
4185                                 goto out_free;
4186                         }
4187                         err = ieee80211_get_ratemask(wiphy->bands[band],
4188                                                      nla_data(attr),
4189                                                      nla_len(attr),
4190                                                      &request->rates[band]);
4191                         if (err)
4192                                 goto out_free;
4193                 }
4194         }
4195
4196         request->no_cck =
4197                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4198
4199         request->dev = dev;
4200         request->wiphy = &rdev->wiphy;
4201
4202         rdev->scan_req = request;
4203         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4204
4205         if (!err) {
4206                 nl80211_send_scan_start(rdev, dev);
4207                 dev_hold(dev);
4208         } else {
4209  out_free:
4210                 rdev->scan_req = NULL;
4211                 kfree(request);
4212         }
4213
4214         return err;
4215 }
4216
4217 static int nl80211_start_sched_scan(struct sk_buff *skb,
4218                                     struct genl_info *info)
4219 {
4220         struct cfg80211_sched_scan_request *request;
4221         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4222         struct net_device *dev = info->user_ptr[1];
4223         struct nlattr *attr;
4224         struct wiphy *wiphy;
4225         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4226         u32 interval;
4227         enum ieee80211_band band;
4228         size_t ie_len;
4229         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4230
4231         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4232             !rdev->ops->sched_scan_start)
4233                 return -EOPNOTSUPP;
4234
4235         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4236                 return -EINVAL;
4237
4238         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4239                 return -EINVAL;
4240
4241         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4242         if (interval == 0)
4243                 return -EINVAL;
4244
4245         wiphy = &rdev->wiphy;
4246
4247         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4248                 n_channels = validate_scan_freqs(
4249                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4250                 if (!n_channels)
4251                         return -EINVAL;
4252         } else {
4253                 n_channels = 0;
4254
4255                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4256                         if (wiphy->bands[band])
4257                                 n_channels += wiphy->bands[band]->n_channels;
4258         }
4259
4260         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4261                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4262                                     tmp)
4263                         n_ssids++;
4264
4265         if (n_ssids > wiphy->max_sched_scan_ssids)
4266                 return -EINVAL;
4267
4268         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4269                 nla_for_each_nested(attr,
4270                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4271                                     tmp)
4272                         n_match_sets++;
4273
4274         if (n_match_sets > wiphy->max_match_sets)
4275                 return -EINVAL;
4276
4277         if (info->attrs[NL80211_ATTR_IE])
4278                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4279         else
4280                 ie_len = 0;
4281
4282         if (ie_len > wiphy->max_sched_scan_ie_len)
4283                 return -EINVAL;
4284
4285         mutex_lock(&rdev->sched_scan_mtx);
4286
4287         if (rdev->sched_scan_req) {
4288                 err = -EINPROGRESS;
4289                 goto out;
4290         }
4291
4292         request = kzalloc(sizeof(*request)
4293                         + sizeof(*request->ssids) * n_ssids
4294                         + sizeof(*request->match_sets) * n_match_sets
4295                         + sizeof(*request->channels) * n_channels
4296                         + ie_len, GFP_KERNEL);
4297         if (!request) {
4298                 err = -ENOMEM;
4299                 goto out;
4300         }
4301
4302         if (n_ssids)
4303                 request->ssids = (void *)&request->channels[n_channels];
4304         request->n_ssids = n_ssids;
4305         if (ie_len) {
4306                 if (request->ssids)
4307                         request->ie = (void *)(request->ssids + n_ssids);
4308                 else
4309                         request->ie = (void *)(request->channels + n_channels);
4310         }
4311
4312         if (n_match_sets) {
4313                 if (request->ie)
4314                         request->match_sets = (void *)(request->ie + ie_len);
4315                 else if (request->ssids)
4316                         request->match_sets =
4317                                 (void *)(request->ssids + n_ssids);
4318                 else
4319                         request->match_sets =
4320                                 (void *)(request->channels + n_channels);
4321         }
4322         request->n_match_sets = n_match_sets;
4323
4324         i = 0;
4325         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4326                 /* user specified, bail out if channel not found */
4327                 nla_for_each_nested(attr,
4328                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4329                                     tmp) {
4330                         struct ieee80211_channel *chan;
4331
4332                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4333
4334                         if (!chan) {
4335                                 err = -EINVAL;
4336                                 goto out_free;
4337                         }
4338
4339                         /* ignore disabled channels */
4340                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4341                                 continue;
4342
4343                         request->channels[i] = chan;
4344                         i++;
4345                 }
4346         } else {
4347                 /* all channels */
4348                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4349                         int j;
4350                         if (!wiphy->bands[band])
4351                                 continue;
4352                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4353                                 struct ieee80211_channel *chan;
4354
4355                                 chan = &wiphy->bands[band]->channels[j];
4356
4357                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4358                                         continue;
4359
4360                                 request->channels[i] = chan;
4361                                 i++;
4362                         }
4363                 }
4364         }
4365
4366         if (!i) {
4367                 err = -EINVAL;
4368                 goto out_free;
4369         }
4370
4371         request->n_channels = i;
4372
4373         i = 0;
4374         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4375                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4376                                     tmp) {
4377                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4378                                 err = -EINVAL;
4379                                 goto out_free;
4380                         }
4381                         request->ssids[i].ssid_len = nla_len(attr);
4382                         memcpy(request->ssids[i].ssid, nla_data(attr),
4383                                nla_len(attr));
4384                         i++;
4385                 }
4386         }
4387
4388         i = 0;
4389         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4390                 nla_for_each_nested(attr,
4391                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4392                                     tmp) {
4393                         struct nlattr *ssid, *rssi;
4394
4395                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4396                                   nla_data(attr), nla_len(attr),
4397                                   nl80211_match_policy);
4398                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4399                         if (ssid) {
4400                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4401                                         err = -EINVAL;
4402                                         goto out_free;
4403                                 }
4404                                 memcpy(request->match_sets[i].ssid.ssid,
4405                                        nla_data(ssid), nla_len(ssid));
4406                                 request->match_sets[i].ssid.ssid_len =
4407                                         nla_len(ssid);
4408                         }
4409                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4410                         if (rssi)
4411                                 request->rssi_thold = nla_get_u32(rssi);
4412                         else
4413                                 request->rssi_thold =
4414                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4415                         i++;
4416                 }
4417         }
4418
4419         if (info->attrs[NL80211_ATTR_IE]) {
4420                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4421                 memcpy((void *)request->ie,
4422                        nla_data(info->attrs[NL80211_ATTR_IE]),
4423                        request->ie_len);
4424         }
4425
4426         request->dev = dev;
4427         request->wiphy = &rdev->wiphy;
4428         request->interval = interval;
4429
4430         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4431         if (!err) {
4432                 rdev->sched_scan_req = request;
4433                 nl80211_send_sched_scan(rdev, dev,
4434                                         NL80211_CMD_START_SCHED_SCAN);
4435                 goto out;
4436         }
4437
4438 out_free:
4439         kfree(request);
4440 out:
4441         mutex_unlock(&rdev->sched_scan_mtx);
4442         return err;
4443 }
4444
4445 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4446                                    struct genl_info *info)
4447 {
4448         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4449         int err;
4450
4451         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4452             !rdev->ops->sched_scan_stop)
4453                 return -EOPNOTSUPP;
4454
4455         mutex_lock(&rdev->sched_scan_mtx);
4456         err = __cfg80211_stop_sched_scan(rdev, false);
4457         mutex_unlock(&rdev->sched_scan_mtx);
4458
4459         return err;
4460 }
4461
4462 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4463                             u32 seq, int flags,
4464                             struct cfg80211_registered_device *rdev,
4465                             struct wireless_dev *wdev,
4466                             struct cfg80211_internal_bss *intbss)
4467 {
4468         struct cfg80211_bss *res = &intbss->pub;
4469         void *hdr;
4470         struct nlattr *bss;
4471
4472         ASSERT_WDEV_LOCK(wdev);
4473
4474         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4475                              NL80211_CMD_NEW_SCAN_RESULTS);
4476         if (!hdr)
4477                 return -1;
4478
4479         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4480
4481         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4482             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4483                 goto nla_put_failure;
4484
4485         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4486         if (!bss)
4487                 goto nla_put_failure;
4488         if ((!is_zero_ether_addr(res->bssid) &&
4489              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4490             (res->information_elements && res->len_information_elements &&
4491              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4492                      res->len_information_elements,
4493                      res->information_elements)) ||
4494             (res->beacon_ies && res->len_beacon_ies &&
4495              res->beacon_ies != res->information_elements &&
4496              nla_put(msg, NL80211_BSS_BEACON_IES,
4497                      res->len_beacon_ies, res->beacon_ies)))
4498                 goto nla_put_failure;
4499         if (res->tsf &&
4500             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4501                 goto nla_put_failure;
4502         if (res->beacon_interval &&
4503             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4504                 goto nla_put_failure;
4505         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4506             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4507             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4508                         jiffies_to_msecs(jiffies - intbss->ts)))
4509                 goto nla_put_failure;
4510
4511         switch (rdev->wiphy.signal_type) {
4512         case CFG80211_SIGNAL_TYPE_MBM:
4513                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4514                         goto nla_put_failure;
4515                 break;
4516         case CFG80211_SIGNAL_TYPE_UNSPEC:
4517                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4518                         goto nla_put_failure;
4519                 break;
4520         default:
4521                 break;
4522         }
4523
4524         switch (wdev->iftype) {
4525         case NL80211_IFTYPE_P2P_CLIENT:
4526         case NL80211_IFTYPE_STATION:
4527                 if (intbss == wdev->current_bss &&
4528                     nla_put_u32(msg, NL80211_BSS_STATUS,
4529                                 NL80211_BSS_STATUS_ASSOCIATED))
4530                         goto nla_put_failure;
4531                 break;
4532         case NL80211_IFTYPE_ADHOC:
4533                 if (intbss == wdev->current_bss &&
4534                     nla_put_u32(msg, NL80211_BSS_STATUS,
4535                                 NL80211_BSS_STATUS_IBSS_JOINED))
4536                         goto nla_put_failure;
4537                 break;
4538         default:
4539                 break;
4540         }
4541
4542         nla_nest_end(msg, bss);
4543
4544         return genlmsg_end(msg, hdr);
4545
4546  nla_put_failure:
4547         genlmsg_cancel(msg, hdr);
4548         return -EMSGSIZE;
4549 }
4550
4551 static int nl80211_dump_scan(struct sk_buff *skb,
4552                              struct netlink_callback *cb)
4553 {
4554         struct cfg80211_registered_device *rdev;
4555         struct net_device *dev;
4556         struct cfg80211_internal_bss *scan;
4557         struct wireless_dev *wdev;
4558         int start = cb->args[1], idx = 0;
4559         int err;
4560
4561         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4562         if (err)
4563                 return err;
4564
4565         wdev = dev->ieee80211_ptr;
4566
4567         wdev_lock(wdev);
4568         spin_lock_bh(&rdev->bss_lock);
4569         cfg80211_bss_expire(rdev);
4570
4571         cb->seq = rdev->bss_generation;
4572
4573         list_for_each_entry(scan, &rdev->bss_list, list) {
4574                 if (++idx <= start)
4575                         continue;
4576                 if (nl80211_send_bss(skb, cb,
4577                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4578                                 rdev, wdev, scan) < 0) {
4579                         idx--;
4580                         break;
4581                 }
4582         }
4583
4584         spin_unlock_bh(&rdev->bss_lock);
4585         wdev_unlock(wdev);
4586
4587         cb->args[1] = idx;
4588         nl80211_finish_netdev_dump(rdev);
4589
4590         return skb->len;
4591 }
4592
4593 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4594                                 int flags, struct net_device *dev,
4595                                 struct survey_info *survey)
4596 {
4597         void *hdr;
4598         struct nlattr *infoattr;
4599
4600         hdr = nl80211hdr_put(msg, pid, seq, flags,
4601                              NL80211_CMD_NEW_SURVEY_RESULTS);
4602         if (!hdr)
4603                 return -ENOMEM;
4604
4605         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4606                 goto nla_put_failure;
4607
4608         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4609         if (!infoattr)
4610                 goto nla_put_failure;
4611
4612         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4613                         survey->channel->center_freq))
4614                 goto nla_put_failure;
4615
4616         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4617             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4618                 goto nla_put_failure;
4619         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4620             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4621                 goto nla_put_failure;
4622         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4623             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4624                         survey->channel_time))
4625                 goto nla_put_failure;
4626         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4627             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4628                         survey->channel_time_busy))
4629                 goto nla_put_failure;
4630         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4631             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4632                         survey->channel_time_ext_busy))
4633                 goto nla_put_failure;
4634         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4635             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4636                         survey->channel_time_rx))
4637                 goto nla_put_failure;
4638         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4639             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4640                         survey->channel_time_tx))
4641                 goto nla_put_failure;
4642
4643         nla_nest_end(msg, infoattr);
4644
4645         return genlmsg_end(msg, hdr);
4646
4647  nla_put_failure:
4648         genlmsg_cancel(msg, hdr);
4649         return -EMSGSIZE;
4650 }
4651
4652 static int nl80211_dump_survey(struct sk_buff *skb,
4653                         struct netlink_callback *cb)
4654 {
4655         struct survey_info survey;
4656         struct cfg80211_registered_device *dev;
4657         struct net_device *netdev;
4658         int survey_idx = cb->args[1];
4659         int res;
4660
4661         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4662         if (res)
4663                 return res;
4664
4665         if (!dev->ops->dump_survey) {
4666                 res = -EOPNOTSUPP;
4667                 goto out_err;
4668         }
4669
4670         while (1) {
4671                 struct ieee80211_channel *chan;
4672
4673                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4674                                             &survey);
4675                 if (res == -ENOENT)
4676                         break;
4677                 if (res)
4678                         goto out_err;
4679
4680                 /* Survey without a channel doesn't make sense */
4681                 if (!survey.channel) {
4682                         res = -EINVAL;
4683                         goto out;
4684                 }
4685
4686                 chan = ieee80211_get_channel(&dev->wiphy,
4687                                              survey.channel->center_freq);
4688                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4689                         survey_idx++;
4690                         continue;
4691                 }
4692
4693                 if (nl80211_send_survey(skb,
4694                                 NETLINK_CB(cb->skb).pid,
4695                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4696                                 netdev,
4697                                 &survey) < 0)
4698                         goto out;
4699                 survey_idx++;
4700         }
4701
4702  out:
4703         cb->args[1] = survey_idx;
4704         res = skb->len;
4705  out_err:
4706         nl80211_finish_netdev_dump(dev);
4707         return res;
4708 }
4709
4710 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4711 {
4712         return auth_type <= NL80211_AUTHTYPE_MAX;
4713 }
4714
4715 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4716 {
4717         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4718                                   NL80211_WPA_VERSION_2));
4719 }
4720
4721 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4722 {
4723         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4724         struct net_device *dev = info->user_ptr[1];
4725         struct ieee80211_channel *chan;
4726         const u8 *bssid, *ssid, *ie = NULL;
4727         int err, ssid_len, ie_len = 0;
4728         enum nl80211_auth_type auth_type;
4729         struct key_parse key;
4730         bool local_state_change;
4731
4732         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4733                 return -EINVAL;
4734
4735         if (!info->attrs[NL80211_ATTR_MAC])
4736                 return -EINVAL;
4737
4738         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4739                 return -EINVAL;
4740
4741         if (!info->attrs[NL80211_ATTR_SSID])
4742                 return -EINVAL;
4743
4744         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4745                 return -EINVAL;
4746
4747         err = nl80211_parse_key(info, &key);
4748         if (err)
4749                 return err;
4750
4751         if (key.idx >= 0) {
4752                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4753                         return -EINVAL;
4754                 if (!key.p.key || !key.p.key_len)
4755                         return -EINVAL;
4756                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4757                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4758                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4759                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4760                         return -EINVAL;
4761                 if (key.idx > 4)
4762                         return -EINVAL;
4763         } else {
4764                 key.p.key_len = 0;
4765                 key.p.key = NULL;
4766         }
4767
4768         if (key.idx >= 0) {
4769                 int i;
4770                 bool ok = false;
4771                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4772                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4773                                 ok = true;
4774                                 break;
4775                         }
4776                 }
4777                 if (!ok)
4778                         return -EINVAL;
4779         }
4780
4781         if (!rdev->ops->auth)
4782                 return -EOPNOTSUPP;
4783
4784         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4785             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4786                 return -EOPNOTSUPP;
4787
4788         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4789         chan = ieee80211_get_channel(&rdev->wiphy,
4790                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4791         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4792                 return -EINVAL;
4793
4794         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4795         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4796
4797         if (info->attrs[NL80211_ATTR_IE]) {
4798                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4799                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4800         }
4801
4802         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4803         if (!nl80211_valid_auth_type(auth_type))
4804                 return -EINVAL;
4805
4806         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4807
4808         /*
4809          * Since we no longer track auth state, ignore
4810          * requests to only change local state.
4811          */
4812         if (local_state_change)
4813                 return 0;
4814
4815         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4816                                   ssid, ssid_len, ie, ie_len,
4817                                   key.p.key, key.p.key_len, key.idx);
4818 }
4819
4820 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4821                                    struct genl_info *info,
4822                                    struct cfg80211_crypto_settings *settings,
4823                                    int cipher_limit)
4824 {
4825         memset(settings, 0, sizeof(*settings));
4826
4827         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4828
4829         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4830                 u16 proto;
4831                 proto = nla_get_u16(
4832                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4833                 settings->control_port_ethertype = cpu_to_be16(proto);
4834                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4835                     proto != ETH_P_PAE)
4836                         return -EINVAL;
4837                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4838                         settings->control_port_no_encrypt = true;
4839         } else
4840                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4841
4842         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4843                 void *data;
4844                 int len, i;
4845
4846                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4847                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4848                 settings->n_ciphers_pairwise = len / sizeof(u32);
4849
4850                 if (len % sizeof(u32))
4851                         return -EINVAL;
4852
4853                 if (settings->n_ciphers_pairwise > cipher_limit)
4854                         return -EINVAL;
4855
4856                 memcpy(settings->ciphers_pairwise, data, len);
4857
4858                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4859                         if (!cfg80211_supported_cipher_suite(
4860                                         &rdev->wiphy,
4861                                         settings->ciphers_pairwise[i]))
4862                                 return -EINVAL;
4863         }
4864
4865         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4866                 settings->cipher_group =
4867                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4868                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4869                                                      settings->cipher_group))
4870                         return -EINVAL;
4871         }
4872
4873         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4874                 settings->wpa_versions =
4875                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4876                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4877                         return -EINVAL;
4878         }
4879
4880         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4881                 void *data;
4882                 int len;
4883
4884                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4885                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4886                 settings->n_akm_suites = len / sizeof(u32);
4887
4888                 if (len % sizeof(u32))
4889                         return -EINVAL;
4890
4891                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4892                         return -EINVAL;
4893
4894                 memcpy(settings->akm_suites, data, len);
4895         }
4896
4897         return 0;
4898 }
4899
4900 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4901 {
4902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4903         struct net_device *dev = info->user_ptr[1];
4904         struct cfg80211_crypto_settings crypto;
4905         struct ieee80211_channel *chan;
4906         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4907         int err, ssid_len, ie_len = 0;
4908         bool use_mfp = false;
4909         u32 flags = 0;
4910         struct ieee80211_ht_cap *ht_capa = NULL;
4911         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4912
4913         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4914                 return -EINVAL;
4915
4916         if (!info->attrs[NL80211_ATTR_MAC] ||
4917             !info->attrs[NL80211_ATTR_SSID] ||
4918             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4919                 return -EINVAL;
4920
4921         if (!rdev->ops->assoc)
4922                 return -EOPNOTSUPP;
4923
4924         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4925             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4926                 return -EOPNOTSUPP;
4927
4928         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4929
4930         chan = ieee80211_get_channel(&rdev->wiphy,
4931                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4932         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4933                 return -EINVAL;
4934
4935         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4936         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4937
4938         if (info->attrs[NL80211_ATTR_IE]) {
4939                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4940                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4941         }
4942
4943         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4944                 enum nl80211_mfp mfp =
4945                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4946                 if (mfp == NL80211_MFP_REQUIRED)
4947                         use_mfp = true;
4948                 else if (mfp != NL80211_MFP_NO)
4949                         return -EINVAL;
4950         }
4951
4952         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4953                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4954
4955         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4956                 flags |= ASSOC_REQ_DISABLE_HT;
4957
4958         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4959                 ht_capa_mask =
4960                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4961
4962         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4963                 if (!ht_capa_mask)
4964                         return -EINVAL;
4965                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4966         }
4967
4968         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4969         if (!err)
4970                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4971                                           ssid, ssid_len, ie, ie_len, use_mfp,
4972                                           &crypto, flags, ht_capa,
4973                                           ht_capa_mask);
4974
4975         return err;
4976 }
4977
4978 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4979 {
4980         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4981         struct net_device *dev = info->user_ptr[1];
4982         const u8 *ie = NULL, *bssid;
4983         int ie_len = 0;
4984         u16 reason_code;
4985         bool local_state_change;
4986
4987         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4988                 return -EINVAL;
4989
4990         if (!info->attrs[NL80211_ATTR_MAC])
4991                 return -EINVAL;
4992
4993         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4994                 return -EINVAL;
4995
4996         if (!rdev->ops->deauth)
4997                 return -EOPNOTSUPP;
4998
4999         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5000             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5001                 return -EOPNOTSUPP;
5002
5003         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5004
5005         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5006         if (reason_code == 0) {
5007                 /* Reason Code 0 is reserved */
5008                 return -EINVAL;
5009         }
5010
5011         if (info->attrs[NL80211_ATTR_IE]) {
5012                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5013                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5014         }
5015
5016         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5017
5018         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5019                                     local_state_change);
5020 }
5021
5022 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5023 {
5024         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5025         struct net_device *dev = info->user_ptr[1];
5026         const u8 *ie = NULL, *bssid;
5027         int ie_len = 0;
5028         u16 reason_code;
5029         bool local_state_change;
5030
5031         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5032                 return -EINVAL;
5033
5034         if (!info->attrs[NL80211_ATTR_MAC])
5035                 return -EINVAL;
5036
5037         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5038                 return -EINVAL;
5039
5040         if (!rdev->ops->disassoc)
5041                 return -EOPNOTSUPP;
5042
5043         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5044             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5045                 return -EOPNOTSUPP;
5046
5047         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5048
5049         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5050         if (reason_code == 0) {
5051                 /* Reason Code 0 is reserved */
5052                 return -EINVAL;
5053         }
5054
5055         if (info->attrs[NL80211_ATTR_IE]) {
5056                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5057                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5058         }
5059
5060         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5061
5062         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5063                                       local_state_change);
5064 }
5065
5066 static bool
5067 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5068                          int mcast_rate[IEEE80211_NUM_BANDS],
5069                          int rateval)
5070 {
5071         struct wiphy *wiphy = &rdev->wiphy;
5072         bool found = false;
5073         int band, i;
5074
5075         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5076                 struct ieee80211_supported_band *sband;
5077
5078                 sband = wiphy->bands[band];
5079                 if (!sband)
5080                         continue;
5081
5082                 for (i = 0; i < sband->n_bitrates; i++) {
5083                         if (sband->bitrates[i].bitrate == rateval) {
5084                                 mcast_rate[band] = i + 1;
5085                                 found = true;
5086                                 break;
5087                         }
5088                 }
5089         }
5090
5091         return found;
5092 }
5093
5094 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5095 {
5096         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5097         struct net_device *dev = info->user_ptr[1];
5098         struct cfg80211_ibss_params ibss;
5099         struct wiphy *wiphy;
5100         struct cfg80211_cached_keys *connkeys = NULL;
5101         int err;
5102
5103         memset(&ibss, 0, sizeof(ibss));
5104
5105         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5106                 return -EINVAL;
5107
5108         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5109             !info->attrs[NL80211_ATTR_SSID] ||
5110             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5111                 return -EINVAL;
5112
5113         ibss.beacon_interval = 100;
5114
5115         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5116                 ibss.beacon_interval =
5117                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5118                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5119                         return -EINVAL;
5120         }
5121
5122         if (!rdev->ops->join_ibss)
5123                 return -EOPNOTSUPP;
5124
5125         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5126                 return -EOPNOTSUPP;
5127
5128         wiphy = &rdev->wiphy;
5129
5130         if (info->attrs[NL80211_ATTR_MAC]) {
5131                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5132
5133                 if (!is_valid_ether_addr(ibss.bssid))
5134                         return -EINVAL;
5135         }
5136         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5137         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5138
5139         if (info->attrs[NL80211_ATTR_IE]) {
5140                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5141                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5142         }
5143
5144         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5145                 enum nl80211_channel_type channel_type;
5146
5147                 if (!nl80211_valid_channel_type(info, &channel_type))
5148                         return -EINVAL;
5149
5150                 if (channel_type != NL80211_CHAN_NO_HT &&
5151                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5152                         return -EINVAL;
5153
5154                 ibss.channel_type = channel_type;
5155         } else {
5156                 ibss.channel_type = NL80211_CHAN_NO_HT;
5157         }
5158
5159         ibss.channel = rdev_freq_to_chan(rdev,
5160                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5161                 ibss.channel_type);
5162         if (!ibss.channel ||
5163             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5164             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5165                 return -EINVAL;
5166
5167         /* Both channels should be able to initiate communication */
5168         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5169              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5170             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5171                                           ibss.channel_type))
5172                 return -EINVAL;
5173
5174         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5175         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5176
5177         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5178                 u8 *rates =
5179                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5180                 int n_rates =
5181                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5182                 struct ieee80211_supported_band *sband =
5183                         wiphy->bands[ibss.channel->band];
5184
5185                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5186                                              &ibss.basic_rates);
5187                 if (err)
5188                         return err;
5189         }
5190
5191         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5192             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5193                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5194                 return -EINVAL;
5195
5196         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5197                 connkeys = nl80211_parse_connkeys(rdev,
5198                                         info->attrs[NL80211_ATTR_KEYS]);
5199                 if (IS_ERR(connkeys))
5200                         return PTR_ERR(connkeys);
5201         }
5202
5203         ibss.control_port =
5204                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5205
5206         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5207         if (err)
5208                 kfree(connkeys);
5209         return err;
5210 }
5211
5212 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5213 {
5214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5215         struct net_device *dev = info->user_ptr[1];
5216
5217         if (!rdev->ops->leave_ibss)
5218                 return -EOPNOTSUPP;
5219
5220         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5221                 return -EOPNOTSUPP;
5222
5223         return cfg80211_leave_ibss(rdev, dev, false);
5224 }
5225
5226 #ifdef CONFIG_NL80211_TESTMODE
5227 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5228         .name = "testmode",
5229 };
5230
5231 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5232 {
5233         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5234         int err;
5235
5236         if (!info->attrs[NL80211_ATTR_TESTDATA])
5237                 return -EINVAL;
5238
5239         err = -EOPNOTSUPP;
5240         if (rdev->ops->testmode_cmd) {
5241                 rdev->testmode_info = info;
5242                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5243                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5244                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5245                 rdev->testmode_info = NULL;
5246         }
5247
5248         return err;
5249 }
5250
5251 static int nl80211_testmode_dump(struct sk_buff *skb,
5252                                  struct netlink_callback *cb)
5253 {
5254         struct cfg80211_registered_device *rdev;
5255         int err;
5256         long phy_idx;
5257         void *data = NULL;
5258         int data_len = 0;
5259
5260         if (cb->args[0]) {
5261                 /*
5262                  * 0 is a valid index, but not valid for args[0],
5263                  * so we need to offset by 1.
5264                  */
5265                 phy_idx = cb->args[0] - 1;
5266         } else {
5267                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5268                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5269                                   nl80211_policy);
5270                 if (err)
5271                         return err;
5272
5273                 mutex_lock(&cfg80211_mutex);
5274                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5275                                                   nl80211_fam.attrbuf);
5276                 if (IS_ERR(rdev)) {
5277                         mutex_unlock(&cfg80211_mutex);
5278                         return PTR_ERR(rdev);
5279                 }
5280                 phy_idx = rdev->wiphy_idx;
5281                 rdev = NULL;
5282                 mutex_unlock(&cfg80211_mutex);
5283
5284                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5285                         cb->args[1] =
5286                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5287         }
5288
5289         if (cb->args[1]) {
5290                 data = nla_data((void *)cb->args[1]);
5291                 data_len = nla_len((void *)cb->args[1]);
5292         }
5293
5294         mutex_lock(&cfg80211_mutex);
5295         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5296         if (!rdev) {
5297                 mutex_unlock(&cfg80211_mutex);
5298                 return -ENOENT;
5299         }
5300         cfg80211_lock_rdev(rdev);
5301         mutex_unlock(&cfg80211_mutex);
5302
5303         if (!rdev->ops->testmode_dump) {
5304                 err = -EOPNOTSUPP;
5305                 goto out_err;
5306         }
5307
5308         while (1) {
5309                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5310                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5311                                            NL80211_CMD_TESTMODE);
5312                 struct nlattr *tmdata;
5313
5314                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5315                         genlmsg_cancel(skb, hdr);
5316                         break;
5317                 }
5318
5319                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5320                 if (!tmdata) {
5321                         genlmsg_cancel(skb, hdr);
5322                         break;
5323                 }
5324                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5325                                                data, data_len);
5326                 nla_nest_end(skb, tmdata);
5327
5328                 if (err == -ENOBUFS || err == -ENOENT) {
5329                         genlmsg_cancel(skb, hdr);
5330                         break;
5331                 } else if (err) {
5332                         genlmsg_cancel(skb, hdr);
5333                         goto out_err;
5334                 }
5335
5336                 genlmsg_end(skb, hdr);
5337         }
5338
5339         err = skb->len;
5340         /* see above */
5341         cb->args[0] = phy_idx + 1;
5342  out_err:
5343         cfg80211_unlock_rdev(rdev);
5344         return err;
5345 }
5346
5347 static struct sk_buff *
5348 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5349                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5350 {
5351         struct sk_buff *skb;
5352         void *hdr;
5353         struct nlattr *data;
5354
5355         skb = nlmsg_new(approxlen + 100, gfp);
5356         if (!skb)
5357                 return NULL;
5358
5359         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5360         if (!hdr) {
5361                 kfree_skb(skb);
5362                 return NULL;
5363         }
5364
5365         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5366                 goto nla_put_failure;
5367         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5368
5369         ((void **)skb->cb)[0] = rdev;
5370         ((void **)skb->cb)[1] = hdr;
5371         ((void **)skb->cb)[2] = data;
5372
5373         return skb;
5374
5375  nla_put_failure:
5376         kfree_skb(skb);
5377         return NULL;
5378 }
5379
5380 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5381                                                   int approxlen)
5382 {
5383         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5384
5385         if (WARN_ON(!rdev->testmode_info))
5386                 return NULL;
5387
5388         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5389                                 rdev->testmode_info->snd_pid,
5390                                 rdev->testmode_info->snd_seq,
5391                                 GFP_KERNEL);
5392 }
5393 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5394
5395 int cfg80211_testmode_reply(struct sk_buff *skb)
5396 {
5397         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5398         void *hdr = ((void **)skb->cb)[1];
5399         struct nlattr *data = ((void **)skb->cb)[2];
5400
5401         if (WARN_ON(!rdev->testmode_info)) {
5402                 kfree_skb(skb);
5403                 return -EINVAL;
5404         }
5405
5406         nla_nest_end(skb, data);
5407         genlmsg_end(skb, hdr);
5408         return genlmsg_reply(skb, rdev->testmode_info);
5409 }
5410 EXPORT_SYMBOL(cfg80211_testmode_reply);
5411
5412 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5413                                                   int approxlen, gfp_t gfp)
5414 {
5415         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5416
5417         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5418 }
5419 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5420
5421 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5422 {
5423         void *hdr = ((void **)skb->cb)[1];
5424         struct nlattr *data = ((void **)skb->cb)[2];
5425
5426         nla_nest_end(skb, data);
5427         genlmsg_end(skb, hdr);
5428         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5429 }
5430 EXPORT_SYMBOL(cfg80211_testmode_event);
5431 #endif
5432
5433 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5434 {
5435         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5436         struct net_device *dev = info->user_ptr[1];
5437         struct cfg80211_connect_params connect;
5438         struct wiphy *wiphy;
5439         struct cfg80211_cached_keys *connkeys = NULL;
5440         int err;
5441
5442         memset(&connect, 0, sizeof(connect));
5443
5444         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5445                 return -EINVAL;
5446
5447         if (!info->attrs[NL80211_ATTR_SSID] ||
5448             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5449                 return -EINVAL;
5450
5451         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5452                 connect.auth_type =
5453                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5454                 if (!nl80211_valid_auth_type(connect.auth_type))
5455                         return -EINVAL;
5456         } else
5457                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5458
5459         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5460
5461         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5462                                       NL80211_MAX_NR_CIPHER_SUITES);
5463         if (err)
5464                 return err;
5465
5466         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5467             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5468                 return -EOPNOTSUPP;
5469
5470         wiphy = &rdev->wiphy;
5471
5472         connect.bg_scan_period = -1;
5473         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5474                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5475                 connect.bg_scan_period =
5476                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5477         }
5478
5479         if (info->attrs[NL80211_ATTR_MAC])
5480                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5481         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5482         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5483
5484         if (info->attrs[NL80211_ATTR_IE]) {
5485                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5486                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5487         }
5488
5489         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5490                 connect.channel =
5491                         ieee80211_get_channel(wiphy,
5492                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5493                 if (!connect.channel ||
5494                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5495                         return -EINVAL;
5496         }
5497
5498         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5499                 connkeys = nl80211_parse_connkeys(rdev,
5500                                         info->attrs[NL80211_ATTR_KEYS]);
5501                 if (IS_ERR(connkeys))
5502                         return PTR_ERR(connkeys);
5503         }
5504
5505         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5506                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5507
5508         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5509                 memcpy(&connect.ht_capa_mask,
5510                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5511                        sizeof(connect.ht_capa_mask));
5512
5513         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5514                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5515                         return -EINVAL;
5516                 memcpy(&connect.ht_capa,
5517                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5518                        sizeof(connect.ht_capa));
5519         }
5520
5521         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5522         if (err)
5523                 kfree(connkeys);
5524         return err;
5525 }
5526
5527 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5528 {
5529         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5530         struct net_device *dev = info->user_ptr[1];
5531         u16 reason;
5532
5533         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5534                 reason = WLAN_REASON_DEAUTH_LEAVING;
5535         else
5536                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5537
5538         if (reason == 0)
5539                 return -EINVAL;
5540
5541         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5542             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5543                 return -EOPNOTSUPP;
5544
5545         return cfg80211_disconnect(rdev, dev, reason, true);
5546 }
5547
5548 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5549 {
5550         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5551         struct net *net;
5552         int err;
5553         u32 pid;
5554
5555         if (!info->attrs[NL80211_ATTR_PID])
5556                 return -EINVAL;
5557
5558         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5559
5560         net = get_net_ns_by_pid(pid);
5561         if (IS_ERR(net))
5562                 return PTR_ERR(net);
5563
5564         err = 0;
5565
5566         /* check if anything to do */
5567         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5568                 err = cfg80211_switch_netns(rdev, net);
5569
5570         put_net(net);
5571         return err;
5572 }
5573
5574 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5575 {
5576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5577         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5578                         struct cfg80211_pmksa *pmksa) = NULL;
5579         struct net_device *dev = info->user_ptr[1];
5580         struct cfg80211_pmksa pmksa;
5581
5582         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5583
5584         if (!info->attrs[NL80211_ATTR_MAC])
5585                 return -EINVAL;
5586
5587         if (!info->attrs[NL80211_ATTR_PMKID])
5588                 return -EINVAL;
5589
5590         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5591         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5592
5593         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5594             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5595                 return -EOPNOTSUPP;
5596
5597         switch (info->genlhdr->cmd) {
5598         case NL80211_CMD_SET_PMKSA:
5599                 rdev_ops = rdev->ops->set_pmksa;
5600                 break;
5601         case NL80211_CMD_DEL_PMKSA:
5602                 rdev_ops = rdev->ops->del_pmksa;
5603                 break;
5604         default:
5605                 WARN_ON(1);
5606                 break;
5607         }
5608
5609         if (!rdev_ops)
5610                 return -EOPNOTSUPP;
5611
5612         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5613 }
5614
5615 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5616 {
5617         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5618         struct net_device *dev = info->user_ptr[1];
5619
5620         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5621             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5622                 return -EOPNOTSUPP;
5623
5624         if (!rdev->ops->flush_pmksa)
5625                 return -EOPNOTSUPP;
5626
5627         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5628 }
5629
5630 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5631 {
5632         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5633         struct net_device *dev = info->user_ptr[1];
5634         u8 action_code, dialog_token;
5635         u16 status_code;
5636         u8 *peer;
5637
5638         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5639             !rdev->ops->tdls_mgmt)
5640                 return -EOPNOTSUPP;
5641
5642         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5643             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5644             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5645             !info->attrs[NL80211_ATTR_IE] ||
5646             !info->attrs[NL80211_ATTR_MAC])
5647                 return -EINVAL;
5648
5649         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5650         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5651         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5652         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5653
5654         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5655                                     dialog_token, status_code,
5656                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5657                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5658 }
5659
5660 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5661 {
5662         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5663         struct net_device *dev = info->user_ptr[1];
5664         enum nl80211_tdls_operation operation;
5665         u8 *peer;
5666
5667         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5668             !rdev->ops->tdls_oper)
5669                 return -EOPNOTSUPP;
5670
5671         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5672             !info->attrs[NL80211_ATTR_MAC])
5673                 return -EINVAL;
5674
5675         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5676         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5677
5678         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5679 }
5680
5681 static int nl80211_remain_on_channel(struct sk_buff *skb,
5682                                      struct genl_info *info)
5683 {
5684         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5685         struct net_device *dev = info->user_ptr[1];
5686         struct ieee80211_channel *chan;
5687         struct sk_buff *msg;
5688         void *hdr;
5689         u64 cookie;
5690         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5691         u32 freq, duration;
5692         int err;
5693
5694         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5695             !info->attrs[NL80211_ATTR_DURATION])
5696                 return -EINVAL;
5697
5698         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5699
5700         if (!rdev->ops->remain_on_channel ||
5701             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5702                 return -EOPNOTSUPP;
5703
5704         /*
5705          * We should be on that channel for at least a minimum amount of
5706          * time (10ms) but no longer than the driver supports.
5707          */
5708         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5709             duration > rdev->wiphy.max_remain_on_channel_duration)
5710                 return -EINVAL;
5711
5712         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5713             !nl80211_valid_channel_type(info, &channel_type))
5714                 return -EINVAL;
5715
5716         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5717         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5718         if (chan == NULL)
5719                 return -EINVAL;
5720
5721         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5722         if (!msg)
5723                 return -ENOMEM;
5724
5725         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5726                              NL80211_CMD_REMAIN_ON_CHANNEL);
5727
5728         if (IS_ERR(hdr)) {
5729                 err = PTR_ERR(hdr);
5730                 goto free_msg;
5731         }
5732
5733         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5734                                            channel_type, duration, &cookie);
5735
5736         if (err)
5737                 goto free_msg;
5738
5739         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5740                 goto nla_put_failure;
5741
5742         genlmsg_end(msg, hdr);
5743
5744         return genlmsg_reply(msg, info);
5745
5746  nla_put_failure:
5747         err = -ENOBUFS;
5748  free_msg:
5749         nlmsg_free(msg);
5750         return err;
5751 }
5752
5753 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5754                                             struct genl_info *info)
5755 {
5756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5757         struct net_device *dev = info->user_ptr[1];
5758         u64 cookie;
5759
5760         if (!info->attrs[NL80211_ATTR_COOKIE])
5761                 return -EINVAL;
5762
5763         if (!rdev->ops->cancel_remain_on_channel)
5764                 return -EOPNOTSUPP;
5765
5766         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5767
5768         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5769 }
5770
5771 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5772                            u8 *rates, u8 rates_len)
5773 {
5774         u8 i;
5775         u32 mask = 0;
5776
5777         for (i = 0; i < rates_len; i++) {
5778                 int rate = (rates[i] & 0x7f) * 5;
5779                 int ridx;
5780                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5781                         struct ieee80211_rate *srate =
5782                                 &sband->bitrates[ridx];
5783                         if (rate == srate->bitrate) {
5784                                 mask |= 1 << ridx;
5785                                 break;
5786                         }
5787                 }
5788                 if (ridx == sband->n_bitrates)
5789                         return 0; /* rate not found */
5790         }
5791
5792         return mask;
5793 }
5794
5795 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5796                                u8 *rates, u8 rates_len,
5797                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5798 {
5799         u8 i;
5800
5801         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5802
5803         for (i = 0; i < rates_len; i++) {
5804                 int ridx, rbit;
5805
5806                 ridx = rates[i] / 8;
5807                 rbit = BIT(rates[i] % 8);
5808
5809                 /* check validity */
5810                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5811                         return false;
5812
5813                 /* check availability */
5814                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5815                         mcs[ridx] |= rbit;
5816                 else
5817                         return false;
5818         }
5819
5820         return true;
5821 }
5822
5823 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5824         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5825                                     .len = NL80211_MAX_SUPP_RATES },
5826         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5827                                  .len = NL80211_MAX_SUPP_HT_RATES },
5828 };
5829
5830 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5831                                        struct genl_info *info)
5832 {
5833         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5835         struct cfg80211_bitrate_mask mask;
5836         int rem, i;
5837         struct net_device *dev = info->user_ptr[1];
5838         struct nlattr *tx_rates;
5839         struct ieee80211_supported_band *sband;
5840
5841         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5842                 return -EINVAL;
5843
5844         if (!rdev->ops->set_bitrate_mask)
5845                 return -EOPNOTSUPP;
5846
5847         memset(&mask, 0, sizeof(mask));
5848         /* Default to all rates enabled */
5849         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5850                 sband = rdev->wiphy.bands[i];
5851                 mask.control[i].legacy =
5852                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5853                 if (sband)
5854                         memcpy(mask.control[i].mcs,
5855                                sband->ht_cap.mcs.rx_mask,
5856                                sizeof(mask.control[i].mcs));
5857                 else
5858                         memset(mask.control[i].mcs, 0,
5859                                sizeof(mask.control[i].mcs));
5860         }
5861
5862         /*
5863          * The nested attribute uses enum nl80211_band as the index. This maps
5864          * directly to the enum ieee80211_band values used in cfg80211.
5865          */
5866         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5867         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5868         {
5869                 enum ieee80211_band band = nla_type(tx_rates);
5870                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5871                         return -EINVAL;
5872                 sband = rdev->wiphy.bands[band];
5873                 if (sband == NULL)
5874                         return -EINVAL;
5875                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5876                           nla_len(tx_rates), nl80211_txattr_policy);
5877                 if (tb[NL80211_TXRATE_LEGACY]) {
5878                         mask.control[band].legacy = rateset_to_mask(
5879                                 sband,
5880                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5881                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5882                         if ((mask.control[band].legacy == 0) &&
5883                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5884                                 return -EINVAL;
5885                 }
5886                 if (tb[NL80211_TXRATE_MCS]) {
5887                         if (!ht_rateset_to_mask(
5888                                         sband,
5889                                         nla_data(tb[NL80211_TXRATE_MCS]),
5890                                         nla_len(tb[NL80211_TXRATE_MCS]),
5891                                         mask.control[band].mcs))
5892                                 return -EINVAL;
5893                 }
5894
5895                 if (mask.control[band].legacy == 0) {
5896                         /* don't allow empty legacy rates if HT
5897                          * is not even supported. */
5898                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5899                                 return -EINVAL;
5900
5901                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5902                                 if (mask.control[band].mcs[i])
5903                                         break;
5904
5905                         /* legacy and mcs rates may not be both empty */
5906                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5907                                 return -EINVAL;
5908                 }
5909         }
5910
5911         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5912 }
5913
5914 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5915 {
5916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5917         struct net_device *dev = info->user_ptr[1];
5918         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5919
5920         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5921                 return -EINVAL;
5922
5923         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5924                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5925
5926         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5927             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5928             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5929             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5930             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5931             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5932             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5933                 return -EOPNOTSUPP;
5934
5935         /* not much point in registering if we can't reply */
5936         if (!rdev->ops->mgmt_tx)
5937                 return -EOPNOTSUPP;
5938
5939         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5940                         frame_type,
5941                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5942                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5943 }
5944
5945 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5946 {
5947         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5948         struct net_device *dev = info->user_ptr[1];
5949         struct ieee80211_channel *chan;
5950         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5951         bool channel_type_valid = false;
5952         u32 freq;
5953         int err;
5954         void *hdr = NULL;
5955         u64 cookie;
5956         struct sk_buff *msg = NULL;
5957         unsigned int wait = 0;
5958         bool offchan, no_cck, dont_wait_for_ack;
5959
5960         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5961
5962         if (!info->attrs[NL80211_ATTR_FRAME] ||
5963             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5964                 return -EINVAL;
5965
5966         if (!rdev->ops->mgmt_tx)
5967                 return -EOPNOTSUPP;
5968
5969         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5970             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5971             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5972             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5973             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5974             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5975             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5976                 return -EOPNOTSUPP;
5977
5978         if (info->attrs[NL80211_ATTR_DURATION]) {
5979                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5980                         return -EINVAL;
5981                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5982
5983                 /*
5984                  * We should wait on the channel for at least a minimum amount
5985                  * of time (10ms) but no longer than the driver supports.
5986                  */
5987                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5988                     wait > rdev->wiphy.max_remain_on_channel_duration)
5989                         return -EINVAL;
5990
5991         }
5992
5993         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5994                 if (!nl80211_valid_channel_type(info, &channel_type))
5995                         return -EINVAL;
5996                 channel_type_valid = true;
5997         }
5998
5999         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6000
6001         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6002                 return -EINVAL;
6003
6004         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6005
6006         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6007         chan = rdev_freq_to_chan(rdev, freq, channel_type);
6008         if (chan == NULL)
6009                 return -EINVAL;
6010
6011         if (!dont_wait_for_ack) {
6012                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6013                 if (!msg)
6014                         return -ENOMEM;
6015
6016                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6017                                      NL80211_CMD_FRAME);
6018
6019                 if (IS_ERR(hdr)) {
6020                         err = PTR_ERR(hdr);
6021                         goto free_msg;
6022                 }
6023         }
6024
6025         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
6026                                     channel_type_valid, wait,
6027                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6028                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6029                                     no_cck, dont_wait_for_ack, &cookie);
6030         if (err)
6031                 goto free_msg;
6032
6033         if (msg) {
6034                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6035                         goto nla_put_failure;
6036
6037                 genlmsg_end(msg, hdr);
6038                 return genlmsg_reply(msg, info);
6039         }
6040
6041         return 0;
6042
6043  nla_put_failure:
6044         err = -ENOBUFS;
6045  free_msg:
6046         nlmsg_free(msg);
6047         return err;
6048 }
6049
6050 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6051 {
6052         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6053         struct net_device *dev = info->user_ptr[1];
6054         u64 cookie;
6055
6056         if (!info->attrs[NL80211_ATTR_COOKIE])
6057                 return -EINVAL;
6058
6059         if (!rdev->ops->mgmt_tx_cancel_wait)
6060                 return -EOPNOTSUPP;
6061
6062         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6063             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6064             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6065             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6066             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6067             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6068                 return -EOPNOTSUPP;
6069
6070         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6071
6072         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6073 }
6074
6075 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6076 {
6077         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6078         struct wireless_dev *wdev;
6079         struct net_device *dev = info->user_ptr[1];
6080         u8 ps_state;
6081         bool state;
6082         int err;
6083
6084         if (!info->attrs[NL80211_ATTR_PS_STATE])
6085                 return -EINVAL;
6086
6087         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6088
6089         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6090                 return -EINVAL;
6091
6092         wdev = dev->ieee80211_ptr;
6093
6094         if (!rdev->ops->set_power_mgmt)
6095                 return -EOPNOTSUPP;
6096
6097         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6098
6099         if (state == wdev->ps)
6100                 return 0;
6101
6102         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6103                                         wdev->ps_timeout);
6104         if (!err)
6105                 wdev->ps = state;
6106         return err;
6107 }
6108
6109 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6110 {
6111         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6112         enum nl80211_ps_state ps_state;
6113         struct wireless_dev *wdev;
6114         struct net_device *dev = info->user_ptr[1];
6115         struct sk_buff *msg;
6116         void *hdr;
6117         int err;
6118
6119         wdev = dev->ieee80211_ptr;
6120
6121         if (!rdev->ops->set_power_mgmt)
6122                 return -EOPNOTSUPP;
6123
6124         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6125         if (!msg)
6126                 return -ENOMEM;
6127
6128         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6129                              NL80211_CMD_GET_POWER_SAVE);
6130         if (!hdr) {
6131                 err = -ENOBUFS;
6132                 goto free_msg;
6133         }
6134
6135         if (wdev->ps)
6136                 ps_state = NL80211_PS_ENABLED;
6137         else
6138                 ps_state = NL80211_PS_DISABLED;
6139
6140         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6141                 goto nla_put_failure;
6142
6143         genlmsg_end(msg, hdr);
6144         return genlmsg_reply(msg, info);
6145
6146  nla_put_failure:
6147         err = -ENOBUFS;
6148  free_msg:
6149         nlmsg_free(msg);
6150         return err;
6151 }
6152
6153 static struct nla_policy
6154 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6155         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6156         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6157         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6158 };
6159
6160 static int nl80211_set_cqm_rssi(struct genl_info *info,
6161                                 s32 threshold, u32 hysteresis)
6162 {
6163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6164         struct wireless_dev *wdev;
6165         struct net_device *dev = info->user_ptr[1];
6166
6167         if (threshold > 0)
6168                 return -EINVAL;
6169
6170         wdev = dev->ieee80211_ptr;
6171
6172         if (!rdev->ops->set_cqm_rssi_config)
6173                 return -EOPNOTSUPP;
6174
6175         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6176             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6177                 return -EOPNOTSUPP;
6178
6179         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6180                                               threshold, hysteresis);
6181 }
6182
6183 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6184 {
6185         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6186         struct nlattr *cqm;
6187         int err;
6188
6189         cqm = info->attrs[NL80211_ATTR_CQM];
6190         if (!cqm) {
6191                 err = -EINVAL;
6192                 goto out;
6193         }
6194
6195         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6196                                nl80211_attr_cqm_policy);
6197         if (err)
6198                 goto out;
6199
6200         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6201             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6202                 s32 threshold;
6203                 u32 hysteresis;
6204                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6205                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6206                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6207         } else
6208                 err = -EINVAL;
6209
6210 out:
6211         return err;
6212 }
6213
6214 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6215 {
6216         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6217         struct net_device *dev = info->user_ptr[1];
6218         struct mesh_config cfg;
6219         struct mesh_setup setup;
6220         int err;
6221
6222         /* start with default */
6223         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6224         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6225
6226         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6227                 /* and parse parameters if given */
6228                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6229                 if (err)
6230                         return err;
6231         }
6232
6233         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6234             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6235                 return -EINVAL;
6236
6237         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6238         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6239
6240         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6241             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6242                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6243                         return -EINVAL;
6244
6245         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6246                 /* parse additional setup parameters if given */
6247                 err = nl80211_parse_mesh_setup(info, &setup);
6248                 if (err)
6249                         return err;
6250         }
6251
6252         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6253                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6254
6255                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6256                     !nl80211_valid_channel_type(info, &channel_type))
6257                         return -EINVAL;
6258
6259                 setup.channel = rdev_freq_to_chan(rdev,
6260                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6261                         channel_type);
6262                 if (!setup.channel)
6263                         return -EINVAL;
6264                 setup.channel_type = channel_type;
6265         } else {
6266                 /* cfg80211_join_mesh() will sort it out */
6267                 setup.channel = NULL;
6268         }
6269
6270         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6271 }
6272
6273 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6274 {
6275         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6276         struct net_device *dev = info->user_ptr[1];
6277
6278         return cfg80211_leave_mesh(rdev, dev);
6279 }
6280
6281 #ifdef CONFIG_PM
6282 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6283 {
6284         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6285         struct sk_buff *msg;
6286         void *hdr;
6287
6288         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6289                 return -EOPNOTSUPP;
6290
6291         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6292         if (!msg)
6293                 return -ENOMEM;
6294
6295         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6296                              NL80211_CMD_GET_WOWLAN);
6297         if (!hdr)
6298                 goto nla_put_failure;
6299
6300         if (rdev->wowlan) {
6301                 struct nlattr *nl_wowlan;
6302
6303                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6304                 if (!nl_wowlan)
6305                         goto nla_put_failure;
6306
6307                 if ((rdev->wowlan->any &&
6308                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6309                     (rdev->wowlan->disconnect &&
6310                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6311                     (rdev->wowlan->magic_pkt &&
6312                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6313                     (rdev->wowlan->gtk_rekey_failure &&
6314                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6315                     (rdev->wowlan->eap_identity_req &&
6316                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6317                     (rdev->wowlan->four_way_handshake &&
6318                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6319                     (rdev->wowlan->rfkill_release &&
6320                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6321                         goto nla_put_failure;
6322                 if (rdev->wowlan->n_patterns) {
6323                         struct nlattr *nl_pats, *nl_pat;
6324                         int i, pat_len;
6325
6326                         nl_pats = nla_nest_start(msg,
6327                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6328                         if (!nl_pats)
6329                                 goto nla_put_failure;
6330
6331                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6332                                 nl_pat = nla_nest_start(msg, i + 1);
6333                                 if (!nl_pat)
6334                                         goto nla_put_failure;
6335                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6336                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6337                                             DIV_ROUND_UP(pat_len, 8),
6338                                             rdev->wowlan->patterns[i].mask) ||
6339                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6340                                             pat_len,
6341                                             rdev->wowlan->patterns[i].pattern))
6342                                         goto nla_put_failure;
6343                                 nla_nest_end(msg, nl_pat);
6344                         }
6345                         nla_nest_end(msg, nl_pats);
6346                 }
6347
6348                 nla_nest_end(msg, nl_wowlan);
6349         }
6350
6351         genlmsg_end(msg, hdr);
6352         return genlmsg_reply(msg, info);
6353
6354 nla_put_failure:
6355         nlmsg_free(msg);
6356         return -ENOBUFS;
6357 }
6358
6359 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6360 {
6361         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6362         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6363         struct cfg80211_wowlan no_triggers = {};
6364         struct cfg80211_wowlan new_triggers = {};
6365         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6366         int err, i;
6367         bool prev_enabled = rdev->wowlan;
6368
6369         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6370                 return -EOPNOTSUPP;
6371
6372         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6373                 goto no_triggers;
6374
6375         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6376                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6377                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6378                         nl80211_wowlan_policy);
6379         if (err)
6380                 return err;
6381
6382         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6383                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6384                         return -EINVAL;
6385                 new_triggers.any = true;
6386         }
6387
6388         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6389                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6390                         return -EINVAL;
6391                 new_triggers.disconnect = true;
6392         }
6393
6394         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6395                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6396                         return -EINVAL;
6397                 new_triggers.magic_pkt = true;
6398         }
6399
6400         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6401                 return -EINVAL;
6402
6403         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6404                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6405                         return -EINVAL;
6406                 new_triggers.gtk_rekey_failure = true;
6407         }
6408
6409         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6410                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6411                         return -EINVAL;
6412                 new_triggers.eap_identity_req = true;
6413         }
6414
6415         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6416                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6417                         return -EINVAL;
6418                 new_triggers.four_way_handshake = true;
6419         }
6420
6421         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6422                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6423                         return -EINVAL;
6424                 new_triggers.rfkill_release = true;
6425         }
6426
6427         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6428                 struct nlattr *pat;
6429                 int n_patterns = 0;
6430                 int rem, pat_len, mask_len;
6431                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6432
6433                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6434                                     rem)
6435                         n_patterns++;
6436                 if (n_patterns > wowlan->n_patterns)
6437                         return -EINVAL;
6438
6439                 new_triggers.patterns = kcalloc(n_patterns,
6440                                                 sizeof(new_triggers.patterns[0]),
6441                                                 GFP_KERNEL);
6442                 if (!new_triggers.patterns)
6443                         return -ENOMEM;
6444
6445                 new_triggers.n_patterns = n_patterns;
6446                 i = 0;
6447
6448                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6449                                     rem) {
6450                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6451                                   nla_data(pat), nla_len(pat), NULL);
6452                         err = -EINVAL;
6453                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6454                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6455                                 goto error;
6456                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6457                         mask_len = DIV_ROUND_UP(pat_len, 8);
6458                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6459                             mask_len)
6460                                 goto error;
6461                         if (pat_len > wowlan->pattern_max_len ||
6462                             pat_len < wowlan->pattern_min_len)
6463                                 goto error;
6464
6465                         new_triggers.patterns[i].mask =
6466                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6467                         if (!new_triggers.patterns[i].mask) {
6468                                 err = -ENOMEM;
6469                                 goto error;
6470                         }
6471                         new_triggers.patterns[i].pattern =
6472                                 new_triggers.patterns[i].mask + mask_len;
6473                         memcpy(new_triggers.patterns[i].mask,
6474                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6475                                mask_len);
6476                         new_triggers.patterns[i].pattern_len = pat_len;
6477                         memcpy(new_triggers.patterns[i].pattern,
6478                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6479                                pat_len);
6480                         i++;
6481                 }
6482         }
6483
6484         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6485                 struct cfg80211_wowlan *ntrig;
6486                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6487                                 GFP_KERNEL);
6488                 if (!ntrig) {
6489                         err = -ENOMEM;
6490                         goto error;
6491                 }
6492                 cfg80211_rdev_free_wowlan(rdev);
6493                 rdev->wowlan = ntrig;
6494         } else {
6495  no_triggers:
6496                 cfg80211_rdev_free_wowlan(rdev);
6497                 rdev->wowlan = NULL;
6498         }
6499
6500         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6501                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6502
6503         return 0;
6504  error:
6505         for (i = 0; i < new_triggers.n_patterns; i++)
6506                 kfree(new_triggers.patterns[i].mask);
6507         kfree(new_triggers.patterns);
6508         return err;
6509 }
6510 #endif
6511
6512 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6513 {
6514         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6515         struct net_device *dev = info->user_ptr[1];
6516         struct wireless_dev *wdev = dev->ieee80211_ptr;
6517         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6518         struct cfg80211_gtk_rekey_data rekey_data;
6519         int err;
6520
6521         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6522                 return -EINVAL;
6523
6524         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6525                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6526                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6527                         nl80211_rekey_policy);
6528         if (err)
6529                 return err;
6530
6531         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6532                 return -ERANGE;
6533         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6534                 return -ERANGE;
6535         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6536                 return -ERANGE;
6537
6538         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6539                NL80211_KEK_LEN);
6540         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6541                NL80211_KCK_LEN);
6542         memcpy(rekey_data.replay_ctr,
6543                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6544                NL80211_REPLAY_CTR_LEN);
6545
6546         wdev_lock(wdev);
6547         if (!wdev->current_bss) {
6548                 err = -ENOTCONN;
6549                 goto out;
6550         }
6551
6552         if (!rdev->ops->set_rekey_data) {
6553                 err = -EOPNOTSUPP;
6554                 goto out;
6555         }
6556
6557         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6558  out:
6559         wdev_unlock(wdev);
6560         return err;
6561 }
6562
6563 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6564                                              struct genl_info *info)
6565 {
6566         struct net_device *dev = info->user_ptr[1];
6567         struct wireless_dev *wdev = dev->ieee80211_ptr;
6568
6569         if (wdev->iftype != NL80211_IFTYPE_AP &&
6570             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6571                 return -EINVAL;
6572
6573         if (wdev->ap_unexpected_nlpid)
6574                 return -EBUSY;
6575
6576         wdev->ap_unexpected_nlpid = info->snd_pid;
6577         return 0;
6578 }
6579
6580 static int nl80211_probe_client(struct sk_buff *skb,
6581                                 struct genl_info *info)
6582 {
6583         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6584         struct net_device *dev = info->user_ptr[1];
6585         struct wireless_dev *wdev = dev->ieee80211_ptr;
6586         struct sk_buff *msg;
6587         void *hdr;
6588         const u8 *addr;
6589         u64 cookie;
6590         int err;
6591
6592         if (wdev->iftype != NL80211_IFTYPE_AP &&
6593             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6594                 return -EOPNOTSUPP;
6595
6596         if (!info->attrs[NL80211_ATTR_MAC])
6597                 return -EINVAL;
6598
6599         if (!rdev->ops->probe_client)
6600                 return -EOPNOTSUPP;
6601
6602         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6603         if (!msg)
6604                 return -ENOMEM;
6605
6606         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6607                              NL80211_CMD_PROBE_CLIENT);
6608
6609         if (IS_ERR(hdr)) {
6610                 err = PTR_ERR(hdr);
6611                 goto free_msg;
6612         }
6613
6614         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6615
6616         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6617         if (err)
6618                 goto free_msg;
6619
6620         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6621                 goto nla_put_failure;
6622
6623         genlmsg_end(msg, hdr);
6624
6625         return genlmsg_reply(msg, info);
6626
6627  nla_put_failure:
6628         err = -ENOBUFS;
6629  free_msg:
6630         nlmsg_free(msg);
6631         return err;
6632 }
6633
6634 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6635 {
6636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6637
6638         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6639                 return -EOPNOTSUPP;
6640
6641         if (rdev->ap_beacons_nlpid)
6642                 return -EBUSY;
6643
6644         rdev->ap_beacons_nlpid = info->snd_pid;
6645
6646         return 0;
6647 }
6648
6649 #define NL80211_FLAG_NEED_WIPHY         0x01
6650 #define NL80211_FLAG_NEED_NETDEV        0x02
6651 #define NL80211_FLAG_NEED_RTNL          0x04
6652 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6653 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6654                                          NL80211_FLAG_CHECK_NETDEV_UP)
6655
6656 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6657                             struct genl_info *info)
6658 {
6659         struct cfg80211_registered_device *rdev;
6660         struct net_device *dev;
6661         int err;
6662         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6663
6664         if (rtnl)
6665                 rtnl_lock();
6666
6667         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6668                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6669                 if (IS_ERR(rdev)) {
6670                         if (rtnl)
6671                                 rtnl_unlock();
6672                         return PTR_ERR(rdev);
6673                 }
6674                 info->user_ptr[0] = rdev;
6675         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6676                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6677                                               &rdev, &dev);
6678                 if (err) {
6679                         if (rtnl)
6680                                 rtnl_unlock();
6681                         return err;
6682                 }
6683                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6684                     !netif_running(dev)) {
6685                         cfg80211_unlock_rdev(rdev);
6686                         dev_put(dev);
6687                         if (rtnl)
6688                                 rtnl_unlock();
6689                         return -ENETDOWN;
6690                 }
6691                 info->user_ptr[0] = rdev;
6692                 info->user_ptr[1] = dev;
6693         }
6694
6695         return 0;
6696 }
6697
6698 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6699                               struct genl_info *info)
6700 {
6701         if (info->user_ptr[0])
6702                 cfg80211_unlock_rdev(info->user_ptr[0]);
6703         if (info->user_ptr[1])
6704                 dev_put(info->user_ptr[1]);
6705         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6706                 rtnl_unlock();
6707 }
6708
6709 static struct genl_ops nl80211_ops[] = {
6710         {
6711                 .cmd = NL80211_CMD_GET_WIPHY,
6712                 .doit = nl80211_get_wiphy,
6713                 .dumpit = nl80211_dump_wiphy,
6714                 .policy = nl80211_policy,
6715                 /* can be retrieved by unprivileged users */
6716                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6717         },
6718         {
6719                 .cmd = NL80211_CMD_SET_WIPHY,
6720                 .doit = nl80211_set_wiphy,
6721                 .policy = nl80211_policy,
6722                 .flags = GENL_ADMIN_PERM,
6723                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6724         },
6725         {
6726                 .cmd = NL80211_CMD_GET_INTERFACE,
6727                 .doit = nl80211_get_interface,
6728                 .dumpit = nl80211_dump_interface,
6729                 .policy = nl80211_policy,
6730                 /* can be retrieved by unprivileged users */
6731                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6732         },
6733         {
6734                 .cmd = NL80211_CMD_SET_INTERFACE,
6735                 .doit = nl80211_set_interface,
6736                 .policy = nl80211_policy,
6737                 .flags = GENL_ADMIN_PERM,
6738                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6739                                   NL80211_FLAG_NEED_RTNL,
6740         },
6741         {
6742                 .cmd = NL80211_CMD_NEW_INTERFACE,
6743                 .doit = nl80211_new_interface,
6744                 .policy = nl80211_policy,
6745                 .flags = GENL_ADMIN_PERM,
6746                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6747                                   NL80211_FLAG_NEED_RTNL,
6748         },
6749         {
6750                 .cmd = NL80211_CMD_DEL_INTERFACE,
6751                 .doit = nl80211_del_interface,
6752                 .policy = nl80211_policy,
6753                 .flags = GENL_ADMIN_PERM,
6754                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6755                                   NL80211_FLAG_NEED_RTNL,
6756         },
6757         {
6758                 .cmd = NL80211_CMD_GET_KEY,
6759                 .doit = nl80211_get_key,
6760                 .policy = nl80211_policy,
6761                 .flags = GENL_ADMIN_PERM,
6762                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6763                                   NL80211_FLAG_NEED_RTNL,
6764         },
6765         {
6766                 .cmd = NL80211_CMD_SET_KEY,
6767                 .doit = nl80211_set_key,
6768                 .policy = nl80211_policy,
6769                 .flags = GENL_ADMIN_PERM,
6770                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6771                                   NL80211_FLAG_NEED_RTNL,
6772         },
6773         {
6774                 .cmd = NL80211_CMD_NEW_KEY,
6775                 .doit = nl80211_new_key,
6776                 .policy = nl80211_policy,
6777                 .flags = GENL_ADMIN_PERM,
6778                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6779                                   NL80211_FLAG_NEED_RTNL,
6780         },
6781         {
6782                 .cmd = NL80211_CMD_DEL_KEY,
6783                 .doit = nl80211_del_key,
6784                 .policy = nl80211_policy,
6785                 .flags = GENL_ADMIN_PERM,
6786                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6787                                   NL80211_FLAG_NEED_RTNL,
6788         },
6789         {
6790                 .cmd = NL80211_CMD_SET_BEACON,
6791                 .policy = nl80211_policy,
6792                 .flags = GENL_ADMIN_PERM,
6793                 .doit = nl80211_set_beacon,
6794                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6795                                   NL80211_FLAG_NEED_RTNL,
6796         },
6797         {
6798                 .cmd = NL80211_CMD_START_AP,
6799                 .policy = nl80211_policy,
6800                 .flags = GENL_ADMIN_PERM,
6801                 .doit = nl80211_start_ap,
6802                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6803                                   NL80211_FLAG_NEED_RTNL,
6804         },
6805         {
6806                 .cmd = NL80211_CMD_STOP_AP,
6807                 .policy = nl80211_policy,
6808                 .flags = GENL_ADMIN_PERM,
6809                 .doit = nl80211_stop_ap,
6810                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6811                                   NL80211_FLAG_NEED_RTNL,
6812         },
6813         {
6814                 .cmd = NL80211_CMD_GET_STATION,
6815                 .doit = nl80211_get_station,
6816                 .dumpit = nl80211_dump_station,
6817                 .policy = nl80211_policy,
6818                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6819                                   NL80211_FLAG_NEED_RTNL,
6820         },
6821         {
6822                 .cmd = NL80211_CMD_SET_STATION,
6823                 .doit = nl80211_set_station,
6824                 .policy = nl80211_policy,
6825                 .flags = GENL_ADMIN_PERM,
6826                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6827                                   NL80211_FLAG_NEED_RTNL,
6828         },
6829         {
6830                 .cmd = NL80211_CMD_NEW_STATION,
6831                 .doit = nl80211_new_station,
6832                 .policy = nl80211_policy,
6833                 .flags = GENL_ADMIN_PERM,
6834                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6835                                   NL80211_FLAG_NEED_RTNL,
6836         },
6837         {
6838                 .cmd = NL80211_CMD_DEL_STATION,
6839                 .doit = nl80211_del_station,
6840                 .policy = nl80211_policy,
6841                 .flags = GENL_ADMIN_PERM,
6842                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6843                                   NL80211_FLAG_NEED_RTNL,
6844         },
6845         {
6846                 .cmd = NL80211_CMD_GET_MPATH,
6847                 .doit = nl80211_get_mpath,
6848                 .dumpit = nl80211_dump_mpath,
6849                 .policy = nl80211_policy,
6850                 .flags = GENL_ADMIN_PERM,
6851                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6852                                   NL80211_FLAG_NEED_RTNL,
6853         },
6854         {
6855                 .cmd = NL80211_CMD_SET_MPATH,
6856                 .doit = nl80211_set_mpath,
6857                 .policy = nl80211_policy,
6858                 .flags = GENL_ADMIN_PERM,
6859                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6860                                   NL80211_FLAG_NEED_RTNL,
6861         },
6862         {
6863                 .cmd = NL80211_CMD_NEW_MPATH,
6864                 .doit = nl80211_new_mpath,
6865                 .policy = nl80211_policy,
6866                 .flags = GENL_ADMIN_PERM,
6867                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6868                                   NL80211_FLAG_NEED_RTNL,
6869         },
6870         {
6871                 .cmd = NL80211_CMD_DEL_MPATH,
6872                 .doit = nl80211_del_mpath,
6873                 .policy = nl80211_policy,
6874                 .flags = GENL_ADMIN_PERM,
6875                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6876                                   NL80211_FLAG_NEED_RTNL,
6877         },
6878         {
6879                 .cmd = NL80211_CMD_SET_BSS,
6880                 .doit = nl80211_set_bss,
6881                 .policy = nl80211_policy,
6882                 .flags = GENL_ADMIN_PERM,
6883                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6884                                   NL80211_FLAG_NEED_RTNL,
6885         },
6886         {
6887                 .cmd = NL80211_CMD_GET_REG,
6888                 .doit = nl80211_get_reg,
6889                 .policy = nl80211_policy,
6890                 /* can be retrieved by unprivileged users */
6891         },
6892         {
6893                 .cmd = NL80211_CMD_SET_REG,
6894                 .doit = nl80211_set_reg,
6895                 .policy = nl80211_policy,
6896                 .flags = GENL_ADMIN_PERM,
6897         },
6898         {
6899                 .cmd = NL80211_CMD_REQ_SET_REG,
6900                 .doit = nl80211_req_set_reg,
6901                 .policy = nl80211_policy,
6902                 .flags = GENL_ADMIN_PERM,
6903         },
6904         {
6905                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6906                 .doit = nl80211_get_mesh_config,
6907                 .policy = nl80211_policy,
6908                 /* can be retrieved by unprivileged users */
6909                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6910                                   NL80211_FLAG_NEED_RTNL,
6911         },
6912         {
6913                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6914                 .doit = nl80211_update_mesh_config,
6915                 .policy = nl80211_policy,
6916                 .flags = GENL_ADMIN_PERM,
6917                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6918                                   NL80211_FLAG_NEED_RTNL,
6919         },
6920         {
6921                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6922                 .doit = nl80211_trigger_scan,
6923                 .policy = nl80211_policy,
6924                 .flags = GENL_ADMIN_PERM,
6925                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6926                                   NL80211_FLAG_NEED_RTNL,
6927         },
6928         {
6929                 .cmd = NL80211_CMD_GET_SCAN,
6930                 .policy = nl80211_policy,
6931                 .dumpit = nl80211_dump_scan,
6932         },
6933         {
6934                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6935                 .doit = nl80211_start_sched_scan,
6936                 .policy = nl80211_policy,
6937                 .flags = GENL_ADMIN_PERM,
6938                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6939                                   NL80211_FLAG_NEED_RTNL,
6940         },
6941         {
6942                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6943                 .doit = nl80211_stop_sched_scan,
6944                 .policy = nl80211_policy,
6945                 .flags = GENL_ADMIN_PERM,
6946                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6947                                   NL80211_FLAG_NEED_RTNL,
6948         },
6949         {
6950                 .cmd = NL80211_CMD_AUTHENTICATE,
6951                 .doit = nl80211_authenticate,
6952                 .policy = nl80211_policy,
6953                 .flags = GENL_ADMIN_PERM,
6954                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6955                                   NL80211_FLAG_NEED_RTNL,
6956         },
6957         {
6958                 .cmd = NL80211_CMD_ASSOCIATE,
6959                 .doit = nl80211_associate,
6960                 .policy = nl80211_policy,
6961                 .flags = GENL_ADMIN_PERM,
6962                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6963                                   NL80211_FLAG_NEED_RTNL,
6964         },
6965         {
6966                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6967                 .doit = nl80211_deauthenticate,
6968                 .policy = nl80211_policy,
6969                 .flags = GENL_ADMIN_PERM,
6970                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6971                                   NL80211_FLAG_NEED_RTNL,
6972         },
6973         {
6974                 .cmd = NL80211_CMD_DISASSOCIATE,
6975                 .doit = nl80211_disassociate,
6976                 .policy = nl80211_policy,
6977                 .flags = GENL_ADMIN_PERM,
6978                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6979                                   NL80211_FLAG_NEED_RTNL,
6980         },
6981         {
6982                 .cmd = NL80211_CMD_JOIN_IBSS,
6983                 .doit = nl80211_join_ibss,
6984                 .policy = nl80211_policy,
6985                 .flags = GENL_ADMIN_PERM,
6986                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6987                                   NL80211_FLAG_NEED_RTNL,
6988         },
6989         {
6990                 .cmd = NL80211_CMD_LEAVE_IBSS,
6991                 .doit = nl80211_leave_ibss,
6992                 .policy = nl80211_policy,
6993                 .flags = GENL_ADMIN_PERM,
6994                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6995                                   NL80211_FLAG_NEED_RTNL,
6996         },
6997 #ifdef CONFIG_NL80211_TESTMODE
6998         {
6999                 .cmd = NL80211_CMD_TESTMODE,
7000                 .doit = nl80211_testmode_do,
7001                 .dumpit = nl80211_testmode_dump,
7002                 .policy = nl80211_policy,
7003                 .flags = GENL_ADMIN_PERM,
7004                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7005                                   NL80211_FLAG_NEED_RTNL,
7006         },
7007 #endif
7008         {
7009                 .cmd = NL80211_CMD_CONNECT,
7010                 .doit = nl80211_connect,
7011                 .policy = nl80211_policy,
7012                 .flags = GENL_ADMIN_PERM,
7013                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7014                                   NL80211_FLAG_NEED_RTNL,
7015         },
7016         {
7017                 .cmd = NL80211_CMD_DISCONNECT,
7018                 .doit = nl80211_disconnect,
7019                 .policy = nl80211_policy,
7020                 .flags = GENL_ADMIN_PERM,
7021                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7022                                   NL80211_FLAG_NEED_RTNL,
7023         },
7024         {
7025                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7026                 .doit = nl80211_wiphy_netns,
7027                 .policy = nl80211_policy,
7028                 .flags = GENL_ADMIN_PERM,
7029                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7030                                   NL80211_FLAG_NEED_RTNL,
7031         },
7032         {
7033                 .cmd = NL80211_CMD_GET_SURVEY,
7034                 .policy = nl80211_policy,
7035                 .dumpit = nl80211_dump_survey,
7036         },
7037         {
7038                 .cmd = NL80211_CMD_SET_PMKSA,
7039                 .doit = nl80211_setdel_pmksa,
7040                 .policy = nl80211_policy,
7041                 .flags = GENL_ADMIN_PERM,
7042                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7043                                   NL80211_FLAG_NEED_RTNL,
7044         },
7045         {
7046                 .cmd = NL80211_CMD_DEL_PMKSA,
7047                 .doit = nl80211_setdel_pmksa,
7048                 .policy = nl80211_policy,
7049                 .flags = GENL_ADMIN_PERM,
7050                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7051                                   NL80211_FLAG_NEED_RTNL,
7052         },
7053         {
7054                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7055                 .doit = nl80211_flush_pmksa,
7056                 .policy = nl80211_policy,
7057                 .flags = GENL_ADMIN_PERM,
7058                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7059                                   NL80211_FLAG_NEED_RTNL,
7060         },
7061         {
7062                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7063                 .doit = nl80211_remain_on_channel,
7064                 .policy = nl80211_policy,
7065                 .flags = GENL_ADMIN_PERM,
7066                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7067                                   NL80211_FLAG_NEED_RTNL,
7068         },
7069         {
7070                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7071                 .doit = nl80211_cancel_remain_on_channel,
7072                 .policy = nl80211_policy,
7073                 .flags = GENL_ADMIN_PERM,
7074                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7075                                   NL80211_FLAG_NEED_RTNL,
7076         },
7077         {
7078                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7079                 .doit = nl80211_set_tx_bitrate_mask,
7080                 .policy = nl80211_policy,
7081                 .flags = GENL_ADMIN_PERM,
7082                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7083                                   NL80211_FLAG_NEED_RTNL,
7084         },
7085         {
7086                 .cmd = NL80211_CMD_REGISTER_FRAME,
7087                 .doit = nl80211_register_mgmt,
7088                 .policy = nl80211_policy,
7089                 .flags = GENL_ADMIN_PERM,
7090                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7091                                   NL80211_FLAG_NEED_RTNL,
7092         },
7093         {
7094                 .cmd = NL80211_CMD_FRAME,
7095                 .doit = nl80211_tx_mgmt,
7096                 .policy = nl80211_policy,
7097                 .flags = GENL_ADMIN_PERM,
7098                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7099                                   NL80211_FLAG_NEED_RTNL,
7100         },
7101         {
7102                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7103                 .doit = nl80211_tx_mgmt_cancel_wait,
7104                 .policy = nl80211_policy,
7105                 .flags = GENL_ADMIN_PERM,
7106                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7107                                   NL80211_FLAG_NEED_RTNL,
7108         },
7109         {
7110                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7111                 .doit = nl80211_set_power_save,
7112                 .policy = nl80211_policy,
7113                 .flags = GENL_ADMIN_PERM,
7114                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7115                                   NL80211_FLAG_NEED_RTNL,
7116         },
7117         {
7118                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7119                 .doit = nl80211_get_power_save,
7120                 .policy = nl80211_policy,
7121                 /* can be retrieved by unprivileged users */
7122                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7123                                   NL80211_FLAG_NEED_RTNL,
7124         },
7125         {
7126                 .cmd = NL80211_CMD_SET_CQM,
7127                 .doit = nl80211_set_cqm,
7128                 .policy = nl80211_policy,
7129                 .flags = GENL_ADMIN_PERM,
7130                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7131                                   NL80211_FLAG_NEED_RTNL,
7132         },
7133         {
7134                 .cmd = NL80211_CMD_SET_CHANNEL,
7135                 .doit = nl80211_set_channel,
7136                 .policy = nl80211_policy,
7137                 .flags = GENL_ADMIN_PERM,
7138                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7139                                   NL80211_FLAG_NEED_RTNL,
7140         },
7141         {
7142                 .cmd = NL80211_CMD_SET_WDS_PEER,
7143                 .doit = nl80211_set_wds_peer,
7144                 .policy = nl80211_policy,
7145                 .flags = GENL_ADMIN_PERM,
7146                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7147                                   NL80211_FLAG_NEED_RTNL,
7148         },
7149         {
7150                 .cmd = NL80211_CMD_JOIN_MESH,
7151                 .doit = nl80211_join_mesh,
7152                 .policy = nl80211_policy,
7153                 .flags = GENL_ADMIN_PERM,
7154                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7155                                   NL80211_FLAG_NEED_RTNL,
7156         },
7157         {
7158                 .cmd = NL80211_CMD_LEAVE_MESH,
7159                 .doit = nl80211_leave_mesh,
7160                 .policy = nl80211_policy,
7161                 .flags = GENL_ADMIN_PERM,
7162                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7163                                   NL80211_FLAG_NEED_RTNL,
7164         },
7165 #ifdef CONFIG_PM
7166         {
7167                 .cmd = NL80211_CMD_GET_WOWLAN,
7168                 .doit = nl80211_get_wowlan,
7169                 .policy = nl80211_policy,
7170                 /* can be retrieved by unprivileged users */
7171                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7172                                   NL80211_FLAG_NEED_RTNL,
7173         },
7174         {
7175                 .cmd = NL80211_CMD_SET_WOWLAN,
7176                 .doit = nl80211_set_wowlan,
7177                 .policy = nl80211_policy,
7178                 .flags = GENL_ADMIN_PERM,
7179                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7180                                   NL80211_FLAG_NEED_RTNL,
7181         },
7182 #endif
7183         {
7184                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7185                 .doit = nl80211_set_rekey_data,
7186                 .policy = nl80211_policy,
7187                 .flags = GENL_ADMIN_PERM,
7188                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7189                                   NL80211_FLAG_NEED_RTNL,
7190         },
7191         {
7192                 .cmd = NL80211_CMD_TDLS_MGMT,
7193                 .doit = nl80211_tdls_mgmt,
7194                 .policy = nl80211_policy,
7195                 .flags = GENL_ADMIN_PERM,
7196                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7197                                   NL80211_FLAG_NEED_RTNL,
7198         },
7199         {
7200                 .cmd = NL80211_CMD_TDLS_OPER,
7201                 .doit = nl80211_tdls_oper,
7202                 .policy = nl80211_policy,
7203                 .flags = GENL_ADMIN_PERM,
7204                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7205                                   NL80211_FLAG_NEED_RTNL,
7206         },
7207         {
7208                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7209                 .doit = nl80211_register_unexpected_frame,
7210                 .policy = nl80211_policy,
7211                 .flags = GENL_ADMIN_PERM,
7212                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7213                                   NL80211_FLAG_NEED_RTNL,
7214         },
7215         {
7216                 .cmd = NL80211_CMD_PROBE_CLIENT,
7217                 .doit = nl80211_probe_client,
7218                 .policy = nl80211_policy,
7219                 .flags = GENL_ADMIN_PERM,
7220                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7221                                   NL80211_FLAG_NEED_RTNL,
7222         },
7223         {
7224                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7225                 .doit = nl80211_register_beacons,
7226                 .policy = nl80211_policy,
7227                 .flags = GENL_ADMIN_PERM,
7228                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7229                                   NL80211_FLAG_NEED_RTNL,
7230         },
7231         {
7232                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7233                 .doit = nl80211_set_noack_map,
7234                 .policy = nl80211_policy,
7235                 .flags = GENL_ADMIN_PERM,
7236                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7237                                   NL80211_FLAG_NEED_RTNL,
7238         },
7239
7240 };
7241
7242 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7243         .name = "mlme",
7244 };
7245
7246 /* multicast groups */
7247 static struct genl_multicast_group nl80211_config_mcgrp = {
7248         .name = "config",
7249 };
7250 static struct genl_multicast_group nl80211_scan_mcgrp = {
7251         .name = "scan",
7252 };
7253 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7254         .name = "regulatory",
7255 };
7256
7257 /* notification functions */
7258
7259 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7260 {
7261         struct sk_buff *msg;
7262
7263         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7264         if (!msg)
7265                 return;
7266
7267         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7268                 nlmsg_free(msg);
7269                 return;
7270         }
7271
7272         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7273                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7274 }
7275
7276 static int nl80211_add_scan_req(struct sk_buff *msg,
7277                                 struct cfg80211_registered_device *rdev)
7278 {
7279         struct cfg80211_scan_request *req = rdev->scan_req;
7280         struct nlattr *nest;
7281         int i;
7282
7283         ASSERT_RDEV_LOCK(rdev);
7284
7285         if (WARN_ON(!req))
7286                 return 0;
7287
7288         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7289         if (!nest)
7290                 goto nla_put_failure;
7291         for (i = 0; i < req->n_ssids; i++) {
7292                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7293                         goto nla_put_failure;
7294         }
7295         nla_nest_end(msg, nest);
7296
7297         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7298         if (!nest)
7299                 goto nla_put_failure;
7300         for (i = 0; i < req->n_channels; i++) {
7301                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7302                         goto nla_put_failure;
7303         }
7304         nla_nest_end(msg, nest);
7305
7306         if (req->ie &&
7307             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7308                 goto nla_put_failure;
7309
7310         return 0;
7311  nla_put_failure:
7312         return -ENOBUFS;
7313 }
7314
7315 static int nl80211_send_scan_msg(struct sk_buff *msg,
7316                                  struct cfg80211_registered_device *rdev,
7317                                  struct net_device *netdev,
7318                                  u32 pid, u32 seq, int flags,
7319                                  u32 cmd)
7320 {
7321         void *hdr;
7322
7323         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7324         if (!hdr)
7325                 return -1;
7326
7327         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7328             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7329                 goto nla_put_failure;
7330
7331         /* ignore errors and send incomplete event anyway */
7332         nl80211_add_scan_req(msg, rdev);
7333
7334         return genlmsg_end(msg, hdr);
7335
7336  nla_put_failure:
7337         genlmsg_cancel(msg, hdr);
7338         return -EMSGSIZE;
7339 }
7340
7341 static int
7342 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7343                             struct cfg80211_registered_device *rdev,
7344                             struct net_device *netdev,
7345                             u32 pid, u32 seq, int flags, u32 cmd)
7346 {
7347         void *hdr;
7348
7349         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7350         if (!hdr)
7351                 return -1;
7352
7353         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7354             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7355                 goto nla_put_failure;
7356
7357         return genlmsg_end(msg, hdr);
7358
7359  nla_put_failure:
7360         genlmsg_cancel(msg, hdr);
7361         return -EMSGSIZE;
7362 }
7363
7364 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7365                              struct net_device *netdev)
7366 {
7367         struct sk_buff *msg;
7368
7369         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7370         if (!msg)
7371                 return;
7372
7373         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7374                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7375                 nlmsg_free(msg);
7376                 return;
7377         }
7378
7379         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7380                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7381 }
7382
7383 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7384                             struct net_device *netdev)
7385 {
7386         struct sk_buff *msg;
7387
7388         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7389         if (!msg)
7390                 return;
7391
7392         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7393                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7394                 nlmsg_free(msg);
7395                 return;
7396         }
7397
7398         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7399                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7400 }
7401
7402 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7403                                struct net_device *netdev)
7404 {
7405         struct sk_buff *msg;
7406
7407         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7408         if (!msg)
7409                 return;
7410
7411         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7412                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7413                 nlmsg_free(msg);
7414                 return;
7415         }
7416
7417         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7418                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7419 }
7420
7421 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7422                                      struct net_device *netdev)
7423 {
7424         struct sk_buff *msg;
7425
7426         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7427         if (!msg)
7428                 return;
7429
7430         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7431                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7432                 nlmsg_free(msg);
7433                 return;
7434         }
7435
7436         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7437                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7438 }
7439
7440 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7441                              struct net_device *netdev, u32 cmd)
7442 {
7443         struct sk_buff *msg;
7444
7445         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7446         if (!msg)
7447                 return;
7448
7449         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7450                 nlmsg_free(msg);
7451                 return;
7452         }
7453
7454         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7455                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7456 }
7457
7458 /*
7459  * This can happen on global regulatory changes or device specific settings
7460  * based on custom world regulatory domains.
7461  */
7462 void nl80211_send_reg_change_event(struct regulatory_request *request)
7463 {
7464         struct sk_buff *msg;
7465         void *hdr;
7466
7467         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7468         if (!msg)
7469                 return;
7470
7471         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7472         if (!hdr) {
7473                 nlmsg_free(msg);
7474                 return;
7475         }
7476
7477         /* Userspace can always count this one always being set */
7478         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7479                 goto nla_put_failure;
7480
7481         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7482                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7483                                NL80211_REGDOM_TYPE_WORLD))
7484                         goto nla_put_failure;
7485         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7486                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7487                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7488                         goto nla_put_failure;
7489         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7490                    request->intersect) {
7491                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7492                                NL80211_REGDOM_TYPE_INTERSECTION))
7493                         goto nla_put_failure;
7494         } else {
7495                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7496                                NL80211_REGDOM_TYPE_COUNTRY) ||
7497                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7498                                    request->alpha2))
7499                         goto nla_put_failure;
7500         }
7501
7502         if (wiphy_idx_valid(request->wiphy_idx) &&
7503             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7504                 goto nla_put_failure;
7505
7506         genlmsg_end(msg, hdr);
7507
7508         rcu_read_lock();
7509         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7510                                 GFP_ATOMIC);
7511         rcu_read_unlock();
7512
7513         return;
7514
7515 nla_put_failure:
7516         genlmsg_cancel(msg, hdr);
7517         nlmsg_free(msg);
7518 }
7519
7520 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7521                                     struct net_device *netdev,
7522                                     const u8 *buf, size_t len,
7523                                     enum nl80211_commands cmd, gfp_t gfp)
7524 {
7525         struct sk_buff *msg;
7526         void *hdr;
7527
7528         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7529         if (!msg)
7530                 return;
7531
7532         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7533         if (!hdr) {
7534                 nlmsg_free(msg);
7535                 return;
7536         }
7537
7538         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7539             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7540             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7541                 goto nla_put_failure;
7542
7543         genlmsg_end(msg, hdr);
7544
7545         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7546                                 nl80211_mlme_mcgrp.id, gfp);
7547         return;
7548
7549  nla_put_failure:
7550         genlmsg_cancel(msg, hdr);
7551         nlmsg_free(msg);
7552 }
7553
7554 void nl80211_send_rx_auth(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_AUTHENTICATE, gfp);
7560 }
7561
7562 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7563                            struct net_device *netdev, const u8 *buf,
7564                            size_t len, gfp_t gfp)
7565 {
7566         nl80211_send_mlme_event(rdev, netdev, buf, len,
7567                                 NL80211_CMD_ASSOCIATE, gfp);
7568 }
7569
7570 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7571                          struct net_device *netdev, const u8 *buf,
7572                          size_t len, gfp_t gfp)
7573 {
7574         nl80211_send_mlme_event(rdev, netdev, buf, len,
7575                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7576 }
7577
7578 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7579                            struct net_device *netdev, const u8 *buf,
7580                            size_t len, gfp_t gfp)
7581 {
7582         nl80211_send_mlme_event(rdev, netdev, buf, len,
7583                                 NL80211_CMD_DISASSOCIATE, gfp);
7584 }
7585
7586 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7587                                 struct net_device *netdev, const u8 *buf,
7588                                 size_t len, gfp_t gfp)
7589 {
7590         nl80211_send_mlme_event(rdev, netdev, buf, len,
7591                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7592 }
7593
7594 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7595                                   struct net_device *netdev, const u8 *buf,
7596                                   size_t len, gfp_t gfp)
7597 {
7598         nl80211_send_mlme_event(rdev, netdev, buf, len,
7599                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7600 }
7601
7602 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7603                                       struct net_device *netdev, int cmd,
7604                                       const u8 *addr, gfp_t gfp)
7605 {
7606         struct sk_buff *msg;
7607         void *hdr;
7608
7609         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7610         if (!msg)
7611                 return;
7612
7613         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7614         if (!hdr) {
7615                 nlmsg_free(msg);
7616                 return;
7617         }
7618
7619         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7620             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7621             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7622             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7623                 goto nla_put_failure;
7624
7625         genlmsg_end(msg, hdr);
7626
7627         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7628                                 nl80211_mlme_mcgrp.id, gfp);
7629         return;
7630
7631  nla_put_failure:
7632         genlmsg_cancel(msg, hdr);
7633         nlmsg_free(msg);
7634 }
7635
7636 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7637                                struct net_device *netdev, const u8 *addr,
7638                                gfp_t gfp)
7639 {
7640         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7641                                   addr, gfp);
7642 }
7643
7644 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7645                                 struct net_device *netdev, const u8 *addr,
7646                                 gfp_t gfp)
7647 {
7648         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7649                                   addr, gfp);
7650 }
7651
7652 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7653                                  struct net_device *netdev, const u8 *bssid,
7654                                  const u8 *req_ie, size_t req_ie_len,
7655                                  const u8 *resp_ie, size_t resp_ie_len,
7656                                  u16 status, 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_CONNECT);
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             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7674             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7675             (req_ie &&
7676              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7677             (resp_ie &&
7678              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7679                 goto nla_put_failure;
7680
7681         genlmsg_end(msg, hdr);
7682
7683         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7684                                 nl80211_mlme_mcgrp.id, gfp);
7685         return;
7686
7687  nla_put_failure:
7688         genlmsg_cancel(msg, hdr);
7689         nlmsg_free(msg);
7690
7691 }
7692
7693 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7694                          struct net_device *netdev, const u8 *bssid,
7695                          const u8 *req_ie, size_t req_ie_len,
7696                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7697 {
7698         struct sk_buff *msg;
7699         void *hdr;
7700
7701         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7702         if (!msg)
7703                 return;
7704
7705         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7706         if (!hdr) {
7707                 nlmsg_free(msg);
7708                 return;
7709         }
7710
7711         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7712             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7713             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7714             (req_ie &&
7715              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7716             (resp_ie &&
7717              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7718                 goto nla_put_failure;
7719
7720         genlmsg_end(msg, hdr);
7721
7722         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7723                                 nl80211_mlme_mcgrp.id, gfp);
7724         return;
7725
7726  nla_put_failure:
7727         genlmsg_cancel(msg, hdr);
7728         nlmsg_free(msg);
7729
7730 }
7731
7732 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7733                                struct net_device *netdev, u16 reason,
7734                                const u8 *ie, size_t ie_len, bool from_ap)
7735 {
7736         struct sk_buff *msg;
7737         void *hdr;
7738
7739         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7740         if (!msg)
7741                 return;
7742
7743         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7744         if (!hdr) {
7745                 nlmsg_free(msg);
7746                 return;
7747         }
7748
7749         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7750             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7751             (from_ap && reason &&
7752              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7753             (from_ap &&
7754              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7755             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7756                 goto nla_put_failure;
7757
7758         genlmsg_end(msg, hdr);
7759
7760         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7761                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7762         return;
7763
7764  nla_put_failure:
7765         genlmsg_cancel(msg, hdr);
7766         nlmsg_free(msg);
7767
7768 }
7769
7770 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7771                              struct net_device *netdev, const u8 *bssid,
7772                              gfp_t gfp)
7773 {
7774         struct sk_buff *msg;
7775         void *hdr;
7776
7777         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7778         if (!msg)
7779                 return;
7780
7781         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7782         if (!hdr) {
7783                 nlmsg_free(msg);
7784                 return;
7785         }
7786
7787         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7788             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7789             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7790                 goto nla_put_failure;
7791
7792         genlmsg_end(msg, hdr);
7793
7794         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7795                                 nl80211_mlme_mcgrp.id, gfp);
7796         return;
7797
7798  nla_put_failure:
7799         genlmsg_cancel(msg, hdr);
7800         nlmsg_free(msg);
7801 }
7802
7803 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7804                 struct net_device *netdev,
7805                 const u8 *macaddr, const u8* ie, u8 ie_len,
7806                 gfp_t gfp)
7807 {
7808         struct sk_buff *msg;
7809         void *hdr;
7810
7811         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7812         if (!msg)
7813                 return;
7814
7815         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7816         if (!hdr) {
7817                 nlmsg_free(msg);
7818                 return;
7819         }
7820
7821         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7822             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7823             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7824             (ie_len && ie &&
7825              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7826                 goto nla_put_failure;
7827
7828         genlmsg_end(msg, hdr);
7829
7830         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7831                                 nl80211_mlme_mcgrp.id, gfp);
7832         return;
7833
7834  nla_put_failure:
7835         genlmsg_cancel(msg, hdr);
7836         nlmsg_free(msg);
7837 }
7838
7839 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7840                                  struct net_device *netdev, const u8 *addr,
7841                                  enum nl80211_key_type key_type, int key_id,
7842                                  const u8 *tsc, gfp_t gfp)
7843 {
7844         struct sk_buff *msg;
7845         void *hdr;
7846
7847         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7848         if (!msg)
7849                 return;
7850
7851         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7852         if (!hdr) {
7853                 nlmsg_free(msg);
7854                 return;
7855         }
7856
7857         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7858             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7859             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7860             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7861             (key_id != -1 &&
7862              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7863             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7864                 goto nla_put_failure;
7865
7866         genlmsg_end(msg, hdr);
7867
7868         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7869                                 nl80211_mlme_mcgrp.id, gfp);
7870         return;
7871
7872  nla_put_failure:
7873         genlmsg_cancel(msg, hdr);
7874         nlmsg_free(msg);
7875 }
7876
7877 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7878                                     struct ieee80211_channel *channel_before,
7879                                     struct ieee80211_channel *channel_after)
7880 {
7881         struct sk_buff *msg;
7882         void *hdr;
7883         struct nlattr *nl_freq;
7884
7885         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7886         if (!msg)
7887                 return;
7888
7889         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7890         if (!hdr) {
7891                 nlmsg_free(msg);
7892                 return;
7893         }
7894
7895         /*
7896          * Since we are applying the beacon hint to a wiphy we know its
7897          * wiphy_idx is valid
7898          */
7899         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7900                 goto nla_put_failure;
7901
7902         /* Before */
7903         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7904         if (!nl_freq)
7905                 goto nla_put_failure;
7906         if (nl80211_msg_put_channel(msg, channel_before))
7907                 goto nla_put_failure;
7908         nla_nest_end(msg, nl_freq);
7909
7910         /* After */
7911         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7912         if (!nl_freq)
7913                 goto nla_put_failure;
7914         if (nl80211_msg_put_channel(msg, channel_after))
7915                 goto nla_put_failure;
7916         nla_nest_end(msg, nl_freq);
7917
7918         genlmsg_end(msg, hdr);
7919
7920         rcu_read_lock();
7921         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7922                                 GFP_ATOMIC);
7923         rcu_read_unlock();
7924
7925         return;
7926
7927 nla_put_failure:
7928         genlmsg_cancel(msg, hdr);
7929         nlmsg_free(msg);
7930 }
7931
7932 static void nl80211_send_remain_on_chan_event(
7933         int cmd, struct cfg80211_registered_device *rdev,
7934         struct net_device *netdev, u64 cookie,
7935         struct ieee80211_channel *chan,
7936         enum nl80211_channel_type channel_type,
7937         unsigned int duration, gfp_t gfp)
7938 {
7939         struct sk_buff *msg;
7940         void *hdr;
7941
7942         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7943         if (!msg)
7944                 return;
7945
7946         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7947         if (!hdr) {
7948                 nlmsg_free(msg);
7949                 return;
7950         }
7951
7952         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7953             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7954             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7955             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7956             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7957                 goto nla_put_failure;
7958
7959         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7960             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7961                 goto nla_put_failure;
7962
7963         genlmsg_end(msg, hdr);
7964
7965         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7966                                 nl80211_mlme_mcgrp.id, gfp);
7967         return;
7968
7969  nla_put_failure:
7970         genlmsg_cancel(msg, hdr);
7971         nlmsg_free(msg);
7972 }
7973
7974 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7975                                     struct net_device *netdev, u64 cookie,
7976                                     struct ieee80211_channel *chan,
7977                                     enum nl80211_channel_type channel_type,
7978                                     unsigned int duration, gfp_t gfp)
7979 {
7980         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7981                                           rdev, netdev, cookie, chan,
7982                                           channel_type, duration, gfp);
7983 }
7984
7985 void nl80211_send_remain_on_channel_cancel(
7986         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7987         u64 cookie, struct ieee80211_channel *chan,
7988         enum nl80211_channel_type channel_type, gfp_t gfp)
7989 {
7990         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7991                                           rdev, netdev, cookie, chan,
7992                                           channel_type, 0, gfp);
7993 }
7994
7995 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7996                             struct net_device *dev, const u8 *mac_addr,
7997                             struct station_info *sinfo, gfp_t gfp)
7998 {
7999         struct sk_buff *msg;
8000
8001         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8002         if (!msg)
8003                 return;
8004
8005         if (nl80211_send_station(msg, 0, 0, 0,
8006                                  rdev, dev, mac_addr, sinfo) < 0) {
8007                 nlmsg_free(msg);
8008                 return;
8009         }
8010
8011         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8012                                 nl80211_mlme_mcgrp.id, gfp);
8013 }
8014
8015 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8016                                 struct net_device *dev, const u8 *mac_addr,
8017                                 gfp_t gfp)
8018 {
8019         struct sk_buff *msg;
8020         void *hdr;
8021
8022         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8023         if (!msg)
8024                 return;
8025
8026         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8027         if (!hdr) {
8028                 nlmsg_free(msg);
8029                 return;
8030         }
8031
8032         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8033             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8034                 goto nla_put_failure;
8035
8036         genlmsg_end(msg, hdr);
8037
8038         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8039                                 nl80211_mlme_mcgrp.id, gfp);
8040         return;
8041
8042  nla_put_failure:
8043         genlmsg_cancel(msg, hdr);
8044         nlmsg_free(msg);
8045 }
8046
8047 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8048                                        const u8 *addr, gfp_t gfp)
8049 {
8050         struct wireless_dev *wdev = dev->ieee80211_ptr;
8051         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8052         struct sk_buff *msg;
8053         void *hdr;
8054         int err;
8055         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8056
8057         if (!nlpid)
8058                 return false;
8059
8060         msg = nlmsg_new(100, gfp);
8061         if (!msg)
8062                 return true;
8063
8064         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8065         if (!hdr) {
8066                 nlmsg_free(msg);
8067                 return true;
8068         }
8069
8070         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8071             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8072             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8073                 goto nla_put_failure;
8074
8075         err = genlmsg_end(msg, hdr);
8076         if (err < 0) {
8077                 nlmsg_free(msg);
8078                 return true;
8079         }
8080
8081         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8082         return true;
8083
8084  nla_put_failure:
8085         genlmsg_cancel(msg, hdr);
8086         nlmsg_free(msg);
8087         return true;
8088 }
8089
8090 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8091 {
8092         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8093                                           addr, gfp);
8094 }
8095
8096 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8097                                     const u8 *addr, gfp_t gfp)
8098 {
8099         return __nl80211_unexpected_frame(dev,
8100                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8101                                           addr, gfp);
8102 }
8103
8104 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8105                       struct net_device *netdev, u32 nlpid,
8106                       int freq, int sig_dbm,
8107                       const u8 *buf, size_t len, gfp_t gfp)
8108 {
8109         struct sk_buff *msg;
8110         void *hdr;
8111
8112         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8113         if (!msg)
8114                 return -ENOMEM;
8115
8116         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8117         if (!hdr) {
8118                 nlmsg_free(msg);
8119                 return -ENOMEM;
8120         }
8121
8122         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8123             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8124             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8125             (sig_dbm &&
8126              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8127             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8128                 goto nla_put_failure;
8129
8130         genlmsg_end(msg, hdr);
8131
8132         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8133
8134  nla_put_failure:
8135         genlmsg_cancel(msg, hdr);
8136         nlmsg_free(msg);
8137         return -ENOBUFS;
8138 }
8139
8140 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8141                                  struct net_device *netdev, u64 cookie,
8142                                  const u8 *buf, size_t len, bool ack,
8143                                  gfp_t gfp)
8144 {
8145         struct sk_buff *msg;
8146         void *hdr;
8147
8148         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8149         if (!msg)
8150                 return;
8151
8152         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8153         if (!hdr) {
8154                 nlmsg_free(msg);
8155                 return;
8156         }
8157
8158         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8159             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8160             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8161             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8162             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8163                 goto nla_put_failure;
8164
8165         genlmsg_end(msg, hdr);
8166
8167         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8168         return;
8169
8170  nla_put_failure:
8171         genlmsg_cancel(msg, hdr);
8172         nlmsg_free(msg);
8173 }
8174
8175 void
8176 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8177                              struct net_device *netdev,
8178                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8179                              gfp_t gfp)
8180 {
8181         struct sk_buff *msg;
8182         struct nlattr *pinfoattr;
8183         void *hdr;
8184
8185         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8186         if (!msg)
8187                 return;
8188
8189         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8190         if (!hdr) {
8191                 nlmsg_free(msg);
8192                 return;
8193         }
8194
8195         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8196             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8197                 goto nla_put_failure;
8198
8199         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8200         if (!pinfoattr)
8201                 goto nla_put_failure;
8202
8203         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8204                         rssi_event))
8205                 goto nla_put_failure;
8206
8207         nla_nest_end(msg, pinfoattr);
8208
8209         genlmsg_end(msg, hdr);
8210
8211         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8212                                 nl80211_mlme_mcgrp.id, gfp);
8213         return;
8214
8215  nla_put_failure:
8216         genlmsg_cancel(msg, hdr);
8217         nlmsg_free(msg);
8218 }
8219
8220 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8221                               struct net_device *netdev, const u8 *bssid,
8222                               const u8 *replay_ctr, gfp_t gfp)
8223 {
8224         struct sk_buff *msg;
8225         struct nlattr *rekey_attr;
8226         void *hdr;
8227
8228         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8229         if (!msg)
8230                 return;
8231
8232         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8233         if (!hdr) {
8234                 nlmsg_free(msg);
8235                 return;
8236         }
8237
8238         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8239             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8240             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8241                 goto nla_put_failure;
8242
8243         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8244         if (!rekey_attr)
8245                 goto nla_put_failure;
8246
8247         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8248                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8249                 goto nla_put_failure;
8250
8251         nla_nest_end(msg, rekey_attr);
8252
8253         genlmsg_end(msg, hdr);
8254
8255         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8256                                 nl80211_mlme_mcgrp.id, gfp);
8257         return;
8258
8259  nla_put_failure:
8260         genlmsg_cancel(msg, hdr);
8261         nlmsg_free(msg);
8262 }
8263
8264 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8265                                     struct net_device *netdev, int index,
8266                                     const u8 *bssid, bool preauth, gfp_t gfp)
8267 {
8268         struct sk_buff *msg;
8269         struct nlattr *attr;
8270         void *hdr;
8271
8272         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8273         if (!msg)
8274                 return;
8275
8276         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8277         if (!hdr) {
8278                 nlmsg_free(msg);
8279                 return;
8280         }
8281
8282         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8283             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8284                 goto nla_put_failure;
8285
8286         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8287         if (!attr)
8288                 goto nla_put_failure;
8289
8290         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8291             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8292             (preauth &&
8293              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8294                 goto nla_put_failure;
8295
8296         nla_nest_end(msg, attr);
8297
8298         genlmsg_end(msg, hdr);
8299
8300         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8301                                 nl80211_mlme_mcgrp.id, gfp);
8302         return;
8303
8304  nla_put_failure:
8305         genlmsg_cancel(msg, hdr);
8306         nlmsg_free(msg);
8307 }
8308
8309 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8310                               struct net_device *netdev, int freq,
8311                               enum nl80211_channel_type type, gfp_t gfp)
8312 {
8313         struct sk_buff *msg;
8314         void *hdr;
8315
8316         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8317         if (!msg)
8318                 return;
8319
8320         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8321         if (!hdr) {
8322                 nlmsg_free(msg);
8323                 return;
8324         }
8325
8326         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8327             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8328             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8329                 goto nla_put_failure;
8330
8331         genlmsg_end(msg, hdr);
8332
8333         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8334                                 nl80211_mlme_mcgrp.id, gfp);
8335         return;
8336
8337  nla_put_failure:
8338         genlmsg_cancel(msg, hdr);
8339         nlmsg_free(msg);
8340 }
8341
8342 void
8343 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8344                                 struct net_device *netdev, const u8 *peer,
8345                                 u32 num_packets, gfp_t gfp)
8346 {
8347         struct sk_buff *msg;
8348         struct nlattr *pinfoattr;
8349         void *hdr;
8350
8351         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8352         if (!msg)
8353                 return;
8354
8355         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8356         if (!hdr) {
8357                 nlmsg_free(msg);
8358                 return;
8359         }
8360
8361         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8362             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8363             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8364                 goto nla_put_failure;
8365
8366         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8367         if (!pinfoattr)
8368                 goto nla_put_failure;
8369
8370         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8371                 goto nla_put_failure;
8372
8373         nla_nest_end(msg, pinfoattr);
8374
8375         genlmsg_end(msg, hdr);
8376
8377         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8378                                 nl80211_mlme_mcgrp.id, gfp);
8379         return;
8380
8381  nla_put_failure:
8382         genlmsg_cancel(msg, hdr);
8383         nlmsg_free(msg);
8384 }
8385
8386 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8387                            u64 cookie, bool acked, gfp_t gfp)
8388 {
8389         struct wireless_dev *wdev = dev->ieee80211_ptr;
8390         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8391         struct sk_buff *msg;
8392         void *hdr;
8393         int err;
8394
8395         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8396         if (!msg)
8397                 return;
8398
8399         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8400         if (!hdr) {
8401                 nlmsg_free(msg);
8402                 return;
8403         }
8404
8405         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8406             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8407             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8408             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8409             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8410                 goto nla_put_failure;
8411
8412         err = genlmsg_end(msg, hdr);
8413         if (err < 0) {
8414                 nlmsg_free(msg);
8415                 return;
8416         }
8417
8418         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8419                                 nl80211_mlme_mcgrp.id, gfp);
8420         return;
8421
8422  nla_put_failure:
8423         genlmsg_cancel(msg, hdr);
8424         nlmsg_free(msg);
8425 }
8426 EXPORT_SYMBOL(cfg80211_probe_status);
8427
8428 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8429                                  const u8 *frame, size_t len,
8430                                  int freq, int sig_dbm, gfp_t gfp)
8431 {
8432         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8433         struct sk_buff *msg;
8434         void *hdr;
8435         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8436
8437         if (!nlpid)
8438                 return;
8439
8440         msg = nlmsg_new(len + 100, gfp);
8441         if (!msg)
8442                 return;
8443
8444         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8445         if (!hdr) {
8446                 nlmsg_free(msg);
8447                 return;
8448         }
8449
8450         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8451             (freq &&
8452              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8453             (sig_dbm &&
8454              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8455             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8456                 goto nla_put_failure;
8457
8458         genlmsg_end(msg, hdr);
8459
8460         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8461         return;
8462
8463  nla_put_failure:
8464         genlmsg_cancel(msg, hdr);
8465         nlmsg_free(msg);
8466 }
8467 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8468
8469 static int nl80211_netlink_notify(struct notifier_block * nb,
8470                                   unsigned long state,
8471                                   void *_notify)
8472 {
8473         struct netlink_notify *notify = _notify;
8474         struct cfg80211_registered_device *rdev;
8475         struct wireless_dev *wdev;
8476
8477         if (state != NETLINK_URELEASE)
8478                 return NOTIFY_DONE;
8479
8480         rcu_read_lock();
8481
8482         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8483                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8484                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8485                 if (rdev->ap_beacons_nlpid == notify->pid)
8486                         rdev->ap_beacons_nlpid = 0;
8487         }
8488
8489         rcu_read_unlock();
8490
8491         return NOTIFY_DONE;
8492 }
8493
8494 static struct notifier_block nl80211_netlink_notifier = {
8495         .notifier_call = nl80211_netlink_notify,
8496 };
8497
8498 /* initialisation/exit functions */
8499
8500 int nl80211_init(void)
8501 {
8502         int err;
8503
8504         err = genl_register_family_with_ops(&nl80211_fam,
8505                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8506         if (err)
8507                 return err;
8508
8509         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8510         if (err)
8511                 goto err_out;
8512
8513         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8514         if (err)
8515                 goto err_out;
8516
8517         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8518         if (err)
8519                 goto err_out;
8520
8521         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8522         if (err)
8523                 goto err_out;
8524
8525 #ifdef CONFIG_NL80211_TESTMODE
8526         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8527         if (err)
8528                 goto err_out;
8529 #endif
8530
8531         err = netlink_register_notifier(&nl80211_netlink_notifier);
8532         if (err)
8533                 goto err_out;
8534
8535         return 0;
8536  err_out:
8537         genl_unregister_family(&nl80211_fam);
8538         return err;
8539 }
8540
8541 void nl80211_exit(void)
8542 {
8543         netlink_unregister_notifier(&nl80211_netlink_notifier);
8544         genl_unregister_family(&nl80211_fam);
8545 }